1 | /*- |
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2 | * Copyright (c) 1991, 1993, 1994 |
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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 | * This code is derived from software contributed to Berkeley by |
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6 | * Keith Muller of the University of California, San Diego and Lance |
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7 | * Visser of Convex Computer Corporation. |
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8 | * |
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9 | * Redistribution and use in source and binary forms, with or without |
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10 | * modification, are permitted provided that the following conditions |
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11 | * are met: |
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12 | * 1. Redistributions of source code must retain the above copyright |
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13 | * notice, this list of conditions and the following disclaimer. |
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14 | * 2. Redistributions in binary form must reproduce the above copyright |
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15 | * notice, this list of conditions and the following disclaimer in the |
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16 | * documentation and/or other materials provided with the distribution. |
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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 | #ifdef HAVE_CONFIG_H |
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35 | #include "config.h" |
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36 | #endif |
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37 | |
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38 | #if 0 |
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39 | #ifndef lint |
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40 | static char const copyright[] = |
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41 | "@(#) Copyright (c) 1991, 1993, 1994\n\ |
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42 | The Regents of the University of California. All rights reserved.\n"; |
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43 | #endif /* not lint */ |
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44 | |
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45 | #ifndef lint |
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46 | static char sccsid[] = "@(#)dd.c 8.5 (Berkeley) 4/2/94"; |
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47 | #endif /* not lint */ |
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48 | #include <sys/cdefs.h> |
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49 | __FBSDID("$FreeBSD: src/bin/dd/dd.c,v 1.43 2004/08/15 19:10:05 rwatson Exp $"); |
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50 | #endif |
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51 | |
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52 | #include <rtems.h> |
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53 | #include <rtems/shell.h> |
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54 | #include <rtems/shellconfig.h> |
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55 | |
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56 | #include <sys/param.h> |
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57 | #include <sys/stat.h> |
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58 | #if RTEMS_REMOVED |
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59 | #include <sys/conf.h> |
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60 | #include <sys/disklabel.h> |
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61 | #endif |
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62 | #include <sys/filio.h> |
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63 | #include <sys/time.h> |
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64 | |
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65 | #include <ctype.h> |
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66 | #include <err.h> |
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67 | #include <errno.h> |
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68 | #include <fcntl.h> |
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69 | #include <inttypes.h> |
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70 | #include <locale.h> |
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71 | #include <stdio.h> |
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72 | #include <stdlib.h> |
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73 | #include <string.h> |
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74 | #include <unistd.h> |
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75 | |
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76 | #include "dd.h" |
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77 | #include "extern-dd.h" |
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78 | |
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79 | #ifndef __unused |
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80 | #define __unused __attribute((__unused__)) |
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81 | #endif |
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82 | |
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83 | #define DD_DEFFILEMODE 0 |
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84 | |
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85 | static void dd_close(rtems_shell_dd_globals* globals); |
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86 | static void dd_in(rtems_shell_dd_globals* globals); |
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87 | static void getfdtype(rtems_shell_dd_globals* globals, IO *); |
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88 | static void setup(rtems_shell_dd_globals* globals); |
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89 | |
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90 | #if RTEMS_REMOVED |
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91 | IO in, out; /* input/output state */ |
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92 | STAT st; /* statistics */ |
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93 | void (*cfunc)(void); /* conversion function */ |
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94 | uintmax_t cpy_cnt; /* # of blocks to copy */ |
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95 | static off_t pending = 0; /* pending seek if sparse */ |
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96 | u_int ddflags = 0; /* conversion options */ |
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97 | size_t cbsz; /* conversion block size */ |
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98 | uintmax_t files_cnt = 1; /* # of files to copy */ |
