Commit | Line | Data |
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3591c066 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1998 | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
17 | */ | |
18 | ||
19 | /* the socket based protocol for setting up a connection wit rsyncd */ | |
20 | ||
21 | #include "rsync.h" | |
22 | ||
23 | extern int module_id; | |
24 | extern int read_only; | |
25 | extern int verbose; | |
26 | extern int rsync_port; | |
27 | ||
28 | int start_socket_client(char *host, char *path, int argc, char *argv[]) | |
29 | { | |
30 | int fd, i; | |
31 | char *sargs[MAX_ARGS]; | |
32 | int sargc=0; | |
33 | char line[1024]; | |
34 | char *p; | |
35 | int version; | |
36 | ||
37 | fd = open_socket_out(host, rsync_port); | |
38 | if (fd == -1) { | |
39 | exit_cleanup(1); | |
40 | } | |
41 | ||
42 | server_options(sargs,&sargc); | |
43 | ||
44 | sargs[sargc++] = "."; | |
45 | ||
46 | if (path && *path) | |
47 | sargs[sargc++] = path; | |
48 | ||
49 | sargs[sargc] = NULL; | |
50 | ||
51 | p = strchr(path,'/'); | |
52 | if (p) *p = 0; | |
53 | io_printf(fd,"%s\n",path); | |
54 | if (p) *p = '/'; | |
55 | ||
56 | if (!read_line(fd, line, sizeof(line)-1)) { | |
57 | return -1; | |
58 | } | |
59 | ||
60 | if (sscanf(line,"@RSYNCD: %d", &version) != 1) { | |
61 | return -1; | |
62 | } | |
63 | ||
64 | while (1) { | |
65 | if (!read_line(fd, line, sizeof(line)-1)) { | |
66 | return -1; | |
67 | } | |
68 | if (strcmp(line,"@RSYNCD: OK") == 0) break; | |
69 | rprintf(FINFO,"%s\n", line); | |
70 | } | |
71 | ||
72 | for (i=0;i<sargc;i++) { | |
73 | io_printf(fd,"%s\n", sargs[i]); | |
74 | } | |
75 | io_printf(fd,"\n"); | |
76 | ||
77 | #if 0 | |
78 | while (1) { | |
79 | if (!read_line(fd, line, sizeof(line)-1)) { | |
80 | return -1; | |
81 | } | |
82 | rprintf(FINFO,"%s\n", line); | |
83 | } | |
84 | #endif | |
85 | ||
86 | return client_run(fd, fd, -1, argc, argv); | |
87 | } | |
88 | ||
89 | ||
90 | ||
91 | static int rsync_module(int fd, int i) | |
92 | { | |
93 | int argc=0; | |
94 | char *argv[MAX_ARGS]; | |
95 | char **argp; | |
96 | char line[1024]; | |
97 | ||
98 | module_id = i; | |
99 | ||
100 | if (lp_read_only(i)) | |
101 | read_only = 1; | |
102 | ||
103 | rprintf(FERROR,"rsyncd starting\n"); | |
104 | ||
105 | if (chroot(lp_path(i))) { | |
106 | io_printf(fd,"@ERROR: chroot failed\n"); | |
107 | return -1; | |
108 | } | |
109 | ||
110 | if (chdir("/")) { | |
111 | io_printf(fd,"@ERROR: chdir failed\n"); | |
112 | return -1; | |
113 | } | |
114 | ||
115 | if (setgid(lp_gid(i))) { | |
116 | io_printf(fd,"@ERROR: setgid failed\n"); | |
117 | return -1; | |
118 | } | |
119 | ||
120 | if (setuid(lp_uid(i))) { | |
121 | io_printf(fd,"@ERROR: setuid failed\n"); | |
122 | return -1; | |
123 | } | |
124 | ||
125 | io_printf(fd,"@RSYNCD: OK\n"); | |
126 | ||
127 | argv[argc++] = "rsyncd"; | |
128 | ||
129 | while (1) { | |
130 | if (!read_line(fd, line, sizeof(line)-1)) { | |
