Table of Contentsctermid - get controlling terminal name #include <stdio.h>
char *ctermid(char *s); 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. POSIX.1 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.
ttyname(3)
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