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Shawn O. Pearce 2f4038a 





Shawn O. Pearce 556cfa3 

Jeff King 638794c 
Shawn O. Pearce 2f4038a 



Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 556cfa3 



















Jeff King 638794c 

Shawn O. Pearce 556cfa3 



















tarm 3548701 
Shawn O. Pearce 2f4038a 

























Shawn O. Pearce 4a5328d 
Shawn O. Pearce 2f4038a 





























tarm 3548701 
Shawn O. Pearce 2f4038a 














tarm 3548701 
Shawn O. Pearce 556cfa3 














Shawn O. Pearce 5abb013 





Shawn O. Pearce 2f4038a 







Shawn O. Pearce 92815b3 
Shawn O. Pearce 2f4038a 












Shawn O. Pearce 4a5328d 
Shawn O. Pearce 2f4038a 



Shawn O. Pearce 4a5328d 
Shawn O. Pearce 2f4038a 












Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 92815b3 
Shawn O. Pearce 2f4038a 



Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 92815b3 
Shawn O. Pearce 2f4038a 



Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 92815b3 
Shawn O. Pearce 2f4038a 



Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 92815b3 
Shawn O. Pearce 2f4038a 

Shawn O. Pearce 556cfa3 

Shawn O. Pearce 5abb013 

Shawn O. Pearce 556cfa3 


Shawn O. Pearce 5abb013 











Shawn O. Pearce 556cfa3 































































































































Shawn O. Pearce 2f4038a 



















Shawn O. Pearce 556cfa3 
Shawn O. Pearce 2f4038a 


Shawn O. Pearce 556cfa3 


















Shawn O. Pearce 5abb013 
Shawn O. Pearce 556cfa3 


Shawn O. Pearce 2f4038a 









Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 

















Shawn O. Pearce 556cfa3 









































Shawn O. Pearce 2f4038a 

Shawn O. Pearce 5856b5f 
Shawn O. Pearce 2f4038a 
Shawn O. Pearce 5856b5f 




Junio C Hamano 7626550 

Shawn O. Pearce 5856b5f 

Shawn O. Pearce 2f4038a 

Mark Lodato 917adc0 









Shawn O. Pearce 34b6cb8 

Mark Lodato 917adc0 
Shawn O. Pearce 34b6cb8 



Mark Lodato 917adc0 








Shawn O. Pearce 2f4038a 











Shawn O. Pearce 556cfa3 



Shawn O. Pearce 2f4038a 




Mark Lodato 917adc0 
Shawn O. Pearce 2f4038a 










Mark Lodato 917adc0 
Shawn O. Pearce 2f4038a 








tarm 48aec1b 
Shawn O. Pearce 2f4038a 












tarm 48aec1b 
Shawn O. Pearce 2f4038a 
tarm 48aec1b 

Shawn O. Pearce 2f4038a 











tarm 8b2bd7c 


Shawn O. Pearce 2f4038a 
Shawn O. Pearce 5abb013 
Shawn O. Pearce 2f4038a 

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#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
#include "object.h"
#include "tag.h"
#include "exec_cmd.h"
#include "run-command.h"
#include "string-list.h"
#include "url.h"

static const char content_type[] = "Content-Type";
static const char content_length[] = "Content-Length";
static const char last_modified[] = "Last-Modified";
static int getanyfile = 1;

static struct string_list *query_params;

struct rpc_service {
	const char *name;
	const char *config_name;
	signed enabled : 2;
};

static struct rpc_service rpc_service[] = {
	{ "upload-pack", "uploadpack", 1 },
	{ "receive-pack", "receivepack", -1 },
};

static struct string_list *get_parameters(void)
{
	if (!query_params) {
		const char *query = getenv("QUERY_STRING");

		query_params = xcalloc(1, sizeof(*query_params));
		while (query && *query) {
			char *name = url_decode_parameter_name(&query);
			char *value = url_decode_parameter_value(&query);
			struct string_list_item *i;

			i = string_list_lookup(name, query_params);
			if (!i)
				i = string_list_insert(name, query_params);
			else
				free(i->util);
			i->util = value;
		}
	}
	return query_params;
}

static const char *get_parameter(const char *name)
{
	struct string_list_item *i;
	i = string_list_lookup(name, get_parameters());
	return i ? i->util : NULL;
}

