1 /* Client process that communicates with GNU Emacs acting as server.
2 Copyright (C) 1986, 1987, 1994, 1999, 2000, 2001, 2002, 2003, 2004,
3 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA. */
31 /* config.h defines these, which disables sockets altogether! */
38 # include <commctrl.h>
40 # define NO_SOCKETS_IN_FILE_SYSTEM
42 # define HSOCKET SOCKET
43 # define CLOSE_SOCKET closesocket
44 # define INITIALIZE() (initialize_sockets ())
46 #else /* !WINDOWSNT */
48 # include <sys/types.h>
50 # ifdef HAVE_INET_SOCKETS
51 # include <netinet/in.h>
54 # define INVALID_SOCKET -1
56 # define CLOSE_SOCKET close
59 #endif /* !WINDOWSNT */
76 #else /* not WINDOWSNT */
78 #endif /* not WINDOWSNT */
86 char *getenv (), *getwd ();
91 #define egetenv(VAR) w32_getenv(VAR)
93 #define egetenv(VAR) getenv(VAR)
97 #define VERSION "unspecified"
102 #define EXIT_SUCCESS 0
106 #define EXIT_FAILURE 1
121 /* Name used to invoke this program. */
124 /* The second argument to main. */
127 /* Nonzero means don't wait for a response from Emacs. --no-wait. */
130 /* Nonzero means args are expressions to be evaluated. --eval. */
133 /* Nonzero means don't open a new frame. Inverse of --create-frame. */
134 int current_frame
= 1;
136 /* Nonzero means open a new graphical frame. */
137 int window_system
= 0;
139 /* The display on which Emacs should work. --display. */
140 char *display
= NULL
;
142 /* Nonzero means open a new Emacs frame on the current terminal. */
145 /* If non-NULL, the name of an editor to fallback to if the server
146 is not running. --alternate-editor. */
147 const char *alternate_editor
= NULL
;
149 /* If non-NULL, the filename of the UNIX socket. */
150 char *socket_name
= NULL
;
152 /* If non-NULL, the filename of the authentication file. */
153 char *server_file
= NULL
;
155 /* PID of the Emacs server process. */
158 void print_help_and_exit () NO_RETURN
;
160 struct option longopts
[] =
162 { "no-wait", no_argument
, NULL
, 'n' },
163 { "eval", no_argument
, NULL
, 'e' },
164 { "help", no_argument
, NULL
, 'H' },
165 { "version", no_argument
, NULL
, 'V' },
166 { "tty", no_argument
, NULL
, 't' },
167 { "create-frame", no_argument
, NULL
, 'c' },
168 { "alternate-editor", required_argument
, NULL
, 'a' },
169 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
170 { "socket-name", required_argument
, NULL
, 's' },
172 { "server-file", required_argument
, NULL
, 'f' },
174 { "display", required_argument
, NULL
, 'd' },
180 /* Like malloc but get fatal error if memory is exhausted. */
186 long *result
= (long *) malloc (size
);
195 /* Like strdup but get a fatal error if memory is exhausted. */
198 xstrdup (const char *s
)
200 char *result
= strdup (s
);
210 #if !defined (HAVE_GET_CURRENT_DIR_NAME) || defined (BROKEN_GET_CURRENT_DIR_NAME)
213 #ifndef DIRECTORY_SEP
214 #define DIRECTORY_SEP '/'
216 #ifndef IS_DIRECTORY_SEP
217 #define IS_DIRECTORY_SEP(_c_) ((_c_) == DIRECTORY_SEP)
219 #ifndef IS_DEVICE_SEP
221 #define IS_DEVICE_SEP(_c_) 0
223 #define IS_DEVICE_SEP(_c_) ((_c_) == DEVICE_SEP)
227 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_))
231 /* Return the current working directory. Returns NULL on errors.
232 Any other returned value must be freed with free. This is used
233 only when get_current_dir_name is not defined on the system. */
235 get_current_dir_name ()
239 struct stat dotstat
, pwdstat
;
240 /* If PWD is accurate, use it instead of calling getwd. PWD is
241 sometimes a nicer name, and using it may avoid a fatal error if a
242 parent directory is searchable but not readable. */
243 if ((pwd
= egetenv ("PWD")) != 0
244 && (IS_DIRECTORY_SEP (*pwd
) || (*pwd
&& IS_DEVICE_SEP (pwd
[1])))
245 && stat (pwd
, &pwdstat
) == 0
246 && stat (".", &dotstat
) == 0
247 && dotstat
.st_ino
== pwdstat
.st_ino
248 && dotstat
.st_dev
== pwdstat
.st_dev
250 && strlen (pwd
) < MAXPATHLEN
254 buf
= (char *) xmalloc (strlen (pwd
) + 1);
262 size_t buf_size
= 1024;
263 buf
= (char *) xmalloc (buf_size
);
268 if (getcwd (buf
, buf_size
) == buf
)
272 int tmp_errno
= errno
;
278 buf
= (char *) realloc (buf
, buf_size
);
286 /* We need MAXPATHLEN here. */
287 buf
= (char *) xmalloc (MAXPATHLEN
+ 1);
290 if (getwd (buf
) == NULL
)
292 int tmp_errno
= errno
;
305 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
307 /* Retrieve an environment variable from the Emacs subkeys of the registry.
