getsid(2) [netbsd man page]

GETSID(2)						      BSD System Calls Manual							 GETSID(2)

NAME

     getsid -- get session ID

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     pid_t
     getsid(pid_t pid);

DESCRIPTION

     The getsid() function returns the session ID of the process specified by pid.  If pid is 0, the session ID of the calling process is
     returned.	The session ID is defined as the process group ID of the process that is the session leader.

ERRORS

     If an error occurs, getsid() returns -1 and the global variable errno is set to indicate the error, as follows:

     [ESRCH]		No process can be found corresponding to that specified by pid.

SEE ALSO

     getpgid(2), setsid(2), termios(4)

STANDARDS

     The getsid() function conforms to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').

BSD
								   April 4, 2011							       BSD

GETSID(2)						      BSD 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 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.

BSD
								  August 19, 1997							       BSD