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Comparing rxvt-unicode/src/rxvtd.C (file contents):
Revision 1.40 by root, Tue Dec 4 14:50:43 2007 UTC vs.
Revision 1.67 by sf-exg, Fri Jul 23 19:18:52 2021 UTC

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
36#if defined(ENABLE_FRILLS) && defined(_POSIX_MEMLOCK) && _POSIX_MEMLOCK > 0
37# define ENABLE_MLOCK 1
38#endif
39
40#if ENABLE_MLOCK
41# include <sys/mman.h>
42#endif
43
36#include <cerrno> 44#include <errno.h>
45
46#include <libptytty.h>
37 47
38#include "rxvt.h" 48#include "rxvt.h"
39#include "rxvtdaemon.h" 49#include "rxvtdaemon.h"
40#include "libptytty.h"
41 50
42struct server : rxvt_connection { 51struct server : rxvt_connection
52{
43 log_callback log_cb; 53 log_callback log_cb;
44 getfd_callback getfd_cb; 54 getfd_callback getfd_cb;
45 55
46 void read_cb (ev::io &w, int revents); ev::io read_ev; 56 void read_cb (ev::io &w, int revents); ev::io read_ev;
47 void log_msg (const char *msg); 57 void log_msg (const char *msg);
48 int getfd (int remote_fd); 58 int getfd (int remote_fd);
49 59
50 server (int fd) 60 server (int fd)
51 : read_ev (this, &server::read_cb)
52 { 61 {
53 callback_set (log_cb , this, server, log_msg); 62 read_ev.set <server, &server::read_cb> (this);
54 callback_set (getfd_cb, this, server, getfd); 63 log_cb.set <server, &server::log_msg> (this);
64 getfd_cb.set<server, &server::getfd> (this);
65
55 this->fd = fd; 66 this->fd = fd;
56 fcntl (fd, F_SETFD, FD_CLOEXEC); 67 fcntl (fd, F_SETFD, FD_CLOEXEC);
57 fcntl (fd, F_SETFL, 0); 68 fcntl (fd, F_SETFL, 0);
58 read_ev.start (fd, ev::READ); 69 read_ev.start (fd, ev::READ);
59 } 70 }
60 71
61 void err (const char *format = 0, ...); 72 void err (const char *format = 0, ...);
62}; 73};
63 74
64struct unix_listener { 75struct unix_listener
76{
65 int fd; 77 int fd;
66 78
67 void accept_cb (ev::io &w, int revents); ev::io accept_ev; 79 void accept_cb (ev::io &w, int revents); ev::io accept_ev;
68 80
81 unix_listener (int fd);
69 unix_listener (const char *sockname); 82 static int open (const char *sockname);
70}; 83};
71 84
85unix_listener::unix_listener (int fd) : fd (fd)
86{
87 accept_ev.set<unix_listener, &unix_listener::accept_cb> (this);
88 fcntl (fd, F_SETFD, FD_CLOEXEC);
89 fcntl (fd, F_SETFL, O_NONBLOCK);
90 accept_ev.start (fd, ev::READ);
91}
92
72unix_listener::unix_listener (const char *sockname) 93int unix_listener::open (const char *sockname)
73: accept_ev (this, &unix_listener::accept_cb)
74{ 94{
75 sockaddr_un sa; 95 sockaddr_un sa;
76 96
77 if (strlen (sockname) >= sizeof(sa.sun_path)) 97 if (strlen (sockname) >= sizeof(sa.sun_path))
78 { 98 {
79 fputs ("socket name too long, aborting.\n", stderr); 99 fputs ("socket name too long, aborting.\n", stderr);
80 exit (EXIT_FAILURE); 100 exit (EXIT_FAILURE);
81 } 101 }
82 102
103 int fd;
83 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) 104 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
84 { 105 {
85 perror ("unable to create listening socket"); 106 perror ("unable to create listening socket");
86 exit (EXIT_FAILURE); 107 exit (EXIT_FAILURE);
87 } 108 }
88 109
89 fcntl (fd, F_SETFD, FD_CLOEXEC);
90 fcntl (fd, F_SETFL, O_NONBLOCK);
91
92 sa.sun_family = AF_UNIX; 110 sa.sun_family = AF_UNIX;
93 strcpy (sa.sun_path, sockname); 111 strcpy (sa.sun_path, sockname);
94 112
95 unlink (rxvt_connection::unix_sockname ()); 113 unlink (sockname);
96 114
97 mode_t omask = umask (0077); 115 mode_t omask = umask (0077);
98 116
99 if (bind (fd, (sockaddr *)&sa, sizeof (sa))) 117 if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
100 { 118 {
… …
108 { 126 {
109 perror ("unable to listen on socket"); 127 perror ("unable to listen on socket");
110 exit (EXIT_FAILURE); 128 exit (EXIT_FAILURE);
111 } 129 }
112 130
113 accept_ev.start (fd, ev::READ); 131 return fd;
114} 132}
115 133
116void unix_listener::accept_cb (ev::io &w, int revents) 134void unix_listener::accept_cb (ev::io &w, int revents)
117{ 135{
118 int fd2 = accept (fd, 0, 0); 136 int fd2 = accept (fd, 0, 0);
… …
170 188
171 if (!strcmp (tok, "END")) 189 if (!strcmp (tok, "END"))
172 break; 190 break;
173 else if (!strcmp (tok, "ENV") && recv (tok)) 191 else if (!strcmp (tok, "ENV") && recv (tok))
174 envv->push_back (strdup (tok)); 192 envv->push_back (strdup (tok));
175 else if (!strcmp (tok, "CWD") && recv (tok))
176 {
177 if (chdir (tok))
178 {
179 delete envv;
180 delete argv;
181 return err ("unable to change to working directory to '%s', aborting: %s.\n",
182 (char *)tok, strerror (errno));
183 }
184 }
185 else if (!strcmp (tok, "ARG") && recv (tok)) 193 else if (!strcmp (tok, "ARG") && recv (tok))
186 argv->push_back (strdup (tok)); 194 argv->push_back (strdup (tok));
187 else 195 else
