SIMPLE SOLUTIONS

GETSID - reference manual online

Get session ID.

Chapter
2015-08-08
GETSID(2)                           Linux Programmer's Manual                           GETSID(2)

NAME getsid - get session ID
SYNOPSIS #include <unistd.h> pid_t getsid(pid_t pid); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): getsid(): _XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
DESCRIPTION getsid(0) returns the session ID of the calling process. getsid(p) returns the session ID of the process with process ID p. (The session ID of a process is the process group ID of the session leader.)
RETURN VALUE On success, a session ID is returned. On error, (pid_t) -1 will be returned, and errno is set appropriately.
ERRORS EPERM A process with process ID p exists, but it is not in the same session as the call‐ ing process, and the implementation considers this an error. ESRCH No process with process ID p was found.
VERSIONS This system call is available on Linux since version 2.0.
CONFORMING TO POSIX.1-2001, POSIX.1-2008, SVr4.
NOTES Linux does not return EPERM.
SEE ALSO getpgid(2), setsid(2), credentials(7)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at http://www.kernel.org/doc/man-pages/.
Linux 2015-08-08 GETSID(2)
This manual Reference Other manuals
getsid(2) referred by cr_restart(1) | credentials(7) | getpgid(2freebsd) | getpgrp(2freebsd) | getsid(2freebsd) | procenv(1) | ps(1) | sd_pid_get_session(3) | setsid(2) | syscalls(2) | tcgetsid(3) | utmp(5)
refer to credentials(7) | feature_test_macros(7) | setpgid(2) | setsid(2)