path.c 37.6 KB
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/*
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 * Copyright (C) the libgit2 contributors. All rights reserved.
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 *
 * This file is part of libgit2, distributed under the GNU GPL v2 with
 * a Linking Exception. For full terms see the included COPYING file.
 */
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#include "common.h"
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#include "path.h"
#include "posix.h"
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#include "repository.h"
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#ifdef GIT_WIN32
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#include "win32/posix.h"
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#include "win32/w32_buffer.h"
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#include "win32/w32_util.h"
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#include "win32/version.h"
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#else
#include <dirent.h>
#endif
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#include <stdio.h>
#include <ctype.h>

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#define LOOKS_LIKE_DRIVE_PREFIX(S) (git__isalpha((S)[0]) && (S)[1] == ':')

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#ifdef GIT_WIN32
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static bool looks_like_network_computer_name(const char *path, int pos)
{
	if (pos < 3)
		return false;

	if (path[0] != '/' || path[1] != '/')
		return false;

	while (pos-- > 2) {
		if (path[pos] == '/')
			return false;
	}

	return true;
}
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#endif
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/*
 * Based on the Android implementation, BSD licensed.
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 * http://android.git.kernel.org/
 *
 * Copyright (C) 2008 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * * Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
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 */
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int git_path_basename_r(git_buf *buffer, const char *path)
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{
	const char *endp, *startp;
	int len, result;

	/* Empty or NULL string gets treated as "." */
	if (path == NULL || *path == '\0') {
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		startp = ".";
		len		= 1;
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		goto Exit;
	}

	/* Strip trailing slashes */
	endp = path + strlen(path) - 1;
	while (endp > path && *endp == '/')
		endp--;

	/* All slashes becomes "/" */
	if (endp == path && *endp == '/') {
		startp = "/";
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		len	= 1;
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		goto Exit;
	}

	/* Find the start of the base */
	startp = endp;
	while (startp > path && *(startp - 1) != '/')
		startp--;

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	/* Cast is safe because max path < max int */
	len = (int)(endp - startp + 1);
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Exit:
	result = len;

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	if (buffer != NULL && git_buf_set(buffer, startp, len) < 0)
		return -1;
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	return result;
}

/*
 * Based on the Android implementation, BSD licensed.
 * Check http://android.git.kernel.org/
 */
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int git_path_dirname_r(git_buf *buffer, const char *path)
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{
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	const char *endp;
	int result, len;

	/* Empty or NULL string gets treated as "." */
	if (path == NULL || *path == '\0') {
		path = ".";
		len = 1;
		goto Exit;
	}

	/* Strip trailing slashes */
	endp = path + strlen(path) - 1;
	while (endp > path && *endp == '/')
		endp--;

	/* Find the start of the dir */
	while (endp > path && *endp != '/')
		endp--;

	/* Either the dir is "/" or there are no slashes */
	if (endp == path) {
		path = (*endp == '/') ? "/" : ".";
		len = 1;
		goto Exit;
	}

	do {
		endp--;
	} while (endp > path && *endp == '/');

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	/* Cast is safe because max path < max int */
	len = (int)(endp - path + 1);
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#ifdef GIT_WIN32
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	/* Mimic unix behavior where '/.git' returns '/': 'C:/.git' will return
		'C:/' here */
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	if (len == 2 && LOOKS_LIKE_DRIVE_PREFIX(path)) {
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		len = 3;
		goto Exit;
	}
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	/* Similarly checks if we're dealing with a network computer name
		'//computername/.git' will return '//computername/' */

	if (looks_like_network_computer_name(path, len)) {
		len++;
		goto Exit;
	}

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#endif

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Exit:
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	result = len;

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	if (buffer != NULL && git_buf_set(buffer, path, len) < 0)
		return -1;
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	return result;
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}


char *git_path_dirname(const char *path)
{
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	git_buf buf = GIT_BUF_INIT;
	char *dirname;
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	git_path_dirname_r(&buf, path);
	dirname = git_buf_detach(&buf);
	git_buf_free(&buf); /* avoid memleak if error occurs */
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	return dirname;
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}

char *git_path_basename(const char *path)
{
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	git_buf buf = GIT_BUF_INIT;
	char *basename;
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	git_path_basename_r(&buf, path);
	basename = git_buf_detach(&buf);
	git_buf_free(&buf); /* avoid memleak if error occurs */
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	return basename;
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}

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size_t git_path_basename_offset(git_buf *buffer)
{
	ssize_t slash;

	if (!buffer || buffer->size <= 0)
		return 0;

	slash = git_buf_rfind_next(buffer, '/');

	if (slash >= 0 && buffer->ptr[slash] == '/')
		return (size_t)(slash + 1);

	return 0;
}
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const char *git_path_topdir(const char *path)
{
	size_t len;
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	ssize_t i;
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	assert(path);
	len = strlen(path);

	if (!len || path[len - 1] != '/')
		return NULL;

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	for (i = (ssize_t)len - 2; i >= 0; --i)
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		if (path[i] == '/')
			break;

	return &path[i + 1];
}

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int git_path_root(const char *path)
{
	int offset = 0;

	/* Does the root of the path look like a windows drive ? */
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	if (LOOKS_LIKE_DRIVE_PREFIX(path))
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		offset += 2;
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#ifdef GIT_WIN32
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	/* Are we dealing with a windows network path? */
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	else if ((path[0] == '/' && path[1] == '/' && path[2] != '/') ||
		(path[0] == '\\' && path[1] == '\\' && path[2] != '\\'))
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	{
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		offset += 2;
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		/* Skip the computer name segment */
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		while (path[offset] && path[offset] != '/' && path[offset] != '\\')
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			offset++;
	}
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#endif

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	if (path[offset] == '/' || path[offset] == '\\')
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		return offset;

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	return -1;	/* Not a real error - signals that path is not rooted */
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}

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void git_path_trim_slashes(git_buf *path)
{
	int ceiling = git_path_root(path->ptr) + 1;
	assert(ceiling >= 0);

	while (path->size > (size_t)ceiling) {
		if (path->ptr[path->size-1] != '/')
			break;

		path->ptr[path->size-1] = '\0';
		path->size--;
	}
}

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int git_path_join_unrooted(
	git_buf *path_out, const char *path, const char *base, ssize_t *root_at)
{
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	ssize_t root;
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	assert(path && path_out);

