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Command: killpg | Section: 3 | Source: MINIX | File: killpg.3
KILLPG(3) FreeBSD 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(pid_t pgrp, int sig);
DESCRIPTION
killpg() sends the signal sig to the process group pgrp. See
sigaction(2) for a list of signals. If pgrp is 0, killpg() sends the
signal to the sending process's process group.
The sending process and members of the process group must have the same
effective user ID, or the sender must be the super-user. As a single
special case the continue signal SIGCONT may be sent to any process that
is a descendant of the current process.
RETURN VALUES
Upon successful completion, a value of 0 is returned. Otherwise, a value
of -1 is returned and the global variable errno is set to indicate the
error.
ERRORS
killpg() will fail and no signal will be sent if:
[EINVAL] sig is not a valid signal number.
[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.
[EPERM] The sending process is not the super-user and one or
more of the target processes has an effective user ID
different from that of the sending process.
SEE ALSO
getpgrp(2), kill(2), sigaction(2)
HISTORY
The killpg() function call appeared in 4.0BSD.
FreeBSD 14.1-RELEASE-p8 June 2, 1993 FreeBSD 14.1-RELEASE-p8