1 | /*----------------------------------------------------------------------* |
1 | /*----------------------------------------------------------------------* |
2 | * File: rxvtd.C |
2 | * File: rxvtd.C |
3 | *----------------------------------------------------------------------* |
3 | *----------------------------------------------------------------------* |
4 | * |
4 | * |
5 | * All portions of code are copyright by their respective author/s. |
5 | * All portions of code are copyright by their respective author/s. |
6 | * Copyright (c) 2003-2006 Marc Lehmann <pcg@goof.com> |
6 | * Copyright (c) 2003-2007 Marc Lehmann <schmorp@schmorp.de> |
7 | * |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify |
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 |
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 |
10 | * the Free Software Foundation; either version 3 of the License, or |
11 | * (at your option) any later version. |
11 | * (at your option) any later version. |
12 | * |
12 | * |
13 | * This program is distributed in the hope that it will be useful, |
13 | * This program is distributed in the hope that it will be useful, |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
… | |
… | |
19 | * along with this program; if not, write to the Free Software |
19 | * along with this program; if not, write to the Free Software |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
21 | *----------------------------------------------------------------------*/ |
21 | *----------------------------------------------------------------------*/ |
22 | |
22 | |
23 | #include "../config.h" |
23 | #include "../config.h" |
24 | #include <cstdio> |
24 | #include <stdio.h> |
25 | #include <cstdlib> |
25 | #include <stdlib.h> |
26 | #include <cstdarg> |
26 | #include <stdarg.h> |
27 | #include <cstring> |
27 | #include <string.h> |
28 | |
28 | |
29 | #include <unistd.h> |
29 | #include <unistd.h> |
30 | #include <fcntl.h> |
30 | #include <fcntl.h> |
31 | #include <sys/types.h> |
31 | #include <sys/types.h> |
32 | #include <sys/stat.h> |
32 | #include <sys/stat.h> |
33 | #include <sys/socket.h> |
33 | #include <sys/socket.h> |
34 | #include <sys/un.h> |
34 | #include <sys/un.h> |
35 | |
35 | |
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|
36 | #if defined(ENABLE_FRILLS) && defined(_POSIX_MEMLOCK) && _POSIX_MEMLOCK > 0 |
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|
37 | # define ENABLE_MLOCK 1 |
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|
38 | #endif |
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39 | |
|
|
40 | #if ENABLE_MLOCK |
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|
41 | # include <sys/mman.h> |
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|
42 | #endif |
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|
43 | |
36 | #include <cerrno> |
44 | #include <errno.h> |
37 | |
45 | |
38 | #include "rxvt.h" |
46 | #include "rxvt.h" |
39 | #include "rxvtdaemon.h" |
47 | #include "rxvtdaemon.h" |
40 | #include "libptytty.h" |
48 | #include "libptytty.h" |
41 | #include "iom.h" |
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|
42 | |
49 | |
43 | struct server : rxvt_connection { |
50 | struct server : rxvt_connection { |
44 | log_callback log_cb; |
51 | log_callback log_cb; |
45 | getfd_callback getfd_cb; |
52 | getfd_callback getfd_cb; |
46 | |
53 | |
47 | void read_cb (io_watcher &w, short revents); io_watcher read_ev; |
54 | void read_cb (ev::io &w, int revents); ev::io read_ev; |
48 | void log_msg (const char *msg); |
55 | void log_msg (const char *msg); |
49 | int getfd (int remote_fd); |
56 | int getfd (int remote_fd); |
50 | |
57 | |
51 | server (int fd) |
58 | server (int fd) |
52 | : read_ev (this, &server::read_cb), |
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53 | log_cb (this, &server::log_msg), |
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54 | getfd_cb (this, &server::getfd) |
|
|
55 | { |
59 | { |
|
|
60 | read_ev.set <server, &server::read_cb> (this); |
|
|
61 | log_cb.set <server, &server::log_msg> (this); |
|
|
62 | getfd_cb.set<server, &server::getfd> (this); |
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|
63 | |
56 | this->fd = fd; |
64 | this->fd = fd; |
|
|
65 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
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66 | fcntl (fd, F_SETFL, 0); |
57 | read_ev.start (fd, EVENT_READ); |
67 | read_ev.start (fd, ev::READ); |
58 | } |
68 | } |
59 | |
69 | |
60 | void err (const char *format = 0, ...); |
70 | void err (const char *format = 0, ...); |
61 | }; |
71 | }; |
62 | |
72 | |
63 | struct unix_listener { |
73 | struct unix_listener { |
64 | int fd; |
74 | int fd; |
65 | |
75 | |
