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OpenSolaris 2009.06 - man page for setpgid (opensolaris section 2)

setpgid(2)				   System Calls 			       setpgid(2)

NAME
       setpgid - set process group ID

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

       int setpgid(pid_t pid, pid_t pgid);

DESCRIPTION
       The setpgid() function 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. See Intro(2) for more
       information on session leaders and process group leaders.

       If pgid is not equal to pid, the process 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.

RETURN VALUES
       Upon  successful  completion, 0 is returned. Otherwise, -1 is returned and errno is set to
       indicate the error.

ERRORS
       The setpgid() function will fail if:

       EACCES	 The pid argument matches the process ID  of  a  child	process  of  the  calling
		 process  and the child process has successfully executed  one of the exec family
		 of functions (see exec(2)).

       EINVAL	 The pgid argument is less than (pid_t) 0 or greater than or equal to PID_MAX, or
		 the  calling  process	has a controlling terminal that does not support job con-
		 trol.

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

       EPERM	 The pid argument 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	 The  pgid argument 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	 The  pid  argument  does not match the process ID of the calling process or of a
		 child process of the calling process.

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Async-Signal-Safe 	   |
       +-----------------------------+-----------------------------+

SEE ALSO
       Intro(2), exec(2), exit(2), fork(2), getpid(2), getsid(2), attributes(5), standards(5)

SunOS 5.11				   28 Dec 1996				       setpgid(2)


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