ctermid - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMEctermid − get controlling terminal name

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LIBRARYStandard C library (libc, −lc)

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SYNOPSIS#include <stdio.h> char *ctermid(char *s);Feature Test Macro Requirements for glibc (see feature_test_macros(7)): ctermid(): _POSIX_C_SOURCE

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DESCRIPTIONctermid() 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.

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RETURN VALUEThe pointer to the pathname.

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue ctermid() Thread safetyMT-Safe

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

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BUGSThe returned pathname 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.

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SEE ALSOttyname(3) 0

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