Manual Reference Pages  - GETSID (2)

NAME

getsid - get session ID

CONTENTS

Synopsis
Description
Return Value
Errors
Versions
Notes
Colophon

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 calling 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

SVr4, POSIX.1-2001.

NOTES

Linux does not return EPERM.

SEE ALSO

getpgid(2), setsid(2), credentials(7)

COLOPHON

This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.


Linux GETSID (2) 2010-09-26
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