Beispiel #1
0
static int calc_shared_perm(int mode)
{
	int tweak;

	if (get_shared_repository() < 0)
		tweak = -get_shared_repository();
	else
		tweak = get_shared_repository();

	if (!(mode & S_IWUSR))
		tweak &= ~0222;
	if (mode & S_IXUSR)
		/* Copy read bits to execute bits */
		tweak |= (tweak & 0444) >> 2;
	if (get_shared_repository() < 0)
		mode = (mode & ~0777) | tweak;
	else
		mode |= tweak;

	return mode;
}
Beispiel #2
0
int adjust_shared_perm(const char *path)
{
	int old_mode, new_mode;

	if (!get_shared_repository())
		return 0;
	if (get_st_mode_bits(path, &old_mode) < 0)
		return -1;

	new_mode = calc_shared_perm(old_mode);
	if (S_ISDIR(old_mode)) {
		/* Copy read bits to execute bits */
		new_mode |= (new_mode & 0444) >> 2;
		new_mode |= FORCE_DIR_SET_GID;
	}

	if (((old_mode ^ new_mode) & ~S_IFMT) &&
			chmod(path, (new_mode & ~S_IFMT)) < 0)
		return -2;
	return 0;
}
Beispiel #3
0
int init_db(const char *git_dir, const char *real_git_dir,
	    const char *template_dir, unsigned int flags)
{
	int reinit;
	int exist_ok = flags & INIT_DB_EXIST_OK;
	char *original_git_dir = real_pathdup(git_dir, 1);

	if (real_git_dir) {
		struct stat st;

		if (!exist_ok && !stat(git_dir, &st))
			die(_("%s already exists"), git_dir);

		if (!exist_ok && !stat(real_git_dir, &st))
			die(_("%s already exists"), real_git_dir);

		set_git_dir(real_path(real_git_dir));
		git_dir = get_git_dir();
		separate_git_dir(git_dir, original_git_dir);
	}
	else {
		set_git_dir(real_path(git_dir));
		git_dir = get_git_dir();
	}
	startup_info->have_repository = 1;

	/* Just look for `init.templatedir` and `core.hidedotfiles` */
	git_config(git_init_db_config, NULL);

	safe_create_dir(git_dir, 0);

	init_is_bare_repository = is_bare_repository();

	/* Check to see if the repository version is right.
	 * Note that a newly created repository does not have
	 * config file, so this will not fail.  What we are catching
	 * is an attempt to reinitialize new repository with an old tool.
	 */
	check_repository_format();

	reinit = create_default_files(template_dir, original_git_dir);

	create_object_directory();

	if (get_shared_repository()) {
		char buf[10];
		/* We do not spell "group" and such, so that
		 * the configuration can be read by older version
		 * of git. Note, we use octal numbers for new share modes,
		 * and compatibility values for PERM_GROUP and
		 * PERM_EVERYBODY.
		 */
		if (get_shared_repository() < 0)
			/* force to the mode value */
			xsnprintf(buf, sizeof(buf), "0%o", -get_shared_repository());
		else if (get_shared_repository() == PERM_GROUP)
			xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_GROUP);
		else if (get_shared_repository() == PERM_EVERYBODY)
			xsnprintf(buf, sizeof(buf), "%d", OLD_PERM_EVERYBODY);
		else
			BUG("invalid value for shared_repository");
		git_config_set("core.sharedrepository", buf);
		git_config_set("receive.denyNonFastforwards", "true");
	}

	if (!(flags & INIT_DB_QUIET)) {
		int len = strlen(git_dir);

		if (reinit)
			printf(get_shared_repository()
			       ? _("Reinitialized existing shared Git repository in %s%s\n")
			       : _("Reinitialized existing Git repository in %s%s\n"),
			       git_dir, len && git_dir[len-1] != '/' ? "/" : "");
		else
			printf(get_shared_repository()
			       ? _("Initialized empty shared Git repository in %s%s\n")
			       : _("Initialized empty Git repository in %s%s\n"),
			       git_dir, len && git_dir[len-1] != '/' ? "/" : "");
	}

