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”).