+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ln implementation for busybox
+ *
+ *
+ * Copyright (C) 1999 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 <sys/stat.h>
-#include <sys/param.h>
+#include <dirent.h>
#include <errno.h>
+#include <sys/param.h> /* for PATH_MAX */
+
+static const char ln_usage[] =
+ "ln [OPTION] TARGET... LINK_NAME|DIRECTORY\n\n"
+ "Create 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";
-const char ln_usage[] = "ln [-s] [-f] original-name additional-name\n"
-"\n"
-"\tAdd a new name that refers to the same file as \"original-name\"\n"
-"\n"
-"\t-s:\tUse a \"symbolic\" link, instead of a \"hard\" link.\n"
-"\t-f:\tRemove existing destination files.\n";
+static int symlinkFlag = FALSE;
+static int removeoldFlag = FALSE;
+static int followLinks = TRUE;
-int
-ln_fn(const struct FileInfo * i)
+extern int ln_main(int argc, char **argv)
{
- int status = 0;
- char d[PATH_MAX];
- const char * destination = i->destination;
+ char *linkName;
+ int linkIntoDirFlag;
- if ( !i->makeSymbolicLink && (i->stat.st_mode & S_IFMT) == S_IFDIR ) {
- fprintf(stderr, "Please use \"ln -s\" to link directories.\n");
- return 1;
+ if (argc < 3) {
+ usage(ln_usage);
}
+ argc--;
+ argv++;
- /*
- * If the destination is a directory, create a file within it.
- */
- if ( is_a_directory(i->destination) ) {
- destination = join_paths(
- d
- ,i->destination
- ,&i->source[i->directoryLength]);
+ /* Parse any options */
+ while (**argv == '-') {
+ while (*++(*argv))
+ switch (**argv) {
+ case 's':
+ symlinkFlag = TRUE;
+ break;
+ case 'f':
+ removeoldFlag = TRUE;
+ break;
+ case 'n':
+ followLinks = FALSE;
+ break;
+ default:
+ usage(ln_usage);
+ }
+ argc--;
+ argv++;
}
- if ( i->force )
- status = ( unlink(destination) && errno != ENOENT );
+ linkName = argv[argc - 1];
- if ( status == 0 ) {
- if ( i->makeSymbolicLink )
- status = symlink(i->source, destination);
- else
- status = link(i->source, destination);
+ if (strlen(linkName) > PATH_MAX) {
+ fprintf(stderr, name_too_long, "ln");
+ exit FALSE;
}
- if ( status != 0 ) {
- name_and_error(destination);
- return 1;
+ linkIntoDirFlag = isDirectory(linkName, TRUE);
+
+ if ((argc > 3) && !linkIntoDirFlag) {
+ fprintf(stderr, not_a_directory, "ln", linkName);
+ exit FALSE;
+ }
+
+ while (argc-- >= 2) {
+ char srcName[PATH_MAX + 1];
+ int nChars, status;
+
+ if (strlen(*argv) > PATH_MAX) {
+ fprintf(stderr, name_too_long, "ln");
+ exit FALSE;
+ }
+
+ if (followLinks == FALSE) {
+ strcpy(srcName, *argv);
+ } else {
+ /* Warning! This can silently truncate if > PATH_MAX, but
+ I don't think that there can be one > PATH_MAX anyway. */
+ nChars = readlink(*argv, srcName, PATH_MAX);
+ 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;
+ }
}
- else
- return 0;
+ exit TRUE;
}