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 errno 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.

Debian                                           August 19, 1997                                       GETSID(2)