1 | /**************************************************************************
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2 | *
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3 | * commands.c -- mgquery command processing functions
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4 | * Copyright (C) 1994 Neil Sharman
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5 | *
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6 | * This program is free software; you can redistribute it and/or modify
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7 | * it under the terms of the GNU General Public License as published by
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8 | * the Free Software Foundation; either version 2 of the License, or
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9 | * (at your option) any later version.
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10 | *
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11 | * This program is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | * GNU General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU General Public License
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17 | * along with this program; if not, write to the Free Software
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18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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19 | *
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20 | * $Id: commands.cpp 711 1999-10-17 23:43:31Z cs025 $
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21 | *
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22 | **************************************************************************/
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23 |
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24 | /*
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25 | $Log$
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26 | Revision 1.2 1999/10/17 23:43:24 cs025
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27 | Changes to eradicate Xmalloc
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28 |
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29 | Revision 1.1 1999/10/11 02:57:08 cs025
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30 | Base install of MG-PP
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31 |
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32 | Revision 1.1 1999/08/10 21:17:47 sjboddie
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33 | renamed mg-1.3d directory mg
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34 |
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35 | Revision 1.1 1998/11/17 09:34:32 rjmcnab
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36 | *** empty log message ***
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37 |
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38 | * Revision 1.2 1994/09/20 04:41:22 tes
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39 | * For version 1.1
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40 | *
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41 | */
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42 |
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43 | static char *RCSID = "$Id: commands.cpp 711 1999-10-17 23:43:31Z cs025 $";
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44 |
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45 | #include <stdio.h>
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46 |
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47 | #include "non_ansi.h"
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48 |
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49 | #include "sysfuncs.h"
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50 | #include "memlib.h"
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51 | #include "messages.h"
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52 |
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53 | #include "environment.h"
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54 | #include "mg.h"
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55 | #include "locallib.h"
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56 | #include "backend.h" /* for qd */
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57 | #include "term_lists.h" /* for MAXTERMSTRLEN */
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58 |
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59 | /* [RPAP - Feb 97: WIN32 Port] */
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60 | #ifdef __WIN32__
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61 | # define OPENPIPE _popen
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62 | # define CLOSEPIPE _pclose
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63 | #else
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64 | # define OPENPIPE popen
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65 | # define CLOSEPIPE pclose
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66 | #endif
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67 |
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68 | extern char *PathName;
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69 | extern FILE *OutFile, *InFile;
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70 | extern int OutPipe, InPipe;
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71 | extern int Quitting;
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72 |
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73 | char *CommandsErrorStr = NULL;
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74 |
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75 | /* [TS: June/95] */
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76 | /* current qd for use by any commands */
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77 | static query_data *the_qd = NULL;
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78 |
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79 |
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80 | #include "help.mg.h"
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81 | #include "warranty.h"
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82 | #include "conditions.h"
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83 |
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84 | static void
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85 | CmdQuit (void)
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86 | {
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87 | Quitting = 1;
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88 | }
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89 |
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90 | static void
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91 | CmdPush (void)
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92 | {
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93 | PushEnv ();
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94 | }
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95 |
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96 |
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97 | static void
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98 | CmdPop (void)
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99 | {
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100 | PopEnv ();
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101 | if (EnvStackHeight () == 1)
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102 | PushEnv ();
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103 | }
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104 |
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105 | static void
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106 | CmdHelp (void)
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107 | {
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108 | FILE *more;
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109 | int i;
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110 |
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111 | if (!(more = OPENPIPE (GetDefEnv ("pager", "more"), "w"))) /* [RPAP - Feb 97: WIN32 Port] */
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112 | {
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113 | fprintf (stderr, "ERROR : Unable to run more\n");
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114 | return;
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115 | }
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116 | for (i = 0; i < sizeof (help_str) / sizeof (help_str[0]); i++)
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117 | fputs (help_str[i], more);
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118 |
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119 | CLOSEPIPE (more); /* [RPAP - Feb 97: WIN32 Port] */
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120 | }
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121 |
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122 |
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123 | static void
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124 | CmdWarranty (void)
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125 | {
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126 | FILE *more;
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127 | int i;
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128 |
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129 | if (!(more = OPENPIPE (GetDefEnv ("pager", "more"), "w"))) /* [RPAP - Feb 97: WIN32 Port] */
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130 | {
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131 | fprintf (stderr, "ERROR : Unable to run more\n");
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132 | return;
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133 | }
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134 | for (i = 0; i < sizeof (warranty_str) / sizeof (warranty_str[0]); i++)
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135 | fputs (warranty_str[i], more);
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136 |
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137 | CLOSEPIPE (more); /* [RPAP - Feb 97: WIN32 Port] */
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138 | }
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139 |
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140 |
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141 | static void
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142 | CmdConditions (void)
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143 | {
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144 | FILE *more;
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145 | int i;
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146 |
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147 | if (!(more = OPENPIPE (GetDefEnv ("pager", "more"), "w"))) /* [RPAP - Feb 97: WIN32 Port] */
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148 | {
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149 | fprintf (stderr, "ERROR : Unable to run more\n");
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150 | return;
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151 | }
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152 | for (i = 0; i < sizeof (cond_str) / sizeof (cond_str[0]); i++)
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153 | fputs (cond_str[i], more);
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154 |
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155 | CLOSEPIPE (more);
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156 | }
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157 |
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158 | static void
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159 | CmdReset (void)
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160 | {
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161 | while (EnvStackHeight () > 1)
