-/* -*- c-file-style: "linux"; -*-
+/*
+ * 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>
+ * Copyright (C) 1998-2001 Andrew Tridgell <tridge@samba.org>
+ * Copyright (C) 2001-2002 Martin Pool <mbp@samba.org>
+ * Copyright (C) 2002-2007 Wayne Davison
*
* 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
+ * the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* 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.
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, visit the http://fsf.org website.
*/
-/**
- * @file
- *
- * The socket based protocol for setting up a connection with
- * rsyncd.
- **/
-
#include "rsync.h"
extern int verbose;
+extern int quiet;
+extern int output_motd;
extern int list_only;
extern int am_sender;
extern int am_server;
extern int am_daemon;
extern int am_root;
extern int rsync_port;
+extern int ignore_errors;
extern int kluge_around_eof;
extern int daemon_over_rsh;
extern int sanitize_paths;
extern int remote_protocol;
extern int protocol_version;
extern int io_timeout;
-extern int orig_umask;
extern int no_detach;
extern int default_af_hint;
+extern int logfile_format_has_i;
+extern int logfile_format_has_o_or_i;
+extern mode_t orig_umask;
extern char *bind_address;
-extern struct filter_list_struct server_filter_list;
+extern char *sockopts;
extern char *config_file;
+extern char *logfile_format;
extern char *files_from;
extern char *tmpdir;
+extern struct chmod_mode_struct *chmod_modes;
+extern struct filter_list_struct server_filter_list;
+extern char curr_dir[];
char *auth_user;
int read_only = 0;
-int daemon_log_format_has_i = 0;
-int daemon_log_format_has_o_or_i = 0;
int module_id = -1;
+struct chmod_mode_struct *daemon_chmod_modes;
-/* Length of lp_path() string when in daemon mode & not chrooted, else 0. */
+/* module_dirlen is the length of the module_dir string when in daemon
+ * mode, not chrooted, and the path is not "/"; otherwise 0. */
+char *module_dir = NULL;
unsigned int module_dirlen = 0;
+#ifdef HAVE_SIGACTION
+static struct sigaction sigact;
+#endif
+
/**
* Run a client connected to an rsyncd. The alternative to this
* function for remote-shell connections is do_cmd().
if (fd == -1)
exit_cleanup(RERR_SOCKETIO);
+ set_socket_options(fd, sockopts);
+
ret = start_inband_exchange(user, path, fd, fd, argc);
return ret ? ret : client_run(fd, fd, -1, argc, argv);
}
-int start_inband_exchange(char *user, char *path, int f_in, int f_out,
+int start_inband_exchange(const char *user, char *path, int f_in, int f_out,
int argc)
{
int i;
return -1;
}
- rprintf(FINFO, "%s\n", line);
+ /* This might be a MOTD line or a module listing, but there is
+ * no way to differentiate it. The manpage mentions this. */
+ if (output_motd)
+ rprintf(FINFO, "%s\n", line);
}
kluge_around_eof = 0;
if (wait_process(pid, &status, 0) < 0
|| !WIFEXITED(status) || WEXITSTATUS(status) != 0) {
char *e;
- if (asprintf(&e, "pre-xfer exec returned failure (%d)\n", status) < 0)
+ if (asprintf(&e, "pre-xfer exec returned failure (%d)%s%s\n",
+ status, status < 0 ? ": " : "",
+ status < 0 ? strerror(errno) : "") < 0)
out_of_memory("finish_pre_exec");
return e;
}
return bp - buf;
}
-static int rsync_module(int f_in, int f_out, int i)
+static int rsync_module(int f_in, int f_out, int i, char *addr, char *host)
{
int argc = 0;
int maxargs;
uid_t uid = (uid_t)-2; /* canonically "nobody" */
gid_t gid = (gid_t)-2;
char *p, *err_msg = NULL;
- char *addr = client_addr(f_in);
- char *host = client_name(f_in);
char *name = lp_name(i);
int use_chroot = lp_use_chroot(i);
int start_glob = 0;
if (!claim_connection(lp_lock_file(i), lp_max_connections(i))) {
if (errno) {
rsyserr(FLOG, errno, "failed to open lock file %s",
- safe_fname(lp_lock_file(i)));
+ lp_lock_file(i));
io_printf(f_out, "@ERROR: failed to open lock file\n");
} else {
rprintf(FLOG, "max connections (%d) reached\n",
if (lp_read_only(i))
read_only = 1;
