X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/7b372642ec1179dece1b0b0162189112b85018bf..8638dd48f71023642d3af282250bbe157ee9b67d:/clientserver.c

diff --git a/clientserver.c b/clientserver.c
index 765cba7e..debc4fec 100644
--- a/clientserver.c
+++ b/clientserver.c
@@ -33,6 +33,13 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 	char line[MAXPATHLEN];
 	char *p, *user=NULL;
 	extern int remote_version;
+	extern int am_client;
+	extern int am_sender;
+
+	if (*path == '/') {
+		rprintf(FERROR,"ERROR: The remote path must start with a module name\n");
+		return -1;
+	}
 
 	p = strchr(host, '@');
 	if (p) {
@@ -44,6 +51,8 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 	if (!user) user = getenv("USER");
 	if (!user) user = getenv("LOGNAME");
 
+	am_client = 1;
+
 	fd = open_socket_out(host, rsync_port);
 	if (fd == -1) {
 		exit_cleanup(1);
@@ -92,6 +101,9 @@ int start_socket_client(char *host, char *path, int argc, char *argv[])
 	}
 	io_printf(fd,"\n");
 
+	if (remote_version > 17 && !am_sender)
+		io_start_multiplex_in(fd);
+
 	return client_run(fd, fd, -1, argc, argv);
 }
 
@@ -109,9 +121,14 @@ static int rsync_module(int fd, int i)
 	char *addr = client_addr(fd);
 	char *host = client_name(fd);
 	char *name = lp_name(i);
+	char *user;
+	int use_chroot = lp_use_chroot(i);
 	int start_glob=0;
+	int ret;
 	char *request=NULL;
 	extern int am_sender;
+	extern int remote_version;
+	extern int am_root;
 
 	if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
 		rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
@@ -121,21 +138,30 @@ static int rsync_module(int fd, int i)
 		return -1;
 	}
 
-	if (!auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ")) {
+	if (!claim_connection(lp_lock_file(), lp_max_connections())) {
+		if (errno) {
+			rprintf(FERROR,"failed to open lock file %s : %s\n",
+				lp_lock_file(), strerror(errno));
+			io_printf(fd,"@ERROR: failed to open lock file %s : %s\n",
+				  lp_lock_file(), strerror(errno));
+		} else {
+			rprintf(FERROR,"max connections (%d) reached\n",
+				lp_max_connections());
+			io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections());
+		}
+		return -1;
+	}
+
+	
+	user = auth_server(fd, i, addr, "@RSYNCD: AUTHREQD ");
+
+	if (!user) {
 		rprintf(FERROR,"auth failed on module %s from %s (%s)\n",
 			name, client_name(fd), client_addr(fd));
 		io_printf(fd,"@ERROR: auth failed on module %s\n",name);
 		return -1;		
 	}
 
-	if (!claim_connection(lp_lock_file(), lp_max_connections())) {
-		rprintf(FERROR,"max connections (%d) reached\n",
-			lp_max_connections());
-		io_printf(fd,"@ERROR: max connections (%d) reached - try again later\n", lp_max_connections());
-		return -1;
-	}
-
-	
 	module_id = i;
 
 	if (lp_read_only(i))
@@ -162,37 +188,48 @@ static int rsync_module(int fd, int i)
 	}
 
 	p = lp_exclude_from(i);
-	add_exclude_file(p, 1);
+	add_exclude_file(p, 1, 0);
 
 	p = lp_exclude(i);
 	add_exclude_line(p);
 
 	log_open();
 
-	if (chroot(lp_path(i))) {
-		rprintf(FERROR,"chroot %s failed\n", lp_path(i));
-		io_printf(fd,"@ERROR: chroot failed\n");
-		return -1;
-	}
+	if (use_chroot) {
+		if (chroot(lp_path(i))) {
+			rprintf(FERROR,"chroot %s failed\n", lp_path(i));
+			io_printf(fd,"@ERROR: chroot failed\n");
+			return -1;
+		}
 
-	if (chdir("/")) {
-		rprintf(FERROR,"chdir %s failed\n", lp_path(i));
-		io_printf(fd,"@ERROR: chdir failed\n");
-		return -1;
-	}
+		if (chdir("/")) {
+			rprintf(FERROR,"chdir %s failed\n", lp_path(i));
+			io_printf(fd,"@ERROR: chdir failed\n");
+			return -1;
+		}
 
