tcgetsid man page on FreeBSD

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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 <termios.h>

     pid_t
     tcgetsid(int fd);

DESCRIPTION
     The tcgetsid() function returns the process group ID of the session
     leader for a controlling terminal specified by fd.

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 termi‐
			nal or the underlying terminal device represented by
			fd is not the controlling terminal.

SEE ALSO
     getsid(2), setsid(2), tcgetpgrp(3), tcsetsid(3)

STANDARDS
     The tcgetsid() function conforms to X/Open Portability Guide Issue 4,
     Version 2 (“XPG4.2”).

BSD				April 15, 2008				   BSD
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