[16] | 1 | #!/usr/bin/perl |
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| 2 | # IBM_PROLOG_BEGIN_TAG |
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| 3 | # This is an automatically generated prolog. |
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| 4 | # |
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| 5 | # |
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| 6 | # |
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| 7 | # Licensed Materials - Property of IBM |
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| 8 | # |
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| 9 | # (C) COPYRIGHT International Business Machines Corp. 2000,2006 |
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| 10 | # All Rights Reserved |
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| 11 | # |
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| 12 | # US Government Users Restricted Rights - Use, duplication or |
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| 13 | # disclosure restricted by GSA ADP Schedule Contract with IBM Corp. |
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| 14 | # |
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| 15 | # IBM_PROLOG_END_TAG |
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| 16 | # @(#)24 1.50 src/avs/fs/mmfs/ts/admin/mmdsh, mmfs, avs_rgpfs24, rgpfs240610b 2/12/06 12:34:29 |
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| 17 | ############################################################################# |
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| 18 | # |
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| 19 | # Module: mmdsh |
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| 20 | # |
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| 21 | #CPRY |
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| 22 | # 5765-296 (C) Copyright IBM Corporation 1994, 2000 |
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| 23 | # Licensed Materials - Property of IBM |
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| 24 | # All rights reserved. |
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| 25 | # US Government Users Restricted Rights - |
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| 26 | # Use, duplication or disclosure restricted by |
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| 27 | # GSA ADP Schedule Contract with IBM Corp. |
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| 28 | #CPRY |
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| 29 | # |
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| 30 | ############################################################################# |
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| 31 | # |
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| 32 | # Description: command for running commands on multiple nodes or |
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| 33 | # network connected hosts in parallel |
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| 34 | # |
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| 35 | # mmdsh [-isv] [-f num] [-F hostlistfile] [-L listofhosts] [-I file] [-k] |
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| 36 | # [-N nodespecification] [-R reportfile] [-r] [command] |
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| 37 | # |
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| 38 | # Flags/parms: |
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| 39 | # |
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| 40 | # [-f num] Specifies a fanout value used for concurrent execution. |
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| 41 | # |
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| 42 | # [-F hostlistfile] |
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| 43 | # Runs the command on the hosts in the specified hostlistfile. |
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| 44 | # The hostlistfile argument is the fully qualified name |
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| 45 | # of a file that lists the names of the desired hosts, |
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| 46 | # one host per line. |
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| 47 | # |
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| 48 | # [-i] Displays the set of nodes on which the command will run |
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| 49 | # before command execution. |
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| 50 | # |
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| 51 | # [-I file] Name of the file to be copied on the remote node prior |
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| 52 | # to executing the command. The file must be in /var/mmfs/tmp. |
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| 53 | # This option can be specified twice. |
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| 54 | # |
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| 55 | # [-k] Remove files specified with the -I flag before exiting. |
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| 56 | # |
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| 57 | # [-L listofhosts] |
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| 58 | # Runs the command on the specified list of hosts. |
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| 59 | # The listofhosts argument is a comma-separated list of hosts. |
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| 60 | # |
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| 61 | # [-N nodespecification] |
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| 62 | # Runs the command on the nodes in the given node specification. |
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| 63 | # The nodespecification argument can be a comma-separated list of |
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| 64 | # nodes, a node file, or a node class. The nodes in the list or |
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| 65 | # the file can be specified as long or short admin or daemon |
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| 66 | # node names, node numbers, node number ranges, or IP addresses. |
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| 67 | # |
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| 68 | # [-R reportfile] |
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| 69 | # Reports the list of hosts removed from the working collective |
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| 70 | # when host verification (host ping) fails. The report is written |
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| 71 | # to the specified file with one host per line. The report is |
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| 72 | # generated only when combined with the '-v' flag. |
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| 73 | # |
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| 74 | # [-r] Reports the list of hosts removed from the working collective |
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| 75 | # when host verification (host ping) fails. The report is written |
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| 76 | # to standard error. The report is generated only when combined |
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| 77 | # with the '-v' flag. |
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| 78 | # |
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| 79 | # [-s] Suppresses the prepending of the hostname string to each line |
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| 80 | # of output generated by running the command on the remote host. |
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| 81 | # |
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| 82 | # [-v] Verify that each host is reachable before adding it to the |
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| 83 | # set of nodes on which the command will run. |
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| 84 | # |
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| 85 | # [command] command to be run on the remote hosts. |
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| 86 | # If the command is the reserved word "_SELECT_FROM_FILE_", |
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| 87 | # then the commands to be run on the different hosts are |
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| 88 | # expected to be in the file pointed to by the environment |
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| 89 | # variable mmdshCommandsFile. Each line of this file consists |
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| 90 | # of hostname followed by a command string. |
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| 91 | # |
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| 92 | # Outputs: |
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| 93 | # The command is executed on the specified host(s). |
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| 94 | # |
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| 95 | # Examples: |
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| 96 | # mmdsh -F /nodes uname -a |
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| 97 | # mmdsh -L host1,host2,host3 ls |
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| 98 | # mmdsh -N quorumnodes date |
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| 99 | # |
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| 100 | ############################################################################# |
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| 101 | |
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| 102 | # Obtain valid "waitpid" flags. |
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| 103 | use POSIX ":sys_wait_h"; |
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| 104 | |
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| 105 | $MMCOMMON="/usr/lpp/mmfs/bin/mmcommon"; |
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| 106 | $REL_HOSTNAME_Field=8; |
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| 107 | |
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| 108 | |
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| 109 | #---------------------------------------------------------------------------- |
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| 110 | # |
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| 111 | # Function: Correct the return value from system() and etc. |
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| 112 | # |
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| 113 | #---------------------------------------------------------------------------- |
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| 114 | sub normalizeRC |
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| 115 | { |
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| 116 | local ($rc); |
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| 117 | |
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| 118 | $rc = $_[0] + 0; |
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| 119 | if ($rc >= 256) { $rc = $rc / 256; } |
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| 120 | |
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| 121 | return $rc; |
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| 122 | |
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| 123 | } #---- end of function normalizeRC ----------------------------------- |
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| 124 | |
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| 125 | |
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| 126 | #---------------------------------------------------------------------------- |
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| 127 | # |
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| 128 | # Function: Print a message using the message catalog facilities. |
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| 129 | # |
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| 130 | # Input: $_[0] - message number in catalog |
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| 131 | # $_[1] - message text formatting string |
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| 132 | # ... - optional message parameters (up to 5) |
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| 133 | # |
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| 134 | #---------------------------------------------------------------------------- |
