| [20] | 1 | strace of "sleep 1 | sleep 2" being run from interactive bash 3.0 |
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| 2 | |
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| 3 | |
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| 4 | Synopsis: |
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| 5 | open /dev/tty [, if fails, open ttyname(0)]; close /* helps re-establish ctty */ |
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| 6 | get current signal mask |
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| 7 | TCGETS on fd# 0 |
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| 8 | TCGETS on fd# 2 /* NB: if returns ENOTTY (2>/dev/null), sh seems to disable job control, |
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| 9 | does not show prompt, but still executes cmds from fd# 0 */ |
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| 10 | install default handlers for CHLD QUIT TERM |
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| 11 | install common handler for HUP INT ILL TRAP ABRT FPE BUS SEGV SYS PIPE ALRM TERM XCPU XFSZ VTALRM USR1 USR2 |
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| 12 | ignore QUIT |
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| 13 | install handler for INT |
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| 14 | ignore TERM |
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| 15 | install handler for INT |
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| 16 | ignore TSTP TTOU TTIN |
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| 17 | install handler for WINCH |
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| 18 | get pid, ppid |
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| 19 | block all signals |
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| 20 | unblock all signals |
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| 21 | get our pprocess group |
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| 22 | minidoc: |
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| 23 | Each process group is a member of a session and each process is a member |
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| 24 | of the session of which its process group is a member. |
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| 25 | Process groups are used for distribution of signals, and by terminals |
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| 26 | to arbitrate requests for their input: processes that have the same |
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| 27 | process group as the terminal are foreground and may read, while others |
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| 28 | will block with a signal if they attempt to read. These calls are thus used |
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| 29 | by programs (shells) to create process groups in implementing job control. |
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| 30 | The TIOCGPGRP and TIOCSPGRP calls described in termios(3) are used to get/set |
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| 31 | the process group of the control terminal. |
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| 32 | If a session has a controlling terminal, CLOCAL is not set and a hangup occurs, |
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| 33 | then the session leader is sent a SIGHUP. If the session leader exits, |
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| 34 | the SIGHUP signal will be sent to each process in the foreground process |
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| 35 | group of the controlling terminal. |
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| 36 | If the exit of the process causes a process group to become orphaned, |
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| 37 | and if any member of the newly-orphaned process group is stopped, then a SIGHUP |
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| 38 | signal followed by a SIGCONT signal will be sent to each process |
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| 39 | in the newly-orphaned process group. |
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| 40 | ... |
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| 41 | dup stderr to fd# 255 |
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| 42 | move ourself to our own process group |
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| 43 | block CHLD TSTP TTIN TTOU |
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| 44 | set tty's (255, stderr's) foreground process group to our group |
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| 45 | allow all signals |
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| 46 | mark 255 CLOEXEC |
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| 47 | set CHLD handler |
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| 48 | get signal mask |
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| 49 | get fd#0 flags |
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| 50 | get signal mask |
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| 51 | set INT handler |
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| 52 | block CHLD TSTP TTIN TTOU |
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| 53 | set fd #255 foreground process group to our group |
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| 54 | allow all signals |
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| 55 | set INT handler |
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| 56 | block all signals |
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| 57 | allow all signals |
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| 58 | block INT |
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| 59 | allow all signals |
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| 60 | lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN |
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| 61 | block all signals |
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| 62 | allow all signals |
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| 63 | block all signals |
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| 64 | allow all signals |
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| 65 | block all signals |
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| 66 | allow all signals |
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| 67 | read "sleep 1 | sleep 2\n" |
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| 68 | block INT |
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| 69 | TCSETSW on fd# 0 |
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| 70 | allow all signals |
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| 71 | lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN |
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| 72 | block CHLD |
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| 73 | pipe([4, 5]) /* oops seems I lost another pipe() in editing... */ |
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| 74 | fork child #1 |
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| 75 | put child in it's own process group |
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| 76 | block only CHLD |
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| 77 | close(5) |
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| 78 | block only INT CHLD |
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| 79 | fork child #2 |
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| 80 | put child in the same process group as first one |
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| 81 | block only CHLD |
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| 82 | close(4) |
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| 83 | block only CHLD |
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| 84 | block only CHLD TSTP TTIN TTOU |
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| 85 | set fd# 255 foreground process group to first child's one |
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| 86 | block only CHLD |
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| 87 | block only CHLD |
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| 88 | block only CHLD |
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| 89 | /* note: because shell is not in foreground now, e.g. Ctrl-C will send INT to children only! */ |
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| 90 | wait4 for children to die or stop - first child exits |
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| 91 | wait4 for children to die or stop - second child exits |
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| 92 | block CHLD TSTP TTIN TTOU |
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| 93 | set fd# 255 foreground process group to our own one |
