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 | |
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|
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 | |
49 | |
42 | struct server : rxvt_connection { |
50 | struct server : rxvt_connection |
|
|
51 | { |
43 | log_callback log_cb; |
52 | log_callback log_cb; |
44 | getfd_callback getfd_cb; |
53 | getfd_callback getfd_cb; |
45 | |
54 | |
46 | void read_cb (ev::io &w, int revents); ev::io read_ev; |
55 | void read_cb (ev::io &w, int revents); ev::io read_ev; |
47 | void log_msg (const char *msg); |
56 | void log_msg (const char *msg); |
48 | int getfd (int remote_fd); |
57 | int getfd (int remote_fd); |
49 | |
58 | |
50 | server (int fd) |
59 | server (int fd) |
51 | : read_ev (this, &server::read_cb), |
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52 | log_cb (this, &server::log_msg), |
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53 | getfd_cb (this, &server::getfd) |
|
|
54 | { |
60 | { |
|
|
61 | read_ev.set <server, &server::read_cb> (this); |
|
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62 | log_cb.set <server, &server::log_msg> (this); |
|
|
63 | getfd_cb.set<server, &server::getfd> (this); |
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|
64 | |
55 | this->fd = fd; |
65 | this->fd = fd; |
|
|
66 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
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67 | fcntl (fd, F_SETFL, 0); |
56 | read_ev.start (fd, ev::READ); |
68 | read_ev.start (fd, ev::READ); |
57 | } |
69 | } |
58 | |
70 | |
59 | void err (const char *format = 0, ...); |
71 | void err (const char *format = 0, ...); |
60 | }; |
72 | }; |
61 | |
73 | |
62 | struct unix_listener { |
74 | struct unix_listener |
|
|
75 | { |
63 | int fd; |
76 | int fd; |
64 | |
77 | |
65 | void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
78 | void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
66 | |
79 | |
|
|
80 | unix_listener (int fd); |
67 | unix_listener (const char *sockname); |
81 | static int open (const char *sockname); |
68 | }; |
82 | }; |
69 | |
83 | |
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|
84 | unix_listener::unix_listener (int fd) : fd (fd) |
|
|
85 | { |
|
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86 | accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); |
|
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87 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
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88 | fcntl (fd, F_SETFL, O_NONBLOCK); |
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89 | accept_ev.start (fd, ev::READ); |
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90 | } |
|
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91 | |
70 | unix_listener::unix_listener (const char *sockname) |
92 | int unix_listener::open (const char *sockname) |
71 | : accept_ev (this, &unix_listener::accept_cb) |
|
|
72 | { |
93 | { |
73 | sockaddr_un sa; |
94 | sockaddr_un sa; |
74 | |
95 | |
75 | if (strlen (sockname) >= sizeof(sa.sun_path)) |
96 | if (strlen (sockname) >= sizeof(sa.sun_path)) |
76 | { |
97 | { |
77 | fputs ("socket name too long, aborting.\n", stderr); |
98 | fputs ("socket name too long, aborting.\n", stderr); |
78 | exit (EXIT_FAILURE); |
99 | exit (EXIT_FAILURE); |
79 | } |
100 | } |
80 | |
101 | |
|
|
102 | int fd; |
81 | if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
103 | if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
82 | { |
104 | { |
83 | perror ("unable to create listening socket"); |
105 | perror ("unable to create listening socket"); |
84 | exit (EXIT_FAILURE); |
106 | exit (EXIT_FAILURE); |
85 | } |
107 | } |
86 | |
108 | |
87 | fcntl (fd, F_SETFD, FD_CLOEXEC); |
|
|
88 | |
|
|
89 | sa.sun_family = AF_UNIX; |
109 | sa.sun_family = AF_UNIX; |
90 | strcpy (sa.sun_path, sockname); |
110 | strcpy (sa.sun_path, sockname); |
91 | |
111 | |
92 | unlink (rxvt_connection::unix_sockname ()); |
112 | unlink (sockname); |
93 | |
113 | |
94 | mode_t omask = umask (0077); |
114 | mode_t omask = umask (0077); |
95 | |
115 | |
96 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
116 | if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
97 | { |
117 | { |
… | |
… | |
105 | { |
125 | { |
106 | perror ("unable to listen on socket"); |
126 | perror ("unable to listen on socket"); |
107 | exit (EXIT_FAILURE); |
127 | exit (EXIT_FAILURE); |
108 | } |
128 | } |
109 | |
129 | |
110 | accept_ev.start (fd, ev::READ); |
130 | return fd; |
111 | } |
131 | } |
112 | |
132 | |
113 | void unix_listener::accept_cb (ev::io &w, int revents) |
133 | void unix_listener::accept_cb (ev::io &w, int revents) |
114 | { |
134 | { |
115 | int fd2 = accept (fd, 0, 0); |
135 | int fd2 = accept (fd, 0, 0); |
116 | |
136 | |
117 | if (fd2 >= 0) |
137 | if (fd2 >= 0) |
118 | { |
|
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119 | fcntl (fd2, F_SETFD, FD_CLOEXEC); |
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120 | new server (fd2); |
138 | new server (fd2); |
121 | } |