308 Return NULL if the variable was not found, or it was empty.
309 This code is based on w32_get_resource (w32.c). */
311 w32_get_resource (predefined
, key
, type
)
316 HKEY hrootkey
= NULL
;
320 if (RegOpenKeyEx (predefined
, REG_ROOT
, 0, KEY_READ
, &hrootkey
) == ERROR_SUCCESS
)
322 if (RegQueryValueEx (hrootkey
, key
, NULL
, NULL
, NULL
, &cbData
) == ERROR_SUCCESS
)
324 result
= (char *) xmalloc (cbData
);
326 if ((RegQueryValueEx (hrootkey
, key
, NULL
, type
, result
, &cbData
) != ERROR_SUCCESS
) ||
334 RegCloseKey (hrootkey
);
341 getenv wrapper for Windows
343 This is needed to duplicate Emacs's behavior, which is to look for enviroment
344 variables in the registry if they don't appear in the environment.
353 if (value
= getenv (envvar
))
354 /* Found in the environment. */
357 if (! (value
= w32_get_resource (HKEY_CURRENT_USER
, envvar
, &dwType
)) &&
358 ! (value
= w32_get_resource (HKEY_LOCAL_MACHINE
, envvar
, &dwType
)))
359 /* Not found in the registry. */
362 if (dwType
== REG_SZ
)
363 /* Registry; no need to expand. */
366 if (dwType
== REG_EXPAND_SZ
)
370 if (size
= ExpandEnvironmentStrings (value
, NULL
, 0))
372 char *buffer
= (char *) xmalloc (size
);
373 if (ExpandEnvironmentStrings (value
, buffer
, size
))
375 /* Found and expanded. */
380 /* Error expanding. */
385 /* Not the right type, or not correctly expanded. */
393 static int window_app
= -1;
394 char szTitle
[MAX_PATH
];
398 /* Checking for STDOUT does not work; it's a valid handle also in
399 nonconsole apps. Testing for the console title seems to work. */
400 window_app
= (GetConsoleTitleA (szTitle
, MAX_PATH
) == 0);
402 InitCommonControls();
409 execvp wrapper for Windows. Quotes arguments with embedded spaces.
411 This is necessary due to the broken implementation of exec* routines in
412 the Microsoft libraries: they concatenate the arguments together without
413 quoting special characters, and pass the result to CreateProcess, with
414 predictably bad results. By contrast, Posix execvp passes the arguments
415 directly into the argv array of the child process.
418 w32_execvp (path
, argv
)
424 /* Required to allow a .BAT script as alternate editor. */
425 argv
[0] = (char *) alternate_editor
;
427 for (i
= 0; argv
[i
]; i
++)
428 if (strchr (argv
[i
], ' '))
430 char *quoted
= alloca (strlen (argv
[i
]) + 3);
431 sprintf (quoted
, "\"%s\"", argv
[i
]);
435 return execvp (path
, argv
);
439 #define execvp w32_execvp
441 #endif /* WINDOWSNT */
443 /* Display a normal or error message.
444 On Windows, use a message box if compiled as a Windows app. */
446 message (int is_error
, char *message
, ...)
451 va_start (args
, message
);
452 vsprintf (msg
, message
, args
);
456 if (w32_window_app ())
459 MessageBox (NULL
, msg
, "Emacsclient ERROR", MB_ICONERROR
);
461 MessageBox (NULL
, msg
, "Emacsclient", MB_ICONINFORMATION
);
466 FILE *f
= is_error
? stderr
: stdout
;
473 /* Decode the options from argv and argc.
