/* Client process that communicates with GNU Emacs acting as server.
Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004,
- 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GNU Emacs.
-GNU Emacs is free software; you can redistribute it and/or modify
+GNU Emacs 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 3, or (at your option)
-any later version.
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
-along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
-Boston, MA 02110-1301, USA. */
+along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
-#define NO_SHORTNAMES
-
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <unistd.h>
#endif
-#ifdef VMS
-# include "vms-pwd.h"
-#else /* not VMS */
#ifdef WINDOWSNT
# include <io.h>
#else /* not WINDOWSNT */
# include <pwd.h>
#endif /* not WINDOWSNT */
-#endif /* not VMS */
#include <sys/stat.h>
#include <signal.h>
char *getenv (), *getwd ();
char *(getcwd) ();
+#ifdef WINDOWSNT
+char *w32_getenv ();
+#define egetenv(VAR) w32_getenv(VAR)
+#else
+#define egetenv(VAR) getenv(VAR)
+#endif
+
#ifndef VERSION
#define VERSION "unspecified"
#endif
{ "socket-name", required_argument, NULL, 's' },
#endif
{ "server-file", required_argument, NULL, 'f' },
+#ifndef WINDOWSNT
{ "display", required_argument, NULL, 'd' },
+#endif
{ 0, 0, 0, 0 }
};
/* Return the current working directory. Returns NULL on errors.
- Any other returned value must be freed with free. This is used
+ Any other returned value must be freed with free. This is used
only when get_current_dir_name is not defined on the system. */
char*
get_current_dir_name ()
/* If PWD is accurate, use it instead of calling getwd. PWD is
sometimes a nicer name, and using it may avoid a fatal error if a
parent directory is searchable but not readable. */
- if ((pwd = getenv ("PWD")) != 0
+ if ((pwd = egetenv ("PWD")) != 0
&& (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
&& stat (pwd, &pwdstat) == 0
&& stat (".", &dotstat) == 0
}
#endif
-/* Message functions. */
-
#ifdef WINDOWSNT
+
+#define REG_ROOT "SOFTWARE\\GNU\\Emacs"
+
+/* Retrieve an environment variable from the Emacs subkeys of the registry.
+ Return NULL if the variable was not found, or it was empty.
+ This code is based on w32_get_resource (w32.c). */
+char *
+w32_get_resource (predefined, key, type)
+ HKEY predefined;
+ char *key;
+ LPDWORD type;
+{
+ HKEY hrootkey = NULL;
+ char *result = NULL;
+ DWORD cbData;
+
+ if (RegOpenKeyEx (predefined, REG_ROOT, 0, KEY_READ, &hrootkey) == ERROR_SUCCESS)
+ {
+ if (RegQueryValueEx (hrootkey, key, NULL, NULL, NULL, &cbData) == ERROR_SUCCESS)
+ {
+ result = (char *) xmalloc (cbData);
+
+ if ((RegQueryValueEx (hrootkey, key, NULL, type, result, &cbData) != ERROR_SUCCESS) ||
+ (*result == 0))
+ {
+ free (result);
+ result = NULL;
+ }
+ }
+
+ RegCloseKey (hrootkey);
+ }
+
+ return result;
+}
+
+/*
+ getenv wrapper for Windows
+
+ This is needed to duplicate Emacs's behavior, which is to look for enviroment
+ variables in the registry if they don't appear in the environment.
+*/
+char *
+w32_getenv (envvar)
+ char *envvar;
+{
+ char *value;
+ DWORD dwType;
+
+ if (value = getenv (envvar))
+ /* Found in the environment. */
+ return value;
+
+ if (! (value = w32_get_resource (HKEY_CURRENT_USER, envvar, &dwType)) &&
+ ! (value = w32_get_resource (HKEY_LOCAL_MACHINE, envvar, &dwType)))
+ /* Not found in the registry. */
+ return NULL;
+
+ if (dwType == REG_SZ)
+ /* Registry; no need to expand. */
+ return value;
+
+ if (dwType == REG_EXPAND_SZ)
+ {
+ DWORD size;
+
+ if (size = ExpandEnvironmentStrings (value, NULL, 0))
+ {
+ char *buffer = (char *) xmalloc (size);
+ if (ExpandEnvironmentStrings (value, buffer, size))
+ {
+ /* Found and expanded. */
+ free (value);
+ return buffer;
+ }
+
+ /* Error expanding. */
+ free (buffer);
+ }
+ }
+
+ /* Not the right type, or not correctly expanded. */
+ free (value);
+ return NULL;
+}
+
int
w32_window_app ()
{
#endif /* WINDOWSNT */
+/* Display a normal or error message.
