Send a signal to a process group
#include <sys/types.h> #include <signal.h> int killpg( pid_t pgrp, int sig );
If the signal terminates a process, the cleanup of the terminated process occurs by default at the priority of the thread that sent the signal. As a QNX Neutrino extension, if you OR the SIG_TERMER_NOINHERIT flag (defined in <signal.h>) into sig, the cleanup occurs at the priority of the thread that received the signal.
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The killpg() function sends the signal sig to the process group specified by pgrp. If sig is zero, no signal is sent, but pgrp is still checked for validity.
If pgrp is greater than 1, killpg (pgrp, sig) is equivalent to kill (−pgrp, sig).
Zero, or -1 if an error occurs (errno is set).
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | Yes |
Thread | Yes |