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2019-12-05is_ntfs_dotgit(): speed it upLibravatar Johannes Schindelin1-25/+30
Previously, this function was written without focusing on speed, intending to make reviewing the code as easy as possible, to avoid any bugs in this critical code. Turns out: we can do much better on both accounts. With this patch, we make it as fast as this developer can make it go: - We avoid the call to `is_dir_sep()` and make all the character comparisons explicit. - We avoid the cost of calling `strncasecmp()` and unroll the test for `.git` and `git~1`, not even using `tolower()` because it is faster to compare against two constant values. - We look for `.git` and `.git~1` first thing, and return early if not found. - We also avoid calling a separate function for detecting chains of spaces and periods. Each of these improvements has a noticeable impact on the speed of `is_ntfs_dotgit()`. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05path: also guard `.gitmodules` against NTFS Alternate Data StreamsLibravatar Johannes Schindelin1-1/+1
We just safe-guarded `.git` against NTFS Alternate Data Stream-related attack vectors, and now it is time to do the same for `.gitmodules`. Note: In the added regression test, we refrain from verifying all kinds of variations between short names and NTFS Alternate Data Streams: as the new code disallows _all_ Alternate Data Streams of `.gitmodules`, it is enough to test one in order to know that all of them are guarded against. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05path: safeguard `.git` against NTFS Alternate Streams AccessesLibravatar Johannes Schindelin1-1/+11
Probably inspired by HFS' resource streams, NTFS supports "Alternate Data Streams": by appending `:<stream-name>` to the file name, information in addition to the file contents can be written and read, information that is copied together with the file (unless copied to a non-NTFS location). These Alternate Data Streams are typically used for things like marking an executable as having just been downloaded from the internet (and hence not necessarily being trustworthy). In addition to a stream name, a stream type can be appended, like so: `:<stream-name>:<stream-type>`. Unless specified, the default stream type is `$DATA` for files and `$INDEX_ALLOCATION` for directories. In other words, `.git::$INDEX_ALLOCATION` is a valid way to reference the `.git` directory! In our work in Git v2.2.1 to protect Git on NTFS drives under `core.protectNTFS`, we focused exclusively on NTFS short names, unaware of the fact that NTFS Alternate Data Streams offer a similar attack vector. Let's fix this. Seeing as it is better to be safe than sorry, we simply disallow paths referring to *any* NTFS Alternate Data Stream of `.git`, not just `::$INDEX_ALLOCATION`. This also simplifies the implementation. This closes CVE-2019-1352. Further reading about NTFS Alternate Data Streams: https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-fscc/c54dec26-1551-4d3a-a0ea-4fa40f848eb3 Reported-by: Nicolas Joly <Nicolas.Joly@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-05is_ntfs_dotgit(): only verify the leading segmentLibravatar Johannes Schindelin1-4/+1
The config setting `core.protectNTFS` is specifically designed to work not only on Windows, but anywhere, to allow for repositories hosted on, say, Linux servers to be protected against NTFS-specific attack vectors. As a consequence, `is_ntfs_dotgit()` manually splits backslash-separated paths (but does not do the same for paths separated by forward slashes), under the assumption that the backslash might not be a valid directory separator on the _current_ Operating System. However, the two callers, `verify_path()` and `fsck_tree()`, are supposed to feed only individual path segments to the `is_ntfs_dotgit()` function. This causes a lot of duplicate scanning (and very inefficient scanning, too, as the inner loop of `is_ntfs_dotgit()` was optimized for readability rather than for speed. Let's simplify the design of `is_ntfs_dotgit()` by putting the burden of splitting the paths by backslashes as directory separators on the callers of said function. Consequently, the `verify_path()` function, which already splits the path by directory separators, now treats backslashes as directory separators _explicitly_ when `core.protectNTFS` is turned on, even on platforms where the backslash is _not_ a directory separator. Note that we have to repeat some code in `verify_path()`: if the backslash is not a directory separator on the current Operating System, we want to allow file names like `\`, but we _do_ want to disallow paths that are clearly intended to cause harm when the repository is cloned on Windows. The `fsck_tree()` function (the other caller of `is_ntfs_dotgit()`) now needs to look for backslashes in tree entries' names specifically when `core.protectNTFS` is turned on. While it would be tempting to completely disallow backslashes in that case (much like `fsck` reports names containing forward slashes as "full paths"), this would be overzealous: when `core.protectNTFS` is turned on in a non-Windows setup, backslashes are perfectly valid characters in file names while we _still_ want to disallow tree entries that are clearly designed to exploit NTFS-specific behavior. This simplification will make subsequent changes easier to implement, such as turning `core.protectNTFS` on by default (not only on Windows) or protecting against attack vectors involving NTFS Alternate Data Streams. Incidentally, this change allows for catching malicious repositories that contain tree entries of the form `dir\.gitmodules` already on the server side rather than only on the client side (and previously only on Windows): in contrast to `is_ntfs_dotgit()`, the `is_ntfs_dotgitmodules()` function already expects the caller to split the paths by directory separators. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2019-12-04path.c: document the purpose of `is_ntfs_dotgit()`Libravatar Johannes Schindelin1-0/+28
Previously, this function was completely undocumented. It is worth, though, to explain what is going on, as it is not really obvious at all. Suggested-by: Garima Singh <garima.singh@microsoft.com> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
2018-05-22Sync with Git 2.13.7Libravatar Junio C Hamano1-1/+85
* maint-2.13: Git 2.13.7 verify_path: disallow symlinks in .gitmodules update-index: stat updated files earlier verify_dotfile: mention case-insensitivity in comment verify_path: drop clever fallthrough skip_prefix: add case-insensitive variant is_{hfs,ntfs}_dotgitmodules: add tests is_ntfs_dotgit: match other .git files is_hfs_dotgit: match other .git files is_ntfs_dotgit: use a size_t for traversing string submodule-config: verify submodule names as paths
2018-05-21is_ntfs_dotgit: match other .git filesLibravatar Johannes Schindelin1-0/+84
When we started to catch NTFS short names that clash with .git, we only looked for GIT~1. This is sufficient because we only ever clone into an empty directory, so .git is guaranteed to be the first subdirectory or file in that directory. However, even with a fresh clone, .gitmodules is *not* necessarily the first file to be written that would want the NTFS short name GITMOD~1: a malicious repository can add .gitmodul0000 and friends, which sorts before `.gitmodules` and is therefore checked out *first*. For that reason, we have to test not only for ~1 short names, but for others, too. It's hard to just adapt the existing checks in is_ntfs_dotgit(): since Windows 2000 (i.e., in all Windows versions still supported by Git), NTFS short names are only generated in the <prefix>~<number> form up to number 4. After that, a *different* prefix is used, calculated from the long file name using an undocumented, but stable algorithm. For example, the short name of .gitmodules would be GITMOD~1, but if it is taken, and all of ~2, ~3 and ~4 are taken, too, the short name GI7EBA~1 will be used. From there, collisions are handled by incrementing the number, shortening the prefix as needed (until ~9999999 is reached, in which case NTFS will not allow the file to be created). We'd also want to handle .gitignore and .gitattributes, which suffer from a similar problem, using the fall-back short names GI250A~1 and GI7D29~1, respectively. To accommodate for that, we could reimplement the hashing algorithm, but it is just safer and simpler to provide the known prefixes. This algorithm has been reverse-engineered and described at https://usn.pw/blog/gen/2015/06/09/filenames/, which is defunct but still available via https://web.archive.org/. These can be recomputed by running the following Perl script: -- snip -- use warnings; use strict; sub compute_short_name_hash ($) { my $checksum = 0; foreach (split('', $_[0])) { $checksum = ($checksum * 0x25 + ord($_)) & 0xffff; } $checksum = ($checksum * 314159269) & 0xffffffff; $checksum = 1 + (~$checksum & 0x7fffffff) if ($checksum & 0x80000000); $checksum -= (($checksum * 1152921497) >> 60) * 1000000007; return scalar reverse sprintf("%x", $checksum & 0xffff); } print compute_short_name_hash($ARGV[0]); -- snap -- E.g., running that with the argument ".gitignore" will result in "250a" (which then becomes "gi250a" in the code). Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Jeff King <peff@peff.net>
