* Re: Messages in non-console mode in emacsclient.c
2006-11-21 16:38 Messages in non-console mode in emacsclient.c Juanma Barranquero
@ 2006-11-21 17:20 ` Lennart Borgman
2006-11-21 18:06 ` Juanma Barranquero
2006-11-22 13:16 ` Richard Stallman
1 sibling, 1 reply; 4+ messages in thread
From: Lennart Borgman @ 2006-11-21 17:20 UTC (permalink / raw)
Cc: Emacs Devel
[-- Attachment #1: Type: text/plain, Size: 46 bytes --]
Juanma Barranquero wrote:
Forgot to attach.
[-- Attachment #2: emacsclient.c --]
[-- Type: text/plain, Size: 36309 bytes --]
/* Client process that communicates with GNU Emacs acting as server.
Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004,
2005, 2006 Free Software Foundation, Inc.
This file is part of GNU Emacs.
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 2, 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
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 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. */
/* FIX-ME: This file currently does not handle non-ascii file names
when starting emacs. Maybe it does not either for files? */
#define NO_SHORTNAMES
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef WINDOWSNT
/* config.h defines these, which disables sockets altogether! */
# undef _WINSOCKAPI_
# undef _WINSOCK_H
# include <malloc.h>
# include <stdlib.h>
# include <windows.h>
# define NO_SOCKETS_IN_FILE_SYSTEM
# define HSOCKET SOCKET
# define CLOSE_SOCKET closesocket
# define INITIALIZE() (initialize_sockets ())
#else /* !WINDOWSNT */
# include <sys/types.h>
# ifdef HAVE_INET_SOCKETS
# include <netinet/in.h>
# endif
# define INVALID_SOCKET -1
# define HSOCKET int
# define CLOSE_SOCKET close
# define INITIALIZE()
#endif /* !WINDOWSNT */
#undef signal
#include <stdarg.h>
#include <ctype.h>
#include <stdio.h>
#include "getopt.h"
#ifdef HAVE_UNISTD_H
#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 */
char *getenv (), *getwd ();
char *(getcwd) ();
#ifndef VERSION
#define VERSION "unspecified"
#endif
\f
#define SEND_STRING(data) (send_to_emacs (s, (data)))
#define SEND_QUOTED(data) (quote_file_name (s, (data)))
#ifndef EXIT_SUCCESS
#define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
#ifndef NO_RETURN
#define NO_RETURN
#endif
\f
/* Name used to invoke this program. */
char *progname;
/* Nonzero means don't wait for a response from Emacs. --no-wait. */
int nowait = 0;
/* Nonzero means args are expressions to be evaluated. --eval. */
int eval = 0;
/* The display on which Emacs should work. --display. */
char *display = NULL;
/* If non-NULL, the name of an editor to fallback to if the server
is not running. --alternate-editor. */
const char *alternate_editor = NULL;
const char *start_timeout = NULL;
int start_timeout_int = -1;
/* If non-NULL, the filename of the UNIX socket. */
char *socket_name = NULL;
/* If non-NULL, the filename of the authentication file. */
char *server_file = NULL;
void print_help_and_exit () NO_RETURN;
struct option longopts[] =
{
{ "no-wait", no_argument, NULL, 'n' },
{ "eval", no_argument, NULL, 'e' },
{ "help", no_argument, NULL, 'H' },
{ "version", no_argument, NULL, 'V' },
{ "alternate-editor", required_argument, NULL, 'a' },
{ "start-timeout", required_argument, NULL, 't' },
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
{ "socket-name", required_argument, NULL, 's' },
#endif
{ "server-file", required_argument, NULL, 'f' },
{ "display", required_argument, NULL, 'd' },
{ 0, 0, 0, 0 }
};
/* Message functions. */
#ifdef WINDOWSNT
void
show_w32sys_error2(DWORD dwError, LPTSTR lpszFunction)
{
LPVOID lpMsgBuf;
LPVOID lpDisplayBuf;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM,
NULL,
dwError,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf,
0, NULL );
lpDisplayBuf = LocalAlloc(LMEM_ZEROINIT,
strlen(lpMsgBuf)+strlen(lpszFunction)+40);
wsprintf(lpDisplayBuf,
"%s failed with error %d: %s",
lpszFunction, dwError, lpMsgBuf);
MessageBox(NULL, lpDisplayBuf, "Error", MB_OK);
LocalFree(lpMsgBuf);
LocalFree(lpDisplayBuf);
ExitProcess(dwError);
}
void
show_w32sys_error1(LPTSTR lpszFunction)
{
DWORD dw = GetLastError();
show_w32sys_error2(dw, lpszFunction);
}
/* I first tried to check for STDOUT. The check did not work,
I get a valid handle also in nonconsole apps.