474 The global variable `optind' will say how many arguments we used up. */
477 decode_options (argc
, argv
)
481 alternate_editor
= egetenv ("ALTERNATE_EDITOR");
485 int opt
= getopt_long (argc
, argv
,
486 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
499 /* If getopt returns 0, then it has already processed a
500 long-named option. We should do nothing. */
504 alternate_editor
= optarg
;
507 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
509 socket_name
= optarg
;
514 server_file
= optarg
;
517 /* We used to disallow this argument in w32, but it seems better
518 to allow it, for the occasional case where the user is
519 connecting with a w32 client to a server compiled with X11
521 #if 1 /* !defined WINDOWS */
536 message (FALSE
, "emacsclient %s\n", VERSION
);
550 print_help_and_exit ();
554 message (TRUE
, "Try `%s --help' for more information\n", progname
);
560 /* We used to set `display' to $DISPLAY by default, but this changed the
561 default behavior and is sometimes inconvenient. So instead of forcing
562 users to say "--display ''" when they want to use Emacs's existing tty
563 or display connection, we force them to use "--display $DISPLAY" if
564 they want Emacs to connect to their current display.
565 -c still implicitly passes --display $DISPLAY unless -t was specified
566 so as to try and mimick the behavior of `emacs' which either uses
567 the current tty or the current $DISPLAY. */
568 if (!current_frame
&& !tty
&& !display
)
569 display
= egetenv ("DISPLAY");
571 if (display
&& strlen (display
) == 0)
576 #if !defined (WINDOWSNT) && !defined (HAVE_CARBON)
577 else if (!current_frame
)
581 /* --no-wait implies --current-frame on ttys when there are file
582 arguments or expressions given. */
583 if (nowait
&& tty
&& argc
- optind
> 0)
598 print_help_and_exit ()
600 /* Spaces and tabs are significant in this message; they're chosen so the
601 message aligns properly both in a tty and in a Windows message box.
602 Please try to preserve them; otherwise the output is very hard to read
603 when using emacsclientw. */
605 "Usage: %s [OPTIONS] FILE...\n\
606 Tell the Emacs server to visit the specified files.\n\
607 Every FILE can be either just a FILENAME or [+LINE[:COLUMN]] FILENAME.\n\
609 The following OPTIONS are accepted:\n\
610 -V, --version Just print version info and return\n\
611 -H, --help Print this usage information message\n\
612 -t, --tty Open a new Emacs frame on the current terminal\n\
613 -c, --create-frame Create a new frame instead of trying to\n\
614 use the current Emacs frame\n\
615 -e, --eval Evaluate the FILE arguments as ELisp expressions\n\
616 -n, --no-wait Don't wait for the server to return\n\
617 -d, --display=DISPLAY Visit the file in the given display\n"
618 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
619 "-s, --socket-name=FILENAME\n\
620 Set filename of the UNIX socket for communication\n"
622 "-f, --server-file=FILENAME\n\
623 Set filename of the TCP authentication file\n\
624 -a, --alternate-editor=EDITOR\n\
625 Editor to fallback to if the server is not running\n\
627 Report bugs to bug-gnu-emacs@gnu.org.\n", progname
);
632 Try to run a different command, or --if no alternate editor is
633 defined-- exit with an errorcode.
634 Uses argv, but gets it from the global variable main_argv.
639 if (alternate_editor
)
643 execvp (alternate_editor
, main_argv
+ i
);
644 message (TRUE
, "%s: error executing alternate editor \"%s\"\n",
645 progname
, alternate_editor
);
651 #if !defined (HAVE_SOCKETS) || !defined (HAVE_INET_SOCKETS)
660 message (TRUE
, "%s: Sorry, the Emacs server is supported only\n"
661 "on systems with Berkeley sockets.\n",
666 #else /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
669 # include <winsock2.h>
671 # include <sys/types.h>
672 # include <sys/socket.h>
676 #define AUTH_KEY_LENGTH 64
677 #define SEND_BUFFER_SIZE 4096
679 extern char *strerror ();
682 /* Buffer to accumulate data to send in TCP connections. */
683 char send_buffer
[SEND_BUFFER_SIZE
+ 1];
684 int sblen
= 0; /* Fill pointer for the send buffer. */
685 /* Socket used to communicate with the Emacs server process. */
686 HSOCKET emacs_socket
= 0;
688 /* On Windows, the socket library was historically separate from the standard
689 C library, so errors are handled differently. */
691 sock_err_message (function_name
)
697 FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM
698 | FORMAT_MESSAGE_ALLOCATE_BUFFER
699 | FORMAT_MESSAGE_ARGUMENT_ARRAY
,
700 NULL
, WSAGetLastError (), 0, (LPTSTR
)&msg
, 0, NULL
);
702 message (TRUE
, "%s: %s: %s\n", progname
, function_name
, msg
);
706 message (TRUE
, "%s: %s: %s\n", progname
, function_name
, strerror (errno
));
711 /* Let's send the data to Emacs when either
712 - the data ends in "\n", or
713 - the buffer is full (but this shouldn't happen)
714 Otherwise, we just accumulate it. */
716 send_to_emacs (s
, data
)
722 int dlen
= strlen (data
);
723 if (dlen
+ sblen
>= SEND_BUFFER_SIZE
)
725 int part
= SEND_BUFFER_SIZE
- sblen
;
726 strncpy (&send_buffer
[sblen
], data
, part
);
728 sblen
= SEND_BUFFER_SIZE
;
732 strcpy (&send_buffer
[sblen
], data
);
739 if (sblen
== SEND_BUFFER_SIZE
740 || (sblen
> 0 && send_buffer
[sblen
-1] == '\n'))
742 int sent
= send (s
, send_buffer
, sblen
, 0);
744 strcpy (send_buffer
, &send_buffer
[sent
]);
751 /* In STR, insert a & before each &, each space, each newline, and
752 any initial -. Change spaces to underscores, too, so that the
753 return value never contains a space.