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	root = (ssize_t)git_path_root(path);
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	if (base != NULL && root < 0) {
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		if (git_buf_joinpath(path_out, base, path) < 0)
			return -1;
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		root = (ssize_t)strlen(base);
	} else {
		if (git_buf_sets(path_out, path) < 0)
			return -1;
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		if (root < 0)
			root = 0;
		else if (base)
			git_path_equal_or_prefixed(base, path, &root);
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	}

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	if (root_at)
		*root_at = root;

	return 0;
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}

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int git_path_prettify(git_buf *path_out, const char *path, const char *base)
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{
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	char buf[GIT_PATH_MAX];
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	assert(path && path_out);
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	/* construct path if needed */
	if (base != NULL && git_path_root(path) < 0) {
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		if (git_buf_joinpath(path_out, base, path) < 0)
			return -1;
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		path = path_out->ptr;
	}

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	if (p_realpath(path, buf) == NULL) {
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		/* giterr_set resets the errno when dealing with a GITERR_OS kind of error */
		int error = (errno == ENOENT || errno == ENOTDIR) ? GIT_ENOTFOUND : -1;
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		giterr_set(GITERR_OS, "Failed to resolve path '%s'", path);
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		git_buf_clear(path_out);
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		return error;
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	}
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	return git_buf_sets(path_out, buf);
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}

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int git_path_prettify_dir(git_buf *path_out, const char *path, const char *base)
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{
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	int error = git_path_prettify(path_out, path, base);
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	return (error < 0) ? error : git_path_to_dir(path_out);
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}
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int git_path_to_dir(git_buf *path)
{
	if (path->asize > 0 &&
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		git_buf_len(path) > 0 &&
		path->ptr[git_buf_len(path) - 1] != '/')
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		git_buf_putc(path, '/');
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	return git_buf_oom(path) ? -1 : 0;
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}
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void git_path_string_to_dir(char* path, size_t size)
{
	size_t end = strlen(path);

	if (end && path[end - 1] != '/' && end < size) {
		path[end] = '/';
		path[end + 1] = '\0';
	}
}

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int git__percent_decode(git_buf *decoded_out, const char *input)
{
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	int len, hi, lo, i;
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	assert(decoded_out && input);

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	len = (int)strlen(input);
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	git_buf_clear(decoded_out);

	for(i = 0; i < len; i++)
	{
		char c = input[i];

		if (c != '%')
			goto append;

		if (i >= len - 2)
			goto append;

		hi = git__fromhex(input[i + 1]);
		lo = git__fromhex(input[i + 2]);

		if (hi < 0 || lo < 0)
			goto append;

		c = (char)(hi << 4 | lo);
		i += 2;

append:
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		if (git_buf_putc(decoded_out, c) < 0)
			return -1;
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	}

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	return 0;
}

static int error_invalid_local_file_uri(const char *uri)
{
	giterr_set(GITERR_CONFIG, "'%s' is not a valid local file URI", uri);
	return -1;
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}
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static int local_file_url_prefixlen(const char *file_url)
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{
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	int len = -1;
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	if (git__prefixcmp(file_url, "file://") == 0) {
		if (file_url[7] == '/')
			len = 8;
		else if (git__prefixcmp(file_url + 7, "localhost/") == 0)
			len = 17;
	}
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	return len;
}
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bool git_path_is_local_file_url(const char *file_url)
{
	return (local_file_url_prefixlen(file_url) > 0);
}
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int git_path_fromurl(git_buf *local_path_out, const char *file_url)
{
	int offset;
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	assert(local_path_out && file_url);

	if ((offset = local_file_url_prefixlen(file_url)) < 0 ||
		file_url[offset] == '\0' || file_url[offset] == '/')
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		return error_invalid_local_file_uri(file_url);
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#ifndef GIT_WIN32
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	offset--;	/* A *nix absolute path starts with a forward slash */
#endif

	git_buf_clear(local_path_out);
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	return git__percent_decode(local_path_out, file_url + offset);
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}
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int git_path_walk_up(
	git_buf *path,
	const char *ceiling,
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	int (*cb)(void *data, const char *),
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	void *data)
{
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	int error = 0;
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	git_buf iter;
	ssize_t stop = 0, scan;
	char oldc = '\0';

	assert(path && cb);

	if (ceiling != NULL) {
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		if (git__prefixcmp(path->ptr, ceiling) == 0)
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			stop = (ssize_t)strlen(ceiling);
		else
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			stop = git_buf_len(path);
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	}
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	scan = git_buf_len(path);
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	/* empty path: yield only once */
	if (!scan) {
		error = cb(data, "");
		if (error)
			giterr_set_after_callback(error);
		return error;
	}

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	iter.ptr = path->ptr;
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	iter.size = git_buf_len(path);
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	iter.asize = path->asize;
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	while (scan >= stop) {
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		error = cb(data, iter.ptr);
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		iter.ptr[scan] = oldc;
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		if (error) {
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			giterr_set_after_callback(error);
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			break;
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		}
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		scan = git_buf_rfind_next(&iter, '/');
		if (scan >= 0) {
			scan++;
			oldc = iter.ptr[scan];
			iter.size = scan;
			iter.ptr[scan] = '\0';
		}
	}

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	if (scan >= 0)
		iter.ptr[scan] = oldc;
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	/* relative path: yield for the last component */
	if (!error && stop == 0 && iter.ptr[0] != '/') {
		error = cb(data, "");
		if (error)
			giterr_set_after_callback(error);
	}

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	return error;
}
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bool git_path_exists(const char *path)
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{
	assert(path);
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	return p_access(path, F_OK) == 0;
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}

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bool git_path_isdir(const char *path)
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{
	struct stat st;
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	if (p_stat(path, &st) < 0)
		return false;
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	return S_ISDIR(st.st_mode) != 0;
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}

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bool git_path_isfile(const char *path)
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{
	struct stat st;

	assert(path);
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	if (p_stat(path, &st) < 0)
		return false;
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	return S_ISREG(st.st_mode) != 0;
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}