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| 135 | |
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| 136 | sub prtMsg |
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| 137 | { |
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| 138 | local ($msgNum) = shift(@_); |
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| 139 | local ($p1) = shift(@_); |
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| 140 | local ($p2) = shift(@_); |
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| 141 | local ($p3) = shift(@_); |
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| 142 | local ($p4) = shift(@_); |
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| 143 | local ($p5) = shift(@_); |
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| 144 | |
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| 145 | local ($msgTxt); |
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| 146 | local ($prog); |
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| 147 | |
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| 148 | chop($prog = `/bin/basename $0`); |
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| 149 | |
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| 150 | for ($msgNum) { |
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| 151 | |
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| 152 | if (/^13$/) |
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| 153 | { |
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| 154 | $msgTxt="%s: Incorrect option: %s"; |
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| 155 | } |
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| 156 | elsif (/^36$/) |
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| 157 | { |
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| 158 | $msgTxt="%s: %s flag specified twice."; |
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| 159 | } |
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| 160 | elsif (/^38$/) |
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| 161 | { |
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| 162 | $msgTxt="%s: Invalid extra argument: %s"; |
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| 163 | } |
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| 164 | elsif (/^40$/) |
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| 165 | { |
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| 166 | $msgTxt="%s: Invalid integer for %s: %s"; |
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| 167 | } |
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| 168 | elsif (/^153$/) |
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| 169 | { |
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| 170 | $msgTxt="%s: Invalid value for %s flag"; |
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| 171 | } |
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| 172 | elsif (/^168$/) |
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| 173 | { |
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| 174 | $msgTxt="%s: The device name %s starts with a slash, but not /dev/."; |
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| 175 | } |
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| 176 | elsif (/^171$/) |
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| 177 | { |
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| 178 | $msgTxt="%s: Unexpected error from %s. Return code: %s"; |
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| 179 | } |
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| 180 | elsif (/^204$/) |
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| 181 | { |
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| 182 | $msgTxt="%s: Missing argument after %s flag"; |
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| 183 | } |
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| 184 | elsif (/^206$/) |
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| 185 | { |
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| 186 | $msgTxt="Command %s failed with return code %s."; |
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| 187 | } |
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| 188 | elsif (/^362$/) |
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| 189 | { |
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| 190 | $msgTxt="%s: Nodes on which the command will be run:"; |
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| 191 | } |
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| 192 | elsif (/^363$/) |
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| 193 | { |
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| 194 | $msgTxt="%s: WCOLL (working collective) environment variable not set."; |
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| 195 | } |
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| 196 | elsif (/^364$/) |
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| 197 | { |
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| 198 | $msgTxt="%s: Cannot open file %s. Error string was: %s"; |
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| 199 | } |
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| 200 | elsif (/^365$/) |
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| 201 | { |
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| 202 | $msgTxt="%s: %s remote shell process had return code %s."; |
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| 203 | } |
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| 204 | elsif (/^366$/) |
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| 205 | { |
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| 206 | $msgTxt="%s: Caught SIG %s - terminating the child processes."; |
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| 207 | } |
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| 208 | elsif (/^367$/) |
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| 209 | { |
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| 210 | $msgTxt="%s: There are no available nodes on which to run the command."; |
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| 211 | } |
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| 212 | elsif (/^368$/) |
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| 213 | { |
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| 214 | $msgTxt="%s: Unable to pipe. Error string was: %s"; |
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| 215 | } |
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| 216 | elsif (/^369$/) |
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| 217 | { |
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| 218 | $msgTxt="%s: Unable to redirect %s. Error string was: %s"; |
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| 219 | } |
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| 220 | elsif (/^422$/) |
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| 221 | { |
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| 222 | $msgTxt="%s: Invalid or missing remote shell command: %s"; |
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| 223 | } |
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| 224 | elsif (/^423$/) |
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| 225 | { |
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| 226 | $msgTxt="%s: Invalid or missing remote file copy command: %s"; |
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| 227 | } |
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| 228 | elsif (/^573$/) |
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| 229 | { |
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| 230 | $msgTxt="%s: Node %s is not available to run the command."; |
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| 231 | } |
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| 232 | else # should never happen |
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| 233 | { |
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| 234 | $msgTxt="\n%s: An unknown error number %s was passed to prtMsg."; |
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| 235 | printf STDERR "$msgTxt\n\n", $prog, $msgNum; |
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| 236 | return; |
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| 237 | } |
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| 238 | } |
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| 239 | |
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| 240 | if ($osName eq "AIX") |
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| 241 | { |
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| 242 | $msg=`$DSPMSG $msgNum \"$msgTxt\" \"$prog\" \"$p1\" \"$p2\" \"$p3\" \"$p4\" \"$p5\"`; |
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| 243 | printf STDERR "$msg\n"; |
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| 244 | } |
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| 245 | else |
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| 246 | { |
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| 247 | printf STDERR "$msgTxt\n", $prog, $p1, $p2, $p3, $p4, $p5; |
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| 248 | } |
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| 249 | |
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| 250 | } #---- end of function prtMsg ---------------------------------------- |
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| 251 | |
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| 252 | |
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| 253 | #---------------------------------------------------------------------------- |
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| 254 | # |
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| 255 | # read_pipes_and_wait |
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| 256 | # |
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| 257 | # Read STDOUT and STDERR on specified child rsh process pipes. |
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| 258 | # Display to parent's STDOUT or STDERR. If the '-s' flag is not |
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| 259 | # specified, then host output is preceded by "hostname: ". |
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| 260 | # |
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| 261 | # Output from STDERR is first written to an array, since there is |
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| 262 | # a limit of 32k from STDERR before it ends up hanging. |
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| 263 | # |
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| 264 | # Reap completed children to allow additional child processes to be |
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| 265 | # spawned for fanout maintenance. |
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| 266 | # |
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| 267 | # Parameters: |
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| 268 | # final_read -- true to "read/wait" on all specified children, false |
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| 269 | # to only "read" currently available data for specified |
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| 270 | # children and reap any completed children for fanout |
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| 271 | # maintenance. |
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| 272 | # hosts -- Array of hostnames with STDOUT/STDERR pipes to query. |
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| 273 | # |
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| 274 | #---------------------------------------------------------------------------- |
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| 275 | |
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| 276 | sub read_pipes_and_wait { |
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| 277 | |
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| 278 | my $final_read = shift; |
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| 279 | |
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| 280 | local(@hosts) = @_; |
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| 281 | |
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| 282 | local($fno,$fh,$rin,$rout,$num_fh,$host,$err_ctr,$array_updated,$offset); |
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| 283 | |
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| 284 | # Initialize the pipes read select vector. |
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| 285 | $rin = ''; |
