1 | /*
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2 | * od implementation for busybox
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3 | * Based on code from util-linux v 2.11l
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4 | *
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5 | * Copyright (c) 1990
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6 | * The Regents of the University of California. All rights reserved.
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7 | *
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8 | * This program is free software; you can redistribute it and/or modify
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9 | * it under the terms of the GNU General Public License as published by
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10 | * the Free Software Foundation; either version 2 of the License, or
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11 | * (at your option) any later version.
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12 | *
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13 | * This program is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 | * General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with this program; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 | *
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22 | * Original copyright notice is retained at the end of this file.
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23 | */
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24 |
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25 | #include <ctype.h>
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26 | #include <string.h>
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27 | #include <getopt.h>
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28 | #include <stdlib.h>
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29 | #include "busybox.h"
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30 | #include "dump.h"
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31 |
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32 | #define isdecdigit(c) (isdigit)(c)
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33 | #define ishexdigit(c) (isxdigit)(c)
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34 |
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35 | static void
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36 | odoffset(int argc, char ***argvp)
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37 | {
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38 | register char *num, *p;
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39 | int base;
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40 | char *end;
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41 |
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42 | /*
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43 | * The offset syntax of od(1) was genuinely bizarre. First, if
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44 | * it started with a plus it had to be an offset. Otherwise, if
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45 | * there were at least two arguments, a number or lower-case 'x'
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46 | * followed by a number makes it an offset. By default it was
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47 | * octal; if it started with 'x' or '0x' it was hex. If it ended
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48 | * in a '.', it was decimal. If a 'b' or 'B' was appended, it
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49 | * multiplied the number by 512 or 1024 byte units. There was
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50 | * no way to assign a block count to a hex offset.
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51 | *
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52 | * We assumes it's a file if the offset is bad.
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53 | */
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54 | p = **argvp;
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55 |
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56 | if (!p) {
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57 | /* hey someone is probably piping to us ... */
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58 | return;
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59 | }
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60 |
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61 | if ((*p != '+')
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62 | && (argc < 2
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63 | || (!isdecdigit(p[0])
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64 | && ((p[0] != 'x') || !ishexdigit(p[1])))))
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65 | return;
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66 |
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67 | base = 0;
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68 | /*
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69 | * bb_dump_skip over leading '+', 'x[0-9a-fA-f]' or '0x', and
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70 | * set base.
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71 | */
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72 | if (p[0] == '+')
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73 | ++p;
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74 | if (p[0] == 'x' && ishexdigit(p[1])) {
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75 | ++p;
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76 | base = 16;
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77 | } else if (p[0] == '0' && p[1] == 'x') {
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78 | p += 2;
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79 | base = 16;
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80 | }
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81 |
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82 | /* bb_dump_skip over the number */
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83 | if (base == 16)
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84 | for (num = p; ishexdigit(*p); ++p);
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85 | else
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86 | for (num = p; isdecdigit(*p); ++p);
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87 |
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88 | /* check for no number */
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89 | if (num == p)
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90 | return;
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91 |
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92 | /* if terminates with a '.', base is decimal */
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93 | if (*p == '.') {
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94 | if (base)
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95 | return;
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96 | base = 10;
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97 | }
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98 |
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99 | bb_dump_skip = strtol(num, &end, base ? base : 8);
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100 |
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101 | /* if end isn't the same as p, we got a non-octal digit */
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102 | if (end != p)
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103 | bb_dump_skip = 0;
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104 | else {
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105 | if (*p) {
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106 | if (*p == 'b') {
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107 | bb_dump_skip *= 512;
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108 | ++p;
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109 | } else if (*p == 'B') {
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110 | bb_dump_skip *= 1024;
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111 | ++p;
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112 | }
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113 | }
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114 | if (*p)
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115 | bb_dump_skip = 0;
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116 | else {
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117 | ++*argvp;
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118 | /*
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119 | * If the offset uses a non-octal base, the base of
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120 | * the offset is changed as well. This isn't pretty,
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121 | * but it's easy.
