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0
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1 /* -*-C-*-
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2 Client code to allow local and remote editing of files by XEmacs.
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3 Copyright (C) 1989 Free Software Foundation, Inc.
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4 Copyright (C) 1995 Sun Microsystems, Inc.
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5
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6 This file is part of XEmacs.
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7
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8 XEmacs is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 2, or (at your option) any
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11 later version.
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12
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13 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with XEmacs; see the file COPYING. If not, write to
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20 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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21 Boston, MA 02111-1307, USA.
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22
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23 Author: Andy Norman (ange@hplb.hpl.hp.com), based on
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24 'etc/emacsclient.c' from the GNU Emacs 18.52 distribution.
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25
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26 Please mail bugs and suggestions to the author at the above address.
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27 */
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28
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29 /*
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30 * This file incorporates new features added by Bob Weiner <weiner@mot.com>,
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31 * Darrell Kindred <dkindred@cmu.edu> and Arup Mukherjee <arup@cmu.edu>.
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32 * GNUATTACH support added by Ben Wing <wing@xemacs.org>.
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33 * Please see the note at the end of the README file for details.
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34 *
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35 * (If gnuserv came bundled with your emacs, the README file is probably
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36 * ../etc/gnuserv.README relative to the directory containing this file)
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37 */
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38
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39 #if 0
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40 /* Hand-munged RCS header */
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41 static char rcsid [] = "!Header: gnuclient.c,v 2.2 95/12/12 01:39:21 wing nene !";
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42 #endif
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43
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44 #include "gnuserv.h"
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45 #include "getopt.h"
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46
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47 #include <stdio.h>
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48 #include <stdlib.h>
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49 #include <string.h>
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50 #include <sys/types.h>
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51 #include <unistd.h>
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52
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53 #if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && \
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54 !defined(INTERNET_DOMAIN_SOCKETS)
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12
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55 int
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56 main (int argc, char *argv[])
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0
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57 {
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58 fprintf (stderr, "Sorry, the Emacs server is only "
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59 "supported on systems that have\n");
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60 fprintf (stderr, "Unix Domain sockets, Internet Domain "
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61 "sockets or System V IPC.\n");
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62 exit (1);
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63 } /* main */
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64 #else /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
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65
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66 static char cwd[MAXPATHLEN+2]; /* current working directory when calculated */
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67 static char *cp = NULL; /* ptr into valid bit of cwd above */
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68
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30
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69 #ifdef GNUATTACH
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70 #include <signal.h>
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71
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72 static pid_t emacs_pid; /* Process id for emacs process */
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73
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74 void tell_emacs_to_resume(int sig)
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75 {
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76 char buffer[GSERV_BUFSZ+1];
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77 int s; /* socket / msqid to server */
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78 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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79 * CONN_IPC */
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80
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81 /* Why is SYSV so retarded? */
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82 /* We want emacs to realize that we are resuming */
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83 signal(SIGCONT, tell_emacs_to_resume);
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84
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85 connect_type = make_connection (NULL, (u_short) 0, &s);
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86
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87 sprintf(buffer,"(server-eval '(resume-pid-console %d))", getpid());
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88 send_string(s, buffer);
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89
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90 #ifdef SYSV_IPC
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91 if (connect_type == (int) CONN_IPC)
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92 disconnect_from_ipc_server (s, msgp, FALSE);
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93 #else /* !SYSV_IPC */
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94 if (connect_type != (int) CONN_IPC)
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95 disconnect_from_server (s, FALSE);
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96 #endif /* !SYSV_IPC */
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97 }
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98
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99 void pass_signal_to_emacs(int sig)
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100 {
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101 if (kill(emacs_pid, sig) == -1) {
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102 fprintf(stderr, "gnuattach: Could not pass signal to emacs process\n");
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103 exit(1);
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104 }
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105 }
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106
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107 void initialize_signals()
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108 {
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109 /* Set up signal handler to pass relevant signals to emacs process */
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110 signal(SIGHUP, pass_signal_to_emacs);
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111 signal(SIGQUIT, pass_signal_to_emacs);
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112 signal(SIGILL, pass_signal_to_emacs);
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113 signal(SIGTRAP, pass_signal_to_emacs);
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114 signal(SIGSEGV, pass_signal_to_emacs);
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115 signal(SIGPIPE, pass_signal_to_emacs);
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116 signal(SIGTERM, pass_signal_to_emacs);
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117 #ifdef SIGBUS
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118 signal(SIGBUS, pass_signal_to_emacs);
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119 #endif
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120 #ifdef SIGIOT
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121 signal(SIGIOT, pass_signal_to_emacs);
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122 #endif
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123
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124 /* We want emacs to realize that we are resuming */
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125 signal(SIGCONT, tell_emacs_to_resume);
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126 }
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127
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128 #endif /* GNUATTACH */
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129
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0
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130
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131 /*
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132 get_current_working_directory -- return the cwd.
