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