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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 1.65 by sf-exg, Sat Jun 26 14:42:36 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>
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
42struct server : rxvt_connection { 50struct 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)
52 { 60 {
53 callback_set (log_cb , this, server, log_msg); 61 read_ev.set <server, &server::read_cb> (this);
54 callback_set (getfd_cb, this, server, getfd); 62 log_cb.set <server, &server::log_msg> (this);
63 getfd_cb.set<server, &server::getfd> (this);
64
55 this->fd = fd; 65 this->fd = fd;
56 fcntl (fd, F_SETFD, FD_CLOEXEC); 66 fcntl (fd, F_SETFD, FD_CLOEXEC);
57 fcntl (fd, F_SETFL, 0); 67 fcntl (fd, F_SETFL, 0);
58 read_ev.start (fd, ev::READ); 68 read_ev.start (fd, ev::READ);
59 } 69 }
60 70
61 void err (const char *format = 0, ...); 71 void err (const char *format = 0, ...);
62}; 72};
63 73
64struct unix_listener { 74struct unix_listener
75{
65 int fd; 76 int fd;
66 77
67 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;
68 79
80 unix_listener (int fd);
69 unix_listener (const char *sockname); 81 static int open (const char *sockname);
70}; 82};
71 83
84unix_listener::unix_listener (int fd) : fd (fd)
85{
86 accept_ev.set<unix_listener, &unix_listener::accept_cb> (this);
87 fcntl (fd, F_SETFD, FD_CLOEXEC);
88 fcntl (fd, F_SETFL, O_NONBLOCK);
89 accept_ev.start (fd, ev::READ);
90}
91
72unix_listener::unix_listener (const char *sockname) 92int unix_listener::open (const char *sockname)
73: accept_ev (this, &unix_listener::accept_cb)
74{ 93{
75 sockaddr_un sa; 94 sockaddr_un sa;
76 95
77 if (strlen (sockname) >= sizeof(sa.sun_path)) 96 if (strlen (sockname) >= sizeof(sa.sun_path))
78 { 97 {
79 fputs ("socket name too long, aborting.\n", stderr); 98 fputs ("socket name too long, aborting.\n", stderr);
80 exit (EXIT_FAILURE); 99 exit (EXIT_FAILURE);
81 } 100 }
82 101
102 int fd;
83 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) 103 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
84 { 104 {
85 perror ("unable to create listening socket"); 105 perror ("unable to create listening socket");
86 exit (EXIT_FAILURE); 106 exit (EXIT_FAILURE);
87 } 107 }
88 108
89 fcntl (fd, F_SETFD, FD_CLOEXEC);
90 fcntl (fd, F_SETFL, O_NONBLOCK);
91
92 sa.sun_family = AF_UNIX; 109 sa.sun_family = AF_UNIX;
93 strcpy (sa.sun_path, sockname); 110 strcpy (sa.sun_path, sockname);
94 111
95 unlink (rxvt_connection::unix_sockname ()); 112 unlink (sockname);
96 113
97 mode_t omask = umask (0077); 114 mode_t omask = umask (0077);
98 115
99 if (bind (fd, (sockaddr *)&sa, sizeof (sa))) 116 if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
100 { 117 {
… …
108 { 125 {
109 perror ("unable to listen on socket"); 126 perror ("unable to listen on socket");
110 exit (EXIT_FAILURE); 127 exit (EXIT_FAILURE);
111 } 128 }
112 129
113 accept_ev.start (fd, ev::READ); 130 return fd;
114} 131}
115 132
116void unix_listener::accept_cb (ev::io &w, int revents) 133void unix_listener::accept_cb (ev::io &w, int revents)
117{ 134{
118 int fd2 = accept (fd, 0, 0); 135 int fd2 = accept (fd, 0, 0);
… …
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))
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)) 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);
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 class rxvt_failure_exception &e)
206 { 211 {
207 success = false; 212 success = false;
208 } 213 }
214 catch (const std::exception &e)
215 {
216 log_msg (e.what());
217 success = false;
218 }
209 219
210 term->log_hook = 0; 220 term->log_hook = 0;
211 221
212 chdir ("/"); 222 chdir ("/"); // init might change to different working directory
213 223
214 if (!success) 224 if (!success)
215 term->destroy (); 225 term->destroy ();
216 226
217 send ("END"); send (success ? 1 : 0); 227 send ("END"); send (success ? 1 : 0);
218 } 228 }
219 } 229 }
230 else if (!strcmp (tok, "QUIT"))
231 _exit (0);
220 else 232 else
221 return err ("protocol error: request '%s' unsupported.\n", (char *)tok); 233 return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
222 } 234 }
223 else 235 else
224 return err (); 236 return err ();
225} 237}
226 238
227int opt_fork, opt_opendisplay, opt_quiet; 239#ifdef ENABLE_FRILLS
240enum {
241 SD_LISTEN_FDS_START = 3,
242};
243
