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

NAME

     ctermid - get controlling terminal name

SYNOPSIS

     #include <stdio.h>

     char *ctermid(char *s);

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

     ctermid(): _POSIX_C_SOURCE

DESCRIPTION

     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.

RETURN VALUE

     The pointer to the pathname.

ATTRIBUTES

     For   an   explanation   of   the  terms  used  in  this  section,  see
     attributes(7).

     +----------+---------------+---------+
     |Interface | Attribute     | Value   |
     +----------+---------------+---------+
     |ctermid() | Thread safety | MT-Safe |
     +----------+---------------+---------+

CONFORMING TO

     POSIX.1-2001, POSIX.1-2008, Svr4.

BUGS

     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.

SEE ALSO

     ttyname(3)

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 2016-03-15 CTERMID(3)