- Wire: config frame gains report_deletes (protocol 2.26.0 -> 2.27.0); the
receiver lists actually-removed paths in the STATUS_STATS path list, so the
sender prints rsync's `deleting PATH` / `*deleting PATH` lines for a real
--delete run (and -i/out-format). Observers threaded through the manifest,
missing-args and per-directory delete engines; golden wire len/hash updated.
- bwlimit: throttle now paces like rsync 3.4.1 -- ~100ms burst capacity and the
sleep is no longer credited as refill, so 4 MiB at 1024/2048 KiB/s matches
rsync within ~4% (was ~2x too fast).
- --bwlimit: faithful port of rsync 3.4.1 parse_size_arg (default KiB/s,
binary K/M/G/T/P, decimal KB/MB, KiB/MiB, decimals, 0 = unlimited, 512-byte
floor, (size+512)/1024 quantization). Unit tests + docs.
- --info: wire del/remove/name/flist/nonreg/progress to real FastSync events in
rsync's line format (deleting PATH, sender removed NAME, name lines,
'sending incremental file list', skipping non-regular file "NAME"); name no
longer aliases copy; --info=progress drives the progress path and report_stats.
- --ignore-errors: match rsync's default -- a source I/O error skips deletion
unless --ignore-errors, while the readable tree still transfers and the run
exits 23. Covers all delete timings and both send paths.
Accept the full rsync 3.4.1 --info (backup, del, flist, mount, nonreg,
progress, remove, symsafe) and --debug (acl, backup, bind, chdir, connect,
cmd, del, deltasum, dup, exit, filter, flist, fuzzy, genr, hash, hlink,
iconv, nstr, own, recv, send, time) vocabularies, plus the historical
syms/hl/owner aliases, with level suffixes. Categories FastSync already
emits (copy/name/misc/skip/stats and io/proto/pack/util) still set their
log flags; the rest are accepted but silent. Unknown names remain
rejected by name, matching rsync. Update the CLI unit tests and the
rsync-parity integration tests (previously they required del/filter to be
rejected).
Accept the full rsync 3.4.1 --compress-choice set (zstd/lz4/zlib/zlibx/
none/auto) and the two-name --checksum-choice TRANSFER,PRE-TRANSFER form,
including rsync's 'none' rules (rejected with --checksum at exit 4, and
forcing --whole-file as the transfer half) and unknown names at exit 4.
The checksum default becomes the auto-negotiated xxh128.
Negotiation is deterministic and symmetric: both peers run the same
preference resolver (rsync's --version order). The resolved
compression_algo crosses the wire as a new trailing config-frame int so
the receiver validates and installs the exact codec; an unsupported
choice is refused before STATUS_OK like rsync's failed negotiation.
Bump PROTOCOL_VERSION to 2.26.0.
Add the STATUS_STATS end-of-transfer receiver report (matched/deleted
counters plus a would-delete path list) behind the report_stats wire
bool, and a read-only delete_extras_list walker. --stats now renders
true wire byte totals and the receiver-reported deleted count; a
server-contacting -n --delete prints transfer-relative '*deleting' lines
matching rsync's itemize layout.
- --chmod no longer implies --preserve-perms; repeated --chmod options
accumulate, and D/F/X selectors plus s/t special bits are supported with
rsync's exact parse_chmod/tweak_mode semantics.
- Stop masking group/other write and setuid/setgid/sticky: -p copies the
source mode exactly, no-p new entries use source&~umask, directories keep
setgid/sticky, and special nodes follow the same rules.
- Apply ownership before mode on the fd path so a chown cannot clear the
setuid/setgid bits -p just restored (rsync order).
- Update unit and integration tests, including differential checks against
rsync 3.4.1.
