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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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149
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5 Copyright (C) 1997 Free Software Foundation, Inc.
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0
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA.
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23
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24 Author: Andy Norman (ange@hplb.hpl.hp.com), based on
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25 'etc/emacsclient.c' from the GNU Emacs 18.52 distribution.
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26
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27 Please mail bugs and suggestions to the author at the above address.
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28 */
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29
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30 /*
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31 * This file incorporates new features added by Bob Weiner <weiner@mot.com>,
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32 * Darrell Kindred <dkindred@cmu.edu> and Arup Mukherjee <arup@cmu.edu>.
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33 * GNUATTACH support added by Ben Wing <wing@xemacs.org>.
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34 * Please see the note at the end of the README file for details.
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35 *
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36 * (If gnuserv came bundled with your emacs, the README file is probably
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37 * ../etc/gnuserv.README relative to the directory containing this file)
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38 */
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39
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40 #if 0
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41 /* Hand-munged RCS header */
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42 static char rcsid [] = "!Header: gnuclient.c,v 2.2 95/12/12 01:39:21 wing nene !";
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43 #endif
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44
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45 #include "gnuserv.h"
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46 #include "getopt.h"
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47
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48 #include <stdio.h>
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49 #include <stdlib.h>
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149
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50 #ifdef HAVE_STRING_H
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0
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51 #include <string.h>
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149
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52 #endif /* HAVE_STRING_H */
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0
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53 #include <sys/types.h>
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149
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54 #ifdef HAVE_UNISTD_H
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0
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55 #include <unistd.h>
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149
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56 #endif /* HAVE_UNISTD_H */
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57 #include <signal.h>
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58
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0
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59
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60 #if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && \
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61 !defined(INTERNET_DOMAIN_SOCKETS)
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78
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62 int
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63 main (int argc, char *argv[])
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0
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64 {
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65 fprintf (stderr, "Sorry, the Emacs server is only "
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66 "supported on systems that have\n");
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67 fprintf (stderr, "Unix Domain sockets, Internet Domain "
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68 "sockets or System V IPC.\n");
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69 exit (1);
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70 } /* main */
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71 #else /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
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72
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73 static char cwd[MAXPATHLEN+2]; /* current working directory when calculated */
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74 static char *cp = NULL; /* ptr into valid bit of cwd above */
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75
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108
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76 static pid_t emacs_pid; /* Process id for emacs process */
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77
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149
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78 void initialize_signals (void);
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79
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80 void
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81 tell_emacs_to_resume (int sig)
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108
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82 {
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149
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83 char buffer[GSERV_BUFSZ+1];
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84 int s; /* socket / msqid to server */
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85 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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86 ONN_IPC */
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108
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87
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88 /* Why is SYSV so retarded? */
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89 /* We want emacs to realize that we are resuming */
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149
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90 signal(SIGCONT, tell_emacs_to_resume);
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108
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91
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149
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92 connect_type = make_connection (NULL, (u_short) 0, &s);
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108
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93
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149
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94 sprintf(buffer,"(gnuserv-eval '(resume-pid-console %d))", getpid());
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95 send_string(s, buffer);
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96
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108
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97 #ifdef SYSV_IPC
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98 if (connect_type == (int) CONN_IPC)
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99 disconnect_from_ipc_server (s, msgp, FALSE);
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100 #else /* !SYSV_IPC */
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101 if (connect_type != (int) CONN_IPC)
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102 disconnect_from_server (s, FALSE);
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103 #endif /* !SYSV_IPC */
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104 }
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105
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149
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106 void
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107 pass_signal_to_emacs (int sig)
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108
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108 {
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149
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109 if (kill (emacs_pid, sig) == -1)
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110 {
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111 fprintf (stderr, "gnuattach: Could not pass signal to emacs process\n");
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112 exit (1);
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113 }
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114 initialize_signals ();
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108
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115 }
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116
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149
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117 void
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118 initialize_signals ()
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108
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119 {
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149
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120 /* Set up signal handler to pass relevant signals to emacs process.