66 | void accept_cb (io_watcher &w, short revents); io_watcher accept_ev; |
76 | void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
67 | |
77 | |
|
|
78 | unix_listener (int fd); |
68 | unix_listener (const char *sockname); |
79 | static int open (const char *sockname); |
69 | }; |
80 | }; |
70 | |
81 | |
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|
82 | unix_listener::unix_listener (int fd) : fd (fd) |
|
|
83 | { |
|
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84 | accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); |
|
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85 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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86 | fcntl (fd, F_SETFL, O_NONBLOCK); |
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87 | accept_ev.start (fd, ev::READ); |
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88 | } |
|
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89 | |
71 | unix_listener::unix_listener (const char *sockname) |
90 | int unix_listener::open (const char *sockname) |
72 | : accept_ev (this, &unix_listener::accept_cb) |
|
|
73 | { |
91 | { |
74 | sockaddr_un sa; |
92 | sockaddr_un sa; |
75 | |
93 | |
76 | if (strlen (sockname) >= sizeof(sa.sun_path)) |
94 | if (strlen (sockname) >= sizeof(sa.sun_path)) |
77 | { |
95 | { |
78 | fputs ("socket name too long, aborting.\n", stderr); |
96 | fputs ("socket name too long, aborting.\n", stderr); |
79 | exit (EXIT_FAILURE); |
97 | exit (EXIT_FAILURE); |
80 | } |
98 | } |
81 | |
99 | |
|
|
100 | int fd; |
82 | if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
101 | if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
83 | { |
102 | { |
84 | perror ("unable to create listening socket"); |
103 | perror ("unable to create listening socket"); |
85 | exit (EXIT_FAILURE); |
104 | exit (EXIT_FAILURE); |
86 | } |
105 | } |
87 | |
|
|
88 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
89 | |
106 | |
90 | sa.sun_family = AF_UNIX; |
107 | sa.sun_family = AF_UNIX; |
91 | strcpy (sa.sun_path, sockname); |
108 | strcpy (sa.sun_path, sockname); |
92 | |
109 | |
93 | unlink (rxvt_connection::unix_sockname ()); |
110 | unlink (sockname); |
94 | |
111 | |
95 | mode_t omask = umask (0077); |
112 | mode_t omask = umask (0077); |
96 | |
113 | |
97 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
114 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
98 | { |
115 | { |
… | |
… | |
106 | { |
123 | { |
107 | perror ("unable to listen on socket"); |
124 | perror ("unable to listen on socket"); |
108 | exit (EXIT_FAILURE); |
125 | exit (EXIT_FAILURE); |
109 | } |
126 | } |
110 | |
127 | |
111 | accept_ev.start (fd, EVENT_READ); |
128 | return fd; |
112 | } |
129 | } |
113 | |
130 | |
114 | void unix_listener::accept_cb (io_watcher &w, short revents) |
131 | void unix_listener::accept_cb (ev::io &w, int revents) |
115 | { |
132 | { |
116 | int fd2 = accept (fd, 0, 0); |
133 | int fd2 = accept (fd, 0, 0); |
117 | |
134 | |
118 | if (fd2 >= 0) |
135 | if (fd2 >= 0) |
119 | { |
|
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120 | fcntl (fd2, F_SETFD, FD_CLOEXEC); |
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121 | new server (fd2); |
136 | new server (fd2); |
122 | } |
|
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123 | } |
137 | } |
124 | |
138 | |
125 | int server::getfd (int remote_fd) |
139 | int server::getfd (int remote_fd) |
126 | { |
140 | { |
127 | send ("GETFD"); |
141 | send ("GETFD"); |
… | |
… | |
143 | va_list ap; |
157 | va_list ap; |
144 | va_start (ap, format); |
158 | va_start (ap, format); |
145 | vsnprintf (err, 1024, format, ap); |
159 | vsnprintf (err, 1024, format, ap); |
146 | va_end (ap); |
160 | va_end (ap); |
147 | |
161 | |
148 | send ("MSG"), send (err); |
162 | log_msg (err); |
149 | } |
163 | } |
150 | |
164 | |
151 | send ("END"); send (0); |
165 | send ("END"), send (0); |
152 | close (fd); |
166 | close (fd); |
153 | delete this; |
167 | delete this; |
154 | } |
168 | } |
155 | |
169 | |
156 | void server::read_cb (io_watcher &w, short revents) |
170 | void server::read_cb (ev::io &w, int revents) |
157 | { |
171 | { |
158 | auto_str tok; |
172 | auto_str tok; |
159 | |
173 | |
160 | if (recv (tok)) |
174 | if (recv (tok)) |
161 | { |
175 | { |
162 | if (!strcmp (tok, "NEW")) |
176 | if (!strcmp (tok, "NEW")) |
163 | { |
177 | { |
164 | stringvec *argv = new stringvec; |
178 | stringvec *argv = new stringvec; |
165 | stringvec *envv = new stringvec; |
179 | stringvec *envv = new stringvec; |
166 | |
180 | |
167 | for (;;) |
181 | for (;;) |
168 | { |
182 | { |
169 | if (!recv (tok)) |
183 | if (!recv (tok)) |
170 | return err (); |
184 | return err (); |