Address review findings on feat/rsync-parity:
- confine --temp-dir below the receive root (reject absolute/.. like
backup-dir/partial-dir); keep EXDEV non-atomic fallback
- floor server session I/O deadlines at SERVER_IO_TIMEOUT_SEC (60s) and
install it on the socket layer at startup (slow-loris)
- charge each --delete-missing-args directory removal once and clamp the
extras-walk remaining budget so it can never underflow past --max-delete
- normalize --compress-choice=auto to zstd client-side and accept it on
receive so auto transfers no longer fail
- map received --max-alloc=0 to MAX_SERVER_ALLOC (receive path only)
- zero File.dest_state; include log-file-format in report_dest_info;
add STATUS_DELETE_LIMIT name; recognize --skip-compress as a
separate-value option; OOM-guard send_list_only root entry; drop the
dead -M= branch; record the bare relative protected prefix for -R
size-prunes in both scanners; refresh delete-manifest comment
- pin the rsync tarball sha256 and bump integrator image to v11
Tests: temp-dir rejection/relative/cross-device, server timeout floor,
delete-missing dir budget regression, compress-choice=auto e2e,
max-alloc=0 receive mapping, dest_state, report_dest_info modes,
skip-compress dash value, -M short forms, -R root size-prune mirror
protection (rsync 3.4.1 confirmed).
- Scope the --delete extras walk to directories synchronized by the
transfer: add a synchronized-directory section to the delete manifest
(protocol 2.23.0) so --files-from subsets no longer delete untransmitted
paths outside listed directory subtrees (data-loss fix).
- Separate --max-size/--min-size prune protection from --delete-excluded so
size-pruned source mirrors survive (rsync parity).
- Unlink extraneous destination symlinks instead of skipping them.
- Make --max-delete partial (delete up to N, skip the rest) and exit 25;
accept negative values as unlimited.
- Draw --delete-missing-args deletions from the shared --max-delete budget.
- Honor --force during --delay-updates publication.
Add unit and integration regression tests; update the pinned config wire
golden and version strings for the 2.23.0 manifest/status additions.
#289 checksum/compression:
- -c/--checksum now implies the incremental content quick-check (without
implying -t), so an unchanged file is skipped like rsync.
- --checksum-choice/--cc accepts xxh64/xxhash, xxh3, xxh128, md5 and auto;
md4/sha1/none and the two-name form are rejected by name.
- --compress-choice/--zc rejects lz4/zlib/zlibx by name (zstd/none/auto kept).
- --checksum-seed=0 is randomized per transfer and sent on the wire.
- --skip-compress uses rsync 3.4.1's default suffix list; slash separators and
dot-less suffixes are accepted.
- add --no-whole-file.
#295 timeouts/alloc/temp-dir:
- --timeout default 0 (disabled), --contimeout default 60; 0 disables both,
plus --no-timeout/--no-contimeout.
- --max-alloc=0 means no allocation limit (was rejected).
- --temp-dir accepts any dir, requires it to exist, and falls back to a
non-atomic copy on EXDEV instead of aborting.
#296 connectivity/daemon:
- -M/--remote-option is rejected for daemon/TCP destinations (SSH-only).
- --trust-sender clarified as receiver-local; server-path tests added.
- --stop-at accepts rsync's full date form (y-m-dTh:m etc.).
Adds unit and integration coverage; no wire-field change, PROTOCOL_VERSION stays
2.22.0.
- #286: --numeric-ids is a mapping modifier only; it no longer activates
chown by itself (identity_active_enabled/owner/group predicates), and
--fake-super stores the resolved mapping instead of real-chowning.
- #286: apply owner/group to directories via the deferred directory
metadata path; capture+transmit+apply directory xattrs/ACLs (-aX/-aA),
including default ACLs, in STATUS_MKDIR/STATUS_DIR_TIMES.
- #294: --usermap/--groupmap support inclusive ranges, '*', empty FROM
(unnamed ids), and receiver-side TO name resolution; --chown mixing with
a same-side map is rejected like rsync.
- Protocol 2.22.0 -> 2.23.0 (map wire entry gains from_hi + to_name;
dir frames gain a bounded xattr block).
#291:
- Compile --exclude/--include/--exclude-from/--include-from into the SAME
ordered rule list as --filter/-f (first match wins), so the common
`--include='*.txt' --exclude='*'` idiom and include-alone semantics match
rsync. The legacy per-kind scanner arrays are no longer applied.
- -x/--one-file-system emits the cross-device mount-point directory entry
(empty) instead of dropping it, in both the sequential and parallel scanners.