244// https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html
245// https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c
246static int get_listen_fds ()
247{
248 const char *listen_pid = getenv ("LISTEN_PID");
249 if (!listen_pid)
250 return 0;
251
252 char *end;
253 errno = 0;
254 long pid = strtol (listen_pid, &end, 10);
255 if (errno || end == listen_pid || *end)
256 return -1;
257
258 if (getpid () != pid)
259 return 0;
260
261 const char *listen_fds = getenv ("LISTEN_FDS");
262 if (!listen_fds)
263 return 0;
264
265 errno = 0;
266 long n = strtol (listen_fds, &end, 10);
267 if (errno || end == listen_fds || *end)
268 return -1;
269
270 if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START)
271 return -1;
272
273 unsetenv ("LISTEN_PID");
274 unsetenv ("LISTEN_FDS");
275 unsetenv ("LISTEN_FDNAMES");
276
277 return n;
278}
279#endif
228 280
229int 281int
230main (int argc, const char *const *argv) 282main (int argc, char *argv[])
231{ 283{
232 rxvt_init (); 284 try
285 {
286 ptytty::init ();
287 }
288 catch (const std::exception &e)
289 {
290 fputs (e.what (), stderr);
291 return EXIT_FAILURE;
292 }
293
294 static char opt_fork, opt_opendisplay, opt_quiet;
295#if ENABLE_PERL
296 static char *opt_eval;
297#endif
298#if ENABLE_MLOCK
299 static char opt_lock;
300#endif
233 301
234 for (int i = 1; i < argc; i++) 302 for (int i = 1; i < argc; i++)
235 { 303 {
236 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) 304 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
237 opt_fork = 1; 305 opt_fork = 1;
238 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) 306 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay"))
239 opt_opendisplay = 1; 307 opt_opendisplay = 1;
240 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) 308 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet"))
241 opt_quiet = 1; 309 opt_quiet = 1;
310#if ENABLE_MLOCK
311 else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock"))
312 opt_lock = 1;
313#endif
314#if ENABLE_PERL
315 else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval"))
316 opt_eval = argv [++i];
317#endif
242 else 318 else
243 { 319 {
244 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); 320 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
245 return EXIT_FAILURE; 321 return EXIT_FAILURE;
246 } 322 }
247 } 323 }
248 324
325 rxvt_init ();
326
327#if ENABLE_PERL
328 if (opt_eval)
329 {
330 rxvt_perl.init ();
331 rxvt_perl.eval (opt_eval);
332 }
333#endif
334
335 // optionally open display and never release it.
336 if (opt_opendisplay)
337 if (const char *dpy = getenv ("DISPLAY"))
338 displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?
339
340 int fd;
341#ifdef ENABLE_FRILLS
342 int n = get_listen_fds ();
343 if (n > 1)
344 {
345 fputs ("received multiple file descriptors, aborting.\n", stderr);
346 exit (EXIT_FAILURE);
347 }
348 else if (n == 1)
349 {
350 fd = SD_LISTEN_FDS_START;
351 if (!opt_quiet)
352 {
353 printf ("rxvt-unicode daemon listening on fd.\n");
354 fflush (stdout);
355 }
356 }
357 else
358#endif
359 {
360 char *sockname = rxvt_connection::unix_sockname ();
361 fd = unix_listener::open (sockname);
362 if (!opt_quiet)
363 {
364 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
365 fflush (stdout);
366 }
367 free (sockname);
368 }
369
370 unix_listener l (fd);
371
249 chdir ("/"); 372 chdir ("/");
250 373
251 if (opt_opendisplay) 374 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) 375 if (opt_fork)
266 { 376 {
267 pid_t pid = fork (); 377 pid = fork ();
378 }
268 379
380#if ENABLE_MLOCK
381 // Optionally perform an mlockall so this process does not get swapped out.
382 if (opt_lock && !pid)
383 if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0)
384 perror ("unable to lock into ram");
385#endif
386
387 if (opt_fork)
388 {
269 if (pid < 0) 389 if (pid < 0)
270 { 390 {
271 rxvt_log ("unable to fork daemon, aborting.\n"); 391 rxvt_log ("unable to fork daemon, aborting.\n");
272 return EXIT_FAILURE; 392 return EXIT_FAILURE;
273 } 393 }
274 else if (pid > 0) 394 else if (pid > 0)
275 _exit (EXIT_SUCCESS); 395 _exit (EXIT_SUCCESS);
276 396
277 ev_default_fork (); 397 ev_loop_fork (EV_DEFAULT_UC);
278 } 398 }
279 399
280 ev_loop (0); 400 ev_run ();
281 401
282 return EXIT_SUCCESS; 402 return EXIT_SUCCESS;
283} 403}
284 404

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