64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/* $OpenBSD: realpath.c,v 1.1 2021/10/13 15:04:53 kn Exp $ */
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/*
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* Copyright (c) 2021 Klemens Nanni <kn@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <err.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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void __dead
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usage(void)
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{
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fprintf(stderr, "usage: %s [-q] file\n", getprogname());
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exit(1);
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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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int ch, qflag = 0;
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char *buf;
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if (pledge("stdio rpath", NULL) == -1)
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err(1, "pledge");
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while ((ch = getopt(argc, argv, "q")) != -1) {
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switch (ch) {
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case 'q':
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qflag = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc != 1)
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usage();
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buf = realpath(argv[0], NULL);
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if (buf == NULL) {
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if (qflag)
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return (1);
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err(1, "%s", argv[0]);
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}
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printf("%s\n", buf);
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return (0);
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}
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