2 Client code to allow local and remote editing of files by XEmacs.
3 Copyright (C) 1989 Free Software Foundation, Inc.
4 Copyright (C) 1995 Sun Microsystems, Inc.
5 Copyright (C) 1997 Free Software Foundation, Inc.
7 This file is part of XEmacs.
9 XEmacs is free software; you can redistribute it and/or modify it
10 under the terms of the GNU General Public License as published by the
11 Free Software Foundation; either version 2, or (at your option) any
14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with XEmacs; see the file COPYING. If not, write to
21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA.
24 Author: Andy Norman (ange@hplb.hpl.hp.com), based on
25 'etc/emacsclient.c' from the GNU Emacs 18.52 distribution.
27 Please mail bugs and suggestions to the XEmacs maintainer.
31 * This file incorporates new features added by Bob Weiner <weiner@mot.com>,
32 * Darrell Kindred <dkindred@cmu.edu> and Arup Mukherjee <arup@cmu.edu>.
33 * GNUATTACH support added by Ben Wing <wing@xemacs.org>.
34 * Please see the note at the end of the README file for details.
36 * (If gnuserv came bundled with your emacs, the README file is probably
37 * ../etc/gnuserv.README relative to the directory containing this file)
41 /* Hand-munged RCS header */
42 static char rcsid [] = "!Header: gnuclient.c,v 2.2 95/12/12 01:39:21 wing nene !";
50 #include <sys/types.h>
54 #endif /* HAVE_STRING_H */
58 #endif /* HAVE_UNISTD_H */
62 #if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && \
63 !defined(INTERNET_DOMAIN_SOCKETS)
65 main (int argc, char *argv[])
67 fprintf (stderr, "Sorry, the Emacs server is only "
68 "supported on systems that have\n");
69 fprintf (stderr, "Unix Domain sockets, Internet Domain "
70 "sockets or System V IPC.\n");
73 #else /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
75 static char cwd[MAXPATHLEN+2]; /* current working directory when calculated */
76 static char *cp = NULL; /* ptr into valid bit of cwd above */
78 static pid_t emacs_pid; /* Process id for emacs process */
80 void initialize_signals (void);
83 tell_emacs_to_resume (int sig)
85 char buffer[GSERV_BUFSZ+1];
86 int s; /* socket / msqid to server */
87 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
90 /* Why is SYSV so retarded? */
91 /* We want emacs to realize that we are resuming */
92 signal(SIGCONT, tell_emacs_to_resume);
94 connect_type = make_connection (NULL, (u_short) 0, &s);
96 sprintf(buffer,"(gnuserv-eval '(resume-pid-console %d))", (int)getpid());
97 send_string(s, buffer);
100 if (connect_type == (int) CONN_IPC)
101 disconnect_from_ipc_server (s, msgp, FALSE);
102 #else /* !SYSV_IPC */
103 if (connect_type != (int) CONN_IPC)
104 disconnect_from_server (s, FALSE);
105 #endif /* !SYSV_IPC */
109 pass_signal_to_emacs (int sig)
111 if (kill (emacs_pid, sig) == -1)
113 fprintf (stderr, "gnuattach: Could not pass signal to emacs process\n");
116 initialize_signals ();
120 initialize_signals ()
122 /* Set up signal handler to pass relevant signals to emacs process.
123 We used to send SIGSEGV, SIGBUS, SIGPIPE, SIGILL and others to
124 Emacs, but I think it's better not to. I can see no reason why
125 Emacs should SIGSEGV whenever gnuclient SIGSEGV-s, etc. */
126 signal (SIGQUIT, pass_signal_to_emacs);
127 signal (SIGINT, pass_signal_to_emacs);
129 signal (SIGWINCH, pass_signal_to_emacs);
132 /* We want emacs to realize that we are resuming */
133 signal (SIGCONT, tell_emacs_to_resume);
138 get_current_working_directory -- return the cwd.
