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-rw-r--r--third_party/git/daemon.c1485
1 files changed, 0 insertions, 1485 deletions
diff --git a/third_party/git/daemon.c b/third_party/git/daemon.c
deleted file mode 100644
index 9d2e0d20ef..0000000000
--- a/third_party/git/daemon.c
+++ /dev/null
@@ -1,1485 +0,0 @@
-#include "cache.h"
-#include "config.h"
-#include "pkt-line.h"
-#include "run-command.h"
-#include "strbuf.h"
-#include "string-list.h"
-
-#ifdef NO_INITGROUPS
-#define initgroups(x, y) (0) /* nothing */
-#endif
-
-static enum log_destination {
-	LOG_DESTINATION_UNSET = -1,
-	LOG_DESTINATION_NONE = 0,
-	LOG_DESTINATION_STDERR = 1,
-	LOG_DESTINATION_SYSLOG = 2,
-} log_destination = LOG_DESTINATION_UNSET;
-static int verbose;
-static int reuseaddr;
-static int informative_errors;
-
-static const char daemon_usage[] =
-"git daemon [--verbose] [--syslog] [--export-all]\n"
-"           [--timeout=<n>] [--init-timeout=<n>] [--max-connections=<n>]\n"
-"           [--strict-paths] [--base-path=<path>] [--base-path-relaxed]\n"
-"           [--user-path | --user-path=<path>]\n"
-"           [--interpolated-path=<path>]\n"
-"           [--reuseaddr] [--pid-file=<file>]\n"
-"           [--(enable|disable|allow-override|forbid-override)=<service>]\n"
-"           [--access-hook=<path>]\n"
-"           [--inetd | [--listen=<host_or_ipaddr>] [--port=<n>]\n"
-"                      [--detach] [--user=<user> [--group=<group>]]\n"
-"           [--log-destination=(stderr|syslog|none)]\n"
-"           [<directory>...]";
-
-/* List of acceptable pathname prefixes */
-static const char **ok_paths;
-static int strict_paths;
-
-/* If this is set, git-daemon-export-ok is not required */
-static int export_all_trees;
-
-/* Take all paths relative to this one if non-NULL */
-static const char *base_path;
-static const char *interpolated_path;
-static int base_path_relaxed;
-
-/* If defined, ~user notation is allowed and the string is inserted
- * after ~user/.  E.g. a request to git://host/~alice/frotz would
- * go to /home/alice/pub_git/frotz with --user-path=pub_git.
- */
-static const char *user_path;
-
-/* Timeout, and initial timeout */
-static unsigned int timeout;
-static unsigned int init_timeout;
-
-struct hostinfo {
-	struct strbuf hostname;
-	struct strbuf canon_hostname;
-	struct strbuf ip_address;
-	struct strbuf tcp_port;
-	unsigned int hostname_lookup_done:1;
-	unsigned int saw_extended_args:1;
-};
-
-static void lookup_hostname(struct hostinfo *hi);
-
-static const char *get_canon_hostname(struct hostinfo *hi)
-{
-	lookup_hostname(hi);
-	return hi->canon_hostname.buf;
-}
-
-static const char *get_ip_address(struct hostinfo *hi)
-{
-	lookup_hostname(hi);
-	return hi->ip_address.buf;
-}
-
-static void logreport(int priority, const char *err, va_list params)
-{
-	switch (log_destination) {
-	case LOG_DESTINATION_SYSLOG: {
-		char buf[1024];
-		vsnprintf(buf, sizeof(buf), err, params);
-		syslog(priority, "%s", buf);
-		break;
-	}
-	case LOG_DESTINATION_STDERR:
-		/*
-		 * Since stderr is set to buffered mode, the
-		 * logging of different processes will not overlap
-		 * unless they overflow the (rather big) buffers.
-		 */
-		fprintf(stderr, "[%"PRIuMAX"] ", (uintmax_t)getpid());
-		vfprintf(stderr, err, params);
-		fputc('\n', stderr);
-		fflush(stderr);
-		break;
-	case LOG_DESTINATION_NONE:
-		break;
-	case LOG_DESTINATION_UNSET:
-		BUG("log destination not initialized correctly");
-	}
-}
-
-__attribute__((format (printf, 1, 2)))
-static void logerror(const char *err, ...)
-{
-	va_list params;
-	va_start(params, err);
-	logreport(LOG_ERR, err, params);
-	va_end(params);
-}
-
-__attribute__((format (printf, 1, 2)))
-static void loginfo(const char *err, ...)
-{
-	va_list params;
-	if (!verbose)
-		return;
-	va_start(params, err);
-	logreport(LOG_INFO, err, params);
-	va_end(params);
-}
-
-static void NORETURN daemon_die(const char *err, va_list params)
-{
-	logreport(LOG_ERR, err, params);
-	exit(1);
-}
-
-struct expand_path_context {
-	const char *directory;
-	struct hostinfo *hostinfo;
-};
-
-static size_t expand_path(struct strbuf *sb, const char *placeholder, void *ctx)
-{
-	struct expand_path_context *context = ctx;
-	struct hostinfo *hi = context->hostinfo;
-
-	switch (placeholder[0]) {
-	case 'H':
-		strbuf_addbuf(sb, &hi->hostname);
-		return 1;
-	case 'C':
-		if (placeholder[1] == 'H') {
-			strbuf_addstr(sb, get_canon_hostname(hi));
-			return 2;
-		}
-		break;
-	case 'I':
-		if (placeholder[1] == 'P') {
-			strbuf_addstr(sb, get_ip_address(hi));
-			return 2;
-		}
-		break;
-	case 'P':
-		strbuf_addbuf(sb, &hi->tcp_port);
-		return 1;
-	case 'D':
-		strbuf_addstr(sb, context->directory);
-		return 1;
-	}
-	return 0;
-}
-
-static const char *path_ok(const char *directory, struct hostinfo *hi)
-{
-	static char rpath[PATH_MAX];
-	static char interp_path[PATH_MAX];
-	size_t rlen;
-	const char *path;
-	const char *dir;
-
-	dir = directory;
-
-	if (daemon_avoid_alias(dir)) {
-		logerror("'%s': aliased", dir);
-		return NULL;
-	}
-
-	if (*dir == '~') {
-		if (!user_path) {
-			logerror("'%s': User-path not allowed", dir);
-			return NULL;
-		}
-		if (*user_path) {
-			/* Got either "~alice" or "~alice/foo";
-			 * rewrite them to "~alice/%s" or
-			 * "~alice/%s/foo".
