- 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.
- revert over-eager replacement of setfacl -m in test_features.py
- use --chunk-serialization (+ set dirs) in the two append/append-verify
chunk-serialization rejection unit tests so they exercise the real check
- rename archive-negation integration test (--no-preserve is inert under
archive because devices/specials force metadata)
- update stale (-c)/(-m)/(-s)/(-f) display labels and RSYNC_COMPAT -c/-m refs
- document the --no-perms negation limitation in the Wave A note
-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.
Capture+transmit source atime (pre-read stat; O_NOATIME sender guard) and birth
time (statx STATX_BTIME); receiver restores atime with mtime (crtime not settable
portably -> transmitted, explicitly not applied). --open-noatime is client-only.
-O/-J documented as accepted no-ops (FastSync never preserves dir/symlink times).
Wire: metadata frame gains atime/crtime val+sec+nsec; PROTOCOL_VERSION
2.11.0->2.12.0. Review fixes: gate atime capture to Linux (no epoch clobber on
non-Linux), close fd on fdopen failure, honest -O/-J status (Compat no-op).
Source files sharing (st_dev,st_ino) are recreated as hard links on the
destination; only the first member's data crosses the wire (siblings ride a
payload-less STATUS_HARDLINK frame). Ordering requires the single-FIFO-writer
receiver + forced sequential scan (documented). link()-failure falls back to a
byte-identical local copy. Rejects -s/--append. PROTOCOL_VERSION 2.11.0->2.12.0.
Review fixes: delete the dead HardLinkRegistry (ordering holds by FIFO writer),
and --existing no longer aborts when the first member is absent but the sibling
exists (leaves the sibling in place).
Receiver allocates the destination file's full size before streaming data
(posix_fallocate preferred, ftruncate fallback on EOPNOTSUPP/ENOSYS) so an
out-of-space transfer fails fast instead of partway. Additive config bool
crossing the wire; PROTOCOL_VERSION 2.10.0 -> 2.11.0. Threaded through all
store paths (atomic, inplace, partial/delay-updates staging, link-dest copy
fallback). Review hardening: explicit lseek(0) before the data write so
correctness does not depend on posix_fallocate leaving the fd offset unchanged.
Receiver-side ownership application, opt-in and privilege-gated:
- OFF for every existing transfer (plain -M/--preserve still never applies
ownership); only triggers on an explicit identity flag + receiver permission.
- EPERM/EACCES warn-and-continue (never aborts); other fchown errors escalate.
- fd-relative fchown after the file is written (symlink-safe, confined).
- New src/shared/identity.{c,h}; config fields numeric_ids / chown uid/gid /
usermap + groupmap id-pair tables cross the wire; PROTOCOL_VERSION 2.10.0
-> 2.11.0. CLI in client_cli.c; per-connection snapshot in server.c.
- Review fixes: EPERM/EACCES-only warn-and-continue, prominent root-receiver
notice, identity_clear_active on early server error paths, --numeric-ids
kept inert standalone (removed from activation trigger set).
- CLI: --append/--append-verify acceptance (parse + imply --incremental,
validate) and incompatibility rejection with -s and --whole-file; both
removed from the unimplemented reject list.
- Config: on-the-wire append/append_verify round-trip.
- Unit: append_resume_eligible / append_tail_length pure resume math.
- Integration (test_append.py): matching-prefix resume is byte-identical and
tail-only (wire bytes << source size); --append with a wrong prefix keeps
prefix+tail (rsync parity) while --append-verify detects the mismatch and
falls back to a byte-exact full transfer; --append with --inplace and -m.
Unit: CLI parse + imply relationships (delete-missing implies ignore, not
delete; valid with --delete and delete timing); delete_missing_args config wire
round-trip (ignore_missing_args confirmed client-only); three-section manifest
round-trip and third-section traversal rejection; manifest_delete_missing_args
exact-path semantics; commit-time parking. Existing two-section manifest frames
updated to the three-section format. Integration: default missing entry is a
hard pre-transfer error; --ignore-missing-args transfers the rest and succeeds
(all-missing transfers nothing; empty list still errors); --delete-missing-args
removes exactly the missing mirror and leaves unrelated extras unless --delete is
also present; filter-exclusion protection never blocks the explicit deletion;
--delete-before early timing composes; all parametrized single-threaded vs -m.
