1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * od implementation for busybox
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4 | * Based on code from util-linux v 2.11l
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5 | *
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6 | * Copyright (c) 1990
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7 | * The Regents of the University of California. All rights reserved.
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8 | *
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9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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10 | *
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11 | * Original copyright notice is retained at the end of this file.
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12 | */
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13 |
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14 |
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15 | #include "libbb.h"
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16 | #if ENABLE_DESKTOP
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17 | /* This one provides -t (busybox's own build script needs it) */
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18 | #include "od_bloaty.c"
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19 | #else
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20 |
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21 | #include "dump.h"
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22 |
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23 | static void
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24 | odoffset(dumper_t *dumper, int argc, char ***argvp)
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25 | {
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26 | char *num, *p;
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27 | int base;
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28 | char *end;
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29 |
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30 | /*
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31 | * The offset syntax of od(1) was genuinely bizarre. First, if
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32 | * it started with a plus it had to be an offset. Otherwise, if
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33 | * there were at least two arguments, a number or lower-case 'x'
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34 | * followed by a number makes it an offset. By default it was
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35 | * octal; if it started with 'x' or '0x' it was hex. If it ended
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36 | * in a '.', it was decimal. If a 'b' or 'B' was appended, it
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37 | * multiplied the number by 512 or 1024 byte units. There was
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38 | * no way to assign a block count to a hex offset.
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39 | *
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40 | * We assumes it's a file if the offset is bad.
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41 | */
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42 | p = **argvp;
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43 |
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44 | if (!p) {
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45 | /* hey someone is probably piping to us ... */
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46 | return;
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47 | }
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48 |
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49 | if ((*p != '+')
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50 | && (argc < 2
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51 | || (!isdigit(p[0])
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52 | && ((p[0] != 'x') || !isxdigit(p[1])))))
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53 | return;
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54 |
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55 | base = 0;
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56 | /*
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57 | * skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
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58 | * set base.
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59 | */
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60 | if (p[0] == '+')
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61 | ++p;
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62 | if (p[0] == 'x' && isxdigit(p[1])) {
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63 | ++p;
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64 | base = 16;
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65 | } else if (p[0] == '0' && p[1] == 'x') {
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66 | p += 2;
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67 | base = 16;
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68 | }
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69 |
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70 | /* skip over the number */
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71 | if (base == 16)
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72 | for (num = p; isxdigit(*p); ++p)
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73 | continue;
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74 | else
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75 | for (num = p; isdigit(*p); ++p)
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76 | continue;
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77 |
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78 | /* check for no number */
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79 | if (num == p)
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80 | return;
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81 |
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82 | /* if terminates with a '.', base is decimal */
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83 | if (*p == '.') {
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84 | if (base)
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85 | return;
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86 | base = 10;
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87 | }
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88 |
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89 | dumper->dump_skip = strtol(num, &end, base ? base : 8);
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90 |
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91 | /* if end isn't the same as p, we got a non-octal digit */
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92 | if (end != p)
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93 | dumper->dump_skip = 0;
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94 | else {
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95 | if (*p) {
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96 | if (*p == 'b') {
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97 | dumper->dump_skip *= 512;
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98 | ++p;
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99 | } else if (*p == 'B') {
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100 | dumper->dump_skip *= 1024;
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101 | ++p;
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102 | }
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103 | }
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104 | if (*p)
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105 | dumper->dump_skip = 0;
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106 | else {
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107 | ++*argvp;
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108 | /*
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109 | * If the offset uses a non-octal base, the base of
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110 | * the offset is changed as well. This isn't pretty,
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111 | * but it's easy.
