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Comparing rxvt-unicode/src/rxvtd.C (file contents):
Revision 1.47 by root, Mon Feb 2 22:38:40 2009 UTC vs.
Revision 1.66 by sf-exg, Sat Jun 26 14:44:30 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) 2003-2007 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>
… …
39 39
40#if ENABLE_MLOCK 40#if ENABLE_MLOCK
41# include <sys/mman.h> 41# include <sys/mman.h>
42#endif 42#endif
43 43
44#include <cerrno> 44#include <errno.h>
45 45
46#include "rxvt.h" 46#include "rxvt.h"
47#include "rxvtdaemon.h" 47#include "rxvtdaemon.h"
48#include "libptytty.h" 48#include "libptytty.h"
49 49
50struct server : rxvt_connection { 50struct server : rxvt_connection
51{
51 log_callback log_cb; 52 log_callback log_cb;
52 getfd_callback getfd_cb; 53 getfd_callback getfd_cb;
53 54
54 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;
55 void log_msg (const char *msg); 56 void log_msg (const char *msg);
… …
68 } 69 }
69 70
70 void err (const char *format = 0, ...); 71 void err (const char *format = 0, ...);
71}; 72};
72 73
73struct unix_listener { 74struct unix_listener
75{
74 int fd; 76 int fd;
75 77
76 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;
77 79
80 unix_listener (int fd);
78 unix_listener (const char *sockname); 81 static int open (const char *sockname);
79}; 82};
80 83
81unix_listener::unix_listener (const char *sockname) 84unix_listener::unix_listener (int fd) : fd (fd)
82{ 85{
83 accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); 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}
84 91
92int unix_listener::open (const char *sockname)
93{
85 sockaddr_un sa; 94 sockaddr_un sa;
86 95
87 if (strlen (sockname) >= sizeof(sa.sun_path)) 96 if (strlen (sockname) >= sizeof(sa.sun_path))
88 { 97 {
89 fputs ("socket name too long, aborting.\n", stderr); 98 fputs ("socket name too long, aborting.\n", stderr);
90 exit (EXIT_FAILURE); 99 exit (EXIT_FAILURE);
91 } 100 }
92 101
102 int fd;
93 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) 103 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
94 { 104 {
95 perror ("unable to create listening socket"); 105 perror ("unable to create listening socket");
96 exit (EXIT_FAILURE); 106 exit (EXIT_FAILURE);
97 } 107 }
98 108
99 fcntl (fd, F_SETFD, FD_CLOEXEC);
100 fcntl (fd, F_SETFL, O_NONBLOCK);
101
102 sa.sun_family = AF_UNIX; 109 sa.sun_family = AF_UNIX;
103 strcpy (sa.sun_path, sockname); 110 strcpy (sa.sun_path, sockname);
104 111
105 unlink (rxvt_connection::unix_sockname ()); 112 unlink (sockname);
106 113
107 mode_t omask = umask (0077); 114 mode_t omask = umask (0077);
108 115
109 if (bind (fd, (sockaddr *)&sa, sizeof (sa))) 116 if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
110 { 117 {
… …
118 { 125 {
119 perror ("unable to listen on socket"); 126 perror ("unable to listen on socket");
120 exit (EXIT_FAILURE); 127 exit (EXIT_FAILURE);
121 } 128 }
122 129
123 accept_ev.start (fd, ev::READ); 130 return fd;
124} 131}
125 132
126void unix_listener::accept_cb (ev::io &w, int revents) 133void unix_listener::accept_cb (ev::io &w, int revents)
127{ 134{
128 int fd2 = accept (fd, 0, 0); 135 int fd2 = accept (fd, 0, 0);
… …
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;
… …
200 205
201 try 206 try
202 { 207 {
203 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 {
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
… …
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 }
226 else if (!strcmp (tok, "QUIT"))
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
235#ifdef ENABLE_FRILLS
236enum {
237 SD_LISTEN_FDS_START = 3,
238};
239
240// https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html
241// https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c
242static int get_listen_fds ()
243{
244 const char *listen_pid = getenv ("LISTEN_PID");
245 if (!listen_pid)
246 return 0;
247
248 char *end;
249 errno = 0;
250 long pid = strtol (listen_pid, &end, 10);
251 if (errno || end == listen_pid || *end)
252 return -1;
253
254 if (getpid () != pid)
255 return 0;
256
257 const char *listen_fds = getenv ("LISTEN_FDS");
258 if (!listen_fds)
