1 |
/*----------------------------------------------------------------------* |
2 |
* File: rxvtd.C |
3 |
*----------------------------------------------------------------------* |
4 |
* |
5 |
* All portions of code are copyright by their respective author/s. |
6 |
* Copyright (c) 2003-2006 Marc Lehmann <pcg@goof.com> |
7 |
* |
8 |
* This program is free software; you can redistribute it and/or modify |
9 |
* it under the terms of the GNU General Public License as published by |
10 |
* the Free Software Foundation; either version 2 of the License, or |
11 |
* (at your option) any later version. |
12 |
* |
13 |
* This program is distributed in the hope that it will be useful, |
14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 |
* GNU General Public License for more details. |
17 |
* |
18 |
* You should have received a copy of the GNU General Public License |
19 |
* along with this program; if not, write to the Free Software |
20 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 |
*----------------------------------------------------------------------*/ |
22 |
|
23 |
#include "../config.h" |
24 |
#include <cstdio> |
25 |
#include <cstdlib> |
26 |
#include <cstdarg> |
27 |
#include <cstring> |
28 |
|
29 |
#include <unistd.h> |
30 |
#include <fcntl.h> |
31 |
#include <sys/types.h> |
32 |
#include <sys/stat.h> |
33 |
#include <sys/socket.h> |
34 |
#include <sys/un.h> |
35 |
|
36 |
#include <cerrno> |
37 |
|
38 |
#include "rxvt.h" |
39 |
#include "rxvtdaemon.h" |
40 |
#include "libptytty.h" |
41 |
#include "iom.h" |
42 |
|
43 |
struct server : rxvt_connection { |
44 |
log_callback log_cb; |
45 |
getfd_callback getfd_cb; |
46 |
|
47 |
void read_cb (io_watcher &w, short revents); io_watcher read_ev; |
48 |
void log_msg (const char *msg); |
49 |
int getfd (int remote_fd); |
50 |
|
51 |
server (int fd) |
52 |
: read_ev (this, &server::read_cb), |
53 |
log_cb (this, &server::log_msg), |
54 |
getfd_cb (this, &server::getfd) |
55 |
{ |
56 |
this->fd = fd; |
57 |
read_ev.start (fd, EVENT_READ); |
58 |
} |
59 |
|
60 |
void err (const char *format = 0, ...); |
61 |
}; |
62 |
|
63 |
struct unix_listener { |
64 |
int fd; |
65 |
|
66 |
void accept_cb (io_watcher &w, short revents); io_watcher accept_ev; |
67 |
|
68 |
unix_listener (const char *sockname); |
69 |
}; |
70 |
|
71 |
unix_listener::unix_listener (const char *sockname) |
72 |
: accept_ev (this, &unix_listener::accept_cb) |
73 |
{ |
74 |
sockaddr_un sa; |
75 |
|
76 |
if (strlen(sockname) >= sizeof(sa.sun_path)) |
77 |
rxvt_fatal ("socket name too long, aborting.\n"); |
78 |
|
79 |
if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
80 |
{ |
81 |
perror ("unable to create listening socket"); |
82 |
exit (EXIT_FAILURE); |
83 |
} |
84 |
|
85 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
86 |
|
87 |
sa.sun_family = AF_UNIX; |
88 |
strcpy (sa.sun_path, sockname); |
89 |
|
90 |
unlink (rxvt_connection::unix_sockname ()); |
91 |
|
92 |
mode_t omask = umask (0077); |
93 |
|
94 |
if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
95 |
{ |
96 |
perror ("unable to bind listening socket"); |
97 |
exit (EXIT_FAILURE); |
98 |
} |
99 |
|
100 |
umask (omask); |
101 |
|
102 |
if (listen (fd, 5)) |
103 |
{ |
104 |
perror ("unable to listen on socket"); |
105 |
exit (EXIT_FAILURE); |
106 |
} |
107 |
|
108 |
accept_ev.start (fd, EVENT_READ); |
109 |
} |
110 |
|
111 |
void unix_listener::accept_cb (io_watcher &w, short revents) |
112 |
{ |
113 |
int fd2 = accept (fd, 0, 0); |
114 |
|
115 |
if (fd2 >= 0) |
116 |
{ |
117 |
fcntl (fd2, F_SETFD, FD_CLOEXEC); |
118 |
new server (fd2); |
119 |
} |
120 |
} |
121 |
|
122 |
