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
40 lines
546 B
C
40 lines
546 B
C
/* See LICENSE file for copyright and license details. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "util.h"
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extern char **environ;
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static void
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usage(void)
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{
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eprintf("usage: %s [var ...]\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 *var;
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int ret = 0;
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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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for (; *environ; environ++)
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puts(*environ);
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} else {
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for (; *argv; argc--, argv++) {
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if ((var = getenv(*argv)))
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puts(var);
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else
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ret = 1;
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}
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}
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return fshut(stdout, "<stdout>") ? 2 : ret;
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}
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