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Command: tcgetsid | Section: 3 | Source: OpenBSD | File: tcgetsid.3
TCGETSID(3) FreeBSD Library Functions Manual TCGETSID(3)
NAME
tcgetsid - get session ID associated with a controlling terminal
SYNOPSIS
#include <termios.h>
pid_t
tcgetsid(int fd);
DESCRIPTION
The tcgetsid() function returns the value of the session ID associated
with the specified controlling terminal device. The session ID is
defined as the process group ID of the session leader.
ERRORS
If an error occurs, tcgetsid() returns -1 and the global variable errno
is set to indicate the error, as follows:
[EBADF] The fd argument is not a valid file descriptor.
[ENOTTY] The calling process does not have a controlling
terminal or the underlying terminal device represented
by fd is not the controlling terminal.
SEE ALSO
getsid(2), setsid(2), tcgetpgrp(3)
STANDARDS
The tcgetsid() function is compliant with the IEEE Std 1003.1-2008
("POSIX.1") specification.
HISTORY
The tcgetsid() function has been available since OpenBSD 5.5.
FreeBSD 14.1-RELEASE-p8 January 12, 2023 FreeBSD 14.1-RELEASE-p8