2018-05-21is_ntfs_dotgit: use a size_t for traversing stringLibravatar Jeff King1-1/+1
We walk through the "name" string using an int, which can wrap to a negative value and cause us to read random memory before our array (e.g., by creating a tree with a name >2GB, since "int" is still 32 bits even on most 64-bit platforms). Worse, this is easy to trigger during the fsck_tree() check, which is supposed to be protecting us from malicious garbage. Note one bit of trickiness in the existing code: we sometimes assign -1 to "len" at the end of the loop, and then rely on the "len++" in the for-loop's increment to take it back to 0. This is still legal with a size_t, since assigning -1 will turn into SIZE_MAX, which then wraps around to 0 on increment. Signed-off-by: Jeff King <peff@peff.net>
2017-10-18Merge branch 'jk/validate-headref-fix' into maintLibravatar Junio C Hamano1-11/+12
Code clean-up. * jk/validate-headref-fix: validate_headref: use get_oid_hex for detached HEADs validate_headref: use skip_prefix for symref parsing validate_headref: NUL-terminate HEAD buffer
2017-10-04path.c: fix uninitialized memory accessLibravatar Jeff King1-5/+4
In cleanup_path we're passing in a char array, run a memcmp on it, and run through it without ever checking if something is in the array in the first place. This can lead us to access uninitialized memory, for example in t5541-http-push-smart.sh test 7, when run under valgrind: ==4423== Conditional jump or move depends on uninitialised value(s) ==4423== at 0x242FA9: cleanup_path (path.c:35) ==4423== by 0x242FA9: mkpath (path.c:456) ==4423== by 0x256CC7: refname_match (refs.c:364) ==4423== by 0x26C181: count_refspec_match (remote.c:1015) ==4423== by 0x26C181: match_explicit_lhs (remote.c:1126) ==4423== by 0x26C181: check_push_refs (remote.c:1409) ==4423== by 0x2ABB4D: transport_push (transport.c:870) ==4423== by 0x186703: push_with_options (push.c:332) ==4423== by 0x18746D: do_push (push.c:409) ==4423== by 0x18746D: cmd_push (push.c:566) ==4423== by 0x1183E0: run_builtin (git.c:352) ==4423== by 0x11973E: handle_builtin (git.c:539) ==4423== by 0x11973E: run_argv (git.c:593) ==4423== by 0x11973E: main (git.c:698) ==4423== Uninitialised value was created by a heap allocation ==4423== at 0x4C2CD8F: malloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==4423== by 0x4C2F195: realloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==4423== by 0x2C196B: xrealloc (wrapper.c:137) ==4423== by 0x29A30B: strbuf_grow (strbuf.c:66) ==4423== by 0x29A30B: strbuf_vaddf (strbuf.c:277) ==4423== by 0x242F9F: mkpath (path.c:454) ==4423== by 0x256CC7: refname_match (refs.c:364) ==4423== by 0x26C181: count_refspec_match (remote.c:1015) ==4423== by 0x26C181: match_explicit_lhs (remote.c:1126) ==4423== by 0x26C181: check_push_refs (remote.c:1409) ==4423== by 0x2ABB4D: transport_push (transport.c:870) ==4423== by 0x186703: push_with_options (push.c:332) ==4423== by 0x18746D: do_push (push.c:409) ==4423== by 0x18746D: cmd_push (push.c:566) ==4423== by 0x1183E0: run_builtin (git.c:352) ==4423== by 0x11973E: handle_builtin (git.c:539) ==4423== by 0x11973E: run_argv (git.c:593) ==4423== by 0x11973E: main (git.c:698) ==4423== Avoid this by using skip_prefix(), which knows not to go beyond the end of the string. Reported-by: Thomas Gummerer <t.gummerer@gmail.com> Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-27validate_headref: use get_oid_hex for detached HEADsLibravatar Jeff King1-2/+2
