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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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153
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59 int read_line(int, char *);
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0
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60
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61 #if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && \
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62 !defined(INTERNET_DOMAIN_SOCKETS)
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78
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63 int
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64 main (int argc, char *argv[])
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0
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65 {
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66 fprintf (stderr, "Sorry, the Emacs server is only "
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67 "supported on systems that have\n");
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68 fprintf (stderr, "Unix Domain sockets, Internet Domain "
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69 "sockets or System V IPC.\n");
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70 exit (1);
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71 } /* main */
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72 #else /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
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73
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74 static char cwd[MAXPATHLEN+2]; /* current working directory when calculated */
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75 static char *cp = NULL; /* ptr into valid bit of cwd above */
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76
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108
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77 static pid_t emacs_pid; /* Process id for emacs process */
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78
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149
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79 void initialize_signals (void);
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80
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167
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81 static void
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149
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82 tell_emacs_to_resume (int sig)
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108
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83 {
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149
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84 char buffer[GSERV_BUFSZ+1];
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85 int s; /* socket / msqid to server */
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86 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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87 ONN_IPC */
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108
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88
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89 /* Why is SYSV so retarded? */
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90 /* We want emacs to realize that we are resuming */
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149
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91 signal(SIGCONT, tell_emacs_to_resume);
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108
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92
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149
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93 connect_type = make_connection (NULL, (u_short) 0, &s);
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108
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94
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153
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95 sprintf(buffer,"(gnuserv-eval '(resume-pid-console %d))", (int)getpid());
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149
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96 send_string(s, buffer);
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97
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108
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98 #ifdef SYSV_IPC
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99 if (connect_type == (int) CONN_IPC)
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100 disconnect_from_ipc_server (s, msgp, FALSE);
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101 #else /* !SYSV_IPC */
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102 if (connect_type != (int) CONN_IPC)
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103 disconnect_from_server (s, FALSE);
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104 #endif /* !SYSV_IPC */
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105 }
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106
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167
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107 static void
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149
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108 pass_signal_to_emacs (int sig)
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108
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109 {
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149
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110 if (kill (emacs_pid, sig) == -1)
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111 {
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112 fprintf (stderr, "gnuattach: Could not pass signal to emacs process\n");
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113 exit (1);
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114 }
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115 initialize_signals ();
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108
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116 }
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117
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149
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118 void
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119 initialize_signals ()
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108
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120 {
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149
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121 /* Set up signal handler to pass relevant signals to emacs process.
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122 We used to send SIGSEGV, SIGBUS, SIGPIPE, SIGILL and others to
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123 Emacs, but I think it's better not to. I can see no reason why
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124 Emacs should SIGSEGV whenever gnuclient SIGSEGV-s, etc. */
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125 signal (SIGHUP, pass_signal_to_emacs);
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126 signal (SIGQUIT, pass_signal_to_emacs);
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127 signal (SIGINT, pass_signal_to_emacs);
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151
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128 #ifdef SIGWINCH
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129 signal (SIGWINCH, pass_signal_to_emacs);
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130 #endif
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108
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131
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132 /* We want emacs to realize that we are resuming */
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149
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133 signal (SIGCONT, tell_emacs_to_resume);
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108
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134 }
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135
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0
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136
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137 /*
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138 get_current_working_directory -- return the cwd.
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139 */
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140 static char *
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141 get_current_working_directory (void)
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142 {
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143 if (cp == NULL)
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144 { /* haven't calculated it yet */
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145 #ifdef BSD
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146 if (getwd (cwd) == 0)
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147 #else /* !BSD */
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148 if (getcwd (cwd,MAXPATHLEN) == NULL)
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149 #endif /* !BSD */
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150 {
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151 perror (progname);
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152 fprintf (stderr, "%s: unable to get current working directory\n",
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153 progname);
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154 exit (1);
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155 } /* if */
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156
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157 /* on some systems, cwd can look like '@machine/' ... */
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158 /* ignore everything before the first '/' */
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159 for (cp = cwd; *cp && *cp != '/'; ++cp)
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160 ;
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161
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162 } /* if */
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163
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164 return cp;
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165
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166 } /* get_current_working_directory */
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167
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168
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169 /*
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170 filename_expand -- try to convert the given filename into a fully-qualified
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171 pathname.
