Mercurial > hg > early-roguelike
annotate rogue4/mach_dep.c @ 279:d3968e9cb98d
Use C stdio functions for score files and save files.
Switching from Unix file descriptor operations to C standard FILE*
functions will reduce portability problems.
author | John "Elwin" Edwards |
---|---|
date | Fri, 15 Sep 2017 19:57:54 -0400 |
parents | 1b73a8641b37 |
children | 6376b514a30b |
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> |
279
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40 #include <errno.h> |
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41 #include "rogue.h" |
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42 |
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43 int num_checks; /* times we've gone over in checkout() */ |
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44 |
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45 #ifdef SCOREFILE |
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46 #ifdef LOCKFILE |
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47 static char *lockfile = LOCKFILE; |
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48 #endif |
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49 #endif |
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50 |
215 | 51 int too_much(void); |
52 bool author(void); | |
53 void checkout(int s); | |
54 void chmsg(char *fmt, int arg); | |
55 | |
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56 /* |
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57 * init_check: |
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58 * Check out too see if it is proper to play the game now |
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59 */ |
215 | 60 void |
61 init_check(void) | |
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62 { |
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63 if (too_much()) |
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64 { |
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65 printf("Sorry, %s, but the system is too loaded now.\n", whoami); |
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66 printf("Try again later. Meanwhile, why not enjoy a%s %s?\n", |
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67 vowelstr(fruit), fruit); |
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68 if (author()) |
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69 printf("However, since you're a good guy, it's up to you\n"); |
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70 else |
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71 exit(1); |
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72 } |
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73 } |
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74 |
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75 /* |
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76 * open_score: |
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77 * Open up the score file for future use, and then |
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78 * setuid(getuid()) in case we are running setuid. |
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79 */ |
215 | 80 void |
81 open_score(void) | |
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82 { |
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83 #ifdef SCOREFILE |
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84 score_file = fopen(SCOREFILE, "r+"); |
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85 if ((score_file == NULL) && (errno == ENOENT)) { |
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86 score_file = fopen(SCOREFILE, "w+"); |
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87 } |
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88 #else |
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89 score_file = NULL; |
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90 #endif |
13 | 91 if (!use_savedir) |
92 md_normaluser(); | |
93 return; | |
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94 } |
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95 |
215 | 96 void |
97 open_log(void) | |
26 | 98 { |
99 #ifdef LOGFILE | |
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100 log_file = fopen(LOGFILE, "a"); |
26 | 101 #else |
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102 log_file = NULL; |
26 | 103 #endif |
104 return; | |
105 } | |
106 | |
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107 /* |
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108 * setup: |
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109 * Get starting setup for all games |
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110 */ |
215 | 111 void |
112 setup(void) | |
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113 { |
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114 void auto_save(), quit(), endit(), tstp(); |
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115 |
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116 /* |
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117 * make sure that large terminals don't overflow the bounds |
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118 * of the program |
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119 */ |
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120 if (LINES > MAXLINES) |
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121 LINES = MAXLINES; |
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122 if (COLS > MAXCOLS) |
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123 COLS = MAXCOLS; |
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124 |
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125 #ifdef SIGHUP |
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126 signal(SIGHUP, auto_save); |
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127 #endif |
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128 #ifndef DUMP |
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129 signal(SIGILL, auto_save); |
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130 #ifdef SIGTRAP |
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131 signal(SIGTRAP, auto_save); |
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132 #endif |
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133 #ifdef SIGIOT |
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134 signal(SIGIOT, auto_save); |
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135 #endif |
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136 #ifdef SIGEMT |
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137 signal(SIGEMT, auto_save); |
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138 #endif |
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139 signal(SIGFPE, auto_save); |
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140 #ifdef SIGBUS |
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141 signal(SIGBUS, auto_save); |
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142 #endif |
23 | 143 /* Don't bother saving a game that segfaulted. */ |
144 signal(SIGSEGV, SIG_DFL); | |
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145 #ifdef SIGSYS |
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146 signal(SIGSYS, auto_save); |
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147 #endif |
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148 signal(SIGTERM, auto_save); |
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149 #endif |
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150 |
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151 signal(SIGINT, quit); |
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152 #ifndef DUMP |
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153 #ifdef SIGQUIT |
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154 signal(SIGQUIT, endit); |
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155 #endif |
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156 #endif |
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157 #ifdef CHECKTIME |
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158 signal(SIGALRM, checkout); |
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159 alarm(CHECKTIME * 60); |
