/* 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.
+ 2005, 2006, 2007 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)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
#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 HAVE_SOCKETS
-# define HAVE_INET_SOCKETS
# define NO_SOCKETS_IN_FILE_SYSTEM
# define HSOCKET SOCKET
#else /* !WINDOWSNT */
+# include <sys/types.h>
+
# ifdef HAVE_INET_SOCKETS
# include <netinet/in.h>
# endif
#undef signal
+#include <stdarg.h>
#include <ctype.h>
#include <stdio.h>
#include "getopt.h"
# include <pwd.h>
#endif /* not WINDOWSNT */
#endif /* not VMS */
+#include <sys/stat.h>
+
+#include <signal.h>
+#include <errno.h>
+
+/* From lisp.h */
+#ifndef DIRECTORY_SEP
+#define DIRECTORY_SEP '/'
+#endif
+#ifndef IS_DIRECTORY_SEP
+#define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP)
+#endif
+#ifndef IS_DEVICE_SEP
+#ifndef DEVICE_SEP
+#define IS_DEVICE_SEP(_c_) 0
+#else
+#define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP)
+#endif
+#endif
+#ifndef IS_ANY_SEP
+#define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_))
+#endif
+
+\f
char *getenv (), *getwd ();
char *(getcwd) ();
#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
/* Name used to invoke this program. */
char *progname;
+/* The first argument to main. */
+int main_argc;
+
+/* The second argument to main. */
+char **main_argv;
+
/* 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;
+/* Nonzero means don't open a new frame. --current-frame. */
+int current_frame = 0;
+
+/* Nonzero means open a new graphical frame. */
+int window_system = 0;
+
/* The display on which Emacs should work. --display. */
char *display = NULL;
+/* Nonzero means open a new Emacs frame on the current terminal. */
+int tty = 0;
+
/* If non-NULL, the name of an editor to fallback to if the server
is not running. --alternate-editor. */
const char *alternate_editor = NULL;
/* If non-NULL, the filename of the authentication file. */
char *server_file = NULL;
+/* PID of the Emacs server process. */
+int emacs_pid = 0;
+
void print_help_and_exit () NO_RETURN;
struct option longopts[] =
{ "eval", no_argument, NULL, 'e' },
{ "help", no_argument, NULL, 'H' },
{ "version", no_argument, NULL, 'V' },
+ { "tty", no_argument, NULL, 't' },
+ { "current-frame", no_argument, NULL, 'c' },
{ "alternate-editor", required_argument, NULL, 'a' },
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
{ "socket-name", required_argument, NULL, 's' },
{ 0, 0, 0, 0 }
};
+\f
+/* Like malloc but get fatal error if memory is exhausted. */
+
+long *
+xmalloc (size)
+ unsigned int size;
+{
+ long *result = (long *) malloc (size);
+ if (result == NULL)
+ {
+ perror ("malloc");
+ exit (EXIT_FAILURE);
+ }
+ return result;
+}
+
+/* Like strdup but get a fatal error if memory is exhausted. */
+
+char *
+xstrdup (const char *s)
+{
+ char *result = strdup (s);
+ if (result == NULL)
+ {
+ perror ("strdup");
+ exit (EXIT_FAILURE);
+ }
+ return result;
+}
+
+/* From sysdep.c */
+#if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
+
+/* Return the current working directory. Returns NULL on errors.
+ 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 ()
+{
+ char *buf;
+ char *pwd;
+ struct stat dotstat, pwdstat;
+ /* 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
+ && (IS_DIRECTORY_SEP (*pwd) || (*pwd && IS_DEVICE_SEP (pwd[1])))
+ && stat (pwd, &pwdstat) == 0
+ && stat (".", &dotstat) == 0
+ && dotstat.st_ino == pwdstat.st_ino
+ && dotstat.st_dev == pwdstat.st_dev
+#ifdef MAXPATHLEN
+ && strlen (pwd) < MAXPATHLEN
+#endif
+ )
+ {
+ buf = (char *) xmalloc (strlen (pwd) + 1);
+ if (!buf)
+ return NULL;
+ strcpy (buf, pwd);
+ }
+#ifdef HAVE_GETCWD
+ else
+ {
+ size_t buf_size = 1024;
+ buf = (char *) xmalloc (buf_size);
+ if (!buf)
+ return NULL;
+ for (;;)
+ {
+ if (getcwd (buf, buf_size) == buf)
+ break;
+ if (errno != ERANGE)
+ {
+ int tmp_errno = errno;
+ free (buf);
+ errno = tmp_errno;
+ return NULL;
+ }
+ buf_size *= 2;
+ buf = (char *) realloc (buf, buf_size);
+ if (!buf)
+ return NULL;
+ }
+ }
+#else
+ else
+ {
+ /* We need MAXPATHLEN here. */
+ buf = (char *) xmalloc (MAXPATHLEN + 1);
+ if (!buf)
+ return NULL;
+ if (getwd (buf) == NULL)
+ {
+ int tmp_errno = errno;
+ free (buf);
+ errno = tmp_errno;
+ return NULL;
+ }
+ }
+#endif
+ return buf;
+}
+#endif
+
+/* Message functions. */
+
+#ifdef WINDOWSNT
+int
+w32_window_app ()
+{
+ static int window_app = -1;
+ char szTitle[MAX_PATH];
+
+ if (window_app < 0)
+ /* Checking for STDOUT does not work; it's a valid handle also in
+ nonconsole apps. Testing for the console title seems to work. */
+ window_app = (GetConsoleTitleA (szTitle, MAX_PATH) == 0);
+
+ return window_app;
+}
+
+/*
+ execvp wrapper for Windows. Quotes arguments with embedded spaces.
+
+ This is necessary due to the broken implementation of exec* routines in
+ the Microsoft libraries: they concatenate the arguments together without
+ quoting special characters, and pass the result to CreateProcess, with
+ predictably bad results. By contrast, Posix execvp passes the arguments
+ directly into the argv array of the child process.
+*/
+int
+w32_execvp (path, argv)
+ char *path;
+ char **argv;
+{
+ int i;
+
+ /* Required to allow a .BAT script as alternate editor. */
+ argv[0] = (char *) alternate_editor;
+
+ for (i = 0; argv[i]; i++)
+ if (strchr (argv[i], ' '))
+ {
+ char *quoted = alloca (strlen (argv[i]) + 3);
+ sprintf (quoted, "\"%s\"", argv[i]);
+ argv[i] = quoted;
+ }
+
+ return execvp (path, argv);
+}
+
+#undef execvp
+#define execvp w32_execvp
+
+#endif /* WINDOWSNT */
+
+void
+message (int is_error, char *message, ...)
+{
+ char msg [2048];
+ va_list args;
+
+ va_start (args, message);
+ 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
+ {
+ FILE *f = is_error ? stderr : stdout;
+
+ fputs (msg, f);
+ fflush (f);
+ }
+}
+
/* Decode the options from argv and argc.
The global variable `optind' will say how many arguments we used up. */
char **argv;
{
alternate_editor = getenv ("ALTERNATE_EDITOR");
+ display = getenv ("DISPLAY");
+ if (display && strlen (display) == 0)
+ display = NULL;
while (1)
{
int opt = getopt_long (argc, argv,
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
- "VHnea:s:f:d:",
+ "VHnea:s:f:d:tc",
#else
- "VHnea:f:d:",
+ "VHnea:f:d:tc",
#endif
- longopts, 0);
+ longopts, 0);
if (opt == EOF)
break;
break;
case 'V':
- printf ("emacsclient %s\n", VERSION);
+ message (FALSE, "emacsclient %s\n", VERSION);
exit (EXIT_SUCCESS);
break;
+ case 't':
+ tty = 1;
+ break;
+
+ case 'c':
+ current_frame = 1;
+ break;
+
case 'H':
print_help_and_exit ();
break;
default:
- fprintf (stderr, "Try `%s --help' for more information\n", progname);
+ message (TRUE, "Try `%s --help' for more information\n", progname);
exit (EXIT_FAILURE);
break;
}
}
+
+ if (!tty && display)
+ window_system = 1;
+#if !defined (WINDOWSNT) && !defined (HAVE_CARBON)
+ else
+ tty = 1;
+#endif
+
+ /* --no-wait implies --current-frame on ttys when there are file
+ arguments or expressions given. */
+ if (nowait && tty && argc - optind > 0)
+ current_frame = 1;
+
+ if (current_frame)
+ {
+ tty = 0;
+ window_system = 0;
+ }
+
+ if (tty)
+ window_system = 0;
}
+\f
void
print_help_and_exit ()
{
- printf (
- "Usage: %s [OPTIONS] FILE...\n\
+ /* Spaces and tabs are significant in this message; they're chosen so the
+ message aligns properly both in a tty and in a Windows message box.