	free(original_git_dir);
	return 0;
}
Beispiel #4
0
/*
 * If you want to, you can share the DB area with any number of branches.
 * That has advantages: you can save space by sharing all the SHA1 objects.
 * On the other hand, it might just make lookup slower and messier. You
 * be the judge.  The default case is to have one DB per managed directory.
 */
int cmd_init_db(int argc, const char **argv, const char *prefix)
{
	const char *git_dir;
	const char *real_git_dir = NULL;
	const char *work_tree;
	const char *template_dir = NULL;
	unsigned int flags = 0;
	const struct option init_db_options[] = {
		OPT_STRING(0, "template", &template_dir, N_("template-directory"),
				N_("directory from which templates will be used")),
		OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
				N_("create a bare repository"), 1),
		{ OPTION_CALLBACK, 0, "shared", &init_shared_repository,
			N_("permissions"),
			N_("specify that the git repository is to be shared amongst several users"),
			PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
		OPT_BIT('q', "quiet", &flags, N_("be quiet"), INIT_DB_QUIET),
		OPT_STRING(0, "separate-git-dir", &real_git_dir, N_("gitdir"),
			   N_("separate git dir from working tree")),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);

	if (real_git_dir && !is_absolute_path(real_git_dir))
		real_git_dir = real_pathdup(real_git_dir, 1);

	if (argc == 1) {
		int mkdir_tried = 0;
	retry:
		if (chdir(argv[0]) < 0) {
			if (!mkdir_tried) {
				int saved;
				/*
				 * At this point we haven't read any configuration,
				 * and we know shared_repository should always be 0;
				 * but just in case we play safe.
				 */
				saved = get_shared_repository();
				set_shared_repository(0);
				switch (safe_create_leading_directories_const(argv[0])) {
				case SCLD_OK:
				case SCLD_PERMS:
					break;
				case SCLD_EXISTS:
					errno = EEXIST;
					/* fallthru */
				default:
					die_errno(_("cannot mkdir %s"), argv[0]);
					break;
				}
				set_shared_repository(saved);
				if (mkdir(argv[0], 0777) < 0)
					die_errno(_("cannot mkdir %s"), argv[0]);
				mkdir_tried = 1;
				goto retry;
			}
			die_errno(_("cannot chdir to %s"), argv[0]);
		}
	} else if (0 < argc) {
		usage(init_db_usage[0]);
	}
	if (is_bare_repository_cfg == 1) {
		char *cwd = xgetcwd();
		setenv(GIT_DIR_ENVIRONMENT, cwd, argc > 0);
		free(cwd);
	}

	if (init_shared_repository != -1)
		set_shared_repository(init_shared_repository);

	/*
	 * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
	 * without --bare.  Catch the error early.
	 */
	git_dir = xstrdup_or_null(getenv(GIT_DIR_ENVIRONMENT));
	work_tree = xstrdup_or_null(getenv(GIT_WORK_TREE_ENVIRONMENT));
	if ((!git_dir || is_bare_repository_cfg == 1) && work_tree)
		die(_("%s (or --work-tree=<directory>) not allowed without "
			  "specifying %s (or --git-dir=<directory>)"),
		    GIT_WORK_TREE_ENVIRONMENT,
		    GIT_DIR_ENVIRONMENT);

	/*
	 * Set up the default .git directory contents
	 */
	if (!git_dir)
		git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;

	if (is_bare_repository_cfg < 0)
		is_bare_repository_cfg = guess_repository_type(git_dir);

	if (!is_bare_repository_cfg) {
		const char *git_dir_parent = strrchr(git_dir, '/');
		if (git_dir_parent) {
			char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
			git_work_tree_cfg = real_pathdup(rel, 1);
			free(rel);
		}
		if (!git_work_tree_cfg)
			git_work_tree_cfg = xgetcwd();
		if (work_tree)
			set_git_work_tree(work_tree);
		else
			set_git_work_tree(git_work_tree_cfg);
		if (access(get_git_work_tree(), X_OK))
			die_errno (_("Cannot access work tree '%s'"),
				   get_git_work_tree());
	}
	else {
		if (work_tree)
			set_git_work_tree(work_tree);
	}

