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getsid(2) [opensolaris man page]

getsid(2)							   System Calls 							 getsid(2)

NAME
getsid - get process group ID of session leader SYNOPSIS
#include <unistd.h> pid_t getsid(pid_t pid); DESCRIPTION
The getsid() function obtains the process group ID of the process that is the session leader of the process specified by pid. If pid is (pid_t)0, it specifies the calling process. RETURN VALUES
Upon successful completion, getsid() returns the process group ID of the session leader of the specified process. Otherwise, it returns (pid_t)-1 and sets errno to indicate the error. ERRORS
The getsid() function will fail if: EPERM The process specified by pid is not in the same session as the calling process, and the implementation does not allow access to the process group ID of the session leader of that process from the calling process. ESRCH There is no process with a process ID equal to pid. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
exec(2), fork(2), getpid(2), getpgid(2), setpgid(2), setsid(2), attributes(5), standards(5) SunOS 5.11 22 Jan 1996 getsid(2)

Check Out this Related Man Page

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 function getsid() 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 fail if: [ESRCH] There is no process with a process ID equal to pid. Note that an implementation may restrict this function 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() function call appeared in FreeBSD 3.0. The getsid() function call is derived from its usage in AT&T System V UNIX. BSD
August 19, 1997 BSD
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