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1 /* -*-C-*-
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2
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3 Header file for the GNU Emacs server and client C code.
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4
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5 This file is part of GNU Emacs.
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6
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7 Copying is permitted under those conditions described by the GNU
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8 General Public License.
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9
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10 Copyright (C) 1989 Free Software Foundation, Inc.
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11
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12 Author: Andy Norman (ange@hplb.hpl.hp.com), based on
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13 'etc/server.c' and 'etc/emacsclient.c' from the 18.52 GNU
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14 Emacs distribution.
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15
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16 Please mail bugs and suggestions to the author at the above address.
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17 */
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18
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19 /* HISTORY
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20 * 11-Nov-1990 bristor@simba
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21 * Added EOT stuff.
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22 */
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23
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24 /*
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25 * This file incorporates new features added by Bob Weiner <weiner@mot.com>,
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26 * Darrell Kindred <dkindred@cmu.edu> and Arup Mukherjee <arup@cmu.edu>.
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27 * Please see the note at the end of the README file for details.
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28 *
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29 * (If gnuserv came bundled with your emacs, the README file is probably
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30 * ../etc/gnuserv.README relative to the directory containing this file)
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31 */
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32
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33 #if 0
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34 static char header_rcsid [] = "!Header: gnuserv.h,v 2.4 95/02/16 11:58:11 arup alpha !";
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35 #endif
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36
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37 #define NO_SHORTNAMES
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38
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39 #define PATCHLEVEL 2
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40
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41 #define NO_SHORTNAMES
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42 /* gnuserv should not be compiled using SOCKS */
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43 #define DO_NOT_SOCKSIFY
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44 #include <../src/config.h>
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45 #undef read
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46 #undef write
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47 #undef open
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48 #undef close
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49 #undef signal
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50
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51 /* Define the communication method between server and clients:
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52 * You can have either or both kinds of sockets, but you can't mix
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53 * sockets with sysv ipc
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54 */
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55
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56
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57 #define INTERNET_DOMAIN_SOCKETS
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58 #define UNIX_DOMAIN_SOCKETS
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59 /* #define SYSV_IPC */
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60
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61 /*
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62 * Define additional authentication protocols to be used. These methods will
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63 * be tried before falling back to the default gnuserv protocol (based on
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64 * the GNU_SECURE environment variable). Currently, only MIT-MAGIC-COOKIE-1
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65 * is also supported.
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66 *
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67 * Comment out the next line(s) if you don't want to enable the
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68 * appropriate authentication protocol.
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69 */
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70
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71 #if defined (HAVE_XAUTH)
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72 #define AUTH_MAGIC_COOKIE
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73 #endif /* HAVE_XAUTH */
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74
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75 /*
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76 * stuff related to supporting MIT-MAGIC-COOKIE-1
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77 */
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78
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79 #define MCOOKIE_SCREEN "999" /* screen # to use as the gnuserv cookie */
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80 #define MCOOKIE_NAME "MAGIC-1" /* authentication protocol name */
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81 #define MCOOKIE_X_NAME "MIT-MAGIC-COOKIE-1" /* as needed by X */
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82
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83
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84 #define DEFAUTH_NAME "GNU-SECURE" /* name of default auth protocol */
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85 #define AUTH_TIMEOUT 15 /* # seconds to wait for auth data */
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86 #define AUTH_NAMESZ 15 /* max allows auth protocol name size */
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87
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88
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89 /*
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90 * Pick a default communication scheme, if none was specified.
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91 */
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92
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93 #if !defined(SYSV_IPC) && !defined(UNIX_DOMAIN_SOCKETS) && !defined(INTERNET_DOMAIN_SOCKETS)
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94
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95 #ifdef HAVE_SYSVIPC
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96 #define SYSV_IPC /* SYSV systems use SYSV IPC by default */
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97 #endif /* HAVE_SYSVIPC */
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98
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99 #ifdef BSD
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100 #define UNIX_DOMAIN_SOCKETS /* BSD systems use Unix Domain sockets by default */
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101 #endif /* BSD */
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102
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103 #endif /* No communication method pre-defined */
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104
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105 #include <sys/types.h>
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106 #include <sys/param.h>
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107 #include <sys/stat.h>
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108 #include <stdio.h>
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109 #ifdef STDC_HEADERS
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110 #include <stdlib.h>
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111 #include <string.h>
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112 #endif /* STDC_HEADERS */
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113 #include <signal.h>
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114 #include <errno.h>
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115
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116 #ifdef HAVE_UNISTD_H
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117 #include <unistd.h>
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118 #endif
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119
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120 #ifdef HAVE_SYS_TIME_H
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121 #include <sys/time.h>
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122 #endif
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123
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124 /*
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125 * If you are using SYSV_IPC, you might want to make the buffer size bigger
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126 * since it limits the size of requests and responses. Don't make it bigger
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127 * than your system's max message size though (usually a couple of k) or else
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128 * msgsend will start failing. For sockets, using the system BUFSIZ is usually
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129 * what you want.
