d2824f5294
This reverts commit 9016d288f1.
Tools that have no options are required by POSIX to support "--" so
that conforming applications have a way to shield their operands from
implementations that provide options as an extension.
echo(1) is just an exception, so it is handled specially.
See OPTIONS in https://pubs.opengroup.org/onlinepubs/9699919799.2018edition/utilities/V3_chap01.html#tag_17_04
32 lines
409 B
C
32 lines
409 B
C
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <unistd.h>
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#include "util.h"
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static void
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usage(void)
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{
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enprintf(2, "usage: %s\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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char *tty;
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ARGBEGIN {
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default:
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usage();
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} ARGEND
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if (argc)
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usage();
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tty = ttyname(STDIN_FILENO);
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puts(tty ? tty : "not a tty");
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enfshut(2, stdout, "<stdout>");
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return !tty;
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}
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