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160 num_checks = 0; |
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161 #endif |
32
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162 nonl(); |
12
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163 crmode(); /* Cbreak mode */ |
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164 noecho(); /* Echo off */ |
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165 } |
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166 |
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167 /* |
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168 * start_score: |
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169 * Start the scoring sequence |
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170 */ |
215 | 171 void |
172 start_score(void) | |
12
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173 { |
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174 #ifdef SIGALRM |
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175 signal(SIGALRM, SIG_IGN); |
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176 #endif |
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177 } |
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178 |
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179 /* |
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180 * issymlink: |
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181 * See if the file has a symbolic link |
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182 */ |
215 | 183 bool |
184 issymlink(char *sp) | |
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185 { |
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186 #ifdef S_IFLNK |
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187 struct stat sbuf2; |
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188 |
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189 if (lstat(sp, &sbuf2) < 0) |
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190 return FALSE; |
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191 else |
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192 return ((sbuf2.st_mode & S_IFMT) != S_IFREG); |
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193 #else |
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194 return FALSE; |
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195 #endif |
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196 } |
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197 |
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198 /* |
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199 * too_much: |
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200 * See if the system is being used too much for this game |
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201 */ |
215 | 202 int |
203 too_much(void) | |
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204 { |
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205 #ifdef MAXLOAD |
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206 double avec[3]; |
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207 |
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208 if (md_getloadavg(avec) == 0) |
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209 if (avec[2] > (MAXLOAD / 10.0)) |
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210 return(1); |
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211 #endif |
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212 #ifdef MAXUSERS |
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213 if (md_ucount() > MAXUSERS) |
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214 return(1) ; |
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215 #endif |
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216 return(0); |
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217 } |
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218 |
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219 /* |
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220 * author: |
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221 * See if a user is an author of the program |
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222 */ |
215 | 223 bool |
224 author(void) | |
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225 { |
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226 #ifdef WIZARD |
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227 if (wizard) |
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228 return TRUE; |
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229 #endif |
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230 switch (md_getuid()) |
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231 { |
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232 case 0: |
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233 return TRUE; |
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234 default: |
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235 return FALSE; |
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236 } |
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237 } |
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238 |
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239 /* |
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240 * checkout: |
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241 * Check each CHECKTIME seconds to see if the load is too high |
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242 */ |
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243 void |
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244 checkout(int s) |
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245 { |
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246 static char *msgs[] = { |
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247 "The load is too high to be playing. Please leave in %0.1f minutes", |
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248 "Please save your game. You have %0.1f minutes", |
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249 "Last warning. You have %0.1f minutes to leave", |
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250 }; |
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251 int checktime = 0; |
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252 |
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253 #ifdef SIGALRM |
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254 signal(SIGALRM, checkout); |
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255 #endif |
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256 |
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257 if (too_much()) |
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258 { |
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259 if (author()) |
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260 { |
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261 num_checks = 1; |
215 | 262 chmsg("The load is rather high, O exaulted one", 0); |
12
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263 } |
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264 else if (num_checks++ == 3) |
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265 fatal("Sorry. You took to long. You are dead\n"); |
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266 |
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267 #ifdef CHECKTIME |
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268 checktime = (CHECKTIME * 60) / num_checks; |
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269 #endif |
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270 #ifdef SIGALRM |
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271 alarm(checktime); |
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272 #endif |
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273 |
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274 chmsg(msgs[num_checks - 1], ((double) checktime / 60.0)); |
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275 } |
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276 else |
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277 { |
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278 if (num_checks) |
