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This is setup that should be done in every program for
safety, but we never got around to adding it everywhere (so
builtins benefited from the call in git.c, but any external
commands did not). Putting it in the common main() gives us
this safety everywhere.
Note that the case in daemon.c is a little funny. We wait
until we know whether we want to daemonize, and then either:
- call daemonize(), which will close stdio and reopen it to
/dev/null under the hood
- sanitize_stdfds(), to fix up any odd cases
But that is way too late; the point of sanitizing is to give
us reliable descriptors on 0/1/2, and we will already have
executed code, possibly called die(), etc. The sanitizing
should be the very first thing that happens.
With this patch, git-daemon will sanitize first, and can
remove the call in the non-daemonize case. It does mean that
daemonize() may just end up closing the descriptors we
opened, but that's not a big deal (it's not wrong to do so,
nor is it really less optimal than the case where our parent
process redirected us from /dev/null ahead of time).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Every program which links against libgit.a must call this
function, or risk hitting an assert() in system_path() that
checks whether we have configured argv0_path (though only
when RUNTIME_PREFIX is defined, so essentially only on
Windows).
Looking at the diff, you can see that putting it into the
common main() saves us having to do it individually in each
of the external commands. But what you can't see are the
cases where we _should_ have been doing so, but weren't
(e.g., git-credential-store, and all of the t/helper test
programs).
This has been an accident-waiting-to-happen for a long time,
but wasn't triggered until recently because it involves one
of those programs actually calling system_path(). That
happened with git-credential-store in v2.8.0 with ae5f677
(lazily load core.sharedrepository, 2016-03-11). The
program:
- takes a lock file, which...
- opens a tempfile, which...
- calls adjust_shared_perm to fix permissions, which...
- lazy-loads the config (as of ae5f677), which...
- calls system_path() to find the location of
/etc/gitconfig
On systems with RUNTIME_PREFIX, this means credential-store
reliably hits that assert() and cannot be used.
We never noticed in the test suite, because we set
GIT_CONFIG_NOSYSTEM there, which skips the system_path()
lookup entirely. But if we were to tweak git_config() to
find /etc/gitconfig even when we aren't going to open it,
then the test suite shows multiple failures (for
credential-store, and for some other test helpers). I didn't
include that tweak here because it's way too specific to
this particular call to be worth carrying around what is
essentially dead code.
The implementation is fairly straightforward, with one
exception: there is exactly one caller (git.c) that actually
cares about the result of the function, and not the
side-effect of setting up argv0_path. We can accommodate
that by simply replacing the value of argv[0] in the array
we hand down to cmd_main().
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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There are certain startup tasks that we expect every git
process to do. In some cases this is just to improve the
quality of the program (e.g., setting up gettext()). In
others it is a requirement for using certain functions in
libgit.a (e.g., system_path() expects that you have called
git_extract_argv0_path()).
Most commands are builtins and are covered by the git.c
version of main(). However, there are still a few external
commands that use their own main(). Each of these has to
remember to include the correct startup sequence, and we are
not always consistent.
Rather than just fix the inconsistencies, let's make this
harder to get wrong by providing a common main() that can
run this standard startup.
We basically have two options to do this:
- the compat/mingw.h file already does something like this by
adding a #define that replaces the definition of main with a
wrapper that calls mingw_startup().
The upside is that the code in each program doesn't need
to be changed at all; it's rewritten on the fly by the
preprocessor.
The downside is that it may make debugging of the startup
sequence a bit more confusing, as the preprocessor is
quietly inserting new code.
- the builtin functions are all of the form cmd_foo(),
and git.c's main() calls them.
This is much more explicit, which may make things more
obvious to somebody reading the code. It's also more
flexible (because of course we have to figure out _which_
cmd_foo() to call).
The downside is that each of the builtins must define
cmd_foo(), instead of just main().
This patch chooses the latter option, preferring the more
explicit approach, even though it is more invasive. We
introduce a new file common-main.c, with the "real" main. It
expects to call cmd_main() from whatever other objects it is
linked against.
We link common-main.o against anything that links against
libgit.a, since we know that such programs will need to do
this setup. Note that common-main.o can't actually go inside
libgit.a, as the linker would not pick up its main()
function automatically (it has no callers).
The rest of the patch is just adjusting all of the various
external programs (mostly in t/helper) to use cmd_main().
I've provided a global declaration for cmd_main(), which
means that all of the programs also need to match its
signature. In particular, many functions need to switch to
"const char **" instead of "char **" for argv. This effect
ripples out to a few other variables and functions, as well.