755 Does not change the string. Outputs the result to STREAM. */
757 quote_argument (s
, str
)
761 char *copy
= (char *) xmalloc (strlen (str
) * 2 + 1);
782 if (*p
== '&' || (*p
== '-' && p
== str
))
789 send_to_emacs (s
, copy
);
795 /* The inverse of quote_argument. Removes quoting in string STR by
796 modifying the string in place. Returns STR. */
799 unquote_argument (str
)
831 file_name_absolute_p (filename
)
832 const unsigned char *filename
;
834 /* Sanity check, it shouldn't happen. */
835 if (! filename
) return FALSE
;
837 /* /xxx is always an absolute path. */
838 if (filename
[0] == '/') return TRUE
;
840 /* Empty filenames (which shouldn't happen) are relative. */
841 if (filename
[0] == '\0') return FALSE
;
844 /* X:\xxx is always absolute. */
845 if (isalpha (filename
[0])
846 && filename
[1] == ':' && (filename
[2] == '\\' || filename
[2] == '/'))
849 /* Both \xxx and \\xxx\yyy are absolute. */
850 if (filename
[0] == '\\') return TRUE
;
857 /* Wrapper to make WSACleanup a cdecl, as required by atexit. */
859 __cdecl
close_winsock ()
864 /* Initialize the WinSock2 library. */
866 initialize_sockets ()
870 if (WSAStartup (MAKEWORD (2, 0), &wsaData
))
872 message (TRUE
, "%s: error initializing WinSock2\n", progname
);
876 atexit (close_winsock
);
878 #endif /* WINDOWSNT */
882 * Read the information needed to set up a TCP comm channel with
883 * the Emacs server: host, port, pid and authentication string.
886 get_server_config (server
, authentication
)
887 struct sockaddr_in
*server
;
888 char *authentication
;
895 if (file_name_absolute_p (server_file
))
896 config
= fopen (server_file
, "rb");
899 char *home
= egetenv ("HOME");
903 char *path
= alloca (32 + strlen (home
) + strlen (server_file
));
904 sprintf (path
, "%s/.emacs.d/server/%s", home
, server_file
);
905 config
= fopen (path
, "rb");
908 if (!config
&& (home
= egetenv ("APPDATA")))
910 char *path
= alloca (32 + strlen (home
) + strlen (server_file
));
911 sprintf (path
, "%s/.emacs.d/server/%s", home
, server_file
);
912 config
= fopen (path
, "rb");
920 if (fgets (dotted
, sizeof dotted
, config
)
921 && (port
= strchr (dotted
, ':'))
922 && (pid
= strchr (port
, ' ')))
929 message (TRUE
, "%s: invalid configuration info\n", progname
);
933 server
->sin_family
= AF_INET
;
934 server
->sin_addr
.s_addr
= inet_addr (dotted
);
935 server
->sin_port
= htons (atoi (port
));
937 if (! fread (authentication
, AUTH_KEY_LENGTH
, 1, config
))
939 message (TRUE
, "%s: cannot read authentication info\n", progname
);
945 emacs_pid
= atoi (pid
);
954 struct sockaddr_in server
;
955 struct linger l_arg
= {1, 1};
956 char auth_string
[AUTH_KEY_LENGTH
+ 1];
958 if (! get_server_config (&server
, auth_string
))
959 return INVALID_SOCKET
;
961 if (server
.sin_addr
.s_addr
!= inet_addr ("127.0.0.1"))
962 message (FALSE
, "%s: connected to remote socket at %s\n",
963 progname
, inet_ntoa (server
.sin_addr
));
966 * Open up an AF_INET socket
968 if ((s
= socket (AF_INET
, SOCK_STREAM
, IPPROTO_TCP
)) < 0)
970 sock_err_message ("socket");
971 return INVALID_SOCKET
;
977 if (connect (s
, (struct sockaddr
*) &server
, sizeof server
) < 0)
979 sock_err_message ("connect");
980 return INVALID_SOCKET
;
983 setsockopt (s
, SOL_SOCKET
, SO_LINGER
, (char *) &l_arg
, sizeof l_arg
);
986 * Send the authentication
988 auth_string
[AUTH_KEY_LENGTH
] = '\0';
990 send_to_emacs (s
, "-auth ");
991 send_to_emacs (s
, auth_string
);
992 send_to_emacs (s
, " ");
998 /* Returns 1 if PREFIX is a prefix of STRING. */
1000 strprefix (char *prefix
, char *string
)
1002 return !strncmp (prefix
, string
, strlen (prefix
));
