1 | /* |
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2 | * Copyright (c) 1989, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #ifndef lint |
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35 | #if 0 |
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36 | static char sccsid[] = "@(#)display.c 8.1 (Berkeley) 6/6/93"; |
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37 | #endif |
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38 | #endif /* not lint */ |
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39 | #if 0 |
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40 | #include <sys/cdefs.h> |
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41 | __FBSDID("$FreeBSD: src/usr.bin/hexdump/display.c,v 1.22 2004/08/04 02:47:32 tjr Exp $"); |
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42 | #endif |
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43 | |
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44 | #include <sys/param.h> |
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45 | #include <sys/stat.h> |
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46 | |
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47 | #include <stdint.h> |
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48 | |
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49 | #include <ctype.h> |
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50 | #include <err.h> |
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51 | #include <errno.h> |
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52 | #include <stdio.h> |
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53 | #include <stdlib.h> |
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54 | #include <string.h> |
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55 | #include <unistd.h> |
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56 | #include "hexdump.h" |
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57 | |
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58 | #if RTEMS_REMOVED |
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59 | enum _vflag vflag = FIRST; |
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60 | |
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61 | static off_t address; /* address/offset in stream */ |
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62 | static off_t eaddress; /* end address */ |
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63 | #endif |
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64 | |
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65 | static void print(rtems_shell_hexdump_globals*, PR *, u_char *); |
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66 | |
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67 | void |
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68 | display(rtems_shell_hexdump_globals* globals) |
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69 | { |
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70 | FS *fs; |
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71 | FU *fu; |
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72 | PR *pr; |
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73 | int cnt; |
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74 | u_char *bp; |
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75 | off_t saveaddress; |
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76 | u_char savech, *savebp; |
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77 | |
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78 | savech = 0; |
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79 | while ((bp = get(globals))) |
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80 | for (fs = fshead, savebp = bp, saveaddress = address; fs; |
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81 | fs = fs->nextfs, bp = savebp, address = saveaddress) |
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82 | for (fu = fs->nextfu; fu; fu = fu->nextfu) { |
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83 | if (fu->flags&F_IGNORE) |
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84 | break; |
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85 | for (cnt = fu->reps; cnt; --cnt) |
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86 | for (pr = fu->nextpr; pr; address += pr->bcnt, |
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87 | bp += pr->bcnt, pr = pr->nextpr) { |
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88 | if (eaddress && address >= eaddress && |
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89 | !(pr->flags & (F_TEXT|F_BPAD))) |
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90 | bpad(pr); |
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91 | if (cnt == 1 && pr->nospace) { |
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92 | savech = *pr->nospace; |
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93 | *pr->nospace = '\0'; |
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94 | } |
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95 | print(globals, pr, bp); |
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96 | if (cnt == 1 && pr->nospace) |
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97 | *pr->nospace = savech; |
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98 | } |
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99 | } |
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100 | if (endfu) { |
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101 | /* |
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102 | * If eaddress not set, error or file size was multiple of |
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103 | * blocksize, and no partial block ever found. |
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104 | */ |
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105 | if (!eaddress) { |
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106 | if (!address) |
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107 | return; |
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108 | eaddress = address; |
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109 | } |
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110 | for (pr = endfu->nextpr; pr; pr = pr->nextpr) |
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111 | switch(pr->flags) { |
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112 | case F_ADDRESS: |
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113 | (void)printf(pr->fmt, (quad_t)eaddress); |
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114 | break; |
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115 | case F_TEXT: |
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116 | (void)printf("%s", pr->fmt); |
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117 | break; |
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118 | } |
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119 | } |
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120 | } |
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121 | |
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122 | static void |
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123 | print(rtems_shell_hexdump_globals* globals, PR *pr, u_char *bp) |
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124 | { |
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125 | long double ldbl; |
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126 | double f8; |
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127 | float f4; |
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128 | int16_t s2; |
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129 | int8_t s8; |
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130 | int32_t s4; |
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131 | u_int16_t u2; |
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132 | u_int32_t u4; |
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133 | u_int64_t u8; |
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134 | |
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135 | switch(pr->flags) { |
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136 | case F_ADDRESS: |
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137 | (void)printf(pr->fmt, (quad_t)address); |
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138 | break; |
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139 | case F_BPAD: |
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140 | (void)printf(pr->fmt, ""); |
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141 | break; |
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142 | case F_C: |
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143 | conv_c(globals, pr, bp, eaddress ? eaddress - address : |
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144 | blocksize - address % blocksize); |
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145 | break; |
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146 | case F_CHAR: |
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147 | (void)printf(pr->fmt, *bp); |
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148 | break; |
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149 | case F_DBL: |
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150 | switch(pr->bcnt) { |
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151 | case 4: |
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152 | bcopy(bp, &f4, sizeof(f4)); |
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153 | (void)printf(pr->fmt, f4); |
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154 | break; |
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155 | case 8: |
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156 | bcopy(bp, &f8, sizeof(f8)); |
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157 | (void)printf(pr->fmt, f8); |
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158 | break; |
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159 | default: |
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160 | if (pr->bcnt == sizeof(long double)) { |
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161 | bcopy(bp, &ldbl, sizeof(ldbl)); |