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172 */
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173 static void
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174 filename_expand (char *fullpath, char *filename)
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175 /* fullpath - returned full pathname */
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176 /* filename - filename to expand */
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177 {
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178 int len;
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179
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180 fullpath[0] = '\0';
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181
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182 if (filename[0] && filename[0] != '/')
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183 { /* relative filename */
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184 strcat (fullpath, get_current_working_directory ());
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185 len = strlen (fullpath);
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186
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187 if (len > 0 && fullpath[len-1] == '/') /* trailing slash already? */
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188 ; /* yep */
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189 else
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190 strcat (fullpath, "/"); /* nope, append trailing slash */
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191 } /* if */
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192
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193 strcat (fullpath,filename);
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194
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195 } /* filename_expand */
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196
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151
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197 /* Encase the string in quotes, escape all the backslashes and quotes
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198 in string. */
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167
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199 static char *
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151
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200 clean_string (CONST char *s)
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201 {
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202 int i = 0;
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203 char *p, *res;
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204
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205 for (p = s; *p; p++, i++)
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206 {
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207 if (*p == '\\' || *p == '\"')
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208 ++i;
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209 else if (*p == '\004')
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210 i += 3;
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211 }
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212 p = res = (char *)malloc (i + 2 + 1);
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213 *p++ = '\"';
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214 for (; *s; p++, s++)
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215 {
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216 switch (*s)
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217 {
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218 case '\\':
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219 *p++ = '\\';
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220 *p = '\\';
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221 break;
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222 case '\"':
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223 *p++ = '\\';
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224 *p = '\"';
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225 break;
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226 case '\004':
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227 *p++ = '\\';
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228 *p++ = 'C';
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229 *p++ = '-';
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230 *p = 'd';
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231 break;
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232 default:
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233 *p = *s;
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234 }
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235 }
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236 *p++ = '\"';
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237 *p = '\0';
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238 return res;
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239 }
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240
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241 #define GET_ARGUMENT(var, desc) do { \
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242 if (*(p + 1)) (var) = p + 1; \
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243 else \
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244 { \
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245 if (!argv[++i]) \