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bool git_path_islink(const char *path)
{
	struct stat st;

	assert(path);
	if (p_lstat(path, &st) < 0)
		return false;

	return S_ISLNK(st.st_mode) != 0;
}

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#ifdef GIT_WIN32

bool git_path_is_empty_dir(const char *path)
{
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	git_win32_path filter_w;
	bool empty = false;

	if (git_win32__findfirstfile_filter(filter_w, path)) {
		WIN32_FIND_DATAW findData;
		HANDLE hFind = FindFirstFileW(filter_w, &findData);

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		/* FindFirstFile will fail if there are no children to the given
		 * path, which can happen if the given path is a file (and obviously
		 * has no children) or if the given path is an empty mount point.
		 * (Most directories have at least directory entries '.' and '..',
		 * but ridiculously another volume mounted in another drive letter's
		 * path space do not, and thus have nothing to enumerate.)  If
		 * FindFirstFile fails, check if this is a directory-like thing
		 * (a mount point).
		 */
		if (hFind == INVALID_HANDLE_VALUE)
			return git_path_isdir(path);

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		/* If the find handle was created successfully, then it's a directory */
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		empty = true;

		do {
			/* Allow the enumeration to return . and .. and still be considered
			 * empty. In the special case of drive roots (i.e. C:\) where . and
			 * .. do not occur, we can still consider the path to be an empty
			 * directory if there's nothing there. */
			if (!git_path_is_dot_or_dotdotW(findData.cFileName)) {
				empty = false;
				break;
			}
		} while (FindNextFileW(hFind, &findData));

		FindClose(hFind);
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	}
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	return empty;
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}

#else

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static int path_found_entry(void *payload, git_buf *path)
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{
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	GIT_UNUSED(payload);
	return !git_path_is_dot_or_dotdot(path->ptr);
}
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bool git_path_is_empty_dir(const char *path)
{
	int error;
	git_buf dir = GIT_BUF_INIT;
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	if (!git_path_isdir(path))
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		return false;

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	if ((error = git_buf_sets(&dir, path)) != 0)
		giterr_clear();
	else
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		error = git_path_direach(&dir, 0, path_found_entry, NULL);
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	git_buf_free(&dir);

	return !error;
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}
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#endif

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int git_path_set_error(int errno_value, const char *path, const char *action)
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{
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	switch (errno_value) {
	case ENOENT:
	case ENOTDIR:
		giterr_set(GITERR_OS, "Could not find '%s' to %s", path, action);
		return GIT_ENOTFOUND;

	case EINVAL:
	case ENAMETOOLONG:
		giterr_set(GITERR_OS, "Invalid path for filesystem '%s'", path);
		return GIT_EINVALIDSPEC;

	case EEXIST:
		giterr_set(GITERR_OS, "Failed %s - '%s' already exists", action, path);
		return GIT_EEXISTS;
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	default:
		giterr_set(GITERR_OS, "Could not %s '%s'", action, path);
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		return -1;
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	}
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}

int git_path_lstat(const char *path, struct stat *st)
{
	if (p_lstat(path, st) == 0)
		return 0;
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	return git_path_set_error(errno, path, "stat");
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}

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static bool _check_dir_contents(
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	git_buf *dir,
	const char *sub,
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	bool (*predicate)(const char *))
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{
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	bool result;
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	size_t dir_size = git_buf_len(dir);
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	size_t sub_size = strlen(sub);
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	size_t alloc_size;
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	/* leave base valid even if we could not make space for subdir */
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	if (GIT_ADD_SIZET_OVERFLOW(&alloc_size, dir_size, sub_size) ||
		GIT_ADD_SIZET_OVERFLOW(&alloc_size, alloc_size, 2) ||
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		git_buf_try_grow(dir, alloc_size, false) < 0)
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		return false;

	/* save excursion */
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	git_buf_joinpath(dir, dir->ptr, sub);

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	result = predicate(dir->ptr);
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	/* restore path */
	git_buf_truncate(dir, dir_size);
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	return result;
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}

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bool git_path_contains(git_buf *dir, const char *item)
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{
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	return _check_dir_contents(dir, item, &git_path_exists);
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}

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bool git_path_contains_dir(git_buf *base, const char *subdir)
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{
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	return _check_dir_contents(base, subdir, &git_path_isdir);
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}

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bool git_path_contains_file(git_buf *base, const char *file)
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{
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	return _check_dir_contents(base, file, &git_path_isfile);
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}

int git_path_find_dir(git_buf *dir, const char *path, const char *base)
{
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	int error = git_path_join_unrooted(dir, path, base, NULL);
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	if (!error) {
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		char buf[GIT_PATH_MAX];
		if (p_realpath(dir->ptr, buf) != NULL)
			error = git_buf_sets(dir, buf);
	}

	/* call dirname if this is not a directory */
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	if (!error) /* && git_path_isdir(dir->ptr) == false) */
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		error = (git_path_dirname_r(dir, dir->ptr) < 0) ? -1 : 0;
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	if (!error)
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		error = git_path_to_dir(dir);

	return error;
}

703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735
int git_path_resolve_relative(git_buf *path, size_t ceiling)
{
	char *base, *to, *from, *next;
	size_t len;

	if (!path || git_buf_oom(path))
		return -1;

	if (ceiling > path->size)
		ceiling = path->size;

	/* recognize drive prefixes, etc. that should not be backed over */
	if (ceiling == 0)
		ceiling = git_path_root(path->ptr) + 1;

	/* recognize URL prefixes that should not be backed over */
	if (ceiling == 0) {
		for (next = path->ptr; *next && git__isalpha(*next); ++next);
		if (next[0] == ':' && next[1] == '/' && next[2] == '/')
			ceiling = (next + 3) - path->ptr;
	}

	base = to = from = path->ptr + ceiling;

	while (*from) {
		for (next = from; *next && *next != '/'; ++next);

		len = next - from;

		if (len == 1 && from[0] == '.')
			/* do nothing with singleton dot */;

		else if (len == 2 && from[0] == '.' && from[1] == '.') {
736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762
			/* error out if trying to up one from a hard base */
			if (to == base && ceiling != 0) {
				giterr_set(GITERR_INVALID,
					"Cannot strip root component off url");
				return -1;
			}