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162 | PopEnv ();
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163 | PushEnv ();
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164 | }
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165 |
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166 | static void
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167 | CmdDisplay (void)
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168 | {
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169 | int i;
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170 | size_t l = 0;
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171 | char *name;
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172 | for (i = 0; (name = GetEnvName (i)) != NULL; i++)
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173 | if (strlen (name) > l)
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174 | l = strlen (name);
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175 |
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176 | for (i = 0; (name = GetEnvName (i)) != NULL; i++)
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177 | printf ("%-*s = \"%s\"\n", (int) l, name, GetEnv (name));
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178 | }
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179 |
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180 | static void
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181 | CmdQueryTerms (void)
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182 | {
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183 | static char terms_str[MAXTERMSTRLEN + 1];
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184 |
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185 | if (the_qd && the_qd->TL)
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186 | {
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187 | TermList_toString (the_qd->TL, terms_str);
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188 | printf ("%s\n", terms_str);
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189 | fflush (stdout);
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190 | }
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191 |
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192 | }
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193 |
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194 |
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195 | static void
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196 | CmdSet (char *name, char *value)
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197 | {
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198 | if (!*name)
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199 | {
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200 | CommandsErrorStr = "Blank names are not permitted";
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201 | return;
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202 | }
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203 | switch (SetEnv (name, value, NULL))
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204 | {
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205 | case -1:
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206 | CommandsErrorStr = "Out of memory\n";
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207 | break;
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208 | case -2:
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209 | CommandsErrorStr = ConstraintErrorStr;
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210 | break;
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211 | }
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212 | }
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213 |
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214 | static void
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215 | CmdUnset (char *name)
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216 | {
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217 | if (!*name)
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218 | {
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219 | CommandsErrorStr = "Blank names are not permitted";
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220 | return;
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221 | }
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222 | if (UnsetEnv (name, 0) == -1)
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223 | CommandsErrorStr = "Specified name does not exist";
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224 | }
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225 |
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226 |
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227 |
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228 |
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229 |
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230 |
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231 | /*
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232 | * Do the .input command
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233 | */
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234 | static void
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235 | CmdInput (char *param1, char *param2)
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236 | {
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237 | enum
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238 | {
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239 | READ, APPEND, PIPEFROM
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240 | }
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241 | mode;
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242 | FILE *NewInput;
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243 | char *buf, *s;
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244 |
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245 | /* join the two parameters together */
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246 | buf = new char[strlen (param1) + strlen (param2) + 1];
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247 | strcpy (buf, param1);
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248 | strcat (buf, param2);
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249 | s = buf;
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250 |
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251 |
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252 | while (*s == ' ' || *s == '\t')
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253 | s++;
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254 |
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255 | if (*s == '<')
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256 | {
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257 | s++;
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258 | mode = READ;
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259 | }
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260 | else if (*s == '|')
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261 | {
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262 | mode = PIPEFROM;
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263 | s++;
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264 | }
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265 | else
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266 | {
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267 | if (InPipe)
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268 | CLOSEPIPE (InFile); /* [RPAP - Feb 97: WIN32 Port] */
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269 | else if (InFile != stdin)
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270 | fclose (InFile);
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271 | InPipe = 0;
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272 | InFile = stdin;
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273 | delete buf;
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274 | return;
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275 | }
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276 |
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277 | while (*s == ' ' || *s == '\t')
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278 | s++;
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279 |
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280 | if (*s)
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281 | {
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282 | if (mode == READ)
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283 | NewInput = fopen (s, "r");
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284 | else
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285 | NewInput = OPENPIPE (s, "r"); /* [RPAP - Feb 97: WIN32 Port] */
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286 |
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287 | if (NewInput)
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288 | {
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289 | if (InPipe)
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290 | CLOSEPIPE (InFile); /* [RPAP - Feb 97: WIN32 Port] */
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291 | else if (InFile != stdin)
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292 | fclose (InFile);
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293 | InPipe = (mode == PIPEFROM);
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294 | InFile = NewInput;
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295 | }
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296 | else
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297 | CommandsErrorStr = "Bad input file/pipe";
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298 | }
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299 | else
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300 | {
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301 | if (InPipe)
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302 | CLOSEPIPE (InFile); /* [RPAP - Feb 97: WIN32 Port] */
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303 | else if (InFile != stdin)
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304 | fclose (InFile);
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305 | InPipe = 0;
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306 | InFile = stdin;
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307 | }
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308 | delete buf;
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309 | }
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310 |
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311 |
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312 |
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313 | static void
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314 | CmdOutput (char *param1, char *param2)
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315 | {
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316 | enum
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317 | {
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318 | WRITE, APPEND, PIPETO
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319 | }
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320 | mode;
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321 | char *buf, *s;
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322 | FILE *NewOutput;
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323 |
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324 | /* join the two parameters together */
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325 | buf = new char[strlen (param1) + strlen (param2) + 1];
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326 | strcpy (buf, param1);
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327 | strcat (buf, param2);
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328 | s = buf;
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329 |
