X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=coreutils%2Fln.c;h=229c682185ef029a0bb80deeacc05b30c23d453e;hb=e2e56c7c4129de7d20df42e8239fd304c81ef29b;hp=3e87b579e7e9a0a4fa15ef1d3624aa06fd18f6a4;hpb=cc8ed39b240180b58810784f844e253263594ac3;p=oweals%2Fbusybox.git

diff --git a/coreutils/ln.c b/coreutils/ln.c
index 3e87b579e..229c68218 100644
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -1,52 +1,118 @@
-#include "internal.h"
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ln implementation for busybox
+ *
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.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
+ *
+ */
+
+/* BB_AUDIT SUSv3 compliant */
+/* BB_AUDIT GNU options missing: -d, -F, -i, and -v. */
+/* http://www.opengroup.org/onlinepubs/007904975/utilities/ln.html */
+
 #include <stdio.h>
-#include <sys/stat.h>
-#include <sys/param.h>
+#include <stdlib.h>
+#include <unistd.h>
 #include <errno.h>
+#include "busybox.h"
 
-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";
+#define LN_SYMLINK          1
+#define LN_FORCE            2
+#define LN_NODEREFERENCE    4
+#define LN_BACKUP           8
+#define LN_SUFFIX           16
 
-int
-ln_fn(const struct FileInfo * i)
+int ln_main(int argc, char **argv)
 {
-	int				status = 0;
-	char			d[PATH_MAX];
-	const char *	destination = i->destination;
+	int status = EXIT_SUCCESS;
+	int flag;
+	char *last;
+	char *src_name;
+	char *src;
+	char *suffix = "~";
+	struct stat statbuf;
+	int (*link_func)(const char *, const char *);
 
-	if ( !i->makeSymbolicLink && (i->stat.st_mode & S_IFMT) == S_IFDIR ) {
-		fprintf(stderr, "Please use \"ln -s\" to link directories.\n");
-		return 1;
-	}
+	flag = bb_getopt_ulflags(argc, argv, "sfnbS:", &suffix);
 
-	/*
-	 * 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]);
+	if (argc == optind) {
+		bb_show_usage();
 	}
 
-	if ( i->force )
-		status = ( unlink(destination) && errno != ENOENT );
+	last = argv[argc - 1];
+	argv += optind;
 
-	if ( status == 0 ) {
-		if ( i->makeSymbolicLink )
-			status = symlink(i->source, destination);
-		else
-			status = link(i->source, destination);
+	if (argc == optind + 1) {
+		*--argv = last;
+		last = bb_get_last_path_component(bb_xstrdup(last));
 	}
 
-	if ( status != 0 ) {
-		name_and_error(destination);
-		return 1;
-	}
-	else
-		return 0;
+	do {
+		src_name = NULL;
+		src = last;
+
+		if (is_directory(src,
+						 (flag & LN_NODEREFERENCE) ^ LN_NODEREFERENCE,
+						 NULL)) {
+			src_name = bb_xstrdup(*argv);
+			src = concat_path_file(src, bb_get_last_path_component(src_name));
+			free(src_name);
+			src_name = src;
+		}
+		if (!(flag & LN_SYMLINK) && stat(*argv, &statbuf)) {
+			bb_perror_msg("%s", *argv);
+			status = EXIT_FAILURE;
+			free(src_name);
+			continue;
+		}
+
+		if (flag & LN_BACKUP) {
+				char *backup;
+				backup = bb_xasprintf("%s%s", src, suffix);
+				if (rename(src, backup) < 0 && errno != ENOENT) {
+						bb_perror_msg("%s", src);
+						status = EXIT_FAILURE;
+						free(backup);
+						continue;
+				}
+				free(backup);
+				/*
+				 * When the source and dest are both hard links to the same
+				 * inode, a rename may succeed even though nothing happened.
+				 * Therefore, always unlink().
+				 */
+				unlink(src);
+		} else if (flag & LN_FORCE) {
+			unlink(src);
+		}
+
+		link_func = link;
+		if (flag & LN_SYMLINK) {
+			link_func = symlink;
+		}
+
+		if (link_func(*argv, src) != 0) {
+			bb_perror_msg("%s", src);
+			status = EXIT_FAILURE;
+		}
+
+		free(src_name);
+
+	} while ((++argv)[1]);
+
+	return status;
 }