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btrfs-progs: btrfs-crc: print usage on receiving invalid arguments

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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@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Satoru Takeuchi 2016-06-02 17:11:51 +09:00 committed by David Sterba
parent ad1295fb04
commit 9e4e17f361
1 changed files with 5 additions and 5 deletions
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10
btrfs-crc.c
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@ -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 = atoll(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;