rxvt-unicode/src/rxvtd.C

/*----------------------------------------------------------------------*
 * File:        rxvtd.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2006 Marc Lehmann <pcg@goof.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------*/

#include "../config.h"
#include <cstdio>
#include <cstdlib>
#include <cstdarg>
#include <cstring>

#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/un.h>

#include <cerrno>

#include "rxvt.h"
#include "rxvtdaemon.h"
#include "libptytty.h"

struct server : rxvt_connection {
  log_callback log_cb;
  getfd_callback getfd_cb;

  void read_cb (ev::io &w, int revents); ev::io read_ev;
  void log_msg (const char *msg);
  int getfd (int remote_fd);

  server (int fd)
  : read_ev (this, &server::read_cb),
    log_cb (this, &server::log_msg),
    getfd_cb (this, &server::getfd)
  {
    fcntl (fd, F_SETFD, FD_CLOEXEC);
    fcntl (fd, F_SETFL, 0);
    read_ev.start (fd, ev::READ);
  }

  void err (const char *format = 0, ...);
};

struct unix_listener {
  int fd;

  void accept_cb (ev::io &w, int revents); ev::io accept_ev;

  unix_listener (const char *sockname);
};

unix_listener::unix_listener (const char *sockname)
: accept_ev (this, &unix_listener::accept_cb)
{
  sockaddr_un sa;

  if (strlen (sockname) >= sizeof(sa.sun_path))
    {
      fputs ("socket name too long, aborting.\n", stderr);
      exit (EXIT_FAILURE);
    }

  if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
    {
      perror ("unable to create listening socket");
      exit (EXIT_FAILURE);
    }

  fcntl (fd, F_SETFD, FD_CLOEXEC);
  fcntl (fd, F_SETFL, O_NONBLOCK);

  sa.sun_family = AF_UNIX;
  strcpy (sa.sun_path, sockname);

  unlink (rxvt_connection::unix_sockname ());

  mode_t omask = umask (0077);

  if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
    {
      perror ("unable to bind listening socket");
      exit (EXIT_FAILURE);
    }

  umask (omask);

  if (listen (fd, 5))
    {
      perror ("unable to listen on socket");
      exit (EXIT_FAILURE);
    }

  accept_ev.start (fd, ev::READ);
}

void unix_listener::accept_cb (ev::io &w, int revents)
{
  int fd2 = accept (fd, 0, 0);

  if (fd2 >= 0)
    new server (fd2);
}

int server::getfd (int remote_fd)
{
  send ("GETFD");
  send (remote_fd);
  return ptytty::recv_fd (fd);
}

void server::log_msg (const char *msg)
{
  send ("MSG"), send (msg);
}

void server::err (const char *format, ...)
{
  if (format)
    {
      char err[1024];

      va_list ap;
      va_start (ap, format);
      vsnprintf (err, 1024, format, ap);
      va_end (ap);

      log_msg (err);
    }

  send ("END"), send (0);
  close (fd);
  delete this;
}

void server::read_cb (ev::io &w, int revents)
{
  auto_str tok;

  if (recv (tok))
    {
      if (!strcmp (tok, "NEW"))
        {
          stringvec *argv = new stringvec;
          stringvec *envv = new stringvec;

          for (;;)
            {
              if (!recv (tok))
                return err ();

              if (!strcmp (tok, "END"))
                break;
              else if (!strcmp (tok, "ENV") && recv (tok))
                envv->push_back (strdup (tok));
              else if (!strcmp (tok, "CWD") && recv (tok))
                {
                  if (chdir (tok))
                    {
                      delete envv;
                      delete argv;
                      return err ("unable to change to working directory to '%s', aborting: %s.\n",
                                  (char *)tok, strerror (errno));
                    }
                }
              else if (!strcmp (tok, "ARG") && recv (tok))
                argv->push_back (strdup (tok));
              else
                return err ("protocol error: unexpected NEW token.\n");
            }

          envv->push_back (0);

          {
            rxvt_term *term = new rxvt_term;

            term->log_hook = &log_cb;
            term->getfd_hook = &getfd_cb;

            bool success;

            try
              {
                success = term->init (argv, envv);
              }
            catch (const class rxvt_failure_exception &e)
              {
                success = false;
              }

            term->log_hook = 0;

            chdir ("/");

            if (!success)
              term->destroy ();

            send ("END"); send (success ? 1 : 0);
          }
        }
      else
        return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
    }
  else
    return err ();
}

int opt_fork, opt_opendisplay, opt_quiet;

int
main (int argc, const char *const *argv)
{
  rxvt_init ();

  for (int i = 1; i < argc; i++)
    {
      if (!strcmp (argv [i], "-f") || !strcmp (argv [i], "--fork"))
        opt_fork = 1;
      else if (!strcmp (argv [i], "-o") || !strcmp (argv [i], "--opendisplay"))
        opt_opendisplay = 1;
      else if (!strcmp (argv [i], "-q") || !strcmp (argv [i], "--quiet"))
        opt_quiet = 1;
      else
        {
          rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
          return EXIT_FAILURE;
        }
    }

