--- LKH-2.0/SRC/WriteTour.c.bak	2007-12-28 14:14:48.000000000 +0200
+++ LKH-2.0/SRC/WriteTour.c	2008-04-17 18:00:20.038481332 +0300
@@ -1,3 +1,5 @@
+#include <unistd.h>
+
 #include "LKH.h"
 
 /*
@@ -18,6 +20,9 @@ void WriteTour(char *FileName, int *Tour
     FILE *TourFile;
     int i, j, n, Forwards;
     char *FullFileName;
+    char *tmpbuf;
+    size_t tmplen;
+    int fdtmp;
 
     if (FileName == 0)
         return;
@@ -27,7 +32,11 @@ void WriteTour(char *FileName, int *Tour
                 FileName == TourFileName ? "TOUR_FILE" :
                 FileName == OutputTourFileName ? "OUTPUT_TOUR_FILE" : "",
                 FullFileName);
-    assert(TourFile = fopen(FullFileName, "w"));
+    tmplen = strlen(FullFileName) + 14;
+    assert(tmpbuf = malloc(tmplen));
+    assert(snprintf(tmpbuf, tmplen, "%s.tmp.XXXXXX", FullFileName) < tmplen);
+    assert((fdtmp = mkstemp(tmpbuf)) != -1);
+    assert(TourFile = fdopen(fdtmp, "w"));
     fprintf(TourFile, "NAME : %s." GainFormat ".tour\n", Name, Cost);
     fprintf(TourFile, "COMMENT : Length = " GainFormat "\n", Cost);
     fprintf(TourFile, "COMMENT : Found by LKH [Keld Helsgaun]\n");
@@ -47,10 +56,14 @@ void WriteTour(char *FileName, int *Tour
             i = n;
     }
     fprintf(TourFile, "-1\nEOF\n");
-    fclose(TourFile);
+    assert(fflush(TourFile) == 0);
+    assert(fsync(fileno(TourFile)) == 0);
+    assert(fclose(TourFile) == 0);
+    assert(rename(tmpbuf, FullFileName) == 0);
     if (TraceLevel >= 1)
         printff("done\n");
     free(FullFileName);
+    free(tmpbuf);
 }
 
 /*