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99 | const u_char *ctab; /* conversion table */ |
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100 | char fill_char; /* Character to fill with if defined */ |
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101 | #endif |
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102 | |
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103 | static off_t pending = 0; /* pending seek if sparse */ |
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104 | |
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105 | void |
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106 | rtems_shell_dd_exit (rtems_shell_dd_globals* globals, int code) |
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107 | { |
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108 | globals->exit_code = code; |
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109 | longjmp (globals->exit_jmp, 1); |
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110 | } |
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111 | |
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112 | static int main_dd(rtems_shell_dd_globals* globals, int argc, char *argv[]); |
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113 | |
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114 | static int |
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115 | rtems_shell_main_dd(int argc, char *argv[]) |
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116 | { |
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117 | rtems_shell_dd_globals dd_globals; |
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118 | rtems_shell_dd_globals* globals = &dd_globals; |
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119 | memset (globals, 0, sizeof (dd_globals)); |
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120 | pending = 0; |
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121 | ddflags = 0; |
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122 | files_cnt = 1; |
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123 | dd_globals.exit_code = 1; |
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124 | if (setjmp (dd_globals.exit_jmp) == 0) |
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125 | dd_globals.exit_code = main_dd (globals, argc, argv); |
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126 | if (in.fd) |
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127 | close(in.fd); |
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128 | if (out.fd) |
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129 | close(out.fd); |
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130 | if (in.name) |
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131 | free((void*)in.name); |
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132 | if (out.name) |
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133 | free((void*)out.name); |
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134 | if (in.db) |
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135 | free(in.db); |
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136 | if (out.db && (in.db != out.db)) |
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137 | free(out.db); |
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138 | return dd_globals.exit_code; |
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139 | } |
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140 | |
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141 | int |
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142 | main_dd(rtems_shell_dd_globals* globals, int argc __unused, char *argv[]) |
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143 | { |
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144 | (void)setlocale(LC_CTYPE, ""); |
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145 | jcl(globals, argv); |
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146 | setup(globals); |
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147 | |
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148 | #if RTEMS_REMOVED |
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149 | (void)signal(SIGINFO, summaryx); |
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150 | (void)signal(SIGINT, terminate); |
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151 | |
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152 | atexit(summary); |
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153 | #endif |
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154 | |
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155 | while (files_cnt--) |
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156 | dd_in(globals); |
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157 | |
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158 | dd_close(globals); |
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159 | exit(0); |
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160 | /* NOTREACHED */ |
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161 | return 0; |
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162 | } |
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163 | |
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164 | static int |
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165 | parity(u_char c) |
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166 | { |
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167 | int i; |
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168 | |
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169 | i = c ^ (c >> 1) ^ (c >> 2) ^ (c >> 3) ^ |
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170 | (c >> 4) ^ (c >> 5) ^ (c >> 6) ^ (c >> 7); |
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171 | return (i & 1); |
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172 | } |
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173 | |
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174 | static void |
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175 | setup(rtems_shell_dd_globals* globals) |
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176 | { |
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177 | u_int cnt; |
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178 | struct timeval tv; |
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179 | |
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180 | if (in.name == NULL) { |
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181 | in.name = "stdin"; |
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182 | in.fd = STDIN_FILENO; |
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183 | } else { |
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184 | in.fd = open(in.name, O_RDONLY, 0); |
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185 | if (in.fd == -1) |
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186 | err(exit_jump, 1, "%s", in.name); |
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187 | } |
