05a6d9cbb
Denis Vlasenko
2007-04-19
Subject
doc: add README on shell job control
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shell/README.job+237 -0
| @@ -0,0 +1,237 @@ | |
| + | strace of "sleep 1 | sleep 2" being run from interactive bash 3.0 |
| + | |
| + | |
| + | Synopsis: |
| + | get current signal mask |
| + | install default handlers for GHLD QUIT TERM |
| + | install common handler for HUP INT ILL TRAP ABRT FPE BUS SEGV SYS PIPE ALRM TERM XCPU XFSZ VTALRM USR1 USR2 |
| + | ignore QUIT |
| + | install handler for INT |
| + | ignore TERM |
| + | install handler for INT |
| + | ignore TSTP TTOU TTIN |
| + | install handler for WINCH |
| + | get pid, ppid |
| + | block all signals |
| + | unblock all signals |
| + | get our pprocess group |
| + | minidoc: |
| + | Each process group is a member of a session and each process is a member |
| + | of the session of which its process group is a member. |
| + | Process groups are used for distribution of signals, and by terminals |
| + | to arbitrate requests for their input: processes that have the same |
| + | process group as the terminal are foreground and may read, while others |
| + | will block with a signal if they attempt to read. These calls are thus used |
| + | by programs (shells) to create process groups in implementing job control. |
| + | The TIOCGPGRP and TIOCSPGRP calls described in termios(3) are used to get/set |
| + | the process group of the control terminal. |
| + | If a session has a controlling terminal, CLOCAL is not set and a hangup occurs, |
| + | then the session leader is sent a SIGHUP. If the session leader exits, |
| + | the SIGHUP signal will be sent to each process in the foreground process |
| + | group of the controlling terminal. |
| + | If the exit of the process causes a process group to become orphaned, |
| + | and if any member of the newly-orphaned process group is stopped, then a SIGHUP |
| + | signal followed by a SIGCONT signal will be sent to each process |
| + | in the newly-orphaned process group. |
| + | ... |
| + | |
| + | |
| + | |
| + | execve("/bin/sh", ["sh"], [/* 34 vars */]) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_DFL}, 8) = 0 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | 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 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
| + | 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 |
| + | 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 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_DFL}, 8) = 0 |
| + | rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
| + | getpid() = 19473 |
| + | getppid() = 19472 |
| + | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | getpgrp() = 1865 |
| + | dup(2) = 4 |
| + | fcntl64(255, F_GETFD) = -1 EBADF (Bad file descriptor) |
| + | dup2(4, 255) = 255 |
| + | close(4) = 0 |
| + | ioctl(255, TIOCGPGRP, [1865]) = 0 |
| + | getpid() = 19473 |
| + | setpgid(0, 19473) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19473]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | fcntl64(255, F_SETFD, FD_CLOEXEC) = 0 |
| + | rt_sigaction(SIGCHLD, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | fcntl64(0, F_GETFL) = 0x2 (flags O_RDWR) |
| + | ... |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19473]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | 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 |
| + | rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGWINCH, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | write(2, "sh-3.00# ", 9) = 9 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | read(0, "s", 1) = 1 |
| + | write(2, "s", 1) = 1 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | read(0, "l", 1) = 1 |
| + | write(2, "l", 1) = 1 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | ... rest of "sleep 1 | sleep 2" entered... |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | read(0, "2", 1) = 1 |
| + | write(2, "2", 1) = 1 |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | read(0, "\r", 1) = 1 |
| + | write(2, "\n", 1) = 1 |
| + | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
| + | ioctl(0, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
| + | 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 |
| + | rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 |
| + | pipe([4, 5]) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 |
| + | fork() = 19755 |
| + | setpgid(19755, 19755) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | close(5) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0 |
| + | fork() = 19756 |
| + | setpgid(19756, 19755) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | close(4) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19755]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0 |
| + | wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19755 |
| + | wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19756 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19473]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | --- SIGCHLD (Child exited) @ 0 (0) --- |
| + | wait4(-1, 0x77fc9c54, WNOHANG|WUNTRACED, NULL) = -1 ECHILD (No child processes) |
| + | sigreturn() = ? (mask now []) |
| + | rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19473]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | 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 |
| + | rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGWINCH, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | write(2, "sh-3.00# ", 9) = 9 |
| + | |
| + | |
| + | getpid() = 19755 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGTSTP, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | setpgid(19755, 19755) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19755]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | close(4) = 0 |
| + | dup2(5, 1) = 1 |
| + | close(5) = 0 |
| + | rt_sigaction(SIGINT, {SIG_DFL}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGCHLD, {SIG_DFL}, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | execve("/bin/sleep", ["sleep", "1"], [/* 34 vars */]) = 0 |
| + | ... |
| + | _exit(0) = ? |
| + | |
| + | |
| + | getpid() = 19756 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | rt_sigaction(SIGTSTP, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTIN, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTTOU, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | setpgid(19756, 19755) = 0 |
| + | rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0 |
| + | ioctl(255, TIOCSPGRP, [19755]) = 0 |
| + | rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 |
| + | dup2(4, 0) = 0 |
| + | close(4) = 0 |
| + | rt_sigaction(SIGINT, {SIG_DFL}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_IGN}, 8) = 0 |
| + | rt_sigaction(SIGCHLD, {SIG_DFL}, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0 |
| + | execve("/bin/sleep", ["sleep", "2"], [/* 34 vars */]) = 0 |
| + | ... |
| + | _exit(0) = ? |