tcgetsid(3) [netbsd man page]

TCGETSID(3)						   BSD Library Functions Manual 					       TCGETSID(3)

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'').

BSD
								 February 13, 1998							       BSD

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

NAME

       tcgetsid - get session ID

SYNOPSIS

       #define _XOPEN_SOURCE 500
       #include <termios.h>

       pid_t tcgetsid(int fd);

DESCRIPTION

       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

       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

       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

       tcgetsid() is provided in glibc since version 2.1.

CONFORMING TO

       POSIX.1-2001.

NOTES

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

SEE ALSO

       getsid(2)

COLOPHON

       This  page is part of release 3.25 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
								    2008-06-14							       TCGETSID(3)