171 | |
185 | |
172 | if (!strcmp (tok, "END")) |
186 | if (!strcmp (tok, "END")) |
173 | break; |
187 | break; |
174 | else if (!strcmp (tok, "ENV") && recv (tok)) |
188 | else if (!strcmp (tok, "ENV") && recv (tok)) |
175 | envv->push_back (strdup (tok)); |
189 | envv->push_back (strdup (tok)); |
176 | else if (!strcmp (tok, "CWD") && recv (tok)) |
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177 | { |
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178 | if (chdir (tok)) |
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179 | { |
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180 | delete envv; |
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181 | delete argv; |
|
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182 | return err ("unable to change to working directory to '%s', aborting: %s.\n", |
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183 | (char *)tok, strerror (errno)); |
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184 | } |
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185 | } |
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186 | else if (!strcmp (tok, "ARG") && recv (tok)) |
190 | else if (!strcmp (tok, "ARG") && recv (tok)) |
187 | argv->push_back (strdup (tok)); |
191 | argv->push_back (strdup (tok)); |
188 | else |
192 | else |
189 | return err ("protocol error: unexpected NEW token.\n"); |
193 | return err ("protocol error: unexpected NEW token.\n"); |
190 | } |
194 | } |
191 | |
195 | |
192 | envv->push_back (0); |
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193 | |
|
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194 | { |
196 | { |
195 | rxvt_term *term = new rxvt_term; |
197 | rxvt_term *term = new rxvt_term; |
196 | |
198 | |
197 | term->log_hook = &log_cb; |
199 | term->log_hook = &log_cb; |
198 | term->getfd_hook = &getfd_cb; |
200 | term->getfd_hook = &getfd_cb; |
199 | |
201 | |
200 | bool success; |
202 | bool success = true; |
201 | |
203 | |
202 | try |
204 | try |
203 | { |
205 | { |
204 | success = term->init (argv, envv); |
206 | term->init (argv, envv); |
205 | } |
207 | } |
206 | catch (const class rxvt_failure_exception &e) |
208 | catch (const class rxvt_failure_exception &e) |
207 | { |
209 | { |
208 | success = false; |
210 | success = false; |
209 | } |
211 | } |
210 | |
212 | |
211 | term->log_hook = 0; |
213 | term->log_hook = 0; |
212 | |
214 | |
213 | chdir ("/"); |
215 | chdir ("/"); // init might change to different working directory |
214 | |
216 | |
215 | if (!success) |
217 | if (!success) |
216 | term->destroy (); |
218 | term->destroy (); |
217 | |
219 | |
218 | send ("END"); send (success ? 1 : 0); |
220 | send ("END"); send (success ? 1 : 0); |
219 | } |
221 | } |
220 | } |
222 | } |
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223 | else if (!strcmp (tok, "QUIT")) |
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224 | _exit (0); |
221 | else |
225 | else |
222 | return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
226 | return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
223 | } |
227 | } |
224 | else |
228 | else |
225 | return err (); |
229 | return err (); |
226 | } |
230 | } |
227 | |
231 | |
228 | int opt_fork, opt_opendisplay, opt_quiet; |
232 | #ifdef ENABLE_FRILLS |
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233 | enum { |
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234 | SD_LISTEN_FDS_START = 3, |
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235 | }; |
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236 | |
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237 | // https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html |
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238 | // https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c |
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239 | static int get_listen_fds () |
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240 | { |
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241 | const char *listen_pid = getenv ("LISTEN_PID"); |
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242 | if (!listen_pid) |
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243 | return 0; |
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244 | |
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245 | char *end; |
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246 | errno = 0; |
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247 | long pid = strtol (listen_pid, &end, 10); |
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248 | if (errno || end == listen_pid || *end) |
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249 | return -1; |