+ Please try to preserve them; otherwise the output is very hard to read
+ when using emacsclientw. */
+ message (FALSE,
+ "Usage: %s [OPTIONS] FILE...\n\
Tell the Emacs server to visit the specified files.\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\
--e, --eval Evaluate the FILE arguments as ELisp expressions\n\
--d, --display=DISPLAY Visit the file in the given display\n"
+-V, --version Just print version info and return\n\
+-H, --help Print this usage information message\n\
+-t, --tty Open a new Emacs frame on the current terminal\n\
+-c, --current-frame Do not create a new frame;\n\
+ use the current Emacs frame\n\
+-e, --eval Evaluate the FILE arguments as ELisp expressions\n\
+-n, --no-wait Don't wait for the server to return\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"
+ Set filename of the UNIX socket for communication\n"
#endif
"-f, --server-file=FILENAME\n\
- Set the filename of the TCP configuration file\n\
+ Set filename of the TCP authentication file\n\
-a, --alternate-editor=EDITOR\n\
- Editor to fallback to if the server is not running\n\
+ Editor to fallback to if the server is not running\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;
+fail (void)
{
if (alternate_editor)
{
int i = optind - 1;
-#ifdef WINDOWSNT
- argv[i] = (char *)alternate_editor;
-#endif
- execvp (alternate_editor, argv + i);
- fprintf (stderr, "%s: error executing alternate editor \"%s\"\n",
- progname, alternate_editor);
+
+ execvp (alternate_editor, main_argv + i);
+ message (TRUE, "%s: error executing alternate editor \"%s\"\n",
+ progname, alternate_editor);
}
exit (EXIT_FAILURE);
}
int argc;
char **argv;
{
- fprintf (stderr, "%s: Sorry, the Emacs server is supported only\n",
+ main_argc = argc;
+ main_argv = argv;
+ progname = argv[0];
+ message (TRUE, "%s: Sorry, the Emacs server is supported only\n"
+ "on systems with Berkeley sockets.\n",
argv[0]);
- fprintf (stderr, "on systems with Berkeley sockets.\n");
-
- fail (argc, argv);
+ fail ();
}
#else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
/* 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. */
+/* Socket used to communicate with the Emacs server process. */
+HSOCKET emacs_socket = 0;
/* Let's send the data to Emacs when either
- the data ends in "\n", or
}
}
-/* In NAME, insert a & before each &, each space, each newline, and
+\f
+/* In STR, 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. */
+ return value never contains a space.
+
+ Does not change the string. Outputs the result to STREAM. */
void
-quote_file_name (s, name)
+quote_argument (s, str)
HSOCKET s;
- char *name;
+ char *str;
{
- char *copy = (char *) malloc (strlen (name) * 2 + 1);
+ char *copy = (char *) xmalloc (strlen (str) * 2 + 1);
char *p, *q;
- p = name;
+ p = str;
q = copy;
while (*p)
{
}
else
{
- if (*p == '&' || (*p == '-' && p == name))
+ if (*p == '&' || (*p == '-' && p == str))
*q++ = '&';
*q++ = *p++;
}
}
*q++ = 0;
- SEND_STRING (copy);
+ send_to_emacs (s, copy);
free (copy);
}
+
+/* The inverse of quote_argument. Removes quoting in string STR by
+ modifying the string in place. Returns STR. */
+
+char *
+unquote_argument (str)
+ char *str;
+{
+ char *p, *q;
+
+ if (! str)
+ return str;
+
+ p = str;
+ q = str;
+ while (*p)
+ {
+ if (*p == '&')
+ {
+ p++;
+ if (*p == '&')
+ *p = '&';
+ else if (*p == '_')
+ *p = ' ';
+ else if (*p == 'n')
+ *p = '\n';
+ else if (*p == '-')
+ *p = '-';
+ }
+ *q++ = *p++;
+ }
+ *q = 0;
+ return str;
+}
+
+\f
int
file_name_absolute_p (filename)
const unsigned char *filename;
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] == '\\')
+ /* X:\xxx is always absolute. */
+ if (isalpha (filename[0])
+ && filename[1] == ':' && (filename[2] == '\\' || filename[2] == '/'))
return TRUE;
/* 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;
}
#ifdef WINDOWSNT
-/* Wrapper to make WSACleanup a cdecl, as required by atexit(). */
+/* Wrapper to make WSACleanup a cdecl, as required by atexit. */
void
__cdecl close_winsock ()
{
if (WSAStartup (MAKEWORD (2, 0), &wsaData))
{
- fprintf (stderr, "%s: error initializing WinSock2", progname);
+ message (TRUE, "%s: error initializing WinSock2", progname);
exit (EXIT_FAILURE);
}
atexit (close_winsock);
}
#endif /* WINDOWSNT */
+
\f
/*
* Read the information needed to set up a TCP comm channel with
- * the Emacs server: host, port and authentication string.
