| strace of "sleep 1 | sleep 2" being run from interactive bash 3.0 |
| |
| |
| Synopsis: |
| open /dev/tty [, if fails, open ttyname(0)]; close /* helps re-establish ctty */ |
| get current signal mask |
| TCGETS on fd# 0 |
| TCGETS on fd# 2 /* NB: if returns ENOTTY (2>/dev/null), sh seems to disable job control, |
| does not show prompt, but still executes cmds from fd# 0 */ |
| install default handlers for CHLD 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. |
| ... |
| dup stderr to fd# 255 |
| move ourself to our own process group |
| block CHLD TSTP TTIN TTOU |
| set tty's (255, stderr's) foreground process group to our group |
| allow all signals |
| mark 255 CLOEXEC |
| set CHLD handler |
| get signal mask |
| get fd#0 flags |
| get signal mask |
| set INT handler |
| block CHLD TSTP TTIN TTOU |
| set fd #255 foreground process group to our group |
| allow all signals |
| set INT handler |
| block all signals |
| allow all signals |
| block INT |
| allow all signals |
| lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN |
| block all signals |
| allow all signals |
| block all signals |
| allow all signals |
| block all signals |
| allow all signals |
| read "sleep 1 | sleep 2\n" |
| block INT |
| TCSETSW on fd# 0 |
| allow all signals |
| lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN |
| block CHLD |
| pipe([4, 5]) /* oops seems I lost another pipe() in editing... */ |
| fork child #1 |
| put child in it's own process group |
| block only CHLD |
| close(5) |
| block only INT CHLD |
| fork child #2 |
| put child in the same process group as first one |
| block only CHLD |
| close(4) |
| block only CHLD |
| block only CHLD TSTP TTIN TTOU |
| set fd# 255 foreground process group to first child's one |
| block only CHLD |
| block only CHLD |
| block only CHLD |
| /* note: because shell is not in foreground now, e.g. Ctrl-C will send INT to children only! */ |
| wait4 for children to die or stop - first child exits |
| wait4 for children to die or stop - second child exits |
| block CHLD TSTP TTIN TTOU |
| set fd# 255 foreground process group to our own one |
| block only CHLD |
| block only CHLD |
| block nothing |
| --- SIGCHLD (Child exited) @ 0 (0) --- |
| wait for it - no child (already waited for) |
| sigreturn() |
| read signal mask |
| lotsa sigactions... |
| read next command |
| |
| |
| execve("/bin/sh", ["sh"], [/* 34 vars */]) = 0 |
| rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0 |
| ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0 |
| ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 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) = ? |
