Linux 2.6 - man page for ctermid (linux section 3)
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CTERMID(3) Linux Programmer's Manual CTERMID(3)
ctermid - get controlling terminal name
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 controlling terminal for
this process. If s is NULL, a static buffer is used, otherwise s points to a buffer used
to hold the terminal pathname. The symbolic constant L_ctermid is the maximum number of
characters 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.
The path returned may not uniquely identify the controlling terminal; it may, for example,
It is not assured that the program can open the terminal.
This page is part of release 3.55 of the Linux man-pages project. A description of the
project, and information about reporting bugs, can be found at
GNU 2013-07-04 CTERMID(3)
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