| 1 |
/*----------------------------------------------------------------------* |
| 2 |
* File: rxvtd.C |
| 3 |
*----------------------------------------------------------------------* |
| 4 |
* |
| 5 |
* All portions of code are copyright by their respective author/s. |
| 6 |
* Copyright (c) 2003-2007 Marc Lehmann <pcg@goof.com> |
| 7 |
* |
| 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 |
| 10 |
* the Free Software Foundation; either version 2 of the License, or |
| 11 |
* (at your option) any later version. |
| 12 |
* |
| 13 |
* This program is distributed in the hope that it will be useful, |
| 14 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 |
* GNU General Public License for more details. |
| 17 |
* |
| 18 |
* You should have received a copy of the GNU General Public License |
| 19 |
* along with this program; if not, write to the Free Software |
| 20 |
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 21 |
*----------------------------------------------------------------------*/ |
| 22 |
|
| 23 |
#include "../config.h" |
| 24 |
#include <cstdio> |
| 25 |
#include <cstdlib> |
| 26 |
#include <cstdarg> |
| 27 |
#include <cstring> |
| 28 |
|
| 29 |
#include <unistd.h> |
| 30 |
#include <fcntl.h> |
| 31 |
#include <sys/types.h> |
| 32 |
#include <sys/stat.h> |
| 33 |
#include <sys/socket.h> |
| 34 |
#include <sys/un.h> |
| 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 |
|
| 44 |
#include <cerrno> |
| 45 |
|
| 46 |
#include "rxvt.h" |
| 47 |
#include "rxvtdaemon.h" |
| 48 |
#include "libptytty.h" |
| 49 |
|
| 50 |
struct server : rxvt_connection { |
| 51 |
log_callback log_cb; |
| 52 |
getfd_callback getfd_cb; |
| 53 |
|
| 54 |
void read_cb (ev::io &w, int revents); ev::io read_ev; |
| 55 |
void log_msg (const char *msg); |
| 56 |
int getfd (int remote_fd); |
| 57 |
|
| 58 |
server (int fd) |
| 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 |
|
| 64 |
this->fd = fd; |
| 65 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
| 66 |
fcntl (fd, F_SETFL, 0); |
| 67 |
read_ev.start (fd, ev::READ); |
| 68 |
} |
| 69 |
|
| 70 |
void err (const char *format = 0, ...); |
| 71 |
}; |
| 72 |
|
| 73 |
struct unix_listener { |
| 74 |
int fd; |
| 75 |
|
| 76 |
void accept_cb (ev::io &w, int revents); ev::io accept_ev; |
| 77 |
|
| 78 |
unix_listener (const char *sockname); |
| 79 |
}; |
| 80 |
|
| 81 |
unix_listener::unix_listener (const char *sockname) |
| 82 |
{ |
| 83 |
accept_ev.set<unix_listener, &unix_listener::accept_cb> (this); |
| 84 |
|
| 85 |
sockaddr_un sa; |
| 86 |
|
| 87 |
if (strlen (sockname) >= sizeof(sa.sun_path)) |
| 88 |
{ |
| 89 |
fputs ("socket name too long, aborting.\n", stderr); |
| 90 |
exit (EXIT_FAILURE); |
| 91 |
} |
| 92 |
|
| 93 |
if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0) |
| 94 |
{ |
| 95 |
perror ("unable to create listening socket"); |
| 96 |
exit (EXIT_FAILURE); |
| 97 |
} |
| 98 |
|
| 99 |
fcntl (fd, F_SETFD, FD_CLOEXEC); |
| 100 |
fcntl (fd, F_SETFL, O_NONBLOCK); |
| 101 |
|
| 102 |
sa.sun_family = AF_UNIX; |
| 103 |
strcpy (sa.sun_path, sockname); |
| 104 |
|
| 105 |
unlink (sockname); |
| 106 |
|
| 107 |
mode_t omask = umask (0077); |
| 108 |
|
| 109 |
if (bind (fd, (sockaddr *)&sa, sizeof (sa))) |
| 110 |
{ |
| 111 |
perror ("unable to bind listening socket"); |
| 112 |
exit (EXIT_FAILURE); |
| 113 |
} |
| 114 |
|
| 115 |
umask (omask); |
| 116 |
|
| 117 |
if (listen (fd, 5)) |
| 118 |
{ |
| 119 |
perror ("unable to listen on socket"); |
| 120 |
exit (EXIT_FAILURE); |
| 121 |
} |
| 122 |
|
| 123 |
accept_ev.start (fd, ev::READ); |
| 124 |
} |
| 125 |
|
| 126 |
void unix_listener::accept_cb (ev::io &w, int revents) |
| 127 |
{ |
| 128 |
int fd2 = accept (fd, 0, 0); |
| 129 |
|
| 130 |
if (fd2 >= 0) |
| 131 |
new server (fd2); |
| 132 |
} |
| 133 |
|
| 134 |
int server::getfd (int remote_fd) |
| 135 |
{ |
| 136 |
send ("GETFD"); |
| 137 |
send (remote_fd); |
| 138 |
return ptytty::recv_fd (fd); |
| 139 |
} |
| 140 |
|
| 141 |
void server::log_msg (const char *msg) |
| 142 |
{ |
| 143 |
send ("MSG"), send (msg); |
| 144 |
} |
| 145 |
|
| 146 |
void server::err (const char *format, ...) |
| 147 |
{ |
| 148 |
if (format) |
| 149 |
