1 files changed, 4 insertions, 2 deletions
diff --git a/tools.c b/tools.c
index 68bfb7e..c34a621 100644
--- a/tools.c
+++ b/tools.c
@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.c 1.73 2002/11/09 15:33:47 kls Exp $
+ * $Id: tools.c 1.75 2002/11/24 16:04:57 kls Exp $
  */
 
 #include "tools.h"
@@ -235,6 +235,8 @@ void delay_ms(int ms)
 
 bool isnumber(const char *s)
 {
+  if (!*s)
+     return false;
   while (*s) {
         if (!isdigit(*s))
            return false;
@@ -720,7 +722,7 @@ bool cLockFile::Lock(int WaitSeconds)
            if (errno == EEXIST) {
               struct stat fs;
               if (stat(fileName, &fs) == 0) {
-                 if (time(NULL) - fs.st_mtime > LOCKFILESTALETIME) {
+                 if (abs(time(NULL)) - fs.st_mtime > LOCKFILESTALETIME) {
                     esyslog("ERROR: removing stale lock file '%s'", fileName);
                     if (remove(fileName) < 0) {
                        LOG_ERROR_STR(fileName);