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| 94 | block only CHLD |
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| 95 | block only CHLD |
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| 96 | block nothing |
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| 97 | --- SIGCHLD (Child exited) @ 0 (0) --- |
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| 98 | wait for it - no child (already waited for) |
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| 99 | sigreturn() |
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| 100 | read signal mask |
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| 101 | lotsa sigactions... |
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| 102 | read next command |
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| 103 | |
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| 104 | |
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| 105 | execve("/bin/sh", ["sh"], [/* 34 vars */]) = 0 |
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| 106 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 107 | ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 |
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| 108 | ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 |
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| 109 | rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
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| 110 | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
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| 111 | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
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| 112 | rt_sigaction(SIGHUP, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 113 | rt_sigaction(SIGINT, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 114 | rt_sigaction(SIGILL, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 115 | rt_sigaction(SIGTRAP, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 116 | rt_sigaction(SIGABRT, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 117 | rt_sigaction(SIGFPE, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 118 | rt_sigaction(SIGBUS, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 119 | rt_sigaction(SIGSEGV, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 120 | rt_sigaction(SIGSYS, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 121 | rt_sigaction(SIGPIPE, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 122 | rt_sigaction(SIGALRM, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 123 | rt_sigaction(SIGTERM, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 124 | rt_sigaction(SIGXCPU, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 125 | rt_sigaction(SIGXFSZ, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 126 | rt_sigaction(SIGVTALRM, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 127 | rt_sigaction(SIGUSR1, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 128 | rt_sigaction(SIGUSR2, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 129 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 130 | rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
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| 131 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 132 | rt_sigaction(SIGTERM, {SIG_IGN}, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 133 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 134 | rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
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| 135 | rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
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| 136 | rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
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| 137 | rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 138 | getpid() = 19473 |
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| 139 | getppid() = 19472 |
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| 140 | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
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| 141 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 142 | getpgrp() = 1865 |
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| 143 | dup(2) = 4 |
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| 144 | fcntl64(255, F_GETFD) = -1 EBADF (Bad file descriptor) |
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| 145 | dup2(4, 255) = 255 |
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| 146 | close(4) = 0 |
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| 147 | ioctl(255, TIOCGPGRP, [1865]) = 0 |
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| 148 | getpid() = 19473 |
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| 149 | setpgid(0, 19473) = 0 |
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| 150 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
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| 151 | ioctl(255, TIOCSPGRP, [19473]) = 0 |
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| 152 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 153 | fcntl64(255, F_SETFD, FD_CLOEXEC) = 0 |
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| 154 | rt_sigaction(SIGCHLD, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
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| 155 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 156 | fcntl64(0, F_GETFL) = 0x2 (flags O_RDWR) |
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| 157 | ... |
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| 158 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 159 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 160 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
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| 161 | ioctl(255, TIOCSPGRP, [19473]) = 0 |
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| 162 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 163 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 164 | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
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| 165 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 166 | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
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| 167 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 168 | rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 169 | rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 170 | rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 171 | rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 172 | rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 173 | rt_sigaction(SIGALRM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 174 | rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 175 | rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 176 | rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 177 | rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 178 | rt_sigaction(SIGTTIN, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 179 | rt_sigaction(SIGTTIN, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 180 | rt_sigaction(SIGWINCH, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 181 | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
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| 182 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 183 | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
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| 184 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 185 | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
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| 186 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 187 | write(2, "sh-3.00# ", 9) = 9 |
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| 188 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 189 | read(0, "s", 1) = 1 |
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| 190 | write(2, "s", 1) = 1 |
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| 191 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 192 | read(0, "l", 1) = 1 |
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| 193 | write(2, "l", 1) = 1 |
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| 194 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 195 | ... rest of "sleep 1 | sleep 2" entered... |
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| 196 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 197 | read(0, "2", 1) = 1 |
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| 198 | write(2, "2", 1) = 1 |
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| 199 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 200 | read(0, "\r", 1) = 1 |
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| 201 | write(2, "\n", 1) = 1 |
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| 202 | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
