Method kill()

Method kill

bool kill(int pid, int signal)

Description

Send a signal to another process.

Some signals and their supposed purpose:

SIGHUP	Hang-up, sent to process when user logs out.
SIGINT	Interrupt, normally sent by ctrl-c.
SIGQUIT	Quit, sent by ctrl-\.
SIGILL	Illegal instruction.
SIGTRAP	Trap, mostly used by debuggers.
SIGABRT	Aborts process, can be caught, used by Pike whenever something goes seriously wrong.
SIGEMT	Emulation trap.
SIGFPE	Floating point error (such as division by zero).
SIGKILL	Really kill a process, cannot be caught.
SIGBUS	Bus error.
SIGSEGV	Segmentation fault, caused by accessing memory where you shouldn't. Should never happen to Pike.
SIGSYS	Bad system call. Should never happen to Pike.
SIGPIPE	Broken pipe.
SIGALRM	Signal used for timer interrupts.
SIGTERM	Termination signal.
SIGUSR1	Signal reserved for whatever you want to use it for. Note that some OSs reserve this signal for the thread library.
SIGUSR2	Signal reserved for whatever you want to use it for. Note that some OSs reserve this signal for the thread library.
SIGCHLD	Child process died. This signal is reserved for internal use by the Pike run-time.
SIGPWR	Power failure or restart.
SIGWINCH	Window change signal.
SIGURG	Urgent socket data.
SIGIO	Pollable event.
SIGSTOP	Stop (suspend) process.
SIGTSTP	Stop (suspend) process. Sent by ctrl-z.
SIGCONT	Continue suspended.
SIGTTIN	TTY input for background process.
SIGTTOU	TTY output for background process.
SIGVTALRM	Virtual timer expired.
SIGPROF	Profiling trap.
SIGXCPU	Out of CPU.
SIGXFSZ	File size limit exceeded.
SIGSTKFLT	Stack fault

Returns

1	Success.
0	Failure. errno() is set to EINVAL, EPERM or ESRCH.

Note

Note that you have to use signame to translate the name of a signal to its number.

Note that the kill function is not available on platforms that do not support signals. Some platforms may also have signals not listed here.

See also

signal(), signum(), signame(), fork()