  chdir ("/");

  if (opt_opendisplay)
    displays.get (getenv ("DISPLAY")); // open display and never release it

  char *sockname = rxvt_connection::unix_sockname ();
  unix_listener l (sockname);

  if (!opt_quiet)
    {
      printf ("rxvt-unicode daemon listening on %s.\n", sockname);
      fflush (stdout);
    }

  free (sockname);

  if (opt_fork)
    {
      pid_t pid = fork ();

      if (pid < 0)
        {
          rxvt_log ("unable to fork daemon, aborting.\n");
          return EXIT_FAILURE;
        }
      else if (pid > 0)
        _exit (EXIT_SUCCESS);
    }

  ev::ev_loop (0);

  return EXIT_SUCCESS;
}

Revision:	1.36
Committed:	Sat Nov 17 07:28:00 2007 UTC (16 years, 6 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.35:	+0 -1 lines
Log Message:	just in case...
#	User	Rev	Content
1	root	1.29	/----------------------------------------------------------------------
2	pcg	1.14	* File: rxvtd.C
3			----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6	root	1.28	* Copyright (c) 2003-2006 Marc Lehmann <pcg@goof.com>
7	pcg	1.14	*
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	pcg	1.9	#include "../config.h"
24	pcg	1.1	#include <cstdio>
25			#include <cstdlib>
26	pcg	1.3	#include <cstdarg>
27			#include <cstring>
28	pcg	1.1
29			#include <unistd.h>
30	pcg	1.12	#include <fcntl.h>
31	pcg	1.5	#include <sys/types.h>
32			#include <sys/stat.h>
33	pcg	1.1	#include <sys/socket.h>
34			#include <sys/un.h>
35
36	pcg	1.3	#include <cerrno>
37
38	root	1.27	#include "rxvt.h"
39			#include "rxvtdaemon.h"
40			#include "libptytty.h"
41	pcg	1.3
42	pcg	1.1	struct server : rxvt_connection {
43	pcg	1.10	log_callback log_cb;
44	root	1.22	getfd_callback getfd_cb;
45	pcg	1.10
46	root	1.34	void read_cb (ev::io &w, int revents); ev::io read_ev;
47	pcg	1.10	void log_msg (const char *msg);
48	root	1.22	int getfd (int remote_fd);
49	pcg	1.1
50			server (int fd)
51	pcg	1.10	: read_ev (this, &server::read_cb),
52	root	1.22	log_cb (this, &server::log_msg),
53			getfd_cb (this, &server::getfd)
54	pcg	1.1	{
55	root	1.35	fcntl (fd, F_SETFD, FD_CLOEXEC);
56			fcntl (fd, F_SETFL, 0);
57	root	1.34	read_ev.start (fd, ev::READ);
58	pcg	1.1	}
59
60	pcg	1.3	void err (const char *format = 0, ...);
61	pcg	1.1	};
62
63	pcg	1.5	struct unix_listener {
64	pcg	1.1	int fd;
65
66	root	1.34	void accept_cb (ev::io &w, int revents); ev::io accept_ev;
67	pcg	1.1
68	pcg	1.5	unix_listener (const char *sockname);
69	pcg	1.1	};
70
71	pcg	1.5	unix_listener::unix_listener (const char *sockname)
72			: accept_ev (this, &unix_listener::accept_cb)
73	pcg	1.1	{
74	root	1.30	sockaddr_un sa;
75	ayin	1.33
76	root	1.31	if (strlen (sockname) >= sizeof(sa.sun_path))
77			{
78			fputs ("socket name too long, aborting.\n", stderr);
79			exit (EXIT_FAILURE);
80			}
81	root	1.30
82	root	1.24	if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
83	pcg	1.1	{
84			perror ("unable to create listening socket");
85			exit (EXIT_FAILURE);
86			}
87
88	pcg	1.12	fcntl (fd, F_SETFD, FD_CLOEXEC);
89	root	1.35	fcntl (fd, F_SETFL, O_NONBLOCK);
90	pcg	1.12
91	pcg	1.1	sa.sun_family = AF_UNIX;
92	pcg	1.5	strcpy (sa.sun_path, sockname);
93	pcg	1.1
94			unlink (rxvt_connection::unix_sockname ());
95
96	pcg	1.5	mode_t omask = umask (0077);
97
98	pcg	1.1	if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
99			{
100			perror ("unable to bind listening socket");
101			exit (EXIT_FAILURE);
102			}
103
104	pcg	1.5	umask (omask);
105
106	pcg	1.1	if (listen (fd, 5))
107			{
108			perror ("unable to listen on socket");
109			exit (EXIT_FAILURE);
110			}
111
112	root	1.34	accept_ev.start (fd, ev::READ);
113	pcg	1.1	}
114
115	root	1.34	void unix_listener::accept_cb (ev::io &w, int revents)
116	pcg	1.1	{
117			int fd2 = accept (fd, 0, 0);
118
119			if (fd2 >= 0)
120	root	1.35	new server (fd2);
121	pcg	1.1	}
122
123	root	1.22	int server::getfd (int remote_fd)