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121 We used to send SIGSEGV, SIGBUS, SIGPIPE, SIGILL and others to
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122 Emacs, but I think it's better not to. I can see no reason why
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123 Emacs should SIGSEGV whenever gnuclient SIGSEGV-s, etc. */
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124 signal (SIGHUP, pass_signal_to_emacs);
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125 signal (SIGQUIT, pass_signal_to_emacs);
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126 signal (SIGINT, pass_signal_to_emacs);
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108
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127
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128 /* We want emacs to realize that we are resuming */
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149
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129 signal (SIGCONT, tell_emacs_to_resume);
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108
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130 }
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131
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0
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132
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133 /*
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134 get_current_working_directory -- return the cwd.
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135 */
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136 static char *
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137 get_current_working_directory (void)
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138 {
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139 if (cp == NULL)
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140 { /* haven't calculated it yet */
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141 #ifdef BSD
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142 if (getwd (cwd) == 0)
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143 #else /* !BSD */
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144 if (getcwd (cwd,MAXPATHLEN) == NULL)
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145 #endif /* !BSD */
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146 {
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147 perror (progname);
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148 fprintf (stderr, "%s: unable to get current working directory\n",
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149 progname);
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150 exit (1);
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151 } /* if */
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152
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153 /* on some systems, cwd can look like '@machine/' ... */
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154 /* ignore everything before the first '/' */
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155 for (cp = cwd; *cp && *cp != '/'; ++cp)
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156 ;
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157
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158 } /* if */
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159
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160 return cp;
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161
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162 } /* get_current_working_directory */
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163
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164
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165 /*
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166 filename_expand -- try to convert the given filename into a fully-qualified
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167 pathname.
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168 */
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169 static void
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170 filename_expand (char *fullpath, char *filename)
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171 /* fullpath - returned full pathname */
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172 /* filename - filename to expand */
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173 {
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174 int len;
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175
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176 fullpath[0] = '\0';
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177
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178 if (filename[0] && filename[0] != '/')
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179 { /* relative filename */
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180 strcat (fullpath, get_current_working_directory ());
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181 len = strlen (fullpath);
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182
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183 if (len > 0 && fullpath[len-1] == '/') /* trailing slash already? */
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184 ; /* yep */
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185 else
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186 strcat (fullpath, "/"); /* nope, append trailing slash */
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187 } /* if */
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188
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189 strcat (fullpath,filename);
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190
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191 } /* filename_expand */
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192
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78
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193 int
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194 main (int argc, char *argv[])
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0
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195 {
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196 int starting_line = 1; /* line to start editing at */
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149
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197 char command[MAXPATHLEN+50]; /* emacs command buffer */
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0
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198 char fullpath[MAXPATHLEN+1]; /* full pathname to file */
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199 int qflg = 0; /* quick edit, don't wait for
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200 * user to finish */
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149
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201 int view = 0; /* view only. */
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0
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202 int errflg = 0; /* option error */
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203 int c; /* char from getopt */
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204 int s; /* socket / msqid to server */
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205 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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206 * CONN_IPC */
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149
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207 int suppress_windows_system = 0;
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208 char *display;
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0
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209 #ifdef INTERNET_DOMAIN_SOCKETS
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210 char *hostarg = NULL; /* remote hostname */
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211 char thishost[HOSTNAMSZ]; /* this hostname */
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212 char remotepath[MAXPATHLEN+1]; /* remote pathname */
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213 int rflg = 0; /* pathname given on cmdline */
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214 u_short portarg = 0; /* port to server */
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215 char *ptr; /* return from getenv */
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216 #endif /* INTERNET_DOMAIN_SOCKETS */
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217 #ifdef SYSV_IPC
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218 struct msgbuf *msgp; /* message */