__attribute__((format (printf, 2, 3)))
static void format_write(int fd, const char *fmt, ...)
{
	static char buffer[1024];

	va_list args;
	unsigned n;

	va_start(args, fmt);
	n = vsnprintf(buffer, sizeof(buffer), fmt, args);
	va_end(args);
	if (n >= sizeof(buffer))
		die("protocol error: impossibly long line");

	safe_write(fd, buffer, n);
}

static void http_status(unsigned code, const char *msg)
{
	format_write(1, "Status: %u %s\r\n", code, msg);
}

static void hdr_str(const char *name, const char *value)
{
	format_write(1, "%s: %s\r\n", name, value);
}

static void hdr_int(const char *name, uintmax_t value)
{
	format_write(1, "%s: %" PRIuMAX "\r\n", name, value);
}

static void hdr_date(const char *name, unsigned long when)
{
	const char *value = show_date(when, 0, DATE_RFC2822);
	hdr_str(name, value);
}

static void hdr_nocache(void)
{
	hdr_str("Expires", "Fri, 01 Jan 1980 00:00:00 GMT");
	hdr_str("Pragma", "no-cache");
	hdr_str("Cache-Control", "no-cache, max-age=0, must-revalidate");
}

static void hdr_cache_forever(void)
{
	unsigned long now = time(NULL);
	hdr_date("Date", now);
	hdr_date("Expires", now + 31536000);
	hdr_str("Cache-Control", "public, max-age=31536000");
}

static void end_headers(void)
{
	safe_write(1, "\r\n", 2);
}

__attribute__((format (printf, 1, 2)))
static NORETURN void not_found(const char *err, ...)
{
	va_list params;

	http_status(404, "Not Found");
	hdr_nocache();
	end_headers();

	va_start(params, err);
	if (err && *err)
		vfprintf(stderr, err, params);
	va_end(params);
	exit(0);
}

__attribute__((format (printf, 1, 2)))
static NORETURN void forbidden(const char *err, ...)
{
	va_list params;

	http_status(403, "Forbidden");
	hdr_nocache();
	end_headers();

	va_start(params, err);
	if (err && *err)
		vfprintf(stderr, err, params);
	va_end(params);
	exit(0);
}

static void select_getanyfile(void)
{
	if (!getanyfile)
		forbidden("Unsupported service: getanyfile");
}

static void send_strbuf(const char *type, struct strbuf *buf)
{
	hdr_int(content_length, buf->len);
	hdr_str(content_type, type);
	end_headers();
	safe_write(1, buf->buf, buf->len);
}

static void send_local_file(const char *the_type, const char *name)
{
	const char *p = git_path("%s", name);
	size_t buf_alloc = 8192;
	char *buf = xmalloc(buf_alloc);
	int fd;
	struct stat sb;

	fd = open(p, O_RDONLY);
	if (fd < 0)
		not_found("Cannot open '%s': %s", p, strerror(errno));
	if (fstat(fd, &sb) < 0)
		die_errno("Cannot stat '%s'", p);

	hdr_int(content_length, sb.st_size);
	hdr_str(content_type, the_type);
	hdr_date(last_modified, sb.st_mtime);
	end_headers();

	for (;;) {
		ssize_t n = xread(fd, buf, buf_alloc);
		if (n < 0)
			die_errno("Cannot read '%s'", p);
		if (!n)
			break;
		safe_write(1, buf, n);
	}
	close(fd);
	free(buf);
}

static void get_text_file(char *name)
{
	select_getanyfile();
	hdr_nocache();
	send_local_file("text/plain", name);
}

