/* -*- c-file-style: "linux"; -*-
-
- Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
- Copyright (C) 2001 by Martin Pool <mbp@samba.org>
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/* the socket based protocol for setting up a connection with rsyncd */
+ *
+ * Copyright (C) 1998-2001 by Andrew Tridgell <tridge@samba.org>
+ * Copyright (C) 2001-2002 by Martin Pool <mbp@samba.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+/**
+ * @file
+ *
+ * The socket based protocol for setting up a connection with
+ * rsyncd.
+ **/
#include "rsync.h"
extern int verbose;
extern int rsync_port;
char *auth_user;
-int sanitize_paths = 0;
+extern int sanitize_paths;
-/*
+/**
* Run a client connected to an rsyncd. The alternative to this
- * function for remote-shell connections is do_cmd.
- */
+ * function for remote-shell connections is do_cmd().
+ *
+ * After initial server startup, hands over to client_run().
+ *
+ * @return -1 for error in startup, or the result of client_run().
+ **/
int start_socket_client(char *host, char *path, int argc, char *argv[])
{
int fd, i;
char *p, *user=NULL;
extern int remote_version;
extern int am_sender;
- extern struct in_addr socket_address;
extern char *shell_cmd;
-
+ extern int list_only;
+ extern int kludge_around_eof;
+ extern char *bind_address;
+ extern int default_af_hint;
+
if (argc == 0 && !am_sender) {
extern int list_only;
list_only = 1;
if (!user) user = getenv("USER");
if (!user) user = getenv("LOGNAME");
- fd = open_socket_out(host, rsync_port, &socket_address);
+ if (verbose >= 2) {
+ /* FIXME: If we're going to use a socket program for
+ * testing, then this message is wrong. We need to
+ * say something like "(except really using %s)" */
+ rprintf(FINFO, "opening tcp connection to %s port %d\n",
+ host, rsync_port);
+ }
+ fd = open_socket_out_wrapped (host, rsync_port, bind_address,
+ default_af_hint);
if (fd == -1) {
exit_cleanup(RERR_SOCKETIO);
}
io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION);
if (!read_line(fd, line, sizeof(line)-1)) {
+ rprintf(FERROR, "rsync: did not see server greeting\n");
return -1;
}
if (sscanf(line,"@RSYNCD: %d", &remote_version) != 1) {
+ /* note that read_line strips of \n or \r */
+ rprintf(FERROR, "rsync: server sent \"%s\" rather than greeting\n",
+ line);
return -1;
}
io_printf(fd,"%s\n",path);
if (p) *p = '/';
+ /* Old servers may just drop the connection here,
+ rather than sending a proper EXIT command. Yuck. */
+ kludge_around_eof = list_only && (remote_version < 25);
+
while (1) {
if (!read_line(fd, line, sizeof(line)-1)) {
+ rprintf(FERROR, "rsync: didn't get server startup line\n");
return -1;
}
}
if (strcmp(line,"@RSYNCD: OK") == 0) break;
- rprintf(FINFO,"%s\n", line);
+
+ if (strcmp(line,"@RSYNCD: EXIT") == 0) {
+ /* This is sent by recent versions of the
+ * server to terminate the listing of modules.
+ * We don't want to go on and transfer
+ * anything; just exit. */
+ exit(0);
+ }
+
+ if (strncmp(line, "@ERROR", 6) == 0)
+ rprintf(FERROR,"%s\n", line);
+ else
+ rprintf(FINFO,"%s\n", line);
}
+ kludge_around_eof = False;
for (i=0;i<sargc;i++) {
io_printf(fd,"%s\n", sargs[i]);
if (!allow_access(addr, host, lp_hosts_allow(i), lp_hosts_deny(i))) {
rprintf(FERROR,"rsync denied on module %s from %s (%s)\n",
- name, client_name(fd), client_addr(fd));
+ name, host, addr);
io_printf(fd,"@ERROR: access denied to %s from %s (%s)\n",
- name, client_name(fd), client_addr(fd));
+ name, host, addr);
return -1;
}
log_init();
if (use_chroot) {
+ /*
+ * XXX: The 'use chroot' flag is a fairly reliable
+ * source of confusion, because it fails under two
+ * important circumstances: running as non-root,
+ * running on Win32 (or possibly others). On the
+ * other hand, if you are running as root, then it
+ * might be better to always use chroot.
+ *
+ * So, perhaps if we can't chroot we should just issue
+ * a warning, unless a "require chroot" flag is set,
+ * in which case we fail.
+ */
if (chroot(lp_path(i))) {
rsyserr(FERROR, errno, "chroot %s failed", lp_path(i));
io_printf(fd,"@ERROR: chroot failed\n");
}
if (am_root) {
+#ifdef HAVE_SETGROUPS
+ /* Get rid of any supplementary groups this process
+ * might have inheristed. */
+ if (setgroups(0, NULL)) {
+ rsyserr(FERROR, errno, "setgroups failed");
+ io_printf(fd, "@ERROR: setgroups failed\n");
+ return -1;
+ }
+#endif
+
+ /* XXXX: You could argue that if the daemon is started
+ * by a non-root user and they explicitly specify a
+ * gid, then we should try to change to that gid --
+ * this could be possible if it's already in their
+ * supplementary groups. */
+
+ /* TODO: Perhaps we need to document that if rsyncd is
+ * started by somebody other than root it will inherit
+ * all their supplementary groups. */
+
if (setgid(gid)) {
- rsyserr(FERROR, errno, "setgid %d failed", gid);
+ rsyserr(FERROR, errno, "setgid %d failed", (int) gid);
io_printf(fd,"@ERROR: setgid failed\n");
return -1;
}
if (setuid(uid)) {
- rsyserr(FERROR, errno, "setuid %d failed", uid);
+ rsyserr(FERROR, errno, "setuid %d failed", (int) uid);
io_printf(fd,"@ERROR: setuid failed\n");
return -1;
}
{
int n = lp_numservices();
int i;
-
+ extern int remote_version;
+
for (i=0;i<n;i++)
if (lp_list(i))
io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i));
+
+ if (remote_version >= 25)
+ io_printf(fd,"@RSYNCD: EXIT\n");
}
/* this is called when a socket connection is established to a client
extern char *config_file;
extern int orig_umask;
char *pid_file;
+ extern int no_detach;
if (is_a_socket(STDIN_FILENO)) {
int i;
return start_daemon(STDIN_FILENO);
}
- become_daemon();
+ if (!no_detach)
+ become_daemon();
if (!lp_load(config_file, 1)) {
exit_cleanup(RERR_SYNTAX);
log_init();
- rprintf(FINFO, "rsyncd version %s starting, listening on port %d\n", VERSION,
+ rprintf(FINFO, "rsyncd version %s starting, listening on port %d\n",
+ RSYNC_VERSION,
rsync_port);
/* TODO: If listening on a particular address, then show that
- * address too. */
+ * address too. In fact, why not just do inet_ntop on the
+ * local address??? */
if (((pid_file = lp_pid_file()) != NULL) && (*pid_file != '\0')) {
char pidbuf[16];
rsyserr(FLOG, errno, "failed to create pid file %s", pid_file);
exit_cleanup(RERR_FILEIO);
}
- slprintf(pidbuf, sizeof(pidbuf), "%d\n", pid);
+ snprintf(pidbuf, sizeof(pidbuf), "%d\n", pid);
write(fd, pidbuf, strlen(pidbuf));
close(fd);
}
git.samba.org / rsync.git / blobdiff