rxvt-unicode/src/rxvtd.C

/*--------------------------------*-C-*---------------------------------*
 * File:        rxvtd.C
 *----------------------------------------------------------------------*
 *
 * All portions of code are copyright by their respective author/s.
 * Copyright (c) 2003-2004 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 "rxvt.h"
#include "rxvtdaemon.h"
#include "iom.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>

extern char **environ;

struct server : rxvt_connection {
  log_callback log_cb;

  void read_cb (io_watcher &w, short revents); io_watcher read_ev;
  void log_msg (const char *msg);

  server (int fd)
  : read_ev (this, &server::read_cb),
    log_cb (this, &server::log_msg)
  {
    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 (PF_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);
    }
}

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 (tok.get ());
              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 (tok.get ());
              else
                return err ("protocol error: unexpected NEW token");
            }

          envv->push_back (0);

          {
            char **old_environ = environ;
            environ = envv->begin ();

            rxvt_term *term = new rxvt_term;
            
            term->log_hook = &log_cb;
            term->argv = argv;
            term->envv = envv;

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

            term->log_hook = 0;

            environ = old_environ;

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

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

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

  char *sockname = rxvt_connection::unix_sockname ();
  unix_listener l (sockname);
  printf ("rxvt-unicode daemon listening on %s.\n", sockname);
  fflush (stdout);
  free (sockname);

  io_manager::loop ();