-*/
+ * the Emacs server: host, port, pid and authentication string.
+ */
int
get_server_config (server, authentication)
struct sockaddr_in *server;
{
char dotted[32];
char *port;
+ char *pid;
FILE *config = NULL;
if (file_name_absolute_p (server_file))
else
{
char *home = getenv ("HOME");
-#ifdef WINDOWSNT
- if (! home)
- home = getenv ("APPDATA");
-#endif
+
if (home)
{
char *path = alloca (32 + strlen (home) + strlen (server_file));
sprintf (path, "%s/.emacs.d/server/%s", home, server_file);
config = fopen (path, "rb");
}
+#ifdef WINDOWSNT
+ if (!config && (home = getenv ("APPDATA")))
+ {
+ char *path = alloca (32 + strlen (home) + strlen (server_file));
+ sprintf (path, "%s/.emacs.d/server/%s", home, server_file);
+ config = fopen (path, "rb");
+ }
+#endif
}
if (! config)
return FALSE;
if (fgets (dotted, sizeof dotted, config)
- && (port = strchr (dotted, ':')))
+ && (port = strchr (dotted, ':'))
+ && (pid = strchr (port, ' ')))
{
*port++ = '\0';
+ *pid++ = '\0';
}
else
{
- fprintf (stderr, "%s: invalid configuration info", progname);
+ message (TRUE, "%s: invalid configuration info", progname);
exit (EXIT_FAILURE);
}
if (! fread (authentication, AUTH_KEY_LENGTH, 1, config))
{
- fprintf (stderr, "%s: cannot read authentication info", progname);
+ message (TRUE, "%s: cannot read authentication info", progname);
exit (EXIT_FAILURE);
}
fclose (config);
+ emacs_pid = atoi (pid);
+
return TRUE;
}
return INVALID_SOCKET;
if (server.sin_addr.s_addr != inet_addr ("127.0.0.1"))
- fprintf (stderr, "%s: connected to remote socket at %s\n",
+ message (FALSE, "%s: connected to remote socket at %s\n",
progname, inet_ntoa (server.sin_addr));
/*
*/
if ((s = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
{
- fprintf (stderr, "%s: ", progname);
- perror ("socket");
+ message (TRUE, "%s: socket: %s\n", progname, strerror (errno));
return INVALID_SOCKET;
}
*/
if (connect (s, (struct sockaddr *) &server, sizeof server) < 0)
{
- fprintf (stderr, "%s: ", progname);
- perror ("connect");
+ message (TRUE, "%s: connect: %s\n", progname, strerror (errno));
return INVALID_SOCKET;
}
*/
auth_string[AUTH_KEY_LENGTH] = '\0';
- SEND_STRING ("-auth ");
- SEND_STRING (auth_string);
- SEND_STRING ("\n");
+ send_to_emacs (s, "-auth ");
+ send_to_emacs (s, auth_string);
+ send_to_emacs (s, "\n");
return s;
}
+
+/* Returns 1 if PREFIX is a prefix of STRING. */
+static int
+strprefix (char *prefix, char *string)
+{
+ int i;
+ if (! prefix)
+ return 1;
+
+ if (!string)
+ return 0;
+
+ for (i = 0; prefix[i]; i++)
+ if (!string[i] || string[i] != prefix[i])
+ return 0;
+ return 1;
+}
+
+
#if !defined (NO_SOCKETS_IN_FILE_SYSTEM)
/* Three possibilities:
return 0;
}
+\f
+/* A signal handler that passes the signal to the Emacs process.
