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Comparing rxvt-unicode/src/rxvtd.C (file contents):
Revision 1.26 by root, Sun Jan 22 00:36:59 2006 UTC vs.
Revision 1.63 by sf-exg, Sun May 9 05:53:12 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 "rxvt.h"
47#include "rxvtdaemon.h"
48#include "libptytty.h"
44 49
45struct server : rxvt_connection { 50struct server : rxvt_connection {
46 log_callback log_cb; 51 log_callback log_cb;
47 getfd_callback getfd_cb; 52 getfd_callback getfd_cb;
48 53
49 void read_cb (io_watcher &w, short revents); io_watcher read_ev; 54 void read_cb (ev::io &w, int revents); ev::io read_ev;
50 void log_msg (const char *msg); 55 void log_msg (const char *msg);
51 int getfd (int remote_fd); 56 int getfd (int remote_fd);
52 57
53 server (int fd) 58 server (int fd)
54 : read_ev (this, &server::read_cb),
55 log_cb (this, &server::log_msg),
56 getfd_cb (this, &server::getfd)
57 { 59 {
60 read_ev.set <server, &server::read_cb> (this);
61 log_cb.set <server, &server::log_msg> (this);
62 getfd_cb.set<server, &server::getfd> (this);
63
58 this->fd = fd; 64 this->fd = fd;
65 fcntl (fd, F_SETFD, FD_CLOEXEC);
66 fcntl (fd, F_SETFL, 0);
59 read_ev.start (fd, EVENT_READ); 67 read_ev.start (fd, ev::READ);
60 } 68 }
61 69
62 void err (const char *format = 0, ...); 70 void err (const char *format = 0, ...);
63}; 71};
64 72
65struct unix_listener { 73struct unix_listener {
66 int fd; 74 int fd;
67 75
68 void accept_cb (io_watcher &w, short revents); io_watcher accept_ev; 76 void accept_cb (ev::io &w, int revents); ev::io accept_ev;
69 77
78 unix_listener (int fd);
70 unix_listener (const char *sockname); 79 static int open (const char *sockname);
71}; 80};
72 81
82unix_listener::unix_listener (int fd) : fd (fd)
83{
84 accept_ev.set<unix_listener, &unix_listener::accept_cb> (this);
85 fcntl (fd, F_SETFD, FD_CLOEXEC);
86 fcntl (fd, F_SETFL, O_NONBLOCK);
87 accept_ev.start (fd, ev::READ);
88}
89
73unix_listener::unix_listener (const char *sockname) 90int unix_listener::open (const char *sockname)
74: accept_ev (this, &unix_listener::accept_cb)
75{ 91{
92 sockaddr_un sa;
93
94 if (strlen (sockname) >= sizeof(sa.sun_path))
95 {
96 fputs ("socket name too long, aborting.\n", stderr);
97 exit (EXIT_FAILURE);
98 }
99
100 int fd;
76 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) 101 if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
77 { 102 {
78 perror ("unable to create listening socket"); 103 perror ("unable to create listening socket");
79 exit (EXIT_FAILURE); 104 exit (EXIT_FAILURE);
80 } 105 }
81
82 fcntl (fd, F_SETFD, FD_CLOEXEC);
83
84 sockaddr_un sa;
85 106
86 sa.sun_family = AF_UNIX; 107 sa.sun_family = AF_UNIX;
87 strcpy (sa.sun_path, sockname); 108 strcpy (sa.sun_path, sockname);
88 109
89 unlink (rxvt_connection::unix_sockname ()); 110 unlink (sockname);
90 111
91 mode_t omask = umask (0077); 112 mode_t omask = umask (0077);
92 113
93 if (bind (fd, (sockaddr *)&sa, sizeof (sa))) 114 if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
94 { 115 {
… …
102 { 123 {
103 perror ("unable to listen on socket"); 124 perror ("unable to listen on socket");
104 exit (EXIT_FAILURE); 125 exit (EXIT_FAILURE);
105 } 126 }
106 127
107 accept_ev.start (fd, EVENT_READ); 128 return fd;
108} 129}
109 130
110void unix_listener::accept_cb (io_watcher &w, short revents) 131void unix_listener::accept_cb (ev::io &w, int revents)
111{ 132{
112 int fd2 = accept (fd, 0, 0); 133 int fd2 = accept (fd, 0, 0);
113 134
114 if (fd2 >= 0) 135 if (fd2 >= 0)
115 {
116 fcntl (fd2, F_SETFD, FD_CLOEXEC);
117 new server (fd2); 136 new server (fd2);
118 }
119} 137}
120 138
121int server::getfd (int remote_fd) 139int server::getfd (int remote_fd)
122{ 140{
123 send ("GETFD"); 141 send ("GETFD");
124 send (remote_fd); 142 send (remote_fd);
125 return rxvt_recv_fd (fd); 143 return ptytty::recv_fd (fd);
126} 144}
127 145
128void server::log_msg (const char *msg) 146void server::log_msg (const char *msg)
129{ 147{
130 send ("MSG"), send (msg); 148 send ("MSG"), send (msg);
… …
139 va_list ap; 157 va_list ap;
140 va_start (ap, format); 158 va_start (ap, format);
141 vsnprintf (err, 1024, format, ap); 159 vsnprintf (err, 1024, format, ap);
142 va_end (ap); 160 va_end (ap);
143 161
144 send ("MSG"), send (err); 162 log_msg (err);
145 } 163 }
146 164
147 send ("END", 0); 165 send ("END"), send (0);
148 close (fd); 166 close (fd);
149 delete this; 167 delete this;
150} 168}
151 169
152void server::read_cb (io_watcher &w, short revents) 170void server::read_cb (ev::io &w, int revents)
153{ 171{
154 auto_str tok; 172 auto_str tok;
155 173
156 if (recv (tok)) 174 if (recv (tok))
157 { 175 {
158 if (!strcmp (tok, "NEW")) 176 if (!strcmp (tok, "NEW"))
159 { 177 {
160 stringvec *argv = new stringvec; 178 stringvec *argv = new stringvec;
161 stringvec *envv = new stringvec; 179 stringvec *envv = new stringvec;
162 180
163 for (;;) 181 for (;;)
164 { 182 {
165 if (!recv (tok)) 183 if (!recv (tok))
166 return err (); 184 return err ();
167 185
168 if (!strcmp (tok, "END")) 186 if (!strcmp (tok, "END"))
169 break; 187 break;
170 else if (!strcmp (tok, "ENV") && recv (tok)) 188 else if (!strcmp (tok, "ENV") && recv (tok))
171 envv->push_back (strdup (tok)); 189 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)) 190 else if (!strcmp (tok, "ARG") && recv (tok))
179 argv->push_back (strdup (tok)); 191 argv->push_back (strdup (tok));
180 else 192 else
181 return err ("protocol error: unexpected NEW token"); 193 return err ("protocol error: unexpected NEW token.\n");
182 } 194 }
183
184 envv->push_back (0);
185 195
186 { 196 {
187 rxvt_term *term = new rxvt_term; 197 rxvt_term *term = new rxvt_term;
188 198
189 term->log_hook = &log_cb; 199 term->log_hook = &log_cb;
190 term->getfd_hook = &getfd_cb; 200 term->getfd_hook = &getfd_cb;
191 201
192 bool success; 202 bool success = true;
193 203
194 try 204 try
195 { 205 {
196 success = term->init (argv, envv); 206 term->init (argv, envv);
197 } 207 }
198 catch (const class rxvt_failure_exception &e) 208 catch (const class rxvt_failure_exception &e)
199 { 209 {
200 success = false; 210 success = false;
201 } 211 }
202 212
203 term->log_hook = 0; 213 term->log_hook = 0;
204 214
205 chdir ("/"); 215 chdir ("/"); // init might change to different working directory
206 216
207 if (!success) 217 if (!success)
208 term->destroy (); 218 term->destroy ();
209 219
210 send ("END"); send (success ? 1 : 0); 220 send ("END"); send (success ? 1 : 0);
211 } 221 }
212 } 222 }
223 else if (!strcmp (tok, "QUIT"))
224 _exit (0);
213 else 225 else
214 return err ("protocol error: request '%s' unsupported.", (char *)tok); 226 return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
215 } 227 }
216 else 228 else
217 return err (); 229 return err ();
218} 230}
219 231
220int opt_fork, opt_opendisplay, opt_quiet; 232#ifdef ENABLE_FRILLS
233enum {
234 SD_LISTEN_FDS_START = 3,
235};
236
237// https://www.freedesktop.org/software/systemd/man/sd_listen_fds.html
238// https://github.com/systemd/systemd/blob/main/src/libsystemd/sd-daemon/sd-daemon.c
239static int get_listen_fds ()
240{
241 const char *listen_pid = getenv ("LISTEN_PID");
242 if (!listen_pid)
243 return 0;
244
245 char *end;
246 errno = 0;
247 long pid = strtol (listen_pid, &end, 10);
248 if (errno || end == listen_pid || *end)
249 return -1;
250
251 if (getpid () != pid)
252 return 0;
253
254 const char *listen_fds = getenv ("LISTEN_FDS");
255 if (!listen_fds)
256 return 0;
257
258 errno = 0;
259 long n = strtol (listen_fds, &end, 10);
260 if (errno || end == listen_fds || *end)
261 return -1;
262
263 if (n <= 0 || n > INT_MAX - SD_LISTEN_FDS_START)
264 return -1;
265
266 unsetenv ("LISTEN_PID");
267 unsetenv ("LISTEN_FDS");
268 unsetenv ("LISTEN_FDNAMES");
269
270 return n;
271}
272#endif
221 273
222int 274int
223main (int argc, const char *const *argv) 275main (int argc, char *argv[])
224{ 276{
225 rxvt_init (); 277 ptytty::init ();
278
279 static char opt_fork, opt_opendisplay, opt_quiet;
280#if ENABLE_PERL
281 static char *opt_eval;
282#endif
283#if ENABLE_MLOCK
284 static char opt_lock;
285#endif
226 286
227 for (int i = 1; i < argc; i++) 287 for (int i = 1; i < argc; i++)
228 { 288 {
229 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) 289 if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
230 opt_fork = 1; 290 opt_fork = 1;
231 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) 291 else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay"))
232 opt_opendisplay = 1; 292 opt_opendisplay = 1;
233 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) 293 else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet"))
234 opt_quiet = 1; 294 opt_quiet = 1;
295#if ENABLE_MLOCK
296 else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock"))
297 opt_lock = 1;
298#endif
299#if ENABLE_PERL
300 else if (!strcmp (argv [i], "-e") || !strcmp (argv [i], "--eval"))
301 opt_eval = argv [++i];
302#endif
235 else 303 else
236 { 304 {
237 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); 305 rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
238 return EXIT_FAILURE; 306 return EXIT_FAILURE;
239 } 307 }
240 } 308 }
241 309
310 rxvt_init ();
311
312#if ENABLE_PERL
313 if (opt_eval)
314 {
315 rxvt_perl.init ();
316 rxvt_perl.eval (opt_eval);
317 }
318#endif
319
320 // optionally open display and never release it.
321 if (opt_opendisplay)
322 if (const char *dpy = getenv ("DISPLAY"))
323 displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?
324
325 int fd;
326#ifdef ENABLE_FRILLS
327 int n = get_listen_fds ();
328 if (n > 1)
329 {
330 fputs ("received multiple file descriptors, aborting.\n", stderr);
331 exit (EXIT_FAILURE);
332 }
333 else if (n == 1)
334 {
335 fd = SD_LISTEN_FDS_START;
336 if (!opt_quiet)
337 {
338 printf ("rxvt-unicode daemon listening on fd.\n");
339 fflush (stdout);
340 }
341 }
342 else
343#endif
344 {
345 char *sockname = rxvt_connection::unix_sockname ();
346 fd = unix_listener::open (sockname);
347 if (!opt_quiet)
348 {
349 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
350 fflush (stdout);
351 }
352 free (sockname);
353 }
354
355 unix_listener l (fd);
356
242 chdir ("/"); 357 chdir ("/");
243 358
244 if (opt_opendisplay) 359 pid_t pid = 0;
245 displays.get (getenv ("DISPLAY")); // open display and never release it
246
247 char *sockname = rxvt_connection::unix_sockname ();
248 unix_listener l (sockname);
249
250 if (!opt_quiet)
251 {
252 printf ("rxvt-unicode daemon listening on %s.\n", sockname);
253 fflush (stdout);
254 }
255
256 free (sockname);
257
258 if (opt_fork) 360 if (opt_fork)
259 { 361 {
260 pid_t pid = fork (); 362 pid = fork ();
363 }
261 364
365#if ENABLE_MLOCK
366 // Optionally perform an mlockall so this process does not get swapped out.
367 if (opt_lock && !pid)
368 if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0)
369 perror ("unable to lock into ram");
370#endif
371
372 if (opt_fork)
373 {
262 if (pid < 0) 374 if (pid < 0)
263 { 375 {
264 rxvt_log ("unable to fork daemon, aborting.\n"); 376 rxvt_log ("unable to fork daemon, aborting.\n");
265 return EXIT_FAILURE; 377 return EXIT_FAILURE;
266 } 378 }
267 else if (pid > 0) 379 else if (pid > 0)
268 _exit (EXIT_SUCCESS); 380 _exit (EXIT_SUCCESS);
269 }
270 381
271 io_manager::loop (); 382 ev_loop_fork (EV_DEFAULT_UC);
383 }
384
385 ev_run ();
272 386
273 return EXIT_SUCCESS; 387 return EXIT_SUCCESS;
274} 388}
275 389

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