-			 */
-			int namlen, restlen = strlen(dir);
-			const char *slash = strchr(dir, '/');
-			if (!slash)
-				slash = dir + restlen;
-			namlen = slash - dir;
-			restlen -= namlen;
-			loginfo("userpath <%s>, request <%s>, namlen %d, restlen %d, slash <%s>", user_path, dir, namlen, restlen, slash);
-			rlen = snprintf(rpath, sizeof(rpath), "%.*s/%s%.*s",
-					namlen, dir, user_path, restlen, slash);
-			if (rlen >= sizeof(rpath)) {
-				logerror("user-path too large: %s", rpath);
-				return NULL;
-			}
-			dir = rpath;
-		}
-	}
-	else if (interpolated_path && hi->saw_extended_args) {
-		struct strbuf expanded_path = STRBUF_INIT;
-		struct expand_path_context context;
-
-		context.directory = directory;
-		context.hostinfo = hi;
-
-		if (*dir != '/') {
-			/* Allow only absolute */
-			logerror("'%s': Non-absolute path denied (interpolated-path active)", dir);
-			return NULL;
-		}
-
-		strbuf_expand(&expanded_path, interpolated_path,
-			      expand_path, &context);
-
-		rlen = strlcpy(interp_path, expanded_path.buf,
-			       sizeof(interp_path));
-		if (rlen >= sizeof(interp_path)) {
-			logerror("interpolated path too large: %s",
-				 interp_path);
-			return NULL;
-		}
-
-		strbuf_release(&expanded_path);
-		loginfo("Interpolated dir '%s'", interp_path);
-
-		dir = interp_path;
-	}
-	else if (base_path) {
-		if (*dir != '/') {
-			/* Allow only absolute */
-			logerror("'%s': Non-absolute path denied (base-path active)", dir);
-			return NULL;
-		}
-		rlen = snprintf(rpath, sizeof(rpath), "%s%s", base_path, dir);
-		if (rlen >= sizeof(rpath)) {
-			logerror("base-path too large: %s", rpath);
-			return NULL;
-		}
-		dir = rpath;
-	}
-
-	path = enter_repo(dir, strict_paths);
-	if (!path && base_path && base_path_relaxed) {
-		/*
-		 * if we fail and base_path_relaxed is enabled, try without
-		 * prefixing the base path
-		 */
-		dir = directory;
-		path = enter_repo(dir, strict_paths);
-	}
-
-	if (!path) {
-		logerror("'%s' does not appear to be a git repository", dir);
-		return NULL;
-	}
-
-	if ( ok_paths && *ok_paths ) {
-		const char **pp;
-		int pathlen = strlen(path);
-
-		/* The validation is done on the paths after enter_repo
-		 * appends optional {.git,.git/.git} and friends, but
-		 * it does not use getcwd().  So if your /pub is
-		 * a symlink to /mnt/pub, you can whitelist /pub and
-		 * do not have to say /mnt/pub.
-		 * Do not say /pub/.
-		 */
-		for ( pp = ok_paths ; *pp ; pp++ ) {
-			int len = strlen(*pp);
-			if (len <= pathlen &&
-			    !memcmp(*pp, path, len) &&
-			    (path[len] == '\0' ||
-			     (!strict_paths && path[len] == '/')))
-				return path;
-		}
-	}
-	else {
-		/* be backwards compatible */
-		if (!strict_paths)
-			return path;
-	}
-
-	logerror("'%s': not in whitelist", path);
-	return NULL;		/* Fallthrough. Deny by default */
-}
-
-typedef int (*daemon_service_fn)(const struct argv_array *env);
-struct daemon_service {
-	const char *name;
-	const char *config_name;
-	daemon_service_fn fn;
-	int enabled;
-	int overridable;
-};
-
-static int daemon_error(const char *dir, const char *msg)
-{
-	if (!informative_errors)
-		msg = "access denied or repository not exported";
-	packet_write_fmt(1, "ERR %s: %s", msg, dir);
-	return -1;
-}
-
-static const char *access_hook;
-
-static int run_access_hook(struct daemon_service *service, const char *dir,
-			   const char *path, struct hostinfo *hi)
-{
-	struct child_process child = CHILD_PROCESS_INIT;
-	struct strbuf buf = STRBUF_INIT;
-	const char *argv[8];
-	const char **arg = argv;
-	char *eol;
-	int seen_errors = 0;
-
-	*arg++ = access_hook;
-	*arg++ = service->name;
-	*arg++ = path;
-	*arg++ = hi->hostname.buf;
-	*arg++ = get_canon_hostname(hi);
-	*arg++ = get_ip_address(hi);
-	*arg++ = hi->tcp_port.buf;
-	*arg = NULL;
-
-	child.use_shell = 1;
-	child.argv = argv;
-	child.no_stdin = 1;
-	child.no_stderr = 1;
-	child.out = -1;
-	if (start_command(&child)) {
-		logerror("daemon access hook '%s' failed to start",
-			 access_hook);
-		goto error_return;
-	}
-	if (strbuf_read(&buf, child.out, 0) < 0) {
-		logerror("failed to read from pipe to daemon access hook '%s'",
-			 access_hook);
-		strbuf_reset(&buf);
-		seen_errors = 1;
-	}
-	if (close(child.out) < 0) {
-		logerror("failed to close pipe to daemon access hook '%s'",
-			 access_hook);
-		seen_errors = 1;
-	}
-	if (finish_command(&child))
-		seen_errors = 1;
-
-	if (!seen_errors) {
-		strbuf_release(&buf);
-		return 0;
-	}
-
-error_return:
-	strbuf_ltrim(&buf);
-	if (!buf.len)
-		strbuf_addstr(&buf, "service rejected");
-	eol = strchr(buf.buf, '\n');
-	if (eol)
-		*eol = '\0';
-	errno = EACCES;
-	daemon_error(dir, buf.buf);
-	strbuf_release(&buf);
-	return -1;
-}
-
-static int run_service(const char *dir, struct daemon_service *service,
-		       struct hostinfo *hi, const struct argv_array *env)
-{
-	const char *path;
-	int enabled = service->enabled;
-	struct strbuf var = STRBUF_INIT;
-
-	loginfo("Request %s for '%s'", service->name, dir);
-
-	if (!enabled && !service->overridable) {
-		logerror("'%s': service not enabled.", service->name);
-		errno = EACCES;
-		return daemon_error(dir, "service not enabled");
-	}
-
-	if (!(path = path_ok(dir, hi)))
-		return daemon_error(dir, "no such repository");
-
-	/*
-	 * Security on the cheap.