+ Useful for SIGWINCH. */
+
+SIGTYPE
+pass_signal_to_emacs (int signalnum)
+{
+ int old_errno = errno;
+
+ if (emacs_pid)
+ kill (emacs_pid, signalnum);
+
+ signal (signalnum, pass_signal_to_emacs);
+ errno = old_errno;
+}
+
+/* Signal handler for SIGCONT; notify the Emacs process that it can
+ now resume our tty frame. */
+
+SIGTYPE
+handle_sigcont (int signalnum)
+{
+ int old_errno = errno;
+
+ if (tcgetpgrp (1) == getpgrp ())
+ {
+ /* We are in the foreground. */
+ send_to_emacs (emacs_socket, "-resume \n");
+ }
+ else
+ {
+ /* We are in the background; cancel the continue. */
+ kill (getpid (), SIGSTOP);
+ }
+
+ signal (signalnum, handle_sigcont);
+ errno = old_errno;
+}
+
+/* Signal handler for SIGTSTP; notify the Emacs process that we are
+ going to sleep. Normally the suspend is initiated by Emacs via
+ server-handle-suspend-tty, but if the server gets out of sync with
+ reality, we may get a SIGTSTP on C-z. Handling this signal and
+ notifying Emacs about it should get things under control again. */
+
+SIGTYPE
+handle_sigtstp (int signalnum)
+{
+ int old_errno = errno;
+ sigset_t set;
+
+ if (emacs_socket)
+ send_to_emacs (emacs_socket, "-suspend \n");
+
+ /* Unblock this signal and call the default handler by temprarily
+ changing the handler and resignalling. */
+ sigprocmask (SIG_BLOCK, NULL, &set);
+ sigdelset (&set, signalnum);
+ signal (signalnum, SIG_DFL);
+ kill (getpid (), signalnum);
+ sigprocmask (SIG_SETMASK, &set, NULL); /* Let's the above signal through. */
+ signal (signalnum, handle_sigtstp);
+
+ errno = old_errno;
+}
+/* Set up signal handlers before opening a frame on the current tty. */
+
+void
+init_signals (void)
+{
+ /* Set up signal handlers. */
+ signal (SIGWINCH, pass_signal_to_emacs);
+
+ /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of
+ deciding which terminal the signal came from. C-g is now a
+ normal input event on secondary terminals. */
+#if 0
+ signal (SIGINT, pass_signal_to_emacs);
+ signal (SIGQUIT, pass_signal_to_emacs);
+#endif
+
+ signal (SIGCONT, handle_sigcont);
+ signal (SIGTSTP, handle_sigtstp);
+ signal (SIGTTOU, handle_sigtstp);
+}
+
+
HSOCKET
set_local_socket ()
{
if ((s = socket (AF_UNIX, SOCK_STREAM, 0)) < 0)
{
- fprintf (stderr, "%s: ", progname);
- perror ("socket");
+ message (TRUE, "%s: socket: %s\n", progname, strerror (errno));
return INVALID_SOCKET;
}
{
int sock_status = 0;
int default_sock = !socket_name;
- int saved_errno;
+ int saved_errno = 0;
+
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. */
+ server_name = socket_name;
+ socket_name = NULL;
+ default_sock = 1; /* Try both UIDs. */
}
if (default_sock)
{
- socket_name = alloca (100 + strlen (server_name));
- sprintf (socket_name, "/tmp/emacs%d/%s",
- (int) geteuid (), server_name);
+ socket_name = alloca (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
{
- fprintf (stderr, "%s: socket-name %s too long",
- progname, socket_name);
- exit (EXIT_FAILURE);
+ message (TRUE, "%s: socket-name %s too long",
+ progname, socket_name);
+ fail ();
}
/* See if the socket exists, and if it's owned by us. */
strcpy (server.sun_path, socket_name);
else
{
- fprintf (stderr, "%s: socket-name %s too long",
+ message (TRUE, "%s: socket-name %s too long",
progname, socket_name);
exit (EXIT_FAILURE);
}
sock_status = socket_status (server.sun_path);
- saved_errno = errno;
+ 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 ())
- {
- fprintf (stderr, "%s: Invalid socket owner\n", progname);
+ /* There's a socket, but it isn't owned by us. This is OK if
+ we are root. */
+ if (0 != geteuid ())
+ {