+ On Windows, use a message box if compiled as a Windows app. */
void
message (int is_error, char *message, ...)
{
int argc;
char **argv;
{
- alternate_editor = getenv ("ALTERNATE_EDITOR");
- display = getenv ("DISPLAY");
- if (display && strlen (display) == 0)
- display = NULL;
+ alternate_editor = egetenv ("ALTERNATE_EDITOR");
while (1)
{
server_file = optarg;
break;
+ /* We used to disallow this argument in w32, but it seems better
+ to allow it, for the occasional case where the user is
+ connecting with a w32 client to a server compiled with X11
+ support. */
+#if 1 /* !defined WINDOWS */
case 'd':
display = optarg;
break;
+#endif
case 'n':
nowait = 1;
}
}
+ /* We used to set `display' to $DISPLAY by default, but this changed the
+ default behavior and is sometimes inconvenient. So instead of forcing
+ users to say "--display ''" when they want to use Emacs's existing tty
+ or display connection, we force them to use "--display $DISPLAY" if
+ they want Emacs to connect to their current display.
+ -c still implicitly passes --display $DISPLAY unless -t was specified
+ so as to try and mimick the behavior of `emacs' which either uses
+ the current tty or the current $DISPLAY. */
+ if (!current_frame && !tty && !display)
+ display = egetenv ("DISPLAY");
+
+ if (display && strlen (display) == 0)
+ display = NULL;
+
if (!tty && display)
window_system = 1;
-#if !defined (WINDOWSNT) && !defined (HAVE_CARBON)
- else
+#if !defined (WINDOWSNT)
+ else if (!current_frame)
tty = 1;
#endif
/* Socket used to communicate with the Emacs server process. */
HSOCKET emacs_socket = 0;
+/* On Windows, the socket library was historically separate from the standard
+ C library, so errors are handled differently. */
+void
+sock_err_message (function_name)
+ char *function_name;
+{
+#ifdef WINDOWSNT
+ char* msg = NULL;
+
+ FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
+ | FORMAT_MESSAGE_ALLOCATE_BUFFER
+ | FORMAT_MESSAGE_ARGUMENT_ARRAY,
+ NULL, WSAGetLastError (), 0, (LPTSTR)&msg, 0, NULL);
+
+ message (TRUE, "%s: %s: %s\n", progname, function_name, msg);
+
+ LocalFree (msg);
+#else
+ message (TRUE, "%s: %s: %s\n", progname, function_name, strerror (errno));
+#endif
+}
+
+
/* Let's send the data to Emacs when either
- the data ends in "\n", or
- the buffer is full (but this shouldn't happen)
/* Both \xxx and \\xxx\yyy are absolute. */
if (filename[0] == '\\') return TRUE;
-
- /*
- FIXME: There's a corner case not dealt with, "x:y", where:
-
- 1) x is a valid drive designation (usually a letter in the A-Z range)
- and y is a path, relative to the current directory on drive x. This
- is absolute, *after* fixing the y part to include the current
- directory in x.
-
- 2) x is a relative file name, and y is an NTFS stream name. This is a
- correct relative path, but it is very unusual.
-
- The trouble is that first case items are also valid examples of the
- second case, i.e., "c:test" can be understood as drive:path or as
- file:stream.
-
- The "right" fix would involve checking whether
- - the current drive/partition is NTFS,
- - x is a valid (and accesible) drive designator,
- - x:y already exists as a file:stream in the current directory,
- - y already exists on the current directory of drive x,
- - the auspices are favorable,
- and then taking an "informed decision" based on the above.
-
- Whatever the result, Emacs currently does a very bad job of dealing
- with NTFS file:streams: it cannot visit them, and the only way to
- create one is by setting `buffer-file-name' to point to it (either
- manually or with emacsclient). So perhaps resorting to 1) and ignoring
- 2) for now is the right thing to do.
-
- Anyway, something to decide After the Release.