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219 #endif /* SYSV_IPC */
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220 char *tty;
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108
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221 char buffer[GSERV_BUFSZ+1]; /* buffer to read pid */
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0
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222
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223 #ifdef INTERNET_DOMAIN_SOCKETS
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224 memset (remotepath, 0, sizeof (remotepath));
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225 #endif /* INTERNET_DOMAIN_SOCKETS */
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226
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227 progname = argv[0];
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228
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149
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229 display = getenv ("DISPLAY");
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230 if (!display)
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231 suppress_windows_system = 1;
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232
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0
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233 while ((c = getopt (argc, argv,
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234
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235 #ifdef INTERNET_DOMAIN_SOCKETS
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149
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236 "n:h:p:r:qv"
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0
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237 #else /* !INTERNET_DOMAIN_SOCKETS */
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149
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238 "n:qv"
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0
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239 #endif /* !INTERNET_DOMAIN_SOCKETS */
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240
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241 )) != EOF)
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242 switch (c)
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243 {
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149
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244 case 'n':
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245 if (*optarg == 'w')
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246 suppress_windows_system++;
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247 else
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248 errflg++;
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249 break;
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0
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250 case 'q': /* quick mode specified */
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251 qflg++;
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252 break;
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149
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253 case 'v':
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254 view++;
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255 break;
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0
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256
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257 #ifdef INTERNET_DOMAIN_SOCKETS
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258 case 'h': /* server host name specified */
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259 hostarg = optarg;
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260 break;
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261 case 'r': /* remote path from server specifed */
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262 strcpy (remotepath,optarg);
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263 rflg++;
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264 break;
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265 case 'p': /* port number specified */
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266 portarg = atoi (optarg);
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267 break;
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268 #endif /* INTERNET_DOMAIN_SOCKETS */
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269
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270 case '?':
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271 errflg++;
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272 } /* switch */
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273
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274 if (errflg)
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275 {
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276 fprintf (stderr,
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277 #ifdef INTERNET_DOMAIN_SOCKETS
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278 "usage: %s [-q] [-h hostname] [-p port] [-r pathname] "
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279 "[[+line] path] ...\n",
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280 #else /* !INTERNET_DOMAIN_SOCKETS */
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149
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281 "usage: %s [-nw] [-q] [[+line] path] ...\n",
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0
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282 #endif /* !INTERNET_DOMAIN_SOCKETS */
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283 progname);
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284 exit (1);
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285 } /* if */
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286
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149
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287 if (suppress_windows_system)
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0
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288 {
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149
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289 tty = ttyname (0);
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290 if (!tty)
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291 {
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292 fprintf (stderr, "%s: Not connected to a tty", progname);
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293 exit (1);
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294 }
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0
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295 }
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149
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296 /* This next stuff added in an attempt to make handling of the tty
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297 do the right thing when dealing with signals. The idea is to
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298 pass all the appropriate signals to the emacs process. */
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108
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299
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300 connect_type = make_connection (NULL, (u_short) 0, &s);
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0
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301
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149
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302 send_string (s, "(gnuserv-eval '(emacs-pid))");
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303 send_string (s, EOT_STR);
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304
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305 if (read_line (s, buffer) == 0)
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306 {
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307 fprintf (stderr, "%s: Could not establish emacs procces id\n",
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308 progname);
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309 exit (1);
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310 }
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311 /* Don't do disconnect_from_server becasue we have already read
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312 data, and disconnect doesn't do anything else. */
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108
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313 #ifdef SYSV_IPC