			/* no more path segments to strip,
			 * use '../' as a new base path */
			if (to == base) {
				if (*next == '/')
					len++;

				if (to != from)
					memmove(to, from, len);

				to += len;
				/* this is now the base, can't back up from a
				 * relative prefix */
				base = to;
			} else {
				/* back up a path segment */
				while (to > base && to[-1] == '/') to--;
				while (to > base && to[-1] != '/') to--;
			}
		} else {
			if (*next == '/' && *from != '/')
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				len++;

			if (to != from)
				memmove(to, from, len);

			to += len;
		}

		from += len;

		while (*from == '/') from++;
	}

	*to = '\0';

	path->size = to - path->ptr;

	return 0;
}

int git_path_apply_relative(git_buf *target, const char *relpath)
{
	git_buf_joinpath(target, git_buf_cstr(target), relpath);
	return git_path_resolve_relative(target, 0);
}

789 790
int git_path_cmp(
	const char *name1, size_t len1, int isdir1,
791 792
	const char *name2, size_t len2, int isdir2,
	int (*compare)(const char *, const char *, size_t))
793
{
794
	unsigned char c1, c2;
795
	size_t len = len1 < len2 ? len1 : len2;
796 797
	int cmp;

798
	cmp = compare(name1, name2, len);
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	if (cmp)
		return cmp;

	c1 = name1[len];
	c2 = name2[len];

	if (c1 == '\0' && isdir1)
		c1 = '/';

	if (c2 == '\0' && isdir2)
		c2 = '/';

	return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0;
}

814 815 816
int git_path_make_relative(git_buf *path, const char *parent)
{
	const char *p, *q, *p_dirsep, *q_dirsep;
817
	size_t plen = path->size, newlen, alloclen, depth = 1, i, offset;
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	for (p_dirsep = p = path->ptr, q_dirsep = q = parent; *p && *q; p++, q++) {
		if (*p == '/' && *q == '/') {
			p_dirsep = p;
			q_dirsep = q;
		}
		else if (*p != *q)
			break;
	}

	/* need at least 1 common path segment */
	if ((p_dirsep == path->ptr || q_dirsep == parent) &&
		(*p_dirsep != '/' || *q_dirsep != '/')) {
		giterr_set(GITERR_INVALID,
			"%s is not a parent of %s", parent, path->ptr);
		return GIT_ENOTFOUND;
	}

	if (*p == '/' && !*q)
		p++;
	else if (!*p && *q == '/')
		q++;
	else if (!*p && !*q)
		return git_buf_clear(path), 0;
	else {
		p = p_dirsep + 1;
		q = q_dirsep + 1;
	}

	plen -= (p - path->ptr);

	if (!*q)
		return git_buf_set(path, p, plen);

	for (; (q = strchr(q, '/')) && *(q + 1); q++)
		depth++;

855 856 857 858
	GITERR_CHECK_ALLOC_MULTIPLY(&newlen, depth, 3);
	GITERR_CHECK_ALLOC_ADD(&newlen, newlen, plen);

	GITERR_CHECK_ALLOC_ADD(&alloclen, newlen, 1);
859

Erdur committed
860 861
	/* save the offset as we might realllocate the pointer */
	offset = p - path->ptr;
862
	if (git_buf_try_grow(path, alloclen, 1) < 0)
863
		return -1;
Erdur committed
864
	p = path->ptr + offset;
865 866 867 868 869 870 871 872 873 874

	memmove(path->ptr + (depth * 3), p, plen + 1);

	for (i = 0; i < depth; i++)
		memcpy(path->ptr + (i * 3), "../", 3);

	path->size = newlen;
	return 0;
}

875
bool git_path_has_non_ascii(const char *path, size_t pathlen)
876 877 878 879 880 881 882 883 884 885
{
	const uint8_t *scan = (const uint8_t *)path, *end;

	for (end = scan + pathlen; scan < end; ++scan)
		if (*scan & 0x80)
			return true;

	return false;
}

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#ifdef GIT_USE_ICONV

int git_path_iconv_init_precompose(git_path_iconv_t *ic)
{
	git_buf_init(&ic->buf, 0);
	ic->map = iconv_open(GIT_PATH_REPO_ENCODING, GIT_PATH_NATIVE_ENCODING);
	return 0;
}

void git_path_iconv_clear(git_path_iconv_t *ic)
{
	if (ic) {
		if (ic->map != (iconv_t)-1)
			iconv_close(ic->map);
		git_buf_free(&ic->buf);
	}
}

904
int git_path_iconv(git_path_iconv_t *ic, const char **in, size_t *inlen)
905
{
906
	char *nfd = (char*)*in, *nfc;
907
	size_t nfdlen = *inlen, nfclen, wantlen = nfdlen, alloclen, rv;
908 909
	int retry = 1;

910 911
	if (!ic || ic->map == (iconv_t)-1 ||
		!git_path_has_non_ascii(*in, *inlen))
912 913
		return 0;

Russell Belfer committed
914
	git_buf_clear(&ic->buf);
915

916
	while (1) {
917 918
		GITERR_CHECK_ALLOC_ADD(&alloclen, wantlen, 1);
		if (git_buf_grow(&ic->buf, alloclen) < 0)
919 920
			return -1;

921 922
		nfc    = ic->buf.ptr   + ic->buf.size;
		nfclen = ic->buf.asize - ic->buf.size;
923

924
		rv = iconv(ic->map, &nfd, &nfdlen, &nfc, &nfclen);
925

926
		ic->buf.size = (nfc - ic->buf.ptr);
927 928 929 930

		if (rv != (size_t)-1)
			break;

931 932 933
		/* if we cannot convert the data (probably because iconv thinks
		 * it is not valid UTF-8 source data), then use original data
		 */
934
		if (errno != E2BIG)
935
			return 0;
936 937 938 939

		/* make space for 2x the remaining data to be converted
		 * (with per retry overhead to avoid infinite loops)
		 */
940
		wantlen = ic->buf.size + max(nfclen, nfdlen) * 2 + (size_t)(retry * 4);
941 942

		if (retry++ > 4)
943
			goto fail;
944 945
	}

946
	ic->buf.ptr[ic->buf.size] = '\0';
947

948 949
	*in    = ic->buf.ptr;
	*inlen = ic->buf.size;
950 951

	return 0;
952 953 954 955

fail:
	giterr_set(GITERR_OS, "Unable to convert unicode path data");
	return -1;
956
}
957

