mirror of
https://git.busybox.net/busybox.git
synced 2024-11-23 21:53:25 +08:00
doc: add README on shell job control
This commit is contained in:
Denis Vlasenko
parent
8581863a1b
commit
05a6d9cbb2
237
shell/README.job
Normal file
237
shell/README.job
Normal file
@ -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) = ?
|
||||
Loading…
Reference in New Issue
Block a user