If a candidate HEAD isn't a symref, we check that it contains a viable sha1. But in a post-sha1 world, we should be checking whether it has any plausible object-id. We can do that by switching to get_oid_hex(). Note that both before and after this patch, we only check for a plausible object id at the start of the file, and then call that good enough. We ignore any content _after_ the hex, so a string like: 0123456789012345678901234567890123456789 foo is accepted. Though we do put extra bytes like this into some pseudorefs (e.g., FETCH_HEAD), we don't typically do so with HEAD. We could tighten this up by using parse_oid_hex(), like: if (!parse_oid_hex(buffer, &oid, &end) && *end++ == '\n' && *end == '\0') return 0; But we're probably better to remain on the loose side. We're just checking here for a plausible-looking repository directory, so heuristics are acceptable (if we really want to be meticulous, we should use the actual ref code to parse HEAD). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-27validate_headref: use skip_prefix for symref parsingLibravatar Jeff King1-9/+6
Since the previous commit guarantees that our symref buffer is NUL-terminated, we can just use skip_prefix() and friends to parse it. This is shorter and saves us having to deal with magic numbers and keeping the "len" counter up to date. While we're at it, let's name the rather obscure "buf" to "refname", since that is the thing we are parsing with it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-09-27validate_headref: NUL-terminate HEAD bufferLibravatar Jeff King1-0/+4
When we are checking to see if we have a git repo, we peek into the HEAD file and see if it's a plausible symlink, symref, or detached HEAD. For the latter two, we read the contents with read_in_full(), which means they aren't NUL-terminated. The symref check is careful to respect the length we got, but the sha1 check will happily parse up to 40 bytes, even if we read fewer. E.g.,: echo 1234 >.git/HEAD git rev-parse will parse 36 uninitialized bytes from our stack buffer. This isn't a big deal in practice. Our buffer is 256 bytes, so we know we'll never read outside of it. The worst case is that the uninitialized bytes look like valid hex, and we claim a bogus HEAD file is valid. The chances of this happening randomly are quite slim, but let's be careful. One option would be to check that "len == 41" before feeding the buffer to get_sha1_hex(). But we'd like to eventually prepare for a world with variable-length hashes. Let's NUL-terminate as soon as we've read the buffer (we already even leave a spare byte to do so!). That fixes this problem without depending on the size of an object id. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-08-04Merge tag 'v2.13.5' into maintLibravatar Junio C Hamano1-0/+5
2017-08-01Merge tag 'v2.12.4' into maintLibravatar Junio C Hamano1-0/+5
2017-07-30Merge tag 'v2.10.4' into maint-2.11Libravatar Junio C Hamano1-0/+5
Git 2.10.4
2017-07-30Merge tag 'v2.9.5' into maint-2.10Libravatar Junio C Hamano1-0/+5
Git 2.9.5
2017-07-30Merge tag 'v2.8.6' into maint-2.9Libravatar Junio C Hamano1-0/+5
Git 2.8.6
2017-07-30Merge tag 'v2.7.6' into maint-2.8Libravatar Junio C Hamano1-0/+5
Git 2.7.6
2017-07-28connect: factor out "looks like command line option" checkLibravatar Jeff King1-0/+5
We reject hostnames that start with a dash because they may be confused for command-line options. Let's factor out that notion into a helper function, as we'll use it in more places. And while it's simple now, it's not clear if some systems might need more complex logic to handle all cases. Signed-off-by: Jeff King <peff@peff.net> Reviewed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: add repo_worktree_path and strbuf_repo_worktree_pathLibravatar Brandon Williams1-0/+41
Introduce 'repo_worktree_path' and 'strbuf_repo_worktree_path' which take a repository struct and constructs a path relative to the repository's worktree. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: add repo_git_path and strbuf_repo_git_pathLibravatar Brandon Williams1-0/+21
Introduce 'repo_git_path' and 'strbuf_repo_git_path' which take a repository struct and constructs a path into the repository's git directory. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: worktree_git_path() should not use file relocationLibravatar Brandon Williams1-1/+2