Instead I test for console title, which seems to work. */
int
w32_window_app()
{
static int window_app = -1;
char szTitle[MAX_PATH];
if (window_app < 0)
window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0);
return window_app;
}
#endif
void
message (int is_error, char *message, ...)
{
char buf[2048];
char *msg = buf;
va_list args;
va_start (args, message);
if (is_error)
{
sprintf (buf, "%s: ", progname);
msg = strchr (buf, '\0');
}
vsprintf (msg, message, args);
va_end (args);
#ifdef WINDOWSNT
if (w32_window_app ())
{
if (is_error)
MessageBox (NULL, msg, "Emacsclient ERROR", MB_ICONERROR);
else
MessageBox (NULL, msg, "Emacsclient", MB_ICONINFORMATION);
}
else
#endif
fprintf (is_error ? stderr : stdout, msg);
}
int get_emacs_dir( char * pBuf, int len)
{
int ret = 0;
#ifdef WINDOWSNT
#define SET_ENV_BUF_SIZE (4 * MAX_PATH) /* to cover EMACSLOADPATH */
HKEY KeyHandle;
HKEY RegistryHandle;
LONG ErrorCode;
CHAR temp_string[ 2048 ];
DWORD size_of_buffer = 2048;
DWORD temp_data_type = (DWORD) REG_SZ;
BOOL found_it = FALSE;
/* Treat emacs_dir specially: Just return false if it appears that
we are running from the bin subdir of a standard
installation. */
{
char *p;
char *modname;
char *emacsExe;
modname = alloca(2*MAX_PATH);
emacsExe = alloca(2*MAX_PATH);
if (GetModuleFileName (NULL, modname, MAX_PATH))
{
if (!((p = strrchr (modname, '\\')) == NULL))
{
*p = 0;
if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0)
{
char buf[SET_ENV_BUF_SIZE];
*p = 0;
for (p = modname; *p; p++)
if (*p == '\\') *p = '/';
strcpy( emacsExe, modname);
strcat( emacsExe, "/emacs.exe" );
if (access (emacsExe, X_OK) == 0)
{
//_snprintf (buf, sizeof(buf)-1, "emacs_dir=%s", modname);
//memcpy( pBuf, modname, sizeof(modname));
//ret = TRUE;
//return ret;
return 0;
}
}
}
}
else
{
show_w32sys_error1("GetModuleFileName");
}
}
if ( ( ErrorCode = RegConnectRegistry( 0, HKEY_CURRENT_USER, &RegistryHandle ) ) != ERROR_SUCCESS )
{
show_w32sys_error2(ErrorCode, "RegConnectRegistry HKEY_CURRENT_USER");
}
else
{
if ( ( ErrorCode = RegOpenKeyEx( RegistryHandle, "SOFTWARE\\GNU\\Emacs", 0, KEY_READ, &KeyHandle ) ) == ERROR_SUCCESS )
{
memset( temp_string, 0, sizeof( temp_string ) );
if ( ( ErrorCode = RegQueryValueEx( KeyHandle, "emacs_dir", NULL, &temp_data_type, temp_string, &size_of_buffer ) ) == ERROR_SUCCESS )
{
found_it = TRUE;
}
RegCloseKey( KeyHandle );
}
RegCloseKey( RegistryHandle );
}
if (! found_it)
{
if ( ( ErrorCode = RegConnectRegistry( 0, HKEY_LOCAL_MACHINE, &RegistryHandle ) ) != ERROR_SUCCESS )
{
show_w32sys_error2(ErrorCode, "RegConnectRegistry HKEY_LOCAL_MACHINE");
}
else
{
if ( ( ErrorCode = RegOpenKeyEx( RegistryHandle, "SOFTWARE\\GNU\\Emacs", 0, KEY_READ, &KeyHandle ) ) == ERROR_SUCCESS )
{
memset( temp_string, 0, sizeof( temp_string ) );
if ( ( ErrorCode = RegQueryValueEx( KeyHandle, "emacs_dir", NULL, &temp_data_type, temp_string, &size_of_buffer ) ) == ERROR_SUCCESS )
{
found_it = TRUE;
}
RegCloseKey( KeyHandle );
}
RegCloseKey( RegistryHandle );
}
}
if (! found_it)
{
message(TRUE, "Could not find emacs_dir in Registry (searched HKCU and HKLM)");
}
else
{
if ( size_of_buffer > len )
pBuf[0] = 0; /* string too long for buffer */
else
{
memcpy( pBuf, temp_string, size_of_buffer );
ret = 1;
}
}
#endif
return ret;
}
/* Decode the options from argv and argc.