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250 | |
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251 | if (getpid () != pid) |
|
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252 | return 0; |
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253 | |
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254 | const char *listen_fds = getenv ("LISTEN_FDS"); |
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255 | if (!listen_fds) |
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256 | return 0; |
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257 | |
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258 | errno = 0; |
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259 | long n = strtol (listen_fds, &end, 10); |
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260 | if (errno || end == listen_fds || *end) |
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261 | return -1; |
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262 | |
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263 | if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) |
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264 | return -1; |
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265 | |
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266 | unsetenv ("LISTEN_PID"); |
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267 | unsetenv ("LISTEN_FDS"); |
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268 | unsetenv ("LISTEN_FDNAMES"); |
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269 | |
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270 | return n; |
|
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271 | } |
|
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272 | #endif |
229 | |
273 | |
230 | int |
274 | int |
231 | main (int argc, const char *const *argv) |
275 | main (int argc, char *argv[]) |
232 | { |
276 | { |
233 | rxvt_init (); |
277 | ptytty::init (); |
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278 | |
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279 | static char opt_fork, opt_opendisplay, opt_quiet; |
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280 | #if ENABLE_PERL |
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281 | static char *opt_eval; |
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282 | #endif |
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283 | #if ENABLE_MLOCK |
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284 | static char opt_lock; |
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285 | #endif |
234 | |
286 | |
235 | for (int i = 1; i < argc; i++) |
287 | for (int i = 1; i < argc; i++) |
236 | { |
288 | { |
237 | if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
289 | if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
238 | opt_fork = 1; |
290 | opt_fork = 1; |
239 | else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
291 | else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
240 | opt_opendisplay = 1; |
292 | opt_opendisplay = 1; |
241 | else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
293 | else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
242 | opt_quiet = 1; |
294 | opt_quiet = 1; |
|
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295 | #if ENABLE_MLOCK |
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296 | else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) |
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297 | opt_lock = 1; |
|
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298 | #endif |
|
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299 | #if ENABLE_PERL |
|
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300 | else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval")) |
|
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301 | opt_eval = argv [++i]; |
|
|
302 | #endif |
243 | else |
303 | else |
244 | { |
304 | { |
245 | rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
305 | rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
246 | return EXIT_FAILURE; |
306 | return EXIT_FAILURE; |
247 | } |
307 | } |
248 | } |
308 | } |
249 | |
309 | |
|
|
310 | rxvt_init (); |
|
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311 | |
|
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312 | #if ENABLE_PERL |
|
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313 | if (opt_eval) |
|
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314 | { |
|
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315 | rxvt_perl.init (); |
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316 | rxvt_perl.eval (opt_eval); |
|
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317 | } |
|