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314 if (connect_type == (int) CONN_IPC)
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315 disconnect_from_ipc_server (s, msgp, FALSE);
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316 #endif /* !SYSV_IPC */
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317
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318 emacs_pid = (pid_t)atol(buffer);
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319 initialize_signals();
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320
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321 #if defined(INTERNET_DOMAIN_SOCKETS) && !defined(GNUATTACH)
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0
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322 connect_type = make_connection (hostarg, portarg, &s);
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323 #else
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324 connect_type = make_connection (NULL, (u_short) 0, &s);
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325 #endif
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326
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327 #ifdef INTERNET_DOMAIN_SOCKETS
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328 if (connect_type == (int) CONN_INTERNET)
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329 {
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330 gethostname (thishost, HOSTNAMSZ);
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331 if (!rflg)
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332 { /* attempt to generate a path
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333 * to this machine */
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334 if ((ptr = getenv ("GNU_NODE")) != NULL)
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335 /* user specified a path */
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336 strcpy (remotepath, ptr);
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337 }
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338 #if 0 /* This is really bogus... re-enable it if you must have it! */
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339 #if defined (hp9000s300) || defined (hp9000s800)
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340 else if (strcmp (thishost,hostarg))
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341 { /* try /net/thishost */
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342 strcpy (remotepath, "/net/"); /* (this fails using internet
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343 addresses) */
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344 strcat (remotepath, thishost);
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345 }
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346 #endif
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347 #endif
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348 }
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349 else
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350 { /* same machines, no need for path */
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351 remotepath[0] = '\0'; /* default is the empty path */
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352 }
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353 #endif /* INTERNET_DOMAIN_SOCKETS */
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354
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355 #ifdef SYSV_IPC
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356 if ((msgp = (struct msgbuf *)
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357 malloc (sizeof *msgp + GSERV_BUFSZ)) == NULL)
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358 {
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359 fprintf (stderr, "%s: not enough memory for message buffer\n", progname);
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360 exit (1);
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361 } /* if */
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362
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363 msgp->mtext[0] = '\0'; /* ready for later strcats */
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364 #endif /* SYSV_IPC */
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365
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149
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366 if (suppress_windows_system)
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0
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367 {
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149
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368 ptr = getenv ("TERM");
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369 if (!ptr)
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370 {
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371 fprintf (stderr, "%s: unknown terminal type\n", progname);
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372 exit (1);
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373 }
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374 sprintf (command,
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375 "(gnuserv-edit-files '(tty \"%s\" \"%s\" %d) '(",
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376 tty, ptr, getpid ());
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0
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377 }
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149
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378 else /* !suppress_windows_system */
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379 {
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380 sprintf (command, "(gnuserv-edit-files '(x \"%s\") '(",
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381 display);
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382 } /* !suppress_windows_system */
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0
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383 send_string (s, command);
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149
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384
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385 if (!suppress_windows_system && (optind == argc))
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386 qflg = 1;
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0
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387
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388 for (; optind < argc; optind++)
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389 {
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149
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390 if (optind < argc - 1 && *argv[optind] == '+')
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391 starting_line = atoi (argv[optind++]);
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0
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392 else
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149
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393 starting_line = 1;
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394 /* If the last argument is +something, treat it as a file. */
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|
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395 if (optind == argc)
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0
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396 {
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149
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397 starting_line = 1;
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398 --optind;
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|
|
399 }
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|
|
400 filename_expand (fullpath, argv[optind]);
|
|
|
401 sprintf (command, "(%d . \"%s%s\")", starting_line,
|
|
0
|
402 #ifdef INTERNET_DOMAIN_SOCKETS
|
|
149
|
403 remotepath,
|
|
0
|
404 #else /* !INTERNET_DOMAIN_SOCKETS */
|
|
149
|
405 "",
|
|
0
|
406 #endif
|
|
149
|
407 fullpath);
|
|
|
408 send_string (s, command);
|
|
0
|
409 } /* for */
|
|
|
410
|
|
149
|
411 sprintf (command, ") %s)", qflg ? "'quick" : (view ? "'view" : ""));
|
|
|
412 send_string (s, command);
|
|
0
|
413
|
|
|
414 #ifdef SYSV_IPC
|
|
|
415 if (connect_type == (int) CONN_IPC)
|
|
|
416 disconnect_from_ipc_server (s, msgp, FALSE);
|
|
|
417 #else /* !SYSV_IPC */
|
|
|
418 if (connect_type != (int) CONN_IPC)
|
|
|
419 disconnect_from_server (s, FALSE);
|
|
|
420 #endif /* !SYSV_IPC */
|
|
|
421
|
|
78
|
422 return 0;
|
|
0
|
423
|
|
|
424 } /* main */
|
|
|
425
|
|
|
426 #endif /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
|