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246 { \
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247 fprintf (stderr, "%s: `%s' must be followed by an argument\n", \
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248 progname, desc); \
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249 exit (1); \
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250 } \
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251 (var) = argv[i]; \
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252 } \
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253 over = 1; \
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254 } while (0)
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255
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153
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256 /* A strdup immitation. */
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257 static char *
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258 my_strdup (CONST char *s)
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259 {
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260 char *new = malloc (strlen (s) + 1);
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261 if (new)
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262 strcpy (new, s);
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263 return new;
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264 }
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151
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265
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78
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266 int
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267 main (int argc, char *argv[])
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0
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268 {
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151
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269 int starting_line = 1; /* line to start editing at */
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270 char command[MAXPATHLEN+50]; /* emacs command buffer */
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271 char fullpath[MAXPATHLEN+1]; /* full pathname to file */
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272 char *eval_form = NULL; /* form to evaluate with `-eval' */
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273 char *eval_function = NULL; /* function to evaluate with `-f' */
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274 char *load_library = NULL; /* library to load */
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275 int quick = 0; /* quick edit, don't wait for user to
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276 finish */
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277 int batch = 0; /* batch mode */
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278 int view = 0; /* view only. */
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279 int nofiles = 0;
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280 int errflg = 0; /* option error */
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281 int s; /* socket / msqid to server */
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282 int connect_type; /* CONN_UNIX, CONN_INTERNET, or
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283 * CONN_IPC */
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149
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284 int suppress_windows_system = 0;
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153
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285 char *display = NULL;
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0
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286 #ifdef INTERNET_DOMAIN_SOCKETS
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151
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287 char *hostarg = NULL; /* remote hostname */
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288 char *remotearg;
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289 char thishost[HOSTNAMSZ]; /* this hostname */
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290 char remotepath[MAXPATHLEN+1]; /* remote pathname */
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291 char *path;
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292 int rflg = 0; /* pathname given on cmdline */
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293 char *portarg;
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294 u_short port = 0; /* port to server */
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0
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295 #endif /* INTERNET_DOMAIN_SOCKETS */
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296 #ifdef SYSV_IPC
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151
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297 struct msgbuf *msgp; /* message */
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0
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298 #endif /* SYSV_IPC */
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299 char *tty;
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151
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300 char buffer[GSERV_BUFSZ + 1]; /* buffer to read pid */
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301 char result[GSERV_BUFSZ + 1];
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302 int i;