- if (lp_transfer_logging(i)) {
- if (log_format_has(lp_log_format(i), 'i'))
- daemon_log_format_has_i = 1;
- if (daemon_log_format_has_i
- || log_format_has(lp_log_format(i), 'o'))
- daemon_log_format_has_o_or_i = 1;
- }
+ if (lp_transfer_logging(i) && !logfile_format)
+ logfile_format = lp_log_format(i);
+ if (log_format_has(logfile_format, 'i'))
+ logfile_format_has_i = 1;
+ if (logfile_format_has_i || log_format_has(logfile_format, 'o'))
+ logfile_format_has_o_or_i = 1;
am_root = (MY_UID() == 0);
if (am_root) {
p = lp_uid(i);
if (!name_to_uid(p, &uid)) {
- if (!isdigit(*(unsigned char *)p)) {
+ if (!isDigit(p)) {
rprintf(FLOG, "Invalid uid %s\n", p);
io_printf(f_out, "@ERROR: invalid uid %s\n", p);
return -1;
p = lp_gid(i);
if (!name_to_gid(p, &gid)) {
- if (!isdigit(*(unsigned char *)p)) {
+ if (!isDigit(p)) {
rprintf(FLOG, "Invalid gid %s\n", p);
io_printf(f_out, "@ERROR: invalid gid %s\n", p);
return -1;
/* TODO: Perhaps take a list of gids, and make them into the
* supplementary groups. */
- if (use_chroot || (module_dirlen = strlen(lp_path(i))) == 1) {
+ /* We do a push_dir() without actually calling chdir() in order
+ * to make sure that the module's path is absolute. After this
+ * check, module_dir will be set to an absolute path. */
+ module_dir = lp_path(i);
+ strlcpy(line, curr_dir, sizeof line);
+ if (!push_dir(module_dir, 1))
+ goto chdir_failed;
+ if (strcmp(curr_dir, module_dir) != 0)
+ module_dir = strdup(curr_dir);
+ push_dir(line, 1); /* Restore curr_dir. */
+
+ if (use_chroot || (module_dirlen = strlen(module_dir)) == 1) {
module_dirlen = 0;
set_filter_dir("/", 1);
} else
- set_filter_dir(lp_path(i), module_dirlen);
+ set_filter_dir(module_dir, module_dirlen);
p = lp_filter(i);
parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
parse_rule(&server_filter_list, p, MATCHFLG_WORD_SPLIT,
XFLG_ABS_IF_SLASH | XFLG_OLD_PREFIXES);
- log_init();
+ log_init(1);
#ifdef HAVE_PUTENV
if (*lp_prexfer_exec(i) || *lp_postxfer_exec(i)) {
char *modname, *modpath, *hostaddr, *hostname, *username;
int status;
if (asprintf(&modname, "RSYNC_MODULE_NAME=%s", name) < 0
- || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", lp_path(i)) < 0
+ || asprintf(&modpath, "RSYNC_MODULE_PATH=%s", module_dir) < 0
|| asprintf(&hostaddr, "RSYNC_HOST_ADDR=%s", addr) < 0
|| asprintf(&hostname, "RSYNC_HOST_NAME=%s", host) < 0
|| asprintf(&username, "RSYNC_USER_NAME=%s", auth_user) < 0)
return -1;
}
if (pid) {
- char *ret1, *ret2;
+ if (asprintf(&p, "RSYNC_PID=%ld", (long)pid) > 0)
+ putenv(p);
if (wait_process(pid, &status, 0) < 0)
status = -1;
- if (asprintf(&ret1, "RSYNC_RAW_STATUS=%d", status) > 0)
- putenv(ret1);
+ if (asprintf(&p, "RSYNC_RAW_STATUS=%d", status) > 0)
+ putenv(p);
if (WIFEXITED(status))
status = WEXITSTATUS(status);
else
status = -1;
- if (asprintf(&ret2, "RSYNC_EXIT_STATUS=%d", status) > 0)
- putenv(ret2);
+ if (asprintf(&p, "RSYNC_EXIT_STATUS=%d", status) > 0)
+ putenv(p);
system(lp_postxfer_exec(i));
_exit(status);
}
* send us the user's request via a pipe. */
if (*lp_prexfer_exec(i)) {
int fds[2];
+ if (asprintf(&p, "RSYNC_PID=%ld", (long)getpid()) > 0)
+ putenv(p);
if (pipe(fds) < 0 || (pre_exec_pid = fork()) < 0) {
rsyserr(FLOG, errno, "pre-xfer exec preparation failed");
io_printf(f_out, "@ERROR: pre-xfer exec preparation failed\n");
len = read_arg_from_pipe(fds[0], buf, BIGPATHBUFLEN);
if (len <= 0)
_exit(1);
- if (asprintf(&p, "RSYNC_REQUEST=%s", buf) < 0)
- out_of_memory("rsync_module");
- putenv(p);
+ if (asprintf(&p, "RSYNC_REQUEST=%s", buf) > 0)
+ putenv(p);
for (j = 0; ; j++) {
len = read_arg_from_pipe(fds[0], buf,
BIGPATHBUFLEN);
break;
_exit(1);
}
- if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) < 0)
- out_of_memory("rsync_module");
- putenv(p);
+ if (asprintf(&p, "RSYNC_ARG%d=%s", j, buf) > 0)
+ putenv(p);
}
close(fds[0]);
close(STDIN_FILENO);
* a warning, unless a "require chroot" flag is set,
* in which case we fail.
