Okay, we'll use O_EXCL also

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@383 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -3,7 +3,7 @@ CVS code -
   write_file()
 	- Added tmp check to TMP_OPT section (how apropriate).
 	- Added new consistency checking code from securityfocus 
-	  article by Oliver Friedrichs.
+	  article by Oliver Friedrichs, and use O_EXCL if tmp == 1.
 - winio.c:
   edit_add()
 	- Off by one display error (fix by Rocco Corsi).

files.c

@@ -334,7 +334,13 @@ int write_file(char *name, int tmp)
 	 return -1;
     else if (ISSET(FOLLOW_SYMLINKS) || !S_ISLNK(st.st_mode)) {
 
-	fd = open(realname, O_WRONLY | O_CREAT | O_TRUNC,
+	/* Use O_EXCL if tmp == 1, I suppose */
+	if (tmp)
+	    fd = open(realname, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC,
+			S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
+			S_IWOTH);
+	else 
+	    fd = open(realname, O_WRONLY | O_CREAT | O_TRUNC,
 			S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH |
 			S_IWOTH);