188 return err ("protocol error: unexpected NEW token.\n"); 196 return err ("protocol error: unexpected NEW token.\n");
189 } 197 }
190 198
191 envv->push_back (0);
192
193 { 199 {
194 rxvt_term *term = new rxvt_term; 200 rxvt_term *term = new rxvt_term;
195 201
196 term->log_hook = &log_cb; 202 term->log_hook = &log_cb;
197 term->getfd_hook = &getfd_cb; 203 term->getfd_hook = &getfd_cb;
198 204
199 bool success; 205 bool success = true;
200 206
201 try 207 try
202 { 208 {
203 success = term->init (argv, envv); 209 term->init (argv, envv);
204 } 210 }
205 catch (const class rxvt_failure_exception &e) 211 catch (const std::exception &e)
206 { 212 {
213 log_msg (e.what());
207 success = false; 214 success = false;
208 } 215 }
209 216
210 term->log_hook = 0; 217 term->log_hook = 0;
211 218
212 chdir ("/"); 219 chdir ("/"); // init might change to different working directory
213 220
214 if (!success) 221 if (!success)
215 term->destroy (); 222 term->destroy ();
216 223
217 send ("END"); send (success ? 1 : 0); 224 send ("END"); send (success ? 1 : 0);
218 } 225 }
219 } 226 }
227 else if (!strcmp (tok, "QUIT"))
228 _exit (0);
220 else 229 else
221 return err ("protocol error: request '%s' unsupported.\n", (char *)tok); 230 return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
222 } 231 }
223 else 232 else
224 return err (); 233 return err ();
225} 234}
226 235
227int opt_fork, opt_opendisplay, opt_quiet; 236#ifdef ENABLE_FRILLS
237enum {
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
243static 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
228 277
229int 278int
230main (int argc, const char *const *argv) 279main (int argc, char *argv[])
231{ 280{
232 rxvt_init (); 281 try
282 {
283 ptytty::init ();
284 }
285 catch (const std::exception &e)
286 {
287 fputs (e.what (), stderr);
288 return EXIT_FAILURE;
289 }
290
291 static char opt_fork, opt_opendisplay, opt_quiet;
292#if ENABLE_PERL
293 static char *opt_eval;
294#endif
295#if ENABLE_MLOCK
296 static char opt_lock;
297#endif
233 298
234 for (int i = 1; i < argc; i++) 299 for (int i = 1; i < argc; i++)
235 { 300 {
236 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) 301 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
237 opt_fork = 1; 302 opt_fork = 1;
238 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) 303 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay"))
239 opt_opendisplay = 1; 304 opt_opendisplay = 1;
240 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) 305 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet"))
241 opt_quiet = 1; 306 opt_quiet = 1;
307#if ENABLE_MLOCK
308 else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock"))
309 opt_lock = 1;
310#endif
311#if ENABLE_PERL
312 else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval"))
313 opt_eval = argv [++i];
314#endif
242 else 315 else
243 { 316 {
244 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); 317 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
245 return EXIT_FAILURE; 318 return EXIT_FAILURE;
246 } 319 }
247 } 320 }
248 321
322 rxvt_init ();
323
324#if ENABLE_PERL
325 if (opt_eval)
326 {
327 rxvt_perl.init ();
328 rxvt_perl.eval (opt_eval);
329 }
330#endif
331
332 // optionally open display and never release it.
333 if (opt_opendisplay)
334 if (const char *dpy = getenv ("DISPLAY"))
335 displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?
336
337 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 {
357 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 }
366
367 unix_listener l (fd);
368
249 chdir ("/"); 369 chdir ("/");
250 370
251 if (opt_opendisplay) 371 pid_t pid = 0;
252 displays.get (getenv ("DISPLAY")); // open display and never release it
253
254 char *sockname = rxvt_connection::unix_sockname ();
255 unix_listener l (sockname);
256
257 if (!opt_quiet)
258 {
259 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
260 fflush (stdout);
261 }
262
263 free (sockname);
264
265 if (opt_fork) 372 if (opt_fork)
266 { 373 {
267 pid_t pid = fork (); 374 pid = fork ();
375 }
268 376
377#if ENABLE_MLOCK
378 // 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#endif
383
384 if (opt_fork)
385 {
269 if (pid < 0) 386 if (pid < 0)
270 { 387 {
271 rxvt_log ("unable to fork daemon, aborting.\n"); 388 rxvt_log ("unable to fork daemon, aborting.\n");
272 return EXIT_FAILURE; 389 return EXIT_FAILURE;
273 } 390 }
274 else if (pid > 0) 391 else if (pid > 0)
275 _exit (EXIT_SUCCESS); 392 _exit (EXIT_SUCCESS);
276 393
277 ev_default_fork (); 394 ev_loop_fork (EV_DEFAULT_UC);
278 } 395 }
279 396
280 ev_loop (0); 397 ev_run ();
281 398
282 return EXIT_SUCCESS; 399 return EXIT_SUCCESS;
283} 400}
284 401

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