Unit (CLI): --fuzzy --no-incremental (either order) stays a valid plain-mode
config -- no forced handshake, no delta implication; --fuzzy --no-delta stays
covered.
Integration (TestFuzzy):
- worthless basis: a sibling that passes the name+size gates but shares no
blocks makes the sender reply STATUS_NEXT; the whole file is consumed inside
the delta handshake with byte-exact output (no protocol desync).
- non-displacement: an existing exact-path destination file INSIDE the delta
size bounds (same size, different content, older mtime) is used as the delta
basis instead of a byte-identical similar sibling (whole-file wire cost).
- asymmetric bases: basis larger than source (prefix reuse) and basis smaller
than source (appended tail as literals) both reconstruct byte-exactly with a
small delta.
- --no-fuzzy end-to-end equals the no-flag whole-file behavior.
CountingProxy closes its listener socket (fd hygiene).
Unit: walker all-or-nothing bounds (exceeded -> nothing removed + distinct
result; exact bound -> deletes), protected-prefix skipping, config wire
round-trip for force_delete/delete_excluded/prune_empty_dirs/max_delete, CLI
parse/validation for the new flags. Integration (TestDeletePolicy): default
delete-excluded protection and --delete-excluded opt-out (single-thread, -m,
early --delete-before, excluded-dir subtrees), --max-delete all-or-nothing over
and at the limit, --force file-over-nonempty-dir replacement, --prune-empty-dirs
(--dirs mode + recursion-mode parity), and --ignore-errors keeping deletion
active across a genuine scan I/O error (run as an unprivileged user).
Unit: parse -y/--fuzzy and --no-fuzzy negation (order-independent), -W and
--no-delta leave fuzzy inert, --fuzzy implies --incremental/--delta, and
validate_config rejects fuzzy with -s (chunk serialization) and -f
(sendfile). Config: fuzzy survives the socketpair wire round-trip.
Integration (TestFuzzy, byte counts via a new CountingProxy helper): the
rename case transfers a 2 MiB file in a few percent of its size with byte-
exact output under --fuzzy, while the no-fuzzy, no-candidate, dissimilar-
sibling and --whole-file runs send the whole file; -y alias; -m parity;
dest-holds-unsuitable-file falls back to the sibling; --delay-updates and
--remove-source-files keep their semantics on fuzzy transfers.
- CLI: each timing flag (+ --del alias) accepted and implies --delete;
conflicting timings and a timing with --no-delete are rejected.
- Config: delete_during/delete_delay survive config_send/config_receive;
two simultaneous timings are rejected by the receiver-side validation;
config_delete_timing_early() mapping is unit-tested.
- Integration (TCP, single- and multithreaded): every flag removes extras on
a successful transfer; early modes (--delete-before/--delete-during/--del)
delete before data is applied so a destination file blocking a nested
write is removed and the transfer succeeds, while plain --delete /
--delete-after / --delete-delay keep it and fail with every extra intact
(commit-style). Early timing also completes (without deleting) when the
server refuses deletion.
- parse_args accepts each flag in both forms, keeps repetition order/types,
implies --incremental + metadata, and rejects absolute/escaping/degenerate
paths; validate_config rejects basis dirs combined with -s.
- config wire round-trips a mixed basis list and rejects escaping/absolute
paths on the receiver side.
RSYNC_COMPAT Phase-2 row M: path-list construction and destination
directory creation while preserving traversal safety.
- -R/--relative with --files-from: transmit each listed entry under its
bare relative destination path (no source-root mirror). Files keep an
absolute local read path plus a separate wire/dest path (File.send_path);
manifest, incremental quick-check and change output follow the wire path,
so --delete and --remove-source-files stay consistent. -R without
--files-from is unchanged (full mirror).
- --no-implied-dirs: client-only, only meaningful with -R + --files-from.
A listed file whose parent dir is not itself (or via an ancestor)
explicitly listed cannot be placed; the run fails up front with a clear
error. No effect otherwise.
- --dirs/-d + --old-dirs/--old-d aliases: -d <dir> transmits the source
root as an explicit empty directory entry (STATUS_MKDIR frame); with
--files-from listed dirs are created empty and listed files transferred,
never descending. Works single-threaded, -m (sequential scanner in the
-m scan thread) and chunk-serialization (per-file type marker).
Directory entries appear in the delete manifest.
