1 |
root |
1.29 |
/*----------------------------------------------------------------------* |
2 |
pcg |
1.14 |
* File: rxvtd.C |
3 |
|
|
*----------------------------------------------------------------------* |
4 |
|
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* |
5 |
|
|
* All portions of code are copyright by their respective author/s. |
6 |
root |
1.56 |
* Copyright (c) 2003-2007 Marc Lehmann <schmorp@schmorp.de> |
7 |
pcg |
1.14 |
* |
8 |
|
|
* This program is free software; you can redistribute it and/or modify |
9 |
|
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* it under the terms of the GNU General Public License as published by |
10 |
root |
1.61 |
* the Free Software Foundation; either version 3 of the License, or |
11 |
pcg |
1.14 |
* (at your option) any later version. |
12 |
|
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* |
13 |
|
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* This program is distributed in the hope that it will be useful, |
14 |
|
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 |
|
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 |
|
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* GNU General Public License for more details. |
17 |
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* |
18 |
|
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* You should have received a copy of the GNU General Public License |
19 |
|
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* along with this program; if not, write to the Free Software |
20 |
|
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 |
|
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*----------------------------------------------------------------------*/ |
22 |
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|
23 |
pcg |
1.9 |
#include "../config.h" |
24 |
sf-exg |
1.59 |
#include <stdio.h> |
25 |
|
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#include <stdlib.h> |
26 |
|
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#include <stdarg.h> |
27 |
|
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#include <string.h> |
28 |
pcg |
1.1 |
|
29 |
|
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#include <unistd.h> |
30 |
pcg |
1.12 |
#include <fcntl.h> |
31 |
pcg |
1.5 |
#include <sys/types.h> |
32 |
|
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#include <sys/stat.h> |
33 |
pcg |
1.1 |
#include <sys/socket.h> |
34 |
|
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#include <sys/un.h> |
35 |
|
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|
36 |
root |
1.47 |
#if defined(ENABLE_FRILLS) && defined(_POSIX_MEMLOCK) && _POSIX_MEMLOCK > 0 |
37 |
|
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# define ENABLE_MLOCK 1 |
38 |
|
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#endif |
39 |
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|
40 |
|
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#if ENABLE_MLOCK |
41 |
|
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# include <sys/mman.h> |
42 |
|
|
#endif |
43 |
|
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|
44 |
sf-exg |
1.59 |
#include <errno.h> |
45 |
pcg |
1.3 |
|
46 |
sf-exg |
1.67 |
#include <libptytty.h> |
47 |
|
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|
48 |
root |
1.27 |
#include "rxvt.h" |
49 |
|
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#include "rxvtdaemon.h" |
50 |
pcg |
1.3 |
|
51 |
root |
1.64 |
struct server : rxvt_connection |
52 |
|
|
{ |
53 |
pcg |
1.10 |
log_callback log_cb; |
54 |
root |
1.22 |
getfd_callback getfd_cb; |
55 |
pcg |
1.10 |
|
