fix resizing while the alternate spell checker is running

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2935 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -173,6 +173,10 @@ CVS code -
 	  no longer needed, and make the error message more similar to
 	  what the internal spell checker returns under the same
 	  circumstances. (DLR)
+	- Set the SIGWINCH handler back to the default just before
+	  running the alternate spell checker, so that the alternate
+	  spell checker can handle them, and set it back afterwards.
+	  (DLR)
   do_spell()
 	- When displaying an error message from do_(int|alt)_speller(),
 	  don't display the error message corresponding to errno if

src/text.c

@@ -1846,6 +1846,8 @@ const char *do_alt_speller(char *tempfile_name)
     size_t totsize_save = openfile->totsize;
 	/* Our saved value of totsize, used when we spell-check a marked
 	 * selection. */
+    struct sigaction newaction, oldaction;
+	/* Original and temporary handlers for SIGWINCH. */
 
     if (old_mark_set) {
 	/* If the mark is on, save the number of the line it starts on,
@@ -1872,6 +1874,13 @@ const char *do_alt_speller(char *tempfile_name)
     }
     spellargs[arglen - 2] = tempfile_name;
 
+    /* Save the original SIGWINCH handler, and set the SIGWINCH handler
+     * back to the default, so that the alternate spell checker can
+     * handle a SIGWINCH its own way. */
+    sigaction(SIGWINCH, NULL, &newaction);
+    newaction.sa_handler = SIG_DFL;
+    sigaction(SIGWINCH, &newaction, &oldaction);
+
     /* Start a new process for the alternate speller. */
     if ((pid_spell = fork()) == 0) {
 	/* Start alternate spell program; we are using PATH. */
@@ -1888,6 +1897,9 @@ const char *do_alt_speller(char *tempfile_name)
     /* Wait for alternate speller to complete. */
     wait(&alt_spell_status);
 
+    /* Set the SIGWINCH handler back to the original. */
+    sigaction(SIGWINCH, &oldaction, NULL);
+
     refresh();
 
     /* Restore the terminal to its previous state. */