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btrfs-progs: deal with invalid option combinations for btrfs-image

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For btrfs-image,
	dump 	may not come with option '-o'
	-r	may not come with option '-c', '-s', '-w', dev_cnt != 1
	-m	may not come with dev_cnt < 2
All of the above should be regarded as invalid combinations,
and the usage will show up.

Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Gui Hecheng 2014-06-24 11:16:12 +08:00 committed by David Sterba
parent 729c0da103
commit 08b0fdced1
1 changed files with 22 additions and 6 deletions
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28
btrfs-image.c
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@ -2463,6 +2463,7 @@ int main(int argc, char *argv[])
int ret;
int sanitize = 0;
int dev_cnt = 0;
int usage_error = 0;
FILE *out;
while (1) {
@ -2501,15 +2502,30 @@ int main(int argc, char *argv[])
}
}
if ((old_restore) && create)
print_usage();
argc = argc - optind;
dev_cnt = argc - 1;
if (multi_devices && dev_cnt < 2)
print_usage();
if (!multi_devices && dev_cnt != 1)
if (create) {
if (old_restore) {
fprintf(stderr, "Usage error: create and restore cannot be used at the same time\n");
usage_error++;
}
} else {
if (walk_trees || sanitize || compress_level) {
fprintf(stderr, "Usage error: use -w, -s, -c options for restore makes no sense\n");
usage_error++;
}
if (multi_devices && dev_cnt < 2) {
fprintf(stderr, "Usage error: not enough devices specified for -m option\n");
usage_error++;
}
if (!multi_devices && dev_cnt != 1) {
fprintf(stderr, "Usage error: accepts only 1 device without -m option\n");
usage_error++;
}
}
if (usage_error)
print_usage();
source = argv[optind];