56 |
root |
1.34 |
void read_cb (ev::io &w, int revents); ev::io read_ev; |
57 |
pcg |
1.10 |
void log_msg (const char *msg); |
58 |
root |
1.22 |
int getfd (int remote_fd); |
59 |
pcg |
1.1 |
|
60 |
|
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server (int fd) |
61 |
|
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{ |
62 |
root |
1.41 |
read_ev.set <server, &server::read_cb> (this); |
63 |
|
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log_cb.set <server, &server::log_msg> (this); |
64 |
|
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getfd_cb.set<server, &server::getfd> (this); |
65 |
|
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|
66 |
root |
1.37 |
this->fd = fd; |
67 |
root |
1.35 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
68 |
|
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fcntl (fd, F_SETFL, 0); |
69 |
root |
1.34 |
read_ev.start (fd, ev::READ); |
70 |
pcg |
1.1 |
} |
71 |
|
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|
72 |
pcg |
1.3 |
void err (const char *format = 0, ...); |
73 |
pcg |
1.1 |
}; |
74 |
|
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|
75 |
root |
1.64 |
struct unix_listener |
76 |
|
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{ |
77 |
pcg |
1.1 |
int fd; |
78 |
|
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|
79 |
root |
1.34 |
void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
80 |
pcg |
1.1 |
|
81 |
sf-exg |
1.63 |
unix_listener (int fd); |
82 |
|
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static int open (const char *sockname); |
83 |
pcg |
1.1 |
}; |
84 |
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|
85 |
sf-exg |
1.63 |
unix_listener::unix_listener (int fd) : fd (fd) |
86 |
pcg |
1.1 |
{ |
87 |
root |
1.41 |
accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); |
88 |
sf-exg |
1.63 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
89 |
|
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fcntl (fd, F_SETFL, O_NONBLOCK); |
90 |
|
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accept_ev.start (fd, ev::READ); |
91 |
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} |
92 |
root |
1.41 |
|
93 |
sf-exg |
1.63 |
int unix_listener::open (const char *sockname) |
94 |
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{ |
95 |
root |
1.30 |
sockaddr_un sa; |
96 |
ayin |
1.33 |
|
97 |
root |
1.31 |
if (strlen (sockname) >= sizeof(sa.sun_path)) |
98 |
|
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{ |
99 |
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fputs ("socket name too long, aborting.\n", stderr); |
100 |
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exit (EXIT_FAILURE); |
101 |
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} |
102 |
root |
1.30 |
|
103 |
sf-exg |
1.63 |
int fd; |
104 |
root |
1.24 |
if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
105 |
pcg |
1.1 |
{ |
106 |
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perror ("unable to create listening socket"); |
107 |
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exit (EXIT_FAILURE); |
108 |
|
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} |
109 |
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|
110 |
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sa.sun_family = AF_UNIX; |
111 |
pcg |
1.5 |
strcpy (sa.sun_path, sockname); |
112 |
pcg |
1.1 |
|
113 |
sf-exg |
1.55 |
unlink (sockname); |
114 |
pcg |
1.1 |
|
115 |
pcg |
1.5 |
mode_t omask = umask (0077); |
116 |
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|
117 |
pcg |
1.1 |
if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
