msghdr.c: fix printing SCM_RIGHTS array
* msghdr.c (print_scm_rights): Do not print array elements outside
bounds defined by struct cmsghdr.cmsg_len.
diff --git a/msghdr.c b/msghdr.c
index b377be9..5ebaeaa 100644
--- a/msghdr.c
+++ b/msghdr.c
@@ -59,20 +59,20 @@
const size_t data_len)
{
const int *fds = cmsg_data;
- const char *end = (const char *) cmsg_data + data_len;
- bool seen = false;
+ const size_t nfds = data_len / sizeof(*fds);
+ size_t i;
- if (sizeof(*fds) > data_len)
+ if (!nfds)
return;
tprints(", cmsg_data=[");
- while ((const char *) fds < end) {
- if (seen)
+
+ for (i = 0; i < nfds; ++i) {
+ if (i)
tprints(", ");
- else
- seen = true;
- printfd(tcp, *fds++);
+ printfd(tcp, fds[i]);
}
+
tprints("]");
}