-	 *
-	 * We want a readable HEAD, usable "objects" directory, and
-	 * a "git-daemon-export-ok" flag that says that the other side
-	 * is ok with us doing this.
-	 *
-	 * path_ok() uses enter_repo() and does whitelist checking.
-	 * We only need to make sure the repository is exported.
-	 */
-
-	if (!export_all_trees && access("git-daemon-export-ok", F_OK)) {
-		logerror("'%s': repository not exported.", path);
-		errno = EACCES;
-		return daemon_error(dir, "repository not exported");
-	}
-
-	if (service->overridable) {
-		strbuf_addf(&var, "daemon.%s", service->config_name);
-		git_config_get_bool(var.buf, &enabled);
-		strbuf_release(&var);
-	}
-	if (!enabled) {
-		logerror("'%s': service not enabled for '%s'",
-			 service->name, path);
-		errno = EACCES;
-		return daemon_error(dir, "service not enabled");
-	}
-
-	/*
-	 * Optionally, a hook can choose to deny access to the
-	 * repository depending on the phase of the moon.
-	 */
-	if (access_hook && run_access_hook(service, dir, path, hi))
-		return -1;
-
-	/*
-	 * We'll ignore SIGTERM from now on, we have a
-	 * good client.
-	 */
-	signal(SIGTERM, SIG_IGN);
-
-	return service->fn(env);
-}
-
-static void copy_to_log(int fd)
-{
-	struct strbuf line = STRBUF_INIT;
-	FILE *fp;
-
-	fp = fdopen(fd, "r");
-	if (fp == NULL) {
-		logerror("fdopen of error channel failed");
-		close(fd);
-		return;
-	}
-
-	while (strbuf_getline_lf(&line, fp) != EOF) {
-		logerror("%s", line.buf);
-		strbuf_setlen(&line, 0);
-	}
-
-	strbuf_release(&line);
-	fclose(fp);
-}
-
-static int run_service_command(struct child_process *cld)
-{
-	argv_array_push(&cld->args, ".");
-	cld->git_cmd = 1;
-	cld->err = -1;
-	if (start_command(cld))
-		return -1;
-
-	close(0);
-	close(1);
-
-	copy_to_log(cld->err);
-
-	return finish_command(cld);
-}
-
-static int upload_pack(const struct argv_array *env)
-{
-	struct child_process cld = CHILD_PROCESS_INIT;
-	argv_array_pushl(&cld.args, "upload-pack", "--strict", NULL);
-	argv_array_pushf(&cld.args, "--timeout=%u", timeout);
-
-	argv_array_pushv(&cld.env_array, env->argv);
-
-	return run_service_command(&cld);
-}
-
-static int upload_archive(const struct argv_array *env)
-{
-	struct child_process cld = CHILD_PROCESS_INIT;
-	argv_array_push(&cld.args, "upload-archive");
-
-	argv_array_pushv(&cld.env_array, env->argv);
-
-	return run_service_command(&cld);
-}
-
-static int receive_pack(const struct argv_array *env)
-{
-	struct child_process cld = CHILD_PROCESS_INIT;
-	argv_array_push(&cld.args, "receive-pack");
-
-	argv_array_pushv(&cld.env_array, env->argv);
-
-	return run_service_command(&cld);
-}
-
-static struct daemon_service daemon_service[] = {
-	{ "upload-archive", "uploadarch", upload_archive, 0, 1 },
-	{ "upload-pack", "uploadpack", upload_pack, 1, 1 },
-	{ "receive-pack", "receivepack", receive_pack, 0, 1 },
-};
-
-static void enable_service(const char *name, int ena)
-{
-	int i;
-	for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
-		if (!strcmp(daemon_service[i].name, name)) {
-			daemon_service[i].enabled = ena;
-			return;
-		}
-	}
-	die("No such service %s", name);
-}
-
-static void make_service_overridable(const char *name, int ena)
-{
-	int i;
-	for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
-		if (!strcmp(daemon_service[i].name, name)) {
-			daemon_service[i].overridable = ena;
-			return;
-		}
-	}
-	die("No such service %s", name);
-}
-
-static void parse_host_and_port(char *hostport, char **host,
-	char **port)
-{
-	if (*hostport == '[') {
-		char *end;
-
-		end = strchr(hostport, ']');
-		if (!end)
-			die("Invalid request ('[' without ']')");
-		*end = '\0';
-		*host = hostport + 1;
-		if (!end[1])
-			*port = NULL;
-		else if (end[1] == ':')
-			*port = end + 2;
-		else
-			die("Garbage after end of host part");
-	} else {
-		*host = hostport;
-		*port = strrchr(hostport, ':');
-		if (*port) {
-			**port = '\0';
-			++*port;
-		}
-	}
-}
-
-/*
- * Sanitize a string from the client so that it's OK to be inserted into a
- * filesystem path. Specifically, we disallow slashes, runs of "..", and
- * trailing and leading dots, which means that the client cannot escape
- * our base path via ".." traversal.
- */
-static void sanitize_client(struct strbuf *out, const char *in)
-{
-	for (; *in; in++) {
-		if (*in == '/')
-			continue;
-		if (*in == '.' && (!out->len || out->buf[out->len - 1] == '.'))
-			continue;
-		strbuf_addch(out, *in);
-	}
-
-	while (out->len && out->buf[out->len - 1] == '.')
-		strbuf_setlen(out, out->len - 1);
-}
-
-/*
- * Like sanitize_client, but we also perform any canonicalization
- * to make life easier on the admin.
- */
-static void canonicalize_client(struct strbuf *out, const char *in)
-{
-	sanitize_client(out, in);
-	strbuf_tolower(out);
-}
-
-/*
- * Read the host as supplied by the client connection.
- *
- * Returns a pointer to the character after the NUL byte terminating the host
- * arguemnt, or 'extra_args' if there is no host arguemnt.
- */
-static char *parse_host_arg(struct hostinfo *hi, char *extra_args, int buflen)
-{
-	char *val;
-	int vallen;
-	char *end = extra_args + buflen;
-
-	if (extra_args < end && *extra_args) {
-		hi->saw_extended_args = 1;
-		if (strncasecmp("host=", extra_args, 5) == 0) {
-			val = extra_args + 5;
-			vallen = strlen(val) + 1;
-			loginfo("Extended attribute \"host\": %s", val);
-			if (*val) {
-				/* Split <host>:<port> at colon. */
-				char *host;
-				char *port;
-				parse_host_and_port(val, &host, &port);
-				if (port)
-					sanitize_client(&hi->tcp_port, port);
-				canonicalize_client(&hi->hostname, host);
-				hi->hostname_lookup_done = 0;
-			}
-
-			/* On to the next one */
-			extra_args = val + vallen;
-		}
-		if (extra_args < end && *extra_args)
-			die("Invalid request");
-	}
-
-	return extra_args;
-}
-
-static void parse_extra_args(struct hostinfo *hi, struct argv_array *env,
-			     char *extra_args, int buflen)
-{
-	const char *end = extra_args + buflen;
-	struct strbuf git_protocol = STRBUF_INIT;
-
-	/* First look for the host argument */
-	extra_args = parse_host_arg(hi, extra_args, buflen);
-
-	/* Look for additional arguments places after a second NUL byte */
-	for (; extra_args < end; extra_args += strlen(extra_args) + 1) {
-		const char *arg = extra_args;
-
-		/*
-		 * Parse the extra arguments, adding most to 'git_protocol'
-		 * which will be used to set the 'GIT_PROTOCOL' envvar in the
-		 * service that will be run.
-		 *
-		 * If there ends up being a particular arg in the future that
-		 * git-daemon needs to parse specificly (like the 'host' arg)
-		 * then it can be parsed here and not added to 'git_protocol'.
-		 */
-		if (*arg) {
-			if (git_protocol.len > 0)
-				strbuf_addch(&git_protocol, ':');
-			strbuf_addstr(&git_protocol, arg);
-		}
-	}
-
-	if (git_protocol.len > 0) {
-		loginfo("Extended attribute \"protocol\": %s", git_protocol.buf);
-		argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=%s",
-				 git_protocol.buf);
-	}
-	strbuf_release(&git_protocol);
-}
-
-/*
- * Locate canonical hostname and its IP address.
- */
-static void lookup_hostname(struct hostinfo *hi)
-{
-	if (!hi->hostname_lookup_done && hi->hostname.len) {
-#ifndef NO_IPV6
-		struct addrinfo hints;
-		struct addrinfo *ai;
-		int gai;
-		static char addrbuf[HOST_NAME_MAX + 1];
-
-		memset(&hints, 0, sizeof(hints));
-		hints.ai_flags = AI_CANONNAME;
-
-		gai = getaddrinfo(hi->hostname.buf, NULL, &hints, &ai);
-		if (!gai) {
-			struct sockaddr_in *sin_addr = (void *)ai->ai_addr;
-
-			inet_ntop(AF_INET, &sin_addr->sin_addr,
-				  addrbuf, sizeof(addrbuf));
-			strbuf_addstr(&hi->ip_address, addrbuf);
-
-			if (ai->ai_canonname)
-				sanitize_client(&hi->canon_hostname,
-						ai->ai_canonname);
-			else
-				strbuf_addbuf(&hi->canon_hostname,
-					      &hi->ip_address);
-
-			freeaddrinfo(ai);
-		}
-#else
-		struct hostent *hent;
-		struct sockaddr_in sa;
-		char **ap;
-		static char addrbuf[HOST_NAME_MAX + 1];
-
-		hent = gethostbyname(hi->hostname.buf);
-		if (hent) {
-			ap = hent->h_addr_list;
