TCGETSID(3) |
Linux Programmer's Manual |
TCGETSID(3) |
NAME
tcgetsid - get session ID
SYNOPSIS
#define _XOPEN_SOURCE 500 /* See feature_test_macros(7) */
#include <termios.h>
pid_t tcgetsid(int
fd
);
DESCRIPTION
The function
tcgetsid() returns the session ID of the current session that has the terminal associated to
fd as controlling terminal. This terminal must be the controlling terminal of the calling process.
RETURN VALUE
When
fd refers to the controlling terminal of our session, the function
tcgetsid() will return the session ID of this session. Otherwise, -1 is returned, and
errno is set appropriately.
ERRORS
-
EBADF
-
fd is not a valid file descriptor.
-
ENOTTY
-
The calling process does not have a controlling terminal, or it has one but it is not described by
fd.
VERSIONS
tcgetsid() is provided in glibc since version 2.1.
CONFORMING TO
POSIX.1-2001.
NOTES
This function is implemented via the
TIOCGSID
ioctl(2), present since Linux 2.1.71.
SEE ALSO
getsid(2)
COLOPHON
This page is part of release 3.53 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/.