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Comparing rxvt-unicode/src/rxvtd.C (file contents):
Revision 1.25 by root, Tue Jan 17 15:43:49 2006 UTC vs.
Revision 1.67 by sf-exg, Fri Jul 23 19:18:52 2021 UTC

1/*--------------------------------*-C-*---------------------------------* 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) 2003-2004 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 "rxvt.h"
25#include "rxvtdaemon.h"
26#include "fdpass.h"
27#include "iom.h"
28
29#include <cstdio> 24#include <stdio.h>
30#include <cstdlib> 25#include <stdlib.h>
31#include <cstdarg> 26#include <stdarg.h>
32#include <cstring> 27#include <string.h>
33 28
34#include <unistd.h> 29#include <unistd.h>
35#include <fcntl.h> 30#include <fcntl.h>
36#include <sys/types.h> 31#include <sys/types.h>
37#include <sys/stat.h> 32#include <sys/stat.h>
38#include <sys/socket.h> 33#include <sys/socket.h>
39#include <sys/un.h> 34#include <sys/un.h>
40 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
41#include <cerrno> 44#include <errno.h>
42 45
43extern char **environ; 46#include <libptytty.h>
44 47
48#include "rxvt.h"
49#include "rxvtdaemon.h"
50
45struct server : rxvt_connection { 51struct server : rxvt_connection
52{
46 log_callback log_cb; 53 log_callback log_cb;
47 getfd_callback getfd_cb; 54 getfd_callback getfd_cb;
48 55
49 void read_cb (io_watcher &w, short revents); io_watcher read_ev; 56 void read_cb (ev::io &w, int revents); ev::io read_ev;
50 void log_msg (const char *msg); 57 void log_msg (const char *msg);
51 int getfd (int remote_fd); 58 int getfd (int remote_fd);
52 59
53 server (int fd) 60 server (int fd)
54 : read_ev (this, &server::read_cb),
55 log_cb (this, &server::log_msg),
56 getfd_cb (this, &server::getfd)
57 { 61 {
62 read_ev.set <server, &server::read_cb> (this);
63 log_cb.set <server, &server::log_msg> (this);
64 getfd_cb.set<server, &server::getfd> (this);
65
58 this->fd = fd; 66 this->fd = fd;
67 fcntl (fd, F_SETFD, FD_CLOEXEC);
68 fcntl (fd, F_SETFL, 0);
59 read_ev.start (fd, EVENT_READ); 69 read_ev.start (fd, ev::READ);
60 } 70 }
61 71
62 void err (const char *format = 0, ...); 72 void err (const char *format = 0, ...);
63}; 73};
64 74
65struct unix_listener { 75struct unix_listener
76{
66 int fd; 77 int fd;
67 78
68 void accept_cb (io_watcher &w, short revents); io_watcher accept_ev; 79 void accept_cb (ev::io &w, int revents); ev::io accept_ev;
69 80
81 unix_listener (int fd);
70 unix_listener (const char *sockname); 82 static int open (const char *sockname);
71}; 83};
72 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
73unix_listener::unix_listener (const char *sockname) 93int unix_listener::open (const char *sockname)
74: accept_ev (this, &unix_listener::accept_cb)
75{ 94{
95 sockaddr_un sa;
96
97 if (strlen (sockname) >= sizeof(sa.sun_path))
98 {
99 fputs ("socket name too long, aborting.\n", stderr);
100 exit (EXIT_FAILURE);
101 }
102
103 int fd;
76 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) 104 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
77 { 105 {
78 perror ("unable to create listening socket"); 106 perror ("unable to create listening socket");
79 exit (EXIT_FAILURE); 107 exit (EXIT_FAILURE);
80 } 108 }
81 109
82 fcntl (fd, F_SETFD, FD_CLOEXEC);
83
84 sockaddr_un sa;
85
86 sa.sun_family = AF_UNIX; 110 sa.sun_family = AF_UNIX;
87 strcpy (sa.sun_path, sockname); 111 strcpy (sa.sun_path, sockname);
88 112
89 unlink (rxvt_connection::unix_sockname ()); 113 unlink (sockname);
90 114
91 mode_t omask = umask (0077); 115 mode_t omask = umask (0077);
92 116
93 if (bind (fd, (sockaddr *)&sa, sizeof (sa))) 117 if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
94 { 118 {
… …
102 { 126 {
103 perror ("unable to listen on socket"); 127 perror ("unable to listen on socket");
104 exit (EXIT_FAILURE); 128 exit (EXIT_FAILURE);
105 } 129 }
106 130
107 accept_ev.start (fd, EVENT_READ); 131 return fd;
108} 132}
109 133
110void unix_listener::accept_cb (io_watcher &w, short revents) 134void unix_listener::accept_cb (ev::io &w, int revents)
111{ 135{
112 int fd2 = accept (fd, 0, 0); 136 int fd2 = accept (fd, 0, 0);
113 137
114 if (fd2 >= 0) 138 if (fd2 >= 0)
115 {
116 fcntl (fd2, F_SETFD, FD_CLOEXEC);
117 new server (fd2); 139 new server (fd2);
118 }
119} 140}
120 141
121int server::getfd (int remote_fd) 142int server::getfd (int remote_fd)
122{ 143{
123 send ("GETFD"); 144 send ("GETFD");
124 send (remote_fd); 145 send (remote_fd);
125 return rxvt_recv_fd (fd); 146 return ptytty::recv_fd (fd);
126} 147}
127 148
128void server::log_msg (const char *msg) 149void server::log_msg (const char *msg)
129{ 150{
130 send ("MSG"), send (msg); 151 send ("MSG"), send (msg);
… …
139 va_list ap; 160 va_list ap;
140 va_start (ap, format); 161 va_start (ap, format);
141 vsnprintf (err, 1024, format, ap); 162 vsnprintf (err, 1024, format, ap);
142 va_end (ap); 163 va_end (ap);
143 164
144 send ("MSG"), send (err); 165 log_msg (err);