static void get_loose_object(char *name)
{
	select_getanyfile();
	hdr_cache_forever();
	send_local_file("application/x-git-loose-object", name);
}

static void get_pack_file(char *name)
{
	select_getanyfile();
	hdr_cache_forever();
	send_local_file("application/x-git-packed-objects", name);
}

static void get_idx_file(char *name)
{
	select_getanyfile();
	hdr_cache_forever();
	send_local_file("application/x-git-packed-objects-toc", name);
}

static int http_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "http.getanyfile")) {
		getanyfile = git_config_bool(var, value);
		return 0;
	}

	if (!prefixcmp(var, "http.")) {
		int i;

		for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
			struct rpc_service *svc = &rpc_service[i];
			if (!strcmp(var + 5, svc->config_name)) {
				svc->enabled = git_config_bool(var, value);
				return 0;
			}
		}
	}

	/* we are not interested in parsing any other configuration here */
	return 0;
}

static struct rpc_service *select_service(const char *name)
{
	struct rpc_service *svc = NULL;
	int i;

	if (prefixcmp(name, "git-"))
		forbidden("Unsupported service: '%s'", name);

	for (i = 0; i < ARRAY_SIZE(rpc_service); i++) {
		struct rpc_service *s = &rpc_service[i];
		if (!strcmp(s->name, name + 4)) {
			svc = s;
			break;
		}
	}

	if (!svc)
		forbidden("Unsupported service: '%s'", name);

	if (svc->enabled < 0) {
		const char *user = getenv("REMOTE_USER");
		svc->enabled = (user && *user) ? 1 : 0;
	}
	if (!svc->enabled)
		forbidden("Service not enabled: '%s'", svc->name);
	return svc;
}

static void inflate_request(const char *prog_name, int out)
{
	z_stream stream;
	unsigned char in_buf[8192];
	unsigned char out_buf[8192];
	unsigned long cnt = 0;
	int ret;

	memset(&stream, 0, sizeof(stream));
	ret = inflateInit2(&stream, (15 + 16));
	if (ret != Z_OK)
		die("cannot start zlib inflater, zlib err %d", ret);

	while (1) {
		ssize_t n = xread(0, in_buf, sizeof(in_buf));
		if (n <= 0)
			die("request ended in the middle of the gzip stream");

		stream.next_in = in_buf;
		stream.avail_in = n;

		while (0 < stream.avail_in) {
			int ret;

			stream.next_out = out_buf;
			stream.avail_out = sizeof(out_buf);

			ret = inflate(&stream, Z_NO_FLUSH);
			if (ret != Z_OK && ret != Z_STREAM_END)
				die("zlib error inflating request, result %d", ret);

			n = stream.total_out - cnt;
			if (write_in_full(out, out_buf, n) != n)
				die("%s aborted reading request", prog_name);
			cnt += n;

			if (ret == Z_STREAM_END)
				goto done;
		}
	}

done:
	inflateEnd(&stream);
	close(out);
}

static void run_service(const char **argv)
{
	const char *encoding = getenv("HTTP_CONTENT_ENCODING");
	const char *user = getenv("REMOTE_USER");
	const char *host = getenv("REMOTE_ADDR");
	char *env[3];
	struct strbuf buf = STRBUF_INIT;
	int gzipped_request = 0;
	struct child_process cld;

	if (encoding && !strcmp(encoding, "gzip"))
		gzipped_request = 1;
	else if (encoding && !strcmp(encoding, "x-gzip"))
		gzipped_request = 1;

	if (!user || !*user)
		user = "anonymous";
	if (!host || !*host)
		host = "(none)";

	memset(&env, 0, sizeof(env));
	strbuf_addf(&buf, "GIT_COMMITTER_NAME=%s", user);
	env[0] = strbuf_detach(&buf, NULL);

	strbuf_addf(&buf, "GIT_COMMITTER_EMAIL=%s@http.%s", user, host);
	env[1] = strbuf_detach(&buf, NULL);
	env[2] = NULL;

