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0b6ec075df
The fsck code purports to handle buffers that are not NUL-terminated,
but fsck_ident() uses some string functions. This works OK in practice,
as explained in 8e4309038f (fsck: do not assume NUL-termination of
buffers, 2023-01-19). Before calling fsck_ident() we'll have called
verify_headers(), which makes sure we have at least a trailing newline.
And none of our string-like functions will walk past that newline.
However, that makes this code at the top of fsck_ident() very confusing:
*ident = strchrnul(*ident, '\n');
if (**ident == '\n')
(*ident)++;
We should always see that newline, or our memory safety assumptions have
been violated! Further, using strchrnul() is weird, since the whole
point is that if the newline is not there, we don't necessarily have a
NUL at all, and might read off the end of the buffer.
So let's have callers pass in the boundary of our buffer, which lets us
safely find the newline with memchr(). And if it is not there, this is a
BUG(), because it means our caller did not validate the input with
verify_headers() as it was supposed to (and we are better off bailing
rather than having memory-safety problems).
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Git - fast, scalable, distributed revision control system
Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.
Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.
Please read the file INSTALL for installation instructions.
Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.
See Documentation/gittutorial.adoc to get started, then see
Documentation/giteveryday.adoc for a useful minimum set of commands, and
Documentation/git-<commandname>.adoc for documentation of each command.
If git has been correctly installed, then the tutorial can also be
read with man gittutorial or git help tutorial, and the
documentation of each command with man git-<commandname> or git help <commandname>.
CVS users may also want to read Documentation/gitcvs-migration.adoc
(man gitcvs-migration or git help cvs-migration if git is
installed).
The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).
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string translations (localization l10) should see po/README.md
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The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.
The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):
- random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
- stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
- "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
- "goddamn idiotic truckload of sh*t": when it breaks