NAME
tcgetsid - get session ID
SYNOPSIS
R #include <termios.h>
I pid_t tcgetsid(int fd );
DESCRIPTION
The function
R 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
R tcgetsid ()
will return the session ID of this session.
Otherwise, -1 is returned, and
errno
is set appropriately.
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
R fd .
CONFORMING TO
POSIX.1-2001
NOTES
This function is implemented via the
TIOCGSID
ioctl(2),
present
since Linux 2.1.71.
SEE ALSO
ČLÁNKY DO MAILU