1006 #if !defined (NO_SOCKETS_IN_FILE_SYSTEM)
1008 /* Three possibilities:
1009 2 - can't be `stat'ed (sets errno)
1010 1 - isn't owned by us
1011 0 - success: none of the above */
1014 socket_status (socket_name
)
1017 struct stat statbfr
;
1019 if (stat (socket_name
, &statbfr
) == -1)
1022 if (statbfr
.st_uid
!= geteuid ())
1029 /* A signal handler that passes the signal to the Emacs process.
1030 Useful for SIGWINCH. */
1033 pass_signal_to_emacs (int signalnum
)
1035 int old_errno
= errno
;
1038 kill (emacs_pid
, signalnum
);
1040 signal (signalnum
, pass_signal_to_emacs
);
1044 /* Signal handler for SIGCONT; notify the Emacs process that it can
1045 now resume our tty frame. */
1048 handle_sigcont (int signalnum
)
1050 int old_errno
= errno
;
1052 if (tcgetpgrp (1) == getpgrp ())
1054 /* We are in the foreground. */
1055 send_to_emacs (emacs_socket
, "-resume \n");
1059 /* We are in the background; cancel the continue. */
1060 kill (getpid (), SIGSTOP
);
1063 signal (signalnum
, handle_sigcont
);
1067 /* Signal handler for SIGTSTP; notify the Emacs process that we are
1068 going to sleep. Normally the suspend is initiated by Emacs via
1069 server-handle-suspend-tty, but if the server gets out of sync with
1070 reality, we may get a SIGTSTP on C-z. Handling this signal and
1071 notifying Emacs about it should get things under control again. */
1074 handle_sigtstp (int signalnum
)
1076 int old_errno
= errno
;
1080 send_to_emacs (emacs_socket
, "-suspend \n");
1082 /* Unblock this signal and call the default handler by temporarily
1083 changing the handler and resignalling. */
1084 sigprocmask (SIG_BLOCK
, NULL
, &set
);
1085 sigdelset (&set
, signalnum
);
1086 signal (signalnum
, SIG_DFL
);
1087 kill (getpid (), signalnum
);
1088 sigprocmask (SIG_SETMASK
, &set
, NULL
); /* Let's the above signal through. */
1089 signal (signalnum
, handle_sigtstp
);
1093 /* Set up signal handlers before opening a frame on the current tty. */
1098 /* Set up signal handlers. */
1099 signal (SIGWINCH
, pass_signal_to_emacs
);
1101 /* Don't pass SIGINT and SIGQUIT to Emacs, because it has no way of
1102 deciding which terminal the signal came from. C-g is now a
1103 normal input event on secondary terminals. */
1105 signal (SIGINT
, pass_signal_to_emacs
);
1106 signal (SIGQUIT
, pass_signal_to_emacs
);
1109 signal (SIGCONT
, handle_sigcont
);
1110 signal (SIGTSTP
, handle_sigtstp
);
1111 signal (SIGTTOU
, handle_sigtstp
);
1119 struct sockaddr_un server
;
1122 * Open up an AF_UNIX socket in this person's home directory
1125 if ((s
= socket (AF_UNIX
, SOCK_STREAM
, 0)) < 0)
1127 message (TRUE
, "%s: socket: %s\n", progname
, strerror (errno
));
1128 return INVALID_SOCKET
;
1131 server
.sun_family
= AF_UNIX
;
1134 int sock_status
= 0;
1135 int default_sock
= !socket_name
;
1136 int saved_errno
= 0;
1137 char *server_name
= "server";
1139 if (socket_name
&& !index (socket_name
, '/') && !index (socket_name
, '\\'))
1140 { /* socket_name is a file name component. */
1141 server_name
= socket_name
;
1143 default_sock
= 1; /* Try both UIDs. */
1148 socket_name
= alloca (100 + strlen (server_name
));
1149 sprintf (socket_name
, "/tmp/emacs%d/%s",
1150 (int) geteuid (), server_name
);
1153 if (strlen (socket_name
) < sizeof (server
.sun_path
))
1154 strcpy (server
.sun_path
, socket_name
);
1157 message (TRUE
, "%s: socket-name %s too long\n",
1158 progname
, socket_name
);
1162 /* See if the socket exists, and if it's owned by us. */
1163 sock_status
= socket_status (server
.sun_path
);
1164 saved_errno
= errno
;
1165 if (sock_status
&& default_sock
)
1167 /* Failing that, see if LOGNAME or USER exist and differ from