+ message (TRUE, "%s: Invalid socket owner\n", progname);
return INVALID_SOCKET;
- }
- break;
+ }
+ break;
case 2:
- /* `stat' failed */
- if (saved_errno == ENOENT)
- fprintf (stderr,
- "%s: can't find socket; have you started the server?\n\
+ /* `stat' failed */
+ if (saved_errno == ENOENT)
+ message (TRUE,
+ "%s: can't find socket; have you started the server?\n\
To start the server in Emacs, type \"M-x server-start\".\n",
progname);
- else
- fprintf (stderr, "%s: can't stat %s: %s\n",
+ else
+ message (TRUE, "%s: can't stat %s: %s\n",
progname, server.sun_path, strerror (saved_errno));
- return INVALID_SOCKET;
+ return INVALID_SOCKET;
}
}
if (connect (s, (struct sockaddr *) &server, strlen (server.sun_path) + 2)
< 0)
{
- fprintf (stderr, "%s: ", progname);
- perror ("connect");
+ message (TRUE, "%s: connect: %s\n", progname, strerror (errno));
return INVALID_SOCKET;
}
{
s = set_local_socket ();
if ((s != INVALID_SOCKET) || alternate_editor)
- return s;
-
- fprintf (stderr, "%s: error accessing socket \"%s\"",
- progname, socket_name);
+ return s;
+ message (TRUE, "%s: error accessing socket \"%s\"",
+ progname, socket_name);
exit (EXIT_FAILURE);
}
#endif
{
s = set_tcp_socket ();
if ((s != INVALID_SOCKET) || alternate_editor)
- return s;
+ return s;
- fprintf (stderr, "%s: error accessing server file \"%s\"",
- progname, server_file);
+ message (TRUE, "%s: error accessing server file \"%s\"",
+ progname, server_file);
exit (EXIT_FAILURE);
}
return s;
/* No implicit or explicit socket, and no alternate editor. */
- fprintf (stderr, "%s: No socket or alternate editor. Please use:\n\n"
+ message (TRUE, "%s: No socket or alternate editor. Please use:\n\n"
#ifndef NO_SOCKETS_IN_FILE_SYSTEM
"\t--socket-name\n"
#endif
exit (EXIT_FAILURE);
}
+#ifdef WINDOWSNT
+FARPROC set_fg; /* Pointer to AllowSetForegroundWindow. */
+FARPROC get_wc; /* Pointer to RealGetWindowClassA. */
+
+BOOL CALLBACK
+w32_find_emacs_process (hWnd, lParam)
+ HWND hWnd;
+ LPARAM lParam;
+{
+ DWORD pid;
+ char class[6];
+
+ /* Reject any window not of class "Emacs". */
+ if (! get_wc (hWnd, class, sizeof (class))
+ || strcmp (class, "Emacs"))
+ return TRUE;
+
+ /* We only need the process id, not the thread id. */
+ (void) GetWindowThreadProcessId (hWnd, &pid);
+
+ /* Not the one we're looking for. */
+ if (pid != (DWORD) emacs_pid) return TRUE;
+
+ /* OK, let's raise it. */
+ set_fg (emacs_pid);
+
+ /* Stop enumeration. */
+ return FALSE;
+}
+
+/*
+ * Search for a window of class "Emacs" and owned by a process with
+ * process id = emacs_pid. If found, allow it to grab the focus.
+ */
+void
+w32_give_focus ()
+{
+ HMODULE hUser32;
+
+ /* It shouldn't happen when dealing with TCP sockets. */
+ if (!emacs_pid) return;
+
+ if (!(hUser32 = LoadLibrary ("user32.dll"))) return;
+
+ /* Modern Windows restrict which processes can set the foreground window.
+ emacsclient can allow Emacs to grab the focus by calling the function
+ AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and
+ NT) lack this function, so we have to check its availability. */
+ if ((set_fg = GetProcAddress (hUser32, "AllowSetForegroundWindow"))
+ && (get_wc = GetProcAddress (hUser32, "RealGetWindowClassA")))
+ EnumWindows (w32_find_emacs_process, (LPARAM) 0);
+
+ FreeLibrary (hUser32);
+}
+#endif
+
int
main (argc, argv)
int argc;
char **argv;
{
- HSOCKET s;
int i, rl, needlf = 0;
- char *cwd;
+ char *cwd, *str;
char string[BUFSIZ+1];
+ main_argc = argc;
+ main_argv = argv;
progname = argv[0];
/* Process options. */
decode_options (argc, argv);
- if ((argc - optind < 1) && !eval)
+ if ((argc - optind < 1) && !eval && !tty && !window_system)
