1 | /*
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2 | * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
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3 | * Released under the terms of the GNU GPL v2.0.
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4 | */
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5 |
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6 | #include <sys/stat.h>
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7 | #include <ctype.h>
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8 | #include <stdio.h>
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9 | #include <stdlib.h>
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10 | #include <string.h>
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11 | #include <unistd.h>
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12 |
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13 | #define LKC_DIRECT_LINK
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14 | #include "lkc.h"
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15 |
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16 | const char conf_def_filename[] = "configuration";
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17 |
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18 | const char conf_defname[] = "defconfig";
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19 |
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20 | const char *conf_confnames[] = {
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21 | "configuration",
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22 | conf_defname,
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23 | NULL,
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24 | };
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25 |
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26 | static char *conf_expand_value(const char *in)
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27 | {
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28 | struct symbol *sym;
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29 | const char *src;
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30 | static char res_value[SYMBOL_MAXLENGTH];
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31 | char *dst, name[SYMBOL_MAXLENGTH];
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32 |
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33 | res_value[0] = 0;
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34 | dst = name;
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35 | while ((src = strchr(in, '$'))) {
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36 | strncat(res_value, in, src - in);
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37 | src++;
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38 | dst = name;
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39 | while (isalnum(*src) || *src == '_')
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40 | *dst++ = *src++;
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41 | *dst = 0;
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42 | sym = sym_lookup(name, 0);
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43 | sym_calc_value(sym);
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44 | strcat(res_value, sym_get_string_value(sym));
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45 | in = src;
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46 | }
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47 | strcat(res_value, in);
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48 |
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49 | return res_value;
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50 | }
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51 |
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52 | int conf_read(const char *name)
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53 | {
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54 | FILE *in = NULL;
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55 | char line[1024];
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56 | char *p, *p2;
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57 | int lineno = 0;
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58 | struct symbol *sym;
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59 | struct property *prop;
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60 | struct expr *e;
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61 | int i;
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62 |
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63 | if (name) {
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64 | in = zconf_fopen(name);
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65 | } else {
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66 | const char **names = conf_confnames;
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67 | while ((name = *names++)) {
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68 | name = conf_expand_value(name);
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69 | in = zconf_fopen(name);
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70 | if (in) {
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71 | printf("#\n"
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72 | "# using defaults found in %s\n"
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73 | "#\n", name);
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74 | break;
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75 | }
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76 | }
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77 | }
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78 |
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79 | if (!in)
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80 | return 1;
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81 |
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82 | for_all_symbols(i, sym) {
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83 | sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
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84 | sym->flags &= ~SYMBOL_VALID;
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85 | switch (sym->type) {
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86 | case S_INT:
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87 | case S_HEX:
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88 | case S_STRING:
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89 | free(sym->user.val);
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90 | default:
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91 | sym->user.val = NULL;
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92 | sym->user.tri = no;
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93 | }
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94 | }
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95 |
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96 | while (fgets(line, sizeof(line), in)) {
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97 | lineno++;
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98 | sym = NULL;
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99 | switch (line[0]) {
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100 | case '#':
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101 | if (line[1]!=' ')
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102 | continue;
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103 | p = strchr(line + 2, ' ');
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104 | if (!p)
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105 | continue;
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106 | *p++ = 0;
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107 | if (strncmp(p, "is not set", 10))
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108 | continue;
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109 | sym = sym_find(line + 2);
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110 | if (!sym) {
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111 | fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line + 2);
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112 | break;
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113 | }
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114 | switch (sym->type) {
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115 | case S_BOOLEAN:
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116 | case S_TRISTATE:
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117 | sym->user.tri = no;
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118 | sym->flags &= ~SYMBOL_NEW;
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119 | break;
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120 | default:
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121 | ;
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122 | }
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123 | break;
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124 |
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125 | case 'A' ... 'Z':
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126 | p = strchr(line, '=');
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127 | if (!p)
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128 | continue;
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129 | *p++ = 0;
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130 | p2 = strchr(p, '\n');
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131 | if (p2)
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132 | *p2 = 0;
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133 | sym = sym_find(line);
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134 | if (!sym) {