141 get_current_working_directory (void)
144 { /* haven't calculated it yet */
146 if (getwd (cwd) == 0)
148 if (getcwd (cwd,MAXPATHLEN) == NULL)
152 fprintf (stderr, "%s: unable to get current working directory\n",
157 /* on some systems, cwd can look like '@machine/' ... */
158 /* ignore everything before the first '/' */
159 for (cp = cwd; *cp && *cp != '/'; ++cp)
166 } /* get_current_working_directory */
170 filename_expand -- try to convert the given filename into a fully-qualified
174 filename_expand (char *fullpath, char *filename)
175 /* fullpath - returned full pathname */
176 /* filename - filename to expand */
182 if (filename[0] && filename[0] != '/')
183 { /* relative filename */
184 strcat (fullpath, get_current_working_directory ());
185 len = strlen (fullpath);
187 if (len > 0 && fullpath[len-1] == '/') /* trailing slash already? */
190 strcat (fullpath, "/"); /* nope, append trailing slash */
193 strcat (fullpath,filename);
195 } /* filename_expand */
197 /* Encase the string in quotes, escape all the backslashes and quotes
200 clean_string (CONST char *s)
207 for (const_p = s; *const_p; const_p++, i++)
209 if (*const_p == '\\' || *const_p == '\"')
211 else if (*const_p == '\004')
216 p = res = (char *) malloc (i + 2 + 1);
245 #define GET_ARGUMENT(var, desc) do { \
246 if (*(p + 1)) (var) = p + 1; \
251 fprintf (stderr, "%s: `%s' must be followed by an argument\n", \
260 /* A strdup immitation. */
262 my_strdup (CONST char *s)
264 char *new = malloc (strlen (s) + 1);
271 main (int argc, char *argv[])
273 int starting_line = 1; /* line to start editing at */
274 char command[MAXPATHLEN+50]; /* emacs command buffer */
275 char fullpath[MAXPATHLEN+1]; /* full pathname to file */
276 char *eval_form = NULL; /* form to evaluate with `-eval' */
277 char *eval_function = NULL; /* function to evaluate with `-f' */
278 char *load_library = NULL; /* library to load */
279 int quick = 0; /* quick edit, don't wait for user to
281 int batch = 0; /* batch mode */
282 int view = 0; /* view only. */
284 int errflg = 0; /* option error */
285 int s; /* socket / msqid to server */
286 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
288 int suppress_windows_system = 0;
289 char *display = NULL;
290 #ifdef INTERNET_DOMAIN_SOCKETS
291 char *hostarg = NULL; /* remote hostname */
293 char thishost[HOSTNAMSZ]; /* this hostname */
294 char remotepath[MAXPATHLEN+1]; /* remote pathname */
296 int rflg = 0; /* pathname given on cmdline */
298 u_short port = 0; /* port to server */
299 #endif /* INTERNET_DOMAIN_SOCKETS */
301 struct msgbuf *msgp; /* message */
302 #endif /* SYSV_IPC */
304 char buffer[GSERV_BUFSZ + 1]; /* buffer to read pid */
305 char result[GSERV_BUFSZ + 1];
308 #ifdef INTERNET_DOMAIN_SOCKETS
309 memset (remotepath, 0, sizeof (remotepath));
310 #endif /* INTERNET_DOMAIN_SOCKETS */
312 progname = strrchr (argv[0], '/');
319 tmpdir = getenv ("TMPDIR");
324 display = getenv ("DISPLAY");
326 display = my_strdup (display);
327 #ifndef HAVE_MS_WINDOWS
329 suppress_windows_system = 1;
332 for (i = 1; argv[i] && !errflg; i++)
336 else if (*argv[i] == '-'
337 && (*(argv[i] + 1) == '\0'
338 || (*(argv[i] + 1) == '-' && *(argv[i] + 2) == '\0')))
