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
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.