	UNLEAK(real_git_dir);
	UNLEAK(git_dir);
	UNLEAK(work_tree);

	flags |= INIT_DB_EXIST_OK;
	return init_db(git_dir, real_git_dir, template_dir, flags);
}
Beispiel #5
0
static int create_default_files(const char *template_path,
				const char *original_git_dir)
{
	struct stat st1;
	struct strbuf buf = STRBUF_INIT;
	char *path;
	char repo_version_string[10];
	char junk[2];
	int reinit;
	int filemode;
	struct strbuf err = STRBUF_INIT;

	/* Just look for `init.templatedir` */
	git_config(git_init_db_config, NULL);

	/*
	 * First copy the templates -- we might have the default
	 * config file there, in which case we would want to read
	 * from it after installing.
	 *
	 * Before reading that config, we also need to clear out any cached
	 * values (since we've just potentially changed what's available on
	 * disk).
	 */
	copy_templates(template_path);
	git_config_clear();
	reset_shared_repository();
	git_config(git_default_config, NULL);

	/*
	 * We must make sure command-line options continue to override any
	 * values we might have just re-read from the config.
	 */
	is_bare_repository_cfg = init_is_bare_repository;
	if (init_shared_repository != -1)
		set_shared_repository(init_shared_repository);

	/*
	 * We would have created the above under user's umask -- under
	 * shared-repository settings, we would need to fix them up.
	 */
	if (get_shared_repository()) {
		adjust_shared_perm(get_git_dir());
	}

	/*
	 * We need to create a "refs" dir in any case so that older
	 * versions of git can tell that this is a repository.
	 */
	safe_create_dir(git_path("refs"), 1);
	adjust_shared_perm(git_path("refs"));

	if (refs_init_db(&err))
		die("failed to set up refs db: %s", err.buf);

	/*
	 * Create the default symlink from ".git/HEAD" to the "master"
	 * branch, if it does not exist yet.
	 */
	path = git_path_buf(&buf, "HEAD");
	reinit = (!access(path, R_OK)
		  || readlink(path, junk, sizeof(junk)-1) != -1);
	if (!reinit) {
		if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
			exit(1);
	}

	/* This forces creation of new config file */
	xsnprintf(repo_version_string, sizeof(repo_version_string),
		  "%d", GIT_REPO_VERSION);
	git_config_set("core.repositoryformatversion", repo_version_string);

	/* Check filemode trustability */
	path = git_path_buf(&buf, "config");
	filemode = TEST_FILEMODE;
	if (TEST_FILEMODE && !lstat(path, &st1)) {
		struct stat st2;
		filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
				!lstat(path, &st2) &&
				st1.st_mode != st2.st_mode &&
				!chmod(path, st1.st_mode));
		if (filemode && !reinit && (st1.st_mode & S_IXUSR))
			filemode = 0;
	}
	git_config_set("core.filemode", filemode ? "true" : "false");

	if (is_bare_repository())
		git_config_set("core.bare", "true");
	else {
		const char *work_tree = get_git_work_tree();
		git_config_set("core.bare", "false");
		/* allow template config file to override the default */
		if (log_all_ref_updates == LOG_REFS_UNSET)
			git_config_set("core.logallrefupdates", "true");
		if (needs_work_tree_config(original_git_dir, work_tree))
			git_config_set("core.worktree", work_tree);
	}

	if (!reinit) {
		/* Check if symlink is supported in the work tree */
		path = git_path_buf(&buf, "tXXXXXX");
		if (!close(xmkstemp(path)) &&
		    !unlink(path) &&
		    !create_symlink(NULL, "testing", path) &&
		    !lstat(path, &st1) &&
		    S_ISLNK(st1.st_mode))
			unlink(path); /* good */
		else
			git_config_set("core.symlinks", "false");

		/* Check if the filesystem is case-insensitive */
		path = git_path_buf(&buf, "CoNfIg");
		if (!access(path, F_OK))
			git_config_set("core.ignorecase", "true");
		probe_utf8_pathname_composition();
	}

	strbuf_release(&buf);
	return reinit;
}