-			memset(&sa, 0, sizeof sa);
-			sa.sin_family = hent->h_addrtype;
-			sa.sin_port = htons(0);
-			memcpy(&sa.sin_addr, *ap, hent->h_length);
-
-			inet_ntop(hent->h_addrtype, &sa.sin_addr,
-				  addrbuf, sizeof(addrbuf));
-
-			sanitize_client(&hi->canon_hostname, hent->h_name);
-			strbuf_addstr(&hi->ip_address, addrbuf);
-		}
-#endif
-		hi->hostname_lookup_done = 1;
-	}
-}
-
-static void hostinfo_init(struct hostinfo *hi)
-{
-	memset(hi, 0, sizeof(*hi));
-	strbuf_init(&hi->hostname, 0);
-	strbuf_init(&hi->canon_hostname, 0);
-	strbuf_init(&hi->ip_address, 0);
-	strbuf_init(&hi->tcp_port, 0);
-}
-
-static void hostinfo_clear(struct hostinfo *hi)
-{
-	strbuf_release(&hi->hostname);
-	strbuf_release(&hi->canon_hostname);
-	strbuf_release(&hi->ip_address);
-	strbuf_release(&hi->tcp_port);
-}
-
-static void set_keep_alive(int sockfd)
-{
-	int ka = 1;
-
-	if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) {
-		if (errno != ENOTSOCK)
-			logerror("unable to set SO_KEEPALIVE on socket: %s",
-				strerror(errno));
-	}
-}
-
-static int execute(void)
-{
-	char *line = packet_buffer;
-	int pktlen, len, i;
-	char *addr = getenv("REMOTE_ADDR"), *port = getenv("REMOTE_PORT");
-	struct hostinfo hi;
-	struct argv_array env = ARGV_ARRAY_INIT;
-
-	hostinfo_init(&hi);
-
-	if (addr)
-		loginfo("Connection from %s:%s", addr, port);
-
-	set_keep_alive(0);
-	alarm(init_timeout ? init_timeout : timeout);
-	pktlen = packet_read(0, NULL, NULL, packet_buffer, sizeof(packet_buffer), 0);
-	alarm(0);
-
-	len = strlen(line);
-	if (len && line[len-1] == '\n')
-		line[len-1] = 0;
-
-	/* parse additional args hidden behind a NUL byte */
-	if (len != pktlen)
-		parse_extra_args(&hi, &env, line + len + 1, pktlen - len - 1);
-
-	for (i = 0; i < ARRAY_SIZE(daemon_service); i++) {
-		struct daemon_service *s = &(daemon_service[i]);
-		const char *arg;
-
-		if (skip_prefix(line, "git-", &arg) &&
-		    skip_prefix(arg, s->name, &arg) &&
-		    *arg++ == ' ') {
-			/*
-			 * Note: The directory here is probably context sensitive,
-			 * and might depend on the actual service being performed.
-			 */
-			int rc = run_service(arg, s, &hi, &env);
-			hostinfo_clear(&hi);
-			argv_array_clear(&env);
-			return rc;
-		}
-	}
-
-	hostinfo_clear(&hi);
-	argv_array_clear(&env);
-	logerror("Protocol error: '%s'", line);
-	return -1;
-}
-
-static int addrcmp(const struct sockaddr_storage *s1,
-    const struct sockaddr_storage *s2)
-{
-	const struct sockaddr *sa1 = (const struct sockaddr*) s1;
-	const struct sockaddr *sa2 = (const struct sockaddr*) s2;
-
-	if (sa1->sa_family != sa2->sa_family)
-		return sa1->sa_family - sa2->sa_family;
-	if (sa1->sa_family == AF_INET)
-		return memcmp(&((struct sockaddr_in *)s1)->sin_addr,
-		    &((struct sockaddr_in *)s2)->sin_addr,
-		    sizeof(struct in_addr));
-#ifndef NO_IPV6
-	if (sa1->sa_family == AF_INET6)
-		return memcmp(&((struct sockaddr_in6 *)s1)->sin6_addr,
-		    &((struct sockaddr_in6 *)s2)->sin6_addr,
-		    sizeof(struct in6_addr));
-#endif
-	return 0;
-}
-
-static int max_connections = 32;
-
-static unsigned int live_children;
-
-static struct child {
-	struct child *next;
-	struct child_process cld;
-	struct sockaddr_storage address;
-} *firstborn;
-
-static void add_child(struct child_process *cld, struct sockaddr *addr, socklen_t addrlen)
-{
-	struct child *newborn, **cradle;
-
-	newborn = xcalloc(1, sizeof(*newborn));
-	live_children++;
-	memcpy(&newborn->cld, cld, sizeof(*cld));
-	memcpy(&newborn->address, addr, addrlen);
-	for (cradle = &firstborn; *cradle; cradle = &(*cradle)->next)
-		if (!addrcmp(&(*cradle)->address, &newborn->address))
-			break;
-	newborn->next = *cradle;
-	*cradle = newborn;
-}
-
-/*
- * This gets called if the number of connections grows
- * past "max_connections".
- *
- * We kill the newest connection from a duplicate IP.