259 return 0;
260
261 errno = 0;
262 long n = strtol (listen_fds, &end, 10);
263 if (errno || end == listen_fds || *end)
264 return -1;
265
266 if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START)
267 return -1;
268
269 unsetenv ("LISTEN_PID");
270 unsetenv ("LISTEN_FDS");
271 unsetenv ("LISTEN_FDNAMES");
272
273 return n;
274}
275#endif
276
277int
278main (int argc, char *argv[])
279{
280 try
281 {
282 ptytty::init ();
283 }
284 catch (const std::exception &e)
285 {
286 fputs (e.what (), stderr);
287 return EXIT_FAILURE;
288 }
289
227int opt_fork, opt_opendisplay, opt_quiet; 290 static char opt_fork, opt_opendisplay, opt_quiet;
291#if ENABLE_PERL
292 static char *opt_eval;
293#endif
228#if ENABLE_MLOCK 294#if ENABLE_MLOCK
229int opt_lock; 295 static char opt_lock;
230#endif 296#endif
231
232int
233main (int argc, const char *const *argv)
234{
235 rxvt_init ();
236 297
237 for (int i = 1; i < argc; i++) 298 for (int i = 1; i < argc; i++)
238 { 299 {
239 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) 300 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
240 opt_fork = 1; 301 opt_fork = 1;
… …
244 opt_quiet = 1; 305 opt_quiet = 1;
245#if ENABLE_MLOCK 306#if ENABLE_MLOCK
246 else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) 307 else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock"))
247 opt_lock = 1; 308 opt_lock = 1;
248#endif 309#endif
310#if ENABLE_PERL
311 else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval"))
312 opt_eval = argv [++i];
313#endif
249 else 314 else
250 { 315 {
251 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]);
252 return EXIT_FAILURE; 317 return EXIT_FAILURE;
253 } 318 }
254 } 319 }
255 320
321 rxvt_init ();
322
323#if ENABLE_PERL
324 if (opt_eval)
325 {
326 rxvt_perl.init ();
327 rxvt_perl.eval (opt_eval);
328 }
329#endif
330
256 // optionally open display and never release it. 331 // optionally open display and never release it.
257 if (opt_opendisplay) 332 if (opt_opendisplay)
258 if (const char *dpy = getenv ("DISPLAY")) 333 if (const char *dpy = getenv ("DISPLAY"))
259 displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? 334 displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?
260 335
336 int fd;
337#ifdef ENABLE_FRILLS
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 {
346 fd = SD_LISTEN_FDS_START;
347 if (!opt_quiet)
348 {
349 printf ("rxvt-unicode daemon listening on fd.\n");
350 fflush (stdout);
351 }
352 }
353 else
354#endif
355 {
261 char *sockname = rxvt_connection::unix_sockname (); 356 char *sockname = rxvt_connection::unix_sockname ();
357 fd = unix_listener::open (sockname);
358 if (!opt_quiet)
359 {
360 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
361 fflush (stdout);
362 }
363 free (sockname);
364 }
365
262 unix_listener l (sockname); 366 unix_listener l (fd);
263 367
264 chdir ("/"); 368 chdir ("/");
265
266 if (!opt_quiet)
267 {
268 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
269 fflush (stdout);
270 }
271
272 free (sockname);
273 369
274 pid_t pid = 0; 370 pid_t pid = 0;
275 if (opt_fork) 371 if (opt_fork)
276 { 372 {
277 pid = fork (); 373 pid = fork ();
278 } 374 }
279 375
280#if ENABLE_MLOCK 376#if ENABLE_MLOCK
281 // Optionally preform a mlockall so this process does not get swapped out. 377 // Optionally perform an mlockall so this process does not get swapped out.
282 if (opt_lock && pid == 0) 378 if (opt_lock && !pid)
283 if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) 379 if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0)
284 perror("unable to lock into ram"); 380 perror ("unable to lock into ram");
285#endif 381#endif
286 382
287 if (opt_fork) 383 if (opt_fork)
288 { 384 {
289 if (pid < 0) 385 if (pid < 0)
… …
292 return EXIT_FAILURE; 388 return EXIT_FAILURE;
293 } 389 }
294 else if (pid > 0) 390 else if (pid > 0)
295 _exit (EXIT_SUCCESS); 391 _exit (EXIT_SUCCESS);
296 392
297 ev_default_fork (); 393 ev_loop_fork (EV_DEFAULT_UC);
298 } 394 }
299 395
300 ev_loop (0); 396 ev_run ();
301 397
302 return EXIT_SUCCESS; 398 return EXIT_SUCCESS;
303} 399}
304 400

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