The global variable `optind' will say how many arguments we used up. */
void
decode_options (argc, argv)
int argc;
char **argv;
{
char* env_start_timeout = getenv ("EMACSCLIENT_START_TIMEOUT");
alternate_editor = getenv ("EMACS_ALTERNATE_EDITOR");
if (! alternate_editor)
alternate_editor = getenv ("ALTERNATE_EDITOR");
if (env_start_timeout)
{
start_timeout = env_start_timeout;
}
else
{
start_timeout = "60";
}
while (1)
{
int opt = getopt_long (argc, argv,
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
"VHnea:s:f:d:",
#else
"VHnea:f:d:",
#endif
longopts, 0);
if (opt == EOF)
break;
switch (opt)
{
case 0:
/* If getopt returns 0, then it has already processed a
long-named option. We should do nothing. */
break;
case 'a':
alternate_editor = optarg;
break;
case 't':
start_timeout = optarg;
break;
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
case 's':
socket_name = optarg;
break;
#endif
case 'f':
server_file = optarg;
break;
case 'd':
display = optarg;
break;
case 'n':
nowait = 1;
break;
case 'e':
eval = 1;
break;
case 'V':
message (FALSE, "emacsclient %s\n", VERSION);
exit (EXIT_SUCCESS);
break;
case 'H':
print_help_and_exit ();
break;
default:
message (TRUE, "Try `%s --help' for more information\n", progname);
exit (EXIT_FAILURE);
break;
}
}
if (start_timeout)
{
if (1 != sscanf(start_timeout, "%d", &start_timeout_int))
{
message (TRUE, "Invalid value to --start-timeout=%s", start_timeout);
exit (EXIT_FAILURE);
}
}
}
void
print_help_and_exit ()
{
message (FALSE,
"Usage: %s [OPTIONS] [FILE...]\n\
\n\
Tell the Emacs server to visit the specified files. Or, if no files\n\
are given then show the latest Emacs frame used.\n\
Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\
\n\
The following OPTIONS are accepted:\n\
-V, --version Just print a version info and return\n\
-H, --help Print this usage information message\n\
-n, --no-wait Don't wait for the server to return\n\
If no arguments are given emacsclient never waits\n\
-e, --eval Evaluate the FILE arguments as ELisp expressions\n\
-d, --display=DISPLAY Visit the file in the given display\n"
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
"-s, --socket-name=FILENAME\n\
Set the filename of the UNIX socket for communication\n"
#endif
"-f, --server-file=FILENAME\n\
Set the filename of the TCP configuration file\n\
-a, --alternate-editor=EDITOR\n\
Editor to fallback to if the server is not running\n\
-t, --start-timeout=SECONDS\n\
If given wait that many seconds for emacs server\n\
after launching alternate editor\n\
\n\
Report bugs to bug-gnu-emacs@gnu.org.\n", progname);
exit (EXIT_SUCCESS);
}
\f
/*
Try to run a different command, or --if no alternate editor is
defined-- exit with an errorcode.
