1 files changed, 13 insertions, 2 deletions

diff --git a/trace-split.c b/trace-split.c
index d3594ab..4f1d139 100644
--- a/trace-split.c
+++ b/trace-split.c
@@ -404,6 +404,7 @@ void trace_split (int argc, char **argv)
         unsigned long long start_ns = 0, end_ns = 0;
         unsigned long long current;
         double start, end;
+        char *endptr;
         char *output = NULL;
         char *output_file;
         enum split_types split_type = SPLIT_NONE;
@@ -464,14 +465,24 @@ void trace_split (int argc, char **argv)
 
         if (ac >= 2) {
                 optind++;
-                start = strtod(argv[optind], NULL);
+                start = strtod(argv[optind], &endptr);
                 if (ac > 3)
                         usage(argv);
 
+                /* Make sure a true start value was entered */
+                if (*endptr != 0)
+                        die("Start value not floating point: %s", argv[optind]);
+
                 start_ns = (unsigned long long)(start * 1000000000.0);
                 optind++;
                 if (ac == 3) {
-                        end = strtod(argv[optind], NULL);
+                        end = strtod(argv[optind], &endptr);
+
+                        /* Make sure a true end value was entered */
+                        if (*endptr != 0)
+                                die("End value not floating point: %s",
+                                    argv[optind]);
+
                         end_ns = (unsigned long long)(end * 1000000000.0);
                         if (end_ns < start_ns)
                                 die("Error: end is less than start");