305 lines
16 KiB
Plaintext
305 lines
16 KiB
Plaintext
strace of "sleep 1 | sleep 2" being run from interactive bash 3.0
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Synopsis:
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open /dev/tty [, if fails, open ttyname(0)]; close /* helps re-establish ctty */
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get current signal mask
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TCGETS on fd# 0
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TCGETS on fd# 2 /* NB: if returns ENOTTY (2>/dev/null), sh seems to disable job control,
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does not show prompt, but still executes cmds from fd# 0 */
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install default handlers for CHLD QUIT TERM
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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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ignore QUIT
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install handler for INT
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ignore TERM
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install handler for INT
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ignore TSTP TTOU TTIN
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install handler for WINCH
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get pid, ppid
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block all signals
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unblock all signals
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get our pprocess group
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minidoc:
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Each process group is a member of a session and each process is a member
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of the session of which its process group is a member.
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Process groups are used for distribution of signals, and by terminals
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to arbitrate requests for their input: processes that have the same
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process group as the terminal are foreground and may read, while others
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will block with a signal if they attempt to read. These calls are thus used
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by programs (shells) to create process groups in implementing job control.
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The TIOCGPGRP and TIOCSPGRP calls described in termios(3) are used to get/set
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the process group of the control terminal.
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If a session has a controlling terminal, CLOCAL is not set and a hangup occurs,
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then the session leader is sent a SIGHUP. If the session leader exits,
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the SIGHUP signal will be sent to each process in the foreground process
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group of the controlling terminal.
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If the exit of the process causes a process group to become orphaned,
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and if any member of the newly-orphaned process group is stopped, then a SIGHUP
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signal followed by a SIGCONT signal will be sent to each process
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in the newly-orphaned process group.
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...
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dup stderr to fd# 255
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move ourself to our own process group
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block CHLD TSTP TTIN TTOU
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set tty's (255, stderr's) foreground process group to our group
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allow all signals
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mark 255 CLOEXEC
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set CHLD handler
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get signal mask
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get fd#0 flags
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get signal mask
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set INT handler
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block CHLD TSTP TTIN TTOU
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set fd #255 foreground process group to our group
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allow all signals
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set INT handler
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block all signals
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allow all signals
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block INT
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allow all signals
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lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN
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block all signals
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allow all signals
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block all signals
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allow all signals
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block all signals
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allow all signals
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read "sleep 1 | sleep 2\n"
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block INT
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TCSETSW on fd# 0
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allow all signals
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lotsa sigactions: set INT,ALRM,WINCH handlers, ignore TERM,QUIT,TSTP,TTOU,TTIN
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block CHLD
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pipe([4, 5]) /* oops seems I lost another pipe() in editing... */
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fork child #1
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put child in it's own process group
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block only CHLD
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close(5)
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block only INT CHLD
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fork child #2
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put child in the same process group as first one
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block only CHLD
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close(4)
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block only CHLD
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block only CHLD TSTP TTIN TTOU
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set fd# 255 foreground process group to first child's one
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block only CHLD
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block only CHLD
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block only CHLD
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/* note: because shell is not in foreground now, e.g. Ctrl-C will send INT to children only! */
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wait4 for children to die or stop - first child exits
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wait4 for children to die or stop - second child exits
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block CHLD TSTP TTIN TTOU
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set fd# 255 foreground process group to our own one
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block only CHLD
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block only CHLD
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block nothing
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--- SIGCHLD (Child exited) @ 0 (0) ---
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wait for it - no child (already waited for)
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sigreturn()
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read signal mask
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lotsa sigactions...
