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-rw-r--r--core/ln.c89
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-/* ln - link files
- * Copyright (C) 2022 Ferass EL HAFIDI
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the copyright holder nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <unistd.h>
-#include <stdio.h>
-#include <errno.h>
-#include <string.h>
-#include "version.h"
-
-#ifndef COMPILETIME
-#define COMPILETIME
-#endif
-
-int getopt(int argc, char *const argv[], const char *optstring);
-void printUsage();
-
-int main(int argc, char *const argv[]) {
- int argument;
- char param[256], *params = "s", *buffer;
-
- if (argc == 1) {
- printUsage();
- return 1;
- }
- while ((argument = getopt(argc, argv, params)) != -1) {
- if (argument == '?') {
- printUsage();
- return 1;
- }
- param[argument] = argument;
- }
-
- for (int i = 1; i < argc - 1; i++) {
- if (argv[argc - 1][0] == '-') argc--;
- if (argv[i][0] != '-') {
- if (param['f']) remove(argv[argc - 1]);
- if (param['s']) symlink(argv[i], argv[argc - 1]);
- /* The -P option is the default behavior (at least on musl),
- * so no if statement.
- */
- else if (param['L']) {
- readlink(argv[i], buffer, strlen(buffer)); /* Read the link */
- if (errno) return errno;
- link(buffer, argv[argc - 1]);
- }
- else link(argv[i], argv[argc - 1]);
-
- if (errno) return errno;
- }
- }
- return 0;
-}
-
-void printUsage() {
- printf("Ferass' Base System. (%s)\n\n"
- "Usage: ln [-fs] [-P|-L] source_file target_file\n\n"
- "Link files.\n\n"
- "\t-s\tCreate symbolic links instead of hard links\n"
- "\t-f\tIf <target_file> exists, override the file\n"
- "\t-P\tIf <source_file> names a symbolic link, create a hard link to the "
- "symbolic link itself (default)\n"
- "\t-L\tIf <source_file> names a symbolic link, create a hard link to the "
- "file referenced by the symbolic link\n", COMPILETIME);
-}