958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015
static const char *nfc_file = "\xC3\x85\x73\x74\x72\xC3\xB6\x6D.XXXXXX";
static const char *nfd_file = "\x41\xCC\x8A\x73\x74\x72\x6F\xCC\x88\x6D.XXXXXX";

/* Check if the platform is decomposing unicode data for us.  We will
 * emulate core Git and prefer to use precomposed unicode data internally
 * on these platforms, composing the decomposed unicode on the fly.
 *
 * This mainly happens on the Mac where HDFS stores filenames as
 * decomposed unicode.  Even on VFAT and SAMBA file systems, the Mac will
 * return decomposed unicode from readdir() even when the actual
 * filesystem is storing precomposed unicode.
 */
bool git_path_does_fs_decompose_unicode(const char *root)
{
	git_buf path = GIT_BUF_INIT;
	int fd;
	bool found_decomposed = false;
	char tmp[6];

	/* Create a file using a precomposed path and then try to find it
	 * using the decomposed name.  If the lookup fails, then we will mark
	 * that we should precompose unicode for this repository.
	 */
	if (git_buf_joinpath(&path, root, nfc_file) < 0 ||
		(fd = p_mkstemp(path.ptr)) < 0)
		goto done;
	p_close(fd);

	/* record trailing digits generated by mkstemp */
	memcpy(tmp, path.ptr + path.size - sizeof(tmp), sizeof(tmp));

	/* try to look up as NFD path */
	if (git_buf_joinpath(&path, root, nfd_file) < 0)
		goto done;
	memcpy(path.ptr + path.size - sizeof(tmp), tmp, sizeof(tmp));

	found_decomposed = git_path_exists(path.ptr);

	/* remove temporary file (using original precomposed path) */
	if (git_buf_joinpath(&path, root, nfc_file) < 0)
		goto done;
	memcpy(path.ptr + path.size - sizeof(tmp), tmp, sizeof(tmp));

	(void)p_unlink(path.ptr);

done:
	git_buf_free(&path);
	return found_decomposed;
}

#else

bool git_path_does_fs_decompose_unicode(const char *root)
{
	GIT_UNUSED(root);
	return false;
}

1016 1017 1018 1019 1020 1021 1022 1023
#endif

#if defined(__sun) || defined(__GNU__)
typedef char path_dirent_data[sizeof(struct dirent) + FILENAME_MAX + 1];
#else
typedef struct dirent path_dirent_data;
#endif

1024 1025
int git_path_direach(
	git_buf *path,
1026
	uint32_t flags,
1027 1028 1029
	int (*fn)(void *, git_buf *),
	void *arg)
{
1030
	int error = 0;
1031 1032
	ssize_t wd_len;
	DIR *dir;
1033
	struct dirent *de;
1034 1035

#ifdef GIT_USE_ICONV
1036
	git_path_iconv_t ic = GIT_PATH_ICONV_INIT;
1037
#endif
1038

1039 1040
	GIT_UNUSED(flags);

1041
	if (git_path_to_dir(path) < 0)
1042
		return -1;
1043

nulltoken committed
1044
	wd_len = git_buf_len(path);
1045

1046 1047
	if ((dir = opendir(path->ptr)) == NULL) {
		giterr_set(GITERR_OS, "Failed to open directory '%s'", path->ptr);
1048 1049 1050
		if (errno == ENOENT)
			return GIT_ENOTFOUND;

1051 1052
		return -1;
	}
1053

1054
#ifdef GIT_USE_ICONV
1055
	if ((flags & GIT_PATH_DIR_PRECOMPOSE_UNICODE) != 0)
1056
		(void)git_path_iconv_init_precompose(&ic);
1057
#endif
1058

1059
	while ((de = readdir(dir)) != NULL) {
1060
		const char *de_path = de->d_name;
1061
		size_t de_len = strlen(de_path);
1062

1063
		if (git_path_is_dot_or_dotdot(de_path))
1064 1065
			continue;

1066 1067 1068 1069
#ifdef GIT_USE_ICONV
		if ((error = git_path_iconv(&ic, &de_path, &de_len)) < 0)
			break;
#endif
1070

1071
		if ((error = git_buf_put(path, de_path, de_len)) < 0)
1072 1073
			break;

1074
		giterr_clear();
1075
		error = fn(arg, path);
1076 1077 1078

		git_buf_truncate(path, wd_len); /* restore path */

1079
		/* Only set our own error if the callback did not set one already */
1080 1081 1082 1083
		if (error != 0) {
			if (!giterr_last())
				giterr_set_after_callback(error);

1084
			break;
1085
		}
1086 1087 1088
	}

	closedir(dir);
1089 1090

#ifdef GIT_USE_ICONV
1091
	git_path_iconv_clear(&ic);
1092
#endif
1093 1094

	return error;
1095
}
1096

1097 1098 1099
#if defined(GIT_WIN32) && !defined(__MINGW32__)

/* Using _FIND_FIRST_EX_LARGE_FETCH may increase performance in Windows 7
1100
 * and better.
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113
 */
#ifndef FIND_FIRST_EX_LARGE_FETCH
# define FIND_FIRST_EX_LARGE_FETCH 2
#endif

int git_path_diriter_init(
	git_path_diriter *diriter,
	const char *path,
	unsigned int flags)
{
	git_win32_path path_filter;
	git_buf hack = {0};

1114 1115 1116 1117
	static int is_win7_or_later = -1;
	if (is_win7_or_later < 0)
		is_win7_or_later = git_has_win32_version(6, 1, 0);

