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symlink-trust: -k/--copy-dirlinks, -K/--keep-dirlinks, --munge-links (+real -l/--links)
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Adds symlink-target transmission (File is_symlink+symlink_target, STATUS_SYMLINK
frame, chunk type 2), munge-links sender containment + receiver-side symmetric
target containment, keep-dirlinks confined dir-symlink following (O_NOFOLLOW
realpath-rechecked), and fixes -l to copy symlinks as symlinks. munge_links +
keep_dirlinks cross the wire; copy_dirlinks client-only. PROTOCOL_VERSION
2.12.0->2.13.0. Review fixes: receiver rejects absolute/.. targets, gated unmunge,
-K O_NOFOLLOW+re-fstat, keep_dirlinks set once at config-accept, rel_buf overflow
fails the walk.
This commit is contained in:
TapTap
2026-09-08 22:27:53 +02:00
parent 0de859b302
commit 820188c2cc
22 changed files with 945 additions and 39 deletions
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src/server/receiver.c
+6 -1
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@@ -154,7 +154,8 @@ int receiver_process_pending(Config* config, int file_descriptor, const Receiver
DeleteManifest* deferred_manifest = NULL;
while (status == STATUS_NEXT || status == STATUS_CHUNK || status == STATUS_CHECK ||
status == STATUS_KEEPALIVE || status == STATUS_ABORT || status == STATUS_CHECK_BATCH ||
status == STATUS_MKDIR || status == STATUS_MANIFEST || status == STATUS_HARDLINK) {
status == STATUS_MKDIR || status == STATUS_MANIFEST || status == STATUS_HARDLINK ||
status == STATUS_SYMLINK) {
if (status == STATUS_KEEPALIVE) {
if (!send_status(file_descriptor, STATUS_KEEPALIVE))
goto fail;
@@ -185,6 +186,10 @@ int receiver_process_pending(Config* config, int file_descriptor, const Receiver
File* file = file_receive_hardlink(file_descriptor);
if (!file || !sink->store_file(file, sink->context))
goto receive_error;
} else if (status == STATUS_SYMLINK) {
File* sym = file_receive_symlink(file_descriptor, config);
if (!sym || !sink->store_file(sym, sink->context))
goto receive_error;
} else if (status == STATUS_MANIFEST) {
DeleteManifest* manifest = receive_manifest_entries(file_descriptor);
if (!manifest)