- Stop passing the legacy arrays to the scanner; document -f is --filter.
#292:
- New src/shared/format.c/.h: rsync "big_num" (comma-grouped integers) and
decimal -h human sizes, %M/%t timestamp, and the STATUS_DEST_INFO codec.
- Receiver answers each STATUS_CHECK with a pre-transfer destination snapshot
(new report_dest_info wire field + STATUS_DEST_INFO, PROTOCOL_VERSION
2.23.0) so the sender can render true itemize columns.
- Itemize now emits rsync-correct update/type chars and c/s/t/p/o/g columns
for files, dirs, symlinks and hard links, comparing size/time/perms/owner/
group against the reported destination.
- --out-format gains %i %n %f %l %b %M %t %o %p %B %U %G %L; %f is the
relative display path, %M the YYYY/MM/DD-HH:MM:SS form, %b the literal
bytes sent.
- --list-only prints transfer-relative names, directory entries and ls-style
grouped sizes.
- --stats prints rsync's multi-line block on stdout; -h uses decimal units.
Tests: unit tests for the filter ordering, format primitives, itemize
columns; integration + differential tests against real rsync 3.4.1 for
itemize/out-format/list-only/selection and -x. Golden wire len/hash and
protocol version strings updated for 2.23.0.
Implement rsync 3.4.1 client-CLI parity:
- cluster boolean shorts (-av, -aAX, -rlpt) and accept attached values
(-B1048576, -essh, -Mfoo); add the -r, -b, -L and -B short aliases
(-r is a faithful no-op since FastSync is always recursive)
- stop OPT_NOOP (-s/--secluded-args, -r/--recursive) from swallowing the
next argv
- add inline --opt=value for every value-taking long option, including
--exclude/--include/--exclude-from/--include-from/--log-file (#291)
- accept --port on the server CLI in addition to -p (#296)
- reject unknown flags naming the flag and stating it is unsupported
Unit tests cover clustering, attached/inline values, the OPT_NOOP
argument-consumption fix and rejected shorts.
Split FastSync's single use_metadata bundle into four independent rsync-parity attributes: preserve_perms, preserve_times, preserve_owner, preserve_group. use_metadata is now a derived transport bit (config_derived_use_metadata).
CLI: real -p/--perms, -t/--times, -o/--owner, -g/--group plus --no-perms/--no-times/--no-owner/--no-group (short and long) and --no-preserve; -a is now rsync -rlptgoD; --preserve = -pt; -A implies -p; -X does not; --chmod implies -p; --usermap/--groupmap/--chown imply owner/group per side; --incremental/--delta still auto-preserve unless negated.
Receiver: per-attribute FileAttrPolicy gating for files, dirs (modes applied at end of transfer), symlinks and specials; rsync -E read-bit rule; new files get source_mode & ~umask sanitized (no group/other write); per-side identity resolution; deferred directory metadata; batch dir-metadata replay; daemon modules without 'client owner = yes' no longer refuse plain -a but force super off (no ownership) with a warning.
Wire: PROTOCOL_VERSION 2.21.0 -> 2.22.0 (four appended config bools, golden 653 / 95530566005420798). FileMetadata/chunk/batch framing unchanged. Docs/CHANGELOG/CMake updated to 2.22.0.
Bring README.md and RSYNC_COMPAT.md in line with the actual code/CLI and add
an automated guard so they cannot silently drift again.
Waves A-E:
- Correct stale compatibility claims: archive is `-rlptD` (owner/group are
opt-in via identity flags, not implied), and symlinks, hard links, xattrs,
ACLs and `--dirs` are implemented.
- Remove documented-but-nonexistent features: the six unread FASTSYNC_* env
vars, and `--client-cn` (server-only) from the client table.
- Repair the corrupted "Implementation Details" section (broken list numbering
and emphasis) and correct it against the source.
- Sync the client and server option tables with usage.c / server_cli.c, and
document server-contacting `--dry-run` (protocol 2.21.0).
- Hygiene: `# FastSync` heading, real build commands, consistent binary names,
runnable TLS examples, daemon module keys.