1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140
	assert(diriter && path);

	memset(diriter, 0, sizeof(git_path_diriter));
	diriter->handle = INVALID_HANDLE_VALUE;

	if (git_buf_puts(&diriter->path_utf8, path) < 0)
		return -1;

	git_path_trim_slashes(&diriter->path_utf8);

	if (diriter->path_utf8.size == 0) {
		giterr_set(GITERR_FILESYSTEM, "Could not open directory '%s'", path);
		return -1;
	}

	if ((diriter->parent_len = git_win32_path_from_utf8(diriter->path, diriter->path_utf8.ptr)) < 0 ||
			!git_win32__findfirstfile_filter(path_filter, diriter->path_utf8.ptr)) {
		giterr_set(GITERR_OS, "Could not parse the directory path '%s'", path);
		return -1;
	}

	diriter->handle = FindFirstFileExW(
		path_filter,
1141
		is_win7_or_later ? FindExInfoBasic : FindExInfoStandard,
1142 1143 1144
		&diriter->current,
		FindExSearchNameMatch,
		NULL,
1145
		is_win7_or_later ? FIND_FIRST_EX_LARGE_FETCH : 0);
1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156

	if (diriter->handle == INVALID_HANDLE_VALUE) {
		giterr_set(GITERR_OS, "Could not open directory '%s'", path);
		return -1;
	}

	diriter->parent_utf8_len = diriter->path_utf8.size;
	diriter->flags = flags;
	return 0;
}

1157
static int diriter_update_paths(git_path_diriter *diriter)
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179
{
	size_t filename_len, path_len;

	filename_len = wcslen(diriter->current.cFileName);

	if (GIT_ADD_SIZET_OVERFLOW(&path_len, diriter->parent_len, filename_len) ||
		GIT_ADD_SIZET_OVERFLOW(&path_len, path_len, 2))
		return -1;

	if (path_len > GIT_WIN_PATH_UTF16) {
		giterr_set(GITERR_FILESYSTEM,
			"invalid path '%.*ls\\%ls' (path too long)",
			diriter->parent_len, diriter->path, diriter->current.cFileName);
		return -1;
	}

	diriter->path[diriter->parent_len] = L'\\';
	memcpy(&diriter->path[diriter->parent_len+1],
		diriter->current.cFileName, filename_len * sizeof(wchar_t));
	diriter->path[path_len-1] = L'\0';

	git_buf_truncate(&diriter->path_utf8, diriter->parent_utf8_len);
1180 1181 1182 1183 1184

	if (diriter->parent_utf8_len > 0 &&
		diriter->path_utf8.ptr[diriter->parent_utf8_len-1] != '/')
		git_buf_putc(&diriter->path_utf8, '/');

1185
	git_buf_put_w(&diriter->path_utf8, diriter->current.cFileName, filename_len);
1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206

	if (git_buf_oom(&diriter->path_utf8))
		return -1;

	return 0;
}

int git_path_diriter_next(git_path_diriter *diriter)
{
	bool skip_dot = !(diriter->flags & GIT_PATH_DIR_INCLUDE_DOT_AND_DOTDOT);

	do {
		/* Our first time through, we already have the data from
		 * FindFirstFileW.  Use it, otherwise get the next file.
		 */
		if (!diriter->needs_next)
			diriter->needs_next = 1;
		else if (!FindNextFileW(diriter->handle, &diriter->current))
			return GIT_ITEROVER;
	} while (skip_dot && git_path_is_dot_or_dotdotW(diriter->current.cFileName));

1207
	if (diriter_update_paths(diriter) < 0)
1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
		return -1;

	return 0;
}

int git_path_diriter_filename(
	const char **out,
	size_t *out_len,
	git_path_diriter *diriter)
{
	assert(out && out_len && diriter);

	assert(diriter->path_utf8.size > diriter->parent_utf8_len);

	*out = &diriter->path_utf8.ptr[diriter->parent_utf8_len+1];
	*out_len = diriter->path_utf8.size - diriter->parent_utf8_len - 1;
	return 0;
}

int git_path_diriter_fullpath(
	const char **out,
	size_t *out_len,
	git_path_diriter *diriter)
{
	assert(out && out_len && diriter);

	*out = diriter->path_utf8.ptr;
	*out_len = diriter->path_utf8.size;
	return 0;
}

int git_path_diriter_stat(struct stat *out, git_path_diriter *diriter)
{
	assert(out && diriter);

	return git_win32__file_attribute_to_stat(out,
		(WIN32_FILE_ATTRIBUTE_DATA *)&diriter->current,
		diriter->path);
}

void git_path_diriter_free(git_path_diriter *diriter)
{
	if (diriter == NULL)
		return;

1253 1254
	git_buf_free(&diriter->path_utf8);

1255 1256 1257 1258 1259 1260 1261 1262
	if (diriter->handle != INVALID_HANDLE_VALUE) {
		FindClose(diriter->handle);
		diriter->handle = INVALID_HANDLE_VALUE;
	}
}

#else

1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
int git_path_diriter_init(
	git_path_diriter *diriter,
	const char *path,
	unsigned int flags)
{
	assert(diriter && path);

	memset(diriter, 0, sizeof(git_path_diriter));

	if (git_buf_puts(&diriter->path, path) < 0)
		return -1;

	git_path_trim_slashes(&diriter->path);

1277 1278 1279 1280 1281
	if (diriter->path.size == 0) {
		giterr_set(GITERR_FILESYSTEM, "Could not open directory '%s'", path);
		return -1;
	}

1282 1283 1284 1285 1286 1287 1288 1289 1290
	if ((diriter->dir = opendir(diriter->path.ptr)) == NULL) {
		git_buf_free(&diriter->path);

		giterr_set(GITERR_OS, "Failed to open directory '%s'", path);
		return -1;
	}

#ifdef GIT_USE_ICONV
	if ((flags & GIT_PATH_DIR_PRECOMPOSE_UNICODE) != 0)
1291
		(void)git_path_iconv_init_precompose(&diriter->ic);
1292 1293 1294 1295 1296 1297 1298 1299
#endif

	diriter->parent_len = diriter->path.size;
	diriter->flags = flags;

	return 0;
}

1300
int git_path_diriter_next(git_path_diriter *diriter)
1301 1302 1303 1304 1305 1306 1307
{
	struct dirent *de;
	const char *filename;
	size_t filename_len;
	bool skip_dot = !(diriter->flags & GIT_PATH_DIR_INCLUDE_DOT_AND_DOTDOT);
	int error = 0;

