NAME
tcgetsid
- get session ID associated with a controlling terminal
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
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'') .