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0
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303
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304 #ifdef INTERNET_DOMAIN_SOCKETS
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305 memset (remotepath, 0, sizeof (remotepath));
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306 #endif /* INTERNET_DOMAIN_SOCKETS */
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307
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151
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308 progname = strrchr (argv[0], '/');
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309 if (progname)
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310 ++progname;
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311 else
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312 progname = argv[0];
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0
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313
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149
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314 display = getenv ("DISPLAY");
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315 if (!display)
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316 suppress_windows_system = 1;
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153
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317 else
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318 display = my_strdup (display);
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149
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319
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151
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320 for (i = 1; argv[i] && !errflg; i++)
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321 {
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322 if (*argv[i] != '-')
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0
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323 break;
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153
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324 else if (*argv[i] == '-'
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325 && (*(argv[i] + 1) == '\0'
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326 || (*(argv[i] + 1) == '-' && *(argv[i] + 2) == '\0')))
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327 {
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328 /* `-' or `--' */
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329 ++i;
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330 break;
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331 }
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332
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333 if (!strcmp (argv[i], "-batch") || !strcmp (argv[i], "--batch"))
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151
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334 batch = 1;
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153
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335 else if (!strcmp (argv[i], "-eval") || !strcmp (argv[i], "--eval"))
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151
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336 {
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337 if (!argv[++i])
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338 {
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339 fprintf (stderr, "%s: `-eval' must be followed by an argument\n",
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340 progname);
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341 exit (1);
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342 }
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343 eval_form = argv[i];
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344 }
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153
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345 else if (!strcmp (argv[i], "-display") || !strcmp (argv[i], "--display"))
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151
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346 {
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347 suppress_windows_system = 0;
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348 if (!argv[++i])
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349 {
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153
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350 fprintf (stderr,
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351 "%s: `-display' must be followed by an argument\n",
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151
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352 progname);
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353 exit (1);
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354 }
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153
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355 if (display)
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356 free (display);
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357 /* no need to strdup. */
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151
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358 display = argv[i];
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359 }
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360 else if (!strcmp (argv[i], "-nw"))
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361 suppress_windows_system = 1;
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362 else