1168 our euid. If so, look for a socket based on the UID
1169 associated with the name. This is reminiscent of the logic
1170 that init_editfns uses to set the global Vuser_full_name. */
1172 char *user_name
= (char *) egetenv ("LOGNAME");
1175 user_name
= (char *) egetenv ("USER");
1179 struct passwd
*pw
= getpwnam (user_name
);
1181 if (pw
&& (pw
->pw_uid
!= geteuid ()))
1183 /* We're running under su, apparently. */
1184 socket_name
= alloca (100 + strlen (server_name
));
1185 sprintf (socket_name
, "/tmp/emacs%d/%s",
1186 (int) pw
->pw_uid
, server_name
);
1188 if (strlen (socket_name
) < sizeof (server
.sun_path
))
1189 strcpy (server
.sun_path
, socket_name
);
1192 message (TRUE
, "%s: socket-name %s too long\n",
1193 progname
, socket_name
);
1194 exit (EXIT_FAILURE
);
1197 sock_status
= socket_status (server
.sun_path
);
1198 saved_errno
= errno
;
1201 errno
= saved_errno
;
1205 switch (sock_status
)
1208 /* There's a socket, but it isn't owned by us. This is OK if
1210 if (0 != geteuid ())
1212 message (TRUE
, "%s: Invalid socket owner\n", progname
);
1213 return INVALID_SOCKET
;
1219 if (saved_errno
== ENOENT
)
1221 "%s: can't find socket; have you started the server?\n\
1222 To start the server in Emacs, type \"M-x server-start\".\n",
1225 message (TRUE
, "%s: can't stat %s: %s\n",
1226 progname
, server
.sun_path
, strerror (saved_errno
));
1227 return INVALID_SOCKET
;
1231 if (connect (s
, (struct sockaddr
*) &server
, strlen (server
.sun_path
) + 2)
1234 message (TRUE
, "%s: connect: %s\n", progname
, strerror (errno
));
1235 return INVALID_SOCKET
;
1240 #endif /* ! NO_SOCKETS_IN_FILE_SYSTEM */
1249 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
1250 /* Explicit --socket-name argument. */
1253 s
= set_local_socket ();
1254 if ((s
!= INVALID_SOCKET
) || alternate_editor
)
1256 message (TRUE
, "%s: error accessing socket \"%s\"\n",
1257 progname
, socket_name
);
1258 exit (EXIT_FAILURE
);
1262 /* Explicit --server-file arg or EMACS_SERVER_FILE variable. */
1264 server_file
= egetenv ("EMACS_SERVER_FILE");
1268 s
= set_tcp_socket ();
1269 if ((s
!= INVALID_SOCKET
) || alternate_editor
)
1272 message (TRUE
, "%s: error accessing server file \"%s\"\n",
1273 progname
, server_file
);
1274 exit (EXIT_FAILURE
);
1277 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
1278 /* Implicit local socket. */
1279 s
= set_local_socket ();
1280 if (s
!= INVALID_SOCKET
)
1284 /* Implicit server file. */
1285 server_file
= "server";
1286 s
= set_tcp_socket ();
1287 if ((s
!= INVALID_SOCKET
) || alternate_editor
)
1290 /* No implicit or explicit socket, and no alternate editor. */
1291 message (TRUE
, "%s: No socket or alternate editor. Please use:\n\n"
1292 #ifndef NO_SOCKETS_IN_FILE_SYSTEM
1295 "\t--server-file (or environment variable EMACS_SERVER_FILE)\n\
1296 \t--alternate-editor (or environment variable ALTERNATE_EDITOR)\n",
1298 exit (EXIT_FAILURE
);
1302 FARPROC set_fg
; /* Pointer to AllowSetForegroundWindow. */
1303 FARPROC get_wc
; /* Pointer to RealGetWindowClassA. */
1306 w32_find_emacs_process (hWnd
, lParam
)
1313 /* Reject any window not of class "Emacs". */
1314 if (! get_wc (hWnd
, class, sizeof (class))
1315 || strcmp (class, "Emacs"))
1318 /* We only need the process id, not the thread id. */
1319 (void) GetWindowThreadProcessId (hWnd
, &pid
);
1321 /* Not the one we're looking for. */
1322 if (pid
!= (DWORD
) emacs_pid
) return TRUE
;
1324 /* OK, let's raise it. */
1327 /* Stop enumeration. */
1332 * Search for a window of class "Emacs" and owned by a process with
1333 * process id = emacs_pid. If found, allow it to grab the focus.