*/
- if (chroot(lp_path(i))) {
- rsyserr(FLOG, errno, "chroot %s failed",
- safe_fname(lp_path(i)));
+ if (chroot(module_dir)) {
+ rsyserr(FLOG, errno, "chroot %s failed", module_dir);
io_printf(f_out, "@ERROR: chroot failed\n");
return -1;
}
-
- if (!push_dir("/")) {
- rsyserr(FLOG, errno, "chdir %s failed\n",
- safe_fname(lp_path(i)));
- io_printf(f_out, "@ERROR: chdir failed\n");
- return -1;
- }
-
+ if (!push_dir("/", 0))
+ goto chdir_failed;
} else {
- if (!push_dir(lp_path(i))) {
- rsyserr(FLOG, errno, "chdir %s failed\n",
- safe_fname(lp_path(i)));
+ if (!push_dir(module_dir, 0)) {
+ chdir_failed:
+ rsyserr(FLOG, errno, "chdir %s failed\n", module_dir);
io_printf(f_out, "@ERROR: chdir failed\n");
return -1;
}
verbose = 0; /* future verbosity is controlled by client options */
ret = parse_arguments(&argc, (const char ***) &argv, 0);
+ am_server = 1; /* Don't let someone try to be tricky. */
+ if (lp_ignore_errors(module_id))
+ ignore_errors = 1;
+
+ if (lp_fake_super(i))
+ am_root = -1;
+ else if (am_root < 0) /* Treat --fake-super from client as --super. */
+ am_root = 2;
if (filesfrom_fd == 0)
filesfrom_fd = f_in;
if (!ret || err_msg) {
if (err_msg)
- rprintf(FERROR, err_msg);
+ rwrite(FERROR, err_msg, strlen(err_msg), 0);
else
option_error();
msleep(400);
if (lp_timeout(i) && lp_timeout(i) > io_timeout)
set_io_timeout(lp_timeout(i));
+ /* If we have some incoming/outgoing chmod changes, append them to
+ * any user-specified changes (making our changes have priority).
+ * We also get a pointer to just our changes so that a receiver
+ * process can use them separately if --perms wasn't specified. */
+ if (am_sender)
+ p = lp_outgoing_chmod(i);
+ else
+ p = lp_incoming_chmod(i);
+ if (*p && !(daemon_chmod_modes = parse_chmod(p, &chmod_modes))) {
+ rprintf(FLOG, "Invalid \"%sing chmod\" directive: %s\n",
+ am_sender ? "outgo" : "incom", p);
+ }
+
start_server(f_in, f_out, argc, argv);
return 0;
int start_daemon(int f_in, int f_out)
{
char line[1024];
- char *motd;
+ char *motd, *addr, *host;
int i;
io_set_sock_fds(f_in, f_out);
+ /* We must load the config file before calling any function that
+ * might cause log-file output to occur. This ensures that the
+ * "log file" param gets honored for the 2 non-forked use-cases
+ * (when rsync is run by init and run by a remote shell). */
if (!lp_load(config_file, 0))
exit_cleanup(RERR_SYNTAX);
- log_init();
+ addr = client_addr(f_in);
+ host = client_name(f_in);
+ rprintf(FLOG, "connect from %s (%s)\n", host, addr);
if (!am_server) {
set_socket_options(f_in, "SO_KEEPALIVE");
- set_socket_options(f_in, lp_socket_options());
+ if (sockopts)
+ set_socket_options(f_in, sockopts);
+ else
+ set_socket_options(f_in, lp_socket_options());
set_nonblocking(f_in);
}
return -1;
if (!*line || strcmp(line, "#list") == 0) {
+ rprintf(FLOG, "module-list request from %s (%s)\n",
+ host, addr);
send_listing(f_out);
return -1;
}
}
if ((i = lp_number(line)) < 0) {
- char *addr = client_addr(f_in);
- char *host = client_name(f_in);
rprintf(FLOG, "unknown module '%s' tried from %s (%s)\n",
line, host, addr);
io_printf(f_out, "@ERROR: Unknown module '%s'\n", line);
return -1;
}
- return rsync_module(f_in, f_out, i);
+#ifdef HAVE_SIGACTION
+ sigact.sa_flags = SA_NOCLDSTOP;
+#endif
+ SIGACTION(SIGCHLD, remember_children);
+
+ return rsync_module(f_in, f_out, i, addr, host);
}
int daemon_main(void)
if (bind_address == NULL && *lp_bind_address())
bind_address = lp_bind_address();
- log_init();
+ log_init(0);
rprintf(FLOG, "rsyncd version %s starting, listening on port %d\n",
RSYNC_VERSION, rsync_port);
0666 & ~orig_umask)) == -1) {
cleanup_set_pid(0);
rsyserr(FLOG, errno, "failed to create pid file %s",
- safe_fname(pid_file));
+ pid_file);
exit_cleanup(RERR_FILEIO);
}
snprintf(pidbuf, sizeof pidbuf, "%ld\n", (long)pid);
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff