opensolaris man page for setpgrp

setpgrp(2)							   System Calls 							setpgrp(2)

NAME
       setpgrp - set process group ID

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

       pid_t setpgrp(void);

DESCRIPTION
       If  the calling process is not already a session leader, the setpgrp() function makes it one by setting its process group ID and session ID
       to the value of its process ID, and releases its controlling terminal. See Intro(2) for more information on process group IDs  and  session
       leaders.

RETURN VALUES
       The setpgrp() function returns the value of the new process group ID.

ERRORS
       No errors are defined.

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       setpgrp(1), Intro(2), exec(2), fork(2), getpid(2), getsid(2), kill(2), signal(3C), attributes(5), standards(5)

SunOS 5.11							    5 Jan 2000								setpgrp(2)