Fixed a bunch of stuff:

	* Fixed segfault caused by "touch -c"
	* Fixed segfault caused by "rm -f"
	* Fixed segfault caused by "ln -s -s" and similar abuses.
	* Fixed segfault caused by "cp -a -a" and similar abuses.
	* Implemented "rm -- <foo>"
updated docs accordingly.
 -Erik


git-svn-id: svn://busybox.net/trunk/busybox@613 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 21 insertions, 16 deletions

diff --git a/ln.c b/ln.c
index 29ff93863..d4fa47306 100644
--- a/ln.c
+++ b/ln.c
@@ -59,25 +59,30 @@ extern int ln_main(int argc, char **argv)
         argv++;
 
         /* 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--;
+        while (--argc >= 0 && *argv && **argv) {
+                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);
+                                }
+                }
                 argv++;
         }
 
+        if (argc < 1) {
+                fatalError("ln: missing file argument\n");
+        }
+
         linkName = argv[argc - 1];
 
         if (strlen(linkName) > BUFSIZ) {