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man:tcgetsid

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

NAME

     tcgetsid - get session ID

SYNOPSIS

     #define _XOPEN_SOURCE 500        /* See feature_test_macros(7) */
     #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.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     +-----------+---------------+---------+
     |Interface  | Attribute     | Value   |
     +-----------+---------------+---------+
     |tcgetsid() | Thread safety | MT-Safe |
     +-----------+---------------+---------+

CONFORMING TO

     POSIX.1-2001, POSIX.1-2008.

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 4.16 of the Linux  man-pages  project.   A
     description  of  the project, information about reporting bugs, and the
     latest    version    of    this    page,    can     be     found     at
     https://www.kernel.org/doc/man-pages/.

GNU 2015-08-08 TCGETSID(3)

/data/webs/external/dokuwiki/data/pages/man/tcgetsid.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

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