7250fb6968
This provides a reliable and portable way to test whether an environment variable is defined. (Of course, if you are using glibc you may get false positives if you include a = in the query.) Signed-off-by: Mattias Andrée <maandree@kth.se>
31 lines
466 B
C
31 lines
466 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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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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argv0 = argv[0], argc--, argv++;
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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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