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330 | while (*s == ' ' || *s == '\t')
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331 | s++;
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332 |
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333 | if (*s == '>')
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334 | {
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335 | s++;
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336 | mode = APPEND;
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337 | if (*s == '>')
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338 | s++;
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339 | else
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340 | mode = WRITE;
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341 | }
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342 | else if (*s == '|')
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343 | {
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344 | mode = PIPETO;
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345 | s++;
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346 | }
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347 | else
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348 | {
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349 | if (OutPipe)
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350 | CLOSEPIPE (OutFile); /* [RPAP - Feb 97: WIN32 Port] */
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351 | else if (OutFile != stdout)
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352 | fclose (OutFile);
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353 | OutPipe = 0;
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354 | OutFile = stdout;
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355 | delete buf;
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356 | return;
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357 | }
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358 |
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359 | while (*s == ' ' || *s == '\t')
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360 | s++;
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361 |
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362 | if (*s)
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363 | {
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364 | if (mode == PIPETO)
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365 | NewOutput = OPENPIPE (s, "w"); /* [RPAP - Feb 97: WIN32 Port] */
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366 | else
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367 | NewOutput = fopen (s, mode == WRITE ? "w" : "a");
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368 | if (NewOutput)
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369 | {
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370 | if (OutPipe)
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371 | CLOSEPIPE (OutFile); /* [RPAP - Feb 97: WIN32 Port] */
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372 | else if (OutFile != stdout)
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373 | fclose (OutFile);
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374 | OutPipe = (mode == PIPETO);
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375 | OutFile = NewOutput;
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376 | }
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377 | else
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378 | CommandsErrorStr = "Bad output file/pipe";
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379 | }
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380 | else
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381 | {
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382 | if (OutPipe)
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383 | CLOSEPIPE (OutFile); /* [RPAP - Feb 97: WIN32 Port] */
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384 | else if (OutFile != stdout)
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385 | fclose (OutFile);
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386 | OutPipe = 0;
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387 | OutFile = stdout;
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388 | }
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389 | delete buf;
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390 | }
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391 |
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392 |
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393 |
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394 | static char *
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395 | ParseArg (char *line, char *buffer)
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396 | {
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397 | if (*line == '\"')
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398 | {
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399 | line++;
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400 | while (*line != '\"' && *line != '\0')
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401 | {
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402 | if (*line == '\\')
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403 | *buffer++ = *line++;
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404 | if (*line != '\0')
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405 | *buffer++ = *line++;
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406 | }
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407 | if (*line == '\"')
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408 | line++;
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409 | }
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410 | else
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411 | while (*line != ' ' && *line != '\t' && *line != '\0')
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412 | {
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413 | if (*line == '\\')
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414 | line++;
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415 | if (*line != '\0')
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416 | *buffer++ = *line++;
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417 | }
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418 | *buffer = '\0';
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419 | while (*line == ' ' || *line == '\t')
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420 | line++;
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421 | return (line);
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422 | }
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423 |
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424 |
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425 |
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426 | char *
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427 | ProcessCommands (char *line, query_data * qd)
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428 | {
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429 | struct
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430 | {
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431 | char *Command;
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432 | void (*action) (void);
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433 | void (*action1) (char *);
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434 | void (*action2) (char *, char *);
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435 | }
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436 | *dc, dot_command[] =
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437 | {
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438 | {
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439 | "set", NULL, NULL, CmdSet
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440 | }
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441 | ,
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442 | {
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443 | "input", NULL, NULL, CmdInput
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444 | }
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445 | ,
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446 | {
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447 | "output", NULL, NULL, CmdOutput
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448 | }
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449 | ,
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450 | {
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451 | "unset", NULL, CmdUnset, NULL
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452 | }
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453 | ,
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454 | {
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455 | "help", CmdHelp, NULL, NULL
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456 | }
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457 | ,
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458 | {
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459 | "reset", CmdReset, NULL, NULL
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460 | }
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461 | ,
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462 | {
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463 | "display", CmdDisplay, NULL, NULL
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464 | }
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465 | ,
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466 | {
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467 | "push", CmdPush, NULL, NULL
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468 | }
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469 | ,
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470 | {
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471 | "quit", CmdQuit, NULL, NULL
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472 | }
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473 | ,
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474 | {
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475 | "pop", CmdPop, NULL, NULL
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476 | }
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477 | ,
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478 | {
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479 | "warranty", CmdWarranty, NULL, NULL
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480 | }
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481 | ,
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482 | {
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483 | "conditions", CmdConditions, NULL, NULL
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484 | }
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485 | ,
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486 | {
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487 | "queryterms", CmdQueryTerms, NULL, NULL
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488 | }
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489 | };
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490 |
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491 |
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492 | char command[512];
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493 | char param1[512], param2[512];
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494 | CommandsErrorStr = NULL;
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495 | the_qd = qd; /* set globally to be accessed by command functions if needed */
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496 | while (*line == ' ' || *line == '\t')
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497 | line++;
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498 | while (*line == '.')