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| 286 | $num_fh = 0; |
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| 287 | foreach $host (@hosts) { |
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| 288 | if (($fno = fileno($r_out{$host})) ne '') { |
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| 289 | vec($rin, $fno, 1) = 1; |
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| 290 | $num_fh++; |
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| 291 | } |
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| 292 | if (($fno = fileno($r_err{$host})) ne '') { |
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| 293 | vec($rin, $fno, 1) = 1; |
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| 294 | $num_fh++; |
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| 295 | } |
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| 296 | } |
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| 297 | |
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| 298 | $err_ctr = 0; |
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| 299 | $array_updated = 0; |
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| 300 | |
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| 301 | READWAIT: { |
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| 302 | |
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| 303 | if ($num_fh > 0) { |
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| 304 | # Wait for outstanding I/O on read pipes. |
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| 305 | $nready = select($rout = $rin, undef, undef, undef); |
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| 306 | if ($nready > 0) { |
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| 307 | # At least one pipe has available data. |
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| 308 | foreach $host (@hosts) { |
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| 309 | |
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| 310 | # Process STDOUT I/O |
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| 311 | $fh = $r_out{$host}; |
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| 312 | if (vec($rout, fileno($fh), 1)) { |
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| 313 | $_ = <$fh>; |
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| 314 | if (length($_)) { |
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| 315 | if ($sflag) { |
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| 316 | print STDOUT "$_"; |
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| 317 | } |
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| 318 | else { |
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| 319 | print STDOUT "$host: $_"; |
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| 320 | } |
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| 321 | } |
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| 322 | else { |
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| 323 | # EOF has been reached |
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| 324 | vec($rin, fileno($fh), 1) = 0; |
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| 325 | $num_fh--; |
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| 326 | close($fh); |
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| 327 | } |
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| 328 | } |
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| 329 | |
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| 330 | # Process STDERR I/O. |
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| 331 | $fh = $r_err{$host}; |
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| 332 | if (vec($rout, fileno($fh), 1)) { |
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| 333 | $_ = <$fh>; |
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| 334 | if (length($_)) { |
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| 335 | if ($sflag) { |
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| 336 | $stderr_array[$err_ctr] = $_; |
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| 337 | } |
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| 338 | else { |
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| 339 | $stderr_array[$err_ctr] = "$host: $_"; |
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| 340 | } |
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| 341 | $err_ctr++; |
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| 342 | $array_updated = 1; |
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| 343 | } |
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| 344 | else { |
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| 345 | # EOF has been reached |
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| 346 | vec($rin, fileno($fh), 1) = 0; |
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| 347 | $num_fh--; |
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| 348 | close($fh); |
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| 349 | } |
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| 350 | } |
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| 351 | } |
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| 352 | } |
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| 353 | |
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| 354 | # Reap any completed child process, in order to maintain fanout. |
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| 355 | if (($child_pid = waitpid(-1, &WNOHANG)) > 0) { |
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| 356 | |
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| 357 | # Obtain the return code and hostname for the child process. |
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| 358 | $child_rc = $? >> 8; |
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| 359 | foreach (keys %pid) { |
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| 360 | if ($pid{$_} == $child_pid) { |
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| 361 | $child_host = $_; |
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| 362 | last; |
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| 363 | } |
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| 364 | } |
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| 365 | |
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| 366 | # Process any outstanding STDOUT I/O for the deceased child. |
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| 367 | $fh = $r_out{$child_host}; |
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| 368 | if (fileno($fh) != undef) { |
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| 369 | do { |
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| 370 | $_ = <$fh>; |
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| 371 | if (length($_)) |
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| 372 | { |
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| 373 | if ($sflag) { |
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| 374 | print STDOUT "$_"; |
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| 375 | } |
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| 376 | else { |
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| 377 | print STDOUT "$child_host: $_"; |
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| 378 | } |
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| 379 | } |
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| 380 | } while (length($_)); |
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| 381 | |
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| 382 | # EOF has been reached |
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| 383 | vec($rin, fileno($fh), 1) = 0; |
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| 384 | $num_fh--; |
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| 385 | close($fh); |
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| 386 | } |
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| 387 | |
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| 388 | # Process any outstanding STDERR I/O for the deceased child. |
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| 389 | $fh = $r_err{$child_host}; |
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| 390 | if (fileno($fh) != undef) { |
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| 391 | do { |
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| 392 | $_ = <$fh>; |
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| 393 | if (length($_)) { |
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| 394 | if ($sflag) { |
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| 395 | $stderr_array[$err_ctr] = $_; |
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| 396 | } |
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| 397 | else { |
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| 398 | $stderr_array[$err_ctr] = "$child_host: $_"; |
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| 399 | } |
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| 400 | $err_ctr++; |
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| 401 | $array_updated = 1; |
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| 402 | } |
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| 403 | } while (length($_)); |
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| 404 | |
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| 405 | # EOF has been reached |
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| 406 | vec($rin, fileno($fh), 1) = 0; |
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| 407 | $num_fh--; |
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| 408 | close($fh); |
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| 409 | } |
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| 410 | |
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| 411 | if ($child_rc != 0) { |
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| 412 | if ($hostCount == 1) { |
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| 413 | $rcode = $child_rc; # Pass back child's rc to mmdsh caller |
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| 414 | } |
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| 415 | else { |
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| 416 | $rcode++; |
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| 417 | #print STDERR "mmdsh: $child_host rsh had exit code $child_rc\n"; |
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| 418 | &prtMsg(365, $child_host, $child_rc); |
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| 419 | } |
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| 420 | push(@goners,$child_host); |
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| 421 | } |
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| 422 | |
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| 423 | # Remove the deceased child from @hs so we don't continually try to add |
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| 424 | # it to the select vector as problems may occur with sufficiently large |
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| 425 | # numbers of nodes. |
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| 426 | $offset = 0; |
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| 427 | foreach $host (@hs) { |
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| 428 | if ($host eq $child_host) { |
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| 429 | splice(@hs, $offset, 1); |
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| 430 | last; |
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| 431 | } |
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| 432 | $offset++; |
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| 433 | } |
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| 434 | |
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| 435 | # Child terminated ==> decrement fanout |
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| 436 | $cur_fanout--; |
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| 437 | } |
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| 438 | |
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| 439 | if (($final_read eq true) && ($num_fh > 0) || |
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| 440 | ($cur_fanout >= $fanout)) { |
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| 441 | # Final pipes data retrieval ==> Wait/retrieve until all pipes closed |
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| 442 | redo READWAIT; |
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| 443 | } |
