Usage is only printed if -h option is set. However it's nice to
do it when wrong option is set or the number of argument is wrong.
Signed-off-by: Satoru Takeuchi <takeuchi_satoru@xxxxxxxxxxxxxx>
---
btrfs-crc.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/btrfs-crc.c b/btrfs-crc.c
index 86dfe05..55a4c61 100644
--- a/btrfs-crc.c
+++ b/btrfs-crc.c
@@ -22,7 +22,7 @@
#include "crc32c.h"
#include "utils.h"
-void print_usage(void)
+void print_usage(int status)
{
printf("usage: btrfs-crc filename\n");
printf(" print out the btrfs crc for \"filename\"\n");
@@ -30,7 +30,7 @@ void print_usage(void)
printf(" brute force search for file names with the given crc\n");
printf(" -s seed the random seed (default: random)\n");
printf(" -l length the length of the file names (default: 10)\n");
- exit(1);
+ exit(status);
}
int main(int argc, char **argv)
@@ -57,9 +57,9 @@ int main(int argc, char **argv)
seed = atol(optarg);
break;
case 'h':
- print_usage();
+ print_usage(1);
case '?':
- return 255;
+ print_usage(255);
}
}
@@ -68,7 +68,7 @@ int main(int argc, char **argv)
if (!loop) {
if (check_argc_min(argc - optind, 1))
- return 255;
+ print_usage(255);
printf("%12u - %s\n", crc32c(~1, str, strlen(str)), str);
return 0;
--
2.5.5
--
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