annotate toys/posix/tty.c @ 1775:57f2a26fa92c draft toast

To ensure that toybox can be installed alongside busybox without confusing update-alternatives, the paths of the links installed by toybox should match those installed by busybox. This is accomplished by changing the flags of a few tools within toybox.
author Paul Barker <paul@paulbarker.me.uk>
date Sat, 04 Apr 2015 11:58:06 -0500
parents bd1225873eb4
children
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1 /* tty.c - Show stdin's terminal name
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2 *
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3 * Copyright 2011 Rob Landley <rob@landley.net>
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4 *
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5 * See http://opengroup.org/onlinepubs/9699919799/utilities/tty.html
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6
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7 USE_TTY(NEWTOY(tty, "s", TOYFLAG_USR|TOYFLAG_BIN))
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8
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9 config TTY
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10 bool "tty"
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11 default y
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12 help
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13 usage: tty [-s]
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14
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15 Show filename of terminal connected to stdin.
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17 Prints "not a tty" and exits with nonzero status if no terminal
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18 is connected to stdin.
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19
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20 -s silent, exit code only
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21 */
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23 #include "toys.h"
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24
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25 void tty_main(void)
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26 {
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27 char *tty = ttyname(0);
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29 if (!toys.optflags) puts(tty ? tty : "not a tty");
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31 toys.exitval = !tty;
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32 }