OpenWrt – Blame information for rev 1
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Rev | Author | Line No. | Line |
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1 | office | 1 | #!/usr/bin/env perl |
2 | # |
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3 | # Copyright (C) 2006 Felix Fietkau <nbd@nbd.name> |
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4 | # |
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5 | # This is free software, licensed under the GNU General Public License v2. |
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6 | # See /LICENSE for more information. |
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7 | # |
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8 | |||
9 | use warnings; |
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10 | use strict; |
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11 | |||
12 | my @arg; |
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13 | my $PREFIX = "CONFIG_"; |
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14 | |||
15 | sub set_config($$$$) { |
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16 | my $config = shift; |
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17 | my $idx = shift; |
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18 | my $newval = shift; |
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19 | my $mod_plus = shift; |
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20 | |||
21 | if (!defined($config->{$idx}) or !$mod_plus or |
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22 | $config->{$idx} eq '#undef' or $newval eq 'y') { |
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23 | $config->{$idx} = $newval; |
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24 | } |
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25 | } |
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26 | |||
27 | sub load_config($$) { |
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28 | my $file = shift; |
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29 | my $mod_plus = shift; |
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30 | my %config; |
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31 | |||
32 | open FILE, "$file" or die "can't open file '$file'"; |
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33 | while (<FILE>) { |
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34 | chomp; |
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35 | /^$PREFIX(.+?)=(.+)/ and do { |
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36 | set_config(\%config, $1, $2, $mod_plus); |
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37 | next; |
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38 | }; |
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39 | /^# $PREFIX(.+?) is not set/ and do { |
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40 | set_config(\%config, $1, "#undef", $mod_plus); |
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41 | next; |
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42 | }; |
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43 | /^#/ and next; |
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44 | /^(.+)$/ and warn "WARNING: can't parse line: $1\n"; |
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45 | } |
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46 | return \%config; |
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47 | } |
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48 | |||
49 | |||
50 | sub config_and($$) { |
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51 | my $cfg1 = shift; |
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52 | my $cfg2 = shift; |
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53 | my %config; |
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54 | |||
55 | foreach my $config (keys %$cfg1) { |
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56 | my $val1 = $cfg1->{$config}; |
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57 | my $val2 = $cfg2->{$config}; |
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58 | $val2 and ($val1 eq $val2) and do { |
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59 | $config{$config} = $val1; |
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60 | }; |
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61 | } |
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62 | return \%config; |
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63 | } |
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64 | |||
65 | |||
66 | sub config_add($$$) { |
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67 | my $cfg1 = shift; |
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68 | my $cfg2 = shift; |
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69 | my $mod_plus = shift; |
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70 | my %config; |
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71 | |||
72 | for ($cfg1, $cfg2) { |
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73 | my %cfg = %$_; |
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74 | |||
75 | foreach my $config (keys %cfg) { |
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76 | if ($mod_plus and $config{$config}) { |
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77 | next if $config{$config} eq "y"; |
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78 | next if $cfg{$config} eq '#undef'; |
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79 | } |
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80 | $config{$config} = $cfg{$config}; |
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81 | } |
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82 | } |
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83 | return \%config; |
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84 | } |
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85 | |||
86 | sub config_diff($$$) { |
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87 | my $cfg1 = shift; |
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88 | my $cfg2 = shift; |
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89 | my $new_only = shift; |
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90 | my %config; |
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91 | |||
92 | foreach my $config (keys %$cfg2) { |
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93 | if (!defined($cfg1->{$config}) or $cfg1->{$config} ne $cfg2->{$config}) { |
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94 | next if $new_only and !defined($cfg1->{$config}) and $cfg2->{$config} eq '#undef'; |
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95 | $config{$config} = $cfg2->{$config}; |
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96 | } |
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97 | } |
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98 | return \%config |
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99 | } |
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100 | |||
101 | sub config_sub($$) { |
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102 | my $cfg1 = shift; |
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103 | my $cfg2 = shift; |
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104 | my %config = %{$cfg1}; |
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105 | |||
106 | foreach my $config (keys %$cfg2) { |
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107 | delete $config{$config}; |
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108 | } |
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109 | return \%config; |
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110 | } |
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111 | |||
112 | sub print_cfgline($$) { |
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113 | my $name = shift; |
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114 | my $val = shift; |
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115 | if ($val eq '#undef' or $val eq 'n') { |
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116 | print "# $PREFIX$name is not set\n"; |
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117 | } else { |
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118 | print "$PREFIX$name=$val\n"; |
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119 | } |
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120 | } |
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121 | |||
122 | |||
123 | sub dump_config($) { |
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124 | my $cfg = shift; |
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125 | die "argument error in dump_config" unless ($cfg); |
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126 | my %config = %$cfg; |
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127 | foreach my $config (sort keys %config) { |
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128 | print_cfgline($config, $config{$config}); |
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129 | } |
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130 | } |
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131 | |||
132 | sub parse_expr { |
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133 | my $pos = shift; |
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134 | my $mod_plus = shift; |
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135 | my $arg = $arg[$$pos++]; |
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136 | |||
137 | die "Parse error" if (!$arg); |
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138 | |||
139 | if ($arg eq '&') { |
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140 | my $arg1 = parse_expr($pos); |
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141 | my $arg2 = parse_expr($pos); |
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142 | return config_and($arg1, $arg2); |
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143 | } elsif ($arg =~ /^\+/) { |
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144 | my $arg1 = parse_expr($pos); |
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145 | my $arg2 = parse_expr($pos); |
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146 | return config_add($arg1, $arg2, 0); |
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147 | } elsif ($arg =~ /^m\+/) { |
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148 | my $arg1 = parse_expr($pos); |
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149 | my $arg2 = parse_expr($pos, 1); |
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150 | return config_add($arg1, $arg2, 1); |
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151 | } elsif ($arg eq '>') { |
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152 | my $arg1 = parse_expr($pos); |
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153 | my $arg2 = parse_expr($pos); |
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154 | return config_diff($arg1, $arg2, 0); |
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155 | } elsif ($arg eq '>+') { |
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156 | my $arg1 = parse_expr($pos); |
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157 | my $arg2 = parse_expr($pos); |
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158 | return config_diff($arg1, $arg2, 1); |
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159 | } elsif ($arg eq '-') { |
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160 | my $arg1 = parse_expr($pos); |
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161 | my $arg2 = parse_expr($pos); |
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162 | return config_sub($arg1, $arg2); |
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163 | } else { |
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164 | return load_config($arg, $mod_plus); |
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165 | } |
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166 | } |
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167 | |||
168 | while (@ARGV > 0 and $ARGV[0] =~ /^-\w+$/) { |
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169 | my $cmd = shift @ARGV; |
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170 | if ($cmd =~ /^-n$/) { |
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171 | $PREFIX = ""; |
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172 | } elsif ($cmd =~ /^-p$/) { |
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173 | $PREFIX = shift @ARGV; |
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174 | } else { |
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175 | die "Invalid option: $cmd\n"; |
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176 | } |
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177 | } |
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178 | @arg = @ARGV; |
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179 | |||
180 | my $pos = 0; |
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181 | dump_config(parse_expr(\$pos)); |
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182 | die "Parse error" if ($arg[$pos]); |