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133 */
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134 static char *
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135 get_current_working_directory (void)
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136 {
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137 if (cp == NULL)
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138 { /* haven't calculated it yet */
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139 #ifdef BSD
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140 if (getwd (cwd) == 0)
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141 #else /* !BSD */
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142 if (getcwd (cwd,MAXPATHLEN) == NULL)
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143 #endif /* !BSD */
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144 {
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145 perror (progname);
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146 fprintf (stderr, "%s: unable to get current working directory\n",
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147 progname);
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148 exit (1);
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149 } /* if */
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150
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151 /* on some systems, cwd can look like '@machine/' ... */
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152 /* ignore everything before the first '/' */
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153 for (cp = cwd; *cp && *cp != '/'; ++cp)
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154 ;
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155
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156 } /* if */
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157
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158 return cp;
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159
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160 } /* get_current_working_directory */
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161
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162
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163 /*
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164 filename_expand -- try to convert the given filename into a fully-qualified
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165 pathname.
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166 */
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167 static void
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168 filename_expand (char *fullpath, char *filename)
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169 /* fullpath - returned full pathname */
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170 /* filename - filename to expand */
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171 {
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172 int len;
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173
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174 fullpath[0] = '\0';
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175
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176 if (filename[0] && filename[0] != '/')
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177 { /* relative filename */
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178 strcat (fullpath, get_current_working_directory ());
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179 len = strlen (fullpath);
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180
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181 if (len > 0 && fullpath[len-1] == '/') /* trailing slash already? */
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182 ; /* yep */
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183 else
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184 strcat (fullpath, "/"); /* nope, append trailing slash */
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185 } /* if */
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186
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187 strcat (fullpath,filename);
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188
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189 } /* filename_expand */
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190
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12
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191 int
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192 main (int argc, char *argv[])
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0
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193 {
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194 int starting_line = 1; /* line to start editing at */
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30
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195 char command[MAXPATHLEN+50]; /* emacs command buffer */
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0
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196 char fullpath[MAXPATHLEN+1]; /* full pathname to file */
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197 #ifndef GNUATTACH
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198 int qflg = 0; /* quick edit, don't wait for
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199 * user to finish */
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200 #endif
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201 int errflg = 0; /* option error */
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202 int c; /* char from getopt */
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203 int s; /* socket / msqid to server */
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204 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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205 * CONN_IPC */
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206 #ifdef INTERNET_DOMAIN_SOCKETS
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207 char *hostarg = NULL; /* remote hostname */
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208 char thishost[HOSTNAMSZ]; /* this hostname */
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209 char remotepath[MAXPATHLEN+1]; /* remote pathname */
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210 int rflg = 0; /* pathname given on cmdline */
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211 u_short portarg = 0; /* port to server */
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212 char *ptr; /* return from getenv */
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213 #endif /* INTERNET_DOMAIN_SOCKETS */
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214 #ifdef SYSV_IPC
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215 struct msgbuf *msgp; /* message */
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216 #endif /* SYSV_IPC */
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217 #ifdef GNUATTACH
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218 char *tty;
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30
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219 char buffer[GSERV_BUFSZ+1]; /* buffer to read pid */
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0
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220 #endif
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221
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222 #ifdef INTERNET_DOMAIN_SOCKETS
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223 memset (remotepath, 0, sizeof (remotepath));
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224 #endif /* INTERNET_DOMAIN_SOCKETS */
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225
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226 progname = argv[0];
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227
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228 while ((c = getopt (argc, argv,
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229
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230 #ifdef INTERNET_DOMAIN_SOCKETS
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231 "h:p:r:q"
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232 #else /* !INTERNET_DOMAIN_SOCKETS */
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233 # ifdef GNUATTACH
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234 ""
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235 # else
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236 "q"
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237 # endif
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238 #endif /* !INTERNET_DOMAIN_SOCKETS */
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239
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240 )) != EOF)
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241 switch (c)
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242 {
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243 #ifndef GNUATTACH
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244 case 'q': /* quick mode specified */
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245 qflg++;
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246 break;
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247 #endif
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248
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249 #ifdef INTERNET_DOMAIN_SOCKETS
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250 case 'h': /* server host name specified */
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251 hostarg = optarg;
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252 break;
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253 case 'r': /* remote path from server specifed */
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254 strcpy (remotepath,optarg);
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255 rflg++;
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256 break;
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257 case 'p': /* port number specified */
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258 portarg = atoi (optarg);
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259 break;
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260 #endif /* INTERNET_DOMAIN_SOCKETS */
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261
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262 case '?':
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263 errflg++;
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264 } /* switch */
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265
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266 if (errflg)
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267 {
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268 fprintf (stderr,
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269 #ifdef INTERNET_DOMAIN_SOCKETS
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270 "usage: %s [-q] [-h hostname] [-p port] [-r pathname] "
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271 "[[+line] path] ...\n",
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272 #else /* !INTERNET_DOMAIN_SOCKETS */
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273 # ifdef GNUATTACH
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274 "usage: %s [[+line] path] ...\n",
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275 # else
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276 "usage: %s [-q] [[+line] path] ...\n",
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277 # endif
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278 #endif /* !INTERNET_DOMAIN_SOCKETS */
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279 progname);
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280 exit (1);
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281 } /* if */
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282
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283 #ifdef GNUATTACH
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284 tty = ttyname (0);
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285 if (!tty)
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286 {
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287 fprintf (stderr, "%s: Not connected to a tty", progname);
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288 exit (1);
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289 }
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30
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290
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291 /* This next stuff added in an attempt to make handling of
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292 the tty do the right thing when dealing with signals.
