rxvt-unicode/src/rxvtd.C

/*--------------------------------*-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"
#include "iom.h"

struct server : rxvt_connection {
  log_callback log_cb;
  getfd_callback getfd_cb;

  void read_cb (io_watcher &w, short revents); io_watcher 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)
  {
    this->fd = fd;
    read_ev.start (fd, EVENT_READ);
  }

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

struct unix_listener {
  int fd;

  void accept_cb (io_watcher &w, short revents); io_watcher accept_ev;

  unix_listener (const char *sockname);
};

unix_listener::unix_listener (const char *sockname)
: accept_ev (this, &unix_listener::accept_cb)
{
  if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
    {
      perror ("unable to create listening socket");
      exit (EXIT_FAILURE);
    }

  fcntl (fd, F_SETFD, FD_CLOEXEC);

  sockaddr_un sa;

  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, EVENT_READ);
}

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

  if (fd2 >= 0)
    {
      fcntl (fd2, F_SETFD, FD_CLOEXEC);
      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);

      send ("MSG"), send (err);
    }

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

void server::read_cb (io_watcher &w, short 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))
                    err ("unable to change to working directory to '%s': %s",
                         (char *)tok, strerror (errno));
                }
              else if (!strcmp (tok, "ARG") && recv (tok))
                argv->push_back (strdup (tok));
              else
                return err ("protocol error: unexpected NEW token");
            }

          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.", (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);
    }

  io_manager::loop ();