{ |
| 150 |
char err[1024]; |
| 151 |
|
| 152 |
va_list ap; |
| 153 |
va_start (ap, format); |
| 154 |
vsnprintf (err, 1024, format, ap); |
| 155 |
va_end (ap); |
| 156 |
|
| 157 |
log_msg (err); |
| 158 |
} |
| 159 |
|
| 160 |
send ("END"), send (0); |
| 161 |
close (fd); |
| 162 |
delete this; |
| 163 |
} |
| 164 |
|
| 165 |
void server::read_cb (ev::io &w, int revents) |
| 166 |
{ |
| 167 |
auto_str tok; |
| 168 |
|
| 169 |
if (recv (tok)) |
| 170 |
{ |
| 171 |
if (!strcmp (tok, "NEW")) |
| 172 |
{ |
| 173 |
stringvec *argv = new stringvec; |
| 174 |
stringvec *envv = new stringvec; |
| 175 |
|
| 176 |
for (;;) |
| 177 |
{ |
| 178 |
if (!recv (tok)) |
| 179 |
return err (); |
| 180 |
|
| 181 |
if (!strcmp (tok, "END")) |
| 182 |
break; |
| 183 |
else if (!strcmp (tok, "ENV") && recv (tok)) |
| 184 |
envv->push_back (strdup (tok)); |
| 185 |
else if (!strcmp (tok, "ARG") && recv (tok)) |
| 186 |
argv->push_back (strdup (tok)); |
| 187 |
else |
| 188 |
return err ("protocol error: unexpected NEW token.\n"); |
| 189 |
} |
| 190 |
|
| 191 |
envv->push_back (0); |
| 192 |
|
| 193 |
{ |
| 194 |
rxvt_term *term = new rxvt_term; |
| 195 |
|
| 196 |
term->log_hook = &log_cb; |
| 197 |
term->getfd_hook = &getfd_cb; |
| 198 |
|
| 199 |
bool success = true; |
| 200 |
|
| 201 |
try |
| 202 |
{ |
| 203 |
term->init (argv, envv); |
| 204 |
} |
| 205 |
catch (const class rxvt_failure_exception &e) |
| 206 |
{ |
| 207 |
success = false; |
| 208 |
} |
| 209 |
|
| 210 |
term->log_hook = 0; |
| 211 |
|
| 212 |
chdir ("/"); // init might change to different working directory |
| 213 |
|
| 214 |
if (!success) |
| 215 |
term->destroy (); |
| 216 |
|
| 217 |
send ("END"); send (success ? 1 : 0); |
| 218 |
} |
| 219 |
} |
| 220 |
else |
| 221 |
return err ("protocol error: request '%s' unsupported.\n", (char *)tok); |
| 222 |
} |
| 223 |
else |
| 224 |
return err (); |
| 225 |
} |
| 226 |
|
| 227 |
int |
| 228 |
main (int argc, const char *const *argv) |
| 229 |
{ |
| 230 |
ptytty::init (); |
| 231 |
|
| 232 |
static char opt_fork, opt_opendisplay, opt_quiet; |
| 233 |
#if ENABLE_MLOCK |
| 234 |
static char opt_lock; |
| 235 |
#endif |
| 236 |
|
| 237 |
for (int i = 1; i < argc; i++) |
| 238 |
{ |
| 239 |
if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork")) |
| 240 |
opt_fork = 1; |
| 241 |
else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay")) |
| 242 |
opt_opendisplay = 1; |
| 243 |
else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet")) |
| 244 |
opt_quiet = 1; |
| 245 |
#if ENABLE_MLOCK |
| 246 |
else if (!strcmp (argv [i], "-m") || !strcmp (argv [i], "--mlock")) |
| 247 |
opt_lock = 1; |
| 248 |
#endif |
| 249 |
else |
| 250 |
{ |
| 251 |
rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]); |
| 252 |
return EXIT_FAILURE; |
| 253 |
} |
| 254 |
} |
| 255 |
|
| 256 |
rxvt_init (); |
| 257 |
|
| 258 |
// optionally open display and never release it. |
| 259 |
if (opt_opendisplay) |
| 260 |
if (const char *dpy = getenv ("DISPLAY")) |
| 261 |
displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe? |
| 262 |
|
| 263 |
char *sockname = rxvt_connection::unix_sockname (); |
| 264 |
unix_listener l (sockname); |
| 265 |
|
| 266 |
chdir ("/"); |
| 267 |
|
| 268 |
if (!opt_quiet) |
| 269 |
{ |
| 270 |
printf ("rxvt-unicode daemon listening on %s.\n", sockname); |
| 271 |
fflush (stdout); |
| 272 |
} |
| 273 |
|
| 274 |
free (sockname); |
| 275 |
|
| 276 |
pid_t pid = 0; |
| 277 |
if (opt_fork) |
| 278 |
{ |
| 279 |
pid = fork (); |
| 280 |
} |
| 281 |
|
| 282 |
#if ENABLE_MLOCK |
| 283 |
// Optionally perform an mlockall so this process does not get swapped out. |
| 284 |
if (opt_lock && !pid) |
| 285 |
if (mlockall (MCL_CURRENT | MCL_FUTURE) < 0) |
| 286 |
perror ("unable to lock into ram"); |
| 287 |
#endif |
| 288 |
|
| 289 |
if (opt_fork) |
| 290 |
{ |
| 291 |
if (pid < 0) |
| 292 |
{ |
| 293 |
rxvt_log ("unable to fork daemon, aborting.\n"); |
| 294 |
return EXIT_FAILURE; |
| 295 |
} |
| 296 |
else if (pid > 0) |
| 297 |
_exit (EXIT_SUCCESS); |
| 298 |
|
| 299 |
ev_loop_fork (EV_DEFAULT_UC); |
| 300 |
} |
| 301 |
|
| 302 |
ev_run (); |
| 303 |
|
| 304 |
return EXIT_SUCCESS; |
| 305 |
} |
| 306 |
|