- --mkpath: new wire bool; server creates the destination root (and missing
leading components under its authorized root) at connection start. A
missing destination root is now rejected by default.
- Protocol bumped to 2.7.0 (mkpath wire field + STATUS_MKDIR + chunk type
marker). All receive paths funnel through file_save_to_disk_full which
creates directories via the secure confined mkdir engine; dir entries are
excluded from --remove-source-files outcome acknowledgements on both ends.
- Unit coverage: CLI parse (relative/dirs aliases/mkpath/no-implied-dirs),
config round-trip (relative + mkpath), scanner --dirs non-recursion and
-R send_path (sequential + parallel), receiver dir-entry save.
- Integration coverage: TestRelativeFilesFrom, TestNoImpliedDirs, TestDirs,
TestMkpath (single and -m).
- RSYNC_COMPAT: 4 rows move to Implemented (Summary 67/3/5/1/71 = 147).
Review fixes for --delay-updates:
- --delete no longer deletes the staged files: the delete walker gains a
skip_root_child parameter and receive_manifest passes DELAY_UPDATES_STAGING_DIR
when delay_updates is active, so deletion removes genuine extras while the
staging dir (a direct child of the receive root) is left for publication in
both single and -m modes.
- --backup-dir is rejected when it collides with the reserved internal staging
name .fastsync-stage (trailing slash normalized), in client validation and in
the received-config wire validation, preventing old backups from being
silently installed as new files.
- Staging dir is now held under an exclusive advisory flock for the whole
transfer (context lifetime): two simultaneous delayed transfers to one
destination root no longer share/destroy each other's staged data - the
second fails cleanly. Cleanup only touches the staging dir when this context
owns the lock, so a lock-contention failure cannot wipe a live session.
- Post-publish staging cleanup now returns/logs instead of discarding failures
(warning when the staging dir cannot be fully removed).
- Reworked the publish-failure integration test to exercise real mid-publish
semantics (top-level file published, nested rename fails, no rollback,
sources retained under --remove-source-files) and added integration tests for
--delete + --delay-updates ordering and reserved --backup-dir rejection.
- RSYNC_COMPAT note documents delete ordering, the reserved-name hazard, and
the concurrency guard.
Address an independent c-review of the files-from/filter feature:
- .rsync-filter precedence now matches rsync: evaluate the innermost
(current) directory's rules first, then ancestors, then the command-line
base (--filter/-C), so a deeper file's '+' can re-include what a shallower
'-' excluded (regression tests in both scan modes; single-thread and -m).
- --files-from: a listed entry missing on disk and an empty list are now hard
errors surfaced pre-transfer in send_files, send_files_multithreaded,
dry-run and --list-only; '.' (whole tree) and empty listed dirs stay valid.
- scanner_path_relative now handles a transfer root of / (previously the
scanner aborted on children of /).
- Reject unsupported rsync filter syntax explicitly (no silent no-ops):
+/- modifiers other than '/' (! C s r p x) and rules beginning with ':'/'.'
/'!' (merge/dir-merge/list-clear shorthands). Docs updated.
- -0/--from0 NUL mode preserves entry bytes (no CR/LF trimming); only newline
mode trims. Absolute-entry error message no longer includes the newline.
- --no-from0/--no-cvs-exclude registered as negatable booleans.
- RSYNC_COMPAT rows updated for the precedence, rejection list, NUL-mode
detail and the documented O(entries x files) scalability bound of the
allow-set (Summary unchanged: 62/3/5/1/76 = 147).
Implement the RSYNC_COMPAT Phase-2 filter/parser feature group:
- --files-from=FILE (repeatable) plus -0/--from0 NUL delimiters: parse the
source file list relative to the source root into a shared read-only
allow-set; the scanner transfers listed files and the whole subtree of
listed directories and prunes everything else in single- and
multithreaded mode. Absolute/'..' entries and missing files are hard
CLI errors.
- --filter=RULE: rsync-style +/- rules (anchored '/', dir-only trailing '/',
word include/exclude forms) evaluated first-match-wins with a default of
include, as an independent layer from legacy --exclude/--include.
Unsupported directives (merge/hide/... ) are rejected explicitly. -f stays
sendfile.
- -C/--cvs-exclude: well-known rsync CVS default exclude set.
- -F: per-directory .rsync-filter files read during traversal and applied to
the owning directory's subtree (single + parallel), never transferred.
