--- unix/uudeview.c
+++ unix/uudeview.c
@@ -443,18 +443,46 @@
   FILE *target;
   size_t bytes;
   int res;
+#define HAVE_MKSTEMP
+#ifdef HAVE_MKSTEMP
+  int tmpfd;
+  const char *tmpprefix = "uuXXXXXX";
+  char *tmpdir = NULL;
+#endif /* HAVE_MKSTEMP */
 
   if (stdinput) {
     fprintf (stderr, "proc_stdin: cannot process stdin twice\n");
     return 0;
   }
 
+#ifdef HAVE_MKSTEMP
+  if ((getuid()==geteuid()) && (getgid()==getegid())) {
+	tmpdir=getenv("TMPDIR");
+  }
+
+  if (!tmpdir) {
+	tmpdir = "/tmp";
+  }
+  stdfile = malloc(strlen(tmpdir)+strlen(tmpprefix)+2);
+
+  if (!stdfile) {
+#else
   if ((stdfile = tempnam (NULL, "uu")) == NULL) {
+#endif
     fprintf (stderr, "proc_stdin: cannot get temporary file\n");
     return 0;
   }
 
-  if ((target = fopen (stdfile, "wb")) == NULL) {
+#ifdef HAVE_MKSTEMP
+  strcpy(stdfile, tmpdir);
+  strcat(stdfile, "/");
+  strcat(stdfile, tmpprefix);
+
+  if ((tmpfd = mkstemp(stdfile)) == -1 ||
+	  (target = fdopen(tmpfd, "wbx")) == NULL) {
+#else
+  if ((target = fopen (stdfile, "wbx")) == NULL) {
+#endif
     fprintf (stderr, "proc_stdin: cannot open temp file %s for writing: %s\n",
 	     stdfile, strerror (errno));
     _FP_free (stdfile);
@@ -657,9 +685,6 @@
     else switch (*(argv[number] + 1)) {
     case '\0':
       interact = 0;
-      if (overwrite == 0) {
-	overwrite = 1;
-      }
       proc_stdin ();
       break;
     case 'a':
@@ -699,10 +724,7 @@
 	fprintf (stderr, "WARNING: cannot interact when reading from stdin\n");
       }
       else {
-	interact  = (*argv[number] == '+') ? 1 : 0;
-	if (overwrite == 0 && *argv[number] == '-') {
-	  overwrite = 1;
-	}
+	interact = (*argv[number] == '+') ? 1 : 0;
       }
       break;
     case 'm':
@@ -773,6 +795,8 @@
       break;
     }
   }
+  if (overwrite == 0 && interact == 0 && autoren == 0)
+    overwrite = 1;
 
   return 1;
 }