{
- fprintf (stderr, "%s: file name or argument required\n", progname);
- fprintf (stderr, "Try `%s --help' for more information\n", progname);
+ message (TRUE, "%s: file name or argument required\n"
+ "Try `%s --help' for more information\n",
+ progname, progname);
exit (EXIT_FAILURE);
}
- if ((s = set_socket ()) == INVALID_SOCKET)
- fail (argc, argv);
+ if ((emacs_socket = set_socket ()) == INVALID_SOCKET)
+ fail ();
-#ifdef HAVE_GETCWD
- cwd = getcwd (string, sizeof string);
-#else
- cwd = getwd (string);
-#endif
+
+ cwd = get_current_dir_name ();
if (cwd == 0)
{
/* getwd puts message in STRING if it fails. */
-#ifdef HAVE_GETCWD
- fprintf (stderr, "%s: %s (%s)\n", progname,
- "Cannot get current working directory", strerror (errno));
-#else
- fprintf (stderr, "%s: %s (%s)\n", progname, string, strerror (errno));
+ message (TRUE, "%s: %s\n", progname,
+ "Cannot get current working directory");
+ fail ();
+ }
+
+#ifdef WINDOWSNT
+ w32_give_focus ();
#endif
- fail (argc, argv);
+
+ /* First of all, send our version number for verification. */
+ send_to_emacs (emacs_socket, "-version ");
+ send_to_emacs (emacs_socket, VERSION);
+ send_to_emacs (emacs_socket, " ");
+
+ /* Send over our environment. */
+ if (!current_frame)
+ {
+ extern char **environ;
+ int i;
+ for (i = 0; environ[i]; i++)
+ {
+ char *name = xstrdup (environ[i]);
+ char *value = strchr (name, '=');
+ send_to_emacs (emacs_socket, "-env ");
+ quote_argument (emacs_socket, environ[i]);
+ send_to_emacs (emacs_socket, " ");
+ }
}
+ /* Send over our current directory. */
+ if (!current_frame)
+ {
+ send_to_emacs (emacs_socket, "-dir ");
+ quote_argument (emacs_socket, cwd);
+ send_to_emacs (emacs_socket, "/");
+ send_to_emacs (emacs_socket, " ");
+ }
+
+ retry:
if (nowait)
- SEND_STRING ("-nowait ");
+ send_to_emacs (emacs_socket, "-nowait ");
- if (eval)
- SEND_STRING ("-eval ");
+ if (current_frame)
+ send_to_emacs (emacs_socket, "-current-frame ");
if (display)
{
- SEND_STRING ("-display ");
- SEND_QUOTED (display);
- SEND_STRING (" ");
+ send_to_emacs (emacs_socket, "-display ");
+ quote_argument (emacs_socket, display);
+ send_to_emacs (emacs_socket, " ");
}
+ if (tty)
+ {
+ char *type = getenv ("TERM");
+ char *tty_name = NULL;
+#ifndef WINDOWSNT
+ tty_name = ttyname (fileno (stdin));
+#endif
+
+ if (! tty_name)
+ {
+ message (TRUE, "%s: could not get terminal name\n", progname);
+ fail ();
+ }
+
+ if (! type)
+ {
+ message (TRUE, "%s: please set the TERM variable to your terminal type\n",
+ progname);
+ fail ();
+ }
+
+ if (! strcmp (type, "eterm"))
+ {
+ /* This causes nasty, MULTI_KBOARD-related input lockouts. */
+ message (TRUE, "%s: opening a frame in an Emacs term buffer"
+ " is not supported\n", progname);
+ fail ();
+ }
+#if !defined (NO_SOCKETS_IN_FILE_SYSTEM)
+ init_signals ();
+#endif
+
+ send_to_emacs (emacs_socket, "-tty ");
+ quote_argument (emacs_socket, tty_name);
+ send_to_emacs (emacs_socket, " ");
+ quote_argument (emacs_socket, type);
+ send_to_emacs (emacs_socket, " ");
+ }
+
+ if (window_system)
+ send_to_emacs (emacs_socket, "-window-system ");
+
if ((argc - optind > 0))
{
for (i = optind; i < argc; i++)
{
+ int relative = 0;
+
if (eval)
- ; /* Don't prepend any cwd or anything like that. */
- else if (*argv[i] == '+')
- {
+ {
+ /* Don't prepend cwd or anything like that. */
+ send_to_emacs (emacs_socket, "-eval ");
+ quote_argument (emacs_socket, argv[i]);
+ send_to_emacs (emacs_socket, " ");
+ continue;
+ }
+
+ if (*argv[i] == '+')
+ {
char *p = argv[i] + 1;
while (isdigit ((unsigned char) *p) || *p == ':') p++;
- if (*p != 0)
- {