145 } 166 }
146 167
147 send ("END", 0); 168 send ("END"), send (0);
148 close (fd); 169 close (fd);
149 delete this; 170 delete this;
150} 171}
151 172
152void server::read_cb (io_watcher &w, short revents) 173void server::read_cb (ev::io &w, int revents)
153{ 174{
154 auto_str tok; 175 auto_str tok;
155 176
156 if (recv (tok)) 177 if (recv (tok))
157 { 178 {
158 if (!strcmp (tok, "NEW")) 179 if (!strcmp (tok, "NEW"))
159 { 180 {
160 stringvec *argv = new stringvec; 181 stringvec *argv = new stringvec;
161 stringvec *envv = new stringvec; 182 stringvec *envv = new stringvec;
162 183
163 for (;;) 184 for (;;)
164 { 185 {
165 if (!recv (tok)) 186 if (!recv (tok))
166 return err (); 187 return err ();
167 188
168 if (!strcmp (tok, "END")) 189 if (!strcmp (tok, "END"))
169 break; 190 break;
170 else if (!strcmp (tok, "ENV") && recv (tok)) 191 else if (!strcmp (tok, "ENV") && recv (tok))
171 envv->push_back (tok.get ()); 192 envv->push_back (strdup (tok));
172 else if (!strcmp (tok, "CWD") && recv (tok))
173 {
174 if (chdir (tok))
175 err ("unable to change to working directory to '%s': %s",
176 (char *)tok, strerror (errno));
177 }
178 else if (!strcmp (tok, "ARG") && recv (tok)) 193 else if (!strcmp (tok, "ARG") && recv (tok))
179 argv->push_back (tok.get ()); 194 argv->push_back (strdup (tok));
180 else 195 else
181 return err ("protocol error: unexpected NEW token"); 196 return err ("protocol error: unexpected NEW token.\n");
182 } 197 }
183
184 envv->push_back (0);
185 198
186 { 199 {
187 rxvt_term *term = new rxvt_term; 200 rxvt_term *term = new rxvt_term;
188 201
189 term->log_hook = &log_cb; 202 term->log_hook = &log_cb;
190 term->getfd_hook = &getfd_cb; 203 term->getfd_hook = &getfd_cb;
191 term->argv = argv;
192 term->envv = envv;
193 204
194 bool success; 205 bool success = true;
195 206
196 try 207 try
197 { 208 {
198 success = term->init (argv->size (), argv->begin ()); 209 term->init (argv, envv);
199 } 210 }
200 catch (const class rxvt_failure_exception &e) 211 catch (const std::exception &e)
201 { 212 {
213 log_msg (e.what());
202 success = false; 214 success = false;
203 } 215 }
204 216
205 term->log_hook = 0; 217 term->log_hook = 0;
206 218
207 chdir ("/"); 219 chdir ("/"); // init might change to different working directory
208 220
209 if (!success) 221 if (!success)
210 term->destroy (); 222 term->destroy ();
211 223
212 send ("END"); send (success ? 1 : 0); 224 send ("END"); send (success ? 1 : 0);
213 } 225 }
214 } 226 }
227 else if (!strcmp (tok, "QUIT"))
228 _exit (0);
215 else 229 else
216 return err ("protocol error: request '%s' unsupported.", (char *)tok); 230 return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
217 } 231 }
218 else 232 else
219 return err (); 233 return err ();
220} 234}
221 235
222int 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
223 277
224int 278int
225main (int argc, const char *const *argv) 279main (int argc, char *argv[])
226{ 280{
227 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
228 298
229 for (int i = 1; i < argc; i++) 299 for (int i = 1; i < argc; i++)
230 { 300 {
231 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) 301 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
232 opt_fork = 1; 302 opt_fork = 1;
233 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) 303 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay"))
234 opt_opendisplay = 1; 304 opt_opendisplay = 1;
235 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) 305 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet"))
236 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
237 else 315 else
238 { 316 {
239 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]);
240 return EXIT_FAILURE; 318 return EXIT_FAILURE;
241 } 319 }
242 } 320 }
243 321
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
244 chdir ("/"); 369 chdir ("/");
245 370
246 if (opt_opendisplay) 371 pid_t pid = 0;
247 displays.get (getenv ("DISPLAY")); // open display and never release it
248
249 char *sockname = rxvt_connection::unix_sockname ();
250 unix_listener l (sockname);
251
252 if (!opt_quiet)
253 {
254 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
255 fflush (stdout);
256 }
257
258 free (sockname);
259
260 if (opt_fork) 372 if (opt_fork)
261 { 373 {
262 pid_t pid = fork (); 374 pid = fork ();
375 }
263 376
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 {
264 if (pid < 0) 386 if (pid < 0)
265 { 387 {
266 rxvt_log ("unable to fork daemon, aborting.\n"); 388 rxvt_log ("unable to fork daemon, aborting.\n");
267 return EXIT_FAILURE; 389 return EXIT_FAILURE;
268 } 390 }
269 else if (pid > 0) 391 else if (pid > 0)
270 _exit (EXIT_SUCCESS); 392 _exit (EXIT_SUCCESS);
271 }
272 393
273 io_manager::loop (); 394 ev_loop_fork (EV_DEFAULT_UC);
395 }
396
397 ev_run ();
274 398
275 return EXIT_SUCCESS; 399 return EXIT_SUCCESS;
276} 400}
277 401

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