Compare string lengths when parsing the snapshot mask
We used to rely on the result from strncmp() without comparing the length of
the strings involved. Even worse, any single-character format specifier would
enable zip-format due to the optional '.'-prefix since the length of the
mask then would become zero.
Noticed-by: Evan Martin <sys@neugierig.org>
Signed-off-by: Lars Hjemli <hjemli@gmail.com>
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 4d1aa88..dfedd8f 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -130,7 +130,7 @@
{
const struct snapshot_archive_t* sat;
static const char *delim = " \t,:/|;";
- int f, tl, rv = 0;
+ int f, tl, sl, rv = 0;
/* favor legacy setting */
if(atoi(str))
@@ -142,8 +142,9 @@
break;
for(f=0; f<snapshot_archives_len; f++) {
sat = &snapshot_archives[f];
- if(!(strncmp(sat->suffix, str, tl) &&
- strncmp(sat->suffix+1, str, tl-1))) {
+ sl = strlen(sat->suffix);
+ if((tl == sl && !strncmp(sat->suffix, str, tl)) ||
+ (tl == sl-1 && !strncmp(sat->suffix+1, str, tl-1))) {
rv |= sat->bit;
break;
}