| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini ln implementation for busybox |
| * |
| * Copyright (C) 1999,2000 by Lineo, inc. |
| * Written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| * |
| */ |
| |
| #include "internal.h" |
| #define BB_DECLARE_EXTERN |
| #define bb_need_name_too_long |
| #define bb_need_not_a_directory |
| #include "messages.c" |
| |
| #include <stdio.h> |
| #include <dirent.h> |
| #include <errno.h> |
| |
| static const char ln_usage[] = |
| "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n" |
| #ifndef BB_FEATURE_TRIVIAL_HELP |
| "\nCreate a link named LINK_NAME or DIRECTORY to the specified TARGET\n\n" |
| "Options:\n" |
| "\t-s\tmake symbolic links instead of hard links\n" |
| |
| "\t-f\tremove existing destination files\n" |
| "\t-n\tno dereference symlinks - treat like normal file\n" |
| #endif |
| ; |
| |
| static int symlinkFlag = FALSE; |
| static int removeoldFlag = FALSE; |
| static int followLinks = TRUE; |
| |
| extern int ln_main(int argc, char **argv) |
| { |
| char *linkName; |
| int linkIntoDirFlag; |
| int stopIt = FALSE; |
| |
| argc--; |
| argv++; |
| |
| /* Parse any options */ |
| while (argc > 0 && stopIt == FALSE) { |
| if (**argv == '-') { |
| while (*++(*argv)) |
| switch (**argv) { |
| case 's': |
| symlinkFlag = TRUE; |
| break; |
| case 'f': |
| removeoldFlag = TRUE; |
| break; |
| case 'n': |
| followLinks = FALSE; |
| break; |
| case '-': |
| stopIt = TRUE; |
| break; |
| default: |
| usage(ln_usage); |
| } |
| argc--; |
| argv++; |
| } |
| else |
| break; |
| } |
| |
| if (argc < 2) { |
| usage(ln_usage); |
| } |
| |
| linkName = argv[argc - 1]; |
| |
| if (strlen(linkName) > BUFSIZ) { |
| fprintf(stderr, name_too_long, "ln"); |
| exit FALSE; |
| } |
| |
| linkIntoDirFlag = isDirectory(linkName, TRUE, NULL); |
| |
| if ((argc > 3) && !linkIntoDirFlag) { |
| fprintf(stderr, not_a_directory, "ln", linkName); |
| exit FALSE; |
| } |
| |
| while (argc-- >= 2) { |
| char srcName[BUFSIZ + 1]; |
| int nChars, status; |
| |
| if (strlen(*argv) > BUFSIZ) { |
| fprintf(stderr, name_too_long, "ln"); |
| exit FALSE; |
| } |
| |
| if (followLinks == FALSE) { |
| strcpy(srcName, *argv); |
| } else { |
| /* Warning! This can silently truncate if > BUFSIZ, but |
| I don't think that there can be one > BUFSIZ anyway. */ |
| nChars = readlink(*argv, srcName, BUFSIZ); |
| srcName[nChars] = '\0'; |
| } |
| |
| if (removeoldFlag == TRUE) { |
| status = (unlink(linkName) && errno != ENOENT); |
| if (status != 0) { |
| perror(linkName); |
| exit FALSE; |
| } |
| } |
| |
| if (symlinkFlag == TRUE) |
| status = symlink(*argv, linkName); |
| else |
| status = link(*argv, linkName); |
| if (status != 0) { |
| perror(linkName); |
| exit FALSE; |
| } |
| } |
| exit TRUE; |
| } |
| |
| /* |
| Local Variables: |
| c-file-style: "linux" |
| c-basic-offset: 4 |
| tab-width: 4 |
| End: |
| */ |