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293 Idea is to pass all the appropriate signals to the emacs process
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294 */
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295
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296 connect_type = make_connection (NULL, (u_short) 0, &s);
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0
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297
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30
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298 send_string(s,"(server-eval '(emacs-pid))");
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299 send_string(s,EOT_STR);
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300
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301 if (read_line(s,buffer) == 0) {
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302 fprintf(stderr, "%s: Could not establish emacs procces id\n",progname);
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303 exit(1);
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304 }
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305 /* don't do disconnect_from_server becasue we have already read data,
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306 and disconnect doesn't do anything else
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307 */
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308 #ifdef SYSV_IPC
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309 if (connect_type == (int) CONN_IPC)
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310 disconnect_from_ipc_server (s, msgp, FALSE);
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311 #endif /* !SYSV_IPC */
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312
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313 emacs_pid = (pid_t)atol(buffer);
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314 initialize_signals();
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315
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316 #endif /*GNUATTACH */
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317
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318 #if defined(INTERNET_DOMAIN_SOCKETS) && !defined(GNUATTACH)
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0
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319 connect_type = make_connection (hostarg, portarg, &s);
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320 #else
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321 connect_type = make_connection (NULL, (u_short) 0, &s);
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322 #endif
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323
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324 #ifdef INTERNET_DOMAIN_SOCKETS
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325 if (connect_type == (int) CONN_INTERNET)
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326 {
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327 gethostname (thishost, HOSTNAMSZ);
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328 if (!rflg)
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329 { /* attempt to generate a path
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330 * to this machine */
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331 if ((ptr = getenv ("GNU_NODE")) != NULL)
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332 /* user specified a path */
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333 strcpy (remotepath, ptr);
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334 }
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335 #if 0 /* This is really bogus... re-enable it if you must have it! */
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336 #if defined (hp9000s300) || defined (hp9000s800)
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337 else if (strcmp (thishost,hostarg))
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338 { /* try /net/thishost */
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339 strcpy (remotepath, "/net/"); /* (this fails using internet
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340 addresses) */
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341 strcat (remotepath, thishost);
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342 }
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343 #endif
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344 #endif
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345 }
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346 else
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347 { /* same machines, no need for path */
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348 remotepath[0] = '\0'; /* default is the empty path */
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349 }
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350 #endif /* INTERNET_DOMAIN_SOCKETS */
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351
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352 #ifdef SYSV_IPC
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353 if ((msgp = (struct msgbuf *)
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354 malloc (sizeof *msgp + GSERV_BUFSZ)) == NULL)
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355 {
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356 fprintf (stderr, "%s: not enough memory for message buffer\n", progname);
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357 exit (1);
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358 } /* if */
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359
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360 msgp->mtext[0] = '\0'; /* ready for later strcats */
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361 #endif /* SYSV_IPC */
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362
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363 #ifdef GNUATTACH
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364 ptr = getenv ("TERM");
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365 if (!ptr)
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366 {
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367 fprintf (stderr, "%s: unknown terminal type\n", progname);
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368 exit (1);
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369 }
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30
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370 sprintf (command, "(server-tty-edit-files \"%s\" \"%s\" %d '(",
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371 tty, ptr, getpid());
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0
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372 send_string (s, command);
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373 #else
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374 if (qflg)
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375 {
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376 send_string (s, "(server-edit-files-quickly '(");
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377 }
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378 else
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379 {
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380 send_string (s, "(server-edit-files '(");
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381 }
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382 #endif
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383
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384 for (; optind < argc; optind++)
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385 {
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386 if (*argv[optind] == '+')
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387 starting_line = atoi (argv[optind]);
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388 else
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389 {
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390 filename_expand (fullpath, argv[optind]);
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391 sprintf (command, "(%d . \"%s%s\")", starting_line,
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392
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393 #ifdef INTERNET_DOMAIN_SOCKETS
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394 remotepath,
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395 #else /* !INTERNET_DOMAIN_SOCKETS */
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396 "",
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397 #endif
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398 fullpath);
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399 send_string (s,command);
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400 starting_line = 1;
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401 } /* else */
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402 } /* for */
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403
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404 send_string (s,"))");
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405
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406 #ifdef SYSV_IPC
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407 if (connect_type == (int) CONN_IPC)
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408 disconnect_from_ipc_server (s, msgp, FALSE);
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409 #else /* !SYSV_IPC */
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410 if (connect_type != (int) CONN_IPC)
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411 disconnect_from_server (s, FALSE);
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412 #endif /* !SYSV_IPC */
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413
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12
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414 return 0;
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0
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415
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416 } /* main */
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417
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418 #endif /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
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