killpg - Man Page

send a signal to a process group


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.


#include <signal.h>

int killpg(pid_t pgrp, int sig);


The killpg() function shall send the signal specified by sig to the process group specified by pgrp.

If pgrp is greater than 1, killpg(pgrpsig) shall be equivalent to kill(-pgrpsig). If pgrp is less than or equal to 1, the behavior of killpg() is undefined.

Return Value

Refer to kill().


Refer to kill().

The following sections are informative.


Sending a Signal to All Other Members of a Process Group

The following example shows how the calling process could send a signal to all other members of its process group. To prevent itself from receiving the signal it first makes itself immune to the signal by ignoring it.

#include <signal.h>
#include <unistd.h>
    if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
        /* Handle error */;

    if (killpg(getpgrp(), SIGUSR1) == -1)
        /* Handle error */;"

Application Usage




Future Directions


See Also

getpgid(), getpid(), kill(), raise()

The Base Definitions volume of POSIX.1-2017, <signal.h>

Referenced By


2017 IEEE/The Open Group POSIX Programmer's Manual