SETPGRP(2)                386BSD Programmer's Manual                SETPGRP(2)

NAME
     setpgid, setpgrp - set process group

SYNOPSIS
     #include <unistd.h>

     int
     setpgid(pid_tpid, pid_tpgrp)

     int
     setpgrp(pid_tpid, pid_tpgrp)

DESCRIPTION
     Setpgid() sets the process group of the specified process pid to the
     specified pgrp. If pid is zero, then the call applies to the current
     process.

     If the invoker is not the super-user, then the affected process must have
     the same effective user-id as the invoker or be a descendant of the
     invoking process.

RETURN VALUES
     Setpgid() returns 0 when the operation was successful.  If the request
     failed, -1 is returned and the global variable errno indicates the
     reason.

ERRORS
     Setpgid() will fail and the process group will not be altered if:

     [ESRCH]
             The requested process does not exist.

     [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.

SEE ALSO
     getpgrp(2)

STANDARDS
     Setpgid() conforms to IEEE Std 1003.1-1988 (``POSIX'').

COMPATIBILITY
     Setpgrp() is identical to setpgid(), and is retained for calling
     convention compatibility with historical versions of BSD UNIX.

4th Berkeley Distribution       March 10, 1991                               1