rxvt-unicode/src/rxvtc.C

/*----------------------------------------------------------------------*
 * File:        rxvtc.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 <cstring>
#include <csignal>

#include <unistd.h>
#include <sys/socket.h>
#include <sys/un.h>

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

#include "rxvt.h"

#define STATUS_SUCCESS           0
#define STATUS_FAILURE           1
#define STATUS_CONNECTION_FAILED 2

struct client : rxvt_connection
{
  client ();
};

client::client ()
{
  sockaddr_un sa;
  char *sockname = rxvt_connection::unix_sockname ();

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

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

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

  if (connect (fd, (sockaddr *)&sa, sizeof (sa)))
    {
      perror ("unable to connect to the rxvt-unicode daemon");
      exit (STATUS_CONNECTION_FAILED);
    }
}

extern char **environ;

int
main (int argc, const char *const *argv)
{
  // instead of getcwd we could opendir (".") and pass the fd for fchdir *g*
  char cwd[PATH_MAX];

  if (!getcwd (cwd, sizeof (cwd)))
    {
      perror ("unable to determine current working directory");
      exit (STATUS_FAILURE);
    }

  client c;

  {
    sigset_t ss;

    sigemptyset (&ss);
    sigaddset (&ss, SIGHUP);
    sigaddset (&ss, SIGPIPE);
    sigprocmask (SIG_BLOCK, &ss, 0);
  }

  c.send ("NEW");
  c.send ("CWD"), c.send (cwd);

  for (char **var = environ; *var; var++)
    c.send ("ENV"), c.send (*var);

  const char *base = strrchr (argv[0], '/');
  base = base ? base + 1 : argv[0];
  c.send ("ARG"), c.send (strcmp (base, RXVTNAME "c") ? base : RXVTNAME);

  for (int i = 1; i < argc; i++)
    c.send ("ARG"), c.send (argv[i]);

  c.send ("END");

  auto_str tok;
  int cint;

  for (;;)
    if (!c.recv (tok))
      {
        fprintf (stderr, "protocol error: unexpected eof from server.\n");
        break;
      }
    else if (!strcmp (tok, "MSG") && c.recv (tok))
      fprintf (stderr, "%s", (const char *)tok);
    else if (!strcmp (tok, "GETFD") && c.recv (cint))
      {
        if (!ptytty::send_fd (c.fd, cint))
          {
            fprintf (stderr, "unable to send fd %d: ", cint); perror (0);
            exit (STATUS_FAILURE);
          }
      }
    else if (!strcmp (tok, "END"))
      {
        int success;

        if (c.recv (success))
          exit (success ? STATUS_SUCCESS : STATUS_FAILURE);
      }
    else
      {
        fprintf (stderr, "protocol error: received unsupported token '%s'.\n", (const char *)tok);
        break;
      }