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318 | #endif |
|
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319 | |
|
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320 | // optionally open display and never release it. |
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321 | if (opt_opendisplay) |
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322 | if (const char *dpy = getenv ("DISPLAY")) |
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323 | displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? |
|
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324 | |
|
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325 | int fd; |
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326 | #ifdef ENABLE_FRILLS |
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327 | int n = get_listen_fds (); |
|
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328 | if (n > 1) |
|
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329 | { |
|
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330 | fputs ("received multiple file descriptors, aborting.\n", stderr); |
|
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331 | exit (EXIT_FAILURE); |
|
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332 | } |
|
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333 | else if (n == 1) |
|
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334 | { |
|
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335 | fd = SD_LISTEN_FDS_START; |
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336 | if (!opt_quiet) |
|
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337 | { |
|
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338 | printf ("rxvt-unicode daemon listening on fd.\n"); |
|
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339 | fflush (stdout); |
|
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340 | } |
|
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341 | } |
|
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342 | else |
|
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343 | #endif |
|
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344 | { |
|
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345 | char *sockname = rxvt_connection::unix_sockname (); |
|
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346 | fd = unix_listener::open (sockname); |
|
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347 | if (!opt_quiet) |
|
|
348 | { |
|
|
349 | printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
|
|
350 | fflush (stdout); |
|
|
351 | } |
|
|
352 | free (sockname); |
|
|
353 | } |
|
|
354 | |
|
|
355 | unix_listener l (fd); |
|
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356 | |
250 | chdir ("/"); |
357 | chdir ("/"); |
251 | |
358 | |
252 | if (opt_opendisplay) |
359 | pid_t pid = 0; |
253 | displays.get (getenv ("DISPLAY")); // open display and never release it |
|
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254 | |
|
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255 | char *sockname = rxvt_connection::unix_sockname (); |
|
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256 | unix_listener l (sockname); |
|
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257 | |
|
|
258 | if (!opt_quiet) |
|
|
259 | { |
|
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260 | printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
|
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261 | fflush (stdout); |
|
|
262 | } |
|
|
263 | |
|
|
264 | free (sockname); |
|
|
265 | |
|
|
266 | if (opt_fork) |
360 | if (opt_fork) |
267 | { |
361 | { |
268 | pid_t pid = fork (); |
362 | pid = fork (); |
|
|
363 | } |
269 | |
364 | |
|
|
365 | #if ENABLE_MLOCK |
|
|
366 | // Optionally perform an mlockall so this process does not get swapped out. |
|
|
367 | if (opt_lock && !pid) |
|
|
368 | if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0) |
|
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369 | perror ("unable to lock into ram"); |
|
|
370 | #endif |
|
|
371 | |
|
|
372 | if (opt_fork) |
|
|
373 | { |
270 | if (pid < 0) |
374 | if (pid < 0) |
271 | { |
375 | { |
272 | rxvt_log ("unable to fork daemon, aborting.\n"); |
376 | rxvt_log ("unable to fork daemon, aborting.\n"); |
273 | return EXIT_FAILURE; |
377 | return EXIT_FAILURE; |
274 | } |
378 | } |
275 | else if (pid > 0) |
379 | else if (pid > 0) |
276 | _exit (EXIT_SUCCESS); |
380 | _exit (EXIT_SUCCESS); |
277 | } |
|
|
278 | |
381 | |
279 | io_manager::loop (); |
382 | ev_loop_fork (EV_DEFAULT_UC); |
|
|
383 | } |
|
|
384 | |
|
|
385 | ev_run (); |
280 | |
386 | |
281 | return EXIT_SUCCESS; |
387 | return EXIT_SUCCESS; |
282 | } |
388 | } |
283 | |
389 | |