SETPGID(2-SVR4)     RISC/os Reference Manual      SETPGID(2-SVR4)



NAME
     setpgid - set process group ID

SYNOPSIS
     #include <sys/types.h>
     #include <unistd.h>

     int setpgid(pidt pid, pidt pgid);

DESCRIPTION
     setpgid sets the process group ID of the process with ID pid
     to pgid.  If pgid is equal to pid,  the process becomes a
     process group leader.  If pgid is not equal to pid, the pro-
     cess becomes a member of an existing process group.

     If pid is equal to 0, the process ID of the calling process
     is used.  If pgid is equal to 0, the process specified by
     pid becomes a process group leader.

     setpgid fails and returns an error if one or more of the
     following are true:

     EACCES         pid matches the process ID of a child process
                    of the calling process and the child process
                    has successfully executed an exec(2) func-
                    tion.

     EINVAL         pgid is less than (pid_t) 0, or greater than
                    or equal to {PID_MAX}.

     EINVAL         The calling process has a controlling termi-
                    nal that does not support job control.

     EPERM          The process indicated by the pid argument is
                    a session leader.

     EPERM          pid matches the process ID of a child process
                    of the calling process and the child process
                    is not in the same session as the calling
                    process.

     EPERM          pgid does not match the process ID of the
                    process indicated by the pid argument and
                    there is no process with a process group ID
                    that matches pgid in the same session as the
                    calling process.

     ESRCH          pid does not match the process ID of the cal-
                    ling process or of a child process of the
                    calling process.





                        Printed 11/19/92                   Page 1

SETPGID(2-SVR4)     RISC/os Reference Manual      SETPGID(2-SVR4)



SEE ALSO
     exec(2), exit(2), fork(2), getpid(2), getpgid(2), setsid(2).

DIAGNOSTICS
     Upon successful completion, setpgid returns a value of 0.
     Otherwise, a value of -1 is returned and errno is set to
     indicate the error.
















































 Page 2                 Printed 11/19/92