  return STATUS_FAILURE;
}

Revision:	1.30
Committed:	Sun Nov 18 00:21:34 2007 UTC (18 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-8_5a, rel-8_8, rel-8_9, rel-8_6, rel-8_7
Changes since 1.29:	+10 -10 lines
Log Message:	streamline the protocol a bit
#	User	Rev	Content
1	root	1.25	/----------------------------------------------------------------------
2	pcg	1.11	* File: rxvtc.C
3			----------------------------------------------------------------------
4			*
5			* All portions of code are copyright by their respective author/s.
6	root	1.24	* Copyright (c) 2003-2006 Marc Lehmann <pcg@goof.com>
7	pcg	1.11	*
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	1.8	#include "../config.h"
24	pcg	1.1	#include <cstdio>
25			#include <cstdlib>
26	root	1.13	#include <cstring>
27	root	1.14	#include <csignal>
28	pcg	1.1
29			#include <unistd.h>
30			#include <sys/socket.h>
31			#include <sys/un.h>
32
33	root	1.21	#include "rxvtdaemon.h"
34			#include "libptytty.h"
35
36			#include "rxvt.h"
37
38	root	1.23	#define STATUS_SUCCESS 0
39			#define STATUS_FAILURE 1
40			#define STATUS_CONNECTION_FAILED 2
41
42	root	1.29	struct client : rxvt_connection
43			{
44	pcg	1.1	client ();
45			};
46
47			client::client ()
48			{
49	root	1.26	sockaddr_un sa;
50			char *sockname = rxvt_connection::unix_sockname ();
51	ayin	1.28
52	root	1.26	if (strlen(sockname) >= sizeof(sa.sun_path))
53			{
54			fputs ("socket name too long, aborting.\n", stderr);
55			exit (STATUS_FAILURE);
56			}
57	ayin	1.28
58	root	1.20	if ((fd = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
59	pcg	1.1	{
60	pcg	1.5	perror ("unable to create communications socket");
61	root	1.23	exit (STATUS_FAILURE);
62	pcg	1.1	}
63
64			sa.sun_family = AF_UNIX;
65	pcg	1.4	strcpy (sa.sun_path, sockname);
66			free (sockname);
67	pcg	1.1
68			if (connect (fd, (sockaddr *)&sa, sizeof (sa)))
69			{
70	root	1.13	perror ("unable to connect to the rxvt-unicode daemon");
71	root	1.23	exit (STATUS_CONNECTION_FAILED);
72	pcg	1.1	}
73			}
74
75	pcg	1.3	extern char **environ;
76
77	pcg	1.1	int
78	pcg	1.7	main (int argc, const char const argv)
79	pcg	1.1	{
80	root	1.30	// instead of getcwd we could opendir (".") and pass the fd for fchdir g
81			char cwd[PATH_MAX];
82
83			if (!getcwd (cwd, sizeof (cwd)))
84			{
85			perror ("unable to determine current working directory");
86			exit (STATUS_FAILURE);
87			}
88
89	pcg	1.1	client c;
90	root	1.30
91	pcg	1.3	{
92			sigset_t ss;
93
94	pcg	1.6	sigemptyset (&ss);
95	pcg	1.3	sigaddset (&ss, SIGHUP);
96	root	1.27	sigaddset (&ss, SIGPIPE);
97	pcg	1.3	sigprocmask (SIG_BLOCK, &ss, 0);
98			}
99
100	pcg	1.1	c.send ("NEW");
101	root	1.15	c.send ("CWD"), c.send (cwd);
102	pcg	1.3
103	root	1.16	for (char *var = environ; var; var++)
104			c.send ("ENV"), c.send (*var);
105	pcg	1.1
106	root	1.13	const char *base = strrchr (argv[0], '/');
107			base = base ? base + 1 : argv[0];
108			c.send ("ARG"), c.send (strcmp (base, RXVTNAME "c") ? base : RXVTNAME);
109
110			for (int i = 1; i < argc; i++)
111	pcg	1.2	c.send ("ARG"), c.send (argv[i]);
112
113	pcg	1.1	c.send ("END");
114	pcg	1.8
115			auto_str tok;
116	root	1.17	int cint;
117	pcg	1.8
118			for (;;)
119			if (!c.recv (tok))
120			{
121			fprintf (stderr, "protocol error: unexpected eof from server.\n");
122			break;
123			}
124			else if (!strcmp (tok, "MSG") && c.recv (tok))
125			fprintf (stderr, "%s", (const char *)tok);
126	root	1.17	else if (!strcmp (tok, "GETFD") && c.recv (cint))
127			{
128	root	1.22	if (!ptytty::send_fd (c.fd, cint))
129	root	1.17	{
130			fprintf (stderr, "unable to send fd %d: ", cint); perror (0);
131	root	1.23	exit (STATUS_FAILURE);
132	root	1.17	}
133			}
134	pcg	1.8	else if (!strcmp (tok, "END"))
135			{
136			int success;
137	root	1.19
138	pcg	1.8	if (c.recv (success))
139	root	1.23	exit (success ? STATUS_SUCCESS : STATUS_FAILURE);
140	pcg	1.8	}
141			else
142			{
143	root	1.17	fprintf (stderr, "protocol error: received unsupported token '%s'.\n", (const char *)tok);
144	pcg	1.8	break;
145			}
146
147	root	1.23	return STATUS_FAILURE;
148	pcg	1.1	}
149