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130 */
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131
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132 # define GSERV_BUFSZ BUFSIZ
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133
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134
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135 #ifdef SYSV_IPC
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136 #include <sys/ipc.h>
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137 #include <sys/msg.h>
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138
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139 #define send_string(s,str) \
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140 if (strlen(msgp->mtext) + strlen(str) < GSERV_BUFSZ) \
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141 strcat(msgp->mtext,str); \
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142 else \
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143 { \
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144 fprintf(stderr,"%s: not enough message buffer space\n",progname); \
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145 exit(1); \
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146 } \
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147
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148 #endif /* SYSV_IPC */
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149
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150 #if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
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151 #include <sys/socket.h>
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152 #endif /* INTERNET_DOMAIN_SOCKETS || UNIX_DOMAIN_SOCKETS */
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153
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154 #ifdef INTERNET_DOMAIN_SOCKETS
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155 #include <netdb.h>
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156 #include <netinet/in.h>
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157 #include <arpa/inet.h>
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158 #define TABLE_SIZE 101 /* The number of entries in the hash table */
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159 #define HASH(host) host /* Rather simplistic hash function */
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160 #define DEFAULT_PORT 21490 /* default port number to use is
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161 * DEFAULT_PORT + uid */
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162 #endif /* INTERNET_DOMAIN_SOCKETS */
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163
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164 #ifdef UNIX_DOMAIN_SOCKETS
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165 #include <sys/un.h>
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166 #define HIDE_UNIX_SOCKET /* put the unix socket in a protected dir */
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167 #endif /* UNIX_DOMAIN_SOCKETS */
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168
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169 /* On some platforms, we need to do the equivalent of "stty litout" to get
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170 * characters like ^D to pass through to emacs. This problem has only
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171 * been observed under emacs18; fsf19 and lemacs are probably okay without it.
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172 */
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173 #ifndef DONT_USE_LITOUT
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174 #if !defined(HAVE_TERMIO) && !defined(HAVE_TERMIOS) && !defined(VMS)
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175 #if !defined(MSDOS) && !defined(BSD4_1)
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176 #define USE_LITOUT
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177 #endif
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178 #endif
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179 #endif
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180
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181
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182 #define HOSTNAMSZ 255 /* max size of a hostname */
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183 #define REPLYSIZ 300 /* max size of reply from server to client */
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184 #undef FALSE
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185 #define FALSE 0
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186 #undef TRUE
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187 #define TRUE 1
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188
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189 extern char *optarg;
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190 extern int optind;
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191 extern char *progname;
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192
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193 /* The casts shut Sun's compiler up and are safe in the context these
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194 are actually used. */
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195 #define max2(x,y) (((int) (x) > (int) (y)) ? (x) : (y))
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196 #define min2(x,y) (((int) (x) < (int) (y)) ? (x) : (y))
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197
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198 #ifndef _NFILE /* rough guess at maximum number of open files */
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199 #define _NFILE 20
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200 #endif
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201
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202 #define EOT_STR "\004"
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203 #define EOT_CHR '\004'
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204
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205 /* connection types */
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206 #define CONN_UNIX 0
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207 #define CONN_INTERNET 1
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208 #define CONN_IPC 2
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209
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210 /* function declarations */
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211 extern int make_connection (char *hostarg, int portarg, int *s);
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212 #ifdef SYSV_IPC
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213 extern void disconnect_from_ipc_server();
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214 #endif
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215 #if defined(INTERNET_DOMAIN_SOCKETS) || defined(UNIX_DOMAIN_SOCKETS)
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216 extern void send_string (int s, CONST char *msg);
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217 extern void disconnect_from_server (int s, int echo);
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218 #endif
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219 #ifdef INTERNET_DOMAIN_SOCKETS
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220 extern int internet_addr (char *host);
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221 #endif
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