Also align the client `--help` / archive log wording and the RSYNC_COMPAT
archive rows with the opt-in ownership model, and add
tests/integration/test_readme_consistency.py (marked `ci`) asserting every
documented FASTSYNC_* var is read in src/ and every documented client/server
flag appears in the corresponding `--help`.
- client_cli: capture errno before output_escape() in
read_patterns_from_file() so an over-long line is still reported as
EFBIG instead of the (possibly malloc-clobbered) errno.
- file_list: guard string_list_add() capacity doubling against
overflow (capacity > INT_MAX / 2), matching filter_rule_list_add();
callers already surface the false as a memory-allocation error.
- compression: ZSTD_isError() is true for ZSTD_CONTENTSIZE_UNKNOWN,
which made the 3x unknown-size fallback dead code. Test the
CONTENTSIZE_ERROR/UNKNOWN sentinels explicitly so unknown-size frames
reach the estimate path (still bounded by the existing hard limit)
while invalid frames are rejected. Known-size frames and the 100 MB
ceiling/overflow checks are unchanged.
- tests: add an unknown-content-size-frame decompression test.
Tests: ./build/tests and ./build-asan/tests all pass (42/42);
clang-format + cppcheck clean.
- parse_ull_arg() rejects a leading '-'/'+' (strtoull would silently wrap
-1 to ULLONG_MAX) and --chunk-size/--delta-max enforce their upper bounds.
- Escape local untrusted paths before logging (client_send, scanner,
--filter rule, pattern-file reads) with output_escape(..., 8-bit mode).
- Read --exclude-from/--include-from through the bounded line reader.
- Open --log-file with O_NOFOLLOW|O_CLOEXEC, mode 0600, via open+fdopen;
create --write-batch with O_NOFOLLOW|O_CLOEXEC, mode 0600.
- Reject --dry-run together with --write-batch (dry-run must not write the
batch file), alongside the existing --read-batch/--only-write-batch rules.
Tests: signed/oversized numeric rejection, over-long pattern file, dry-run +
write-batch unit and integration coverage.
--dry-run --server-host=H (or TLS / source-bind --address) silently ran the
client-side manifest even though a real run contacts the server. Add a
client-only, never-serialized server_host_set bit (alongside the existing
server_port_set) and extend dry_run_targets_server so every explicit remote
target contacts the receiver.
Also make incremental_check return the dry-run code (4) only when the
session actually requested dry-run; a stray STATUS_DRY_RUN_TRANSFER from a
hostile/buggy peer is now a logged protocol error (STATUS_ERROR) instead of
falling through to send file data and desync. Both normal send_single_file
callers handle rc == 4 explicitly as an abort.
--dry-run now handshakes with a remote/daemon receiver and reports what
WOULD transfer/skip based on receiver state, mutating nothing on either
side.
- Serialize Config.dry_run into the wire config frame and append
STATUS_DRY_RUN_TRANSFER to the status enum (no renumbering); bump
PROTOCOL_VERSION/CMake VERSION/CHANGELOG/golden wire to 2.21.0.
- Receiver: receive_incremental_check_ex runs the normal read-only
decision and answers STATUS_OK (skip) or STATUS_DRY_RUN_TRANSFER
(would transfer) with no basis materialization/append/delta/full
transfer. All mutation sites are guarded by !dry_run: file store,
manifest deletes, --mkpath root creation, --delay-updates staging,
publication, directory-time application, and outcome acks.
- Client: send_dry_run_remote connects, sends the config, checks each
regular file and prints the would-transfer set + trailer; no file data
or delete manifest is sent. Plain local destinations keep the
client-side manifest.
Address low-severity review findings on the X-macro config refactor:
1. The golden test only hashed config_send_wire_block(), so a
receive-side KIND that reads a different width/order could still
round-trip symmetrically. Add test_config_wire_golden_receive():
capture the same hash-pinned 633-byte frame and feed it through
config_receive(), asserting every field (config_wire_equal) plus the
derived use_delta/use_xattrs bits and representative bounded kinds.