1340 /* It shouldn't happen when dealing with TCP sockets. */
1341 if (!emacs_pid
) return;
1343 if (!(hUser32
= LoadLibrary ("user32.dll"))) return;
1345 /* Modern Windows restrict which processes can set the foreground window.
1346 emacsclient can allow Emacs to grab the focus by calling the function
1347 AllowSetForegroundWindow. Unfortunately, older Windows (W95, W98 and
1348 NT) lack this function, so we have to check its availability. */
1349 if ((set_fg
= GetProcAddress (hUser32
, "AllowSetForegroundWindow"))
1350 && (get_wc
= GetProcAddress (hUser32
, "RealGetWindowClassA")))
1351 EnumWindows (w32_find_emacs_process
, (LPARAM
) 0);
1353 FreeLibrary (hUser32
);
1362 int i
, rl
, needlf
= 0;
1364 char string
[BUFSIZ
+1];
1369 /* Process options. */
1370 decode_options (argc
, argv
);
1372 if ((argc
- optind
< 1) && !eval
&& !tty
&& !window_system
)
1374 message (TRUE
, "%s: file name or argument required\n"
1375 "Try `%s --help' for more information\n",
1376 progname
, progname
);
1377 exit (EXIT_FAILURE
);
1380 if ((emacs_socket
= set_socket ()) == INVALID_SOCKET
)
1384 cwd
= get_current_dir_name ();
1387 /* getwd puts message in STRING if it fails. */
1388 message (TRUE
, "%s: %s\n", progname
,
1389 "Cannot get current working directory");
1397 /* Send over our environment. */
1400 extern char **environ
;
1402 for (i
= 0; environ
[i
]; i
++)
1404 char *name
= xstrdup (environ
[i
]);
1405 char *value
= strchr (name
, '=');
1406 send_to_emacs (emacs_socket
, "-env ");
1407 quote_argument (emacs_socket
, environ
[i
]);
1408 send_to_emacs (emacs_socket
, " ");
1412 /* Send over our current directory. */
1415 send_to_emacs (emacs_socket
, "-dir ");
1416 quote_argument (emacs_socket
, cwd
);
1417 send_to_emacs (emacs_socket
, "/");
1418 send_to_emacs (emacs_socket
, " ");
1423 send_to_emacs (emacs_socket
, "-nowait ");
1426 send_to_emacs (emacs_socket
, "-current-frame ");
1430 send_to_emacs (emacs_socket
, "-display ");
1431 quote_argument (emacs_socket
, display
);
1432 send_to_emacs (emacs_socket
, " ");
1437 char *type
= egetenv ("TERM");
1438 char *tty_name
= NULL
;
1440 tty_name
= ttyname (fileno (stdin
));
1445 message (TRUE
, "%s: could not get terminal name\n", progname
);
1451 message (TRUE
, "%s: please set the TERM variable to your terminal type\n",
1456 if (! strcmp (type
, "eterm"))
1458 /* This causes nasty, MULTI_KBOARD-related input lockouts. */
1459 message (TRUE
, "%s: opening a frame in an Emacs term buffer"
1460 " is not supported\n", progname
);
1463 #if !defined (NO_SOCKETS_IN_FILE_SYSTEM)
1467 send_to_emacs (emacs_socket
, "-tty ");
1468 quote_argument (emacs_socket
, tty_name
);
1469 send_to_emacs (emacs_socket
, " ");
1470 quote_argument (emacs_socket
, type
);
1471 send_to_emacs (emacs_socket
, " ");
1475 send_to_emacs (emacs_socket
, "-window-system ");
1477 if ((argc
- optind
> 0))
1479 for (i
= optind
; i
< argc
; i
++)
1485 /* Don't prepend cwd or anything like that. */
1486 send_to_emacs (emacs_socket
, "-eval ");
1487 quote_argument (emacs_socket
, argv
[i
]);
1488 send_to_emacs (emacs_socket
, " ");
1492 if (*argv
[i
] == '+')
1494 char *p
= argv
[i
] + 1;
1495 while (isdigit ((unsigned char) *p
) || *p
== ':') p
++;
1498 send_to_emacs (emacs_socket
, "-position ");
1499 quote_argument (emacs_socket
, argv
[i
]);
1500 send_to_emacs (emacs_socket
, " ");
1506 else if (! file_name_absolute_p (argv
[i
]))
1510 /* Call GetFullPathName so filenames of the form X:Y, where X is
1511 a valid drive designator, are interpreted as drive:path, not
1512 file:stream, and treated as absolute.
