Originally, btrfstune will fail without any options, like this:
# btrfstune /dev/sdb
An error prompt & usage should show up upon this condition.
Signed-off-by: Gui Hecheng <guihc.fnst@xxxxxxxxxxxxxx>
---
V1 -> V2:
add optind assignment to make reviewers happy;
print error msg if no options provided
---
btrfstune.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/btrfstune.c b/btrfstune.c
index 50724ba..da82f36 100644
--- a/btrfstune.c
+++ b/btrfstune.c
@@ -115,6 +115,7 @@ int main(int argc, char *argv[])
int skinny_flag = 0;
int ret;
+ optind = 1;
while(1) {
int c = getopt(argc, argv, "S:rx");
if (c < 0)
@@ -143,6 +144,13 @@ int main(int argc, char *argv[])
return 1;
}
+ if (!(seeding_flag + extrefs_flag + skinny_flag)) {
+ fprintf(stderr,
+ "ERROR: At least one option should be assigned.\n");
+ print_usage();
+ return 1;
+ }
+
if (check_mounted(device)) {
fprintf(stderr, "%s is mounted\n", device);
return 1;
@@ -176,6 +184,7 @@ int main(int argc, char *argv[])
} else {
root->fs_info->readonly = 1;
ret = 1;
+ fprintf(stderr, "btrfstune failed\n");
}
close_ctree(root);
--
1.8.0.1
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