*/
void
fail (argc, argv)
int argc;
char **argv;
{
exit (EXIT_FAILURE);
}
\f
#if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS)
int
main (argc, argv)
int argc;
char **argv;
{
message (TRUE, "%s: Sorry, the Emacs server is supported only\non systems with Berkely sockets.\n",
argv[0]);
fail (argc, argv);
}
#else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
#ifdef WINDOWSNT
# include <winsock2.h>
#else
# include <sys/types.h>
# include <sys/socket.h>
# include <sys/un.h>
# include <sys/stat.h>
# include <errno.h>
#endif
#define AUTH_KEY_LENGTH 64
#define SEND_BUFFER_SIZE 4096
extern char *strerror ();
extern int errno;
/* Buffer to accumulate data to send in TCP connections. */
char send_buffer[SEND_BUFFER_SIZE + 1];
int sblen = 0; /* Fill pointer for the send buffer. */
/* Let's send the data to Emacs when either
- the data ends in "\n", or
- the buffer is full (but this shouldn't happen)
Otherwise, we just accumulate it. */
void
send_to_emacs (s, data)
HSOCKET s;
char *data;
{
while (data)
{
int dlen = strlen (data);
if (dlen + sblen >= SEND_BUFFER_SIZE)
{
int part = SEND_BUFFER_SIZE - sblen;
strncpy (&send_buffer[sblen], data, part);
data += part;
sblen = SEND_BUFFER_SIZE;
}
else if (dlen)
{
strcpy (&send_buffer[sblen], data);
data = NULL;
sblen += dlen;
}
else
break;
if (sblen == SEND_BUFFER_SIZE
|| (sblen > 0 && send_buffer[sblen-1] == '\n'))
{
int sent = send (s, send_buffer, sblen, 0);
if (sent != sblen)
strcpy (send_buffer, &send_buffer[sent]);
sblen -= sent;
}
}
}
/* In NAME, insert a & before each &, each space, each newline, and
any initial -. Change spaces to underscores, too, so that the
return value never contains a space. */
void
quote_file_name (s, name)
HSOCKET s;
char *name;
{
char *copy = (char *) malloc (strlen (name) * 2 + 1);
char *p, *q;
p = name;
q = copy;
while (*p)
{
if (*p == ' ')
{
*q++ = '&';
*q++ = '_';
p++;
}
else if (*p == '\n')
{
*q++ = '&';
*q++ = 'n';
p++;
}
else
{
if (*p == '&' || (*p == '-' && p == name))
*q++ = '&';
*q++ = *p++;
}
}
*q++ = 0;
SEND_STRING (copy);
free (copy);
}
int
file_name_absolute_p (filename)
const unsigned char *filename;
{
/* Sanity check, it shouldn't happen. */
if (! filename) return FALSE;
/* /xxx is always an absolute path. */
if (filename[0] == '/') return TRUE;
/* Empty filenames (which shouldn't happen) are relative. */
if (filename[0] == '\0') return FALSE;
#ifdef WINDOWSNT
/* X:\xxx is always absolute; X:xxx is an error and will fail. */
if (islower (tolower (filename[0]))
&& filename[1] == ':' && filename[2] == '\\')
return TRUE;
/* Both \xxx and \\xxx\yyy are absolute. */
if (filename[0] == '\\') return TRUE;
#endif
return FALSE;
}
#ifdef WINDOWSNT
/* Wrapper to make WSACleanup a cdecl, as required by atexit(). */
void
__cdecl close_winsock ()
{
WSACleanup ();
}
/* Initialize the WinSock2 library. */
void
initialize_sockets ()
{
WSADATA wsaData;
if (WSAStartup (MAKEWORD (2, 0), &wsaData))
{
message (TRUE, "%error initializing WinSock2");
exit (EXIT_FAILURE);
}
atexit (close_winsock);
}
#endif /* WINDOWSNT */
\f
/* Get absolute path to server file */
void
get_full_server_file(char* buf)
{
FILE *config = NULL;
int found = 0;
*buf = '\0';
if (file_name_absolute_p (server_file))
strcpy(buf, server_file);
else
{
char *home = getenv ("HOME");
if (home)
{
sprintf (buf, "%s/.emacs.d/server/%s", home, server_file);
found = (access (buf, R_OK) == 0);
}
#ifdef WINDOWSNT
if (!found && (home = getenv ("APPDATA")))
{
sprintf (buf, "%s/.emacs.d/server/%s", home, server_file);
}
#endif
}
}
/*
* Read the information needed to set up a TCP comm channel with
* the Emacs server: host, port, pid and authentication string.