- Delete manifest still derives from what was actually sent.
Client-only config fields; no wire/protocol change. Adds unit coverage
(CLI parse, allow-set and filter scanning single+parallel) and integration
tests (TestFilesFrom, TestFilters). RSYNC_COMPAT matrix rows updated:
5 rows move to Implemented (Summary 62/3/5/1/76 = 147).
Stage every successfully written file under a private 0700 .fastsync-stage
directory inside the receive root and atomically publish all staged files
only after the whole protocol stream (manifest/delete handling included)
has completed, immediately before the success/outcome frame. On any
abort/error before publication nothing is installed and staging is removed;
a publish failure aborts the transfer with best-effort cleanup of the
remainder (already-published files are not rolled back). Crash leftovers
are wiped when the next delayed transfer starts.
Wire: new delay_updates config flag (selection-options block), protocol
version bumped to 2.6.0, client/server validation rejects --inplace.
CLI/usage/validation updated. Works in single-threaded and -m modes
(exactly one write_thread stages files; the staged-file registry is
mutex-protected; publication runs once after both threads join).
--existing/--ignore-existing/--update decide against the final destination
at stage time; --backup is deferred to publication. remove_source_files
outcomes are only sent after publication so skipped/unpublished sources are
never deleted. Default (no flag) behavior is unchanged.
Tests: config wire round-trip, CLI parse, --inplace rejection, new
test_delay_updates unit suite (27 suites total), and integration
TestDelayUpdates covering single/-m parity, incremental reruns, remove
source files, receiver-skip ordering, and a deterministic publish-failure
abort path.
Receiver writes temps into a confined scratch dir and atomically renames
into place; EXDEV aborts; inplace/partial bypass; thread-safe temp names.
Uses existing wire field; no protocol bump. Reviewed (c-review APPROVE
WITH NITS, all fixed); PR #262.
Implement rsync-style itemized output backed by one shared change-event
engine (src/client/change_list.c):
- -i/--itemize-changes prints ">f+++++++++ <path>" for files actually sent
(single-threaded and -m); unchanged files print nothing.
- --list-only prints an ls-style listing of files that would be transferred
without contacting the server or writing anything.
- --out-format=FORMAT prints a printf-style template per changed file
(tokens %%f %%n %%l %%b %%M %%%%; unknown escapes preserved).
- --log-file-format=FMT logs each transferred file when --log-file is set.
Events are emitted from the per-file sender path shared by both transfer
modes, so the single sender thread is the only reporter (no races).
Capture the transfer root's device (st_dev) at scanner creation and skip
descending into any subdirectory on a different device (a mount point).
Implemented sender/client-side only: sequential BFS and parallel (-m) root
scan apply the same scanner_same_filesystem decision; no wire/protocol change
and default behavior is unchanged. Unit tests cover the pure decision, same
device scanning in both modes, and CLI parsing; integration tests prove -x
leaves a single-filesystem tree byte-identical and, when root can mount a
tmpfs, skips a genuine cross-device subtree.
- Correct misleading doc comments on set_string_option /
set_positive_int_option / set_nonneg_int_option (they return 0/-1,
not true/false).
- find_table_option_with_equals() now matches every OPTION_TABLE value
option (OPT_STRING/OPT_POS_INT/OPT_NONNEG_INT/OPT_ULL), so forms such
as --max-size=2G, --min-size=1K, --suffix=.bak, --timeout=30,
--max-depth=5, --backup-dir=X parse instead of dying as 'Unknown option'.
--max-size/--min-size now accept rsync-style binary suffixes (0 remains a
valid 'no limit' byte count). Existing special handling for
--compress-choice, --compress-level, --modify-window=, --chmod=,
--skip-compress=, --compress-threads= is preserved.
- Options that require a separate value (-p, --exclude, --include,
--delta-block, --delta-max, --server-port, --bwlimit, --chunk-size,
--log-file, --exclude-from, --include-from, -T, --skip-compress,
--compress-threads) now emit an explicit 'missing argument' diagnostic
instead of falling through to the generic 'Unknown option' branch when
given as the final argv entry.
- Add unit tests covering the = forms (--max-size=2G, --min-size=1K,
--suffix=.bak, --timeout=30, --max-depth=5, --backup-dir=X) and a clean
'missing argument' (not 'Unknown option') diagnostic for trailing
--exclude/--server-port/--skip-compress/-T.
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