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

       ctermid - get controlling terminal name

       #include <stdio.h>

       char *ctermid(char *s);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       ctermid(): _POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE

       ctermid()  returns  a string which is the pathname for the current con-
       trolling terminal for this process.  If s is NULL, a static  buffer  is
       used,  otherwise  s  points to a buffer used to hold the terminal path-
       name.  The symbolic constant L_ctermid is the maximum number of charac-
       ters in the returned pathname.

       The pointer to the pathname.

   Multithreading (see pthreads(7))
       The  ctermid()  function  is  thread-safe  with  exceptions.  It is not
       thread-safe if called with a NULL parameter.

       Svr4, POSIX.1-2001.

       The path returned may not uniquely identify the  controlling  terminal;
       it may, for example, be /dev/tty.

       It is not assured that the program can open the terminal.


       This  page  is  part of release 3.74 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

GNU                               2013-07-04                        CTERMID(3)

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