rxvt-unicode/src/rxvtd.C

/*----------------------------------------------------------------------*
 * File:        rxvtd.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2007 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.set <server, &server::read_cb> (this);
    log_cb.set  <server, &server::log_msg> (this);
    getfd_cb.set<server, &server::getfd>   (this);

    this->fd = fd;
    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.set<unix_listener, &unix_listener::accept_cb> (this);

  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 = true;

            try
              {
                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;
        }
    }

  // optionally open display and never release it.
  if (opt_opendisplay)
    if (const char *dpy = getenv ("DISPLAY"))
      displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?

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

  chdir ("/");

  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_default_fork ();
    }

  ev_loop (0);

  return EXIT_SUCCESS;
}

Revision:	1.45
Committed:	Tue Feb 19 18:58:05 2008 UTC (16 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.44:	+3 -1 lines
Log Message:	* empty log message *
#	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	1.43	* Copyright (c) 2003-2007 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			{
52	root	1.41	read_ev.set <server, &server::read_cb> (this);
53			log_cb.set <server, &server::log_msg> (this);
54			getfd_cb.set<server, &server::getfd> (this);
55
56	root	1.37	this->fd = fd;
57	root	1.35	fcntl (fd, F_SETFD, FD_CLOEXEC);
58			fcntl (fd, F_SETFL, 0);
59	root	1.34	read_ev.start (fd, ev::READ);
60	pcg	1.1	}
61
62	pcg	1.3	void err (const char *format = 0, ...);
63	pcg	1.1	};
64
65	pcg	1.5	struct unix_listener {
66	pcg	1.1	int fd;
67
68	root	1.34	void accept_cb (ev::io &w, int revents); ev::io accept_ev;
69	pcg	1.1
70	pcg	1.5	unix_listener (const char *sockname);
71	pcg	1.1	};
72
73	pcg	1.5	unix_listener::unix_listener (const char *sockname)
74	pcg	1.1	{
75	root	1.41	accept_ev.set<unix_listener, &unix_listener::accept_cb> (this);
76
77	root	1.30	sockaddr_un sa;
78	ayin	1.33
79	root	1.31	if (strlen (sockname) >= sizeof(sa.sun_path))
80			{
81			fputs ("socket name too long, aborting.\n", stderr);
82			exit (EXIT_FAILURE);
83			}
84	root	1.30
85	root	1.24	if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
86	pcg	1.1	{
87			perror ("unable to create listening socket");
88			exit (EXIT_FAILURE);
89			}
90
91	pcg	1.12	fcntl (fd, F_SETFD, FD_CLOEXEC);
92	root	1.35	fcntl (fd, F_SETFL, O_NONBLOCK);
93	pcg	1.12
94	pcg	1.1	sa.sun_family = AF_UNIX;
95	pcg	1.5	strcpy (sa.sun_path, sockname);
96	pcg	1.1
97			unlink (rxvt_connection::unix_sockname ());
98
99	pcg	1.5	mode_t omask = umask (0077);
100
101	pcg	1.1	if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
102			{
103			perror ("unable to bind listening socket");
104			exit (EXIT_FAILURE);
105			}
106
107	pcg	1.5	umask (omask);
108
109	pcg	1.1	if (listen (fd, 5))
110			{
111			perror ("unable to listen on socket");
112			exit (EXIT_FAILURE);
113			}
114
115	root	1.34	accept_ev.start (fd, ev::READ);
116	pcg	1.1	}
117
118	root	1.34	void unix_listener::accept_cb (ev::io &w, int revents)
119	pcg	1.1	{
120			int fd2 = accept (fd, 0, 0);
121
122			if (fd2 >= 0)
123	root	1.35	new server (fd2);
124	pcg	1.1	}
125
126	root	1.22	int server::getfd (int remote_fd)
127			{
128			send ("GETFD");
129			send (remote_fd);
130	root	1.27	return ptytty::recv_fd (fd);
131	root	1.22	}
132
133	pcg	1.10	void server::log_msg (const char *msg)
134			{
135			send ("MSG"), send (msg);
136			}
137
138	pcg	1.3	void server::err (const char *format, ...)
139	pcg	1.1	{
140	pcg	1.3	if (format)
