killpg - send signal to a process group

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SYNOPSIS

#include <signal.h>

int killpg(pid_t pgrp, int sig);

DESCRIPTION

killpg() sends the signal sig to the process group pgrp. See signal.5 for a list of signals.

The real or effective user ID of the sending process must match the real or saved set-user ID of the receiving process, unless the effective user ID of the sending process is the privileged user. A single exception is the signal SIGCONT, which may always be sent to any 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 any of the following occur:

EINVAL

sig is not a valid signal number.

EPERM

The effective user ID of the sending process is not privileged user, and neither its real nor effective user ID matches the real or saved set-user ID of one or more of the target processes.

ESRCH

No processes were found in the specified process group.

SEE ALSO

Created by unroff & hp-tools. © by Hans-Peter Bischof. All Rights Reserved (1997).

Last modified 21/April/97