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162 | (void)printf(pr->fmt, ldbl); |
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163 | } |
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164 | break; |
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165 | } |
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166 | break; |
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167 | case F_INT: |
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168 | switch(pr->bcnt) { |
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169 | case 1: |
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170 | (void)printf(pr->fmt, (quad_t)(signed char)*bp); |
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171 | break; |
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172 | case 2: |
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173 | bcopy(bp, &s2, sizeof(s2)); |
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174 | (void)printf(pr->fmt, (quad_t)s2); |
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175 | break; |
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176 | case 4: |
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177 | bcopy(bp, &s4, sizeof(s4)); |
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178 | (void)printf(pr->fmt, (quad_t)s4); |
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179 | break; |
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180 | case 8: |
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181 | bcopy(bp, &s8, sizeof(s8)); |
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182 | (void)printf(pr->fmt, s8); |
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183 | break; |
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184 | } |
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185 | break; |
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186 | case F_P: |
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187 | (void)printf(pr->fmt, isprint(*bp) ? *bp : '.'); |
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188 | break; |
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189 | case F_STR: |
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190 | (void)printf(pr->fmt, (char *)bp); |
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191 | break; |
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192 | case F_TEXT: |
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193 | (void)printf("%s", pr->fmt); |
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194 | break; |
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195 | case F_U: |
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196 | conv_u(globals, pr, bp); |
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197 | break; |
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198 | case F_UINT: |
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199 | switch(pr->bcnt) { |
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200 | case 1: |
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201 | (void)printf(pr->fmt, (u_quad_t)*bp); |
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202 | break; |
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203 | case 2: |
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204 | bcopy(bp, &u2, sizeof(u2)); |
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205 | (void)printf(pr->fmt, (u_quad_t)u2); |
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206 | break; |
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207 | case 4: |
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208 | bcopy(bp, &u4, sizeof(u4)); |
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209 | (void)printf(pr->fmt, (u_quad_t)u4); |
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210 | break; |
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211 | case 8: |
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212 | bcopy(bp, &u8, sizeof(u8)); |
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213 | (void)printf(pr->fmt, u8); |
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214 | break; |
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215 | } |
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216 | break; |
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217 | } |
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218 | } |
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219 | |
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220 | void |
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221 | bpad(PR *pr) |
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222 | { |
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223 | static char const *spec = " -0+#"; |
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224 | char *p1, *p2; |
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225 | |
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226 | /* |
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227 | * Remove all conversion flags; '-' is the only one valid |
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228 | * with %s, and it's not useful here. |
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229 | */ |
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230 | pr->flags = F_BPAD; |
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231 | pr->cchar[0] = 's'; |
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232 | pr->cchar[1] = '\0'; |
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233 | for (p1 = pr->fmt; *p1 != '%'; ++p1); |
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234 | for (p2 = ++p1; *p1 && index(spec, *p1); ++p1); |
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235 | while ((*p2++ = *p1++)); |
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236 | } |
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237 | |
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238 | static char **_argv; |
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239 | |
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240 | u_char * |
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241 | get(rtems_shell_hexdump_globals* globals) |
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242 | { |
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243 | #if RTEMS_REMOVED |
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244 | static int ateof = 1; |
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245 | static u_char *curp, *savp; |
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246 | #endif |
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247 | int n; |
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248 | int need, nread; |
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249 | int valid_save = 0; |
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250 | u_char *tmpp; |
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251 | |
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252 | if (!curp) { |
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253 | if ((curp = calloc(1, blocksize)) == NULL) |
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254 | err(exit_jump, 1, NULL); |
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255 | if ((savp = calloc(1, blocksize)) == NULL) |
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256 | err(exit_jump, 1, NULL); |
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257 | } else { |
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258 | tmpp = curp; |
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259 | curp = savp; |
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260 | savp = tmpp; |
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261 | address += blocksize; |
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262 | valid_save = 1; |
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263 | } |
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264 | for (need = blocksize, nread = 0;;) { |
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265 | /* |
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266 | * if read the right number of bytes, or at EOF for one file, |
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267 | * and no other files are available, zero-pad the rest of the |
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268 | * block and set the end flag. |
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269 | */ |
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270 | if (!length || (ateof && !next(globals, (char **)NULL))) { |
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271 | if (odmode && address < skip) |
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272 | errx(exit_jump, 1, "cannot skip past end of input"); |
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273 | if (need == blocksize) |
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274 | return((u_char *)NULL); |
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275 | /* |
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276 | * XXX bcmp() is not quite right in the presence |
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277 | * of multibyte characters. |
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278 | */ |
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279 | if (vflag != ALL && |
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280 | valid_save && |
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281 | bcmp(curp, savp, nread) == 0) { |
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282 | if (vflag != DUP) |
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283 | (void)printf("*\n"); |
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284 | return((u_char *)NULL); |
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285 | } |
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286 | bzero((char *)curp + nread, need); |
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287 | eaddress = address + nread; |
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288 | return(curp); |
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289 | } |
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290 | n = fread((char *)curp + nread, sizeof(u_char), |
