don't allow filenames entered at the "Write File" prompt or the "Insert

File" prompt to contain nulls


git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@3971 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

 CVS code -
 - General:
 	- Miscellaneous comment fixes. (DLR)
+	- Don't allow filenames entered at the "Write File" prompt or
+	  the "Insert File" prompt to contain nulls.  Changes to
+	  do_statusbar_input(), do_statusbar_output(), and
+	  do_statusbar_verbatim_input(). (DLR)
 - nano.h:
 	- Rename NANO_ALT_REPLACE_KEY to NANO_REPLACE_ALTKEY, for
 	  consistency. (DLR)

src/nano.c

@@ -1553,14 +1553,13 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
     current_len = strlen(openfile->current->data);
 
     while (i < output_len) {
-	/* If allow_cntrls is FALSE, filter out nulls and newlines,
-	 * since they're ASCII control characters. */
-	if (allow_cntrls) {
-	    /* Null to newline, if needed. */
-	    if (output[i] == '\0')
+	/* Null to newline, if needed, and if allow_cntrls is TRUE. */
+	if (output[i] == '\0') {
+	    if (allow_cntrls)
 		output[i] = '\n';
-	    /* Newline to Enter, if needed. */
-	    else if (output[i] == '\n') {
+	/* Newline to Enter, if needed, and if allow_cntrls is TRUE. */
+	} else if (output[i] == '\n') {
+	    if (allow_cntrls) {
 		do_enter();
 		i++;
 		continue;
@@ -1579,7 +1578,7 @@ void do_output(char *output, size_t output_len, bool allow_cntrls)
 	    continue;
 
 	/* If the NO_NEWLINES flag isn't set, when a character is
-	 * added to the magicline, it means we need a new magicline! */
+	 * added to the magicline, it means we need a new magicline. */
 	if (!ISSET(NO_NEWLINES) && openfile->filebot ==
 		openfile->current)
 	    new_magicline();

src/prompt.c

@@ -145,7 +145,7 @@ int do_statusbar_input(bool *meta_key, bool *func_key, bool *s_or_t,
 	 if (*s_or_t || get_key_buffer_len() == 0) {
 	    if (kbinput != NULL) {
 		/* Display all the characters in the input buffer at
-		 * once, filtering out control characters. */
+		 * once, filtering out control characters and nulls. */
 		char *output = charalloc(kbinput_len + 1);
 		size_t i;
 		bool got_enter;
@@ -156,7 +156,7 @@ int do_statusbar_input(bool *meta_key, bool *func_key, bool *s_or_t,
 		output[i] = '\0';
 
 		do_statusbar_output(output, kbinput_len, &got_enter,
-			FALSE);
+			FALSE, FALSE);
 
 		free(output);
 
@@ -312,11 +312,11 @@ bool do_statusbar_mouse(void)
 #endif
 
 /* The user typed output_len multibyte characters.  Add them to the
- * statusbar prompt, setting got_enter to TRUE if we get a newline, and
- * filtering out all ASCII control characters if allow_cntrls is
- * TRUE. */
+ * statusbar prompt, setting got_enter to TRUE if we get a newline,
+ * filtering out all ASCII control characters if allow_cntrls is TRUE,
+ * and filtering out all nulls if allow_nulls is TRUE. */
 void do_statusbar_output(char *output, size_t output_len, bool
-	*got_enter, bool allow_cntrls)
+	*got_enter, bool allow_cntrls, bool allow_nulls)
 {
     size_t answer_len, i = 0;
     char *char_buf = charalloc(mb_cur_max());
@@ -328,14 +328,14 @@ void do_statusbar_output(char *output, size_t output_len, bool
     *got_enter = FALSE;
 
     while (i < output_len) {
-	/* If allow_cntrls is FALSE, filter out nulls and newlines,
-	 * since they're ASCII control characters. */
-	if (allow_cntrls) {
-	    /* Null to newline, if needed. */
-	    if (output[i] == '\0')
+	/* Null to newline, if needed, and if allow_cntrls and
+	 * allow_nulls are TRUE. */
+	if (output[i] == '\0') {
+	    if (allow_cntrls && allow_nulls)
 		output[i] = '\n';
-	    /* Newline to Enter, if needed. */
-	    else if (output[i] == '\n') {
+	/* Newline to Enter, if needed, and if allow_cntrls is TRUE. */
+	} else if (output[i] == '\n') {
+	    if (allow_cntrls) {
 		/* Set got_enter to TRUE to indicate that we got the
 		 * Enter key, put back the rest of the characters in
 		 * output so that they can be parsed and output again,
@@ -352,9 +352,10 @@ void do_statusbar_output(char *output, size_t output_len, bool
 	i += char_buf_len;
 
 	/* If allow_cntrls is FALSE, filter out an ASCII control
-	 * character. */
-	if (!allow_cntrls && is_ascii_cntrl_char(*(output + i -
-		char_buf_len)))
+	 * character.  If allow_nulls is FALSE, filter out a null. */
+	if ((!allow_cntrls && is_ascii_cntrl_char(*(output + i -
+		char_buf_len))) || (!allow_nulls && *(output + i -
+		char_buf_len) == '\0'))
 	    continue;
 
 	/* More dangerousness fun =) */
@@ -676,14 +677,17 @@ void do_statusbar_verbatim_input(bool *got_enter)
     kbinput = get_verbatim_kbinput(bottomwin, &kbinput_len);
 
     /* Display all the verbatim characters at once, not filtering out
-     * control characters. */
+     * control characters, and not filtering out nulls unless we're at
+     * the "Write File" prompt or the "Insert File" prompt. */
     output = charalloc(kbinput_len + 1);
 
     for (i = 0; i < kbinput_len; i++)
 	output[i] = (char)kbinput[i];
     output[i] = '\0';
 
-    do_statusbar_output(output, kbinput_len, got_enter, TRUE);
+    do_statusbar_output(output, kbinput_len, got_enter, TRUE,
+	currshortcut != writefile_list && currshortcut !=
+	insertfile_list);
 
     free(output);
 }

src/proto.h

@@ -496,7 +496,7 @@ int do_statusbar_input(bool *meta_key, bool *func_key, bool *s_or_t,
 bool do_statusbar_mouse(void);
 #endif
 void do_statusbar_output(char *output, size_t output_len, bool
-	*got_enter, bool allow_cntrls);
+	*got_enter, bool allow_cntrls, bool allow_nulls);
 void do_statusbar_home(void);
 void do_statusbar_end(void);
 void do_statusbar_left(void);