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499 | {
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500 | int i;
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501 | line++;
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502 | for (i = 0; isalpha (*line) && i < 512; i++, line++)
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503 | command[i] = tolower (*line);
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504 | while (*line == ' ' || *line == '\t')
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505 | line++;
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506 | if (i != 512)
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507 | {
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508 | command[i] = '\0';
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509 | for (i = 0, dc = dot_command; i < NUMOF (dot_command); i++, dc++)
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510 | if (!strcmp (dc->Command, command))
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511 | {
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512 | if (dc->action)
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513 | dc->action ();
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514 | else if (dc->action1)
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515 | {
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516 | line = ParseArg (line, param1);
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517 | dc->action1 (param1);
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518 | break;
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519 | }
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520 | else if (dc->action2)
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521 | {
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522 | line = ParseArg (line, param1);
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523 | line = ParseArg (line, param2);
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524 | dc->action2 (param1, param2);
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525 | break;
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526 | }
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527 | if (CommandsErrorStr)
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528 | *line = '\0';
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529 | break;
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530 | }
|
---|
531 | if (i == NUMOF (dot_command))
|
---|
532 | i = 100;
|
---|
533 | }
|
---|
534 | if (i == 100)
|
---|
535 | {
|
---|
536 | CommandsErrorStr = "Illegal command";
|
---|
537 | *line = '\0';
|
---|
538 | }
|
---|
539 | while (*line == ' ' || *line == '\t')
|
---|
540 | line++;
|
---|
541 | }
|
---|
542 | return (line);
|
---|
543 | }
|
---|
544 |
|
---|
545 |
|
---|
546 |
|
---|
547 |
|
---|
548 |
|
---|
549 | void
|
---|
550 | read_mgrc_file (void)
|
---|
551 | {
|
---|
552 | char line[1000];
|
---|
553 | char FileName[256];
|
---|
554 | int LineNum = 0;
|
---|
555 | FILE *mgrc;
|
---|
556 |
|
---|
557 | strcpy (FileName, ".mgrc");
|
---|
558 | mgrc = fopen (FileName, "r");
|
---|
559 |
|
---|
560 | if (!mgrc)
|
---|
561 | {
|
---|
562 | char *home_path = getenv ("HOME");
|
---|
563 | if (home_path)
|
---|
564 | {
|
---|
565 | sprintf (FileName, "%s/.mgrc", home_path);
|
---|
566 | mgrc = fopen (FileName, "r");
|
---|
567 | }
|
---|
568 | }
|
---|
569 |
|
---|
570 | if (!mgrc)
|
---|
571 | return;
|
---|
572 |
|
---|
573 | while (fgets (line, sizeof (line), mgrc))
|
---|
574 | {
|
---|
575 | char *s, linebuf[1000];
|
---|
576 | LineNum++;
|
---|
577 | if ((s = strchr (line, '\n')) != NULL)
|
---|
578 | *s = '\0';
|
---|
579 | strcpy (linebuf, line);
|
---|
580 | if ((s = strchr (line, '#')) != NULL)
|
---|
581 | *s = '\0';
|
---|
582 | if (!*line)
|
---|
583 | continue;
|
---|
584 | ProcessCommands (line, NULL);
|
---|
585 | if (CommandsErrorStr)
|
---|
586 | Message ("%s\n%s : ERROR in line %d of %s\n%s : %s\n",
|
---|
587 | linebuf,
|
---|
588 | msg_prefix, LineNum, FileName,
|
---|
589 | msg_prefix, CommandsErrorStr);
|
---|
590 | }
|
---|
591 | fclose (mgrc);
|
---|
592 | }
|
---|