TCGETSID
Section: Linux Programmer's Manual (3)
Updated: 2021-03-22
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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 to indicate the error.
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.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
tcgetsid()
| Thread safety | MT-Safe
|
CONFORMING TO
POSIX.1-2001, POSIX.1-2008.
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 5.11 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
https://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- VERSIONS
-
- ATTRIBUTES
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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Time: 06:22:48 GMT, May 09, 2021