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getsid
Langue: en
Version: 2007-07-26 (mandriva - 01/05/08)
Section: 2 (Appels système)
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
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.
CONFORMING TO
SVr4, POSIX.1-2001.NOTES
Linux does not return EPERM.Linux has this system call since Linux 1.3.44. There is libc support since libc 5.2.19.
SEE ALSO
getpgid(2), setsid(2), credentials(7)COLOPHON
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