  return EXIT_SUCCESS;
}

Revision:	1.28
Committed:	Mon Feb 20 22:40:35 2006 UTC (18 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
Changes since 1.27:	+1 -1 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	pcg	1.14	/---------------------------------C----------------------------------
2			* 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			#include "iom.h"
42	pcg	1.3
43	pcg	1.1	struct server : rxvt_connection {
44	pcg	1.10	log_callback log_cb;
45	root	1.22	getfd_callback getfd_cb;
46	pcg	1.10
47	pcg	1.1	void read_cb (io_watcher &w, short revents); io_watcher read_ev;
48	pcg	1.10	void log_msg (const char *msg);
49	root	1.22	int getfd (int remote_fd);
50	pcg	1.1
51			server (int fd)
52	pcg	1.10	: read_ev (this, &server::read_cb),
53	root	1.22	log_cb (this, &server::log_msg),
54			getfd_cb (this, &server::getfd)
55	pcg	1.1	{
56			this->fd = fd;
57			read_ev.start (fd, EVENT_READ);
58			}
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			void accept_cb (io_watcher &w, short revents); io_watcher accept_ev;
67
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	1.24	if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
75	pcg	1.1	{
76			perror ("unable to create listening socket");
77			exit (EXIT_FAILURE);
78			}
79
80	pcg	1.12	fcntl (fd, F_SETFD, FD_CLOEXEC);
81
82	pcg	1.1	sockaddr_un sa;
83
84			sa.sun_family = AF_UNIX;
85	pcg	1.5	strcpy (sa.sun_path, sockname);
86	pcg	1.1
87			unlink (rxvt_connection::unix_sockname ());
88
89	pcg	1.5	mode_t omask = umask (0077);
90
91	pcg	1.1	if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
92			{
93			perror ("unable to bind listening socket");
94			exit (EXIT_FAILURE);
95			}
96
97	pcg	1.5	umask (omask);
98
99	pcg	1.1	if (listen (fd, 5))
100			{
101			perror ("unable to listen on socket");
102			exit (EXIT_FAILURE);
103			}
104
105			accept_ev.start (fd, EVENT_READ);
106			}
107
108	pcg	1.5	void unix_listener::accept_cb (io_watcher &w, short revents)
109	pcg	1.1	{
110			int fd2 = accept (fd, 0, 0);
111
112			if (fd2 >= 0)
113	pcg	1.12	{
114			fcntl (fd2, F_SETFD, FD_CLOEXEC);
115			new server (fd2);
116			}
117	pcg	1.1	}
118
119	root	1.22	int server::getfd (int remote_fd)
120			{
121			send ("GETFD");
122			send (remote_fd);
123	root	1.27	return ptytty::recv_fd (fd);
124	root	1.22	}
125
126	pcg	1.10	void server::log_msg (const char *msg)
127			{
128			send ("MSG"), send (msg);
129			}
130
131	pcg	1.3	void server::err (const char *format, ...)
132	pcg	1.1	{
133	pcg	1.3	if (format)
134			{
135			char err[1024];
136
137			va_list ap;
138			va_start (ap, format);
139			vsnprintf (err, 1024, format, ap);
140			va_end (ap);
141
142	pcg	1.10	send ("MSG"), send (err);
143	pcg	1.3	}
144
145	pcg	1.10	send ("END", 0);
146	pcg	1.1	close (fd);
147			delete this;
148			}
149
150			void server::read_cb (io_watcher &w, short revents)
151			{
152	pcg	1.2	auto_str tok;
153	pcg	1.1
154	pcg	1.2	if (recv (tok))
155	pcg	1.1	{
156	pcg	1.2	if (!strcmp (tok, "NEW"))
157	pcg	1.1	{
158	pcg	1.9	stringvec *argv = new stringvec;
159			stringvec *envv = new stringvec;
160	pcg	1.2
161			for (;;)
162			{
163			if (!recv (tok))
164			return err ();
165
166			if (!strcmp (tok, "END"))
167			break;
168	pcg	1.3	else if (!strcmp (tok, "ENV") && recv (tok))
169	root	1.26	envv->push_back (strdup (tok));
170	pcg	1.3	else if (!strcmp (tok, "CWD") && recv (tok))
171			{
172			if (chdir (tok))
173			err ("unable to change to working directory to '%s': %s",
174			(char *)tok, strerror (errno));
175			}
176	pcg	1.2	else if (!strcmp (tok, "ARG") && recv (tok))
177	root	1.26	argv->push_back (strdup (tok));
178	pcg	1.2	else
179	pcg	1.3	return err ("protocol error: unexpected NEW token");
180	pcg	1.2	}
181
182	pcg	1.9	envv->push_back (0);
183	pcg	1.3
184			{
185	pcg	1.10	rxvt_term *term = new rxvt_term;
186
187			term->log_hook = &log_cb;
188	root	1.22	term->getfd_hook = &getfd_cb;
189	pcg	1.2
190	pcg	1.10	bool success;
191
192			try
193			{
194	root	1.26	success = term->init (argv, envv);
195	pcg	1.10	}
196			catch (const class rxvt_failure_exception &e)
197			{
198			success = false;
199			}
200
201	root	1.15	term->log_hook = 0;
202
203	root	1.20	chdir ("/");
204	pcg	1.10
205			if (!success)
206			term->destroy ();
207
208			send ("END"); send (success ? 1 : 0);
209	pcg	1.3	}
210	pcg	1.1	}
211			else
212	pcg	1.3	return err ("protocol error: request '%s' unsupported.", (char *)tok);
213	pcg	1.1	}
214			else
215	pcg	1.2	return err ();
216	pcg	1.1	}
217
218	root	1.21	int opt_fork, opt_opendisplay, opt_quiet;
219
220	pcg	1.1	int
221	pcg	1.8	main (int argc, const char const argv)
222	pcg	1.1	{
223	root	1.25	rxvt_init ();
224
225	root	1.21	for (int i = 1; i < argc; i++)
226			{
227			if (!strcmp (argv [i], "-f") \|\| !strcmp (argv [i], "--fork"))
228			opt_fork = 1;
229			else if (!strcmp (argv [i], "-o") \|\| !strcmp (argv [i], "--opendisplay"))
230			opt_opendisplay = 1;
231			else if (!strcmp (argv [i], "-q") \|\| !strcmp (argv [i], "--quiet"))
232			opt_quiet = 1;
233			else
234			{
235			rxvt_log ("%s: unknown option '%s', aborting.\n", argv [0], argv [i]);
236			return EXIT_FAILURE;
237			}
238			}
239
240	root	1.20	chdir ("/");
241
242	root	1.21	if (opt_opendisplay)
243			displays.get (getenv ("DISPLAY")); // open display and never release it
244
245	pcg	1.5	char *sockname = rxvt_connection::unix_sockname ();
246			unix_listener l (sockname);
247	root	1.21
248			if (!opt_quiet)
249			{
250			printf ("rxvt-unicode daemon listening on %s.\n", sockname);
251			fflush (stdout);
252			}
253
254	pcg	1.5	free (sockname);
255
256	root	1.21	if (opt_fork)
257			{
258			pid_t pid = fork ();
259
260			if (pid < 0)
261			{
262			rxvt_log ("unable to fork daemon, aborting.\n");
263			return EXIT_FAILURE;
264			}
265			else if (pid > 0)
266			_exit (EXIT_SUCCESS);
267			}
268
269	root	1.18	io_manager::loop ();
270	pcg	1.1
271			return EXIT_SUCCESS;
272			}
273	pcg	1.7