- SEND_QUOTED (cwd);
- SEND_STRING ("/");
- }
- }
+ if (*p == 0)
+ {
+ send_to_emacs (emacs_socket, "-position ");
+ quote_argument (emacs_socket, argv[i]);
+ send_to_emacs (emacs_socket, " ");
+ continue;
+ }
+ else
+ relative = 1;
+ }
else if (! file_name_absolute_p (argv[i]))
- {
- SEND_QUOTED (cwd);
- SEND_STRING ("/");
- }
-
- SEND_QUOTED (argv[i]);
- SEND_STRING (" ");
- }
+ relative = 1;
+
+ send_to_emacs (emacs_socket, "-file ");
+ if (relative)
+ {
+ quote_argument (emacs_socket, cwd);
+ send_to_emacs (emacs_socket, "/");
+ }
+ quote_argument (emacs_socket, argv[i]);
+ send_to_emacs (emacs_socket, " ");
+ }
}
else
{
- while (fgets (string, BUFSIZ, stdin))
- {
- SEND_QUOTED (string);
- }
- SEND_STRING (" ");
+ if (!tty && !window_system)
+ {
+ while ((str = fgets (string, BUFSIZ, stdin)))
+ {
+ if (eval)
+ send_to_emacs (emacs_socket, "-eval ");
+ else
+ send_to_emacs (emacs_socket, "-file ");
+ quote_argument (emacs_socket, str);
+ }
+ send_to_emacs (emacs_socket, " ");
+ }
}
- SEND_STRING ("\n");
+ send_to_emacs (emacs_socket, "\n");
+
+ /* Wait for an answer. */
+ if (!eval && !tty && !nowait)
+ {
+ printf ("Waiting for Emacs...");
+ needlf = 2;
+ }
+ fflush (stdout);
+ fsync (1);
- /* Maybe wait for an answer. */
- if (!nowait)
+ /* Now, wait for an answer and print any messages. */
+ while ((rl = recv (emacs_socket, string, BUFSIZ, 0)) > 0)
{
- if (!eval)
+ char *p;
+ string[rl] = '\0';
+
+ p = string + strlen (string) - 1;
+ while (p > string && *p == '\n')
+ *p-- = 0;
+
+ if (strprefix ("-good-version ", string))
{
- printf ("Waiting for Emacs...");
- needlf = 2;
+ /* -good-version: The versions match. */
}
- fflush (stdout);
-
- /* Now, wait for an answer and print any messages. */
- while ((rl = recv (s, string, BUFSIZ, 0)) > 0)
+ else if (strprefix ("-emacs-pid ", string))
+ {
+ /* -emacs-pid PID: The process id of the Emacs process. */
+ emacs_pid = strtol (string + strlen ("-emacs-pid"), NULL, 10);
+ }
+ else if (strprefix ("-window-system-unsupported ", string))
+ {
+ /* -window-system-unsupported: Emacs was compiled without X
+ support. Try again on the terminal. */
+ window_system = 0;
+ nowait = 0;
+ tty = 1;
+ goto retry;
+ }
+ else if (strprefix ("-print ", string))
{
- string[rl] = '\0';
- if (needlf == 2)
+ /* -print STRING: Print STRING on the terminal. */
+ str = unquote_argument (string + strlen ("-print "));
+ if (needlf)
printf ("\n");
- printf ("%s", string);
- needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n';
+ printf ("%s", str);
+ needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n';
+ }
+ else if (strprefix ("-error ", string))
+ {
+ /* -error DESCRIPTION: Signal an error on the terminal. */
+ str = unquote_argument (string + strlen ("-error "));
+ if (needlf)
+ printf ("\n");
+ fprintf (stderr, "*ERROR*: %s", str);
+ needlf = str[0] == '\0' ? needlf : str[strlen (str) - 1] != '\n';
+ }
+#ifndef WINDOWSNT
+ else if (strprefix ("-suspend ", string))
+ {
+ /* -suspend: Suspend this terminal, i.e., stop the process. */
+ if (needlf)
+ printf ("\n");
+ needlf = 0;
+ kill (0, SIGSTOP);
+ }
+#endif
+ else
+ {
+ /* Unknown command. */
+ if (needlf)
+ printf ("\n");
+ printf ("*ERROR*: Unknown message: %s", string);
+ needlf = string[0] == '\0' ? needlf : string[strlen (string) - 1] != '\n';
}
-
- if (needlf)
- printf ("\n");
- fflush (stdout);
}
- CLOSE_SOCKET (s);
+ if (needlf)
+ printf ("\n");
+ fflush (stdout);
+ fsync (1);
+
+ CLOSE_SOCKET (emacs_socket);
return EXIT_SUCCESS;
}
#endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
+\f
#ifndef HAVE_STRERROR
char *
strerror (errnum)