killpg - Sends a signal to a process group
Standard C Library (libc.so, libc.a)
Application developers may want to specify an #include statement for <sys/types.h> before the one for <signal.h> if programs are being developed for multiple platforms. The additional #include statement is not required on Tru64 UNIX systems or by ISO or X/Open standards, but may be required on other vendors' systems that conform to these standards.
Interfaces documented on this reference page conform to industry standards as follows:
Refer to the standards(5) reference page for more information about industry standards and associated tags.
Specifies the process group. Specifies the signal. If the signal parameter is a value of 0 (zero, the null signal), error checking is performed but no signal is sent. This parameter can be used to check the validity of the process parameter.
The killpg() function sends the signal specified by the signal parameter to the group of processes specified by the process_grp parameter.
The process sending the signal must have the same effective user ID or saved set-user-ID as the members of the process group, or the sending process must belong to the superuser. The continue signal, SIGCONT, is a special case: it may be sent to any process that is a descendent of the current process.
Upon successful completion, the killpg() function returns a value of 0 (zero). Otherwise, a value of -1 is returned, and errno is set to indicate the error.
If any of the following conditions occurs, the killpg() function sets errno to the corresponding value: The signal parameter is not a valid signal number. No process can be found in process_grp.
Functions: getpid(2), kill(2), raise(3), setpgid(2), sigaction(2), sigvec(2)
Standards: standards(5) delim off