git_path is a convenience function that usually produces a string $GIT_DIR/<path>. Since v2.5.0-rc0~143^2~35 (git_path(): be aware of file relocation in $GIT_DIR, 2014-11-30), as a side benefit callers get support for path relocation variables like $GIT_OBJECT_DIRECTORY: - git_path("index") is $GIT_INDEX_FILE when set - git_path("info/grafts") is $GIT_GRAFTS_FILE when set - git_path("objects/<foo>") is $GIT_OBJECT_DIRECTORY/<foo> when set - git_path("hooks/<foo>") is <foo> under core.hookspath when set - git_path("refs/<foo>") etc (see path.c::common_list) is relative to $GIT_COMMON_DIR instead of $GIT_DIR worktree_git_path, by comparison, is designed to resolve files in a specific worktree's git dir. Unfortunately, it shares code with git_path and performs the same relocation. The result is that paths that are meant to be relative to the specified worktree's git dir end up replaced by paths from environment variables within the current git dir. Luckily, no current callers pass such arguments. The relocation was noticed when testing the result of merging two patches under review, one of which introduces a caller: * The first patch made git prune check the index file in each worktree's git dir (using worktree_git_path(wt, "index")) for objects not to prune. This would trigger the unwanted relocation when GIT_INDEX_FILE is set, causing objects reachable from the index to be pruned. * The second patch simplified the relocation logic for index, info/grafts, objects, and hooks to happen unconditionally instead of based on whether environment or configuration variables are set. This caused the relocation to trigger even when GIT_INDEX_FILE is not set. [jn: rewrote commit message; skipping all relocation instead of just GIT_INDEX_FILE] Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: convert do_git_path to take a 'struct repository'Libravatar Brandon Williams1-14/+28
In preparation to adding 'git_path' like functions which operate on a 'struct repository' convert 'do_git_path' to take a 'struct repository'. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: convert strbuf_git_common_path to take a 'struct repository'Libravatar Brandon Williams1-5/+8
Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: always pass in commondir to update_common_dirLibravatar Brandon Williams1-3/+1
Instead of passing in 'NULL' and having 'update_common_dir()' query for the commondir, have the callers of 'update_common_dir()' be responsible for providing the commondir. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23path: create path.hLibravatar Brandon Williams1-0/+1
Move all path related declarations from cache.h to a new path.h header file. This makes cache.h smaller and makes it easier to add new path related functions. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-06-23environment: place key repository state in the_repositoryLibravatar Brandon Williams1-5/+6
Migrate 'git_dir', 'git_common_dir', 'git_object_dir', 'git_index_file', 'git_graft_file', and 'namespace' to be stored in 'the_repository'. Signed-off-by: Brandon Williams <bmwill@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-04-23Merge branch 'nd/conditional-config-include'Libravatar Junio C Hamano1-3/+8
$GIT_DIR may in some cases be normalized with all symlinks resolved while "gitdir" path expansion in the pattern does not receive the same treatment, leading to incorrect mismatch. This has been fixed. * nd/conditional-config-include: config: resolve symlinks in conditional include's patterns path.c: and an option to call real_path() in expand_user_path()
2017-04-19Merge branch 'nd/files-backend-git-dir'Libravatar Junio C Hamano1-28/+7
The "submodule" specific field in the ref_store structure is replaced with a more generic "gitdir" that can later be used also when dealing with ref_store that represents the set of refs visible from the other worktrees. * nd/files-backend-git-dir: (28 commits) refs.h: add a note about sorting order of for_each_ref_* t1406: new tests for submodule ref store t1405: some basic tests on main ref store t/helper: add test-ref-store to test ref-store functions refs: delete pack_refs() in favor of refs_pack_refs() files-backend: avoid ref api targeting main ref store refs: new transaction related ref-store api refs: add new ref-store api refs: rename get_ref_store() to get_submodule_ref_store() and make it public files-backend: replace submodule_allowed check in files_downcast() refs: move submodule code out of files-backend.c path.c: move some code out of strbuf_git_path_submodule() refs.c: make get_main_ref_store() public and use it refs.c: kill register_ref_store(), add register_submodule_ref_store() refs.c: flatten get_ref_store() a bit refs: rename lookup_ref_store() to lookup_submodule_ref_store() refs.c: introduce get_main_ref_store() files-backend: remove the use of git_path() files-backend: add and use files_ref_path() files-backend: add and use files_reflog_path() ...