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| 444 | } |
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| 445 | } |
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| 446 | |
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| 447 | # Print out accumulated STDERR output. |
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| 448 | if ($array_updated) { |
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| 449 | for ($prt_ctr=0; $prt_ctr < $err_ctr; $prt_ctr++) { |
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| 450 | print STDERR "$stderr_array[$prt_ctr]"; |
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| 451 | } |
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| 452 | } |
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| 453 | |
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| 454 | } #---------- end of read_pipes_and_wait routine --------------------------- |
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| 455 | |
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| 456 | |
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| 457 | #---------------------------------------------------------------------------- |
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| 458 | # |
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| 459 | # get_command |
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| 460 | # |
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| 461 | # Return the command from the command line or stdin. |
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| 462 | # Return 0 if no more to be read from command line or stdin. |
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| 463 | # If the command is in double quotes, add a double quote to the beginning. |
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| 464 | # If the command starts with '!', execute here and read in the next command. |
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| 465 | # |
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| 466 | #---------------------------------------------------------------------------- |
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| 467 | |
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| 468 | sub get_command { |
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| 469 | |
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| 470 | local($command); |
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| 471 | if ($done) { |
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| 472 | return(0); |
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| 473 | } |
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| 474 | if (@ARGV) { |
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| 475 | $done = 1; |
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| 476 | @dsh_ARGV = @ARGV; |
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| 477 | shift(@ARGV); |
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| 478 | # |
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| 479 | # Save the arguments in a scalar. The return value |
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| 480 | # of this routine is assigned to a scalar variable. |
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| 481 | # |
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| 482 | $dsh_return = join(' ',@dsh_ARGV); |
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| 483 | return($dsh_return); |
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| 484 | } |
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| 485 | GET_COMMAND: { |
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| 486 | -t && print STDERR "mmdsh> "; |
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| 487 | $command = <STDIN>; |
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| 488 | if (!defined($command) || |
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| 489 | $command =~ /^\s*$/ || $command =~ /^\s*exit\s*$/) { |
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| 490 | return(0); |
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| 491 | } else { |
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| 492 | chop $command; |
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| 493 | # Add a double-quote to the beginning of the command if the user |
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| 494 | # entered the command with double-quotes. |
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| 495 | if ($command =~ /^\s*"(.*)/) { |
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| 496 | $command = '"' . $command; |
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| 497 | } |
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| 498 | if ($command =~ /^\s*!(.*)/) { |
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| 499 | &do_system($1); |
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| 500 | redo GET_COMMAND; |
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| 501 | } else { |
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| 502 | return($command) || redo GET_COMMAND; |
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| 503 | } |
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| 504 | } |
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| 505 | } |
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| 506 | |
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| 507 | } #---------- end of get_command routine ------------------------------ |
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| 508 | |
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| 509 | |
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| 510 | #---------------------------------------------------------------------------- |
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| 511 | # |
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| 512 | # do_system |
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| 513 | # |
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| 514 | # Issue system() call with default signal handling. |
---|
| 515 | # Return the executed command's exit code. |
---|
| 516 | # |
---|
| 517 | #---------------------------------------------------------------------------- |
---|
| 518 | |
---|
| 519 | sub do_system { |
---|
| 520 | |
---|
| 521 | local($command) = @_; |
---|
| 522 | local(%save_sig,$rc); |
---|
| 523 | %save_sig = %SIG; |
---|
| 524 | grep($_ = 'DEFAULT', %SIG); |
---|
| 525 | $rc = system("$command 2>&1") >> 8; |
---|
| 526 | %SIG = %save_sig; |
---|
| 527 | return($rc); |
---|
| 528 | |
---|
| 529 | } #---------- end of do_system routine --------------------------------- |
---|
| 530 | |
---|
| 531 | |
---|
| 532 | #---------------------------------------------------------------------------- |
---|
| 533 | # |
---|
| 534 | # display_help |
---|
| 535 | # |
---|
| 536 | # Display help information |
---|
| 537 | # |
---|
| 538 | #---------------------------------------------------------------------------- |
---|
| 539 | |
---|
| 540 | sub display_help { |
---|
| 541 | |
---|
| 542 | $usageMsg=" |
---|
| 543 | Usage: |
---|
| 544 | |
---|
| 545 | mmdsh [flags/parms] command |
---|
| 546 | |
---|
| 547 | Flags/parms: |
---|
| 548 | |
---|
| 549 | -f number fanout number to use for concurrent execution |
---|
| 550 | -F filename nodelist file listing nodes on which to execute command |
---|
| 551 | -I filename file to be staged on the remote node prior to executing |
---|
| 552 | command; the file must be in /var/mmfs/tmp |
---|
| 553 | -k remove the file specified with the -I flag before exiting |
---|
| 554 | -L n1,n2,n3 comma-separated list of nodes on which to execute command |
---|
| 555 | -N nodespec node specificaton that consists of a node list, a node file, |
---|
| 556 | or a node class on which to execute the command |
---|
| 557 | -s suppress the prepending of the hostname string to each line |
---|
| 558 | of output generated by running the command on the remote node |
---|
| 559 | -v verify that nodes are reachable before adding them to the |
---|
| 560 | set of nodes on which to run the command |
---|
| 561 | -i display the set of nodes on which the command will run |
---|
| 562 | before command execution |
---|
| 563 | "; |
---|
| 564 | print STDERR "$usageMsg\n"; |
---|
| 565 | |
---|
| 566 | } #---------- end of display_help routine ----------------------------- |
---|
| 567 | |
---|
| 568 | |
---|
| 569 | #---------------------------------------------------------------------------- |
---|
| 570 | # |
---|
| 571 | # add_wc |
---|
| 572 | # |
---|
| 573 | # Add a host to the working collective. |
---|
| 574 | # |
---|
| 575 | # Input parameter is the hostname to be added. |
---|
| 576 | # |
---|
| 577 | # Don't add a hostname if it is already in the working collective. |
---|
| 578 | # |
---|
| 579 | #---------------------------------------------------------------------------- |
---|
| 580 | |
---|
| 581 | sub add_wc { |
---|
| 582 | |
---|
| 583 | local($host) = @_; |
---|
| 584 | local($hostname); |
---|
| 585 | |
---|
| 586 | $host =~ s/\s//g; |
---|
| 587 | |
---|
| 588 | # If the host is already in the working collective, return to the caller |
---|
| 589 | # without adding it to the collective again (avoid redundancies). |
---|
| 590 | foreach $hostname (@wc) { |
---|
| 591 | return if $hostname eq $host; |
---|
| 592 | } |
---|
| 593 | |
---|
| 594 | # If we made it this far, add the host to the working collective. |
---|
| 595 | push(@wc,$host); |
---|
| 596 | |
---|
| 597 | } #---------- end of add_wc routine ------------------------------------ |
---|
| 598 | |
---|
| 599 | |
---|
| 600 | #---------------------------------------------------------------------------- |
---|
| 601 | # |
---|
| 602 | # add_wc_parallel |
---|
| 603 | # |
---|
| 604 | # Add hosts to the working collective in parallel via fork. |
---|
| 605 | # |
---|
| 606 | # Input parameter is the opened working collective file handle. |
---|
| 607 | # |
---|
| 608 | # If -v was specified, only add a host to the working collective |
---|
| 609 | # if it is reachable via ping, or if the user said to add it |
---|
| 610 | # even though it is not reachable. |
---|
| 611 | # |
---|
| 612 | # Don't add a hostname if it is already in the working collective. |
---|
| 613 | # |
---|
| 614 | #---------------------------------------------------------------------------- |
---|
| 615 | |
---|
| 616 | sub add_wc_parallel { |
---|
| 617 | |
---|
| 618 | local($filehandle) = @_; |
---|
| 619 | local(@hosts_seen, $child_host); |
---|
| 620 | |
---|
| 621 | # Unlink the temporary file here. Otherwise, it may be |
---|
| 622 | # left behind if we run into a problem and exit early. |
---|
| 623 | if ($hlfile) { |
---|
| 624 | `/bin/rm -f $hlfile`; |
---|
| 625 | } |
---|
| 626 | |
---|
| 627 | if ($fanout) { # set fanval from user value, environment, or default |
---|
| 628 | $fanval = $fanout; |
---|
| 629 | } else { |
---|
| 630 | unless ($fanval = $ENV{'FANOUT'}) { |
---|
| 631 | $fanval = $fanout_default; |
---|
| 632 | } |
---|
| 633 | } |
---|
| 634 | |
---|
| 635 | HOST: while ($host = <$filehandle>) { |
---|
| 636 | |
---|
| 637 | $host =~ /^\s*#/ && next; |
---|
| 638 | $host =~ /^\s*$/ && next; |
---|
| 639 | $host =~ /;/ && next; |
---|
| 640 | $host =~ /\S+\s+\S+/ && next; |
---|
| 641 | chop($host); |
---|
| 642 | |
---|
| 643 | # Remove any leading or trailing whitespace. |
---|
| 644 | ($host, $remainder) = split(" ", $host); |
---|
| 645 | |
---|
| 646 | # Prevent duplicates in the working collective. Duplicates are culled |
---|
| 647 | # here to prevent the key collisions in the %pid hashtable, which can |
---|
| 648 | # cause unexpected behavior. For example, defined, but empty hostnames |
---|
| 649 | # being added to the working collective, leading to "Unknown host" |
---|
| 650 | # messages from the remote shell during execution attempts. |
---|
| 651 | foreach (@hosts_seen) { |
---|
| 652 | if ($_ eq $host) { |
---|
| 653 | next HOST; |
---|
| 654 | } |
---|
| 655 | } |
---|
| 656 | push(@hosts_seen, $host); |
---|
| 657 | |
---|
| 658 | # Create filehandles for pipe ends. |
---|
| 659 | $Rout{$host} = "READ_STDOUT__" . $host; |
---|
| 660 | $Wout{$host} = "WRITE_STDOUT__" . $host; |
---|
| 661 | $Rerr{$host} = "READ_STDERR__" . $host; |
---|
| 662 | $Werr{$host} = "WRITE_STDERR__" . $host; |
---|
| 663 | |
---|
| 664 | # Open pipes for this host's stdout and stderr from ping. |
---|
| 665 | if (pipe($Rout{$host}, $Wout{$host}) < 0) { |
---|
| 666 | #die "mmdsh: Couldn't pipe: $!\n"; |
---|
| 667 | &prtMsg(368, "\'$!\'"); |
---|
| 668 | exit(-1); |
---|
