(BSD System Compatibility)

killpg(3bsd)

killpg -- (BSD) send signal to a process group

Synopsis

   /usr/ucb/cc [flag . . . ] file . . .
   
   int killpg(int pgrp, int sig);

Description

killpg sends the signal sig to the process group pgrp. See sigvec(3bsd) 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.

killpg will fail and no signal will be sent if any of the following occur:

EINVAL: sig is not a valid signal number.
ESRCH: No processes were found in the specified process group.
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.

References

kill(2), setpgrp(2), sigaction(2), sigvec(3bsd)