table of contents
other versions
- jessie 3.74-1
- jessie-backports 4.10-2~bpo8+1
- stretch 4.10-2
- testing 4.16-1
- stretch-backports 4.16-1~bpo9+1
- unstable 4.16-1
other sections
GETSID(2) | Linux Programmer's Manual | GETSID(2) |
NAME¶
getsid - get session IDSYNOPSIS¶
#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 3.74 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/.2010-09-26 | Linux |