NAME
getsid - get session IDLIBRARY
Standard C library (libc, -lc)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 || /* Since glibc 2.12: */ _POSIX_C_SOURCE >= 200809L
DESCRIPTION
getsid() returns the session ID of the process with process ID pid. If pid is 0, getsid() returns the session ID of the calling process.RETURN VALUE
On success, a session ID is returned. On error, (pid_t) -1 is returned, and errno is set to indicate the error.ERRORS
- EPERM
- A process with process ID pid 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 pid was found.
VERSIONS
This system call is available since Linux 2.0.STANDARDS
POSIX.1-2001, POSIX.1-2008, SVr4.NOTES
Linux does not return EPERM. See credentials(7) for a description of sessions and session IDs.SEE ALSO
getpgid(2), setsid(2), credentials(7)2022-12-04 | Linux man-pages 6.03 |