- */
-static void kill_some_child(void)
-{
-	const struct child *blanket, *next;
-
-	if (!(blanket = firstborn))
-		return;
-
-	for (; (next = blanket->next); blanket = next)
-		if (!addrcmp(&blanket->address, &next->address)) {
-			kill(blanket->cld.pid, SIGTERM);
-			break;
-		}
-}
-
-static void check_dead_children(void)
-{
-	int status;
-	pid_t pid;
-
-	struct child **cradle, *blanket;
-	for (cradle = &firstborn; (blanket = *cradle);)
-		if ((pid = waitpid(blanket->cld.pid, &status, WNOHANG)) > 1) {
-			const char *dead = "";
-			if (status)
-				dead = " (with error)";
-			loginfo("[%"PRIuMAX"] Disconnected%s", (uintmax_t)pid, dead);
-
-			/* remove the child */
-			*cradle = blanket->next;
-			live_children--;
-			child_process_clear(&blanket->cld);
-			free(blanket);
-		} else
-			cradle = &blanket->next;
-}
-
-static struct argv_array cld_argv = ARGV_ARRAY_INIT;
-static void handle(int incoming, struct sockaddr *addr, socklen_t addrlen)
-{
-	struct child_process cld = CHILD_PROCESS_INIT;
-
-	if (max_connections && live_children >= max_connections) {
-		kill_some_child();
-		sleep(1);  /* give it some time to die */
-		check_dead_children();
-		if (live_children >= max_connections) {
-			close(incoming);
-			logerror("Too many children, dropping connection");
-			return;
-		}
-	}
-
-	if (addr->sa_family == AF_INET) {
-		char buf[128] = "";
-		struct sockaddr_in *sin_addr = (void *) addr;
-		inet_ntop(addr->sa_family, &sin_addr->sin_addr, buf, sizeof(buf));
-		argv_array_pushf(&cld.env_array, "REMOTE_ADDR=%s", buf);
-		argv_array_pushf(&cld.env_array, "REMOTE_PORT=%d",
-				 ntohs(sin_addr->sin_port));
-#ifndef NO_IPV6
-	} else if (addr->sa_family == AF_INET6) {
-		char buf[128] = "";
-		struct sockaddr_in6 *sin6_addr = (void *) addr;
-		inet_ntop(AF_INET6, &sin6_addr->sin6_addr, buf, sizeof(buf));
-		argv_array_pushf(&cld.env_array, "REMOTE_ADDR=[%s]", buf);
-		argv_array_pushf(&cld.env_array, "REMOTE_PORT=%d",
-				 ntohs(sin6_addr->sin6_port));
-#endif
-	}
-
-	cld.argv = cld_argv.argv;
-	cld.in = incoming;
-	cld.out = dup(incoming);
-
-	if (start_command(&cld))
-		logerror("unable to fork");
-	else
-		add_child(&cld, addr, addrlen);
-}
-
-static void child_handler(int signo)
-{
-	/*
-	 * Otherwise empty handler because systemcalls will get interrupted
-	 * upon signal receipt
-	 * SysV needs the handler to be rearmed
-	 */
-	signal(SIGCHLD, child_handler);
-}
-
-static int set_reuse_addr(int sockfd)
-{
-	int on = 1;
-
-	if (!reuseaddr)
-		return 0;
-	return setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR,
-			  &on, sizeof(on));
-}
-
-struct socketlist {
-	int *list;
-	size_t nr;
-	size_t alloc;
-};
-
-static const char *ip2str(int family, struct sockaddr *sin, socklen_t len)
-{
-#ifdef NO_IPV6
-	static char ip[INET_ADDRSTRLEN];
-#else
-	static char ip[INET6_ADDRSTRLEN];
-#endif
-
-	switch (family) {
-#ifndef NO_IPV6
-	case AF_INET6:
-		inet_ntop(family, &((struct sockaddr_in6*)sin)->sin6_addr, ip, len);
-		break;
-#endif
-	case AF_INET:
-		inet_ntop(family, &((struct sockaddr_in*)sin)->sin_addr, ip, len);
-		break;
-	default:
-		xsnprintf(ip, sizeof(ip), "<unknown>");
-	}
-	return ip;
-}
-
-#ifndef NO_IPV6
-
-static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
-{
-	int socknum = 0;
-	char pbuf[NI_MAXSERV];
-	struct addrinfo hints, *ai0, *ai;
-	int gai;
-	long flags;
-
-	xsnprintf(pbuf, sizeof(pbuf), "%d", listen_port);
-	memset(&hints, 0, sizeof(hints));
-	hints.ai_family = AF_UNSPEC;
-	hints.ai_socktype = SOCK_STREAM;
-	hints.ai_protocol = IPPROTO_TCP;
-	hints.ai_flags = AI_PASSIVE;
-
-	gai = getaddrinfo(listen_addr, pbuf, &hints, &ai0);
-	if (gai) {
-		logerror("getaddrinfo() for %s failed: %s", listen_addr, gai_strerror(gai));
-		return 0;
-	}
-
-	for (ai = ai0; ai; ai = ai->ai_next) {
-		int sockfd;
-
-		sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
-		if (sockfd < 0)
-			continue;
-		if (sockfd >= FD_SETSIZE) {
-			logerror("Socket descriptor too large");
-			close(sockfd);
-			continue;
-		}
-
-#ifdef IPV6_V6ONLY
-		if (ai->ai_family == AF_INET6) {
-			int on = 1;
-			setsockopt(sockfd, IPPROTO_IPV6, IPV6_V6ONLY,
-				   &on, sizeof(on));
-			/* Note: error is not fatal */
-		}
-#endif
-
-		if (set_reuse_addr(sockfd)) {
-			logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
-			close(sockfd);
-			continue;
-		}
-
-		set_keep_alive(sockfd);
-
-		if (bind(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
-			logerror("Could not bind to %s: %s",
-				 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
-				 strerror(errno));
-			close(sockfd);
-			continue;	/* not fatal */
-		}
-		if (listen(sockfd, 5) < 0) {
-			logerror("Could not listen to %s: %s",
-				 ip2str(ai->ai_family, ai->ai_addr, ai->ai_addrlen),
-				 strerror(errno));
-			close(sockfd);
-			continue;	/* not fatal */
-		}
-
-		flags = fcntl(sockfd, F_GETFD, 0);
-		if (flags >= 0)
-			fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
-
