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authorBrian Norris <computersforpeace@gmail.com>2011-12-02 09:46:12 -0800
committerArtem Bityutskiy <Artem.Bityutskiy@intel.com>2011-12-05 08:27:31 +0200
commit4e37713af46f289eac21ca24d2e7d50aed014237 (patch)
treead897f947004df1cb97b16911e3cbd424262b36d /nandtest.c
parent1cf7295ecd343090e7327bade716f25e0bf737cb (diff)
nandtest: seed random generator with time
If a seed is not provided via --seed, we use the default rand() values, which produces the same sequence of values every run. Since this is undesirable, we should choose a random seed via the current time(). Note that this patch moves the srand() until after all the initial options processing. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@intel.com>
Diffstat (limited to 'nandtest.c')
-rw-r--r--nandtest.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/nandtest.c b/nandtest.c
index b3aacaf..0187b87 100644
--- a/nandtest.c
+++ b/nandtest.c
@@ -140,6 +140,8 @@ int main(int argc, char **argv)
uint32_t offset = 0;
uint32_t length = -1;
+ seed = time(NULL);
+
for (;;) {
static const char *short_options="hkl:mo:p:s:";
static const struct option long_options[] = {
@@ -173,7 +175,6 @@ int main(int argc, char **argv)
case 's':
seed = atol(optarg);
- srand(seed);
break;
case 'p':
@@ -244,6 +245,8 @@ int main(int argc, char **argv)
printf("Bad blocks : %d\n", oldstats.badblocks);
printf("BBT blocks : %d\n", oldstats.bbtblocks);
+ srand(seed);
+
for (pass = 0; pass < nr_passes; pass++) {
loff_t test_ofs;