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Command: tcgetsid | Section: 3 | Source: MINIX | File: tcgetsid.3
TCGETSID(3) FreeBSD Library Functions Manual TCGETSID(3)
NAME
tcgetsid - get session ID associated with a controlling terminal
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#include <unistd.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 conforms to X/Open Portability Guide Issue 4,
Version 2 ("XPG4.2").
FreeBSD 14.1-RELEASE-p8 February 13, 1998 FreeBSD 14.1-RELEASE-p8