1308
	assert(diriter);
1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326

	errno = 0;

	do {
		if ((de = readdir(diriter->dir)) == NULL) {
			if (!errno)
				return GIT_ITEROVER;

			giterr_set(GITERR_OS,
				"Could not read directory '%s'", diriter->path);
			return -1;
		}
	} while (skip_dot && git_path_is_dot_or_dotdot(de->d_name));

	filename = de->d_name;
	filename_len = strlen(filename);

#ifdef GIT_USE_ICONV
1327
	if ((diriter->flags & GIT_PATH_DIR_PRECOMPOSE_UNICODE) != 0 &&
1328
		(error = git_path_iconv(&diriter->ic, &filename, &filename_len)) < 0)
1329 1330 1331 1332
		return error;
#endif

	git_buf_truncate(&diriter->path, diriter->parent_len);
1333 1334 1335 1336 1337

	if (diriter->parent_len > 0 &&
		diriter->path.ptr[diriter->parent_len-1] != '/')
		git_buf_putc(&diriter->path, '/');

1338 1339 1340 1341 1342 1343 1344 1345
	git_buf_put(&diriter->path, filename, filename_len);

	if (git_buf_oom(&diriter->path))
		return -1;

	return error;
}

1346 1347 1348 1349 1350 1351 1352
int git_path_diriter_filename(
	const char **out,
	size_t *out_len,
	git_path_diriter *diriter)
{
	assert(out && out_len && diriter);

1353 1354
	assert(diriter->path.size > diriter->parent_len);

1355 1356 1357 1358 1359
	*out = &diriter->path.ptr[diriter->parent_len+1];
	*out_len = diriter->path.size - diriter->parent_len - 1;
	return 0;
}

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int git_path_diriter_fullpath(
	const char **out,
	size_t *out_len,
	git_path_diriter *diriter)
{
	assert(out && out_len && diriter);

	*out = diriter->path.ptr;
	*out_len = diriter->path.size;
	return 0;
}

int git_path_diriter_stat(struct stat *out, git_path_diriter *diriter)
{
	assert(out && diriter);

	return git_path_lstat(diriter->path.ptr, out);
}

void git_path_diriter_free(git_path_diriter *diriter)
{
	if (diriter == NULL)
		return;

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	if (diriter->dir) {
		closedir(diriter->dir);
		diriter->dir = NULL;
	}
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#ifdef GIT_USE_ICONV
	git_path_iconv_clear(&diriter->ic);
#endif

	git_buf_free(&diriter->path);
}

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#endif

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int git_path_dirload(
	git_vector *contents,
	const char *path,
	size_t prefix_len,
1402
	uint32_t flags)
1403
{
1404
	git_path_diriter iter = GIT_PATH_DIRITER_INIT;
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	const char *name;
	size_t name_len;
	char *dup;
	int error;

	assert(contents && path);

	if ((error = git_path_diriter_init(&iter, path, flags)) < 0)
		return error;

1415
	while ((error = git_path_diriter_next(&iter)) == 0) {
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		if ((error = git_path_diriter_fullpath(&name, &name_len, &iter)) < 0)
			break;

		assert(name_len > prefix_len);

		dup = git__strndup(name + prefix_len, name_len - prefix_len);
		GITERR_CHECK_ALLOC(dup);

		if ((error = git_vector_insert(contents, dup)) < 0)
			break;
	}

	if (error == GIT_ITEROVER)
		error = 0;

	git_path_diriter_free(&iter);
	return error;
}

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int git_path_from_url_or_path(git_buf *local_path_out, const char *url_or_path)
{
1437 1438 1439 1440
	if (git_path_is_local_file_url(url_or_path))
		return git_path_fromurl(local_path_out, url_or_path);
	else
		return git_buf_sets(local_path_out, url_or_path);
1441
}
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/* Reject paths like AUX or COM1, or those versions that end in a dot or
 * colon.  ("AUX." or "AUX:")
 */
GIT_INLINE(bool) verify_dospath(
	const char *component,
	size_t len,
	const char dospath[3],
	bool trailing_num)
{
	size_t last = trailing_num ? 4 : 3;

	if (len < last || git__strncasecmp(component, dospath, 3) != 0)
		return true;

1457
	if (trailing_num && (component[3] < '1' || component[3] > '9'))
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		return true;

	return (len > last &&
		component[last] != '.' &&
		component[last] != ':');
}

1465
static int32_t next_hfs_char(const char **in, size_t *len)
1466
{
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	while (*len) {
		int32_t codepoint;
		int cp_len = git__utf8_iterate((const uint8_t *)(*in), (int)(*len), &codepoint);
		if (cp_len < 0)
			return -1;
1472

1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494
		(*in) += cp_len;
		(*len) -= cp_len;

		/* these code points are ignored completely */
		switch (codepoint) {
		case 0x200c: /* ZERO WIDTH NON-JOINER */
		case 0x200d: /* ZERO WIDTH JOINER */
		case 0x200e: /* LEFT-TO-RIGHT MARK */
		case 0x200f: /* RIGHT-TO-LEFT MARK */
		case 0x202a: /* LEFT-TO-RIGHT EMBEDDING */
		case 0x202b: /* RIGHT-TO-LEFT EMBEDDING */
		case 0x202c: /* POP DIRECTIONAL FORMATTING */
		case 0x202d: /* LEFT-TO-RIGHT OVERRIDE */
		case 0x202e: /* RIGHT-TO-LEFT OVERRIDE */
		case 0x206a: /* INHIBIT SYMMETRIC SWAPPING */
		case 0x206b: /* ACTIVATE SYMMETRIC SWAPPING */
		case 0x206c: /* INHIBIT ARABIC FORM SHAPING */
		case 0x206d: /* ACTIVATE ARABIC FORM SHAPING */
		case 0x206e: /* NATIONAL DIGIT SHAPES */
		case 0x206f: /* NOMINAL DIGIT SHAPES */
		case 0xfeff: /* ZERO WIDTH NO-BREAK SPACE */
			continue;
1495 1496
		}

