@node setpgid, unix
@subheading Syntax

@example
#include <unistd.h>

int setpgid(pid_t _pid, pid_t _pgid);
@end example

@subheading Return Value

-1 (EPERM) if _pgid is not your current pid, else zero.

@subheading Portability

@portability !ansi, posix