	memset(&cld, 0, sizeof(cld));
	cld.argv = argv;
	cld.env = (const char *const *)env;
	if (gzipped_request)
		cld.in = -1;
	cld.git_cmd = 1;
	if (start_command(&cld))
		exit(1);

	close(1);
	if (gzipped_request)
		inflate_request(argv[0], cld.in);
	else
		close(0);

	if (finish_command(&cld))
		exit(1);
	free(env[0]);
	free(env[1]);
	strbuf_release(&buf);
}

static int show_text_ref(const char *name, const unsigned char *sha1,
	int flag, void *cb_data)
{
	struct strbuf *buf = cb_data;
	struct object *o = parse_object(sha1);
	if (!o)
		return 0;

	strbuf_addf(buf, "%s\t%s\n", sha1_to_hex(sha1), name);
	if (o->type == OBJ_TAG) {
		o = deref_tag(o, name, 0);
		if (!o)
			return 0;
		strbuf_addf(buf, "%s\t%s^{}\n", sha1_to_hex(o->sha1), name);
	}
	return 0;
}

static void get_info_refs(char *arg)
{
	const char *service_name = get_parameter("service");
	struct strbuf buf = STRBUF_INIT;

	hdr_nocache();

	if (service_name) {
		const char *argv[] = {NULL /* service name */,
			"--stateless-rpc", "--advertise-refs",
			".", NULL};
		struct rpc_service *svc = select_service(service_name);

		strbuf_addf(&buf, "application/x-git-%s-advertisement",
			svc->name);
		hdr_str(content_type, buf.buf);
		end_headers();

		packet_write(1, "# service=git-%s\n", svc->name);
		packet_flush(1);

		argv[0] = svc->name;
		run_service(argv);

	} else {
		select_getanyfile();
		for_each_ref(show_text_ref, &buf);
		send_strbuf("text/plain", &buf);
	}
	strbuf_release(&buf);
}

static void get_info_packs(char *arg)
{
	size_t objdirlen = strlen(get_object_directory());
	struct strbuf buf = STRBUF_INIT;
	struct packed_git *p;
	size_t cnt = 0;

	select_getanyfile();
	prepare_packed_git();
	for (p = packed_git; p; p = p->next) {
		if (p->pack_local)
			cnt++;
	}

	strbuf_grow(&buf, cnt * 53 + 2);
	for (p = packed_git; p; p = p->next) {
		if (p->pack_local)
			strbuf_addf(&buf, "P %s\n", p->pack_name + objdirlen + 6);
	}
	strbuf_addch(&buf, '\n');

	hdr_nocache();
	send_strbuf("text/plain; charset=utf-8", &buf);
	strbuf_release(&buf);
}

static void check_content_type(const char *accepted_type)
{
	const char *actual_type = getenv("CONTENT_TYPE");

	if (!actual_type)
		actual_type = "";

	if (strcmp(actual_type, accepted_type)) {
		http_status(415, "Unsupported Media Type");
		hdr_nocache();
		end_headers();
		format_write(1,
			"Expected POST with Content-Type '%s',"
			" but received '%s' instead.\n",
			accepted_type, actual_type);
		exit(0);
	}
}

static void service_rpc(char *service_name)
{
	const char *argv[] = {NULL, "--stateless-rpc", ".", NULL};
	struct rpc_service *svc = select_service(service_name);
	struct strbuf buf = STRBUF_INIT;

	strbuf_reset(&buf);
	strbuf_addf(&buf, "application/x-git-%s-request", svc->name);
	check_content_type(buf.buf);

	hdr_nocache();

	strbuf_reset(&buf);
	strbuf_addf(&buf, "application/x-git-%s-result", svc->name);
	hdr_str(content_type, buf.buf);

	end_headers();

	argv[0] = svc->name;
	run_service(argv);
	strbuf_release(&buf);
}

static NORETURN void die_webcgi(const char *err, va_list params)
{
	static int dead;

	if (!dead) {
		dead = 1;
		http_status(500, "Internal Server Error");
		hdr_nocache();
		end_headers();