-		ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
-		socklist->list[socklist->nr++] = sockfd;
-		socknum++;
-	}
-
-	freeaddrinfo(ai0);
-
-	return socknum;
-}
-
-#else /* NO_IPV6 */
-
-static int setup_named_sock(char *listen_addr, int listen_port, struct socketlist *socklist)
-{
-	struct sockaddr_in sin;
-	int sockfd;
-	long flags;
-
-	memset(&sin, 0, sizeof sin);
-	sin.sin_family = AF_INET;
-	sin.sin_port = htons(listen_port);
-
-	if (listen_addr) {
-		/* Well, host better be an IP address here. */
-		if (inet_pton(AF_INET, listen_addr, &sin.sin_addr.s_addr) <= 0)
-			return 0;
-	} else {
-		sin.sin_addr.s_addr = htonl(INADDR_ANY);
-	}
-
-	sockfd = socket(AF_INET, SOCK_STREAM, 0);
-	if (sockfd < 0)
-		return 0;
-
-	if (set_reuse_addr(sockfd)) {
-		logerror("Could not set SO_REUSEADDR: %s", strerror(errno));
-		close(sockfd);
-		return 0;
-	}
-
-	set_keep_alive(sockfd);
-
-	if ( bind(sockfd, (struct sockaddr *)&sin, sizeof sin) < 0 ) {
-		logerror("Could not bind to %s: %s",
-			 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
-			 strerror(errno));
-		close(sockfd);
-		return 0;
-	}
-
-	if (listen(sockfd, 5) < 0) {
-		logerror("Could not listen to %s: %s",
-			 ip2str(AF_INET, (struct sockaddr *)&sin, sizeof(sin)),
-			 strerror(errno));
-		close(sockfd);
-		return 0;
-	}
-
-	flags = fcntl(sockfd, F_GETFD, 0);
-	if (flags >= 0)
-		fcntl(sockfd, F_SETFD, flags | FD_CLOEXEC);
-
-	ALLOC_GROW(socklist->list, socklist->nr + 1, socklist->alloc);
-	socklist->list[socklist->nr++] = sockfd;
-	return 1;
-}
-
-#endif
-
-static void socksetup(struct string_list *listen_addr, int listen_port, struct socketlist *socklist)
-{
-	if (!listen_addr->nr)
-		setup_named_sock(NULL, listen_port, socklist);
-	else {
-		int i, socknum;
-		for (i = 0; i < listen_addr->nr; i++) {
-			socknum = setup_named_sock(listen_addr->items[i].string,
-						   listen_port, socklist);
-
-			if (socknum == 0)
-				logerror("unable to allocate any listen sockets for host %s on port %u",
-					 listen_addr->items[i].string, listen_port);
-		}
-	}
-}
-
-static int service_loop(struct socketlist *socklist)
-{
-	struct pollfd *pfd;
-	int i;
-
-	pfd = xcalloc(socklist->nr, sizeof(struct pollfd));
-
-	for (i = 0; i < socklist->nr; i++) {
-		pfd[i].fd = socklist->list[i];
-		pfd[i].events = POLLIN;
-	}
-
-	signal(SIGCHLD, child_handler);
-
-	for (;;) {
-		int i;
-
-		check_dead_children();
-
-		if (poll(pfd, socklist->nr, -1) < 0) {
-			if (errno != EINTR) {
-				logerror("Poll failed, resuming: %s",
-				      strerror(errno));
-				sleep(1);
-			}
-			continue;
-		}
-
-		for (i = 0; i < socklist->nr; i++) {
-			if (pfd[i].revents & POLLIN) {
-				union {
-					struct sockaddr sa;
-					struct sockaddr_in sai;
-#ifndef NO_IPV6
-					struct sockaddr_in6 sai6;
-#endif
-				} ss;
-				socklen_t sslen = sizeof(ss);
-				int incoming = accept(pfd[i].fd, &ss.sa, &sslen);
-				if (incoming < 0) {
-					switch (errno) {
-					case EAGAIN:
-					case EINTR:
-					case ECONNABORTED:
-						continue;
-					default:
-						die_errno("accept returned");
-					}
-				}
-				handle(incoming, &ss.sa, sslen);
-			}
-		}
-	}
-}
-
-#ifdef NO_POSIX_GOODIES
-
-struct credentials;
-
-static void drop_privileges(struct credentials *cred)
-{
-	/* nothing */
-}
-
-static struct credentials *prepare_credentials(const char *user_name,
-    const char *group_name)
-{
-	die("--user not supported on this platform");
-}
-
-#else
-
-struct credentials {
-	struct passwd *pass;
-	gid_t gid;
-};
-
-static void drop_privileges(struct credentials *cred)
-{
-	if (cred && (initgroups(cred->pass->pw_name, cred->gid) ||
-	    setgid (cred->gid) || setuid(cred->pass->pw_uid)))
-		die("cannot drop privileges");
-}
-
-static struct credentials *prepare_credentials(const char *user_name,
-    const char *group_name)
-{
-	static struct credentials c;
-
-	c.pass = getpwnam(user_name);
-	if (!c.pass)
-		die("user not found - %s", user_name);
-
-	if (!group_name)
-		c.gid = c.pass->pw_gid;
-	else {
-		struct group *group = getgrnam(group_name);
-		if (!group)
-			die("group not found - %s", group_name);
-
-		c.gid = group->gr_gid;
-	}
-
-	return &c;
-}
-#endif
-
-static int serve(struct string_list *listen_addr, int listen_port,
-    struct credentials *cred)
-{
-	struct socketlist socklist = { NULL, 0, 0 };
-
-	socksetup(listen_addr, listen_port, &socklist);
-	if (socklist.nr == 0)
-		die("unable to allocate any listen sockets on port %u",
-		    listen_port);
-
-	drop_privileges(cred);
-
-	loginfo("Ready to rumble");
-
-	return service_loop(&socklist);
-}
-
-int cmd_main(int argc, const char **argv)
-{
-	int listen_port = 0;
-	struct string_list listen_addr = STRING_LIST_INIT_NODUP;
-	int serve_mode = 0, inetd_mode = 0;
-	const char *pid_file = NULL, *user_name = NULL, *group_name = NULL;
-	int detach = 0;
-	struct credentials *cred = NULL;
-	int i;
-
-	for (i = 1; i < argc; i++) {
-		const char *arg = argv[i];
-		const char *v;
-
-		if (skip_prefix(arg, "--listen=", &v)) {