Add test_config_wire_receive_bounds() for bounds the symmetric
round-trip cannot reach: an out-of-range BOOL (hand-built frame),
RAW_MAXALLOC zero, a malformed STR_MODULE, an over-cap
INT_IDMAPCOUNT, and an out-of-range INT_IDENTITY chown_uid.
2. golden_config_populate() set long runs of booleans to all-1, so an
adjacent swap within a run produced identical bytes. Alternate the
boolean values and make the fixture receiver-valid (chmod grammar
"u=rwx,go=rx" is the same 11 bytes; delta_max_file_size inside the
bound). Re-pin the golden: len stays 633, hash is now
9160991280011164139 (computed, not guessed).
3. Document in config.h and client_cli.c that the CLI option tables
remain hand-maintained and are deliberately not generated from the
wire-field X-macro (client-only fields, flag/alias/negation
semantics). No CLI-table rewrite.
PROTOCOL_VERSION stays "2.20.0"; src/shared/config.c is untouched and
the wire bytes are unchanged apart from the fixture's own new values.
Break the ~700-line parse_args god function into cohesive static helpers
grouped by concern: output controls, pre-negation, range/time options, the
OPTION_TABLE dispatcher, flag/meta handlers, IO/network options, filter and
logging options, checksum/socket options, remote/basis/identity options,
positional handling, and a final lowering step.
A file-local CliParseCtx carries the config, cursor, positional buffers and
the mutable parse flags, so each handler stays focused. The dispatcher calls
the handlers in the original recognition order and preserves the exact
return contract (0/1/negative), error messages, log levels and control flow.
Behavior preserved; no functional changes.
- server_cli: handle --password-file/--early-input/--iconv via arg_has_value
in one place, removing the unreachable duplicate separate-form arms while
keeping both --opt VALUE and --opt=VALUE working
- client_cli: factor the triplicated --delta-block/--block-size range check
into set_delta_block_size(); drop the redundant use_metadata assignment
after identity_parse_copy_as (the parser already forces it)
- tests: cover both spellings of --iconv/--delta-block, make the archive
short-form test actually call parse_args, add delta-block invalid cases
Add the receiver-side --super / --no-super tri-state (Config->super_mode)
under the safe-subset + clear-refusal privilege model: FastSync never
elevates privileges, it only permits super-user attempts that are already
confined fd-relative below the authorized receive root.
- identity: privilege_super_permitted() gate (OFF=false, ON=true, AUTO follows
geteuid()==0); identity_apply_ownership/_link become no-ops when not
permitted; --super with no explicit identity policy implies raw numeric-id
preservation (explicit usermap/groupmap/chown/numeric-ids still win); warn
exactly once when --super is requested by a non-root receiver.
- file_receive: gate char/block device-node creation on the gate; FIFO/socket
handling is unchanged.
- wire: trailing super_mode int after the --iconv spec, validated 0..2 in
receive_privilege_options and validate_received_config; PROTOCOL_VERSION
2.17.0 -> 2.18.0; version-sensitive tests and docs updated.
- CLI: --super/--no-super parsed explicitly before the generic --no-* branch
(malformed --super=x rejected); usage text added.
- tests: config wire round-trip + invalid-value rejection, privilege-gate mode
unit test, CLI parse test, integration transfer + root-gated ownership
suppression/appliance tests.
- docs: RSYNC_COMPAT --super row + Wave E note, protocol mentions, README.
Force the receiver to apply the requested owner/group to every written
entry through the confined fd-relative identity path instead of switching
the process credentials (unsafe for the multithreaded receiver). An
unprivileged receiver refuses the transfer up front in server_module_gate,
before STATUS_OK, so no data is written with the wrong ownership.
