dwww Home | Manual pages | Find package

killpg(3)                  Library Functions Manual                  killpg(3)

NAME
       killpg - send signal to a process group

LIBRARY
       Standard C library (libc, -lc)

SYNOPSIS
       #include <signal.h>

       int killpg(int pgrp, int sig);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       killpg():
           _XOPEN_SOURCE >= 500
               || /* Since glibc 2.19: */ _DEFAULT_SOURCE
               || /* glibc <= 2.19: */ _BSD_SOURCE

DESCRIPTION
       killpg() sends the signal sig to the process group pgrp.  See signal(7)
       for a list of signals.

       If pgrp is 0, killpg()  sends  the  signal  to  the  calling  process's
       process  group.   (POSIX  says: if pgrp is less than or equal to 1, the
       behavior is undefined.)

       For the permissions required to send a signal to another  process,  see
       kill(2).

RETURN VALUE
       On  success,  zero is returned.  On error, -1 is returned, and errno is
       set to indicate the error.

ERRORS
       EINVAL sig is not a valid signal number.

       EPERM  The process does not have permission to send the signal  to  any
              of  the  target  processes.   For  the required permissions, see
              kill(2).

       ESRCH  No process can be found in the process group specified by pgrp.

       ESRCH  The process group was given as 0 but the  sending  process  does
              not have a process group.

STANDARDS
       POSIX.1-2001,  POSIX.1-2008,  SVr4,  4.4BSD (killpg() first appeared in
       4BSD).

NOTES
       There are various differences between the permission checking  in  BSD-
       type  systems  and  System V-type systems.  See the POSIX rationale for
       kill(3p).  A difference not mentioned  by  POSIX  concerns  the  return
       value  EPERM:  BSD  documents that no signal is sent and EPERM returned
       when the permission check failed for at least one target process, while
       POSIX  documents  EPERM  only  when the permission check failed for all
       target processes.

   C library/kernel differences
       On Linux, killpg() is implemented as a library function that makes  the
       call kill(-pgrp, sig).

SEE ALSO
       getpgrp(2), kill(2), signal(2), capabilities(7), credentials(7)

Linux man-pages 6.03              2023-02-05                         killpg(3)

Generated by dwww version 1.15 on Wed Jun 26 05:50:06 CEST 2024.