Mercurial > hg > early-roguelike
annotate rogue4/mach_dep.c @ 12:9535a08ddc39
Import Rogue 5.2 from the Roguelike Restoration Project (r1490)
author | edwarj4 |
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date | Sat, 24 Oct 2009 16:52:52 +0000 |
parents | |
children | 63b9fd7d70ce |
rev | line source |
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12
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1 /* |
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2 * Various installation dependent routines |
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3 * |
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4 * @(#)mach_dep.c 4.23 (Berkeley) 5/19/82 |
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5 * |
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6 * Rogue: Exploring the Dungeons of Doom |
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7 * Copyright (C) 1980, 1981, 1982 Michael Toy, Ken Arnold and Glenn Wichman |
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8 * All rights reserved. |
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9 * |
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10 * See the file LICENSE.TXT for full copyright and licensing information. |
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11 */ |
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12 |
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13 /* |
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14 * The various tuneable defines are: |
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15 * |
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16 * SCOREFILE Where/if the score file should live. |
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17 * MAXLOAD What (if any) the maximum load average should be |
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18 * when people are playing. If defined, then |
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19 * LOADAV Should rogue define it's own routine to |
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20 * get the load average? |
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21 * NAMELIST If so, where does the system namelist hide? |
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22 * MAXUSERS What (if any) the maximum user count should be |
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23 * when people are playing. If defined, then |
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24 * UCOUNT Should rogue define it's own routine to |
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25 * count users? |
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26 * UTMP If so, where does the user list hide? |
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27 * CHECKTIME How often/if rogue should check during the game |
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28 * for high load average. |
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29 */ |
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30 |
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31 #include <limits.h> |
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32 #include <stdlib.h> |
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33 #include <stdio.h> |
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34 #include <curses.h> |
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35 #include <time.h> |
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36 #include <signal.h> |
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37 #include <sys/stat.h> |
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38 #include <fcntl.h> |
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39 #include <string.h> |
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40 #include "rogue.h" |
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41 |
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42 int num_checks; /* times we've gone over in checkout() */ |
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43 |
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44 #ifdef SCOREFILE |
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45 #ifdef LOCKFILE |
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46 static char *lockfile = LOCKFILE; |
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47 #endif |
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48 #endif |
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49 |
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50 /* |
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51 * init_check: |
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52 * Check out too see if it is proper to play the game now |
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53 */ |
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54 init_check() |
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55 { |
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56 if (too_much()) |
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57 { |
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58 printf("Sorry, %s, but the system is too loaded now.\n", whoami); |
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59 printf("Try again later. Meanwhile, why not enjoy a%s %s?\n", |
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60 vowelstr(fruit), fruit); |
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61 if (author()) |
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62 printf("However, since you're a good guy, it's up to you\n"); |
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63 else |
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64 exit(1); |
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65 } |
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66 } |
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67 |
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68 /* |
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69 * open_score: |
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70 * Open up the score file for future use, and then |
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71 * setuid(getuid()) in case we are running setuid. |
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72 */ |
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73 open_score() |
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74 { |
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75 #ifdef SCOREFILE |
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76 fd = open(SCOREFILE, O_RDWR | O_CREAT, 0666 ); |
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77 #else |
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78 fd = -1; |
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79 #endif |
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80 md_normaluser(); |
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81 } |
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82 |
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83 /* |
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84 * setup: |
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85 * Get starting setup for all games |
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86 */ |
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87 setup() |
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88 { |
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89 void auto_save(), quit(), endit(), tstp(); |
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90 #ifdef CHECKTIME |
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91 int checkout(); |
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92 #endif |
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93 |
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94 /* |
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95 * make sure that large terminals don't overflow the bounds |
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96 * of the program |
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97 */ |
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98 if (LINES > MAXLINES) |
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99 LINES = MAXLINES; |
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100 if (COLS > MAXCOLS) |
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101 COLS = MAXCOLS; |
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102 |
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103 #ifdef SIGHUP |
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104 signal(SIGHUP, auto_save); |
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105 #endif |
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106 #ifndef DUMP |
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107 signal(SIGILL, auto_save); |
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108 #ifdef SIGTRAP |
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109 signal(SIGTRAP, auto_save); |
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110 #endif |
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111 #ifdef SIGIOT |
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112 signal(SIGIOT, auto_save); |
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113 #endif |