  return EXIT_SUCCESS;
}

Revision:	1.19
Committed:	Wed Feb 9 08:32:57 2005 UTC (19 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-5_0
Changes since 1.18:	+1 -0 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			* Copyright (c) 2003-2004 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	pcg	1.9	#include "../config.h"
24			#include "rxvt.h"
25	pcg	1.1	#include "rxvtdaemon.h"
26			#include "iom.h"
27
28			#include <cstdio>
29			#include <cstdlib>
30	pcg	1.3	#include <cstdarg>
31			#include <cstring>
32	pcg	1.1
33			#include <unistd.h>
34	pcg	1.12	#include <fcntl.h>
35	pcg	1.5	#include <sys/types.h>
36			#include <sys/stat.h>
37	pcg	1.1	#include <sys/socket.h>
38			#include <sys/un.h>
39
40	pcg	1.3	#include <cerrno>
41
42			extern char **environ;
43
44	pcg	1.1	struct server : rxvt_connection {
45	pcg	1.10	log_callback log_cb;
46
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	pcg	1.1
50			server (int fd)
51	pcg	1.10	: read_ev (this, &server::read_cb),
52			log_cb (this, &server::log_msg)
53	pcg	1.1	{
54			this->fd = fd;
55			read_ev.start (fd, EVENT_READ);
56			}
57
58	pcg	1.3	void err (const char *format = 0, ...);
59	pcg	1.1	};
60
61	pcg	1.5	struct unix_listener {
62	pcg	1.1	int fd;
63
64			void accept_cb (io_watcher &w, short revents); io_watcher accept_ev;
65
66	pcg	1.5	unix_listener (const char *sockname);
67	pcg	1.1	};
68
69	pcg	1.5	unix_listener::unix_listener (const char *sockname)
70			: accept_ev (this, &unix_listener::accept_cb)
71	pcg	1.1	{
72	pcg	1.14	if ((fd = socket (PF_UNIX, SOCK_STREAM, 0)) < 0)
73	pcg	1.1	{
74			perror ("unable to create listening socket");
75			exit (EXIT_FAILURE);
76			}
77
78	pcg	1.12	fcntl (fd, F_SETFD, FD_CLOEXEC);
79
80	pcg	1.1	sockaddr_un sa;
81
82			sa.sun_family = AF_UNIX;
83	pcg	1.5	strcpy (sa.sun_path, sockname);
84	pcg	1.1
85			unlink (rxvt_connection::unix_sockname ());
86
87	pcg	1.5	mode_t omask = umask (0077);
88
89	pcg	1.1	if (bind (fd, (sockaddr *)&sa, sizeof (sa)))
90			{
91			perror ("unable to bind listening socket");
92			exit (EXIT_FAILURE);
93			}
94
95	pcg	1.5	umask (omask);
96
97	pcg	1.1	if (listen (fd, 5))
98			{
99			perror ("unable to listen on socket");
100			exit (EXIT_FAILURE);
101			}
102
103			accept_ev.start (fd, EVENT_READ);
104			}
105
106	pcg	1.5	void unix_listener::accept_cb (io_watcher &w, short revents)
107	pcg	1.1	{
108			int fd2 = accept (fd, 0, 0);
109
110			if (fd2 >= 0)
111	pcg	1.12	{
112			fcntl (fd2, F_SETFD, FD_CLOEXEC);
113			new server (fd2);
114			}
115	pcg	1.1	}
116
117	pcg	1.10	void server::log_msg (const char *msg)
118			{
119			send ("MSG"), send (msg);
120			}
121
122	pcg	1.3	void server::err (const char *format, ...)
123	pcg	1.1	{
124	pcg	1.3	if (format)
125			{
126			char err[1024];
127
128			va_list ap;
129			va_start (ap, format);
130			vsnprintf (err, 1024, format, ap);
131			va_end (ap);
132
133	pcg	1.10	send ("MSG"), send (err);
134	pcg	1.3	}
135
136	pcg	1.10	send ("END", 0);
137	pcg	1.1	close (fd);
138			delete this;
139			}
140
141			void server::read_cb (io_watcher &w, short revents)
142			{
143	pcg	1.2	auto_str tok;
144	pcg	1.1
145	pcg	1.2	if (recv (tok))
146	pcg	1.1	{
147	pcg	1.2	if (!strcmp (tok, "NEW"))
148	pcg	1.1	{
149	pcg	1.9	stringvec *argv = new stringvec;
150			stringvec *envv = new stringvec;
151	pcg	1.2
152			for (;;)
153			{
154			if (!recv (tok))
155			return err ();
156
157			if (!strcmp (tok, "END"))
158			break;
159	pcg	1.3	else if (!strcmp (tok, "ENV") && recv (tok))
160	pcg	1.9	envv->push_back (tok.get ());
161	pcg	1.3	else if (!strcmp (tok, "CWD") && recv (tok))
162			{
163			if (chdir (tok))
164			err ("unable to change to working directory to '%s': %s",
165			(char *)tok, strerror (errno));
166			}
167	pcg	1.2	else if (!strcmp (tok, "ARG") && recv (tok))
168	pcg	1.9	argv->push_back (tok.get ());
169	pcg	1.2	else
170	pcg	1.3	return err ("protocol error: unexpected NEW token");
171	pcg	1.2	}
172
173	pcg	1.9	envv->push_back (0);
174	pcg	1.3
175			{
176			char **old_environ = environ;
177	pcg	1.9	environ = envv->begin ();
178	pcg	1.3
179	pcg	1.10	rxvt_term *term = new rxvt_term;
180
181			term->log_hook = &log_cb;
182	pcg	1.9	term->argv = argv;
183			term->envv = envv;
184	pcg	1.2
185	pcg	1.10	bool success;
186
187			try
188			{
189			success = term->init (argv->size (), argv->begin ());
190			}
191			catch (const class rxvt_failure_exception &e)
192			{
193			success = false;
194			}
195
196	root	1.15	term->log_hook = 0;
197
198	pcg	1.3	environ = old_environ;
199	pcg	1.10
200			if (!success)
201			term->destroy ();
202
203			send ("END"); send (success ? 1 : 0);
204	pcg	1.3	}
205	pcg	1.1	}
206			else
207	pcg	1.3	return err ("protocol error: request '%s' unsupported.", (char *)tok);
208	pcg	1.1	}
209			else
210	pcg	1.2	return err ();
211	pcg	1.1	}
212
213			int
214	pcg	1.8	main (int argc, const char const argv)
215	pcg	1.1	{
216	root	1.16	rxvt_init ();
217	pcg	1.5
218			char *sockname = rxvt_connection::unix_sockname ();
219			unix_listener l (sockname);
220	root	1.17	printf ("rxvt-unicode daemon listening on %s.\n", sockname);
221	root	1.19	fflush (stdout);
222	pcg	1.5	free (sockname);
223
224	root	1.18	io_manager::loop ();
225	pcg	1.1
226			return EXIT_SUCCESS;
227			}
228	pcg	1.7