118 |
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{ |
119 |
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perror ("unable to bind listening socket"); |
120 |
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exit (EXIT_FAILURE); |
121 |
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} |
122 |
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|
123 |
pcg |
1.5 |
umask (omask); |
124 |
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|
125 |
pcg |
1.1 |
if (listen (fd, 5)) |
126 |
|
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{ |
127 |
|
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perror ("unable to listen on socket"); |
128 |
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exit (EXIT_FAILURE); |
129 |
|
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} |
130 |
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|
131 |
sf-exg |
1.63 |
return fd; |
132 |
pcg |
1.1 |
} |
133 |
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|
134 |
root |
1.34 |
void unix_listener::accept_cb (ev::io &w, int revents) |
135 |
pcg |
1.1 |
{ |
136 |
|
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int fd2 = accept (fd, 0, 0); |
137 |
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|
138 |
|
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if (fd2 >= 0) |
139 |
root |
1.35 |
new server (fd2); |
140 |
pcg |
1.1 |
} |
141 |
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|
142 |
root |
1.22 |
int server::getfd (int remote_fd) |
143 |
|
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{ |
144 |
|
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send ("GETFD"); |
145 |
|
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send (remote_fd); |
146 |
root |
1.27 |
return ptytty::recv_fd (fd); |
147 |
root |
1.22 |
} |
148 |
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|
149 |
pcg |
1.10 |
void server::log_msg (const char *msg) |
150 |
|
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{ |
151 |
|
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send ("MSG"), send (msg); |
152 |
|
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} |
153 |
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|
154 |
pcg |
1.3 |
void server::err (const char *format, ...) |
155 |
pcg |
1.1 |
{ |
156 |
pcg |
1.3 |
if (format) |
157 |
|
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{ |
158 |
|
|
char err[1024]; |
159 |
|
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|
160 |
|
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va_list ap; |
161 |
|
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va_start (ap, format); |
162 |
|
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vsnprintf (err, 1024, format, ap); |
163 |
|
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va_end (ap); |
164 |
|
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|
165 |
root |
1.32 |
log_msg (err); |
166 |
pcg |
1.3 |
} |
167 |
|
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|
168 |
root |
1.32 |
send ("END"), send (0); |
169 |
pcg |
1.1 |
close (fd); |
170 |
|
|
delete this; |
171 |
|
|
} |
172 |
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|
173 |
root |
1.34 |
void server::read_cb (ev::io &w, int revents) |
174 |
pcg |
1.1 |
{ |
175 |
pcg |
1.2 |
auto_str tok; |
176 |
pcg |
1.1 |
|
177 |
pcg |
1.2 |
if (recv (tok)) |
178 |
pcg |
1.1 |
{ |
179 |
pcg |
1.2 |
if (!strcmp (tok, "NEW")) |
180 |
pcg |
1.1 |
{ |
181 |
pcg |
1.9 |
stringvec *argv = new stringvec; |
182 |
|
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stringvec *envv = new stringvec; |
183 |
ayin |