- new Config fields copy_as_set/copy_as_uid/copy_as_gid + defaults
- identity_parse_copy_as (name/@N/* resolution, primary-gid default,
gid==uid fallback for numeric ids with no passwd entry); implies -M
- identity snapshot + highest-priority forcing in identity_resolve_targets
- identity_copy_as_refused() helper
- trailing config-frame block (presence int + two int32 ids, >=0 checked)
- PROTOCOL_VERSION 2.17.0 -> 2.18.0; version-sensitive tests updated
- unit tests for parse + wire round-trip/negative-id rejection
- integration TestCopyAs: unprivileged refusal + root chown assertion
- RSYNC_COMPAT.md --copy-as row updated (safe subset + divergence); README
protocol version refreshed
- fake_super_restore_fd now sanitizes mode like metadata_mode (never grants
S_IWGRP|S_IWOTH; 0666 -> 0644), fixing a privilege regression
- --sparse takes precedence over --preallocate (skip posix_fallocate when
sparse) so holes are not re-allocated; docs corrected
- --partial retention disabled under --no_replace (ignore/existing) and only
marks write_attempted after the write begins (no empty-temp retention)
- accept --block-size=SIZE / --delta-block=SIZE inline forms; neutral messages
- fake-super EPERM/EACCES skipped silently (docs aligned); EINVAL still logged
- sparse unit test now memcmp's the full buffer; TestBlockSize integration keeps
the destination basis so delta is genuinely exercised
- unit 37/37, cppcheck 0, clang-format 0
- write_all_sparse: skips all-zero runs >= 4096 bytes via lseek(SEEK_CUR) and
ftruncates the final size, wired into the atomic temp+rename and --inplace
paths with no wire change (full image already in memory).
- --partial retention: on a save failure after the temp held data, rename the
already-written temp to the destination path (best-effort; falls through to
unlink; never retains when --partial is off) so --append/--append-verify can
resume; tested by forcing futimens EINVAL with an out-of-range nsec.
- --block-size aliases --delta-block; verified config->delta_block_size is
honored by the delta engine end-to-end (unit + integration tests).
- fake_super_restore_fd: parses and re-applies user.fastsync.stat fd-relative
(fchown best-effort/non-root skipped, fchmod, futimens); a save under
--fake-super now both records and re-applies.
- -N/--crtimes and --stderr=client promoted to a new 'Impossible/Divergence'
status bucket (Summary: 136/2/4/3/2 = 147).
- cppcheck/clang-format clean; unit 37/37; integration 407 passed.
-c -> --checksum, -m -> --prune-empty-dirs, -M -> --remote-option,
-f -> --filter, -s -> --secluded-args, -p -> --perms, -T -> --temp-dir;
-a/--archive is now real rsync -rlptgoD (links+metadata+devices+specials).
FastSync's own flags moved to long-form-only or new shorts:
-j/--threads (multithreading), --preserve (metadata), --sendfile,
--chunk-serialization, --timeout, --ssh-port. Client-side only; the
wire config fields are unchanged (no PROTOCOL_VERSION bump). The server
keeps -p as its port. Docs (README, RSYNC_COMPAT summary 129->132) and
unit/integration tests updated. 37/37 unit, 400-pass integration.
Implements the client-only residual-batch feature end-to-end:
- src/shared/batch.{c,h}: self-contained single-file batch codec using the
existing chunk_serialize/chunk_deserialize codec (byte-identical by
construction). Magic+format-version header (metadata mode is persisted into
the header so a batch is self-describing across machines), length-prefixed
chunk records, bounded reads that reject malformed/truncated/oversized
records cleanly.
- src/client/client_send.c: write_batch_from_source (deterministic separate
scan pass, loads every chunk's file images, emits header+records) and
apply_batch_to_dest (local apply to a destination root via
file_save_to_disk_full). No wire change, no server involved.
- src/client/client_validation.c: --write-batch XOR --only-write-batch;
--read-batch exclusive with both; --read-batch needs only a DEST,
--only-write-batch only a SOURCE.
- src/client/client_cli.c: main() drives the three batch modes without
connecting/transferring for read/only-write; --write-batch runs the live
transfer (single-threaded so the config survives) then emits the batch.
- tests/test_batch.{c,h} (unit: byte-identical roundtrip with and without
metadata; bad-magic/truncated/oversized rejection) + tests/integration/
test_batch.py (only-write no-server, read-batch no-source roundtrip,
--write-batch with a live transfer, conflict rejections).
- clang-format: realign PART-1 config.h comment block.
No PROTOCOL_VERSION bump, no config-frame field, no server flag.
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