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NetBSD 6.1.5 - man page for killpg (netbsd section 3)

KILLPG(3)			   BSD 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.

BSD					   June 2, 1993 				      BSD


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