*/
int
get_server_config (server, authentication, islocal)
struct sockaddr_in *server;
char *authentication;
int *islocal;
{
char dotted[32];
char *port;
char *pid;
FILE *config = NULL;
char *full_server_file;
char *myhostname = alloca(2*255);
struct hostent *myhostent;
full_server_file = alloca(2*MAX_PATH);
get_full_server_file(full_server_file);
config = fopen (full_server_file, "rb");
if (! config)
return FALSE;
if (fgets (dotted, sizeof dotted, config)
&& (port = strchr (dotted, ':'))
&& (pid = strchr (port, ' ')))
{
*port++ = '\0';
*pid++ = '\0';
}
else
{
message (TRUE, "invalid configuration info");
exit (EXIT_FAILURE);
}
if (0 == strcmp("127.0.0.1", dotted))
{
//printf("127.0.0.1\n");
*islocal = 1;
}
else
{
*islocal = 0;
//printf ("dotted=(%s)\n", dotted);
gethostname(myhostname, 255);
//printf("myhostname=%s\n", myhostname);
myhostent = gethostbyname(myhostname);
if (NULL == myhostent)
{
message(TRUE, "Error calling gethostbyname(): %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
//printf("Hostname : %s\n",myhostent->h_name); /* prints the hostname */
//printf("IP Address: %s\n",inet_ntoa(*((struct in_addr *)myhostent->h_addr))); /* prints IP address */
if (0 == strcmp(dotted, inet_ntoa(*((struct in_addr *)myhostent->h_addr))))
{
*islocal = 1;
}
else
{
int i = 0;
struct in_addr myaddr;
while (! *islocal)
{
u_long *address = (u_long *) myhostent->h_addr_list[i++];
if (address == 0) break;
myaddr.S_un.S_addr = *address;
if (0 == strcmp(dotted, inet_ntoa (myaddr)))
*islocal = 1;
}
}
}
//printf("here again \n");
server->sin_family = AF_INET;
server->sin_addr.s_addr = inet_addr (dotted);
server->sin_port = htons (atoi (port));
if (! fread (authentication, AUTH_KEY_LENGTH, 1, config))
{
message (TRUE, "cannot read authentication info");
exit (EXIT_FAILURE);
}
fclose (config);
#ifdef WINDOWSNT
/*
Modern Windows restrict which processes can set the foreground window.
So, for emacsclient to be able to force Emacs into the foreground, we
have to call AllowSetForegroundWindow(). Unfortunately, older Windows
(W95, W98 and NT) don't have this function, so we have to check first.
We're doing this here because it has to be done before sending info
to Emacs, and otherwise we'll need a global variable just to pass around
the pid, which is also inelegant.
*/
{
HMODULE hUser32;
if (hUser32 = LoadLibrary ("user32.dll"))
{
FARPROC set_fg;
if (set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow"))
set_fg (atoi (pid));
FreeLibrary (hUser32);
}
}
#endif
return TRUE;
}
HSOCKET
set_tcp_socket (silent, islocal)
int silent;
int *islocal;
{
HSOCKET s;
static struct sockaddr_in server;
struct linger l_arg = {1, 1};
static char auth_string[AUTH_KEY_LENGTH + 1];
static int islocal2 = -1;
if (-1 == islocal2)
if (! get_server_config (&server, auth_string, &islocal2))
return INVALID_SOCKET;
*islocal = islocal2;
if (server.sin_addr.s_addr != inet_addr ("127.0.0.1"))
message (TRUE, "connected to remote socket at %s\n",
inet_ntoa (server.sin_addr));
/*
* Open up an AF_INET socket
*/
if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
message (TRUE, "socket: %s\n", strerror(errno));
return INVALID_SOCKET;
}
/*
* Set up the socket
*/
if (connect (s, (struct sockaddr *) &server, sizeof server) < 0)
{
if (!silent) message (TRUE, "connect: %s\n", strerror(errno));
return INVALID_SOCKET;
}
setsockopt (s, SOL_SOCKET, SO_LINGER, (char *) &l_arg, sizeof l_arg);
/*
* Send the authentication
*/
auth_string[AUTH_KEY_LENGTH] = '\0';
SEND_STRING ("-auth ");
SEND_STRING (auth_string);
SEND_STRING ("\n");
return s;
}
#if !defined (NO_SOCKETS_IN_FILE_SYSTEM)
/* Three possibilities:
2 - can't be `stat'ed (sets errno)
1 - isn't owned by us
0 - success: none of the above */
static int
socket_status (socket_name)
char *socket_name;
{
struct stat statbfr;
if (stat (socket_name, &statbfr) == -1)
return 2;
