in do_browser(), display an error messsage on the statusbar if we try to

move up from "/" via the "Go to Directory" prompt, for consistency


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3699 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -16,6 +16,9 @@ CVS code -
 	- Remove unneeded call to blank_edit(). (DLR)
 	- After entering "..", select the directory we were in before
 	  instead of the first filename in the list, as Pico does. (DLR)
+	- Display an error messsage on the statusbar if we try to move
+	  up from "/" via the "Go to Directory" prompt, for consistency.
+	  (DLR)
   browser_refresh()
 	- Simplify. (DLR)
 	- Fix problems where translated versions of "(dir)" could be

src/browser.c

@@ -107,7 +107,7 @@ char *do_browser(char *path, DIR *dir)
 	int i;
 	size_t fileline;
 	char *new_path;
-	    /* Used by the "Go To Directory" prompt. */
+	size_t new_path_len;
 
 	/* Compute the line number we're on now, so that we don't divide
 	 * by zero. */
@@ -243,6 +243,7 @@ char *do_browser(char *path, DIR *dir)
 		ans = mallocstrcpy(ans, "");
 
 		new_path = real_dir_from_tilde(answer);
+		new_path_len = strlen(new_path) + 1;
 
 		if (new_path[0] != '/') {
 		    new_path = charealloc(new_path, strlen(path) +
@@ -250,6 +251,16 @@ char *do_browser(char *path, DIR *dir)
 		    sprintf(new_path, "%s%s", path, answer);
 		}
 
+		if (new_path[new_path_len - 1] == '/')
+		    null_at(&new_path, new_path_len - 1);
+
+		/* We can't move up from "/". */
+		if (strcmp(new_path, "/..") == 0) {
+		    statusbar(_("Can't move up a directory"));
+		    beep();
+		    break;
+		}
+
 #ifndef DISABLE_OPERATINGDIR
 		if (check_operating_dir(new_path, FALSE)) {
 		    statusbar(