Mercurial > hg > toybox
view toys/tty.c @ 536:2c1cb0d35031
Add lib/portability.h description with explanation of SWAP() macros.
author | Rob Landley <rob@landley.net> |
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date | Fri, 09 Mar 2012 08:33:57 -0600 |
parents | 782859fadd20 |
children |
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/* vi: set sw=4 ts=4: * * 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 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 mode */ #include "toys.h" void tty_main(void) { char *tty = ttyname(0); if (!toys.optflags) puts(tty ? tty : "not a tty"); toys.exitval = !tty; }