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man:killpg

KILLPG(3) Linux Programmer's Manual KILLPG(3)

NAME

     killpg - send signal to a process group

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 versions <= 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 appropriately.

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.

CONFORMING TO

     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().   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)

COLOPHON

     This page is part of release 4.16 of the Linux  man-pages  project.   A
     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 KILLPG(3)

/data/webs/external/dokuwiki/data/pages/man/killpg.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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