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   killpg    ( 3 )

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Имя (Name)

killpg - send signal to a process group

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Синопсис (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

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Описание (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).

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Возвращаемое значение (Return value)

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

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Ошибки (Error)

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.

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Стандарты (Conforming to)

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

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Примечание (Note)

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).

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Смотри также (See also)

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

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