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devices: --devices/--specials/-D/--copy-devices/--write-devices
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Browse Source 
Recreate char/block nodes via mknodat (privilege-gated, EPERM->warn+skip) and
FIFOs via mkfifoat; new STATUS_SPECIAL frame + validated rdev; sockets skipped;
-copy-devices copies st_size; -write-devices O_NOFOLLOW+O_NONBLOCK warn+skip.
preserve_specials/copy_devices/write_devices cross the wire. PROTOCOL_VERSION
2.12.0->2.13.0. Review fixes: -m source-removal keeps recreated specials, FIFO
ENXIO skip, rdev bounds at chunk_deserialize, STATUS_ERROR on receive branch,
scanner_prepare_special dedup.
This commit is contained in:
TapTap
2026-09-08 22:27:53 +02:00
parent 0de859b302
commit 007e8f90f2
23 changed files with 910 additions and 28 deletions
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src/shared/config.c
+22 -12
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@@ -76,6 +76,9 @@ static void config_set_defaults(Config* config) {
config->preserve_xattrs = false;
config->preserve_devices = false;
config->preserve_sparse = false;
config->preserve_specials = false;
config->copy_devices = false;
config->write_devices = false;
config->itemize_changes = false;
config->out_format = NULL;
config->log_file_format = NULL;
@@ -180,16 +183,18 @@ static bool validate_received_config(const Config* config) {
valid_wire_bool(config->safe_links) && valid_wire_bool(config->copy_unsafe_links) &&
valid_wire_bool(config->preserve_hard_links) && valid_wire_bool(config->preserve_acls) &&
valid_wire_bool(config->preserve_xattrs) && valid_wire_bool(config->preserve_devices) &&
valid_wire_bool(config->preserve_sparse) && valid_wire_bool(config->ignore_existing) &&
valid_wire_bool(config->existing) && valid_wire_bool(config->update) &&
valid_wire_bool(config->inplace) && valid_wire_bool(config->append) &&
valid_wire_bool(config->use_fsync) && valid_wire_bool(config->append_verify) &&
valid_wire_bool(config->delete_excluded) && valid_wire_bool(config->force_delete) &&
valid_wire_bool(config->delete_missing_args) && valid_wire_bool(config->delete_after) &&
valid_wire_bool(config->preallocate) && valid_wire_bool(config->delete_delay) &&
valid_wire_bool(config->delete_during) && valid_wire_bool(config->relative) &&
valid_wire_bool(config->prune_empty_dirs) && valid_wire_bool(config->delay_updates) &&
valid_wire_bool(config->mkpath) && !(config->delay_updates && config->inplace) &&
valid_wire_bool(config->preserve_sparse) && valid_wire_bool(config->preserve_specials) &&
valid_wire_bool(config->copy_devices) && valid_wire_bool(config->write_devices) &&
valid_wire_bool(config->ignore_existing) && valid_wire_bool(config->existing) &&
valid_wire_bool(config->update) && valid_wire_bool(config->inplace) &&
valid_wire_bool(config->append) && valid_wire_bool(config->use_fsync) &&
valid_wire_bool(config->append_verify) && valid_wire_bool(config->delete_excluded) &&
valid_wire_bool(config->force_delete) && valid_wire_bool(config->delete_missing_args) &&
valid_wire_bool(config->delete_after) && valid_wire_bool(config->preallocate) &&
valid_wire_bool(config->delete_delay) && valid_wire_bool(config->delete_during) &&
valid_wire_bool(config->relative) && valid_wire_bool(config->prune_empty_dirs) &&
valid_wire_bool(config->delay_updates) && valid_wire_bool(config->mkpath) &&
!(config->delay_updates && config->inplace) &&
!(config->delay_updates && delay_updates_staging_name_conflict(config->backup_dir)) &&
valid_wire_bool(config->partial) && valid_wire_bool(config->delete_before) &&
valid_wire_bool(config->checksum) && valid_wire_bool(config->eight_bit_output) &&
@@ -444,12 +449,16 @@ static bool send_delta_fields(int fd, const Config* c) {
}
static bool send_file_options(int fd, const Config* c) {
/* Device/special preservation flags cross the wire so the receiver knows a
* special/device entry must be recreated. Trailing fields; protocol 2.13.0. */
return send_int(fd, c->backup) && send_str(fd, c->backup_dir ? c->backup_dir : "") &&
send_int(fd, c->remove_source_files) && send_int(fd, c->follow_symlinks) &&
send_int(fd, c->copy_links) && send_int(fd, c->safe_links) &&
send_int(fd, c->copy_unsafe_links) && send_int(fd, c->preserve_hard_links) &&
send_int(fd, c->preserve_acls) && send_int(fd, c->preserve_xattrs) &&
send_int(fd, c->preserve_devices) && send_int(fd, c->preserve_sparse);
send_int(fd, c->preserve_devices) && send_int(fd, c->preserve_sparse) &&
send_int(fd, c->preserve_specials) && send_int(fd, c->copy_devices) &&
send_int(fd, c->write_devices);
}
static bool send_selection_options(int fd, const Config* c) {
@@ -569,7 +578,8 @@ static bool receive_file_options(int fd, Config* c) {
return false;
bool* flags[] = {&c->follow_symlinks, &c->copy_links, &c->safe_links,
&c->copy_unsafe_links, &c->preserve_hard_links, &c->preserve_acls,
&c->preserve_xattrs, &c->preserve_devices, &c->preserve_sparse};
&c->preserve_xattrs, &c->preserve_devices, &c->preserve_sparse,
&c->preserve_specials, &c->copy_devices, &c->write_devices};
for (size_t i = 0; i < sizeof(flags) / sizeof(flags[0]); i++) {
if (!receive_wire_bool(fd, flags[i]))
return false;