killpg(3) - Linux manual page (original) (raw)

killpg(3) Library Functions Manual killpg(3)

NAME top

   killpg - send signal to a process group

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#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 top

   **killpg**() sends the signal _sig_ to the process group _pgrp_.  See
   [signal(7)](../man7/signal.7.html) 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)](../man2/kill.2.html).

RETURN VALUE top

   On success, zero is returned.  On error, -1 is returned, and _[errno](../man3/errno.3.html)_
   is set to indicate the error.

ERRORS top

   **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)](../man2/kill.2.html).

   **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.

VERSIONS top

   There are various differences between the permission checking in
   BSD-type systems and System V-type systems.  See the POSIX
   rationale for [kill(3p)](../man3/kill.3p.html).  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).

STANDARDS top

   POSIX.1-2008.

HISTORY top

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

SEE ALSO top

   [getpgrp(2)](../man2/getpgrp.2.html), [kill(2)](../man2/kill.2.html), [signal(2)](../man2/signal.2.html), [capabilities(7)](../man7/capabilities.7.html), [credentials(7)](../man7/credentials.7.html)

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Linux man-pages 6.10 2024-07-23 killpg(3)

Pages that refer to this page:kill(2), sigaction(2), signal(2), credentials(7), signal(7)