Linux 2.6 - man page for tcgetsid (linux section 3posix)
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TCGETSID(P) POSIX Programmer's Manual TCGETSID(P)
tcgetsid - get the process group ID for the session leader for the controlling terminal
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 associated with
the terminal. Otherwise, a value of (pid_t)-1 shall be returned and errno set to indicate
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
The following sections are informative.
The Base Definitions volume of IEEE Std 1003.1-2001, <termios.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE Std
1003.1, 2003 Edition, Standard for Information Technology -- Portable Operating System
Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2003 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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 TCGETSID(P)
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