This makes the patch even more invasive, but the end result
is much better. We should be treating argv strings as const
anyway, and now all programs conform to the same signature
(which also matches the way builtins are defined).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The "are we talking with TTY, doing an interactive session?"
detection has been updated to work better for "Git for Windows".
* kb/msys2-tty:
mingw: make isatty() recognize MSYS2's pseudo terminals (/dev/pty*)
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"git difftool" learned to handle unmerged paths correctly in
dir-diff mode.
* da/difftool:
difftool: handle unmerged files in dir-diff mode
difftool: initialize variables for readability
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A couple of bugs around core.autocrlf have been fixed.
* tb/core-eol-fix:
convert.c: ident + core.autocrlf didn't work
t0027: test cases for combined attributes
convert: allow core.autocrlf=input and core.eol=crlf
t0027: make commit_chk_wrnNNO() reliable
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Many commands normalize command line arguments from NFD to NFC
variant of UTF-8 on OSX, but commands in the "diff" family did
not, causing "git diff $path" to complain that no such path is
known to Git. They have been taught to do the normalization.
* ar/diff-args-osx-precompose:
diff: run arguments through precompose_argv
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Correct faulty recommendation to use "git submodule deinit ." when
de-initialising all submodules, which would result in a strange
error message in a pathological corner case.
* sb/submodule-deinit-all:
submodule deinit: require '--all' instead of '.' for all submodules
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"http.cookieFile" configuration variable clearly wants a pathname,
but we forgot to treat it as such by e.g. applying tilde expansion.
* bn/http-cookiefile-config:
http: expand http.cookieFile as a path
Documentation: config: improve word ordering for http.cookieFile
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Running tests with '-x' option to trace the individual command
executions is a useful way to debug test scripts, but some tests
that capture the standard error stream and check what the command
said can be broken with the trace output mixed in. When running
our tests under "bash", however, we can redirect the trace output
to another file descriptor to keep the standard error of programs
being tested intact.
* jk/test-send-sh-x-trace-elsewhere:
test-lib: set BASH_XTRACEFD automatically
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"git describe --contains" often made a hard-to-justify choice of
tag to give name to a given commit, because it tried to come up
with a name with smallest number of hops from a tag, causing an old
commit whose close descendant that is recently tagged were not
described with respect to an old tag but with a newer tag. It did
not help that its computation of "hop" count was further tweaked to
penalize being on a side branch of a merge. The logic has been
updated to favor using the tag with the oldest tagger date, which
is a lot easier to explain to the end users: "We describe a commit
in terms of the (chronologically) oldest tag that contains the
commit."
* js/name-rev-use-oldest-ref:
name-rev: include taggerdate in considering the best name
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Many 'linkgit:<git documentation page>' references were broken,
which are all fixed with this.
* jc/linkgit-fix:
Documentation: fix linkgit references
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CI test was taught to build documentation pages.
* ls/travis-build-doc:
travis-ci: build documentation
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"git fsck" learned to catch NUL byte in a commit object as
potential error and warn.
* jc/fsck-nul-in-commit:
fsck: detect and warn a commit with embedded NUL
fsck_commit_buffer(): do not special case the last validation
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Portability enhancement for "rebase -i" to help platforms whose
shell does not like "for i in <empty>" (which is not POSIX-kosher).
* jk/rebase-interative-eval-fix:
rebase--interactive: avoid empty list in shell for-loop
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On Windows, .git and optionally any files whose name starts with a
dot are now marked as hidden, with a core.hideDotFiles knob to
customize this behaviour.
* js/windows-dotgit:
mingw: remove unnecessary definition
mingw: introduce the 'core.hideDotFiles' setting
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Documentation for "git merge --verify-signatures" has been updated
to clarify that the signature of only the commit at the tip is
verified. Also the phrasing used for signature and key validity is
adjusted to align with that used by OpenPGP.
* kf/gpg-sig-verification-doc:
Documentation: clarify signature verification
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Typofixes.
* lp/typofixes:
typofix: assorted typofixes in comments, documentation and messages
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Test fix.
* sb/z-is-gnutar-ism:
t6041: do not compress backup tar file
t3513: do not compress backup tar file
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Mark several messages for translation.
* va/i18n-misc-updates:
i18n: unpack-trees: avoid substituting only a verb in sentences
i18n: builtin/pull.c: split strings marked for translation
i18n: builtin/pull.c: mark placeholders for translation
i18n: git-parse-remote.sh: mark strings for translation
i18n: branch: move comment for translators
i18n: branch: unmark string for translation
i18n: builtin/rm.c: remove a comma ',' from string
i18n: unpack-trees: mark strings for translation
i18n: builtin/branch.c: mark option for translation
i18n: index-pack: use plural string instead of normal one
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Doc formatting fixes.
* bn/config-doc-tt-varnames:
config: consistently format $variables in monospaced font
config: describe 'pathname' value type
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Message fix.
* nd/remote-plural-ours-plus-theirs:
remote.c: specify correct plural form in "commit diverge" message
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Test fix.
* ak/t4151-ls-files-could-be-empty:
t4151: make sure argument to 'test -z' is given
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Test fix.
* jc/test-seq:
test-lib-functions.sh: rewrite test_seq without Perl
test-lib-functions.sh: remove misleading comment on test_seq
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Test fix.
* tb/t5601-sed-fix:
t5601: Remove trailing space in sed expression
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Message fix.
* va/i18n-remote-comment-to-align:
i18n: remote: add comment for translators
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Typofix.
* va/mailinfo-doc-typofix:
Documentation/git-mailinfo: fix typo
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* maint-2.7:
archive-tar: convert snprintf to xsnprintf
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MSYS2 emulates pseudo terminals via named pipes, and isatty() returns 0
for such file descriptors. Therefore, some interactive functionality
(such as launching a pager, asking if a failed unlink should be repeated
etc.) doesn't work when run in a terminal emulator that uses MSYS2's
ptys (such as mintty).
However, MSYS2 uses special names for its pty pipes ('msys-*-pty*'),
which allows us to distinguish them from normal piped input / output.
On startup, check if stdin / stdout / stderr are connected to such pipes
using the NtQueryObject API from NTDll.dll. If the names match, adjust
the flags in MSVCRT's ioinfo structure accordingly.
Signed-off-by: Karsten Blees <blees@dcon.de>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* jk/war-on-sprintf:
archive-tar: convert snprintf to xsnprintf
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Commit f2f0267 (archive-tar: use xsnprintf for trivial
formatting, 2015-09-24) converted cases of "sprintf" to
"xsnprintf", but accidentally left one as just "snprintf".
This meant that we could silently truncate the resulting
buffer instead of flagging an error.
In practice, this is impossible to achieve, as we are
formatting a ustar checksum, which can be at most 7
characters. But the point of xsnprintf is to document and
check for "should be impossible" conditions; this site was
just accidentally mis-converted during f2f0267.
Noticed-by: Paul Green <Paul.Green@stratus.com>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* sb/misc-cleanups:
submodule-config: don't shadow `cache`
config.c: drop local variable
credential-cache, send_request: close fd when done
bundle: don't leak an fd in case of early return
abbrev_sha1_in_line: don't leak memory
notes: don't leak memory in git_config_get_notes_strategy
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Doc update.
* ew/doc-split-pack-disables-bitmap:
pack-objects: warn on split packs disabling bitmaps
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* sb/clean-test-fix:
t7300: mark test with SANITY
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* rn/glossary-typofix:
Documentation: fix typo 'In such these cases'
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* ew/normal-to-e:
.mailmap: update to my shorter email address
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Doc update.
* sb/config-exit-status-list:
config doc: improve exit code listing
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Code cleanup.
* rt/string-list-lookup-cleanup:
string_list: use string-list API in unsorted_string_list_lookup()
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Code fixup.
* jk/fix-attribute-macro-in-2.5:
remote.c: spell __attribute__ correctly
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Code cleanup.
* sg/test-lib-simplify-expr-away:
test-lib: simplify '--option=value' parsing
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Code cleanup.
* nd/remove-unused:
wrapper.c: delete dead function git_mkstemps()
dir.c: remove dead function fnmatch_icase()
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Some multi-byte encoding can have a backslash byte as a later part
of one letter, which would confuse "highlight" filter used in
gitweb.
* sk/gitweb-highlight-encoding:
gitweb: apply fallback encoding before highlight
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* ls/travis-submitting-patches:
Documentation: add setup instructions for Travis CI
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* js/close-packs-before-gc:
t5510: run auto-gc in the foreground
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Recent update to Git LFS broke "git p4" by changing the output from
its "lfs pointer" subcommand.
* ls/p4-lfs:
git-p4: fix Git LFS pointer parsing
travis-ci: express Linux/OS X dependency versions more clearly
travis-ci: update Git-LFS and P4 to the latest version
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Fix a broken test.
* ls/p4-lfs-test-fix-2.7.0:
t9824: fix wrong reference value
t9824: fix broken &&-chain in a subshell
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Jeff King
Junio C Hamano
Karsten Blees