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122 | } |
139 | } |
123 | |
140 | |
124 | int server::getfd (int remote_fd) |
141 | int server::getfd (int remote_fd) |
125 | { |
142 | { |
126 | send ("GETFD"); |
143 | send ("GETFD"); |
… | |
… | |
170 | |
187 | |
171 | if (!strcmp (tok, "END")) |
188 | if (!strcmp (tok, "END")) |
172 | break; |
189 | break; |
173 | else if (!strcmp (tok, "ENV") && recv (tok)) |
190 | else if (!strcmp (tok, "ENV") && recv (tok)) |
174 | envv->push_back (strdup (tok)); |
191 | envv->push_back (strdup (tok)); |
175 | else if (!strcmp (tok, "CWD") && recv (tok)) |
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176 | { |
|
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177 | if (chdir (tok)) |
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178 | { |
|
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179 | delete envv; |
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180 | delete argv; |
|
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181 | return err ("unable to change to working directory to '%s', aborting: %s.\n", |
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182 | (char *)tok, strerror (errno)); |
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183 | } |
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184 | } |
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185 | else if (!strcmp (tok, "ARG") && recv (tok)) |
192 | else if (!strcmp (tok, "ARG") && recv (tok)) |
186 | argv->push_back (strdup (tok)); |
193 | argv->push_back (strdup (tok)); |
187 | else |
194 | else |
188 | return err ("protocol error: unexpected NEW token.\n"); |
195 | return err ("protocol error: unexpected NEW token.\n"); |
189 | } |
196 | } |
190 | |
197 | |
191 | envv->push_back (0); |
|
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192 | |
|
|
193 | { |
198 | { |
194 | rxvt_term *term = new rxvt_term; |
199 | rxvt_term *term = new rxvt_term; |
195 | |
200 | |
196 | term->log_hook = &log_cb; |
201 | term->log_hook = &log_cb; |
197 | term->getfd_hook = &getfd_cb; |
202 | term->getfd_hook = &getfd_cb; |
198 | |
203 | |
199 | bool success; |
204 | bool success = true; |
200 | |
205 | |
201 | try |
206 | try |
202 | { |
207 | { |
203 | success = term->init (argv, envv); |
208 | term->init (argv, envv); |
204 | } |
209 | } |
205 | catch (const class rxvt_failure_exception &e) |
210 | catch (const std::exception &e) |
206 | { |
211 | { |
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212 | log_msg (e.what()); |
207 | success = false; |
213 | success = false; |
208 | } |
214 | } |
209 | |
215 | |
210 | term->log_hook = 0; |
216 | term->log_hook = 0; |
211 | |
217 | |
212 | chdir ("/"); |
218 | chdir ("/"); // init might change to different working directory |
213 | |
219 | |
214 | if (!success) |
220 | if (!success) |
215 | term->destroy (); |
221 | term->destroy (); |
216 | |
222 | |
217 | send ("END"); send (success ? 1 : 0); |
223 | send ("END"); send (success ? 1 : 0); |
218 | } |
224 | } |
219 | } |
225 | } |
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226 | else if (!strcmp (tok, "QUIT")) |
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227 | _exit (0); |
220 | else |
228 | else |
221 | return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
229 | return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
222 | } |
230 | } |
223 | else |
231 | else |
224 | return err (); |
232 | return err (); |
225 | } |
233 | } |
226 | |
234 | |
227 | int opt_fork, opt_opendisplay, opt_quiet; |
235 | #ifdef ENABLE_FRILLS |
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236 | enum { |
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237 | SD_LISTEN_FDS_START = 3, |
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238 | }; |
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239 | |
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240 | // https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html |
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241 | // https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c |
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242 | static int get_listen_fds () |
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243 | { |
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244 | const char *listen_pid = getenv ("LISTEN_PID"); |
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245 | if (!listen_pid) |
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246 | return 0; |
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247 | |
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248 | char *end; |
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249 | errno = 0; |
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250 | long pid = strtol (listen_pid, &end, 10); |
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251 | if (errno || end == listen_pid || *end) |
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252 | return -1; |
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253 | |
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254 | if (getpid () != pid) |
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255 | return 0; |
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256 | |
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257 | const char *listen_fds = getenv ("LISTEN_FDS"); |
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258 | if (!listen_fds) |
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259 | return 0; |
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260 | |
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261 | errno = 0; |
|
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262 | long n = strtol (listen_fds, &end, 10); |
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263 | if (errno || end == listen_fds || *end) |
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264 | return -1; |
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265 | |
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266 | if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START) |
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267 | return -1; |
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268 | |
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269 | unsetenv ("LISTEN_PID"); |
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270 | unsetenv ("LISTEN_FDS"); |
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271 | unsetenv ("LISTEN_FDNAMES"); |
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272 | |
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273 | return n; |
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274 | } |
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275 | #endif |
228 | |
276 | |
229 | int |
277 | int |
230 | main (int argc, const char *const *argv) |
278 | main (int argc, char *argv[]) |
231 | { |
279 | { |
232 | rxvt_init (); |
280 | try |
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281 | { |
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282 | ptytty::init (); |
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283 | } |
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284 | catch (const std::exception &e) |
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285 | { |
|
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286 | fputs (e.what (), stderr); |
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287 | return EXIT_FAILURE; |
|
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288 | } |
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289 | |
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290 | static char opt_fork, opt_opendisplay, opt_quiet; |
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291 | #if ENABLE_PERL |
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292 | static char *opt_eval; |
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293 | #endif |
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294 | #if ENABLE_MLOCK |
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295 | static char opt_lock; |
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296 | #endif |
233 | |
297 | |
234 | for (int i = 1; i < argc; i++) |
298 | for (int i = 1; i < argc; i++) |
235 | { |
299 | { |
236 | if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
300 | if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
237 | opt_fork = 1; |
301 | opt_fork = 1; |
238 | else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
302 | else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
239 | opt_opendisplay = 1; |
303 | opt_opendisplay = 1; |
240 | else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
304 | else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
241 | opt_quiet = 1; |
305 | opt_quiet = 1; |
|
|
306 | #if ENABLE_MLOCK |
|
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307 | else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) |
|
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308 | opt_lock = 1; |
|
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309 | #endif |
|
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310 | #if ENABLE_PERL |
|
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311 | else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval")) |
|
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312 | opt_eval = argv [++i]; |
|
|
313 | #endif |
242 | else |
314 | else |
243 | { |
315 | { |
244 | rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
316 | rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
245 | return EXIT_FAILURE; |
317 | return EXIT_FAILURE; |
246 | } |
318 | } |
247 | } |
319 | } |
248 | |
320 | |
|
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321 | rxvt_init (); |
|
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322 | |
|
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323 | #if ENABLE_PERL |
|
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324 | if (opt_eval) |
|
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325 | { |
|
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326 | rxvt_perl.init (); |