345 if (!strcmp (argv[i], "-batch") || !strcmp (argv[i], "--batch"))
347 else if (!strcmp (argv[i], "-eval") || !strcmp (argv[i], "--eval"))
351 fprintf (stderr, "%s: `-eval' must be followed by an argument\n",
357 else if (!strcmp (argv[i], "-display") || !strcmp (argv[i], "--display"))
359 suppress_windows_system = 0;
363 "%s: `-display' must be followed by an argument\n",
369 /* no need to strdup. */
372 else if (!strcmp (argv[i], "-nw"))
373 suppress_windows_system = 1;
376 /* Iterate over one-letter options. */
379 for (p = argv[i] + 1; *p && !over; p++)
390 GET_ARGUMENT (eval_function, "-f");
393 GET_ARGUMENT (load_library, "-l");
395 #ifdef INTERNET_DOMAIN_SOCKETS
397 GET_ARGUMENT (hostarg, "-h");
400 GET_ARGUMENT (portarg, "-p");
401 port = atoi (portarg);
404 GET_ARGUMENT (remotearg, "-r");
405 strcpy (remotepath, remotearg);
408 #endif /* INTERNET_DOMAIN_SOCKETS */
419 #ifdef INTERNET_DOMAIN_SOCKETS
420 "usage: %s [-nw] [-display display] [-q] [-v] [-l library]\n"
421 " [-batch] [-f function] [-eval form]\n"
422 " [-h host] [-p port] [-r remote-path] [[+line] file] ...\n",
423 #else /* !INTERNET_DOMAIN_SOCKETS */
424 "usage: %s [-nw] [-q] [-v] [-l library] [-f function] [-eval form] "
425 "[[+line] path] ...\n",
426 #endif /* !INTERNET_DOMAIN_SOCKETS */
430 if (batch && argv[i])
432 fprintf (stderr, "%s: Cannot specify `-batch' with file names\n",
436 if (suppress_windows_system && hostarg)
438 fprintf (stderr, "%s: Remote editing is available only on X\n",
444 if (eval_function || eval_form || load_library)
446 #if defined(INTERNET_DOMAIN_SOCKETS)
447 connect_type = make_connection (hostarg, port, &s);
449 connect_type = make_connection (NULL, (u_short) 0, &s);
451 sprintf (command, "(gnuserv-eval%s '(progn ", quick ? "-quickly" : "");
452 send_string (s, command);
455 send_string (s , "(load-library ");
456 send_string (s, clean_string(load_library));
457 send_string (s, ") ");
461 send_string (s, eval_form);
465 send_string (s, "(");
466 send_string (s, eval_function);
467 send_string (s, ")");
469 send_string (s, "))");
470 /* disconnect already sends EOT_STR */
472 if (connect_type == (int) CONN_IPC)
473 disconnect_from_ipc_server (s, msgp, batch && !quick);
474 #else /* !SYSV_IPC */
475 if (connect_type != (int) CONN_IPC)
476 disconnect_from_server (s, batch && !quick);
477 #endif /* !SYSV_IPC */
478 } /* eval_function || eval_form || load_library */
481 /* no sexp on the command line, so read it from stdin */
484 #if defined(INTERNET_DOMAIN_SOCKETS)
485 connect_type = make_connection (hostarg, port, &s);
487 connect_type = make_connection (NULL, (u_short) 0, &s);
489 sprintf (command, "(gnuserv-eval%s '(progn ", quick ? "-quickly" : "");
490 send_string (s, command);
492 while ((nb = read(fileno(stdin), buffer, GSERV_BUFSZ-1)) > 0)
495 send_string(s, buffer);
498 /* disconnect already sends EOT_STR */
500 if (connect_type == (int) CONN_IPC)
501 disconnect_from_ipc_server (s, msgp, batch && !quick);
502 #else /* !SYSV_IPC */
503 if (connect_type != (int) CONN_IPC)
504 disconnect_from_server (s, batch && !quick);
505 #endif /* !SYSV_IPC */
510 if (suppress_windows_system)
515 fprintf (stderr, "%s: Not connected to a tty", progname);
518 #if defined(INTERNET_DOMAIN_SOCKETS)