- */
#endif
return FALSE;
if (WSAStartup (MAKEWORD (2, 0), &wsaData))
{
- message (TRUE, "%s: error initializing WinSock2", progname);
+ message (TRUE, "%s: error initializing WinSock2\n", progname);
exit (EXIT_FAILURE);
}
config = fopen (server_file, "rb");
else
{
- char *home = getenv ("HOME");
+ char *home = egetenv ("HOME");
if (home)
{
config = fopen (path, "rb");
}
#ifdef WINDOWSNT
- if (!config && (home = getenv ("APPDATA")))
+ if (!config && (home = egetenv ("APPDATA")))
{
char *path = alloca (32 + strlen (home) + strlen (server_file));
sprintf (path, "%s/.emacs.d/server/%s", home, server_file);
}
else
{
- message (TRUE, "%s: invalid configuration info", progname);
+ message (TRUE, "%s: invalid configuration info\n", progname);
exit (EXIT_FAILURE);
}
if (! fread (authentication, AUTH_KEY_LENGTH, 1, config))
{
- message (TRUE, "%s: cannot read authentication info", progname);
+ message (TRUE, "%s: cannot read authentication info\n", progname);
exit (EXIT_FAILURE);
}
*/
if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
- message (TRUE, "%s: socket: %s\n", progname, strerror (errno));
+ sock_err_message ("socket");
return INVALID_SOCKET;
}
*/
if (connect (s, (struct sockaddr *) &server, sizeof server) < 0)
{
- message (TRUE, "%s: connect: %s\n", progname, strerror (errno));
+ sock_err_message ("connect");
return INVALID_SOCKET;
}
send_to_emacs (s, "-auth ");
send_to_emacs (s, auth_string);
- send_to_emacs (s, "\n");
+ send_to_emacs (s, " ");
return s;
}
if (emacs_socket)
send_to_emacs (emacs_socket, "-suspend \n");
- /* Unblock this signal and call the default handler by temprarily
+ /* Unblock this signal and call the default handler by temporarily
changing the handler and resignalling. */
sigprocmask (SIG_BLOCK, NULL, &set);
sigdelset (&set, signalnum);
strcpy (server.sun_path, socket_name);
else
{
- message (TRUE, "%s: socket-name %s too long",
+ message (TRUE, "%s: socket-name %s too long\n",
progname, socket_name);
fail ();
}
associated with the name. This is reminiscent of the logic
that init_editfns uses to set the global Vuser_full_name. */
- char *user_name = (char *) getenv ("LOGNAME");
+ char *user_name = (char *) egetenv ("LOGNAME");
if (!user_name)
- user_name = (char *) getenv ("USER");
+ user_name = (char *) egetenv ("USER");
if (user_name)
{
strcpy (server.sun_path, socket_name);
else
{
- message (TRUE, "%s: socket-name %s too long",
+ message (TRUE, "%s: socket-name %s too long\n",
progname, socket_name);
exit (EXIT_FAILURE);
}
s = set_local_socket ();
if ((s != INVALID_SOCKET) || alternate_editor)
return s;
- message (TRUE, "%s: error accessing socket \"%s\"",
+ message (TRUE, "%s: error accessing socket \"%s\"\n",
progname, socket_name);
exit (EXIT_FAILURE);
}
/* Explicit --server-file arg or EMACS_SERVER_FILE variable. */
if (!server_file)
- server_file = getenv ("EMACS_SERVER_FILE");
+ server_file = egetenv ("EMACS_SERVER_FILE");
if (server_file)
{
if ((s != INVALID_SOCKET) || alternate_editor)
return s;
- message (TRUE, "%s: error accessing server file \"%s\"",
+ message (TRUE, "%s: error accessing server file \"%s\"\n",
progname, server_file);
exit (EXIT_FAILURE);
}
if (tty)
{
- char *type = getenv ("TERM");
+ char *type = egetenv ("TERM");
char *tty_name = NULL;
#ifndef WINDOWSNT
tty_name = ttyname (fileno (stdin));
else
relative = 1;
}
- else if (! file_name_absolute_p (argv[i]))
- relative = 1;
+ else if (! file_name_absolute_p (argv[i]))
+#ifndef WINDOWSNT
+ relative = 1;
+#else
+ /* Call GetFullPathName so filenames of the form X:Y, where X is
+ a valid drive designator, are interpreted as drive:path, not
+ file:stream, and treated as absolute.
+ The user can still pass a file:stream if desired (for example,
+ .\X:Y), but it is not very useful, as Emacs currently does a
+ very bad job of dealing wih NTFS streams. */
+ {
+ char *filename = (char *) xmalloc (MAX_PATH);
+ DWORD size;
+
+ size = GetFullPathName (argv[i], MAX_PATH, filename, NULL);
+ if (size > 0 && size < MAX_PATH)
+ argv[i] = filename;
+ else
+ {
+ relative = 1;
+ free (filename);
+ }
+ }
+#endif
send_to_emacs (emacs_socket, "-file ");
if (relative)
HCoop / bpt / emacs.git / blobdiff