NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

The Linux Programming Interface

TCGETSID(3)                   Linux Programmer's Manual                   TCGETSID(3)

NAME         top

       tcgetsid - get session ID

SYNOPSIS         top

       #define _XOPEN_SOURCE 500        /* See feature_test_macros(7) */
       #include <termios.h>

       pid_t tcgetsid(int fd);

DESCRIPTION         top

       The function 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         top

       When fd refers to the controlling terminal of our session, the function
       tcgetsid() will return the session ID of this session.  Otherwise, -1 is
       returned, and errno is set appropriately.

ERRORS         top

       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 fd.

VERSIONS         top

       tcgetsid() is provided in glibc since version 2.1.

CONFORMING TO         top

       POSIX.1-2001.

NOTES         top

       This function is implemented via the TIOCGSID ioctl(2), present since Linux
       2.1.71.

SEE ALSO         top

       getsid(2)

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

GNU                                   2010-09-10                          TCGETSID(3)

HTML rendering created 2010-12-03 by Michael Kerrisk, author of The Linux Programming Interface