1TCGETSID(3P)               POSIX Programmer's Manual              TCGETSID(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       tcgetsid — get the process group ID for the session leader for the con‐
13       trolling terminal
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SYNOPSIS

16       #include <termios.h>
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18       pid_t tcgetsid(int fildes);
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DESCRIPTION

21       The  tcgetsid()  function shall obtain the process group ID of the ses‐
22       sion for which the terminal specified by fildes is the controlling ter‐
23       minal.
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RETURN VALUE

26       Upon  successful  completion, tcgetsid() shall return the process group
27       ID of the session associated with the terminal. Otherwise, a  value  of
28       -1 shall be returned and errno set to indicate the error.
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ERRORS

31       The tcgetsid() function shall fail if:
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33       EBADF  The fildes argument is not a valid file descriptor.
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35       ENOTTY The calling process does not have a controlling terminal, or the
36              file is not the controlling terminal.
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38       The following sections are informative.
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EXAMPLES

41       None.
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APPLICATION USAGE

44       None.
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RATIONALE

47       None.
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FUTURE DIRECTIONS

50       None.
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SEE ALSO

53       The Base Definitions volume of POSIX.1‐2017, <termios.h>
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56       Portions of this text are reprinted and reproduced in  electronic  form
57       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
58       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
59       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
60       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
61       event of any discrepancy between this version and the original IEEE and
62       The Open Group Standard, the original IEEE and The Open Group  Standard
63       is  the  referee document. The original Standard can be obtained online
64       at http://www.opengroup.org/unix/online.html .
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66       Any typographical or formatting errors that appear  in  this  page  are
67       most likely to have been introduced during the conversion of the source
68       files to man page format. To report such errors,  see  https://www.ker‐
69       nel.org/doc/man-pages/reporting_bugs.html .
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73IEEE/The Open Group                  2017                         TCGETSID(3P)
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