2017-04-14path.c: and an option to call real_path() in expand_user_path()Libravatar Nguyễn Thái Ngọc Duy1-3/+8
In the next patch we need the ability to expand '~' to real_path($HOME). But we can't do that from outside because '~' is part of a pattern, not a true path. Add an option to expand_user_path() to do so. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-27path.c: move some code out of strbuf_git_path_submodule()Libravatar Nguyễn Thái Ngọc Duy1-28/+7
refs is learning to avoid path rewriting that is done by strbuf_git_path_submodule(). Factor out this code so it could be reused by refs_* functions. Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-13path.c: add xdg_cache_homeLibravatar Devin Lehmacher1-0/+15
We already have xdg_config_home to format paths relative to XDG_CONFIG_HOME. Let's provide a similar function xdg_cache_home to do the same for paths relative to XDG_CACHE_HOME. Signed-off-by: Devin Lehmacher <lehmacdj@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-01-17Merge branch 'js/normalize-path-copy-ceil' into maintLibravatar Junio C Hamano1-9/+14
A pathname that begins with "//" or "\\" on Windows is special but path normalization logic was unaware of it. * js/normalize-path-copy-ceil: normalize_path_copy(): fix pushing to //server/share/dir on Windows
2016-12-19Merge branch 'js/normalize-path-copy-ceil'Libravatar Junio C Hamano1-9/+14
A pathname that begins with "//" or "\\" on Windows is special but path normalization logic was unaware of it. * js/normalize-path-copy-ceil: normalize_path_copy(): fix pushing to //server/share/dir on Windows
2016-12-16normalize_path_copy(): fix pushing to //server/share/dir on WindowsLibravatar Johannes Sixt1-9/+14
normalize_path_copy() is not prepared to keep the double-slash of a //server/share/dir kind of path, but treats it like a regular POSIX style path and transforms it to /server/share/dir. The bug manifests when 'git push //server/share/dir master' is run, because tmp_objdir_add_as_alternate() uses the path in normalized form when it registers the quarantine object database via link_alt_odb_entries(). Needless to say that the directory cannot be accessed using the wrongly normalized path. Fix it by skipping all of the root part, not just a potential drive prefix. offset_1st_component takes care of this, see the implementation in compat/mingw.c::mingw_offset_1st_component(). Signed-off-by: Johannes Sixt <j6t@kdbg.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-10-27Merge branch 'rs/ring-buffer-wraparound'Libravatar Junio C Hamano1-1/+2
The code that we have used for the past 10+ years to cycle 4-element ring buffers turns out to be not quite portable in theoretical world. * rs/ring-buffer-wraparound: hex: make wraparound of the index into ring-buffer explicit
2016-10-26hex: make wraparound of the index into ring-buffer explicitLibravatar René Scharfe1-1/+2
Overflow is defined for unsigned integers, but not for signed ones. We could make the ring-buffer index in sha1_to_hex() and get_pathname() unsigned to be on the safe side to resolve this, but let's make it explicit that we are wrapping around at whatever the number of elements the ring-buffer has. The compiler is smart enough to turn modulus into bitmask for these codepaths that use ring-buffers of a size that is a power of 2. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-09-12Merge branch 'jk/diff-submodule-diff-inline'Libravatar Junio C Hamano1-6/+33
The "git diff --submodule={short,log}" mechanism has been enhanced to allow "--submodule=diff" to show the patch between the submodule commits bound to the superproject. * jk/diff-submodule-diff-inline: diff: teach diff to display submodule difference with an inline diff submodule: refactor show_submodule_summary with helper function submodule: convert show_submodule_summary to use struct object_id * allow do_submodule_path to work even if submodule isn't checked out diff: prepare for additional submodule formats graph: add support for --line-prefix on all graph-aware output diff.c: remove output_prefix_length field cache: add empty_tree_oid object and helper function
2016-08-31allow do_submodule_path to work even if submodule isn't checked outLibravatar Jacob Keller1-6/+33
Currently, do_submodule_path will attempt locating the .git directory by using read_gitfile on <path>/.git. If this fails it just assumes the <path>/.git is actually a git directory. This is good because it allows for handling submodules which were cloned in a regular manner first before being added to the superproject. Unfortunately this fails if the <path> is not actually checked out any longer, such as by removing the directory. Fix this by checking if the directory we found is actually a gitdir. In the case it is not, attempt to lookup the submodule configuration and find the name of where it is stored in the .git/modules/ directory of the superproject. If we can't locate the submodule configuration, this might occur because for example a submodule gitlink was added but the corresponding .gitmodules file was not properly updated. A die() here would not be pleasant to the users of submodule diff formats, so instead, modify do_submodule_path() to return an error code: - git_pathdup_submodule() returns NULL when we fail to find a path. - strbuf_git_path_submodule() propagates the error code to the caller. Modify the callers of these functions to check the error code and fail properly. This ensures we don't attempt to use a bad path that doesn't match the corresponding submodule. Because this change fixes add_submodule_odb() to work even if the submodule is not checked out, update the wording of the submodule log diff format to correctly display that the submodule is "not initialized" instead of "not checked out" Add tests to ensure this change works as expected. Signed-off-by: Jacob Keller <jacob.keller@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-19Merge branch 'ab/hooks'Libravatar Junio C Hamano1-0/+2
"git rev-parse --git-path hooks/<hook>" learned to take core.hooksPath configuration variable (introduced during 2.9 cycle) into account. * ab/hooks: rev-parse: respect core.hooksPath in --git-path
2016-08-16rev-parse: respect core.hooksPath in --git-pathLibravatar Johannes Schindelin1-0/+2
The idea of the --git-path option is not only to avoid having to prefix paths with the output of --git-dir all the time, but also to respect overrides for specific common paths inside the .git directory (e.g. `git rev-parse --git-path objects` will report the value of the environment variable GIT_OBJECT_DIRECTORY, if set). When introducing the core.hooksPath setting, we forgot to adjust git_path() accordingly. This patch fixes that. While at it, revert the special-casing of core.hooksPath in run-command.c, as it is now no longer needed. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-08-08Merge branch 'rs/use-strbuf-addbuf' into maintLibravatar Junio C Hamano1-1/+1
Code cleanup. * rs/use-strbuf-addbuf: strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf() use strbuf_addbuf() for appending a strbuf to another
2016-07-25Merge branch 'rs/use-strbuf-addbuf'Libravatar Junio C Hamano1-1/+1
Code cleanup. * rs/use-strbuf-addbuf: strbuf: avoid calling strbuf_grow() twice in strbuf_addbuf() use strbuf_addbuf() for appending a strbuf to another
2016-07-19use strbuf_addbuf() for appending a strbuf to anotherLibravatar René Scharfe1-1/+1
Use strbuf_addbuf() where possible; it's shorter and more efficient. Signed-off-by: Rene Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-26Merge branch 'lp/typofixes' into maintLibravatar Junio C Hamano1-1/+1
Typofixes. * lp/typofixes: typofix: assorted typofixes in comments, documentation and messages
2016-05-23Merge branch 'nd/worktree-various-heads'Libravatar Junio C Hamano1-6/+47
The experimental "multiple worktree" feature gains more safety to forbid operations on a branch that is checked out or being actively worked on elsewhere, by noticing that e.g. it is being rebased. * nd/worktree-various-heads: branch: do not rename a branch under bisect or rebase worktree.c: check whether branch is bisected in another worktree wt-status.c: split bisect detection out of wt_status_get_state() worktree.c: check whether branch is rebased in another worktree worktree.c: avoid referencing to worktrees[i] multiple times wt-status.c: make wt_status_check_rebase() work on any worktree wt-status.c: split rebase detection out of wt_status_get_state() path.c: refactor and add worktree_git_path() worktree.c: mark current worktree worktree.c: make find_shared_symref() return struct worktree * worktree.c: store "id" instead of "git_dir" path.c: add git_common_path() and strbuf_git_common_path() dir.c: rename str(n)cmp_icase to fspath(n)cmp
2016-05-17Merge branch 'lp/typofixes'Libravatar Junio C Hamano1-1/+1
* lp/typofixes: typofix: assorted typofixes in comments, documentation and messages
2016-05-06typofix: assorted typofixes in comments, documentation and messagesLibravatar Li Peng1-1/+1
Many instances of duplicate words (e.g. "the the path") and a few typoes are fixed, originally in multiple patches. wildmatch: fix duplicate words of "the" t: fix duplicate words of "output" transport-helper: fix duplicate words of "read" Git.pm: fix duplicate words of "return" path: fix duplicate words of "look" pack-protocol.txt: fix duplicate words of "the" precompose-utf8: fix typo of "sequences" split-index: fix typo worktree.c: fix typo remote-ext: fix typo utf8: fix duplicate words of "the" git-cvsserver: fix duplicate words Signed-off-by: Li Peng <lip@dtdream.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-05-02Merge branch 'jk/check-repository-format' into maintLibravatar Junio C Hamano1-5/+5
The repository set-up sequence has been streamlined (the biggest change is that there is no longer git_config_early()), so that we do not attempt to look into refs/* when we know we do not have a Git repository. * jk/check-repository-format: verify_repository_format: mark messages for translation setup: drop repository_format_version global setup: unify repository version callbacks init: use setup.c's repo version verification setup: refactor repo format reading and verification config: drop git_config_early check_repository_format_gently: stop using git_config_early lazily load core.sharedrepository wrap shared_repository global in get/set accessors setup: document check_repository_format()