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188 | |
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189 | getfdtype(globals, &in); |
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190 | |
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191 | if (files_cnt > 1 && !(in.flags & ISTAPE)) |
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192 | errx(exit_jump, 1, "files is not supported for non-tape devices"); |
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193 | |
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194 | if (out.name == NULL) { |
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195 | /* No way to check for read access here. */ |
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196 | out.fd = STDOUT_FILENO; |
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197 | out.name = "stdout"; |
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198 | } else { |
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199 | #define OFLAGS \ |
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200 | (O_CREAT | (ddflags & (C_SEEK | C_NOTRUNC) ? 0 : O_TRUNC)) |
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201 | out.fd = open(out.name, O_RDWR | OFLAGS, DD_DEFFILEMODE); |
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202 | /* |
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203 | * May not have read access, so try again with write only. |
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204 | * Without read we may have a problem if output also does |
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205 | * not support seeks. |
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206 | */ |
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207 | if (out.fd == -1) { |
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208 | out.fd = open(out.name, O_WRONLY | OFLAGS, DD_DEFFILEMODE); |
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209 | out.flags |= NOREAD; |
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210 | } |
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211 | if (out.fd == -1) |
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212 | err(exit_jump, 1, "%s", out.name); |
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213 | } |
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214 | |
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215 | getfdtype(globals, &out); |
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216 | |
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217 | /* |
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218 | * Allocate space for the input and output buffers. If not doing |
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219 | * record oriented I/O, only need a single buffer. |
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220 | */ |
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221 | if (!(ddflags & (C_BLOCK | C_UNBLOCK))) { |
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222 | if ((in.db = malloc(out.dbsz + in.dbsz - 1)) == NULL) |
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223 | err(exit_jump, 1, "input buffer"); |
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224 | out.db = in.db; |
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225 | } else if ((in.db = malloc(MAX(in.dbsz, cbsz) + cbsz)) == NULL || |
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226 | (out.db = malloc(out.dbsz + cbsz)) == NULL) |
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227 | err(exit_jump, 1, "output buffer"); |
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228 | in.dbp = in.db; |
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229 | out.dbp = out.db; |
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230 | |
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231 | /* Position the input/output streams. */ |
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232 | if (in.offset) |
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233 | pos_in(globals); |
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234 | if (out.offset) |
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235 | pos_out(globals); |
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236 | |
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237 | /* |
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238 | * Truncate the output file. If it fails on a type of output file |
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239 | * that it should _not_ fail on, error out. |
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240 | */ |
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241 | if ((ddflags & (C_OF | C_SEEK | C_NOTRUNC)) == (C_OF | C_SEEK) && |
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242 | out.flags & ISTRUNC) |
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243 | if (ftruncate(out.fd, out.offset * out.dbsz) == -1) |
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244 | err(exit_jump, 1, "truncating %s", out.name); |
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245 | |
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246 | if (ddflags & (C_LCASE | C_UCASE | C_ASCII | C_EBCDIC | C_PARITY)) { |
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247 | if (ctab != NULL) { |
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248 | for (cnt = 0; cnt <= 0377; ++cnt) |
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249 | casetab[cnt] = ctab[cnt]; |
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250 | } else { |
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251 | for (cnt = 0; cnt <= 0377; ++cnt) |
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252 | casetab[cnt] = cnt; |
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253 | } |
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254 | if ((ddflags & C_PARITY) && !(ddflags & C_ASCII)) { |
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255 | /* |
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256 | * If the input is not EBCDIC, and we do parity |
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257 | * processing, strip input parity. |
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258 | */ |
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259 | for (cnt = 200; cnt <= 0377; ++cnt) |
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260 | casetab[cnt] = casetab[cnt & 0x7f]; |
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261 | } |
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262 | if (ddflags & C_LCASE) { |
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263 | for (cnt = 0; cnt <= 0377; ++cnt) |
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264 | casetab[cnt] = tolower(casetab[cnt]); |
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265 | } else if (ddflags & C_UCASE) { |
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266 | for (cnt = 0; cnt <= 0377; ++cnt) |
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267 | casetab[cnt] = toupper(casetab[cnt]); |