124			{
125			send ("GETFD");
126			send (remote_fd);
127	root	1.27	return ptytty::recv_fd (fd);
128	root	1.22	}
129
130	pcg	1.10	void server::log_msg (const char *msg)
131			{
132			send ("MSG"), send (msg);
133			}
134
135	pcg	1.3	void server::err (const char *format, ...)
136	pcg	1.1	{
137	pcg	1.3	if (format)
138			{
139			char err[1024];
140
141			va_list ap;
142			va_start (ap, format);
143			vsnprintf (err, 1024, format, ap);
144			va_end (ap);
145
146	root	1.32	log_msg (err);
147	pcg	1.3	}
148
149	root	1.32	send ("END"), send (0);
150	pcg	1.1	close (fd);
151			delete this;
152			}
153
154	root	1.34	void server::read_cb (ev::io &w, int revents)
155	pcg	1.1	{
156	pcg	1.2	auto_str tok;
157	pcg	1.1
158	pcg	1.2	if (recv (tok))
159	pcg	1.1	{
160	pcg	1.2	if (!strcmp (tok, "NEW"))
161	pcg	1.1	{
162	pcg	1.9	stringvec *argv = new stringvec;
163			stringvec *envv = new stringvec;
164	ayin	1.33
165	pcg	1.2	for (;;)
166			{
167			if (!recv (tok))
168			return err ();
169
170			if (!strcmp (tok, "END"))
171			break;
172	pcg	1.3	else if (!strcmp (tok, "ENV") && recv (tok))
173	root	1.26	envv->push_back (strdup (tok));
174	pcg	1.3	else if (!strcmp (tok, "CWD") && recv (tok))
175			{
176			if (chdir (tok))
177	root	1.31	{
178			delete envv;
179			delete argv;
180			return err ("unable to change to working directory to '%s', aborting: %s.\n",
181			(char *)tok, strerror (errno));
182			}
183	pcg	1.3	}
184	pcg	1.2	else if (!strcmp (tok, "ARG") && recv (tok))
185	root	1.26	argv->push_back (strdup (tok));
186	pcg	1.2	else
187	root	1.31	return err ("protocol error: unexpected NEW token.\n");
188	pcg	1.2	}
189
190	pcg	1.9	envv->push_back (0);
191	pcg	1.3
192			{
193	pcg	1.10	rxvt_term *term = new rxvt_term;
194	ayin	1.33
195	pcg	1.10	term->log_hook = &log_cb;
196	root	1.22	term->getfd_hook = &getfd_cb;
197	pcg	1.2
198	pcg	1.10	bool success;
199	ayin	1.33
200	pcg	1.10	try
201			{
202	root	1.26	success = term->init (argv, envv);
203	pcg	1.10	}
204			catch (const class rxvt_failure_exception &e)
205			{
206			success = false;
207			}
208
209	root	1.15	term->log_hook = 0;
210
211	root	1.20	chdir ("/");
212	pcg	1.10
213			if (!success)
214			term->destroy ();
215
216			send ("END"); send (success ? 1 : 0);
217	pcg	1.3	}
218	pcg	1.1	}
219			else
220	root	1.31	return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
221	pcg	1.1	}
222			else
223	pcg	1.2	return err ();
224	pcg	1.1	}
225
226	root	1.21	int opt_fork, opt_opendisplay, opt_quiet;
227
228	pcg	1.1	int
229	pcg	1.8	main (int argc, const char const argv)
230	pcg	1.1	{
231	root	1.25	rxvt_init ();
232
233	root	1.21	for (int i = 1; i < argc; i++)
234			{
235			if (!strcmp (argv [i], "-f") \|\| !strcmp (argv [i], "--fork"))
236			opt_fork = 1;
237			else if (!strcmp (argv [i], "-o") \|\| !strcmp (argv [i], "--opendisplay"))
238			opt_opendisplay = 1;
239			else if (!strcmp (argv [i], "-q") \|\| !strcmp (argv [i], "--quiet"))
240			opt_quiet = 1;
241			else
242			{
243			rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
244			return EXIT_FAILURE;
245			}
246			}
247	ayin	1.33
248	root	1.20	chdir ("/");
249
250	root	1.21	if (opt_opendisplay)
251			displays.get (getenv ("DISPLAY")); // open display and never release it
252
253	pcg	1.5	char *sockname = rxvt_connection::unix_sockname ();
254			unix_listener l (sockname);
255	root	1.21
256			if (!opt_quiet)
257			{
258			printf ("rxvt-unicode daemon listening on %s.\n", sockname);
259			fflush (stdout);
260			}
261
262	pcg	1.5	free (sockname);
263
264	root	1.21	if (opt_fork)
265			{
266			pid_t pid = fork ();
267
268			if (pid < 0)
269			{
270			rxvt_log ("unable to fork daemon, aborting.\n");
271			return EXIT_FAILURE;
272			}
273			else if (pid > 0)
274			_exit (EXIT_SUCCESS);
275			}
276
277	root	1.34	ev::ev_loop (0);
278	pcg	1.1
279			return EXIT_SUCCESS;
280			}
281	pcg	1.7