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33 lines
606 B
33 lines
606 B
7 months ago
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/* tty.c - Show stdin's terminal name
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*
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* Copyright 2011 Rob Landley <rob@landley.net>
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*
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* See http://opengroup.org/onlinepubs/9699919799/utilities/tty.html
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USE_TTY(NEWTOY(tty, "s", TOYFLAG_USR|TOYFLAG_BIN))
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config TTY
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bool "tty"
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default y
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help
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usage: tty [-s]
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Show filename of terminal connected to stdin.
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Prints "not a tty" and exits with nonzero status if no terminal
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is connected to stdin.
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-s Silent, exit code only
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*/
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#include "toys.h"
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void tty_main(void)
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{
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char *tty = ttyname(0);
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if (!toys.optflags) puts(tty ? tty : "not a tty");
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toys.exitval = !tty;
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}
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