-	if (setgid(gid) || getgid() != gid) {
-		rprintf(FERROR,"setgid %d failed\n", gid);
-		io_printf(fd,"@ERROR: setgid failed\n");
-		return -1;
-	}
+		if (setgid(gid) || getgid() != gid) {
+			rprintf(FERROR,"setgid %d failed\n", gid);
+			io_printf(fd,"@ERROR: setgid failed\n");
+			return -1;
+		}
 
-	if (setuid(uid) || getuid() != uid) {
-		rprintf(FERROR,"setuid %d failed\n", uid);
-		io_printf(fd,"@ERROR: setuid failed\n");
-		return -1;
+		if (setuid(uid) || getuid() != uid) {
+			rprintf(FERROR,"setuid %d failed\n", uid);
+			io_printf(fd,"@ERROR: setuid failed\n");
+			return -1;
+		}
+
+	} else {
+		if (!push_dir(lp_path(i), 0)) {
+			rprintf(FERROR,"chdir %s failed\n", lp_path(i));
+			io_printf(fd,"@ERROR: chdir failed\n");
+			return -1;
+		}
 	}
 
+	am_root = (getuid() == 0);
+
 	io_printf(fd,"@RSYNCD: OK\n");
 
 	argv[argc++] = "rsyncd";
@@ -230,22 +267,53 @@ static int rsync_module(int fd, int i)
 		}
 	}
 
-	parse_arguments(argc, argv);
+	if (!use_chroot) {
+		/*
+		 * Note that this is applied to all parameters, whether or not
+		 *    they are filenames, but no other legal parameters contain
+		 *    the forms that need to be sanitized so it doesn't hurt;
+		 *    it is not known at this point which parameters are files
+		 *    and which aren't.
+		 */
+		for (i = 1; i < argc; i++) {
+			char *copy = sanitize_path(argv[i]);
+			free((void *)argv[i]);
+			argv[i] = copy;
+		}
+	}
+
+	ret = parse_arguments(argc, argv);
 
 	if (request) {
-		rprintf(FINFO,"rsync %s %s from %s (%s)\n",
-			am_sender?"on":"to",
-			request, host, addr);
+		if (*user) {
+			rprintf(FINFO,"rsync %s %s from %s@%s (%s)\n",
+				am_sender?"on":"to",
+				request, user, host, addr);
+		} else {
+			rprintf(FINFO,"rsync %s %s from %s (%s)\n",
+				am_sender?"on":"to",
+				request, host, addr);
+		}
 		free(request);
 	}
 
+#if !TRIDGE
 	/* don't allow the logs to be flooded too fast */
 	if (verbose > 1) verbose = 1;
+#endif
 
 	argc -= optind;
 	argp = argv + optind;
 	optind = 0;
 
+	if (remote_version > 17 && am_sender)
+		io_start_multiplex_out(fd);
+
+	if (!ret) {
+		rprintf(FERROR,"Error parsing options (unsupported option?) - aborting\n");
+		exit_cleanup(1);
+	}
+
 	start_server(fd, fd, argc, argp);
 
 	return 0;
@@ -338,9 +406,26 @@ static int start_daemon(int fd)
 int daemon_main(void)
 {
 	extern char *config_file;
+	char *pid_file;
+
+	/* this ensures that we don't call getcwd after the chroot,
+           which doesn't work on platforms that use popen("pwd","r")
+           for getcwd */
+	push_dir("/", 0);
 
 	if (is_a_socket(STDIN_FILENO)) {
-		/* we are running via inetd */
+		int i;
+
+		/* we are running via inetd - close off stdout and
+		   stderr so that library functions (and getopt) don't
+		   try to use them. Redirect them to /dev/null */
+		for (i=1;i<3;i++) {
+			close(i); 
+			open("/dev/null", O_RDWR);
+		}
+
+		set_nonblocking(STDIN_FILENO);
+
 		return start_daemon(STDIN_FILENO);
 	}
 
@@ -355,6 +440,19 @@ int daemon_main(void)
 
 	rprintf(FINFO,"rsyncd version %s starting\n",VERSION);
 
+	if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
+		FILE *f;
+		int pid = (int) getpid();
+		cleanup_set_pid(pid);
+		if ((f = fopen(lp_pid_file(), "w")) == NULL) {
+		    cleanup_set_pid(0);
+		    fprintf(stderr,"failed to create pid file %s\n", pid_file);
+		    exit_cleanup(1);
+		}
+		fprintf(f, "%d\n", pid);
+		fclose(f);
+	}
+
 	start_accept_loop(rsync_port, start_daemon);
 	return -1;
 }