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279 { |
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280 num_checks = 0; |
215 | 281 chmsg("The load has dropped back down. You have a reprieve", 0); |
12
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282 } |
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283 #ifdef CHECKTIME |
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284 #ifdef SIGALRM |
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285 alarm(CHECKTIME * 60); |
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286 #endif |
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287 #endif |
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288 } |
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289 } |
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290 |
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291 /* |
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292 * chmsg: |
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293 * checkout()'s version of msg. If we are in the middle of a |
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294 * shell, do a printf instead of a msg to avoid the refresh. |
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295 */ |
215 | 296 void |
297 chmsg(char *fmt, int arg) | |
12
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298 { |
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299 if (in_shell) |
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300 { |
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301 printf(fmt, arg); |
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302 putchar('\n'); |
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303 fflush(stdout); |
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304 } |
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305 else |
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306 msg(fmt, arg); |
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307 } |
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308 |
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309 /* |
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310 * lock_sc: |
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311 * lock the score file. If it takes too long, ask the user if |
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312 * they care to wait. Return TRUE if the lock is successful. |
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313 */ |
215 | 314 bool |
315 lock_sc(void) | |
12
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316 { |
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317 #ifdef SCOREFILE |
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318 #ifdef LOCKFILE |
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319 register int cnt; |
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320 static struct stat sbuf; |
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321 |
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322 over: |
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323 if (creat(lockfile, 0000) > 0) |
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324 return TRUE; |
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325 for (cnt = 0; cnt < 5; cnt++) |
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326 { |
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327 md_sleep(1); |
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328 if (creat(lockfile, 0000) > 0) |
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329 return TRUE; |
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330 } |
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331 if (stat(lockfile, &sbuf) < 0) |
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332 { |
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333 creat(lockfile, 0000); |
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334 return TRUE; |
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335 } |
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336 if (time(NULL) - sbuf.st_mtime > 10) |
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337 { |
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338 if (md_unlink(lockfile) < 0) |
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339 return FALSE; |
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340 goto over; |
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341 } |
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342 else |
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343 { |
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344 printf("The score file is very busy. Do you want to wait longer\n"); |
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345 printf("for it to become free so your score can get posted?\n"); |
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346 printf("If so, type \"y\"\n"); |
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347 fgets(prbuf, MAXSTR, stdin); |
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348 if (prbuf[0] == 'y') |
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349 for (;;) |
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350 { |
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351 if (creat(lockfile, 0000) > 0) |
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352 return TRUE; |
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353 if (stat(lockfile, &sbuf) < 0) |
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354 { |
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355 creat(lockfile, 0000); |
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356 return TRUE; |
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357 } |
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358 if (time(NULL) - sbuf.st_mtime > 10) |
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359 { |
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360 if (md_unlink(lockfile) < 0) |
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361 return FALSE; |
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362 } |
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363 md_sleep(1); |
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364 } |
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365 else |
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366 return FALSE; |
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367 } |
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368 #endif |
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369 #endif |
45
5926ec314fd4
Make sure lock_sc always returns a value. Fixes a weird bug that prevented the scorelist from updating.
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370 return TRUE; |
12
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371 } |
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372 |
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373 /* |
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374 * unlock_sc: |
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375 * Unlock the score file |
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376 */ |
215 | 377 void |
378 unlock_sc(void) | |
12
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379 { |
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380 #ifdef SCOREFILE |
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381 #ifdef LOCKFILE |
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382 md_unlink(lockfile); |
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383 #endif |
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384 #endif |
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385 } |
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386 |
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387 /* |
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388 * flush_type: |
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389 * Flush typeahead for traps, etc. |
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390 */ |
215 | 391 void |
392 flush_type(void) | |
12
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393 { |
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394 flushinp(); |
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395 } |