| 669 | } |
---|
| 670 | if (pipe($Rerr{$host}, $Werr{$host}) < 0) { |
---|
| 671 | #die "mmdsh: Couldn't pipe: $!\n"; |
---|
| 672 | &prtMsg(368, "\'$!\'"); |
---|
| 673 | exit(-1); |
---|
| 674 | } |
---|
| 675 | |
---|
| 676 | # Fork a child to execute the ping to the current host to be added. |
---|
| 677 | ADDFORK: { |
---|
| 678 | |
---|
| 679 | if ($pid{$host} = fork) { |
---|
| 680 | |
---|
| 681 | # parent code - |
---|
| 682 | # close unneeded ends of pipes |
---|
| 683 | # parent will wait for child processes if fanout limit reached |
---|
| 684 | |
---|
| 685 | close($Wout{$host}); |
---|
| 686 | close($Werr{$host}); |
---|
| 687 | |
---|
| 688 | if (++$cur_fanout >= $fanval) { |
---|
| 689 | &wait_for_kids_and_add_hosts(false); |
---|
| 690 | } |
---|
| 691 | |
---|
| 692 | } elsif (defined $pid{$host}) { |
---|
| 693 | |
---|
| 694 | # child code - |
---|
| 695 | # close unneeded ends of pipes |
---|
| 696 | # redirect stdout and stderr to output pipes |
---|
| 697 | # exec the ping command |
---|
| 698 | # stdout/stderr will go to pipes to be read by parent |
---|
| 699 | |
---|
| 700 | close($Rout{$host}); |
---|
| 701 | close($Rerr{$host}); |
---|
| 702 | |
---|
| 703 | # If the -v flag was specified, check whether the host can be ping'd. |
---|
| 704 | # If the 1st ping fails, try a few more times to avoid false node down. |
---|
| 705 | if ($verify) { |
---|
| 706 | $pingCount = 0; |
---|
| 707 | $pingRc = 1; |
---|
| 708 | while ($pingRc != 0 && ++$pingCount <= $maxPingCount) { |
---|
| 709 | `$ping -w $pingTimeout -c 1 $host 2>/dev/null`; |
---|
| 710 | $pingRc = $? >> 8; |
---|
| 711 | if ($pingRc > 0 && $iflag) { |
---|
| 712 | printf STDERR "ping %s failed (%s); pingRc=%s\n", $host, $pingCount, $pingRc; |
---|
| 713 | } |
---|
| 714 | ++$pingTimeout; |
---|
| 715 | } |
---|
| 716 | } |
---|
| 717 | |
---|
| 718 | unless (open(STDOUT, ">&$Wout{$host}")) { |
---|
| 719 | #die "mmdsh: Cannot redirect STDOUT: $!\n"; |
---|
| 720 | &prtMsg(369, 'STDOUT', "\'$!\'"); |
---|
| 721 | exit(-1); |
---|
| 722 | } |
---|
| 723 | unless (open(STDERR, ">&$Werr{$host}")) { |
---|
| 724 | #die "mmdsh: Cannot redirect STDERR: $!\n"; |
---|
| 725 | &prtMsg(369, 'STDERR', "\'$!\'"); |
---|
| 726 | exit(-1); |
---|
| 727 | } |
---|
| 728 | |
---|
| 729 | select(STDOUT); $| = 1; |
---|
| 730 | select(STDERR); $| = 1; |
---|
| 731 | |
---|
| 732 | exit($pingRc); |
---|
| 733 | |
---|
| 734 | } else { |
---|
| 735 | |
---|
| 736 | # Try again. The fork must have failed due to a resource problem. |
---|
| 737 | |
---|
| 738 | sleep 5; |
---|
| 739 | redo ADDFORK; |
---|
| 740 | } |
---|
| 741 | } |
---|
| 742 | } |
---|
| 743 | |
---|
| 744 | # Parent continues here after forking all the children for this command. |
---|
| 745 | # Get the results of any remaining ping's (the number of hosts in the |
---|
| 746 | # working collective may not be a multiple of the fanout value). |
---|
| 747 | # Get rid of any hosts that have failed, reporting all removed hosts as |
---|
| 748 | # directed by the [-R reportfile] and [-r] flags. |
---|
| 749 | &wait_for_kids_and_add_hosts(true); |
---|
| 750 | if ($reportFile && ($#goners >= 0)) { |
---|
| 751 | # Write removed hosts to specified file. The file is not created if |
---|
| 752 | # the goners array is empty (i.e., $#goners = -1). |
---|
| 753 | open(REPORTFILE, ">$reportFile"); |
---|
| 754 | foreach $child_host (@goners) { |
---|
| 755 | print REPORTFILE "$child_host\n"; |
---|
| 756 | } |
---|
| 757 | close(REPORTFILE); |
---|
| 758 | } |
---|
| 759 | if ($rflag) { |
---|
| 760 | # Write removed hosts to standard error. |
---|
| 761 | foreach $child_host (@goners) { |
---|
| 762 | print STDERR "$child_host\n"; |
---|
| 763 | } |
---|
| 764 | } |
---|
| 765 | &delete_hosts; |
---|
| 766 | unless ($done) { |
---|
| 767 | $cur_fanout = 0; |
---|
| 768 | &check_wc; |
---|
| 769 | } |
---|
| 770 | |
---|
| 771 | } #---------- end of add_wc_parallel routine ---------------------------- |
---|
| 772 | |
---|
| 773 | |
---|
| 774 | #---------------------------------------------------------------------------- |
---|
| 775 | # |
---|
| 776 | # parse |
---|
| 777 | # |
---|
| 778 | # Parse the command line. |
---|
| 779 | # |
---|
| 780 | #---------------------------------------------------------------------------- |
---|
| 781 | |
---|
| 782 | sub parse { |
---|
| 783 | |
---|
| 784 | local(@indices,@temp,$Findex,$findex,$Iindex,$Lindex,$Nindex); |
---|
| 785 | local($fn,$wfile,$host,@hostlist,$ht,$hl,$Narg,$nodesToUse); |
---|
| 786 | |
---|
| 787 | if ($ARGV[0] eq "-\?") { |
---|
| 788 | &display_help; |
---|
| 789 | exit; |
---|
| 790 | } |
---|
| 791 | |
---|
| 792 | while ($ARGV[0] =~ /^-/) { # while current parm starts with "-" |
---|
| 793 | |
---|
| 794 | if ($ARGV[0] =~ /[FfILNR](\S+)/) { # if flag is one of F, f, I, L, N, or R |
---|
| 795 | # and there is no whitespace |
---|
| 796 | # immediately after the flag |
---|
| 797 | $Findex = index($ARGV[0],"F"); |
---|
| 798 | $findex = index($ARGV[0],"f"); |
---|
| 799 | $Iindex = index($ARGV[0],"I"); |
---|
| 800 | $Lindex = index($ARGV[0],"L"); |
---|
| 801 | $Nindex = index($ARGV[0],"N"); |
---|
| 802 | $Rindex = index($ARGV[0],"R"); |
---|
| 803 | @indices = ($Findex, $findex, $Iindex, $Lindex, $Nindex, $Rindex); |
---|
| 804 | |
---|
| 805 | @indices = sort @indices; |
---|
| 806 | @temp = @indices; |
---|
| 807 | foreach (@temp) { # loop moves parm pos value to indices[0] |
---|
| 808 | $_ == -1 && shift(@indices); |
---|
| 809 | } |
---|
| 810 | |
---|
| 811 | if ($indices[0] == $Findex) { # if the flag was "F" |
---|
| 812 | if (!$fn) { |
---|
| 813 | $fn = $1; |
---|
| 814 | unless ($wfile = $fn) { |
---|
| 815 | #die "mmdsh: Missing argument\n"; |
---|
| 816 | &prtMsg(204, "-F"); |
---|
| 817 | &display_help; |
---|
| 818 | exit(-1); |
---|
| 819 | } |
---|
| 820 | } else { |
---|
| 821 | #die "mmdsh: F flag specified twice.\n"; |
---|
| 822 | &prtMsg(36, "F"); |
---|
| 823 | &display_help; |
---|
| 824 | exit(-1); |
---|
| 825 | } |
---|
| 826 | |
---|
| 827 | } elsif ($indices[0] == $findex) { # if the flag was "f" |
---|
| 828 | if (!$fanout) { |
---|
| 829 | $fanout = $1; |
---|
| 830 | if ($fanout =~ /\D/) { |
---|
| 831 | #die "mmdsh: Incorrect argument - $fanout\n"; |
---|
| 832 | &prtMsg(40, "-f", $fanout); |
---|
| 833 | &display_help; |
---|
| 834 | exit(-1); |
---|
| 835 | } |
---|
| 836 | } else { |
---|
| 837 | #die "mmdsh: f flag specified twice.\n"; |
---|
| 838 | &prtMsg(36, "f"); |
---|
| 839 | &display_help; |
---|
| 840 | exit(-1); |
---|
| 841 | } |
---|
| 842 | |
---|
| 843 | } elsif ($indices[0] == $Iindex) { # if the flag was "I" |
---|
| 844 | if (!$stageFile) { |
---|
| 845 | $stageFile = $1; |
---|
| 846 | unless ($fileToCopy = $stageFile) { |
---|
| 847 | #die "mmdsh: Missing argument\n"; |
---|
| 848 | &prtMsg(204, "-I"); |
---|
| 849 | &display_help; |
---|
| 850 | exit(-1); |
---|
| 851 | } |
---|
| 852 | } elsif (!$stageFile2) { |
---|
| 853 | $stageFile2 = $1; |
---|
| 854 | unless ($fileToCopy2 = $stageFile2) { |
---|
| 855 | #die "mmdsh: Missing argument\n"; |
---|
| 856 | &prtMsg(204, "-I"); |
---|
| 857 | &display_help; |
---|
| 858 | exit(-1); |
---|
| 859 | } |
---|
| 860 | } else { |
---|
| 861 | #die "mmdsh: I flag specified twice.\n"; |
---|
| 862 | &prtMsg(36, "I"); |
---|
| 863 | &display_help; |
---|
| 864 | exit(-1); |
---|
| 865 | } |
---|
| 866 | |
---|
| 867 | } elsif ($indices[0] == $Lindex) { # if the flag was "L" |
---|
| 868 | if (!$hl) { |
---|
| 869 | $hl = $1; |
---|
| 870 | if ($hl =~ /^,|,,|,$/) { |
---|
| 871 | #die "Incorrect argument - $hl\n"; |
---|
| 872 | &prtMsg(153, "-L"); |
---|
| 873 | &display_help; |
---|
| 874 | exit(-1); |
---|
| 875 | } |
---|
| 876 | if ($hl eq "-") { |
---|
| 877 | # Get names from stdin |
---|
| 878 | while (<STDIN>) { |
---|
| 879 | /^\s*#/ && next; |
---|
| 880 | /^\s*$/ && next; |
---|
| 881 | /;/ && next; |
---|
| 882 | /\S+ \S+/ && next; |
---|
| 883 | s/ //g; |
---|
| 884 | chop; |
---|
| 885 | push(@hostlist,$_); |
---|
| 886 | } |
---|
| 887 | } else { |
---|
| 888 | @hostlist = split(/,/,$hl); |
---|
| 889 | } |
---|
| 890 | } else { |
---|
| 891 | #die "mmdsh: L flag specified twice.\n"; |
---|
| 892 | &prtMsg(36, "L"); |
---|
| 893 | &display_help; |
---|
| 894 | exit(-1); |
---|
| 895 | } |
---|
| 896 | |
---|
| 897 | } elsif ($indices[0] == $Nindex) { # if the flag was "N" |
---|
| 898 | if (!$Narg) { |
---|
| 899 | $Narg = $1; |
---|
| 900 | unless ($nodesToUse = $Narg) { |
---|
| 901 | #die "mmdsh: Missing argument\n"; |
---|
| 902 | &prtMsg(204, "-N"); |
---|
| 903 | &display_help; |
---|
| 904 | exit(-1); |
---|
| 905 | } |
---|
| 906 | } else { |
---|
| 907 | #die "mmdsh: N flag specified twice.\n"; |
---|
| 908 | &prtMsg(36, "N"); |
---|
| 909 | &display_help; |
---|
| 910 | exit(-1); |
---|
| 911 | } |
---|
| 912 | |
---|
| 913 | } elsif ($indices[0] == $Rindex) { # if the flag was "R" |
---|
| 914 | if (!$reportFile) { |
---|
| 915 | unless ($reportFile = $1) { |
---|
| 916 | #die "mmdsh: Missing argument\n"; |
---|
| 917 | &prtMsg(204, "-R"); |
---|
| 918 | &display_help; |
---|
| 919 | exit(-1); |
---|
| 920 | } |
---|
| 921 | } else { |
---|
| 922 | #die "mmdsh: R flag specified twice.\n"; |
---|
| 923 | &prtMsg(36, "R"); |
---|
| 924 | &display_help; |
---|
| 925 | exit(-1); |
---|
| 926 | } |
---|
| 927 | } |
---|
| 928 | $ARGV[0] = substr($ARGV[0], 0, $indices[0] + 1); |
---|
| 929 | |
---|
| 930 | } elsif ($ARGV[0] =~ /F$/) { # otherwise, if the flag is an "F" |
---|
| 931 | # followed by whitespace |
---|
| 932 | if (!$fn) { |
---|
| 933 | $fn = $ARGV[1]; |
---|
| 934 | unless ($wfile = $fn) { |
---|
| 935 | #die "mmdsh: Missing argument\n"; |
---|
| 936 | &prtMsg(204, "-F"); |
---|
| 937 | &display_help; |
---|
| 938 | exit(-1); |
---|
| 939 | } |
---|
| 940 | $shiftflag++; |
---|
| 941 | } else { |
---|
| 942 | #die "mmdsh: F flag specified twice.\n"; |
---|
| 943 | &prtMsg(36, "F"); |
---|
| 944 | &display_help; |
---|
| 945 | exit(-1); |
---|
| 946 | } |
---|
| 947 | |
---|
| 948 | } elsif ($ARGV[0] =~ /f$/) { # otherwise, if the flag is an "f" |
---|
| 949 | # followed by whitespace |
---|
| 950 | if (!$fanout) { |
---|
| 951 | $fanout = $ARGV[1]; |
---|
| 952 | unless ($fanout) { |
---|
| 953 | #die "mmdsh: Missing argument\n"; |
---|
| 954 | &prtMsg(204, "-f"); |
---|
| 955 | &display_help; |
---|
| 956 | exit(-1); |
---|
| 957 | } |
---|
| 958 | if ($fanout =~ /\D/) { |
---|
| 959 | #die "mmdsh: Incorrect argument - $fanout\n"; |
---|
| 960 | &prtMsg(40, "-f", $fanout); |
---|
| 961 | &display_help; |
---|
| 962 | exit(-1); |
---|
| 963 | } |
---|
| 964 | $shiftflag++; |
---|
| 965 | } else { |
---|
| 966 | #die "mmdsh: f flag specified twice.\n"; |
---|
| 967 | &prtMsg(36, "f"); |
---|
| 968 | &display_help; |
---|
| 969 | exit(-1); |
---|
| 970 | } |
---|
| 971 | |
---|
| 972 | } elsif ($ARGV[0] =~ /I$/) { # otherwise, if the flag is an "I" |
---|
| 973 | # followed by whitespace |
---|
| 974 | if (!$stageFile) { |
---|
| 975 | $stageFile = $ARGV[1]; |
---|
| 976 | unless ($fileToCopy = $stageFile) { |
---|
| 977 | #die "mmdsh: Missing argument\n"; |
---|
| 978 | &prtMsg(204, "-I"); |
---|
| 979 | &display_help; |
---|
| 980 | exit(-1); |
---|
| 981 | } |
---|
| 982 | $shiftflag++; |
---|
| 983 | } elsif (!$stageFile2) { |
---|
| 984 | $stageFile2 = $ARGV[1]; |
---|
| 985 | unless ($fileToCopy2 = $stageFile2) { |
---|
| 986 | #die "mmdsh: Missing argument\n"; |
---|
| 987 | &prtMsg(204, "-I"); |
---|
| 988 | &display_help; |
---|
| 989 | exit(-1); |
---|
| 990 | } |
---|
| 991 | $shiftflag++; |
---|
| 992 | } else { |
---|
| 993 | #die "mmdsh: I flag specified twice.\n"; |
---|
| 994 | &prtMsg(36, "I"); |
---|
| 995 | &display_help; |
---|
| 996 | exit(-1); |
---|
| 997 | } |
---|
| 998 | |
---|
| 999 | } elsif ($ARGV[0] =~ /L$/) { # otherwise, if the flag is an "L" |
---|
| 1000 | # followed by whitespace |
---|
| 1001 | if (!$hl) { |
---|
| 1002 | $hl = $ARGV[1]; |
---|
| 1003 | unless ($hl) { |
---|
| 1004 | #die "mmdsh: Missing argument\n"; |
---|
| 1005 | &prtMsg(204, "-L"); |
---|
| 1006 | &display_help; |
---|
| 1007 | exit(-1); |
---|
| 1008 | } |
---|
| 1009 | if ($hl =~ /^,|,,|,$/) { |
---|
| 1010 | #die "Incorrect argument - $hl\n"; |
---|
| 1011 | &prtMsg(153, "-L"); |
---|
| 1012 | &display_help; |
---|
| 1013 | exit(-1); |
---|
| 1014 | } |
---|
| 1015 | if ($hl eq "-") { |
---|
| 1016 | while (<STDIN>) { |
---|
| 1017 | /^\s*#/ && next; |
---|
| 1018 | /^\s*$/ && next; |
---|
| 1019 | /;/ && next; |
---|
| 1020 | /\S+ \S+/ && next; |
---|
| 1021 | s/ //g; |
---|
| 1022 | chop; |
---|
| 1023 | push(@hostlist,$_); |
---|
| 1024 | } |
---|