if (statbfr.st_uid != geteuid ())
return 1;
return 0;
}
HSOCKET
set_local_socket (silent)
{
HSOCKET s;
struct sockaddr_un server;
/*
* Open up an AF_UNIX socket in this person's home directory
*/
if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
{
message (TRUE, "socket: %s\n", strerror(errno));
return INVALID_SOCKET;
}
server.sun_family = AF_UNIX;
{
int sock_status = 0;
int default_sock = !socket_name;
int saved_errno;
char *server_name = "server";
if (socket_name && !index (socket_name, '/') && !index (socket_name, '\\'))
{ /* socket_name is a file name component. */
server_name = socket_name;
socket_name = NULL;
default_sock = 1; /* Try both UIDs. */
}
if (default_sock)
{
socket_name = alloca (2*(100 + strlen (server_name)));
sprintf (socket_name, "/tmp/emacs%d/%s",
(int) geteuid (), server_name);
}
if (strlen (socket_name) < sizeof (server.sun_path))
strcpy (server.sun_path, socket_name);
else
{
message (TRUE, "socket-name %s too long",
socket_name);
exit (EXIT_FAILURE);
}
/* See if the socket exists, and if it's owned by us. */
sock_status = socket_status (server.sun_path);
saved_errno = errno;
if (sock_status && default_sock)
{
/* Failing that, see if LOGNAME or USER exist and differ from
our euid. If so, look for a socket based on the UID
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");
if (!user_name)
user_name = (char *) getenv ("USER");
if (user_name)
{
struct passwd *pw = getpwnam (user_name);
if (pw && (pw->pw_uid != geteuid ()))
{
/* We're running under su, apparently. */
socket_name = alloca (2*(100 + strlen (server_name)));
sprintf (socket_name, "/tmp/emacs%d/%s",
(int) pw->pw_uid, server_name);
if (strlen (socket_name) < sizeof (server.sun_path))
strcpy (server.sun_path, socket_name);
else
{
message (TRUE, "socket-name %s too long",
socket_name);
exit (EXIT_FAILURE);
}
sock_status = socket_status (server.sun_path);
saved_errno = errno;
}
else
errno = saved_errno;
}
}
switch (sock_status)
{
case 1:
/* There's a socket, but it isn't owned by us. This is OK if
we are root. */
if (0 != geteuid ())
{
message (TRUE, "Invalid socket owner\n");
return INVALID_SOCKET;
}
break;
case 2:
/* `stat' failed */
if (saved_errno == ENOENT)
message (TRUE,
"can't find socket; have you started the server?\n\
To start the server in Emacs, type \"M-x server-start\".\n");
else
message (TRUE, "can't stat %s: %s\n",
server.sun_path, strerror (saved_errno));
return INVALID_SOCKET;
}
}
if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
< 0)
{
if (!silent) message (TRUE, "connect: %s\n", strerror(errno));
return INVALID_SOCKET;
}
return s;
}
#endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */
HSOCKET
set_socket (silent, islocal)
int silent;
int *islocal;
{
HSOCKET s;
int islocal2;
INITIALIZE ();
*islocal = 1;
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
/* Explicit --socket-name argument. */
if (socket_name)
{
s = set_local_socket (silent);
//if ((s != INVALID_SOCKET) || alternate_editor)
return s;
message (TRUE, "error accessing socket \"%s\"",
socket_name);
exit (EXIT_FAILURE);
}
#endif
/* Explicit --server-file arg or EMACS_SERVER_FILE variable. */
if (!server_file)
server_file = getenv ("EMACS_SERVER_FILE");
if (server_file)
{
s = set_tcp_socket (silent, &islocal2);
*islocal = islocal2;
//if ((s != INVALID_SOCKET) || alternate_editor)
return s;
message (TRUE, "error accessing server file \"%s\"",
server_file);
exit (EXIT_FAILURE);
}
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
/* Implicit local socket. */
s = set_local_socket (silent);
if (s != INVALID_SOCKET)
return s;
#endif
/* Implicit server file. */
server_file = "server";
s = set_tcp_socket (silent, &islocal2);
*islocal = islocal2;
//if ((s != INVALID_SOCKET) || alternate_editor)
return s;
return INVALID_SOCKET;
/* No implicit or explicit socket, and no alternate editor. */
