fix more problems with strings that contain nulls but shouldn't

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3994 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

 CVS code -
 - General:
 	- Miscellaneous comment fixes. (DLR)
+- browser.c:
+  do_browser()
+	- Properly handle directories that contain nulls. (DLR)
 - files.c:
   do_insertfile()
 	- Properly handle filenames and executable commands that contain

src/browser.c

@@ -231,7 +231,9 @@ char *do_browser(char *path, DIR *dir)
 #endif
 		bottombars(browser_list);
 
-		if (i < 0) {
+		/* If the directory begins with a newline (i.e. an
+		 * encoded null), treat it as though it's blank. */
+		if (i < 0 || answer[0] == '\n') {
 		    /* We canceled.  Indicate that on the statusbar, and
 		     * blank out ans, since we're done with it. */
 		    statusbar(_("Cancelled"));
@@ -251,6 +253,11 @@ char *do_browser(char *path, DIR *dir)
 		 * with it. */
 		ans = mallocstrcpy(ans, "");
 
+		/* Convert newlines to nulls, just before we go to the
+		 * directory. */
+		sunder(answer);
+		align(&answer);
+
 		new_path = real_dir_from_tilde(answer);
 
 		if (new_path[0] != '/') {

src/files.c

@@ -739,7 +739,7 @@ void do_insertfile(
 	    statusbar(_("Cancelled"));
 	    break;
 	} else {
-	    size_t pww_save = openfile->placewewant, answer_len;
+	    size_t pww_save = openfile->placewewant;
 
 	    ans = mallocstrcpy(ans, answer);
 
@@ -802,11 +802,10 @@ void do_insertfile(
 	    }
 #endif
 
-	    answer_len = strlen(answer);
-
-	    /* Convert newlines to nulls, just before we insert a file
-	     * or execute a command. */
+	    /* Convert newlines to nulls, just before we insert the file
+	     * or execute the command. */
 	    sunder(answer);
+	    align(&answer);
 
 #ifndef NANO_TINY
 	    if (execute) {
@@ -842,10 +841,6 @@ void do_insertfile(
 	    }
 #endif
 
-	    /* Convert nulls to newlines.  answer_len is answer's real
-	     * length. */
-	    unsunder(answer, answer_len);
-
 #ifdef ENABLE_MULTIBUFFER
 	    if (ISSET(MULTIBUFFER))
 		/* Update the screen to account for the current
@@ -1885,17 +1880,28 @@ int do_writeout(bool exiting)
 #endif
 
 	    if (append == OVERWRITE) {
-		char *full_answer = get_full_path(answer);
-		char *full_filename = get_full_path(openfile->filename);
-		bool different_name = (strcmp(full_answer,
-			full_filename) != 0);
+		size_t answer_len = strlen(answer);
+		bool name_exists, different_name;
+		char *full_answer, *full_filename;
 		struct stat st;
-		bool name_exists;
 
-		free(full_filename);
-		free(full_answer);
+		/* Convert newlines to nulls, just before we get the
+		 * full path. */
+		sunder(answer);
 
 		name_exists = (stat(answer, &st) != -1);
+		full_answer = get_full_path(answer);
+
+		/* Convert nulls to newlines.  answer_len is the
+		 * string's real length. */
+		unsunder(answer, answer_len);
+
+		full_filename = get_full_path(openfile->filename);
+		different_name = (strcmp(full_answer,
+			full_filename) != 0);
+
+		free(full_filename);
+		free(full_answer);
 
 		if (different_name) {
 		    if (name_exists) {
@@ -1927,6 +1933,11 @@ int do_writeout(bool exiting)
 		}
 	    }
 
+	    /* Convert newlines to nulls, just before we save the
+	     * file. */
+	    sunder(answer);
+	    align(&answer);
+
 #ifndef NANO_TINY
 	    /* Here's where we allow the selected text to be written to
 	     * a separate file.  If we're using restricted mode, this is