The "line" member of a packet_reader struct is marked as const. This
kind of makes sense, because it's not its own allocated buffer that
should be freed, and we often use const to indicate that. But it is
always writable, because it points into the non-const "buffer" member.
And we rely on this writability in places like send-pack and
receive-pack, where we parse incoming packet contents by writing NULs
over delimiters. This has traditionally worked because we implicitly
cast away the constness with strchr() like:
const char *head;
char *p;
head = reader->line;
p = strchr(head, ' ');
Since C23 libc provides a generic strchr() to detect this implicit
const removal, this now generate a compiler warning on some platforms
(like recent glibc).
We can fix it by marking "line" as non-const, as well as a few
intermediate variables (like "head" in the above example). Note that by
itself, switching to a non-const variable would cause problems with this
line in send-pack.c:
if (!skip_prefix(reader->line, "unpack ", &reader->line))
But due to our skip_prefix() magic introduced in the previous commit,
this compiles fine (both the in and out-parameters are non-const, so we
know it is safe).
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>.
Those wishing to help with error message, usage and informational message
string translations (localization l10) should see po/README.md
(a po file is a Portable Object file that holds the translations).
Issues which are security relevant should be disclosed privately to
the Git Security mailing list git-security@googlegroups.com.
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
