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. |
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515 | # Return the executed command's exit code. |
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516 | # |
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517 | #---------------------------------------------------------------------------- |
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518 | |
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519 | sub do_system { |
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520 | |
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521 | local($command) = @_; |
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522 | local(%save_sig,$rc); |
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523 | %save_sig = %SIG; |
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524 | grep($_ = 'DEFAULT', %SIG); |
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525 | $rc = system("$command 2>&1") >> 8; |
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526 | %SIG = %save_sig; |
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527 | return($rc); |
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528 | |
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529 | } #---------- end of do_system routine --------------------------------- |
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530 | |
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531 | |
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532 | #---------------------------------------------------------------------------- |
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533 | # |
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534 | # display_help |
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535 | # |
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536 | # Display help information |
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537 | # |
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538 | #---------------------------------------------------------------------------- |
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539 | |
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540 | sub display_help { |
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541 | |
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542 | $usageMsg=" |
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543 | Usage: |
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544 | |
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545 | mmdsh [flags/parms] command |
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546 | |
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547 | Flags/parms: |
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548 | |
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549 | -f number fanout number to use for concurrent execution |
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550 | -F filename nodelist file listing nodes on which to execute command |
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551 | -I filename file to be staged on the remote node prior to executing |
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552 | command; the file must be in /var/mmfs/tmp |
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553 | -k remove the file specified with the -I flag before exiting |
---|
554 | -L n1,n2,n3 comma-separated list of nodes on which to execute command |
---|
555 | -N nodespec node specificaton that consists of a node list, a node file, |
---|
556 | or a node class on which to execute the command |
---|
557 | -s suppress the prepending of the hostname string to each line |
---|
558 | of output generated by running the command on the remote node |
---|
559 | -v verify that nodes are reachable before adding them to the |
---|
560 | set of nodes on which to run the command |
---|
561 | -i display the set of nodes on which the command will run |
---|
562 | before command execution |
---|
563 | "; |
---|
564 | print STDERR "$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 |
---|
1911 | # working collective may not be a multiple of the fanout value). |
---|
1912 | # Get rid of any hosts that have failed. |
---|
1913 | # Display the working collective and command. |
---|
1914 | &read_pipes_and_wait(true, @hs); |
---|
1915 | &delete_hosts; |
---|
1916 | unless ($done) { |
---|
1917 | $cur_fanout = 0; |
---|
1918 | &check_wc; |
---|
1919 | &display_wc; |
---|
1920 | } |
---|
1921 | } |
---|
1922 | |
---|
1923 | # If requested, delete the -I files. |
---|
1924 | if ($stageFile && $kflag) { |
---|
1925 | `/bin/rm -f $fileToCopy $fileToCopy2 >/dev/null 2>&1`; |
---|
1926 | } |
---|
1927 | |
---|
1928 | # exit |
---|
1929 | |
---|
1930 | exit($rcode); #---------- end of mainline program ---------------- |
---|
1931 | |
---|