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363 {
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364 /* Iterate over one-letter options. */
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365 char *p;
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366 int over = 0;
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367 for (p = argv[i] + 1; *p && !over; p++)
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368 {
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369 switch (*p)
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370 {
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371 case 'q':
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372 quick = 1;
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373 break;
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374 case 'v':
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375 view = 1;
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376 break;
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377 case 'f':
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378 GET_ARGUMENT (eval_function, "-f");
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379 break;
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380 case 'l':
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381 GET_ARGUMENT (load_library, "-l");
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382 break;
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0
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383 #ifdef INTERNET_DOMAIN_SOCKETS
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151
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384 case 'h':
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385 GET_ARGUMENT (hostarg, "-h");
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386 break;
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387 case 'p':
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388 GET_ARGUMENT (portarg, "-p");
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389 port = atoi (portarg);
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390 break;
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391 case 'r':
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392 GET_ARGUMENT (remotearg, "-r");
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393 strcpy (remotepath, remotearg);
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394 rflg = 1;
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395 break;
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0
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396 #endif /* INTERNET_DOMAIN_SOCKETS */
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151
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397 default:
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398 errflg = 1;
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399 }
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400 } /* for */
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401 } /* else */
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402 } /* for */
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0
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403
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404 if (errflg)
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405 {
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406 fprintf (stderr,
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407 #ifdef INTERNET_DOMAIN_SOCKETS
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151
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408 "usage: %s [-nw] [-q] [-v] [-l library] [-f function] [-eval expr]\n"
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|
|
409 " [-h host] [-p port] [-r file-name] [[+line] file] ...\n",
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|
|
410 #else /* !INTERNET_DOMAIN_SOCKETS */
|
|
|
411 "usage: %s [-nw] [-q] [-v] [-l library] [-f function] [-eval expr] "
|
|
0
|
412 "[[+line] path] ...\n",
|
|
|
413 #endif /* !INTERNET_DOMAIN_SOCKETS */
|
|
|
414 progname);
|
|
|
415 exit (1);
|
|
151
|
416 }
|
|
|
417 if (batch && argv[i])
|
|
0
|
418 {
|
|
151
|
419 fprintf (stderr, "%s: Cannot specify `-batch' with file names\n",
|
|
149
|
420 progname);
|
|
|
421 exit (1);
|
|
|
422 }
|
|
153
|
423 if (suppress_windows_system && hostarg)
|
|
|
424 {
|
|
|
425 fprintf (stderr, "%s: Remote editing is available only on X\n",
|
|
|
426 progname);
|
|
|
427 exit (1);
|
|
|
428 }
|
|
|
429
|
|
151
|
430 *result = '\0';
|
|
|
431 if (eval_function || eval_form || load_library)
|
|
|
432 {
|
|
|
433 #if defined(INTERNET_DOMAIN_SOCKETS)
|
|
|
434 connect_type = make_connection (hostarg, port, &s);
|
|
|
435 #else
|
|
|
436 connect_type = make_connection (NULL, (u_short) 0, &s);
|
|
|
437 #endif
|
|
|
438 sprintf (command, "(gnuserv-eval%s '(progn ", quick ? "-quickly" : "");
|
|
|
439 send_string (s, command);
|
|
|
440 if (load_library)
|
|
|
441 {
|
|
|
442 sprintf (command, " (load-library %s)", clean_string (load_library));
|
|
|
443 send_string (s, command);
|
|
|
444 }
|
|
|
445 if (eval_form)
|
|
|
446 {
|
|
|
447 sprintf (command, " %s", eval_form);
|
|
|
448 send_string (s, command);
|
|
|
449 }
|
|
|
450 if (eval_function)
|
|
|
451 {
|
|
|
452 sprintf (command, " (%s)", eval_function);
|
|
|
453 send_string (s, command);
|
|
|
454 }
|
|
|
455 send_string (s, "))");
|
|
|
456 send_string (s, EOT_STR);
|
|
|
457 if (read_line (s, result) == 0)
|
|
|
458 {
|
