setpgrp(2) System Calls Manual setpgrp(2)
Name
setpgrp - set process group
Syntax
setpgrp(pid, pgrp)
int pid, pgrp;
Description
The system call sets the process group of the specified process pid to the specified pgrp. If pid is zero, the call applies to the current
process.
If the invoker is not the superuser, the affected process must either have the same effective user-id as the invoker or be a descendant of
the invoking process.
Return Values
The system call returns zero (0) when the operation is successful. If the request fails, -1 is returned, and the global variable errno
indicates the reason.
Environment
SYSTEM_FIVE
When your program is compiled using the System V environment, is called without arguments and the new process group id is returned if suc-
cessful.
Diagnostics
The system call fails and the process group is not altered, if one of the following occur:
[EPERM] The effective user ID of the requested process is different from that of the caller and the process is not a descendent of
the calling process.
[ESRCH] The requested process does not exist.
See Also
getpgrp(2)
setpgrp(2)