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327 | rxvt_perl.eval (opt_eval); |
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328 | } |
|
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329 | #endif |
|
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330 | |
|
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331 | // optionally open display and never release it. |
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332 | if (opt_opendisplay) |
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333 | if (const char *dpy = getenv ("DISPLAY")) |
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334 | displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? |
|
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335 | |
|
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336 | int fd; |
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337 | #ifdef ENABLE_FRILLS |
|
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338 | int n = get_listen_fds (); |
|
|
339 | if (n > 1) |
|
|
340 | { |
|
|
341 | fputs ("received multiple file descriptors, aborting.\n", stderr); |
|
|
342 | exit (EXIT_FAILURE); |
|
|
343 | } |
|
|
344 | else if (n == 1) |
|
|
345 | { |
|
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346 | fd = SD_LISTEN_FDS_START; |
|
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347 | if (!opt_quiet) |
|
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348 | { |
|
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349 | printf ("rxvt-unicode daemon listening on fd.\n"); |
|
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350 | fflush (stdout); |
|
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351 | } |
|
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352 | } |
|
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353 | else |
|
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354 | #endif |
|
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355 | { |
|
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356 | char *sockname = rxvt_connection::unix_sockname (); |
|
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357 | fd = unix_listener::open (sockname); |
|
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358 | if (!opt_quiet) |
|
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359 | { |
|
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360 | printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
|
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361 | fflush (stdout); |
|
|
362 | } |
|
|
363 | free (sockname); |
|
|
364 | } |
|
|
365 | |
|
|
366 | unix_listener l (fd); |
|
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367 | |
249 | chdir ("/"); |
368 | chdir ("/"); |
250 | |
369 | |
251 | if (opt_opendisplay) |
370 | pid_t pid = 0; |
252 | displays.get (getenv ("DISPLAY")); // open display and never release it |
|
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253 | |
|
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254 | char *sockname = rxvt_connection::unix_sockname (); |
|
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255 | unix_listener l (sockname); |
|
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256 | |
|
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257 | if (!opt_quiet) |
|
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258 | { |
|
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259 | printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
|
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260 | fflush (stdout); |
|
|
261 | } |
|
|
262 | |
|
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263 | free (sockname); |
|
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264 | |
|
|
265 | if (opt_fork) |
371 | if (opt_fork) |
266 | { |
372 | { |
267 | pid_t pid = fork (); |
373 | pid = fork (); |
|
|
374 | } |
268 | |
375 | |
|
|
376 | #if ENABLE_MLOCK |
|
|
377 | // Optionally perform an mlockall so this process does not get swapped out. |
|
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378 | if (opt_lock && !pid) |
|
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379 | if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0) |
|
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380 | perror ("unable to lock into ram"); |
|
|
381 | #endif |
|
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382 | |
|
|
383 | if (opt_fork) |
|
|
384 | { |
269 | if (pid < 0) |
385 | if (pid < 0) |
270 | { |
386 | { |
271 | rxvt_log ("unable to fork daemon, aborting.\n"); |
387 | rxvt_log ("unable to fork daemon, aborting.\n"); |
272 | return EXIT_FAILURE; |
388 | return EXIT_FAILURE; |
273 | } |
389 | } |
274 | else if (pid > 0) |
390 | else if (pid > 0) |
275 | _exit (EXIT_SUCCESS); |
391 | _exit (EXIT_SUCCESS); |
276 | } |
|
|
277 | |
392 | |
278 | ev::ev_loop (0); |
393 | ev_loop_fork (EV_DEFAULT_UC); |
|
|
394 | } |
|
|
395 | |
|
|
396 | ev_run (); |
279 | |
397 | |
280 | return EXIT_SUCCESS; |
398 | return EXIT_SUCCESS; |
281 | } |
399 | } |
282 | |
400 | |