| 1025 | } else { |
---|
| 1026 | @hostlist = split(/,/,$hl); |
---|
| 1027 | } |
---|
| 1028 | $shiftflag++; |
---|
| 1029 | } else { |
---|
| 1030 | #die "mmdsh: L flag specified twice.\n"; |
---|
| 1031 | &prtMsg(36, "L"); |
---|
| 1032 | &display_help; |
---|
| 1033 | exit(-1); |
---|
| 1034 | } |
---|
| 1035 | |
---|
| 1036 | } elsif ($ARGV[0] =~ /N$/) { # otherwise, if the flag is an "N" |
---|
| 1037 | # followed by whitespace |
---|
| 1038 | if (!$Narg) { |
---|
| 1039 | $Narg = $ARGV[1]; |
---|
| 1040 | unless ($nodesToUse = $Narg) { |
---|
| 1041 | #die "mmdsh: Missing argument\n"; |
---|
| 1042 | &prtMsg(204, "-N"); |
---|
| 1043 | &display_help; |
---|
| 1044 | exit(-1); |
---|
| 1045 | } |
---|
| 1046 | $shiftflag++; |
---|
| 1047 | } else { |
---|
| 1048 | #die "mmdsh: N flag specified twice.\n"; |
---|
| 1049 | &prtMsg(36, "N"); |
---|
| 1050 | &display_help; |
---|
| 1051 | exit(-1); |
---|
| 1052 | } |
---|
| 1053 | |
---|
| 1054 | } elsif ($ARGV[0] =~ /R$/) { # otherwise, if the flag is an "R" |
---|
| 1055 | # followed by whitespace |
---|
| 1056 | if (!$reportFile) { |
---|
| 1057 | unless ($reportFile = $ARGV[1]) { |
---|
| 1058 | #die "mmdsh: Missing argument\n"; |
---|
| 1059 | &prtMsg(204, "-R"); |
---|
| 1060 | &display_help; |
---|
| 1061 | exit(-1); |
---|
| 1062 | } |
---|
| 1063 | $shiftflag++; |
---|
| 1064 | } else { |
---|
| 1065 | #die "mmdsh: R flag specified twice.\n"; |
---|
| 1066 | &prtMsg(36, "R"); |
---|
| 1067 | &display_help; |
---|
| 1068 | exit(-1); |
---|
| 1069 | } |
---|
| 1070 | } # end of if ($ARGV[0] =~ /[FfILNR](\S+)/) |
---|
| 1071 | |
---|
| 1072 | if (index($ARGV[0], 'i') >= $[) { # if there is an "i" flag present |
---|
| 1073 | if (rindex($ARGV[0], 'i') == index($ARGV[0], 'i')) { |
---|
| 1074 | if ($iflag++) { |
---|
| 1075 | #die "mmdsh: i flag specified twice.\n"; |
---|
| 1076 | &prtMsg(36, "i"); |
---|
| 1077 | &display_help; |
---|
| 1078 | exit(-1); |
---|
| 1079 | } |
---|
| 1080 | } else { |
---|
| 1081 | #die "mmdsh: i flag specified twice.\n"; |
---|
| 1082 | &prtMsg(36, "i"); |
---|
| 1083 | &display_help; |
---|
| 1084 | exit(-1); |
---|
| 1085 | } |
---|
| 1086 | } |
---|
| 1087 | |
---|
| 1088 | if (index($ARGV[0], 'k') >= $[) { # if there is a "k" flag present |
---|
| 1089 | if (rindex($ARGV[0], 'k') == index($ARGV[0], 'k')) { |
---|
| 1090 | if ($kflag++) { |
---|
| 1091 | #die "mmdsh: k flag specified twice.\n"; |
---|
| 1092 | &prtMsg(36, "k"); |
---|
| 1093 | &display_help; |
---|
| 1094 | exit(-1); |
---|
| 1095 | } |
---|
| 1096 | } else { |
---|
| 1097 | #die "mmdsh: k flag specified twice.\n"; |
---|
| 1098 | &prtMsg(36, "k"); |
---|
| 1099 | &display_help; |
---|
| 1100 | exit(-1); |
---|
| 1101 | } |
---|
| 1102 | } |
---|
| 1103 | |
---|
| 1104 | if (index($ARGV[0], 'r') >= $[) { # if there is an "r" flag present |
---|
| 1105 | if (rindex($ARGV[0], 'r') == index($ARGV[0], 'r')) { |
---|
| 1106 | if ($rflag++) { |
---|
| 1107 | #die "mmdsh: r flag specified twice.\n"; |
---|
| 1108 | &prtMsg(36, "r"); |
---|
| 1109 | &display_help; |
---|
| 1110 | exit(-1); |
---|
| 1111 | } |
---|
| 1112 | } else { |
---|
| 1113 | #die "mmdsh: r flag specified twice.\n"; |
---|
| 1114 | &prtMsg(36, "r"); |
---|
| 1115 | &display_help; |
---|
| 1116 | exit(-1); |
---|
| 1117 | } |
---|
| 1118 | } |
---|
| 1119 | |
---|
| 1120 | if (index($ARGV[0], 's') >= $[) { # if there is an "s" flag present |
---|
| 1121 | if (rindex($ARGV[0], 's') == index($ARGV[0], 's')) { |
---|
| 1122 | if ($sflag++) { |
---|
| 1123 | #die "mmdsh: s flag specified twice.\n"; |
---|
| 1124 | &prtMsg(36, "s"); |
---|
| 1125 | &display_help; |
---|
| 1126 | exit(-1); |
---|
| 1127 | } |
---|
| 1128 | } else { |
---|
| 1129 | #die "mmdsh: s flag specified twice.\n"; |
---|
| 1130 | &prtMsg(36, "s"); |
---|
| 1131 | &display_help; |
---|
| 1132 | exit(-1); |
---|
| 1133 | } |
---|
| 1134 | } |
---|
| 1135 | |
---|
| 1136 | if (index($ARGV[0], 'v') >= $[) { # if there is a "v" flag present |
---|
| 1137 | if (rindex($ARGV[0], 'v') == index($ARGV[0], 'v')) { |
---|
| 1138 | if ($verify++) { |
---|
| 1139 | #die "mmdsh: v flag specified twice.\n"; |
---|
| 1140 | &prtMsg(36, "v"); |
---|
| 1141 | &display_help; |
---|
| 1142 | exit(-1); |
---|
| 1143 | } |
---|
| 1144 | } else { |
---|
| 1145 | #die "mmdsh: v flag specified twice.\n"; |
---|
| 1146 | &prtMsg(36, "v"); |
---|
| 1147 | &display_help; |
---|
| 1148 | exit(-1); |
---|
| 1149 | } |
---|
| 1150 | } |
---|
| 1151 | |
---|
| 1152 | if ($ARGV[0] =~ /^-.*([^fFiIkLNRrsv]).*/) { # fail if any unknown flags |
---|
| 1153 | #die "mmdsh: Incorrect option - $1\n"; |
---|
| 1154 | &prtMsg(13, $1); |
---|
| 1155 | &display_help; |
---|
| 1156 | exit(-1); |
---|
| 1157 | } |
---|
| 1158 | |
---|
| 1159 | if ($ARGV[0] =~ /^-$/) { # fail if no flag after "-" |
---|
| 1160 | #die "mmdsh: Missing option\n"; |
---|
| 1161 | &prtMsg(168); |
---|
| 1162 | &display_help; |
---|
| 1163 | exit(-1); |
---|
| 1164 | } |
---|
| 1165 | |
---|
| 1166 | shift(@ARGV); # shift to next parameter |
---|
| 1167 | if ($shiftflag) { |
---|
| 1168 | shift(@ARGV); # shift again if parameter pertains to previous flag |
---|
| 1169 | $shiftflag--; # reset the shift flag |
---|
| 1170 | } |
---|
| 1171 | } |
---|
| 1172 | |
---|
| 1173 | # Process any hosts that were specified via the -L flag. |
---|
| 1174 | if (@hostlist) { |
---|
| 1175 | $wfound++; |
---|
| 1176 | # If the -v flag was specified, call routine to |
---|
| 1177 | # only add pingable hosts; otherwise, add them all. |
---|
| 1178 | if ($verify) { |
---|
| 1179 | # Put the hosts specified by the "L" flag into a temporary file. |
---|
| 1180 | $hlfile = "/var/mmfs/tmp/hostlistFile.mmdsh.$$"; |
---|
| 1181 | open(HLFILE, ">$hlfile"); |
---|
| 1182 | foreach $ht (@hostlist) { |
---|
| 1183 | print HLFILE "$ht\n"; |
---|
| 1184 | $hostCount++; |
---|
| 1185 | $targetHost = $ht; |
---|
| 1186 | } |
---|
| 1187 | close(HLFILE); |
---|
| 1188 | |
---|
| 1189 | # Pass the created file to routine that only adds pingable hosts. |
---|
| 1190 | # The temp file is cleaned up inside the add_wc_parallel routine. |
---|
| 1191 | unless (open(HLFILE, "$hlfile")) { |
---|
| 1192 | #die "mmdsh: Cannot open hostlist file $hlfile: $!\n"; |
---|
| 1193 | &prtMsg(364, $hlfile, "\'$!\'"); |
---|
| 1194 | `/bin/rm -f $hlfile`; |
---|
| 1195 | exit(-1); |
---|
| 1196 | } |
---|
| 1197 | &add_wc_parallel(HLFILE); |
---|
| 1198 | close(HLFILE); |
---|
| 1199 | `/bin/rm -f $hlfile`; |
---|
| 1200 | |
---|
| 1201 | } else { |
---|
| 1202 | foreach $ht (@hostlist) { # add any hosts specified by the "L" flag |
---|
| 1203 | &add_wc($ht); |
---|
| 1204 | $hostCount++; |
---|
| 1205 | $targetHost = $ht; |
---|
| 1206 | } |
---|
| 1207 | } |
---|
| 1208 | } |
---|
| 1209 | |
---|
| 1210 | # Process any hosts that were specified via the -F flag. |
---|
| 1211 | if ($wfile) { |
---|
| 1212 | $wfound++; |
---|
| 1213 | unless (open(WCFILE, $wfile)) { |
---|
| 1214 | #die "mmdsh: Cannot open working collective file $wfile: $!\n"; |
---|
| 1215 | &prtMsg(364, $wfile, "\'$!\'"); |
---|
| 1216 | exit(-1); |
---|
| 1217 | } |
---|
| 1218 | # If the -v flag was specified, call routine to |
---|
| 1219 | # only add pingable hosts; otherwise, add them all. |
---|
| 1220 | if ($verify) { |
---|
| 1221 | &add_wc_parallel(WCFILE); |
---|
| 1222 | } else { |
---|
| 1223 | while ($new_host = <WCFILE>) { |
---|
| 1224 | $new_host =~ /^\s*#/ && next; |
---|
| 1225 | $new_host =~ /^\s*$/ && next; |
---|
| 1226 | $new_host =~ /;/ && next; |
---|
| 1227 | $new_host =~ /\S+\s+\S+/ && next; |
---|
| 1228 | chop($new_host); |
---|
| 1229 | &add_wc($new_host); |
---|
| 1230 | } |
---|
| 1231 | } |
---|
| 1232 | close(WCFILE); |
---|
| 1233 | } |
---|
| 1234 | |
---|
| 1235 | # Process any nodes that were specified via the -N flag. |
---|
| 1236 | if ($nodesToUse) { |
---|
| 1237 | # Convert the node specification into a verified file of nodes. |
---|
| 1238 | $hlfile = "/var/mmfs/tmp/hostlistFile.mmdsh.$$"; |
---|
| 1239 | $cmd = "$MMCOMMON run createVerifiedNodefile $nodesToUse $REL_HOSTNAME_Field no $hlfile"; |
---|
| 1240 | if ($rc = system($cmd)) |
---|
| 1241 | { |
---|
| 1242 | $rc = &normalizeRC($rc); |
---|
| 1243 | &prtMsg(206, $rc); |
---|
| 1244 | `/bin/rm -f $hlfile`; |
---|
| 1245 | exit(-1); |
---|
| 1246 | } |
---|
| 1247 | |
---|
| 1248 | # Process the nodes in the file that was created. |
---|
| 1249 | if ($hlfile) { |
---|
| 1250 | $wfound++; |
---|
| 1251 | unless (open(HLFILE, $hlfile)) { |
---|
| 1252 | #die "mmdsh: Cannot open node file $hlfile: $!\n"; |
---|
| 1253 | &prtMsg(364, $hlfile, "\'$!\'"); |
---|
| 1254 | exit(-1); |
---|
| 1255 | } |
---|
| 1256 | # If the -v flag was specified, call routine to |
---|
| 1257 | # only add pingable hosts; otherwise, add them all. |
---|
| 1258 | if ($verify) { |
---|
| 1259 | &add_wc_parallel(HLFILE); |
---|
| 1260 | } else { |
---|
| 1261 | while ($new_host = <HLFILE>) { |
---|
| 1262 | $new_host =~ /^\s*#/ && next; |
---|
| 1263 | $new_host =~ /^\s*$/ && next; |
---|
| 1264 | $new_host =~ /;/ && next; |
---|
| 1265 | $new_host =~ /\S+\s+\S+/ && next; |
---|
| 1266 | chop($new_host); |
---|
| 1267 | &add_wc($new_host); |
---|
| 1268 | } |
---|
| 1269 | } |
---|
| 1270 | close(HLFILE); |
---|
| 1271 | `/bin/rm -f $hlfile`; |
---|
| 1272 | } |
---|
| 1273 | } |
---|
| 1274 | |
---|
| 1275 | # Verify the files to be staged exist and are in a subdir of /var/mmfs. |
---|
| 1276 | if ($stageFile) { |
---|
| 1277 | unless ( $fileToCopy =~ /^\/var\/mmfs\//) { |
---|
| 1278 | die "mmdsh: Files may only be copied to /var/mmfs.\n"; |
---|
| 1279 | } |
---|
| 1280 | unless ( -f $fileToCopy ) { |
---|
| 1281 | #die "mmdsh: File $fileToCopy not found\n"; |
---|
| 1282 | &prtMsg(364, $fileToCopy, "\'$!\'"); |
---|
| 1283 | exit(-1); |
---|
| 1284 | } |
---|
| 1285 | } |
---|
| 1286 | |
---|
| 1287 | if ($stageFile2) { |
---|
| 1288 | unless ( $fileToCopy2 =~ /^\/var\/mmfs\//) { |
---|
| 1289 | die "mmdsh: Files may only be copied to /var/mmfs.\n"; |
---|
| 1290 | } |
---|
| 1291 | unless ( -f $fileToCopy2 ) { |
---|
| 1292 | #die "mmdsh: File $fileToCopy2 not found\n"; |
---|
| 1293 | &prtMsg(364, $fileToCopy2, "\'$!\'"); |
---|
| 1294 | exit(-1); |
---|
| 1295 | } |
---|
| 1296 | } |
---|
| 1297 | |
---|
| 1298 | } #---------- end of parse routine ------------------------------------ |
---|
| 1299 | |
---|
| 1300 | |
---|
| 1301 | #---------------------------------------------------------------------------- |
---|
| 1302 | # |
---|
| 1303 | # set_defaults |
---|
| 1304 | # |
---|
| 1305 | # Set default values for those values that have not been specified. |
---|
| 1306 | # If fanout was not specified, it is set to the default fanout value. |
---|
| 1307 | # If login name was not specified, it is set to that of the current user. |
---|
| 1308 | # |
---|
| 1309 | #---------------------------------------------------------------------------- |
---|
| 1310 | |
---|
| 1311 | sub set_defaults { |
---|
| 1312 | |
---|
| 1313 | unless ($fanout) { |
---|
| 1314 | unless ($fanout = $ENV{'FANOUT'}) { |
---|
| 1315 | $fanout = $fanout_default; |
---|
| 1316 | } |
---|
| 1317 | } |
---|
| 1318 | unless ($login) { |
---|
| 1319 | $login = (getpwuid($<))[0]; |
---|
| 1320 | } |
---|
| 1321 | |
---|
| 1322 | } #---------- end of set_defaults routine ----------------------------- |
---|
| 1323 | |
---|
| 1324 | |
---|
| 1325 | #---------------------------------------------------------------------------- |
---|
| 1326 | # |
---|
| 1327 | # readem |
---|
| 1328 | # |
---|
| 1329 | # Read the stdout and stderr pipes for all hosts in the current fanout. |
---|
| 1330 | # |
---|
| 1331 | #---------------------------------------------------------------------------- |
---|
| 1332 | |
---|
| 1333 | sub readem { |
---|
| 1334 | |
---|
| 1335 | local(@h) = @_; |
---|
| 1336 | local($host); |
---|
| 1337 | foreach $host (@h) { |
---|
| 1338 | &read_pipes_and_wait(true, $host); |
---|
| 1339 | } |
---|
| 1340 | @h = (); |
---|
| 1341 | |
---|
| 1342 | } #---------- end of readem routine --------------------------------- |
---|
| 1343 | |
---|
| 1344 | |
---|
| 1345 | #---------------------------------------------------------------------------- |
---|
| 1346 | # |
---|
| 1347 | # display_wc |
---|
| 1348 | # |
---|
| 1349 | # If requested by means of the -i option, display the set of nodes |
---|
| 1350 | # on which the command will be run. |
---|
| 1351 | # |
---|
| 1352 | #---------------------------------------------------------------------------- |
---|
| 1353 | |
---|
| 1354 | sub display_wc { |
---|
| 1355 | |
---|
| 1356 | local($i); |
---|
| 1357 | if ($iflag) { |
---|
