uniq: always store previous line length
A bug was introduced in the NUL support refactor leading to
the length of the previous line only being saved if the
previous line was shorter than the current line. If triggered
this lead to copying too much data into the previous line buffer.
Behavior before:
printf '1234\na\n' | ./uniq
1234
a
4
Behavior after:
printf '1234\na\n' | ./uniq
1234
a
diff --git a/uniq.c b/uniq.c
index 4f35d05..f1ad6a7 100644
--- a/uniq.c
+++ b/uniq.c
@@ -62,9 +62,9 @@
if (l) {
if (!prevl.data || l->len >= prevl.len) {
- prevl.len = l->len;
- prevl.data = erealloc(prevl.data, prevl.len);
+ prevl.data = erealloc(prevl.data, l->len);
}
+ prevl.len = l->len;
memcpy(prevl.data, l->data, prevl.len);
prevoff = loff;
}
