NAME
killpg — send a
signal to a process group
SYNOPSIS
int killpg(pid_t pgrp, int sig);
DESCRIPTION
The killpg () function shall send the
signal specified by sig to the process group specified by
pgrp.
If pgrp is greater than 1,
killpg ( pgrp,
sig) shall be equivalent to
kill (-
pgrp, sig). If pgrp is
less than or equal to 1, the behavior of killpg ()
is undefined.
RETURN VALUE
Refer to kill(3) .
ERRORS
Refer to kill(3) .
EXAMPLES
Sending a Signal to All Other Members of a Process Group
The following example shows how the calling process could send a signal to all other members of its process group. To prevent itself from receiving the signal it first makes itself immune to the signal by ignoring it.
#include <signal.h>
#include <unistd.h>
...
if (signal(SIGUSR1, SIG_IGN) == SIG_ERR)
/* Handle error */;
if (killpg(getpgrp(), SIGUSR1) == -1)
/* Handle error */;"
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
getpgid(3) , getpid(3) , kill(3) , raise(3)
XBD <signal.h>
CHANGE HISTORY
First released in Issue 4, Version 2.
Issue 5
Moved from X/OPEN UNIX extension to BASE.
Issue 6
IEEE Std 1003.1-2001 (“POSIX.1”)/Cor 2-2004, item XSH/TC2/D6/52 is applied, adding the example to the EXAMPLES section.