Mercurial > hg > early-roguelike
annotate srogue/options.c @ 313:2f75940cc544
Advanced Rogue 7: fix a string literal overwrite.
pick_spell() attempted to capitalize type by overwriting the first
character, changing it back later. All calls of pick_spell passed a
string literal as type, and string literals should be considered
immutable.
This has been fixed by using a separate variable for the capitalized
first character. XRogue already has a similar fix.
Reported by John Harris of @Play.
author | John "Elwin" Edwards |
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date | Tue, 19 Oct 2021 20:39:00 -0400 |
parents | d71e5e1f49cf |
children |
rev | line source |
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1 /* |
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2 * This file has all the code for the option command. |
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3 * |
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4 * @(#)options.c 9.0 (rdk) 7/17/84 |
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5 * |
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6 * Super-Rogue |
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7 * Copyright (C) 1984 Robert D. Kindelberger |
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8 * All rights reserved. |
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9 * |
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10 * Based on "Rogue: Exploring the Dungeons of Doom" |
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11 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman |
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12 * All rights reserved. |
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13 * |
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14 * See the file LICENSE.TXT for full copyright and licensing information. |
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15 */ |
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16 |
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17 #include <ctype.h> |
60 | 18 #include <string.h> |
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19 #include "rogue.h" |
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20 #include "rogue.ext" |
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21 |
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22 /* |
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23 * description of an option and what to do with it |
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24 */ |
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25 struct optstruct { |
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26 char *o_name; /* option name */ |
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27 char *o_prompt; /* prompt for interactive entry */ |
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28 char *o_opt; /* pointer to thing to set */ |
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29 }; |
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30 |
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31 typedef struct optstruct OPTION; |
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32 |
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33 int allowchange(OPTION *opt); |
36
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34 |
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35 OPTION optlist[] = { |
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36 { "name", "Name: ", whoami }, |
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37 { "fruit", "Fruit: ", fruit }, |
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38 { "file", "Save file: ", file_name } |
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39 }; |
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40 #define NUM_OPTS (sizeof optlist / sizeof (OPTION)) |
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41 OPTION safeoptlist[] = { |
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42 { "fruit", "Fruit: ", fruit }, |
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43 }; |
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44 #define NUM_SOPTS (sizeof safeoptlist / sizeof (OPTION)) |
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45 |
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46 /* |
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47 * print and then set options from the terminal |
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48 */ |
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49 void |
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50 option(void) |
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51 { |
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52 reg OPTION *op; |
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53 reg int wh; |
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54 OPTION *olist; |
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55 int olen; |
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56 |
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57 if (use_savedir) { |
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58 olist = safeoptlist; |
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59 olen = NUM_SOPTS; |
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60 } |
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61 else { |
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62 olist = optlist; |
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63 olen = NUM_OPTS; |
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64 } |
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65 |
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66 wclear(hw); |
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67 touchwin(hw); |
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68 /* |
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69 * Display current values of options |
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70 */ |
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71 for (op = olist; op < &olist[olen]; op++) { |
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72 wh = op - olist; |
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73 mvwaddstr(hw, wh, 0, op->o_prompt); |
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74 mvwaddstr(hw, wh, 16, op->o_opt); |
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75 } |
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76 /* |
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77 * Set values |
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78 */ |
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79 wmove(hw, 0, 0); |
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80 for (op = olist; op < &olist[olen]; op++) { |
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81 wmove(hw, op - olist, 16); |
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82 if ((wh = get_str(op->o_opt, hw))) { |
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83 if (wh == QUIT) |
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84 break; |
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85 else if (op > olist) { |
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86 wmove(hw, op - olist, 0); |
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87 op -= 2; |
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88 } |
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89 else { |
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90 putchar(7); |
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91 wmove(hw, 0, 0); |
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92 op -= 1; |
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93 } |
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94 } |
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95 } |
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96 /* |
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97 * Switch back to original screen |
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98 */ |
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99 dbotline(hw,spacemsg); |
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100 restscr(cw); |
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101 after = FALSE; |
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102 } |
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103 |
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104 |
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105 /* |
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106 * get_str: |
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107 * Set a string option |
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108 */ |
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109 #define CTRLB 2 |
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110 int |
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111 get_str(char *opt, WINDOW *awin) |
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112 { |
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113 reg char *sp; |
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114 reg int c, oy, ox; |
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115 char buf[LINLEN]; |
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116 |
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117 draw(awin); |
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118 getyx(awin, oy, ox); |
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119 /* |