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122 | */
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123 | #define TYPE_OFFSET 7
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124 | {
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125 | char x_or_d;
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126 | if (base == 16) {
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127 | x_or_d = 'x';
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128 | goto DO_X_OR_D;
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129 | }
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130 | if (base == 10) {
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131 | x_or_d = 'd';
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132 | DO_X_OR_D:
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133 | bb_dump_fshead->nextfu->fmt[TYPE_OFFSET]
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134 | = bb_dump_fshead->nextfs->nextfu->fmt[TYPE_OFFSET]
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135 | = x_or_d;
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136 | }
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137 | }
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138 | }
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139 | }
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140 | }
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141 |
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142 | static const char * const add_strings[] = {
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143 | "16/1 \"%3_u \" \"\\n\"", /* a */
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144 | "8/2 \" %06o \" \"\\n\"", /* B, o */
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145 | "16/1 \"%03o \" \"\\n\"", /* b */
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146 | "16/1 \"%3_c \" \"\\n\"", /* c */
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147 | "8/2 \" %05u \" \"\\n\"", /* d */
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148 | "4/4 \" %010u \" \"\\n\"", /* D */
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149 | "2/8 \" %21.14e \" \"\\n\"", /* e (undocumented in od), F */
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150 | "4/4 \" %14.7e \" \"\\n\"", /* f */
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151 | "4/4 \" %08x \" \"\\n\"", /* H, X */
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152 | "8/2 \" %04x \" \"\\n\"", /* h, x */
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153 | "4/4 \" %11d \" \"\\n\"", /* I, L, l */
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154 | "8/2 \" %6d \" \"\\n\"", /* i */
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155 | "4/4 \" %011o \" \"\\n\"", /* O */
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156 | };
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157 |
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158 | static const char od_opts[] = "aBbcDdeFfHhIiLlOoXxv";
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159 |
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160 | static const char od_o2si[] = {
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161 | 0, 1, 2, 3, 5,
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162 | 4, 6, 6, 7, 8,
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163 | 9, 0xa, 0xb, 0xa, 0xa,
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164 | 0xb, 1, 8, 9,
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165 | };
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166 |
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167 | int od_main(int argc, char **argv)
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168 | {
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169 | int ch;
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170 | int first = 1;
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171 | char *p;
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172 | bb_dump_vflag = FIRST;
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173 | bb_dump_length = -1;
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174 |
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175 | while ((ch = getopt(argc, argv, od_opts)) > 0) {
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176 | if (ch == 'v') {
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177 | bb_dump_vflag = ALL;
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178 | } else if (((p = strchr(od_opts, ch)) != NULL) && (*p != '\0')) {
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179 | if (first) {
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180 | first = 0;
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181 | bb_dump_add("\"%07.7_Ao\n\"");
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182 | bb_dump_add("\"%07.7_ao \"");
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183 | } else {
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184 | bb_dump_add("\" \"");
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185 | }
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186 | bb_dump_add(add_strings[(int)od_o2si[(p-od_opts)]]);
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187 | } else { /* P, p, s, w, or other unhandled */
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188 | bb_show_usage();
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189 | }
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190 | }
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191 | if (!bb_dump_fshead) {
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192 | bb_dump_add("\"%07.7_Ao\n\"");
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193 | bb_dump_add("\"%07.7_ao \" 8/2 \"%06o \" \"\\n\"");
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194 | }
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195 |
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196 | argc -= optind;
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197 | argv += optind;
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198 |
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199 | odoffset(argc, &argv);
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200 |
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201 | return(bb_dump_dump(argv));
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202 | }
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203 |
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204 | /*-
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205 | * Copyright (c) 1990 The Regents of the University of California.
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206 | * All rights reserved.
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207 | *
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208 | * Redistribution and use in source and binary forms, with or without
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209 | * modification, are permitted provided that the following conditions
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210 | * are met:
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211 | * 1. Redistributions of source code must retain the above copyright
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212 | * notice, this list of conditions and the following disclaimer.
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213 | * 2. Redistributions in binary form must reproduce the above copyright
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214 | * notice, this list of conditions and the following disclaimer in the
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215 | * documentation and/or other materials provided with the distribution.
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216 | * 3. Neither the name of the University nor the names of its contributors
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217 | * may be used to endorse or promote products derived from this software
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218 | * without specific prior written permission.
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219 | *
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220 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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221 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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222 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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223 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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224 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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225 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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226 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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227 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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228 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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229 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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230 | * SUCH DAMAGE.
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231 | */
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