message (TRUE, "No socket or alternate editor. Please use:\n\n"
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
"\t--socket-name\n"
#endif
"\t--server-file (or environment variable EMACS_SERVER_FILE)\n\
\t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n");
exit (EXIT_FAILURE);
}
void
launch_editor (argc, argv)
int argc;
char **argv;
{
char *cmd_line;
char *full_server_file;
char *p;
char *mypath;
char *emacsexe;
char *systemexec;
mypath = alloca(2*MAX_PATH);
strcpy(mypath, "");
if (server_file)
{
char *setbuf;
full_server_file = alloca(2*MAX_PATH);
get_full_server_file(full_server_file);
setbuf = alloca(2*(strlen(full_server_file)+32));
strcpy(setbuf, "EMACS_SERVER_FILE=");
strcat(setbuf, full_server_file);
putenv(setbuf);
strcpy(setbuf, "EMACSCLIENT_STARTING_SERVER=yes");
putenv(setbuf);
}
if (alternate_editor)
{
cmd_line = alternate_editor;
}
else
{
cmd_line = alloca(2*(MAX_PATH + 16));
strcpy(cmd_line, "");
#ifdef WINDOWSNT
emacsexe = "runemacs.exe";
systemexec = "systemexec.exe";
#else
emacsexe = "emacs";
systemexec = "systemexec";
#endif
if ( get_emacs_dir( mypath, MAX_PATH ) )
{
strcat(mypath, "/bin/");
}
if (strlen(mypath) == 0)
/* Get a possibly relative path to emacs bin directory. */
{
if (argv[0])
strcpy(mypath, argv[0]);
char* p = strstr(mypath, "emacsclient");
if (p)
{
*p = '\0';
}
else
{
strcpy(mypath, "");
}
}
strcpy(cmd_line, mypath);
strcat(cmd_line, emacsexe);
if ((strlen(mypath) > 0) && (access (cmd_line, X_OK) != 0))
{
message(TRUE, "Can't find %s\n", cmd_line);
exit (EXIT_FAILURE);
}
strcat(cmd_line, " -l auto-server");
}
//message(FALSE, "before starting %s\n", cmd_line);
#ifdef WINDOWSNT
//message(FALSE, "WINDOSWNT\n");
{
STARTUPINFO start;
PROCESS_INFORMATION child;
memset (&start, 0, sizeof (start));
start.cb = sizeof (start);
start.dwFlags = STARTF_USESHOWWINDOW | STARTF_USECOUNTCHARS;
start.wShowWindow = SW_HIDE;
/* Ensure that we don't waste memory if the user has specified a huge
default screen buffer for command windows. */
start.dwXCountChars = 80;
start.dwYCountChars = 25;
if (!CreateProcess (NULL, cmd_line, NULL, NULL, TRUE, NORMAL_PRIORITY_CLASS,
NULL, NULL, &start, &child))
{
message (TRUE, "Could not run %s\n", cmd_line);
show_w32sys_error1("CreateProcess failed");
exit (EXIT_FAILURE);
}
}
#else /* not WINDOWSNT */
#ifdef HAVE_WORKING_VFORK
//message(FALSE, "FORK\n");
signal(SIGCLD, SIG_IGN); /* So the fork child can finish without wait here */
switch(pid=fork()) {
case -1:
message (TRUE, "fork error, still in parent - %s\n", strerror(errno));
exit (EXIT_FAILURE);
case 0:
//message(FALSE, "forked ok, in CHILD!\n");
{
int i = optind - 1;
execvp (cmd_line, argv + i);
}
message (TRUE, "fork, child - error executing alternate editor \"%s\": %s\n",
cmd_line, strerror(errno));
exit (EXIT_FAILURE);
default:
//message(FALSE, "forked ok, in PARENT!\n");
}
#else /* no working fork */
//message(FALSE, "NO FORK\n");
{
char system_cmd_line[MAX_PATH*2];
if (strlen(mypath))
{
strcpy(system_cmd_line, mypath);
strcat(system_cmd_line, systemexec);
if (access (system_cmd_line, X_OK) != 0)
{
message(TRUE, "Can't find %s\n", system_cmd_line);
exit (EXIT_FAILURE);
}
}
else
{
strcpy(system_cmd_line, systemexec);
}
strcat(system_cmd_line, " ");
strcat(system_cmd_line, cmd_line);
//message(FALSE, "system_cmd_line=%s\n", system_cmd_line);
int ret;
switch (ret = system(system_cmd_line)) {
case EXIT_SUCCESS:
break;
case EXIT_FAILURE:
message(TRUE, "Error, 'system(%s)' returned EXIT_FAILURE, strerror(errno)=%s\n", system_cmd_line, strerror(errno));
exit(EXIT_FAILURE);
case -1:
message(TRUE, "Error, 'system(%s)' returned -1, strerror(errno)=%s\n", system_cmd_line, strerror(errno));
exit(EXIT_FAILURE);
default:
/* w32 ret=25: "systemexec emacs -l auto-server", where emacs is not in the path
w32 ret=37: "systemexec.exe oo-spd\i386\emacs -l auto-server", where emacs is not there