141			{
142			char err[1024];
143
144			va_list ap;
145			va_start (ap, format);
146			vsnprintf (err, 1024, format, ap);
147			va_end (ap);
148
149	root	1.32	log_msg (err);
150	pcg	1.3	}
151
152	root	1.32	send ("END"), send (0);
153	pcg	1.1	close (fd);
154			delete this;
155			}
156
157	root	1.34	void server::read_cb (ev::io &w, int revents)
158	pcg	1.1	{
159	pcg	1.2	auto_str tok;
160	pcg	1.1
161	pcg	1.2	if (recv (tok))
162	pcg	1.1	{
163	pcg	1.2	if (!strcmp (tok, "NEW"))
164	pcg	1.1	{
165	pcg	1.9	stringvec *argv = new stringvec;
166			stringvec *envv = new stringvec;
167	ayin	1.33
168	pcg	1.2	for (;;)
169			{
170			if (!recv (tok))
171			return err ();
172
173			if (!strcmp (tok, "END"))
174			break;
175	pcg	1.3	else if (!strcmp (tok, "ENV") && recv (tok))
176	root	1.26	envv->push_back (strdup (tok));
177	pcg	1.3	else if (!strcmp (tok, "CWD") && recv (tok))
178			{
179			if (chdir (tok))
180	root	1.31	{
181			delete envv;
182			delete argv;
183			return err ("unable to change to working directory to '%s', aborting: %s.\n",
184			(char *)tok, strerror (errno));
185			}
186	pcg	1.3	}
187	pcg	1.2	else if (!strcmp (tok, "ARG") && recv (tok))
188	root	1.26	argv->push_back (strdup (tok));
189	pcg	1.2	else
190	root	1.31	return err ("protocol error: unexpected NEW token.\n");
191	pcg	1.2	}
192
193	pcg	1.9	envv->push_back (0);
194	pcg	1.3
195			{
196	pcg	1.10	rxvt_term *term = new rxvt_term;
197	ayin	1.33
198	pcg	1.10	term->log_hook = &log_cb;
199	root	1.22	term->getfd_hook = &getfd_cb;
200	pcg	1.2
201	root	1.42	bool success = true;
202	ayin	1.33
203	pcg	1.10	try
204			{
205	root	1.42	term->init (argv, envv);
206	pcg	1.10	}
207			catch (const class rxvt_failure_exception &e)
208			{
209			success = false;
210			}
211
212	root	1.15	term->log_hook = 0;
213
214	root	1.20	chdir ("/");
215	pcg	1.10
216			if (!success)
217			term->destroy ();
218
219			send ("END"); send (success ? 1 : 0);
220	pcg	1.3	}
221	pcg	1.1	}
222			else
223	root	1.31	return err ("protocol error: request '%s' unsupported.\n", (char *)tok);
224	pcg	1.1	}
225			else
226	pcg	1.2	return err ();
227	pcg	1.1	}
228
229	root	1.21	int opt_fork, opt_opendisplay, opt_quiet;
230
231	pcg	1.1	int
232	pcg	1.8	main (int argc, const char const argv)
233	pcg	1.1	{
234	root	1.25	rxvt_init ();
235
236	root	1.21	for (int i = 1; i < argc; i++)
237			{
238			if (!strcmp (argv [i], "-f") \|\| !strcmp (argv [i], "--fork"))
239			opt_fork = 1;
240			else if (!strcmp (argv [i], "-o") \|\| !strcmp (argv [i], "--opendisplay"))
241			opt_opendisplay = 1;
242			else if (!strcmp (argv [i], "-q") \|\| !strcmp (argv [i], "--quiet"))
243			opt_quiet = 1;
244			else
245			{
246			rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
247			return EXIT_FAILURE;
248			}
249			}
250	ayin	1.33
251	root	1.45	// optionally open display and never release it.
252	root	1.21	if (opt_opendisplay)
253	root	1.45	if (const char *dpy = getenv ("DISPLAY"))
254			displays.get (dpy ? dpy : ":0"); // move string logic into rxvt_display maybe?
255	root	1.21
256	pcg	1.5	char *sockname = rxvt_connection::unix_sockname ();
257			unix_listener l (sockname);
258	root	1.21
259	root	1.44	chdir ("/");
260
261	root	1.21	if (!opt_quiet)
262			{
263			printf ("rxvt-unicode daemon listening on %s.\n", sockname);
264			fflush (stdout);
265			}
266
267	pcg	1.5	free (sockname);
268
269	root	1.21	if (opt_fork)
270			{
271			pid_t pid = fork ();
272
273			if (pid < 0)
274			{
275			rxvt_log ("unable to fork daemon, aborting.\n");
276			return EXIT_FAILURE;
277			}
278			else if (pid > 0)
279			_exit (EXIT_SUCCESS);
280	root	1.38
281	root	1.39	ev_default_fork ();
282	root	1.21	}
283
284	root	1.39	ev_loop (0);
285	pcg	1.1
286			return EXIT_SUCCESS;
287			}
288	pcg	1.7