		vreportf("fatal: ", err, params);
	}
	exit(0); /* we successfully reported a failure ;-) */
}

static char* getdir(void)
{
	struct strbuf buf = STRBUF_INIT;
	char *pathinfo = getenv("PATH_INFO");
	char *root = getenv("GIT_PROJECT_ROOT");
	char *path = getenv("PATH_TRANSLATED");

	if (root && *root) {
		if (!pathinfo || !*pathinfo)
			die("GIT_PROJECT_ROOT is set but PATH_INFO is not");
		if (daemon_avoid_alias(pathinfo))
			die("'%s': aliased", pathinfo);
		strbuf_addstr(&buf, root);
		if (buf.buf[buf.len - 1] != '/')
			strbuf_addch(&buf, '/');
		if (pathinfo[0] == '/')
			pathinfo++;
		strbuf_addstr(&buf, pathinfo);
		return strbuf_detach(&buf, NULL);
	} else if (path && *path) {
		return xstrdup(path);
	} else
		die("No GIT_PROJECT_ROOT or PATH_TRANSLATED from server");
	return NULL;
}

static struct service_cmd {
	const char *method;
	const char *pattern;
	void (*imp)(char *);
} services[] = {
	{"GET", "/HEAD$", get_text_file},
	{"GET", "/info/refs$", get_info_refs},
	{"GET", "/objects/info/alternates$", get_text_file},
	{"GET", "/objects/info/http-alternates$", get_text_file},
	{"GET", "/objects/info/packs$", get_info_packs},
	{"GET", "/objects/[0-9a-f]{2}/[0-9a-f]{38}$", get_loose_object},
	{"GET", "/objects/pack/pack-[0-9a-f]{40}\\.pack$", get_pack_file},
	{"GET", "/objects/pack/pack-[0-9a-f]{40}\\.idx$", get_idx_file},

	{"POST", "/git-upload-pack$", service_rpc},
	{"POST", "/git-receive-pack$", service_rpc}
};

int main(int argc, char **argv)
{
	char *method = getenv("REQUEST_METHOD");
	char *dir;
	struct service_cmd *cmd = NULL;
	char *cmd_arg = NULL;
	int i;

	git_extract_argv0_path(argv[0]);
	set_die_routine(die_webcgi);

	if (!method)
		die("No REQUEST_METHOD from server");
	if (!strcmp(method, "HEAD"))
		method = "GET";
	dir = getdir();

	for (i = 0; i < ARRAY_SIZE(services); i++) {
		struct service_cmd *c = &services[i];
		regex_t re;
		regmatch_t out[1];

		if (regcomp(&re, c->pattern, REG_EXTENDED))
			die("Bogus regex in service table: %s", c->pattern);
		if (!regexec(&re, dir, 1, out, 0)) {
			size_t n;

			if (strcmp(method, c->method)) {
				const char *proto = getenv("SERVER_PROTOCOL");
				if (proto && !strcmp(proto, "HTTP/1.1"))
					http_status(405, "Method Not Allowed");
				else
					http_status(400, "Bad Request");
				hdr_nocache();
				end_headers();
				return 0;
			}

			cmd = c;
			n = out[0].rm_eo - out[0].rm_so;
			cmd_arg = xmalloc(n);
			memcpy(cmd_arg, dir + out[0].rm_so + 1, n-1);
			cmd_arg[n-1] = '\0';
			dir[out[0].rm_so] = 0;
			break;
		}
		regfree(&re);
	}

	if (!cmd)
		not_found("Request not supported: '%s'", dir);

	setup_path();
	if (!enter_repo(dir, 0))
		not_found("Not a git repository: '%s'", dir);
	if (!getenv("GIT_HTTP_EXPORT_ALL") &&
	    access("git-daemon-export-ok", F_OK) )
		not_found("Repository not exported: '%s'", dir);

	git_config(http_config, NULL);
	cmd->imp(cmd_arg);
	return 0;
}