-			string_list_append(&listen_addr, xstrdup_tolower(v));
-			continue;
-		}
-		if (skip_prefix(arg, "--port=", &v)) {
-			char *end;
-			unsigned long n;
-			n = strtoul(v, &end, 0);
-			if (*v && !*end) {
-				listen_port = n;
-				continue;
-			}
-		}
-		if (!strcmp(arg, "--serve")) {
-			serve_mode = 1;
-			continue;
-		}
-		if (!strcmp(arg, "--inetd")) {
-			inetd_mode = 1;
-			continue;
-		}
-		if (!strcmp(arg, "--verbose")) {
-			verbose = 1;
-			continue;
-		}
-		if (!strcmp(arg, "--syslog")) {
-			log_destination = LOG_DESTINATION_SYSLOG;
-			continue;
-		}
-		if (skip_prefix(arg, "--log-destination=", &v)) {
-			if (!strcmp(v, "syslog")) {
-				log_destination = LOG_DESTINATION_SYSLOG;
-				continue;
-			} else if (!strcmp(v, "stderr")) {
-				log_destination = LOG_DESTINATION_STDERR;
-				continue;
-			} else if (!strcmp(v, "none")) {
-				log_destination = LOG_DESTINATION_NONE;
-				continue;
-			} else
-				die("unknown log destination '%s'", v);
-		}
-		if (!strcmp(arg, "--export-all")) {
-			export_all_trees = 1;
-			continue;
-		}
-		if (skip_prefix(arg, "--access-hook=", &v)) {
-			access_hook = v;
-			continue;
-		}
-		if (skip_prefix(arg, "--timeout=", &v)) {
-			timeout = atoi(v);
-			continue;
-		}
-		if (skip_prefix(arg, "--init-timeout=", &v)) {
-			init_timeout = atoi(v);
-			continue;
-		}
-		if (skip_prefix(arg, "--max-connections=", &v)) {
-			max_connections = atoi(v);
-			if (max_connections < 0)
-				max_connections = 0;	        /* unlimited */
-			continue;
-		}
-		if (!strcmp(arg, "--strict-paths")) {
-			strict_paths = 1;
-			continue;
-		}
-		if (skip_prefix(arg, "--base-path=", &v)) {
-			base_path = v;
-			continue;
-		}
-		if (!strcmp(arg, "--base-path-relaxed")) {
-			base_path_relaxed = 1;
-			continue;
-		}
-		if (skip_prefix(arg, "--interpolated-path=", &v)) {
-			interpolated_path = v;
-			continue;
-		}
-		if (!strcmp(arg, "--reuseaddr")) {
-			reuseaddr = 1;
-			continue;
-		}
-		if (!strcmp(arg, "--user-path")) {
-			user_path = "";
-			continue;
-		}
-		if (skip_prefix(arg, "--user-path=", &v)) {
-			user_path = v;
-			continue;
-		}
-		if (skip_prefix(arg, "--pid-file=", &v)) {
-			pid_file = v;
-			continue;
-		}
-		if (!strcmp(arg, "--detach")) {
-			detach = 1;
-			continue;
-		}
-		if (skip_prefix(arg, "--user=", &v)) {
-			user_name = v;
-			continue;
-		}
-		if (skip_prefix(arg, "--group=", &v)) {
-			group_name = v;
-			continue;
-		}
-		if (skip_prefix(arg, "--enable=", &v)) {
-			enable_service(v, 1);
-			continue;
-		}
-		if (skip_prefix(arg, "--disable=", &v)) {
-			enable_service(v, 0);
-			continue;
-		}
-		if (skip_prefix(arg, "--allow-override=", &v)) {
-			make_service_overridable(v, 1);
-			continue;
-		}
-		if (skip_prefix(arg, "--forbid-override=", &v)) {
-			make_service_overridable(v, 0);
-			continue;
-		}
-		if (!strcmp(arg, "--informative-errors")) {
-			informative_errors = 1;
-			continue;
-		}
-		if (!strcmp(arg, "--no-informative-errors")) {
-			informative_errors = 0;
-			continue;
-		}
-		if (!strcmp(arg, "--")) {
-			ok_paths = &argv[i+1];
-			break;
-		} else if (arg[0] != '-') {
-			ok_paths = &argv[i];
-			break;
-		}
-
-		usage(daemon_usage);
-	}
-
-	if (log_destination == LOG_DESTINATION_UNSET) {
-		if (inetd_mode || detach)
-			log_destination = LOG_DESTINATION_SYSLOG;
-		else
-			log_destination = LOG_DESTINATION_STDERR;
-	}
-
-	if (log_destination == LOG_DESTINATION_SYSLOG) {
-		openlog("git-daemon", LOG_PID, LOG_DAEMON);
-		set_die_routine(daemon_die);
-	} else
-		/* avoid splitting a message in the middle */
-		setvbuf(stderr, NULL, _IOFBF, 4096);
-
-	if (inetd_mode && (detach || group_name || user_name))
-		die("--detach, --user and --group are incompatible with --inetd");
-
-	if (inetd_mode && (listen_port || (listen_addr.nr > 0)))
-		die("--listen= and --port= are incompatible with --inetd");
-	else if (listen_port == 0)
-		listen_port = DEFAULT_GIT_PORT;
-
-	if (group_name && !user_name)
-		die("--group supplied without --user");
-
-	if (user_name)
-		cred = prepare_credentials(user_name, group_name);
-
-	if (strict_paths && (!ok_paths || !*ok_paths))
-		die("option --strict-paths requires a whitelist");
-
-	if (base_path && !is_directory(base_path))
-		die("base-path '%s' does not exist or is not a directory",
-		    base_path);
-
-	if (log_destination != LOG_DESTINATION_STDERR) {
-		if (!freopen("/dev/null", "w", stderr))
-			die_errno("failed to redirect stderr to /dev/null");
-	}
-
-	if (inetd_mode || serve_mode)
-		return execute();
-
-	if (detach) {
-		if (daemonize())
-			die("--detach not supported on this platform");
-	}
-
-	if (pid_file)
-		write_file(pid_file, "%"PRIuMAX, (uintmax_t) getpid());
-
-	/* prepare argv for serving-processes */
-	argv_array_push(&cld_argv, argv[0]); /* git-daemon */
-	argv_array_push(&cld_argv, "--serve");
-	for (i = 1; i < argc; ++i)
-		argv_array_push(&cld_argv, argv[i]);
-
-	return serve(&listen_addr, listen_port, cred);
-}