| 1358 | #print STDOUT "Nodes on which the command will be run:\n"; |
---|
| 1359 | &prtMsg(362); |
---|
| 1360 | $i = 0; |
---|
| 1361 | while ($i <= $#wc) { |
---|
| 1362 | printf STDERR "%-19.18s", $wc[$i]; |
---|
| 1363 | printf STDERR "%-19.18s", $wc[$i+1]; |
---|
| 1364 | printf STDERR "%-19.18s", $wc[$i+2]; |
---|
| 1365 | printf STDERR "%-19.18s\n", $wc[$i+3]; |
---|
| 1366 | $i = $i + 4; |
---|
| 1367 | } |
---|
| 1368 | } |
---|
| 1369 | |
---|
| 1370 | } #---------- end of display_wc routine ------------------------------- |
---|
| 1371 | |
---|
| 1372 | |
---|
| 1373 | #---------------------------------------------------------------------------- |
---|
| 1374 | # |
---|
| 1375 | # get_wc |
---|
| 1376 | # |
---|
| 1377 | # Determine the working collective, if not already obtained from command line. |
---|
| 1378 | # Look for filename in $WCOLL containing the hostnames, one per line. |
---|
| 1379 | # |
---|
| 1380 | #---------------------------------------------------------------------------- |
---|
| 1381 | |
---|
| 1382 | sub get_wc { |
---|
| 1383 | |
---|
| 1384 | local($wfile,$new_host); |
---|
| 1385 | if (!@wc && !$wfound) { |
---|
| 1386 | unless ($wfile = $ENV{'WCOLL'}) { |
---|
| 1387 | #die "mmdsh: Working collective environment variable not set\n"; |
---|
| 1388 | &prtMsg(363); |
---|
| 1389 | exit(-1); |
---|
| 1390 | } |
---|
| 1391 | unless (open(WCFILE, $wfile)) { |
---|
| 1392 | #die "mmdsh: Cannot open working collective file $wfile: $!\n"; |
---|
| 1393 | &prtMsg(364, $wfile, "\'$!\'"); |
---|
| 1394 | exit(-1); |
---|
| 1395 | } |
---|
| 1396 | if ($verify) { |
---|
| 1397 | &add_wc_parallel(WCFILE); |
---|
| 1398 | } else { |
---|
| 1399 | while ($new_host = <WCFILE>) { |
---|
| 1400 | $new_host =~ /^\s*#/ && next; |
---|
| 1401 | $new_host =~ /^\s*$/ && next; |
---|
| 1402 | $new_host =~ /;/ && next; |
---|
| 1403 | $new_host =~ /\S+\s+\S+/ && next; |
---|
| 1404 | chop($new_host); |
---|
| 1405 | &add_wc($new_host); |
---|
| 1406 | } |
---|
| 1407 | } |
---|
| 1408 | close(WCFILE); |
---|
| 1409 | } |
---|
| 1410 | |
---|
| 1411 | } #---------- end of get_wc routine ----------------------------------- |
---|
| 1412 | |
---|
| 1413 | |
---|
| 1414 | #---------------------------------------------------------------------------- |
---|
| 1415 | # |
---|
| 1416 | # set_signals |
---|
| 1417 | # |
---|
| 1418 | # HUP is ignored in the mmdsh parent and its exec'ed rsh children. |
---|
| 1419 | # |
---|
| 1420 | # STOP, CONT, and TSTP are defaulted - this means that they work on the |
---|
| 1421 | # parent, but are ignored (not propagated to) the exec'ed rsh children |
---|
| 1422 | # or the remote processes. |
---|
| 1423 | # |
---|
| 1424 | # Set the signal handler for all other signals. |
---|
| 1425 | # The signals will be propagated to the exec'd children and then |
---|
| 1426 | # the default action will be taken in the parent. |
---|
| 1427 | # |
---|
| 1428 | # rsh will propagate TERM, QUIT, and INT to the remote processes. |
---|
| 1429 | # |
---|
| 1430 | #---------------------------------------------------------------------------- |
---|
| 1431 | |
---|
| 1432 | sub set_signals { |
---|
| 1433 | |
---|
| 1434 | # Default STOP, CONT, TSTP signal handling |
---|
| 1435 | $SIG{'STOP'} = 'DEFAULT'; |
---|
| 1436 | $SIG{'CONT'} = 'DEFAULT'; |
---|
| 1437 | $SIG{'TSTP'} = 'DEFAULT'; |
---|
| 1438 | |
---|
| 1439 | # Propagate signals to forked kids. |
---|
| 1440 | $SIG{'TERM'} = 'infanticide'; |
---|
| 1441 | $SIG{'QUIT'} = 'infanticide'; |
---|
| 1442 | $SIG{'INT'} = 'infanticide'; |
---|
| 1443 | $SIG{'ABRT'} = 'infanticide'; |
---|
| 1444 | $SIG{'ALRM'} = 'infanticide'; |
---|
| 1445 | $SIG{'FPE'} = 'infanticide'; |
---|
| 1446 | $SIG{'ILL'} = 'infanticide'; |
---|
| 1447 | $SIG{'PIPE'} = 'infanticide'; |
---|
| 1448 | $SIG{'SEGV'} = 'infanticide'; |
---|
| 1449 | $SIG{'USR1'} = 'infanticide'; |
---|
| 1450 | $SIG{'USR2'} = 'infanticide'; |
---|
| 1451 | $SIG{'TTIN'} = 'infanticide'; |
---|
| 1452 | $SIG{'TTOU'} = 'infanticide'; |
---|
| 1453 | $SIG{'BUS'} = 'infanticide'; |
---|
| 1454 | |
---|
| 1455 | } #---------- end of set_signals routine ----------------------------- |
---|
| 1456 | |
---|
| 1457 | |
---|
| 1458 | #---------------------------------------------------------------------------- |
---|
| 1459 | # |
---|
| 1460 | # wait_for_kids_and_add_hosts |
---|
| 1461 | # |
---|
| 1462 | # When a child dies, it must be an exit after the end of his ping. |
---|
| 1463 | # If a negative return code, the ping failed. Check whether we |
---|
| 1464 | # should give up on this host and eliminate him from the collective. |
---|
| 1465 | # Add the kid's host to the working collective if the ping succeeded |
---|
| 1466 | # or if we were told to add him anyway. |
---|
| 1467 | # |
---|
| 1468 | # Parameters: |
---|
| 1469 | # wait_all -- true to "wait" on all active children, false to only "wait" |
---|
| 1470 | # for completed children (fanout maintenance). |
---|
| 1471 | # |
---|
| 1472 | #---------------------------------------------------------------------------- |
---|
| 1473 | |
---|
| 1474 | sub wait_for_kids_and_add_hosts { |
---|
| 1475 | |
---|
| 1476 | my $wait_all = shift; |
---|
| 1477 | |
---|
| 1478 | local($child_pid, $child_rc, $child_host, $host_found, $wait_opt); |
---|
| 1479 | |
---|
| 1480 | if ($wait_all eq true) { |
---|
| 1481 | # Wait for all children ==> Blocking waitpid |
---|
| 1482 | $wait_opt = 0; |
---|
| 1483 | } |
---|
| 1484 | else { |
---|
| 1485 | # Wait for completed children only ==> Non-blocking waitpid |
---|
| 1486 | $wait_opt = &WNOHANG; |
---|
| 1487 | } |
---|
| 1488 | |
---|
| 1489 | # Wait for any children and process accordingly. We will wait for at |
---|
| 1490 | # least one child for both "wait some" and "wait all" cases as the design |
---|
| 1491 | # point is to only call this routine when the fanout limit has been reached. |
---|
| 1492 | if (($child_pid = wait) != -1) { |
---|
| 1493 | |
---|
| 1494 | PINGWAIT: { |
---|
| 1495 | |
---|
| 1496 | # Obtain the return code and hostname for the child process. |
---|
| 1497 | $child_rc = $? >> 8; |
---|
| 1498 | foreach (keys %pid) { |
---|
| 1499 | if ($pid{$_} == $child_pid) { |
---|
| 1500 | $child_host = $_; |
---|
| 1501 | last; |
---|
| 1502 | } |
---|
| 1503 | } |
---|
| 1504 | |
---|
| 1505 | # Close the pipes used for collecting data from the ping. |
---|
| 1506 | close($Rout{$child_host}); |
---|
| 1507 | close($Rerr{$child_host}); |
---|
| 1508 | |
---|
| 1509 | # If the ping failed, assume the host is not reachable; |
---|
| 1510 | # don't add it to the collective unless told to include it anyway. |
---|
| 1511 | if ($child_rc != 0) { |
---|
| 1512 | push(@goners,$child_host); |
---|
| 1513 | } |
---|
| 1514 | else { |
---|
| 1515 | # Host reachable --> Add to collective (duplicates previously culled). |
---|
| 1516 | push(@wc,$child_host); |
---|
| 1517 | } |
---|
| 1518 | |
---|
| 1519 | # Child harvested ==> Decrement cur_fanout |
---|
| 1520 | $cur_fanout--; |
---|
| 1521 | |
---|
| 1522 | # Waitpid for any child. For "wait some" we will perform a non-blocking |
---|
| 1523 | # child wait, terminating processing if none completed. For "wait all" |
---|
| 1524 | # we will perform a blocking wait, terminating processing if no children |
---|
| 1525 | # remain. |
---|
| 1526 | |
---|
| 1527 | $child_pid = waitpid(-1, $wait_opt); |
---|
| 1528 | if ((($wait_all eq false) && ($child_pid > 0)) || |
---|
| 1529 | (($wait_all eq true) && ($child_pid != -1))) |
---|
| 1530 | { |
---|
| 1531 | redo PINGWAIT; |
---|
| 1532 | } |
---|
| 1533 | } |
---|
| 1534 | } |
---|
| 1535 | |
---|
| 1536 | } #---------- end of wait_for_kids_and_add_hosts routine -------------- |
---|
| 1537 | |
---|
| 1538 | |
---|
| 1539 | #---------------------------------------------------------------------------- |
---|
| 1540 | # |
---|
| 1541 | # delete_hosts |
---|
| 1542 | # |
---|
| 1543 | # Called if any hosts don't respond. |
---|
| 1544 | # Remove them from the working collective unless the -c flag was set. |
---|
| 1545 | # Input is the hostnames to remove from the working collective. |
---|
| 1546 | # |
---|
| 1547 | #---------------------------------------------------------------------------- |
---|
| 1548 | |
---|
| 1549 | sub delete_hosts { |
---|
| 1550 | |
---|
| 1551 | local($child_host,$h,$host_count); |
---|
| 1552 | |
---|
| 1553 | foreach $child_host (@goners) { |
---|
| 1554 | $host_count = 0; |
---|
| 1555 | foreach $h (@wc) { |
---|
| 1556 | if ($h eq $child_host) { |
---|
| 1557 | splice(@wc, $host_count, 1); |
---|
| 1558 | } |
---|
| 1559 | $host_count++; |
---|
| 1560 | } |
---|
| 1561 | } |
---|
| 1562 | |
---|
| 1563 | } #---------- end of delete_hosts routine ----------------------------- |
---|
| 1564 | |
---|
| 1565 | |
---|
| 1566 | #---------------------------------------------------------------------------- |
---|
| 1567 | # |
---|
| 1568 | # infanticide |
---|
| 1569 | # |
---|
| 1570 | # User has signaled the mmdsh parent - propagate TERM, INT, or QUIT to children. |
---|
| 1571 | # (Note - TERM, INT, and QUIT will be propagated to remote processes by rsh). |
---|
| 1572 | # Signal any children with SIGTERM if signal is not one of the above. |
---|
| 1573 | # Wait for children to manage output and prevent zombies. |
---|
| 1574 | # Signal self after setting default signal-handling for self. |
---|
| 1575 | # If still alive, exit. |
---|
| 1576 | # Input is the signal type. |
---|
| 1577 | # |
---|
| 1578 | #---------------------------------------------------------------------------- |
---|
| 1579 | |
---|
| 1580 | sub infanticide { |
---|
| 1581 | |
---|
| 1582 | local($sig) = @_; |
---|
| 1583 | local($kid_sig); |
---|
| 1584 | #print STDERR "mmdsh: Caught SIG$sig - terminating the kids\n"; |
---|
| 1585 | &prtMsg(366, $sig); |
---|
| 1586 | if ($sig ne 'QUIT' && $sig ne 'INT' && $sig ne 'TERM') { |
---|
| 1587 | $kid_sig = 'TERM'; |
---|
| 1588 | $SIG{'TERM'} = 'IGNORE'; |
---|
| 1589 | } else { |
---|
| 1590 | $kid_sig = $sig; |
---|
| 1591 | } |
---|
| 1592 | $SIG{$sig} = 'DEFAULT'; |
---|
| 1593 | kill $kid_sig, (values %pid); |
---|
| 1594 | &read_pipes_and_wait(true, @hs); |
---|
| 1595 | kill $sig, $$; |
---|
| 1596 | exit($rcode); |
---|
| 1597 | |
---|
| 1598 | } #---------- end of infanticide routine ---------------------------- |
---|
| 1599 | |
---|
| 1600 | |
---|
| 1601 | #---------------------------------------------------------------------------- |
---|
| 1602 | # |
---|
| 1603 | # check_wc |
---|
| 1604 | # |
---|
| 1605 | # Check to ensure that there are hosts in our working collective. |
---|
| 1606 | # |
---|
| 1607 | #---------------------------------------------------------------------------- |
---|
| 1608 | |
---|
| 1609 | sub check_wc { |
---|
| 1610 | |
---|
| 1611 | if (!@wc) { |
---|
| 1612 | if ($hostCount == 1) { |
---|
| 1613 | #print STDERR "mmdsh: Node $targetHost is not available to run the command."; |
---|
| 1614 | &prtMsg(573, $targetHost); |
---|
| 1615 | exit(80); # MM_HostDown |
---|
| 1616 | } |
---|
| 1617 | else { |
---|
| 1618 | #print STDERR "There are no available nodes on which to run the command." |
---|
| 1619 | &prtMsg(367); |
---|
| 1620 | exit(++$rcode); |
---|
| 1621 | } |
---|
| 1622 | } |
---|
| 1623 | |
---|
| 1624 | } #---------- end of check_wc routine --------------------------------- |
---|
| 1625 | |
---|
| 1626 | |
---|
| 1627 | #---------------------------------------------------------------------------- |
---|
| 1628 | # |
---|
| 1629 | # Mainline program |
---|
| 1630 | # |
---|
| 1631 | # The program continues while there are commands to distribute to the working |
---|
| 1632 | # collective via rsh. Children are forked for each host, up to the fanout |
---|
| 1633 | # limit. Stdout and stderr are piped back from the children to the parent |
---|
| 1634 | # who will display the results of the execed rsh's to the parent's stdout |
---|
| 1635 | # and stderr. |
---|
| 1636 | # |
---|
| 1637 | #---------------------------------------------------------------------------- |
---|
| 1638 | |
---|
| 1639 | # Determine the execution environment and initialize variables. |
---|
| 1640 | chop($osName=`/bin/uname -s`); |
---|
| 1641 | if ($osName eq "AIX") { |
---|
| 1642 | $grep="/usr/bin/grep"; |
---|
| 1643 | $ping="/usr/sbin/ping"; |
---|
| 1644 | $DSPMSG="/usr/bin/dspmsg -s 32 mmfs.cat"; |
---|
| 1645 | } |
---|
| 1646 | elsif ($osName eq "Linux") { |
---|
| 1647 | $grep="/bin/grep"; |
---|
| 1648 | $ping="/bin/ping"; |
---|
| 1649 | } |
---|
| 1650 | else { |
---|
| 1651 | print STDERR "mmdsh: Unknown execution environment $osName\n"; |
---|
| 1652 | exit(-1); |
---|
| 1653 | } |
---|