1513 The user can still pass a file:stream if desired (for example,
1514 .\X:Y, but it is not very useful, as Emacs currently does a
1515 very bad job of dealing wih NTFS streams. */
1517 char *filename
= (char *) xmalloc (MAX_PATH
);
1520 size
= GetFullPathName (argv
[i
], MAX_PATH
, filename
, NULL
);
1521 if (size
> 0 && size
< MAX_PATH
)
1531 send_to_emacs (emacs_socket
, "-file ");
1534 quote_argument (emacs_socket
, cwd
);
1535 send_to_emacs (emacs_socket
, "/");
1537 quote_argument (emacs_socket
, argv
[i
]);
1538 send_to_emacs (emacs_socket
, " ");
1543 if (!tty
&& !window_system
)
1545 while ((str
= fgets (string
, BUFSIZ
, stdin
)))
1548 send_to_emacs (emacs_socket
, "-eval ");
1550 send_to_emacs (emacs_socket
, "-file ");
1551 quote_argument (emacs_socket
, str
);
1553 send_to_emacs (emacs_socket
, " ");
1557 send_to_emacs (emacs_socket
, "\n");
1559 /* Wait for an answer. */
1560 if (!eval
&& !tty
&& !nowait
)
1562 printf ("Waiting for Emacs...");
1568 /* Now, wait for an answer and print any messages. */
1569 while ((rl
= recv (emacs_socket
, string
, BUFSIZ
, 0)) > 0)
1574 p
= string
+ strlen (string
) - 1;
1575 while (p
> string
&& *p
== '\n')
1578 if (strprefix ("-emacs-pid ", string
))
1580 /* -emacs-pid PID: The process id of the Emacs process. */
1581 emacs_pid
= strtol (string
+ strlen ("-emacs-pid"), NULL
, 10);
1583 else if (strprefix ("-window-system-unsupported ", string
))
1585 /* -window-system-unsupported: Emacs was compiled without X
1586 support. Try again on the terminal. */
1592 else if (strprefix ("-print ", string
))
1594 /* -print STRING: Print STRING on the terminal. */
1595 str
= unquote_argument (string
+ strlen ("-print "));
1599 needlf
= str
[0] == '\0' ? needlf
: str
[strlen (str
) - 1] != '\n';
1601 else if (strprefix ("-error ", string
))
1603 /* -error DESCRIPTION: Signal an error on the terminal. */
1604 str
= unquote_argument (string
+ strlen ("-error "));
1607 fprintf (stderr
, "*ERROR*: %s", str
);
1608 needlf
= str
[0] == '\0' ? needlf
: str
[strlen (str
) - 1] != '\n';
1611 else if (strprefix ("-suspend ", string
))
1613 /* -suspend: Suspend this terminal, i.e., stop the process. */
1622 /* Unknown command. */
1625 printf ("*ERROR*: Unknown message: %s", string
);
1626 needlf
= string
[0] == '\0' ? needlf
: string
[strlen (string
) - 1] != '\n';
1635 CLOSE_SOCKET (emacs_socket
);
1636 return EXIT_SUCCESS
;
1639 #endif /* HAVE_SOCKETS && HAVE_INET_SOCKETS */
1642 #ifndef HAVE_STRERROR
1647 extern char *sys_errlist
[];
1648 extern int sys_nerr
;
1650 if (errnum
>= 0 && errnum
< sys_nerr
)
1651 return sys_errlist
[errnum
];
1652 return (char *) "Unknown error";
1655 #endif /* ! HAVE_STRERROR */
1657 /* arch-tag: f39bb9c4-73eb-477e-896d-50832e2ca9a7
1658 (do not change this comment) */
1660 /* emacsclient.c ends here */