w32 ret=59: "xc:\path\systemexec.exe oo-spd\i386\emacs -l auto-server"
*/
message(TRUE, "Error, 'system(%s)' returned %d, strerror(errno)=%s\n", system_cmd_line, ret, strerror(errno));
exit(EXIT_FAILURE);
}
}
#endif
#endif
//message(FALSE, "after starting %s\n", cmd_line);
}
int
main (argc, argv)
int argc;
char **argv;
{
HSOCKET s;
int i, rl, needlf = 0;
char *cwd;
char string[BUFSIZ+1];
progname = argv[0];
/* Process options. */
decode_options (argc, argv);
// Seems more natural to start the server than fail here:
/* if ((argc - optind < 1) && !eval) */
/* { */
/* message (TRUE, "file name or argument required\nTry `%s --help' for more information\n", */
/* progname); */
/* exit (EXIT_FAILURE); */
/* } */
/* No message box popups when we wait. */
int islocal = 1;
if ((s = set_socket ( alternate_editor || (start_timeout_int > 0) , &islocal)) == INVALID_SOCKET)
{
if (alternate_editor || (islocal && (start_timeout_int > 0)))
{
launch_editor(argc, argv);
}
else
{
if (islocal)
{
message(TRUE, "The requested local Emacs server is not running\n");
}
else
{
message(TRUE, "The requested Emacs remote server is not running\n");
}
exit(EXIT_FAILURE);
}
printf("Waiting for Emacs server to start ..");
while ( ((s = set_socket ( 1 != start_timeout_int, &islocal )) == INVALID_SOCKET) && (start_timeout_int-- > 0) )
{
if (start_timeout_int == 0) exit (EXIT_FAILURE);
//if (0 == start_timeout_int % 2)
printf(".");
sleep(1);
}
printf(" connected.\n");
}
#ifdef HAVE_GETCWD
cwd = getcwd (string, sizeof string);
#else
cwd = getwd (string);
#endif
if (cwd == 0)
{
/* getwd puts message in STRING if it fails. */
#ifdef HAVE_GETCWD
message (TRUE, "%s (%s)\n",
"Cannot get current working directory", strerror (errno));
#else
message (TRUE, "%s (%s)\n", string, strerror (errno));
#endif
fail (argc, argv);
}
if ((argc - optind < 1) && !eval)
{
/* If there is nothing to do just raise the selected frame */
SEND_STRING ("-eval (raise-frame) ");
}
if (nowait)
SEND_STRING ("-nowait ");
if (eval)
SEND_STRING ("-eval ");
if (display)
{
SEND_STRING ("-display ");
SEND_QUOTED (display);
SEND_STRING (" ");
}
if ((argc - optind > 0))
{
for (i = optind; i < argc; i++)
{
if (eval)
; /* Don't prepend any cwd or anything like that. */
else if (*argv[i] == '+')
{
char *p = argv[i] + 1;
while (isdigit ((unsigned char) *p) || *p == ':') p++;
if (*p != 0)
{
SEND_QUOTED (cwd);
SEND_STRING ("/");
}
}
else if (! file_name_absolute_p (argv[i]))
{
SEND_QUOTED (cwd);
SEND_STRING ("/");
}
SEND_QUOTED (argv[i]);
SEND_STRING (" ");
}
}
else
{
/* FIX-ME: For some reason must avoid the loop here if no
args. Maybe nothing to read from stdin? */
if (!((argc - optind < 1) && !eval) )
{
while (fgets (string, BUFSIZ, stdin))
{
SEND_QUOTED (string);
}
}
else
{
/* Do not wait if there are no arguments */
nowait = 1;
}
SEND_STRING (" ");
}
SEND_STRING ("\n");
/* Maybe wait for an answer. */
if (!nowait)
{
if (!eval)
{
printf ("Waiting for Emacs editing to be ready ...");
needlf = 2;
}
fflush (stdout);
/* Now, wait for an answer and print any messages. */
while ((rl = recv (s, string, BUFSIZ, 0)) > 0)
{
string[rl] = '\0';
if (needlf == 2)
printf ("\n");
printf ("%s", string);
needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n';
}
if (needlf)
printf ("\n");
fflush (stdout);
}
CLOSE_SOCKET (s);
return EXIT_SUCCESS;
}
#endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
#ifndef HAVE_STRERROR
char *
strerror (errnum)
int errnum;
{
extern char *sys_errlist[];
extern int sys_nerr;
if (errnum >= 0 && errnum < sys_nerr)
return sys_errlist[errnum];
return (char *) "Unknown error";
}
#endif /* ! HAVE_STRERROR */
/* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7
(do not change this comment) */
/* emacsclient.c ends here */
[-- Attachment #3: Type: text/plain, Size: 142 bytes --]
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