| 1654 | $pingTimeout = 2; # initial single ping timeout period |
---|
| 1655 | $maxPingCount = 3; # number of pings before declaring a node dead |
---|
| 1656 | $fanout_default = 64; # default fanout value |
---|
| 1657 | |
---|
| 1658 | # Flush output filesystem buffers after each write. |
---|
| 1659 | select(STDOUT); $| = 1; |
---|
| 1660 | select(STDERR); $| = 1; |
---|
| 1661 | |
---|
| 1662 | # Get the set environment locales. |
---|
| 1663 | use locale; |
---|
| 1664 | $lang=$ENV{'LANG'}; |
---|
| 1665 | $lcall=$ENV{'LC_ALL'}; |
---|
| 1666 | $lccol=$ENV{'LC_COLLATE'}; |
---|
| 1667 | $lctyp=$ENV{'LC_TYPE'}; |
---|
| 1668 | $lcmon=$ENV{'LC_MONETARY'}; |
---|
| 1669 | $lcnum=$ENV{'LC_NUMERIC'}; |
---|
| 1670 | $lctim=$ENV{'LC_TIME'}; |
---|
| 1671 | $lcmsg=$ENV{'LC_MESSAGES'}; |
---|
| 1672 | |
---|
| 1673 | $mmmode=$ENV{'MMMODE'}; |
---|
| 1674 | $environmentType=$ENV{'environmentType'}; |
---|
| 1675 | $rshPath=$ENV{'GPFS_rshPath'}; |
---|
| 1676 | $rcpPath=$ENV{'GPFS_rcpPath'}; |
---|
| 1677 | $mmTrace=$ENV{'mmScriptTrace'}; |
---|
| 1678 | |
---|
| 1679 | if ($rshPath eq "" || $rshPath eq "_DEFAULT_") { |
---|
| 1680 | $rshPath="/usr/bin/rsh"; |
---|
| 1681 | } |
---|
| 1682 | elsif ( ! -x $rshPath) { |
---|
| 1683 | #esjlrm - fix the above to strip any options |
---|
| 1684 | #die "mmdsh: Invalid or missing remote shell command: $rshPath\n"; |
---|
| 1685 | &prtMsg(422, $rshPath); |
---|
| 1686 | exit(-1); |
---|
| 1687 | } |
---|
| 1688 | |
---|
| 1689 | if ($rcpPath eq "" || $rcpPath eq "_DEFAULT_") { |
---|
| 1690 | $rcpPath="/usr/bin/rcp"; |
---|
| 1691 | } |
---|
| 1692 | elsif ( ! -x $rcpPath) { |
---|
| 1693 | #esjlrm - fix the above to strip any options |
---|
| 1694 | #die "mmdsh: Invalid or missing remote file copy command: $rcpPath\n"; |
---|
| 1695 | &prtMsg(423, $rcpPath); |
---|
| 1696 | exit(-1); |
---|
| 1697 | } |
---|
| 1698 | |
---|
| 1699 | $exportcmd = "export LANG=$lang; export LC_ALL=$lcall; export LC_COLLATE=$lccol; export LC_TYPE=$lctyp; export LC_MONETARY=$lcmon; export LC_NUMERIC=$lcnum; export LC_TIME=$lctim; export LC_MESSAGES=$lcmsg; export MMMODE=$mmmode; export environmentType=$environmentType; export GPFS_rshPath=$rshPath; export GPFS_rcpPath=$rcpPath; export mmScriptTrace=$mmTrace; "; |
---|
| 1700 | |
---|
| 1701 | |
---|
| 1702 | # Set signal handling for forked (child) processes, |
---|
| 1703 | # parse the command line, and determine our working collective. |
---|
| 1704 | &set_signals; |
---|
| 1705 | &parse; |
---|
| 1706 | &get_wc; |
---|
| 1707 | &display_wc; |
---|
| 1708 | &set_defaults; |
---|
| 1709 | &check_wc; |
---|
| 1710 | |
---|
| 1711 | # Perform each command on the nodes in our working collective. |
---|
| 1712 | while ($command = &get_command) { |
---|
| 1713 | |
---|
| 1714 | if ($iflag) { |
---|
| 1715 | print STDERR "mmdsh: Command to run: $command\n\n"; |
---|
| 1716 | } |
---|
| 1717 | |
---|
| 1718 | # If the special command _SELECT_FROM_FILE_ is specified, |
---|
| 1719 | # the command to be executed by each of the nodes is given |
---|
| 1720 | # in the file specified in the mmdshCommandsFile variable. |
---|
| 1721 | if ($command eq "_SELECT_FROM_FILE_") { |
---|
| 1722 | $selectCommandFromFile++; |
---|
| 1723 | unless ($mmdshCommandsFile = $ENV{'mmdshCommandsFile'}) { |
---|
| 1724 | die "mmdsh: mmdshCommandsFile environment variable not set\n"; |
---|
| 1725 | } |
---|
| 1726 | unless ( -f $mmdshCommandsFile ) { |
---|
| 1727 | #die "mmdsh: File $mmdshCommandsFile not found\n"; |
---|
| 1728 | &prtMsg(364, $mmdshCommandsFile, "\'$!\'"); |
---|
| 1729 | exit(-1); |
---|
| 1730 | } |
---|
| 1731 | } |
---|
| 1732 | |
---|
| 1733 | # Clear out the host array and pid hash (also used in host verification) |
---|
| 1734 | undef @hs; |
---|
| 1735 | undef %pid; |
---|
| 1736 | |
---|
| 1737 | # The working collective, @wc, at this point is guaranteed to contain only |
---|
| 1738 | # unique entries. This prevents key collisions on the %pid hash table. |
---|
| 1739 | foreach $host (@wc) { |
---|
| 1740 | |
---|
| 1741 | # If the special command _SELECT_FROM_FILE_ is specified, |
---|
| 1742 | # retrieve the command string to be executed by the node. |
---|
| 1743 | |
---|
| 1744 | if ($selectCommandFromFile) { |
---|
| 1745 | $command = `$grep -w ^$host $mmdshCommandsFile`; |
---|
| 1746 | chop($command); |
---|
| 1747 | |
---|
| 1748 | # If there is no command for this host, move on. |
---|
| 1749 | unless ($command) { |
---|
| 1750 | if ($iflag) { |
---|
| 1751 | print STDERR "mmdsh: $host: No command found.\n"; |
---|
| 1752 | } |
---|
| 1753 | next; |
---|
| 1754 | } |
---|
| 1755 | |
---|
| 1756 | # Remove the hostname from the command string. |
---|
| 1757 | @dsh_ARGV = split(' ',$command); |
---|
| 1758 | shift(@dsh_ARGV); |
---|
| 1759 | $command = join(' ',@dsh_ARGV); |
---|
| 1760 | |
---|
| 1761 | if ($iflag) { |
---|
| 1762 | print STDERR "mmdsh: $host: $command \n"; |
---|
| 1763 | } |
---|
| 1764 | } |
---|
| 1765 | |
---|
| 1766 | |
---|
| 1767 | # Create filehandles for pipe ends. |
---|
| 1768 | $r_out{$host} = "READ_STDOUT_" . $host; |
---|
| 1769 | $w_out{$host} = "WRITE_STDOUT_" . $host; |
---|
| 1770 | $r_err{$host} = "READ_STDERR_" . $host; |
---|
| 1771 | $w_err{$host} = "WRITE_STDERR_" . $host; |
---|
| 1772 | |
---|
| 1773 | # Open pipes for this host's stdout and stderr from rsh. |
---|
| 1774 | if (pipe($r_out{$host}, $w_out{$host}) < 0) { |
---|
| 1775 | #die "mmdsh: Couldn't pipe: $!\n"; |
---|
| 1776 | &prtMsg(368, "\'$!\'"); |
---|
| 1777 | exit(-1); |
---|
| 1778 | } |
---|
| 1779 | if (pipe($r_err{$host}, $w_err{$host}) < 0) { |
---|
| 1780 | #die "mmdsh: Couldn't pipe: $!\n"; |
---|
| 1781 | &prtMsg(368, "\'$!\'"); |
---|
| 1782 | exit(-1); |
---|
| 1783 | } |
---|
| 1784 | |
---|
| 1785 | # Fork a child to exec the rsh. |
---|
| 1786 | MAINFORK: { |
---|
| 1787 | |
---|
| 1788 | if ($pid{$host} = fork) { |
---|
| 1789 | |
---|
| 1790 | # Parent code - |
---|
| 1791 | # Close unneeded ends of pipes. |
---|
| 1792 | # Parent will wait for child processes if fanout limit reached. |
---|
| 1793 | close($w_out{$host}); |
---|
| 1794 | close($w_err{$host}); |
---|
| 1795 | |
---|
| 1796 | push(@hs,$host); |
---|
| 1797 | |
---|
| 1798 | if (++$cur_fanout >= $fanout) { |
---|
| 1799 | &read_pipes_and_wait(false, @hs); |
---|
| 1800 | } |
---|
| 1801 | |
---|
| 1802 | } elsif (defined $pid{$host}) { |
---|
| 1803 | |
---|
| 1804 | # Child code - |
---|
| 1805 | # Close unneeded ends of pipes. |
---|
| 1806 | # Redirect stdout and stderr to output pipes. |
---|
| 1807 | # Exec rsh. |
---|
| 1808 | # stdout/stderr will go to pipes to be read by parent. |
---|
| 1809 | close($r_out{$host}); |
---|
| 1810 | close($r_err{$host}); |
---|
| 1811 | |
---|
| 1812 | unless (open(STDOUT, ">&$w_out{$host}")) { |
---|
| 1813 | #die "mmdsh: Cannot redirect STDOUT: $!\n"; |
---|
| 1814 | &prtMsg(369, 'STDOUT', "\'$!\'"); |
---|
| 1815 | exit(-1); |
---|
| 1816 | } |
---|
| 1817 | unless (open(STDERR, ">&$w_err{$host}")) { |
---|
| 1818 | #die "mmdsh: Cannot redirect STDERR: $!\n"; |
---|
| 1819 | &prtMsg(369, 'STDERR', "\'$!\'"); |
---|
| 1820 | exit(-1); |
---|
| 1821 | } |
---|
| 1822 | |
---|
| 1823 | select(STDOUT); $| = 1; |
---|
| 1824 | select(STDERR); $| = 1; |
---|
| 1825 | |
---|
| 1826 | # If the -I option is specified, copy the specified files |
---|
| 1827 | # to the remote host prior to invoking the actual command. |
---|
| 1828 | if ($stageFile) { |
---|
| 1829 | $rcpCommandString = "$rcpPath -p $fileToCopy $host:$fileToCopy"; |
---|
| 1830 | if ($iflag) { |
---|
| 1831 | print STDERR "mmdsh: $rcpCommandString \n"; |
---|
| 1832 | } |
---|
| 1833 | $rcpOutput = `LC_ALL=C $rcpCommandString 2>&1`; |
---|
| 1834 | $rcpRc = $? >> 8; |
---|
| 1835 | |
---|
| 1836 | # If the rcopy fails, move to the next host. |
---|
| 1837 | if ($rcpRc > 0 && $rcpOutput !~ /refer to the same file/) { |
---|
| 1838 | if ($rcpOutput) { |
---|
| 1839 | printf STDERR "%s", $rcpOutput; |
---|
| 1840 | } |
---|
| 1841 | &prtMsg(171, $rcpCommandString, $rcpRc); |
---|
| 1842 | die "mmdsh: $command will not be executed on $host.\n"; |
---|
| 1843 | } |
---|
| 1844 | } |
---|
| 1845 | |
---|
| 1846 | if ($stageFile2) { |
---|
| 1847 | $rcpCommandString = "$rcpPath -p $fileToCopy2 $host:$fileToCopy2"; |
---|
| 1848 | if ($iflag) { |
---|
| 1849 | print STDERR "mmdsh: $rcpCommandString \n"; |
---|
| 1850 | } |
---|
| 1851 | $rcpOutput = `LC_ALL=C $rcpCommandString 2>&1`; |
---|
| 1852 | $rcpRc = $? >> 8; |
---|
| 1853 | |
---|
| 1854 | # If the rcopy fails, move to the next host. |
---|
| 1855 | if ($rcpRc > 0 && $rcpOutput !~ /refer to the same file/) { |
---|
| 1856 | if ($rcpOutput) { |
---|
| 1857 | printf STDERR "%s", $rcpOutput; |
---|
| 1858 | } |
---|
| 1859 | &prtMsg(171, $rcpCommandString, $rcpRc); |
---|
| 1860 | die "mmdsh: $command will not be executed on $host.\n"; |
---|
| 1861 | } |
---|
| 1862 | } |
---|
| 1863 | |
---|
| 1864 | # Execute the command on the remote host. |
---|
| 1865 | if (!@dsh_ARGV) { |
---|
| 1866 | # mmdsh was invoked without specifying a command. |
---|
| 1867 | # The command to execute comes from the mmdsh prompt. |
---|
| 1868 | if ($ENV{'DSHPATH'}) { |
---|
| 1869 | exec ($rshPath, |
---|
| 1870 | $host, '-n', '-l', $login, |
---|
| 1871 | "export PATH=$ENV{'DSHPATH'};", |
---|
| 1872 | $exportcmd, $command) || |
---|
| 1873 | die "mmdsh: rsh: $host $command: $!\n"; |
---|
| 1874 | } else { |
---|
| 1875 | exec ($rshPath, |
---|
| 1876 | $host, '-n', '-l', $login, |
---|
| 1877 | $exportcmd, $command) || |
---|
| 1878 | die "mmdsh: rsh: $host $command: $!\n"; |
---|
| 1879 | } |
---|
| 1880 | } else { |
---|
| 1881 | # The command to execute comes from the mmdsh command line. |
---|
| 1882 | # This is the path taken by the mm commands. |
---|
| 1883 | if ($ENV{'DSHPATH'}) { |
---|
| 1884 | exec ($rshPath, |
---|
| 1885 | $host, '-n', '-l', $login, |
---|
| 1886 | "export PATH=$ENV{'DSHPATH'};", |
---|
| 1887 | $exportcmd, @dsh_ARGV) || |
---|
| 1888 | die "mmdsh: rsh: $host @dsh_ARGV: $!\n"; |
---|
| 1889 | } else { |
---|
| 1890 | exec ($rshPath, |
---|
| 1891 | $host, '-n', '-l', $login, |
---|
| 1892 | $exportcmd, @dsh_ARGV) || |
---|
| 1893 | die "mmdsh: rsh: $host @dsh_ARGV: $!\n"; |
---|
| 1894 | } |
---|
| 1895 | } |
---|
| 1896 | |
---|
| 1897 | } else { |
---|
| 1898 | |
---|
| 1899 | # Try again. The fork must have failed due to a resource problem. |
---|
| 1900 | if ($iflag) { |
---|
| 1901 | print STDERR "mmdsh: fork() failed; will retry in 5 seconds.\n"; |
---|
| 1902 | } |
---|
| 1903 | sleep 5; |
---|
| 1904 | redo MAINFORK; |
---|
| 1905 | } |
---|
| 1906 | } |
---|
| 1907 | } |
---|
| 1908 | |
---|
| 1909 | # Parent continues here after forking all the children for this command. |
---|
| 1910 | # Get the results of any remaining rsh's (the number of hosts in our |
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| 1911 | # working collective may not be a multiple of the fanout value). |
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| 1912 | # Get rid of any hosts that have failed. |
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| 1913 | # Display the working collective and command. |
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| 1914 | &read_pipes_and_wait(true, @hs); |
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| 1915 | &delete_hosts; |
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| 1916 | unless ($done) { |
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| 1917 | $cur_fanout = 0; |
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| 1918 | &check_wc; |
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| 1919 | &display_wc; |
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| 1920 | } |
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| 1921 | } |
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| 1922 | |
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| 1923 | # If requested, delete the -I files. |
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| 1924 | if ($stageFile && $kflag) { |
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| 1925 | `/bin/rm -f $fileToCopy $fileToCopy2 >/dev/null 2>&1`; |
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| 1926 | } |
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| 1927 | |
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| 1928 | # exit |
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| 1929 | |
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| 1930 | exit($rcode); #---------- end of mainline program ---------------- |
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| 1931 | |
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