1.33 |
|
184 |
pcg |
1.2 |
for (;;) |
185 |
|
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{ |
186 |
|
|
if (!recv (tok)) |
187 |
|
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return err (); |
188 |
|
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|
189 |
|
|
if (!strcmp (tok, "END")) |
190 |
|
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break; |
191 |
pcg |
1.3 |
else if (!strcmp (tok, "ENV") && recv (tok)) |
192 |
root |
1.26 |
envv->push_back (strdup (tok)); |
193 |
pcg |
1.2 |
else if (!strcmp (tok, "ARG") && recv (tok)) |
194 |
root |
1.26 |
argv->push_back (strdup (tok)); |
195 |
pcg |
1.2 |
else |
196 |
root |
1.31 |
return err ("protocol error: unexpected NEW token.\n"); |
197 |
pcg |
1.2 |
} |
198 |
|
|
|
199 |
pcg |
1.3 |
{ |
200 |
pcg |
1.10 |
rxvt_term *term = new rxvt_term; |
201 |
ayin |
1.33 |
|
202 |
pcg |
1.10 |
term->log_hook = &log_cb; |
203 |
root |
1.22 |
term->getfd_hook = &getfd_cb; |
204 |
pcg |
1.2 |
|
205 |
root |
1.42 |
bool success = true; |
206 |
ayin |
1.33 |
|
207 |
pcg |
1.10 |
try |
208 |
|
|
{ |
209 |
root |
1.42 |
term->init (argv, envv); |
210 |
pcg |
1.10 |
} |
211 |
sf-exg |
1.65 |
catch (const std::exception &e) |
212 |
|
|
{ |
213 |
|
|
log_msg (e.what()); |
214 |
|
|
success = false; |
215 |
|
|
} |
216 |
pcg |
1.10 |
|
217 |
root |
1.15 |
term->log_hook = 0; |
218 |
|
|
|
219 |
root |
1.46 |
chdir ("/"); // init might change to different working directory |
220 |
pcg |
1.10 |
|
221 |
|
|
if (!success) |
222 |
|
|
term->destroy (); |
223 |
|
|
|
224 |
|
|
send ("END"); send (success ? 1 : 0); |
225 |
pcg |
1.3 |
} |
226 |
pcg |
1.1 |
} |
227 |
sf-exg |
1.62 |
else if (!strcmp (tok, "QUIT")) |
228 |
|
|
_exit (0); |
229 |
pcg |
1.1 |
else |
230 |
root |
1.31 |
return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
231 |
pcg |
1.1 |
} |
232 |
|
|
else |
233 |
pcg |
1.2 |
return err (); |
234 |
pcg |
1.1 |
} |
235 |
|
|
|
236 |
sf-exg |
1.63 |
#ifdef ENABLE_FRILLS |
237 |
|
|
enum { |
238 |
|
|
SD_LISTEN_FDS_START = 3, |
239 |
|
|
}; |
240 |
|
|
|
241 |
|
|
// https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html |
242 |
|
|
// https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c |
243 |
|
|
static int get_listen_fds () |
244 |
|
|
{ |
245 |
|
|
const char *listen_pid = getenv ("LISTEN_PID"); |
246 |
|
|
if (!listen_pid) |
247 |
|
|
return 0; |
248 |
|
|
|
249 |
|
|
char *end; |
250 |
|
|
errno = 0; |
251 |
|
|
long pid = strtol (listen_pid, &end, 10); |
252 |
|
|
if (errno || end == listen_pid || *end) |
253 |
|
|
return -1; |
254 |
|
|
|
255 |
|
|
if (getpid () != pid) |
256 |
|
|
return 0; |
257 |
|
|
|
258 |
|
|
const char *listen_fds = getenv ("LISTEN_FDS"); |
259 |
|
|
if (!listen_fds) |
260 |
|
|
return 0; |
261 |
|
|
|
262 |
|
|
errno = 0; |
263 |
|
|
long n = strtol (listen_fds, &end, 10); |
264 |
|
|
if (errno || end == listen_fds || *end) |
265 |
|
|
return -1; |
266 |
|
|
|
267 |
|
|
if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) |
268 |
|
|
return -1; |
269 |
|
|
|
270 |
|
|
unsetenv ("LISTEN_PID"); |
271 |
|
|
unsetenv ("LISTEN_FDS"); |
272 |
|
|
unsetenv ("LISTEN_FDNAMES"); |
273 |
|
|
|
274 |
|
|
return n; |
275 |
|
|
} |
276 |
|
|
#endif |
277 |
|
|
|
278 |
sf-exg |
1.49 |
int |
279 |
root |
1.58 |
main (int argc, char *argv[]) |
280 |
sf-exg |
1.49 |
{ |
281 |
sf-exg |
1.65 |
try |
282 |
|
|
{ |
283 |
|
|
ptytty::init (); |
284 |
|
|
} |
285 |
|
|
catch (const std::exception &e) |
286 |
|
|
{ |
287 |
|
|
fputs (e.what (), stderr); |
288 |
|
|
return EXIT_FAILURE; |
289 |
|
|
} |
290 |
root |
1.52 |
|
291 |
sf-exg |
1.54 |
static char opt_fork, opt_opendisplay, opt_quiet; |
292 |
root |
1.60 |
#if ENABLE_PERL |
293 |
|
|
static char *opt_eval; |
294 |
|
|
#endif |
295 |
root |
1.47 |
#if ENABLE_MLOCK |
296 |
sf-exg |
1.54 |
static char opt_lock; |
297 |
root |
1.47 |
#endif |
298 |
root |
1.21 |
|
299 |
|
|
for (int i = 1; i < argc; i++) |
300 |
|
|
{ |
301 |
|
|
if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
302 |
|
|
opt_fork = 1; |
303 |
|
|
else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
304 |
|
|
opt_opendisplay = 1; |
305 |
|
|
else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
306 |
|
|
opt_quiet = 1; |
307 |
root |
1.47 |
#if ENABLE_MLOCK |
308 |
|
|
else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) |
309 |
|
|
opt_lock = 1; |
310 |
|
|
#endif |
311 |
root |
1.60 |
#if ENABLE_PERL |
312 |
|
|
else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval")) |
313 |
|
|
opt_eval = argv [++i]; |
314 |
|
|
#endif |
315 |
root |
1.21 |
else |
316 |
|
|
{ |
317 |
|
|
rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
318 |
|
|
return EXIT_FAILURE; |
319 |
|
|
} |
320 |
|
|
} |
321 |
ayin |
1.33 |
|
322 |
root |
1.52 |
rxvt_init (); |
323 |
|
|
|
324 |
root |
1.60 |
#if ENABLE_PERL |
325 |
|
|
if (opt_eval) |
326 |
|
|
{ |
327 |
|
|
rxvt_perl.init (); |
328 |
|
|
rxvt_perl.eval (opt_eval); |
329 |
|
|
} |
330 |
|
|
#endif |
331 |
|
|
|
332 |
root |
1.45 |
// optionally open display and never release it. |
333 |
root |
1.21 |
if (opt_opendisplay) |
334 |
root |
1.45 |
if (const char *dpy = getenv ("DISPLAY")) |
335 |
|
|
displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? |
336 |
root |
1.21 |
|
337 |
sf-exg |
1.63 |
int fd; |
338 |
|
|
#ifdef ENABLE_FRILLS |
339 |
|
|
int n = get_listen_fds (); |
340 |
|
|
if (n > 1) |
341 |
|
|
{ |
342 |
|
|
fputs ("received multiple file descriptors, aborting.\n", stderr); |
343 |
|
|
exit (EXIT_FAILURE); |
344 |
|
|
} |
345 |
|
|
else if (n == 1) |
346 |
|
|
{ |
347 |
|
|
fd = SD_LISTEN_FDS_START; |
348 |
|
|
if (!opt_quiet) |
349 |
|
|
{ |
350 |
|
|
printf ("rxvt-unicode daemon listening on fd.\n"); |
351 |
|
|
fflush (stdout); |
352 |
|
|
} |
353 |
|
|
} |
354 |
|
|
else |
355 |
|
|
#endif |
356 |
root |
1.21 |
{ |
357 |
sf-exg |
1.63 |
char *sockname = rxvt_connection::unix_sockname (); |
358 |
|
|
fd = unix_listener::open (sockname); |
359 |
|
|
if (!opt_quiet) |
360 |
|
|
{ |
361 |
|
|
printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
362 |
|
|
fflush (stdout); |
363 |
|
|
} |
364 |
|
|
free (sockname); |
365 |
root |
1.21 |
} |
366 |
|
|
|
367 |
sf-exg |
1.63 |
unix_listener l (fd); |
368 |
|
|
|
369 |
|
|
chdir ("/"); |
370 |
pcg |
1.5 |
|
371 |
root |
1.47 |
pid_t pid = 0; |
372 |
root |
1.21 |
if (opt_fork) |
373 |
|
|
{ |
374 |
root |
1.47 |
pid = fork (); |
375 |
|
|
} |
376 |
|
|
|
377 |
|
|
#if ENABLE_MLOCK |
378 |
root |
1.48 |
// Optionally perform an mlockall so this process does not get swapped out. |
379 |
|
|
if (opt_lock && !pid) |
380 |
|
|
if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0) |
381 |
|
|
perror ("unable to lock into ram"); |
382 |
root |
1.47 |
#endif |
383 |
root |
1.21 |
|
384 |
root |
1.47 |
if (opt_fork) |
385 |
|
|
{ |
386 |
root |
1.21 |
if (pid < 0) |
387 |
|
|
{ |
388 |
|
|
rxvt_log ("unable to fork daemon, aborting.\n"); |
389 |
|
|
return EXIT_FAILURE; |
390 |
|
|
} |
391 |
|
|
else if (pid > 0) |
392 |
|
|
_exit (EXIT_SUCCESS); |
393 |
root |
1.38 |
|
394 |
root |
1.51 |
ev_loop_fork (EV_DEFAULT_UC); |
395 |
root |
1.21 |
} |
396 |
|
|
|
397 |
root |
1.50 |
ev_run (); |
398 |
pcg |
1.1 |
|
399 |
|
|
return EXIT_SUCCESS; |
400 |
|
|
} |
401 |
pcg |
1.7 |
|