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135 | fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line);
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136 | break;
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137 | }
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138 | switch (sym->type) {
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139 | case S_TRISTATE:
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140 | if (p[0] == 'm') {
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141 | sym->user.tri = mod;
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142 | sym->flags &= ~SYMBOL_NEW;
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143 | break;
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144 | }
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145 | case S_BOOLEAN:
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146 | if (p[0] == 'y') {
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147 | sym->user.tri = yes;
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148 | sym->flags &= ~SYMBOL_NEW;
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149 | break;
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150 | }
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151 | if (p[0] == 'n') {
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152 | sym->user.tri = no;
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153 | sym->flags &= ~SYMBOL_NEW;
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154 | break;
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155 | }
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156 | break;
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157 | case S_STRING:
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158 | if (*p++ != '"')
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159 | break;
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160 | for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
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161 | if (*p2 == '"') {
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162 | *p2 = 0;
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163 | break;
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164 | }
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165 | memmove(p2, p2 + 1, strlen(p2));
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166 | }
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167 | if (!p2) {
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168 | fprintf(stderr, "%s:%d: invalid string found\n", name, lineno);
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169 | exit(1);
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170 | }
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171 | case S_INT:
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172 | case S_HEX:
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173 | if (sym_string_valid(sym, p)) {
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174 | sym->user.val = strdup(p);
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175 | sym->flags &= ~SYMBOL_NEW;
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176 | } else {
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177 | fprintf(stderr, "%s:%d: symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
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178 | exit(1);
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179 | }
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180 | break;
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181 | default:
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182 | ;
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183 | }
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184 | break;
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185 | case '\n':
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186 | break;
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187 | default:
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188 | continue;
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189 | }
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190 | if (sym && sym_is_choice_value(sym)) {
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191 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
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192 | switch (sym->user.tri) {
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193 | case no:
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194 | break;
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195 | case mod:
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196 | if (cs->user.tri == yes)
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197 | /* warn? */;
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198 | break;
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199 | case yes:
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200 | if (cs->user.tri != no)
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201 | /* warn? */;
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202 | cs->user.val = sym;
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203 | break;
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204 | }
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205 | cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
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206 | cs->flags &= ~SYMBOL_NEW;
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207 | }
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208 | }
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209 | fclose(in);
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210 |
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211 | if (modules_sym)
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212 | sym_calc_value(modules_sym);
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213 | for_all_symbols(i, sym) {
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214 | sym_calc_value(sym);
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215 | if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
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216 | if (sym->visible == no)
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217 | sym->flags |= SYMBOL_NEW;
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218 | switch (sym->type) {
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219 | case S_STRING:
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220 | case S_INT:
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221 | case S_HEX:
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222 | if (!sym_string_within_range(sym, sym->user.val))
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223 | sym->flags |= SYMBOL_NEW;
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224 | default:
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225 | break;
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226 | }
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227 | }
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228 | if (!sym_is_choice(sym))
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229 | continue;
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230 | prop = sym_get_choice_prop(sym);
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231 | for (e = prop->expr; e; e = e->left.expr)
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232 | if (e->right.sym->visible != no)
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233 | sym->flags |= e->right.sym->flags & SYMBOL_NEW;
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234 | }
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235 |
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236 | sym_change_count = 1;
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237 |
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238 | return 0;
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239 | }
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240 |
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241 | struct menu *next_menu(struct menu *menu)
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242 | {
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243 | if (menu->list) return menu->list;
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244 | do {
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245 | if (menu->next) {
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246 | menu = menu->next;
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247 | break;
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248 | }
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249 | } while ((menu = menu->parent));
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250 |
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251 | return menu;
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252 | }
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253 |
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254 | #define SYMBOL_FORCEWRITE (1<<31)
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255 |
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256 | int conf_write(const char *name)
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257 | {
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258 | FILE *out;
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259 | struct symbol *sym;
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260 | struct menu *menu;
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261 | const char *basename;
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262 | char dirname[128], tmpname[128], newname[128];
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263 | int type, l;
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264 | const char *str;
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265 |
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266 | dirname[0] = 0;
