Reorganise, make it just one function, remove -v option it didnt work properly anyway...

[oweals/busybox.git] / coreutils / ln.c

diff --git a/coreutils/ln.c b/coreutils/ln.c
index 3e87b579e7e9a0a4fa15ef1d3624aa06fd18f6a4..427ffcc6ee2d8f7d1447ef4c5021993f35593466 100644 (file)
--- a/coreutils/ln.c
+++ b/coreutils/ln.c
@@ -1,52 +1,133 @@
-#include "internal.h"
+/* vi: set sw=4 ts=4: */
+/*
+ * Mini ln implementation for busybox
+ *
+ * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
+ * Copyright (C) 1999,2000,2001 by Erik Andersen <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 <stdio.h>
-#include <sys/stat.h>
-#include <sys/param.h>
+#include <dirent.h>
+#include <string.h>
+#include <stdlib.h>
 #include <errno.h>
+#include <unistd.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";
+static const int LN_SYMLINK = 1;
+static const int LN_FORCE = 2;
+static const int LN_NODEREFERENCE = 4;
 
-int
-ln_fn(const struct FileInfo * i)
+/*
+ * linkDestName is where the link points to,
+ * linkSrcName is the name of the link to be created.
+ */
+static int fs_link(const char *link_destname, const char *link_srcname, 
+               const int flag)
 {
-       int                             status = 0;
-       char                    d[PATH_MAX];
-       const char *    destination = i->destination;
+       int status;
+       int src_is_dir;
+       char *src_name = 0;
+       const char *src;
 
-       if ( !i->makeSymbolicLink && (i->stat.st_mode & S_IFMT) == S_IFDIR ) {
-               fprintf(stderr, "Please use \"ln -s\" to link directories.\n");
-               return 1;
-       }
+       if (link_destname==NULL)
+               return(FALSE);
 
-       /*
-        * 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 (link_srcname==NULL)
+               src = link_destname;
+       else
+               src = link_srcname;
 
-       if ( i->force )
-               status = ( unlink(destination) && errno != ENOENT );
+       if (flag&LN_NODEREFERENCE)
+               src_is_dir = is_directory(src, TRUE, NULL);
+       else
+               src_is_dir = is_directory(src, FALSE, NULL);
+       
+       if ((src_is_dir==TRUE)&&((flag&LN_NODEREFERENCE)==0)) {
+               char* srcdir_name;
 
-       if ( status == 0 ) {
-               if ( i->makeSymbolicLink )
-                       status = symlink(i->source, destination);
-               else
-                       status = link(i->source, destination);
+               srcdir_name = xstrdup(link_destname);
+               src_name = concat_path_file(src, get_last_path_component(srcdir_name));
+               src = src_name;
+               free(srcdir_name);
        }
+       
+       if (flag&LN_FORCE)
+               unlink(src);
+               
+       if (flag&LN_SYMLINK)
+               status = symlink(link_destname, src);
+       else
+               status = link(link_destname, src);
 
-       if ( status != 0 ) {
-               name_and_error(destination);
-               return 1;
+       if (status != 0) {
+               perror_msg(src);
+               status = FALSE;
+       } else {
+               status = TRUE;
        }
-       else
-               return 0;
+       free(src_name);
+       return status;
 }
+
+extern int ln_main(int argc, char **argv)
+{
+       int status = EXIT_SUCCESS;
+       int flag = 0;
+       int opt;
+       
+       /* Parse any options */
+       while ((opt=getopt(argc, argv, "sfn")) != -1) {
+               switch(opt) {
+                       case 's':
+                               flag |= LN_SYMLINK;
+                               break;
+                       case 'f':
+                               flag |= LN_FORCE;
+                               break;
+                       case 'n':
+                               flag |= LN_NODEREFERENCE;
+                               break;
+                       default:
+                               show_usage();
+               }
+       }
+       if (optind > (argc-1)) {
+               show_usage();
+       } 
+       if (optind == (argc-1)) {
+               if (fs_link(argv[optind], 
+                                       get_last_path_component(argv[optind]), flag)==FALSE)
+                       status = EXIT_FAILURE;
+       }
+       while(optind<(argc-1)) {
+               if (fs_link(argv[optind], argv[argc-1], flag)==FALSE)
+                       status = EXIT_FAILURE;
+               optind++;
+       }
+       return status;
+}
+
+/*
+Local Variables:
+c-file-style: "linux"
+c-basic-offset: 4
+tab-width: 4
+End:
+*/