67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini readlink implementation for busybox
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*
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* Copyright (C) 2000,2001 Matt Kraai <kraai@alumni.carnegiemellon.edu>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include "busybox.h"
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#ifdef CONFIG_FEATURE_READLINK_FOLLOW
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# define READLINK_FOLLOW "f"
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# define READLINK_FLAG_f (1 << 0)
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#else
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# define READLINK_FOLLOW ""
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#endif
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static const char readlink_options[] = READLINK_FOLLOW;
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int readlink_main(int argc, char **argv)
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{
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char *buf = NULL;
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unsigned long opt = bb_getopt_ulflags(argc, argv, readlink_options);
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#ifdef CONFIG_FEATURE_READLINK_FOLLOW
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RESERVE_CONFIG_BUFFER(resolved_path, PATH_MAX);
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#endif
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/* no options, no getopt */
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if (optind + 1 != argc)
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bb_show_usage();
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#ifdef CONFIG_FEATURE_READLINK_FOLLOW
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if (opt & READLINK_FLAG_f) {
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buf = realpath(argv[optind], resolved_path);
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} else
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#endif
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buf = xreadlink(argv[optind]);
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if (!buf)
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return EXIT_FAILURE;
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puts(buf);
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#ifdef CONFIG_FEATURE_CLEAN_UP
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free(buf);
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#endif
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return EXIT_SUCCESS;
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}
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