|
|
459 fprintf (stderr, "%s: Could not read\n", progname);
|
|
|
460 exit (1);
|
|
|
461 }
|
|
|
462 } /* eval_function || eval_form || load_library */
|
|
|
463 else if (batch)
|
|
|
464 {
|
|
|
465 fprintf (stderr, "%s: `-batch' requires an evaluation\n",
|
|
|
466 progname);
|
|
|
467 exit (1);
|
|
|
468 }
|
|
|
469
|
|
|
470 if (!batch)
|
|
|
471 {
|
|
|
472 if (suppress_windows_system)
|
|
|
473 {
|
|
|
474 tty = ttyname (0);
|
|
|
475 if (!tty)
|
|
|
476 {
|
|
|
477 fprintf (stderr, "%s: Not connected to a tty", progname);
|
|
|
478 exit (1);
|
|
|
479 }
|
|
|
480 #if defined(INTERNET_DOMAIN_SOCKETS)
|
|
153
|
481 connect_type = make_connection (hostarg, port, &s);
|
|
151
|
482 #else
|
|
153
|
483 connect_type = make_connection (NULL, (u_short) 0, &s);
|
|
151
|
484 #endif
|
|
153
|
485 send_string (s, "(gnuserv-eval '(emacs-pid))");
|
|
|
486 send_string (s, EOT_STR);
|
|
151
|
487
|
|
153
|
488 if (read_line (s, buffer) == 0)
|
|
|
489 {
|
|
|
490 fprintf (stderr, "%s: Could not establish Emacs procces id\n",
|
|
|
491 progname);
|
|
|
492 exit (1);
|
|
|
493 }
|
|
151
|
494 /* Don't do disconnect_from_server becasue we have already read
|
|
|
495 data, and disconnect doesn't do anything else. */
|
|
|
496 #ifndef INTERNET_DOMAIN_SOCKETS
|
|
153
|
497 if (connect_type == (int) CONN_IPC)
|
|
|
498 disconnect_from_ipc_server (s, msgp, FALSE);
|
|
108
|
499 #endif /* !SYSV_IPC */
|
|
|
500
|
|
153
|
501 emacs_pid = (pid_t)atol(buffer);
|
|
|
502 initialize_signals();
|
|
|
503 } /* suppress_windows_system */
|
|
108
|
504
|
|
151
|
505 #if defined(INTERNET_DOMAIN_SOCKETS)
|
|
|
506 connect_type = make_connection (hostarg, port, &s);
|
|
0
|
507 #else
|
|
151
|
508 connect_type = make_connection (NULL, (u_short) 0, &s);
|
|
0
|
509 #endif
|
|
|
510
|
|
|
511 #ifdef INTERNET_DOMAIN_SOCKETS
|
|
151
|
512 if (connect_type == (int) CONN_INTERNET)
|
|
|
513 {
|
|
|
514 char *ptr;
|
|
|
515 gethostname (thishost, HOSTNAMSZ);
|
|
|
516 if (!rflg)
|
|
|
517 { /* attempt to generate a path
|
|
0
|
518 * to this machine */
|
|
151
|
519 if ((ptr = getenv ("GNU_NODE")) != NULL)
|
|
|
520 /* user specified a path */
|
|
|
521 strcpy (remotepath, ptr);
|
|
|
522 }
|
|
0
|
523 #if 0 /* This is really bogus... re-enable it if you must have it! */
|
|
|
524 #if defined (hp9000s300) || defined (hp9000s800)
|
|
151
|
525 else if (strcmp (thishost,hostarg))
|
|
|
526 { /* try /net/thishost */
|
|
|
527 strcpy (remotepath, "/net/"); /* (this fails using internet
|
|
|
528 addresses) */
|
|
|
529 strcat (remotepath, thishost);
|
|
|
530 }
|
|
0
|
531 #endif
|
|
|
532 #endif
|
|
151
|
533 }
|
|
|
534 else
|
|
|
535 { /* same machines, no need for path */
|
|
|
536 remotepath[0] = '\0'; /* default is the empty path */
|
|
|
537 }
|
|
0
|
538 #endif /* INTERNET_DOMAIN_SOCKETS */
|
|
|
539
|
|
|
540 #ifdef SYSV_IPC
|
|
151
|
541 if ((msgp = (struct msgbuf *)
|
|
|
542 malloc (sizeof *msgp + GSERV_BUFSZ)) == NULL)
|
|
|
543 {
|
|
|
544 fprintf (stderr, "%s: not enough memory for message buffer\n", progname);
|
|
|
545 exit (1);
|
|
|
546 } /* if */
|
|
0
|
547
|
|
151
|
548 msgp->mtext[0] = '\0'; /* ready for later strcats */
|
|
0
|
549 #endif /* SYSV_IPC */
|
|
|
550
|
|
151
|
551 if (suppress_windows_system)
|
|
149
|
552 {
|
|
151
|
553 char *term = getenv ("TERM");
|
|
|
554 if (!term)
|
|
|
555 {
|
|
|
556 fprintf (stderr, "%s: unknown terminal type\n", progname);
|
|
|
557 exit (1);
|
|
|
558 }
|
|
|
559 sprintf (command, "(gnuserv-edit-files '(tty %s %s %d) '(",
|
|
153
|
560 clean_string (tty), clean_string (term), (int)getpid ());
|
|
149
|
561 }
|
|
151
|
562 else /* !suppress_windows_system */
|
|
|
563 {
|
|
|
564 sprintf (command, "(gnuserv-edit-files '(x %s) '(",
|
|
|
565 clean_string (display));
|
|
|
566 } /* !suppress_windows_system */
|
|
|
567 send_string (s, command);
|
|
149
|
568
|
|
151
|
569 if (!argv[i])
|
|
|
570 nofiles = 1;
|
|
0
|
571
|
|
151
|
572 for (; argv[i]; i++)
|
|
0
|
573 {
|
|
151
|
574 if (i < argc - 1 && *argv[i] == '+')
|
|
|
575 starting_line = atoi (argv[i++]);
|
|
|
576 else
|
|
|
577 starting_line = 1;
|
|
|
578 /* If the last argument is +something, treat it as a file. */
|
|
|
579 if (i == argc)
|
|
|
580 {
|
|
|
581 starting_line = 1;
|
|
|
582 --i;
|
|
|
583 }
|
|
|
584 filename_expand (fullpath, argv[i]);
|
|
0
|
585 #ifdef INTERNET_DOMAIN_SOCKETS
|
|
151
|
586 path = malloc (strlen (remotepath) + strlen (fullpath) + 1);
|
|
|
587 sprintf (path, "%s%s", remotepath, fullpath);
|
|
|
588 #else
|
|
153
|
589 path = my_strdup (fullpath);
|
|
0
|
590 #endif
|
|
151
|
591 sprintf (command, "(%d . %s)", starting_line, clean_string (path));
|
|
|
592 send_string (s, command);
|
|
|
593 free (path);
|
|
|
594 } /* for */
|
|
|
595
|
|
|
596 sprintf (command, ")%s%s",
|
|
|
597 (quick || (nofiles && !suppress_windows_system)) ? " 'quick" : "",
|
|
|
598 view ? " 'view" : "");
|
|
149
|
599 send_string (s, command);
|
|
151
|
600 send_string (s, ")");
|
|
0
|
601
|
|
|
602 #ifdef SYSV_IPC
|
|
151
|
603 if (connect_type == (int) CONN_IPC)
|
|
|
604 disconnect_from_ipc_server (s, msgp, FALSE);
|
|
0
|
605 #else /* !SYSV_IPC */
|
|
151
|
606 if (connect_type != (int) CONN_IPC)
|
|
|
607 disconnect_from_server (s, FALSE);
|
|
0
|
608 #endif /* !SYSV_IPC */
|
|
151
|
609 } /* not batch */
|
|
|
610
|
|
|
611 if (batch && !quick)
|
|
|
612 printf ("%s\n", result);
|
|
0
|
613
|
|
78
|
614 return 0;
|
|
0
|
615
|
|
|
616 } /* main */
|
|
|
617
|
|
|
618 #endif /* SYSV_IPC || UNIX_DOMAIN_SOCKETS || INTERNET_DOMAIN_SOCKETS */
|