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120 * loop reading in the string, and put it in a temporary buffer |
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121 */ |
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122 for (sp = buf; (c=readchar()) != '\n' && c != '\r' && c != ESCAPE; |
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123 wclrtoeol(awin), draw(awin)) { |
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124 if (sp - buf >= 50) { |
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125 *sp = '\0'; /* line was too long */ |
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126 strucpy(opt,buf,strlen(buf)); |
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127 mvwaddstr(awin, 0, 0, "Name was truncated --More--"); |
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128 wclrtoeol(awin); |
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129 draw(awin); |
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130 wait_for(awin, ' '); |
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131 mvwprintw(awin, 0, 0, "Called: %s",opt); |
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132 draw(awin); |
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133 return NORM; |
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134 } |
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135 if (c == -1) |
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136 continue; |
119 | 137 else if(c == md_erasechar()) { /* process erase char */ |
36
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138 if (sp > buf) { |
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139 reg int i; |
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140 |
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141 sp--; |
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142 for (i = strlen(unctrl(*sp)); i; i--) |
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143 waddch(awin, '\b'); |
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144 } |
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145 continue; |
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146 } |
119 | 147 else if (c == md_killchar()) { /* process kill character */ |
36
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148 sp = buf; |
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149 wmove(awin, oy, ox); |
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150 continue; |
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151 } |
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152 else if (sp == buf) { |
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153 if (c == CTRLB) /* CTRL - B */ |
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154 break; |
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155 if (c == '~') { |
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156 strcpy(buf, home); |
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157 waddstr(awin, home); |
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158 sp += strlen(home); |
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159 continue; |
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160 } |
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161 } |
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162 *sp++ = c; |
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163 waddstr(awin, unctrl(c)); |
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164 } |
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165 *sp = '\0'; |
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166 if (sp > buf) /* only change option if something was typed */ |
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167 strucpy(opt, buf, strlen(buf)); |
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168 wmove(awin, oy, ox); |
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169 waddstr(awin, opt); |
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170 waddstr(awin, "\n\r"); |
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171 draw(awin); |
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172 if (awin == cw) |
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173 mpos += sp - buf; |
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174 if (c == CTRLB) |
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175 return MINUS; |
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176 if (c == ESCAPE) |
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177 return QUIT; |
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178 return NORM; |
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179 } |
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180 |
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181 /* |
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182 * parse_opts: |
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183 * Parse options from string, usually taken from the environment. |
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184 * the string is a series of comma seperated values, with strings |
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185 * being "name=....", with the string being defined up to a comma |
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186 * or the end of the entire option string. |
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187 */ |
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188 |
217
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189 void |
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190 parse_opts(char *str) |
36
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191 { |
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192 reg char *sp; |
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193 reg OPTION *op; |
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194 reg int len; |
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195 |
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196 while (*str) { |
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197 for (sp = str; isalpha(*sp); sp++) /* get option name */ |
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198 continue; |
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199 len = sp - str; |
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200 for (op = optlist; op < &optlist[NUM_OPTS]; op++) { |
37 | 201 /* For security, some options can't be changed. */ |
202 if (!allowchange(op)) | |
203 continue; | |
36
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204 if (EQSTR(str, op->o_name, len)) { |
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205 reg char *start; |
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206 |
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207 for (str = sp + 1; *str == '='; str++) |
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208 continue; |
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209 if (*str == '~') { |
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210 strcpy(op->o_opt, home); |
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211 start = op->o_opt + strlen(home); |
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212 while (*++str == '/') |
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213 continue; |
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214 } |
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215 else |
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216 start = (char *) op->o_opt; |
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217 for (sp = str + 1; *sp && *sp != ','; sp++) |
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218 continue; |
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219 strucpy(start, str, sp - str); |
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220 } |
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221 } |
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222 /* |
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223 * skip to start of next option name |
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224 */ |
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225 while (*sp && !isalpha(*sp)) |
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226 sp++; |
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227 str = sp; |
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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 * copy string using unctrl for things |
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233 */ |
217
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234 void |
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235 strucpy(char *s1, char *s2, int len) |
36
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236 { |
283 | 237 const char *sp; |
36
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238 |
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239 while (len-- > 0) { |
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240 strcpy(s1, (sp = unctrl(*s2))); |
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241 s1 += strlen(sp); |
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242 s2++; |
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243 } |
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244 *s1 = '\0'; |
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245 } |
37 | 246 |
247 int allowchange(OPTION *opt) | |
248 { | |
249 if (!use_savedir) | |
250 return 1; | |
251 if (!strcmp(opt->o_name, "name")) | |
252 return 0; | |
253 if (!strcmp(opt->o_name, "file")) | |
254 return 0; | |
255 return 1; | |
256 } |