519 connect_type = make_connection (hostarg, port, &s);
521 connect_type = make_connection (NULL, (u_short) 0, &s);
523 send_string (s, "(gnuserv-eval '(emacs-pid))");
524 send_string (s, EOT_STR);
526 if (read_line (s, buffer) == 0)
528 fprintf (stderr, "%s: Could not establish Emacs procces id\n",
532 /* Don't do disconnect_from_server becasue we have already read
533 data, and disconnect doesn't do anything else. */
534 #ifndef INTERNET_DOMAIN_SOCKETS
535 if (connect_type == (int) CONN_IPC)
536 disconnect_from_ipc_server (s, msgp, FALSE);
537 #endif /* !SYSV_IPC */
539 emacs_pid = (pid_t)atol(buffer);
540 initialize_signals();
541 } /* suppress_windows_system */
543 #if defined(INTERNET_DOMAIN_SOCKETS)
544 connect_type = make_connection (hostarg, port, &s);
546 connect_type = make_connection (NULL, (u_short) 0, &s);
549 #ifdef INTERNET_DOMAIN_SOCKETS
550 if (connect_type == (int) CONN_INTERNET)
553 gethostname (thishost, HOSTNAMSZ);
555 { /* attempt to generate a path
557 if ((ptr = getenv ("GNU_NODE")) != NULL)
558 /* user specified a path */
559 strcpy (remotepath, ptr);
561 #if 0 /* This is really bogus... re-enable it if you must have it! */
562 #if defined (hp9000s300) || defined (hp9000s800)
563 else if (strcmp (thishost,hostarg))
564 { /* try /net/thishost */
565 strcpy (remotepath, "/net/"); /* (this fails using internet
567 strcat (remotepath, thishost);
573 { /* same machines, no need for path */
574 remotepath[0] = '\0'; /* default is the empty path */
576 #endif /* INTERNET_DOMAIN_SOCKETS */
579 if ((msgp = (struct msgbuf *)
580 malloc (sizeof *msgp + GSERV_BUFSZ)) == NULL)
582 fprintf (stderr, "%s: not enough memory for message buffer\n", progname);
586 msgp->mtext[0] = '\0'; /* ready for later strcats */
587 #endif /* SYSV_IPC */
589 if (suppress_windows_system)
591 char *term = getenv ("TERM");
594 fprintf (stderr, "%s: unknown terminal type\n", progname);
597 sprintf (command, "(gnuserv-edit-files '(tty %s %s %d) '(",
598 clean_string (tty), clean_string (term), (int)getpid ());
600 else /* !suppress_windows_system */
603 sprintf (command, "(gnuserv-edit-files '(x %s) '(",
604 clean_string (display));
605 #ifdef HAVE_MS_WINDOWS
607 sprintf (command, "(gnuserv-edit-files '(mswindows nil) '(");
609 } /* !suppress_windows_system */
610 send_string (s, command);
617 if (i < argc - 1 && *argv[i] == '+')
618 starting_line = atoi (argv[i++]);
621 /* If the last argument is +something, treat it as a file. */
627 filename_expand (fullpath, argv[i]);
628 #ifdef INTERNET_DOMAIN_SOCKETS
629 path = malloc (strlen (remotepath) + strlen (fullpath) + 1);
630 sprintf (path, "%s%s", remotepath, fullpath);
632 path = my_strdup (fullpath);
634 sprintf (command, "(%d . %s)", starting_line, clean_string (path));
635 send_string (s, command);
639 sprintf (command, ")%s%s",
640 (quick || (nofiles && !suppress_windows_system)) ? " 'quick" : "",
641 view ? " 'view" : "");
642 send_string (s, command);
643 send_string (s, ")");
646 if (connect_type == (int) CONN_IPC)
647 disconnect_from_ipc_server (s, msgp, FALSE);
648 #else /* !SYSV_IPC */
649 if (connect_type != (int) CONN_IPC)
650 disconnect_from_server (s, FALSE);
651 #endif /* !SYSV_IPC */
659 #endif /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */