TCGETSID(3P) POSIX Programmer's Manual TCGETSID(3P)
This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.
tcgetsid — get the process group ID for the session leader for the controlling terminal
#include <termios.h> pid_t tcgetsid(int fildes);
The tcgetsid() function shall obtain the process group ID of the session for which the terminal specified by fildes is the controlling terminal.
Upon successful completion, tcgetsid() shall return the process group ID of the session associated with the terminal. Otherwise, a value of -1 shall be returned and errno set to indicate the error.
The tcgetsid() function shall fail if: EBADF The fildes argument is not a valid file descriptor. ENOTTY The calling process does not have a controlling terminal, or the file is not the controlling terminal. The following sections are informative.
The Base Definitions volume of POSIX.1‐2017, termios.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any
discrepancy between this version and the original IEEE and The
Open Group Standard, the original IEEE and The Open Group
Standard is the referee document. The original Standard can be
obtained online at http://www.opengroup.org/unix/online.html .
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IEEE/The Open Group 2017 TCGETSID(3P)
Pages that refer to this page: termios.h(0p)