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GETSID(2)		       System Calls Manual		       GETSID(2)

NAME
     getsid -- get process session

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     pid_t
     getsid(pid_t pid);

DESCRIPTION
     The  session  ID  of the process identified by pid is returned by getsid().
     If pid is zero, getsid() returns the session ID of the current process.

RETURN VALUES
     Upon successful completion, the getsid() system call returns the session ID
     of the specified process; otherwise, it returns a value of -1 and sets  er-
     rno to indicate an error.

ERRORS
     The getsid() system call will succeed unless:

     [ESRCH]		if there is no process with a process ID equal to pid.

     Note  that  an  implementation  may  restrict this system call to processes
     within the same session ID as the calling process.

SEE ALSO
     getpgid(2), getpgrp(2), setpgid(2), setsid(2), termios(4)

HISTORY
     The getsid() system call appeared in FreeBSD 3.0.	The getsid() system call
     is derived from its usage in AT&T System V UNIX.

FreeBSD ports 15.quarterly	 August 19, 1997		       GETSID(2)

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