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112 | */
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113 | #define TYPE_OFFSET 7
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114 | {
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115 | char x_or_d;
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116 | if (base == 16) {
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117 | x_or_d = 'x';
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118 | goto DO_X_OR_D;
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119 | }
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120 | if (base == 10) {
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121 | x_or_d = 'd';
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122 | DO_X_OR_D:
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123 | dumper->fshead->nextfu->fmt[TYPE_OFFSET]
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124 | = dumper->fshead->nextfs->nextfu->fmt[TYPE_OFFSET]
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125 | = x_or_d;
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126 | }
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127 | }
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128 | }
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129 | }
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130 | }
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131 |
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132 | static const char *const add_strings[] = {
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133 | "16/1 \"%3_u \" \"\\n\"", /* a */
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134 | "8/2 \" %06o \" \"\\n\"", /* B, o */
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135 | "16/1 \"%03o \" \"\\n\"", /* b */
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136 | "16/1 \"%3_c \" \"\\n\"", /* c */
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137 | "8/2 \" %05u \" \"\\n\"", /* d */
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138 | "4/4 \" %010u \" \"\\n\"", /* D */
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139 | "2/8 \" %21.14e \" \"\\n\"", /* e (undocumented in od), F */
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140 | "4/4 \" %14.7e \" \"\\n\"", /* f */
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141 | "4/4 \" %08x \" \"\\n\"", /* H, X */
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142 | "8/2 \" %04x \" \"\\n\"", /* h, x */
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143 | "4/4 \" %11d \" \"\\n\"", /* I, L, l */
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144 | "8/2 \" %6d \" \"\\n\"", /* i */
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145 | "4/4 \" %011o \" \"\\n\"", /* O */
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146 | };
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147 |
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148 | static const char od_opts[] ALIGN1 = "aBbcDdeFfHhIiLlOoXxv";
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149 |
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150 | static const char od_o2si[] ALIGN1 = {
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151 | 0, 1, 2, 3, 5,
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152 | 4, 6, 6, 7, 8,
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153 | 9, 0xa, 0xb, 0xa, 0xa,
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154 | 0xb, 1, 8, 9,
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155 | };
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156 |
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157 | int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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158 | int od_main(int argc, char **argv)
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159 | {
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160 | int ch;
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161 | int first = 1;
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162 | char *p;
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163 | dumper_t *dumper = alloc_dumper();
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164 |
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165 | while ((ch = getopt(argc, argv, od_opts)) > 0) {
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166 | if (ch == 'v') {
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167 | dumper->dump_vflag = ALL;
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168 | } else if (((p = strchr(od_opts, ch)) != NULL) && (*p != '\0')) {
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169 | if (first) {
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170 | first = 0;
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171 | bb_dump_add(dumper, "\"%07.7_Ao\n\"");
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172 | bb_dump_add(dumper, "\"%07.7_ao \"");
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173 | } else {
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174 | bb_dump_add(dumper, "\" \"");
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175 | }
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176 | bb_dump_add(dumper, add_strings[(int)od_o2si[(p - od_opts)]]);
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177 | } else { /* P, p, s, w, or other unhandled */
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178 | bb_show_usage();
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179 | }
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180 | }
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181 | if (!dumper->fshead) {
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182 | bb_dump_add(dumper, "\"%07.7_Ao\n\"");
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183 | bb_dump_add(dumper, "\"%07.7_ao \" 8/2 \"%06o \" \"\\n\"");
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184 | }
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185 |
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186 | argc -= optind;
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187 | argv += optind;
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188 |
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189 | odoffset(dumper, argc, &argv);
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190 |
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191 | return bb_dump_dump(dumper, argv);
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192 | }
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193 | #endif /* ENABLE_DESKTOP */
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194 |
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195 | /*-
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196 | * Copyright (c) 1990 The Regents of the University of California.
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197 | * All rights reserved.
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198 | *
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199 | * Redistribution and use in source and binary forms, with or without
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200 | * modification, are permitted provided that the following conditions
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201 | * are met:
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202 | * 1. Redistributions of source code must retain the above copyright
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203 | * notice, this list of conditions and the following disclaimer.
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204 | * 2. Redistributions in binary form must reproduce the above copyright
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205 | * notice, this list of conditions and the following disclaimer in the
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206 | * documentation and/or other materials provided with the distribution.
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207 | * 3. Neither the name of the University nor the names of its contributors
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208 | * may be used to endorse or promote products derived from this software
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209 | * without specific prior written permission.
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210 | *
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211 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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212 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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213 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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214 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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215 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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216 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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217 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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218 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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219 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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220 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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221 | * SUCH DAMAGE.
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222 | */
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