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read next command
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execve("/bin/sh", ["sh"], [/* 34 vars */]) = 0
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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ioctl(0, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
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ioctl(2, SNDCTL_TMR_TIMEBASE or TCGETS, {B38400 opost isig icanon echo ...}) = 0
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rt_sigaction(SIGCHLD, {SIG_DFL}, {SIG_DFL}, 8) = 0
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rt_sigaction(SIGQUIT, {SIG_DFL}, {SIG_DFL}, 8) = 0
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rt_sigaction(SIGTERM, {SIG_DFL}, {SIG_DFL}, 8) = 0
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_DFL}, 8) = 0
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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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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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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_DFL}, 8) = 0
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rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_DFL}, 8) = 0
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rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_DFL}, 8) = 0
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rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0
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getpid() = 19473
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getppid() = 19472
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rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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getpgrp() = 1865
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dup(2) = 4
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fcntl64(255, F_GETFD) = -1 EBADF (Bad file descriptor)
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dup2(4, 255) = 255
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close(4) = 0
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ioctl(255, TIOCGPGRP, [1865]) = 0
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getpid() = 19473
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setpgid(0, 19473) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0
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ioctl(255, TIOCSPGRP, [19473]) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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fcntl64(255, F_SETFD, FD_CLOEXEC) = 0
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rt_sigaction(SIGCHLD, {0x807c922, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_DFL}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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fcntl64(0, F_GETFL) = 0x2 (flags O_RDWR)
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...
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0
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ioctl(255, TIOCSPGRP, [19473]) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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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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rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTTIN, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTTIN, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGWINCH, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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write(2, "sh-3.00# ", 9) = 9
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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read(0, "s", 1) = 1
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write(2, "s", 1) = 1
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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read(0, "l", 1) = 1
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write(2, "l", 1) = 1
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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... rest of "sleep 1 | sleep 2" entered...
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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read(0, "2", 1) = 1
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write(2, "2", 1) = 1
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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read(0, "\r", 1) = 1
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write(2, "\n", 1) = 1
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rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0
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ioctl(0, SNDCTL_TMR_STOP or TCSETSW, {B38400 opost isig icanon echo ...}) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTERM, {SIG_IGN}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGQUIT, {SIG_IGN}, {SIG_IGN}, 8) = 0
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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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rt_sigaction(SIGTSTP, {SIG_IGN}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTTOU, {SIG_IGN}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTTIN, {SIG_IGN}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGWINCH, {0x807dc33, [], SA_RESTORER, 0x6ff7a4f8}, {0x80ca5cd, [], SA_RESTORER|SA_RESTART, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
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pipe([4, 5]) = 0
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rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0
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fork() = 19755
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setpgid(19755, 19755) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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close(5) = 0
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rt_sigprocmask(SIG_BLOCK, [INT CHLD], [CHLD], 8) = 0
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fork() = 19756
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setpgid(19756, 19755) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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close(4) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0
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ioctl(255, TIOCSPGRP, [19755]) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD], [CHLD], 8) = 0
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wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19755
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wait4(-1, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], WUNTRACED, NULL) = 19756
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rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [CHLD], 8) = 0
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ioctl(255, TIOCSPGRP, [19473]) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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rt_sigprocmask(SIG_SETMASK, [CHLD], NULL, 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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--- SIGCHLD (Child exited) @ 0 (0) ---
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wait4(-1, 0x77fc9c54, WNOHANG|WUNTRACED, NULL) = -1 ECHILD (No child processes)
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sigreturn() = ? (mask now [])
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rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [CHLD TSTP TTIN TTOU], [], 8) = 0
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ioctl(255, TIOCSPGRP, [19473]) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigaction(SIGINT, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigprocmask(SIG_BLOCK, [INT], [], 8) = 0
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rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
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rt_sigaction(SIGINT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {0x808f7d7, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTERM, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTERM, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGQUIT, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGQUIT, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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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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rt_sigaction(SIGTSTP, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTSTP, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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rt_sigaction(SIGTTOU, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, {SIG_IGN}, 8) = 0
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rt_sigaction(SIGTTOU, {SIG_IGN}, {0x80ca530, [], SA_RESTORER, 0x6ff7a4f8}, 8) = 0
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|
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) = ?
|