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267 | if (name && name[0]) {
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268 | struct stat st;
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269 | char *slash;
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270 |
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271 | if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
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272 | strcpy(dirname, name);
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273 | strcat(dirname, "/");
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274 | basename = conf_def_filename;
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275 | } else if ((slash = strrchr(name, '/'))) {
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276 | int size = slash - name + 1;
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277 | memcpy(dirname, name, size);
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278 | dirname[size] = 0;
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279 | if (slash[1])
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280 | basename = slash + 1;
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281 | else
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282 | basename = conf_def_filename;
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283 | } else
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284 | basename = name;
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285 | } else
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286 | basename = conf_def_filename;
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287 |
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288 | sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
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289 | out = fopen(newname, "w");
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290 | if (!out)
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291 | return 1;
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292 | fprintf(out, "#\n"
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293 | "# Automatically generated configuration: don't edit\n"
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294 | "# use make menuconfig or make config to make changes\n"
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295 | "#\n");
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296 |
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297 | if (!sym_change_count)
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298 | sym_clear_all_valid();
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299 |
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300 | /* Force write of all non-duplicate symbols. */
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301 |
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302 | /* Write out everything by default. */
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303 | for(menu = rootmenu.list; menu; menu = next_menu(menu))
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304 | if (menu->sym) menu->sym->flags |= SYMBOL_FORCEWRITE;
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305 |
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306 | menu = rootmenu.list;
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307 | while (menu) {
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308 | sym = menu->sym;
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309 | if (!sym) {
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310 | if (!menu_is_visible(menu))
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311 | goto next;
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312 | str = menu_get_prompt(menu);
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313 | fprintf(out, "\n"
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314 | "#\n"
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315 | "# %s\n"
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316 | "#\n", str);
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317 | } else if (!(sym->flags & SYMBOL_CHOICE)) {
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318 | sym_calc_value(sym);
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319 | if (!(sym->flags & SYMBOL_FORCEWRITE))
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320 | goto next;
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321 |
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322 | sym->flags &= ~SYMBOL_FORCEWRITE;
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323 | type = sym->type;
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324 | if (type == S_TRISTATE) {
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325 | sym_calc_value(modules_sym);
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326 | if (modules_sym->curr.tri == no)
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327 | type = S_BOOLEAN;
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328 | }
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329 |
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330 |
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331 | switch (type) {
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332 | case S_BOOLEAN:
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333 | case S_TRISTATE:
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334 | switch (sym_get_tristate_value(sym)) {
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335 | case no:
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336 | fprintf(out, "# %s is not set\n", sym->name);
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337 | break;
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338 | case mod:
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339 | fprintf(out, "%s=m\n", sym->name);
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340 | break;
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341 | case yes:
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342 | fprintf(out, "%s=y\n", sym->name);
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343 | break;
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344 | }
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345 | break;
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346 | case S_STRING:
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347 | // fix me
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348 | str = sym_get_string_value(sym);
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349 | fprintf(out, "%s=\"", sym->name);
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350 | do {
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351 | l = strcspn(str, "\"\\");
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352 | if (l) {
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353 | fwrite(str, l, 1, out);
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354 | }
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355 | str += l;
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356 | while (*str == '\\' || *str == '"') {
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357 | fprintf(out, "\\%c", *str);
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358 | str++;
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359 | }
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360 | } while (*str);
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361 | fputs("\"\n", out);
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362 | break;
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363 | case S_HEX:
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364 | str = sym_get_string_value(sym);
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365 | if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
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366 | fprintf(out, "%s=%s\n", sym->name, *str ? str : "0");
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367 | break;
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368 | }
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369 | case S_INT:
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370 | str = sym_get_string_value(sym);
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371 | fprintf(out, "%s=%s\n", sym->name, *str ? str : "0");
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372 | break;
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373 | }
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374 | }
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375 | next:
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376 | menu = next_menu(menu);
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377 | }
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378 | fclose(out);
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379 | if (!name || basename != conf_def_filename) {
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380 | if (!name)
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381 | name = conf_def_filename;
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382 | sprintf(tmpname, "%s.old", name);
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383 | rename(name, tmpname);
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384 | }
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385 | sprintf(tmpname, "%s%s", dirname, basename);
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386 | if (rename(newname, tmpname))
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387 | return 1;
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388 |
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389 | sym_change_count = 0;
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390 |
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391 | return 0;
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392 | }
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