Mercurial > hg > toybox
view toys/posix/tty.c @ 1215:4eaac3e63fa7 draft
Cleanup freeramdisk: tabs to 2 spaces, square brackets for option name, do optional cleanup under if (CFG_TOYBOX_FREE) guard.
author | Rob Landley <rob@landley.net> |
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date | Sun, 09 Mar 2014 14:38:51 -0500 |
parents | bd1225873eb4 |
children |
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/* tty.c - Show stdin's terminal name * * Copyright 2011 Rob Landley <rob@landley.net> * * See http://opengroup.org/onlinepubs/9699919799/utilities/tty.html USE_TTY(NEWTOY(tty, "s", TOYFLAG_USR|TOYFLAG_BIN)) config TTY bool "tty" default y help usage: tty [-s] Show filename of terminal connected to stdin. Prints "not a tty" and exits with nonzero status if no terminal is connected to stdin. -s silent, exit code only */ #include "toys.h" void tty_main(void) { char *tty = ttyname(0); if (!toys.optflags) puts(tty ? tty : "not a tty"); toys.exitval = !tty; }