int server::getfd (int remote_fd) |
123 |
{ |
124 |
send ("GETFD"); |
125 |
send (remote_fd); |
126 |
return ptytty::recv_fd (fd); |
127 |
} |
128 |
|
129 |
void server::log_msg (const char *msg) |
130 |
{ |
131 |
send ("MSG"), send (msg); |
132 |
} |
133 |
|
134 |
void server::err (const char *format, ...) |
135 |
{ |
136 |
if (format) |
137 |
{ |
138 |
char err[1024]; |
139 |
|
140 |
va_list ap; |
141 |
va_start (ap, format); |
142 |
vsnprintf (err, 1024, format, ap); |
143 |
va_end (ap); |
144 |
|
145 |
send ("MSG"), send (err); |
146 |
} |
147 |
|
148 |
send ("END", 0); |
149 |
close (fd); |
150 |
delete this; |
151 |
} |
152 |
|
153 |
void server::read_cb (io_watcher &w, short revents) |
154 |
{ |
155 |
auto_str tok; |
156 |
|
157 |
if (recv (tok)) |
158 |
{ |
159 |
if (!strcmp (tok, "NEW")) |
160 |
{ |
161 |
stringvec *argv = new stringvec; |
162 |
stringvec *envv = new stringvec; |
163 |
|
164 |
for (;;) |
165 |
{ |
166 |
if (!recv (tok)) |
167 |
return err (); |
168 |
|
169 |
if (!strcmp (tok, "END")) |
170 |
break; |
171 |
else if (!strcmp (tok, "ENV") && recv (tok)) |
172 |
envv->push_back (strdup (tok)); |
173 |
else if (!strcmp (tok, "CWD") && recv (tok)) |
174 |
{ |
175 |
if (chdir (tok)) |
176 |
err ("unable to change to working directory to '%s': %s", |
177 |
(char *)tok, strerror (errno)); |
178 |
} |
179 |
else if (!strcmp (tok, "ARG") && recv (tok)) |
180 |
argv->push_back (strdup (tok)); |
181 |
else |
182 |
return err ("protocol error: unexpected NEW token"); |
183 |
} |
184 |
|
185 |
envv->push_back (0); |
186 |
|
187 |
{ |
188 |
rxvt_term *term = new rxvt_term; |
189 |
|
190 |
term->log_hook = &log_cb; |
191 |
term->getfd_hook = &getfd_cb; |
192 |
|
193 |
bool success; |
194 |
|
195 |
try |
196 |
{ |
197 |
success = term->init (argv, envv); |
198 |
} |
199 |
catch (const class rxvt_failure_exception &e) |
200 |
{ |
201 |
success = false; |
202 |
} |
203 |
|
204 |
term->log_hook = 0; |
205 |
|
206 |
chdir ("/"); |
207 |
|
208 |
if (!success) |
209 |
term->destroy (); |
210 |
|
211 |
send ("END"); send (success ? 1 : 0); |
212 |
} |
213 |
} |
214 |
else |
215 |
return err ("protocol error: request '%s' unsupported.", (char *)tok); |
216 |
} |
217 |
else |
218 |
return err (); |
219 |
} |
220 |
|
221 |
int opt_fork, opt_opendisplay, opt_quiet; |
222 |
|
223 |
int |
224 |
main (int argc, const char *const *argv) |
225 |
{ |
226 |
rxvt_init (); |
227 |
|
228 |
for (int i = 1; i < argc; i++) |
229 |
{ |
230 |
if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
231 |
opt_fork = 1; |
232 |
else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
233 |
opt_opendisplay = 1; |
234 |
else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
235 |
opt_quiet = 1; |
236 |
else |
237 |
{ |
238 |
rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
239 |
return EXIT_FAILURE; |
240 |
} |
241 |
} |
242 |
|
243 |
chdir ("/"); |
244 |
|
245 |
if (opt_opendisplay) |
246 |
displays.get (getenv ("DISPLAY")); // open display and never release it |
247 |
|
248 |
char *sockname = rxvt_connection::unix_sockname (); |
249 |
unix_listener l (sockname); |
250 |
|
251 |
if (!opt_quiet) |
252 |
{ |
253 |
printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
254 |
fflush (stdout); |
255 |
} |
256 |
|
257 |
free (sockname); |
258 |
|
259 |
if (opt_fork) |
260 |
{ |
261 |
pid_t pid = fork (); |
262 |
|
263 |
if (pid < 0) |
264 |
{ |
265 |
rxvt_log ("unable to fork daemon, aborting.\n"); |
266 |
return EXIT_FAILURE; |
267 |
} |
268 |
else if (pid > 0) |
269 |
_exit (EXIT_SUCCESS); |
270 |
} |
271 |
|
272 |
io_manager::loop (); |
273 |
|
274 |
return EXIT_SUCCESS; |
275 |
} |
276 |
|