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114 #ifdef SIGEMT |
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115 signal(SIGEMT, auto_save); |
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116 #endif |
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117 signal(SIGFPE, auto_save); |
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118 #ifdef SIGBUS |
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119 signal(SIGBUS, auto_save); |
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120 #endif |
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121 signal(SIGSEGV, auto_save); |
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122 #ifdef SIGSYS |
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123 signal(SIGSYS, auto_save); |
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124 #endif |
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125 signal(SIGTERM, auto_save); |
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126 #endif |
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127 |
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128 signal(SIGINT, quit); |
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129 #ifndef DUMP |
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130 #ifdef SIGQUIT |
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131 signal(SIGQUIT, endit); |
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132 #endif |
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133 #endif |
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134 #ifdef CHECKTIME |
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135 signal(SIGALRM, checkout); |
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136 alarm(CHECKTIME * 60); |
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137 num_checks = 0; |
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138 #endif |
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139 crmode(); /* Cbreak mode */ |
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140 noecho(); /* Echo off */ |
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141 } |
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142 |
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143 /* |
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144 * start_score: |
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145 * Start the scoring sequence |
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146 */ |
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147 start_score() |
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148 { |
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149 #ifdef SIGALRM |
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150 signal(SIGALRM, SIG_IGN); |
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151 #endif |
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152 } |
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153 |
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154 /* |
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155 * issymlink: |
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156 * See if the file has a symbolic link |
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157 */ |
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158 issymlink(sp) |
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159 char *sp; |
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160 { |
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161 #ifdef S_IFLNK |
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162 struct stat sbuf2; |
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163 |
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164 if (lstat(sp, &sbuf2) < 0) |
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165 return FALSE; |
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166 else |
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167 return ((sbuf2.st_mode & S_IFMT) != S_IFREG); |
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168 #else |
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169 return FALSE; |
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170 #endif |
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171 } |
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172 |
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173 /* |
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174 * too_much: |
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175 * See if the system is being used too much for this game |
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176 */ |
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177 too_much() |
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178 { |
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179 #ifdef MAXLOAD |
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180 double avec[3]; |
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181 |
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182 if (md_getloadavg(avec) == 0) |
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183 if (avec[2] > (MAXLOAD / 10.0)) |
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184 return(1); |
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185 #endif |
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186 #ifdef MAXUSERS |
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187 if (md_ucount() > MAXUSERS) |
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188 return(1) ; |
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189 #endif |
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190 return(0); |
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191 } |
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192 |
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193 /* |
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194 * author: |
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195 * See if a user is an author of the program |
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196 */ |
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197 author() |
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198 { |
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199 #ifdef WIZARD |
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200 if (wizard) |
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201 return TRUE; |
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202 #endif |
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203 switch (md_getuid()) |
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204 { |
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205 case 0: |
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206 return TRUE; |
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207 default: |
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208 return FALSE; |
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209 } |
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210 } |
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211 |
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212 /* |
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213 * checkout: |
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214 * Check each CHECKTIME seconds to see if the load is too high |
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215 */ |
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216 void |
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217 checkout(int s) |
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218 { |
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219 static char *msgs[] = { |
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220 "The load is too high to be playing. Please leave in %0.1f minutes", |
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221 "Please save your game. You have %0.1f minutes", |
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222 "Last warning. You have %0.1f minutes to leave", |
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223 }; |
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224 int checktime = 0; |
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225 |
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226 #ifdef SIGALRM |
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227 signal(SIGALRM, checkout); |
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228 #endif |
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229 |
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230 if (too_much()) |
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231 { |
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232 if (author()) |
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233 { |
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234 num_checks = 1; |
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235 chmsg("The load is rather high, O exaulted one"); |
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236 } |
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237 else if (num_checks++ == 3) |
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238 fatal("Sorry. You took to long. You are dead\n"); |
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239 |