131 | return -1; | |
132 | } | |
133 | ||
134 | if (!*line) break; | |
135 | ||
136 | argv[argc] = strdup(line); | |
137 | if (!argv[argc]) { | |
138 | return -1; | |
139 | } | |
140 | ||
141 | argc++; | |
142 | if (argc == MAX_ARGS) { | |
143 | return -1; | |
144 | } | |
145 | } | |
146 | ||
147 | parse_arguments(argc, argv); | |
148 | ||
149 | /* don't allow the logs to be flooded too fast */ | |
150 | if (verbose > 1) verbose = 1; | |
151 | ||
152 | argc -= optind; | |
153 | argp = argv + optind; | |
154 | optind = 0; | |
155 | ||
156 | start_server(fd, fd, argc, argp); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | static void send_listing(int fd) | |
162 | { | |
163 | int n = lp_numservices(); | |
164 | int i; | |
165 | ||
166 | for (i=0;i<n;i++) | |
167 | if (lp_list(i)) | |
168 | io_printf(fd, "%-15s\t%s\n", lp_name(i), lp_comment(i)); | |
169 | } | |
170 | ||
171 | /* this is called when a socket connection is established to a client | |
172 | and we want to start talking. The setup of the system is done from | |
173 | here */ | |
174 | static int start_daemon(int fd) | |
175 | { | |
176 | char line[1024]; | |
177 | char *motd; | |
178 | ||
179 | set_socket_options(fd,"SO_KEEPALIVE"); | |
180 | ||
181 | io_printf(fd,"@RSYNCD: %d\n", PROTOCOL_VERSION); | |
182 | ||
183 | motd = lp_motd_file(); | |
184 | if (*motd) { | |
185 | FILE *f = fopen(motd,"r"); | |
186 | while (f && !feof(f)) { | |
187 | int len = fread(line, 1, sizeof(line)-1, f); | |
188 | if (len > 0) { | |
189 | line[len] = 0; | |
190 | io_printf(fd,"%s", line); | |
191 | } | |
192 | } | |
193 | if (f) fclose(f); | |
194 | io_printf(fd,"\n"); | |
195 | } | |
196 | ||
197 | /* read a single line indicating the resource that is wanted */ | |
198 | while (1) { | |
199 | int i; | |
200 | ||
201 | line[0] = 0; | |
202 | if (!read_line(fd, line, sizeof(line)-1)) { | |
203 | return -1; | |
204 | } | |
205 | ||
206 | if (!*line || strcmp(line,"#list")==0) { | |
207 | send_listing(fd); | |
208 | return -1; | |
209 | } | |
210 | ||
211 | if (*line == '#') { | |
212 | /* it's some sort of command that I don't understand */ | |
213 | io_printf(fd,"ERROR: Unknown command '%s'\n", line); | |
214 | return -1; | |
215 | } | |
216 | ||
217 | i = lp_number(line); | |
218 | if (i == -1) { | |
219 | io_printf(fd,"ERROR: Unknown module '%s'\n", line); | |
220 | return -1; | |
221 | } | |
222 | ||
223 | return rsync_module(fd, i); | |
224 | } | |
225 | ||
226 | return 0; | |
227 | } | |
228 | ||
229 | ||
230 | int daemon_main(void) | |
231 | { | |
232 | if (!lp_load(RSYNCD_CONF)) { | |
233 | exit_cleanup(1); | |
234 | } | |
235 | ||
236 | if (is_a_socket(STDIN_FILENO)) { | |
237 | /* we are running via inetd */ | |
238 | return start_daemon(STDIN_FILENO); | |
239 | } | |
240 | ||
241 | become_daemon(); | |
242 | ||
243 | return start_accept_loop(rsync_port, start_daemon); | |
244 | } | |
245 |