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268 | } |
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269 | if ((ddflags & C_PARITY)) { |
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270 | /* |
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271 | * This should strictly speaking be a no-op, but I |
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272 | * wonder what funny LANG settings could get us. |
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273 | */ |
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274 | for (cnt = 0; cnt <= 0377; ++cnt) |
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275 | casetab[cnt] = casetab[cnt] & 0x7f; |
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276 | } |
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277 | if ((ddflags & C_PARSET)) { |
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278 | for (cnt = 0; cnt <= 0377; ++cnt) |
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279 | casetab[cnt] = casetab[cnt] | 0x80; |
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280 | } |
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281 | if ((ddflags & C_PAREVEN)) { |
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282 | for (cnt = 0; cnt <= 0377; ++cnt) |
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283 | if (parity(casetab[cnt])) |
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284 | casetab[cnt] = casetab[cnt] | 0x80; |
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285 | } |
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286 | if ((ddflags & C_PARODD)) { |
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287 | for (cnt = 0; cnt <= 0377; ++cnt) |
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288 | if (!parity(casetab[cnt])) |
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289 | casetab[cnt] = casetab[cnt] | 0x80; |
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290 | } |
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291 | |
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292 | ctab = casetab; |
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293 | } |
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294 | |
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295 | (void)gettimeofday(&tv, (struct timezone *)NULL); |
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296 | st.start = tv.tv_sec + tv.tv_usec * 1e-6; |
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297 | } |
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298 | |
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299 | static void |
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300 | getfdtype(rtems_shell_dd_globals* globals, IO *io) |
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301 | { |
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302 | struct stat sb; |
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303 | #if RTEMS_REMOVED |
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304 | int type; |
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305 | #endif |
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306 | |
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307 | if (fstat(io->fd, &sb) == -1) |
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308 | err(exit_jump, 1, "%s", io->name); |
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309 | if (S_ISREG(sb.st_mode)) |
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310 | io->flags |= ISTRUNC; |
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311 | #if RTEMS_REMOVED |
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312 | if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) { |
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313 | if (ioctl(io->fd, FIODTYPE, &type) == -1) { |
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314 | err(exit_jump, 1, "%s", io->name); |
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315 | } else { |
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316 | if (type & D_TAPE) |
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317 | io->flags |= ISTAPE; |
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318 | else if (type & (D_DISK | D_MEM)) |
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319 | io->flags |= ISSEEK; |
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320 | if (S_ISCHR(sb.st_mode) && (type & D_TAPE) == 0) |
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321 | io->flags |= ISCHR; |
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322 | } |
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323 | return; |
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324 | } |
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325 | #else |
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326 | io->flags |= ISSEEK; |
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327 | #endif |
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328 | errno = 0; |
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329 | if (lseek(io->fd, (off_t)0, SEEK_CUR) == -1 && errno == ESPIPE) |
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330 | io->flags |= ISPIPE; |
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331 | else |
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332 | io->flags |= ISSEEK; |
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333 | } |
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334 | |
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335 | static void |
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336 | dd_in(rtems_shell_dd_globals* globals) |
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337 | { |
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338 | ssize_t n; |
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339 | |
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340 | for (;;) { |
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341 | switch (cpy_cnt) { |
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342 | case -1: /* count=0 was specified */ |
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343 | return; |
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344 | case 0: |
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345 | break; |
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346 | default: |
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347 | if (st.in_full + st.in_part >= (uintmax_t)cpy_cnt) |
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348 | return; |
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349 | break; |
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350 | } |
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351 | |
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352 | /* |
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353 | * Zero the buffer first if sync; if doing block operations, |
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354 | * use spaces. |
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355 | */ |