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| 203 | ioctl(0, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0 |
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| 204 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 205 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 206 | rt_sigaction(SIGTERM, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
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| 207 | rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
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| 208 | rt_sigaction(SIGALRM, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 209 | rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
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| 210 | rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
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| 211 | rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
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| 212 | rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, 8) = 0 |
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| 213 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 214 | rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 |
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| 215 | pipe([4, 5]) = 0 |
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| 216 | rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 |
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| 217 | fork() = 19755 |
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| 218 | setpgid(19755, 19755) = 0 |
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| 219 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 220 | close(5) = 0 |
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| 221 | rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 |
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| 222 | fork() = 19756 |
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| 223 | setpgid(19756, 19755) = 0 |
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| 224 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 225 | close(4) = 0 |
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| 226 | rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 |
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| 227 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0 |
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| 228 | ioctl(255, TIOCSPGRP, [19755]) = 0 |
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| 229 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 230 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 231 | rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 |
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| 232 | wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19755 |
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| 233 | wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19756 |
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| 234 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0 |
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| 235 | ioctl(255, TIOCSPGRP, [19473]) = 0 |
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| 236 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 237 | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
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| 238 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 239 | --- SIGCHLD (Child exited) @ 0 (0) --- |
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| 240 | wait4(-1, 0x77fc9c54, WNOHANG|WUNTRACED, NULL) = -1 ECHILD (No child processes) |
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| 241 | sigreturn() = ? (mask now []) |
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| 242 | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
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| 243 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 244 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
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| 245 | ioctl(255, TIOCSPGRP, [19473]) = 0 |
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| 246 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 247 | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 248 | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
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| 249 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 250 | rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 251 | rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 252 | rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 253 | rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 254 | rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 255 | rt_sigaction(SIGALRM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f752, [HUP INT ILL TRAP ABRT BUS FPE USR1 SEGV USR2 PIPE ALRM TERM XCPU XFSZ VTALRM SYS], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 256 | rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 257 | rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 258 | rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 259 | rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 260 | rt_sigaction(SIGTTIN, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
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| 261 | rt_sigaction(SIGTTIN, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 262 | rt_sigaction(SIGWINCH, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 263 | write(2, "sh-3.00# ", 9) = 9 |
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| 264 | |
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| 265 | |
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| 266 | getpid() = 19755 |
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| 267 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 268 | rt_sigaction(SIGTSTP, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 269 | rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 270 | rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 271 | setpgid(19755, 19755) = 0 |
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| 272 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
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| 273 | ioctl(255, TIOCSPGRP, [19755]) = 0 |
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| 274 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 275 | close(4) = 0 |
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| 276 | dup2(5, 1) = 1 |
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| 277 | close(5) = 0 |
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| 278 | rt_sigaction(SIGINT, {SIG_DFL}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 279 | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 280 | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 281 | rt_sigaction(SIGCHLD, {SIG_DFL}, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 282 | execve("/bin/sleep", ["sleep", "1"], [/* 34 vars */]) = 0 |
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| 283 | ... |
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| 284 | _exit(0) = ? |
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| 285 | |
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| 286 | |
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| 287 | getpid() = 19756 |
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| 288 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 289 | rt_sigaction(SIGTSTP, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 290 | rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 291 | rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 292 | setpgid(19756, 19755) = 0 |
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| 293 | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
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| 294 | ioctl(255, TIOCSPGRP, [19755]) = 0 |
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| 295 | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
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| 296 | dup2(4, 0) = 0 |
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| 297 | close(4) = 0 |
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| 298 | rt_sigaction(SIGINT, {SIG_DFL}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 299 | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
|---|
| 300 | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
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| 301 | rt_sigaction(SIGCHLD, {SIG_DFL}, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
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| 302 | execve("/bin/sleep", ["sleep", "2"], [/* 34 vars */]) = 0 |
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| 303 | ... |
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| 304 | _exit(0) = ? |
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