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240 #ifdef CHECKTIME |
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241 checktime = (CHECKTIME * 60) / num_checks; |
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242 #endif |
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243 #ifdef SIGALRM |
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244 alarm(checktime); |
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245 #endif |
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246 |
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247 chmsg(msgs[num_checks - 1], ((double) checktime / 60.0)); |
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248 } |
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249 else |
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250 { |
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251 if (num_checks) |
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252 { |
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253 num_checks = 0; |
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254 chmsg("The load has dropped back down. You have a reprieve"); |
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255 } |
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256 #ifdef CHECKTIME |
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257 #ifdef SIGALRM |
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258 alarm(CHECKTIME * 60); |
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259 #endif |
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260 #endif |
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261 } |
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262 } |
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263 |
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264 /* |
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265 * chmsg: |
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266 * checkout()'s version of msg. If we are in the middle of a |
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267 * shell, do a printf instead of a msg to avoid the refresh. |
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268 */ |
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269 chmsg(fmt, arg) |
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270 char *fmt; |
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271 int arg; |
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272 { |
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273 if (in_shell) |
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274 { |
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275 printf(fmt, arg); |
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276 putchar('\n'); |
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277 fflush(stdout); |
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278 } |
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279 else |
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280 msg(fmt, arg); |
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281 } |
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282 |
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283 /* |
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284 * lock_sc: |
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285 * lock the score file. If it takes too long, ask the user if |
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286 * they care to wait. Return TRUE if the lock is successful. |
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287 */ |
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288 lock_sc() |
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289 { |
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290 #ifdef SCOREFILE |
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291 #ifdef LOCKFILE |
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292 register int cnt; |
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293 static struct stat sbuf; |
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294 |
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295 over: |
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296 if (creat(lockfile, 0000) > 0) |
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297 return TRUE; |
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298 for (cnt = 0; cnt < 5; cnt++) |
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299 { |
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300 md_sleep(1); |
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301 if (creat(lockfile, 0000) > 0) |
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302 return TRUE; |
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303 } |
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304 if (stat(lockfile, &sbuf) < 0) |
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305 { |
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306 creat(lockfile, 0000); |
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307 return TRUE; |
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308 } |
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309 if (time(NULL) - sbuf.st_mtime > 10) |
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310 { |
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311 if (md_unlink(lockfile) < 0) |
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312 return FALSE; |
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313 goto over; |
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314 } |
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315 else |
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316 { |
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317 printf("The score file is very busy. Do you want to wait longer\n"); |
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318 printf("for it to become free so your score can get posted?\n"); |
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319 printf("If so, type \"y\"\n"); |
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320 fgets(prbuf, MAXSTR, stdin); |
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321 if (prbuf[0] == 'y') |
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322 for (;;) |
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323 { |
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324 if (creat(lockfile, 0000) > 0) |
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325 return TRUE; |
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326 if (stat(lockfile, &sbuf) < 0) |
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327 { |
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328 creat(lockfile, 0000); |
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329 return TRUE; |
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330 } |
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331 if (time(NULL) - sbuf.st_mtime > 10) |
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332 { |
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333 if (md_unlink(lockfile) < 0) |
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334 return FALSE; |
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335 } |
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336 md_sleep(1); |
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337 } |
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338 else |
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339 return FALSE; |
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340 } |
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341 #endif |
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342 #endif |
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343 } |
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344 |
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345 /* |
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346 * unlock_sc: |
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347 * Unlock the score file |
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348 */ |
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349 unlock_sc() |
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350 { |
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351 #ifdef SCOREFILE |
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352 #ifdef LOCKFILE |
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353 md_unlink(lockfile); |
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354 #endif |
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355 #endif |
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356 } |
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357 |
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358 /* |
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359 * flush_type: |
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360 * Flush typeahead for traps, etc. |
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361 */ |
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362 flush_type() |
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363 { |
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364 flushinp(); |
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365 } |