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356 | if (ddflags & C_SYNC) { |
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357 | if (ddflags & C_FILL) |
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358 | memset(in.dbp, fill_char, in.dbsz); |
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359 | else if (ddflags & (C_BLOCK | C_UNBLOCK)) |
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360 | memset(in.dbp, ' ', in.dbsz); |
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361 | else |
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362 | memset(in.dbp, 0, in.dbsz); |
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363 | } |
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364 | |
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365 | n = read(in.fd, in.dbp, in.dbsz); |
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366 | if (n == 0) { |
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367 | in.dbrcnt = 0; |
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368 | return; |
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369 | } |
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370 | |
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371 | /* Read error. */ |
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372 | if (n == -1) { |
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373 | /* |
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374 | * If noerror not specified, die. POSIX requires that |
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375 | * the warning message be followed by an I/O display. |
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376 | */ |
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377 | if (!(ddflags & C_NOERROR)) |
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378 | err(exit_jump, 1, "%s", in.name); |
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379 | warn("%s", in.name); |
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380 | summary(globals); |
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381 | |
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382 | /* |
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383 | * If it's a seekable file descriptor, seek past the |
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384 | * error. If your OS doesn't do the right thing for |
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385 | * raw disks this section should be modified to re-read |
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386 | * in sector size chunks. |
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387 | */ |
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388 | if (in.flags & ISSEEK && |
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389 | lseek(in.fd, (off_t)in.dbsz, SEEK_CUR)) |
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390 | warn("%s", in.name); |
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391 | |
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392 | /* If sync not specified, omit block and continue. */ |
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393 | if (!(ddflags & C_SYNC)) |
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394 | continue; |
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395 | |
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396 | /* Read errors count as full blocks. */ |
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397 | in.dbcnt += in.dbrcnt = in.dbsz; |
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398 | ++st.in_full; |
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399 | |
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400 | /* Handle full input blocks. */ |
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401 | } else if ((size_t)n == in.dbsz) { |
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402 | in.dbcnt += in.dbrcnt = n; |
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403 | ++st.in_full; |
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404 | |
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405 | /* Handle partial input blocks. */ |
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406 | } else { |
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407 | /* If sync, use the entire block. */ |
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408 | if (ddflags & C_SYNC) |
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409 | in.dbcnt += in.dbrcnt = in.dbsz; |
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410 | else |
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411 | in.dbcnt += in.dbrcnt = n; |
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412 | ++st.in_part; |
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413 | } |
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414 | |
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415 | /* |
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416 | * POSIX states that if bs is set and no other conversions |
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417 | * than noerror, notrunc or sync are specified, the block |
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418 | * is output without buffering as it is read. |
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419 | */ |
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420 | if (ddflags & C_BS) { |
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421 | out.dbcnt = in.dbcnt; |
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422 | dd_out(globals, 1); |
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423 | in.dbcnt = 0; |
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424 | continue; |
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425 | } |
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426 | |
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427 | if (ddflags & C_SWAB) { |
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428 | if ((n = in.dbrcnt) & 1) { |
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429 | ++st.swab; |
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430 | --n; |
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431 | } |
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432 | swab(in.dbp, in.dbp, (size_t)n); |
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433 | } |
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434 | |
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435 | in.dbp += in.dbrcnt; |
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436 | (*cfunc)(globals); |
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437 | } |
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438 | } |
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439 | |
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440 | /* |
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441 | * Clean up any remaining I/O and flush output. If necessary, the output file |
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442 | * is truncated. |
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443 | */ |
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444 | static void |
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445 | dd_close(rtems_shell_dd_globals* globals) |
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446 | { |
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447 | if (cfunc == def) |
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448 | def_close(globals); |
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449 | else if (cfunc == block) |
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450 | block_close(globals); |
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451 | else if (cfunc == unblock) |
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452 | unblock_close(globals); |
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453 | if (ddflags & C_OSYNC && out.dbcnt && out.dbcnt < out.dbsz) { |
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454 | if (ddflags & C_FILL) |
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455 | memset(out.dbp, fill_char, out.dbsz - out.dbcnt); |
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456 | else if (ddflags & (C_BLOCK | C_UNBLOCK)) |
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457 | memset(out.dbp, ' ', out.dbsz - out.dbcnt); |
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458 | else |
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459 | memset(out.dbp, 0, out.dbsz - out.dbcnt); |
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460 | out.dbcnt = out.dbsz; |
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461 | } |
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462 | if (out.dbcnt || pending) |
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463 | dd_out(globals, 1); |
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464 | } |
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465 | |
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466 | void |
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467 | dd_out(rtems_shell_dd_globals* globals, int force) |
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468 | { |
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469 | u_char *outp; |
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470 | size_t cnt, i, n; |
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471 | ssize_t nw; |
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472 | static int warned; |
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473 | int sparse; |
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474 | |
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475 | /* |
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476 | * Write one or more blocks out. The common case is writing a full |
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477 | * output block in a single write; increment the full block stats. |
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478 | * Otherwise, we're into partial block writes. If a partial write, |
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479 | * and it's a character device, just warn. If a tape device, quit. |
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480 | * |
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481 | * The partial writes represent two cases. 1: Where the input block |
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482 | * was less than expected so the output block was less than expected. |
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483 | * 2: Where the input block was the right size but we were forced to |
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484 | * write the block in multiple chunks. The original versions of dd(1) |
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485 | * never wrote a block in more than a single write, so the latter case |
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486 | * never happened. |
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487 | * |
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488 | * One special case is if we're forced to do the write -- in that case |
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489 | * we play games with the buffer size, and it's usually a partial write. |
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490 | */ |
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491 | outp = out.db; |
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492 | for (n = force ? out.dbcnt : out.dbsz;; n = out.dbsz) { |
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493 | for (cnt = n;; cnt -= nw) { |
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494 | sparse = 0; |
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495 | if (ddflags & C_SPARSE) { |
---|
496 | sparse = 1; /* Is buffer sparse? */ |
---|
497 | for (i = 0; i < cnt; i++) |
---|
498 | if (outp[i] != 0) { |
---|
499 | sparse = 0; |
---|
500 | break; |
---|
501 | } |
---|
502 | } |
---|
503 | if (sparse && !force) { |
---|
504 | pending += cnt; |
---|
505 | nw = cnt; |
---|
506 | } else { |
---|
507 | if (pending != 0) { |
---|
508 | if (force) |
---|
509 | pending--; |
---|
510 | if (lseek(out.fd, pending, SEEK_CUR) == |
---|
511 | -1) |
---|
512 | err(exit_jump, 2, "%s: seek error creating sparse file", |
---|
513 | out.name); |
---|
514 | if (force) |
---|
515 | write(out.fd, outp, 1); |
---|
516 | pending = 0; |
---|
517 | } |
---|
518 | if (cnt) |
---|
519 | nw = write(out.fd, outp, cnt); |
---|
520 | else |
---|
521 | return; |
---|
522 | } |
---|
523 | |
---|
524 | if (nw <= 0) { |
---|
525 | if (nw == 0) |
---|
526 | errx(exit_jump, 1, "%s: end of device", out.name); |
---|
527 | if (errno != EINTR) |
---|
528 | err(exit_jump, 1, "%s", out.name); |
---|
529 | nw = 0; |
---|
530 | } |
---|
531 | outp += nw; |
---|
532 | st.bytes += nw; |
---|
533 | if ((size_t)nw == n) { |
---|
534 | if (n != out.dbsz) |
---|
535 | ++st.out_part; |
---|
536 | else |
---|
537 | ++st.out_full; |
---|
538 | break; |
---|
539 | } |
---|
540 | ++st.out_part; |
---|
541 | if ((size_t)nw == cnt) |
---|
542 | break; |
---|
543 | if (out.flags & ISTAPE) |
---|
544 | errx(exit_jump, 1, "%s: short write on tape device", |
---|
545 | out.name); |
---|
546 | if (out.flags & ISCHR && !warned) { |
---|
547 | warned = 1; |
---|
548 | warnx("%s: short write on character device", |
---|
549 | out.name); |
---|
550 | } |
---|
551 | } |
---|
552 | if ((out.dbcnt -= n) < out.dbsz) |
---|
553 | break; |
---|
554 | } |
---|
555 | |
---|
556 | /* Reassemble the output block. */ |
---|
557 | if (out.dbcnt) |
---|
558 | (void)memmove(out.db, out.dbp - out.dbcnt, out.dbcnt); |
---|
559 | out.dbp = out.db + out.dbcnt; |
---|
560 | } |
---|
561 | |
---|
562 | rtems_shell_cmd_t rtems_shell_DD_Command = { |
---|
563 | "dd", /* name */ |
---|
564 | "dd [OPERAND]...", /* usage */ |
---|
565 | "files", /* topic */ |
---|
566 | rtems_shell_main_dd, /* command */ |
---|
567 | NULL, /* alias */ |
---|
568 | NULL /* next */ |
---|
569 | }; |
---|