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291 | length == -1 ? need : MIN(length, need), hdstdin); |
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292 | if (!n) { |
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293 | if (ferror(hdstdin)) |
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294 | warn("%s", _argv[-1]); |
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295 | ateof = 1; |
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296 | continue; |
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297 | } |
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298 | ateof = 0; |
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299 | if (length != -1) |
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300 | length -= n; |
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301 | if (!(need -= n)) { |
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302 | /* |
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303 | * XXX bcmp() is not quite right in the presence |
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304 | * of multibyte characters. |
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305 | */ |
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306 | if (vflag == ALL || vflag == FIRST || |
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307 | valid_save == 0 || |
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308 | bcmp(curp, savp, blocksize) != 0) { |
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309 | if (vflag == DUP || vflag == FIRST) |
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310 | vflag = WAIT; |
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311 | return(curp); |
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312 | } |
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313 | if (vflag == WAIT) |
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314 | (void)printf("*\n"); |
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315 | vflag = DUP; |
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316 | address += blocksize; |
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317 | need = blocksize; |
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318 | nread = 0; |
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319 | } |
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320 | else |
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321 | nread += n; |
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322 | } |
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323 | } |
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324 | |
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325 | size_t |
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326 | peek(rtems_shell_hexdump_globals* globals, u_char *buf, size_t nbytes) |
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327 | { |
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328 | size_t n, nread; |
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329 | int c; |
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330 | |
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331 | if (length != -1 && nbytes > (unsigned int)length) |
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332 | nbytes = length; |
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333 | nread = 0; |
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334 | while (nread < nbytes && (c = getchar()) != EOF) { |
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335 | *buf++ = c; |
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336 | nread++; |
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337 | } |
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338 | n = nread; |
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339 | while (n-- > 0) { |
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340 | c = *--buf; |
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341 | ungetc(c, hdstdin); |
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342 | } |
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343 | return (nread); |
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344 | } |
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345 | |
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346 | int |
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347 | next(rtems_shell_hexdump_globals* globals, char **argv) |
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348 | { |
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349 | #if RTEMS_REMOVED |
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350 | static int done; |
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351 | #endif |
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352 | int statok; |
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353 | |
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354 | if (argv) { |
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355 | _argv = argv; |
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356 | return(1); |
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357 | } |
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358 | for (;;) { |
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359 | if (*_argv) { |
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360 | done = 1; |
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361 | if (!hdstdin) { |
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362 | hdstdin = malloc(sizeof(FILE)); |
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363 | if (!hdstdin) |
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364 | { |
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365 | errno = ENOMEM; |
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366 | err(exit_jump, 1, "file name allocation"); |
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367 | } |
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368 | memset (hdstdin, 0, sizeof(FILE)); |
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369 | } |
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370 | if (!(hdstdin = freopen(*_argv, "r", hdstdin))) { |
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371 | warn("%s", *_argv); |
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372 | exitval = 1; |
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373 | ++_argv; |
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374 | continue; |
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375 | } |
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376 | statok = 1; |
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377 | } else { |
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378 | errno = ECANCELED; |
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379 | err(exit_jump, 1, "no file (stdin no supported)"); |
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380 | if (done++) |
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381 | return(0); |
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382 | statok = 0; |
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383 | } |
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384 | if (skip) |
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385 | doskip(globals, statok ? *_argv : "stdin", statok); |
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386 | if (*_argv) |
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387 | ++_argv; |
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388 | if (!skip) |
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389 | return(1); |
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390 | } |
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391 | /* NOTREACHED */ |
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392 | } |
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393 | |
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394 | void |
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395 | doskip(rtems_shell_hexdump_globals* globals, const char *fname, int statok) |
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396 | { |
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397 | int cnt; |
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398 | struct stat sb; |
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399 | |
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400 | if (statok) { |
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401 | if (fstat(fileno(hdstdin), &sb)) |
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402 | err(exit_jump, 1, "%s", fname); |
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403 | /* can seek block devices on RTEMS */ |
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404 | if (0 && S_ISREG(sb.st_mode) && skip >= sb.st_size) { |
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405 | address += sb.st_size; |
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406 | skip -= sb.st_size; |
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407 | return; |
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408 | } |
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409 | if (1 || S_ISREG(sb.st_mode)) { |
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410 | if (fseeko(hdstdin, skip, SEEK_SET)) |
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411 | err(exit_jump, 1, "%s", fname); |
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412 | address += skip; |
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413 | skip = 0; |
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414 | } else { |
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415 | for (cnt = 0; cnt < skip; ++cnt) |
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416 | if (getchar() == EOF) |
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417 | break; |
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418 | address += cnt; |
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419 | skip -= cnt; |
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420 | } |
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421 | } |
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422 | } |
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