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		/* fold into lowercase -- this will only fold characters in
		 * the ASCII range, which is perfectly fine, because the
		 * git folder name can only be composed of ascii characters
		 */
1501
		return git__tolower(codepoint);
1502
	}
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	return 0; /* NULL byte -- end of string */
}

static bool verify_dotgit_hfs(const char *path, size_t len)
{
	if (next_hfs_char(&path, &len) != '.' ||
		next_hfs_char(&path, &len) != 'g' ||
		next_hfs_char(&path, &len) != 'i' ||
		next_hfs_char(&path, &len) != 't' ||
		next_hfs_char(&path, &len) != 0)
		return true;
1514

1515
	return false;
1516 1517
}

1518 1519
GIT_INLINE(bool) verify_dotgit_ntfs(git_repository *repo, const char *path, size_t len)
{
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	git_buf *reserved = git_repository__reserved_names_win32;
	size_t reserved_len = git_repository__reserved_names_win32_len;
	size_t start = 0, i;

	if (repo)
		git_repository__reserved_names(&reserved, &reserved_len, repo, true);

	for (i = 0; i < reserved_len; i++) {
		git_buf *r = &reserved[i];

		if (len >= r->size &&
			strncasecmp(path, r->ptr, r->size) == 0) {
			start = r->size;
			break;
		}
	}

	if (!start)
1538 1539
		return true;

1540
	/* Reject paths like ".git\" */
1541 1542 1543
	if (path[start] == '\\')
		return false;

1544
	/* Reject paths like '.git ' or '.git.' */
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	for (i = start; i < len; i++) {
		if (path[i] != ' ' && path[i] != '.')
			return true;
	}

	return false;
}

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GIT_INLINE(bool) verify_char(unsigned char c, unsigned int flags)
{
	if ((flags & GIT_PATH_REJECT_BACKSLASH) && c == '\\')
		return false;

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	if ((flags & GIT_PATH_REJECT_SLASH) && c == '/')
		return false;

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	if (flags & GIT_PATH_REJECT_NT_CHARS) {
		if (c < 32)
			return false;

		switch (c) {
		case '<':
		case '>':
		case ':':
		case '"':
		case '|':
		case '?':
		case '*':
			return false;
		}
	}

	return true;
}

/*
 * We fundamentally don't like some paths when dealing with user-inputted
 * strings (in checkout or ref names): we don't want dot or dot-dot
 * anywhere, we want to avoid writing weird paths on Windows that can't
 * be handled by tools that use the non-\\?\ APIs, we don't want slashes
 * or double slashes at the end of paths that can make them ambiguous.
 *
 * For checkout, we don't want to recurse into ".git" either.
 */
static bool verify_component(
	git_repository *repo,
	const char *component,
	size_t len,
	unsigned int flags)
{
	if (len == 0)
		return false;

	if ((flags & GIT_PATH_REJECT_TRAVERSAL) &&
		len == 1 && component[0] == '.')
		return false;

	if ((flags & GIT_PATH_REJECT_TRAVERSAL) &&
		len == 2 && component[0] == '.' && component[1] == '.')
		return false;

	if ((flags & GIT_PATH_REJECT_TRAILING_DOT) && component[len-1] == '.')
		return false;

	if ((flags & GIT_PATH_REJECT_TRAILING_SPACE) && component[len-1] == ' ')
		return false;

	if ((flags & GIT_PATH_REJECT_TRAILING_COLON) && component[len-1] == ':')
		return false;

	if (flags & GIT_PATH_REJECT_DOS_PATHS) {
		if (!verify_dospath(component, len, "CON", false) ||
			!verify_dospath(component, len, "PRN", false) ||
			!verify_dospath(component, len, "AUX", false) ||
			!verify_dospath(component, len, "NUL", false) ||
			!verify_dospath(component, len, "COM", true)  ||
			!verify_dospath(component, len, "LPT", true))
			return false;
	}

1625 1626 1627 1628
	if (flags & GIT_PATH_REJECT_DOT_GIT_HFS &&
		!verify_dotgit_hfs(component, len))
		return false;

1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642
	if (flags & GIT_PATH_REJECT_DOT_GIT_NTFS &&
		!verify_dotgit_ntfs(repo, component, len))
		return false;

	if ((flags & GIT_PATH_REJECT_DOT_GIT_HFS) == 0 &&
		(flags & GIT_PATH_REJECT_DOT_GIT_NTFS) == 0 &&
		(flags & GIT_PATH_REJECT_DOT_GIT) &&
		len == 4 &&
		component[0] == '.' &&
		(component[1] == 'g' || component[1] == 'G') &&
		(component[2] == 'i' || component[2] == 'I') &&
		(component[3] == 't' || component[3] == 'T'))
		return false;

1643 1644 1645
	return true;
}

1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672
GIT_INLINE(unsigned int) dotgit_flags(
	git_repository *repo,
	unsigned int flags)
{
	int protectHFS = 0, protectNTFS = 0;

#ifdef __APPLE__
	protectHFS = 1;
#endif

#ifdef GIT_WIN32
	protectNTFS = 1;
#endif

	if (repo && !protectHFS)
		git_repository__cvar(&protectHFS, repo, GIT_CVAR_PROTECTHFS);
	if (protectHFS)
		flags |= GIT_PATH_REJECT_DOT_GIT_HFS;

	if (repo && !protectNTFS)
		git_repository__cvar(&protectNTFS, repo, GIT_CVAR_PROTECTNTFS);
	if (protectNTFS)
		flags |= GIT_PATH_REJECT_DOT_GIT_NTFS;

	return flags;
}

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bool git_path_isvalid(
	git_repository *repo,
	const char *path,
	unsigned int flags)
{
	const char *start, *c;

1680 1681 1682 1683
	/* Upgrade the ".git" checks based on platform */
	if ((flags & GIT_PATH_REJECT_DOT_GIT))
		flags = dotgit_flags(repo, flags);

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	for (start = c = path; *c; c++) {
		if (!verify_char(*c, flags))
			return false;

		if (*c == '/') {
			if (!verify_component(repo, start, (c - start), flags))
				return false;

			start = c+1;
		}
	}

	return verify_component(repo, start, (c - start), flags);
}
1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713

int git_path_normalize_slashes(git_buf *out, const char *path)
{
	int error;
	char *p;

	if ((error = git_buf_puts(out, path)) < 0)
		return error;

	for (p = out->ptr; *p; p++) {
		if (*p == '\\')
			*p = '/';
	}

	return 0;
}