[1765] | 1 | /* od -- dump files in octal and other formats
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| 2 | Copyright (C) 92, 1995-2004 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software Foundation,
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| 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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| 17 |
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| 18 | /* Written by Jim Meyering. */
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| 19 |
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| 20 | /* Busyboxed by Denis Vlasenko
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| 21 |
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| 22 | Based on od.c from coreutils-5.2.1
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| 23 | Top bloat sources:
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| 24 |
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| 25 | 00000073 t parse_old_offset
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| 26 | 0000007b t get_lcm
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| 27 | 00000090 r long_options
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| 28 | 00000092 t print_named_ascii
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| 29 | 000000bf t print_ascii
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| 30 | 00000168 t write_block
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| 31 | 00000366 t decode_format_string
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| 32 | 00000a71 T od_main
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| 33 |
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| 34 | Tested for compat with coreutils 6.3
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| 35 | using this script. Minor differences fixed.
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| 36 |
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| 37 | #!/bin/sh
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| 38 | echo STD
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| 39 | time /path/to/coreutils/od \
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| 40 | ...params... \
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| 41 | >std
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| 42 | echo Exit code $?
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| 43 | echo BBOX
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| 44 | time ./busybox od \
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| 45 | ...params... \
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| 46 | >bbox
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| 47 | echo Exit code $?
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| 48 | diff -u -a std bbox >bbox.diff || { echo Different!; sleep 1; }
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| 49 |
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| 50 | */
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| 51 |
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| 52 | #include "libbb.h"
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| 53 | #include <getopt.h>
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| 54 |
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| 55 | #define assert(a) ((void)0)
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| 56 |
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| 57 | /* Check for 0x7f is a coreutils 6.3 addition */
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| 58 | #define ISPRINT(c) (((c)>=' ') && (c) != 0x7f)
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| 59 |
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| 60 | typedef long double longdouble_t;
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| 61 | typedef unsigned long long ulonglong_t;
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| 62 | typedef long long llong;
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| 63 |
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| 64 | #if ENABLE_LFS
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| 65 | # define xstrtooff_sfx xstrtoull_sfx
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| 66 | #else
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| 67 | # define xstrtooff_sfx xstrtoul_sfx
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| 68 | #endif
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| 69 |
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| 70 | /* The default number of input bytes per output line. */
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| 71 | #define DEFAULT_BYTES_PER_BLOCK 16
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| 72 |
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| 73 | /* The number of decimal digits of precision in a float. */
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| 74 | #ifndef FLT_DIG
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| 75 | # define FLT_DIG 7
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| 76 | #endif
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| 77 |
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| 78 | /* The number of decimal digits of precision in a double. */
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| 79 | #ifndef DBL_DIG
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| 80 | # define DBL_DIG 15
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| 81 | #endif
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| 82 |
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| 83 | /* The number of decimal digits of precision in a long double. */
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| 84 | #ifndef LDBL_DIG
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| 85 | # define LDBL_DIG DBL_DIG
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| 86 | #endif
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| 87 |
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| 88 | enum size_spec {
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| 89 | NO_SIZE,
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| 90 | CHAR,
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| 91 | SHORT,
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| 92 | INT,
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| 93 | LONG,
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| 94 | LONG_LONG,
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| 95 | FLOAT_SINGLE,
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| 96 | FLOAT_DOUBLE,
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| 97 | FLOAT_LONG_DOUBLE,
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| 98 | N_SIZE_SPECS
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| 99 | };
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| 100 |
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| 101 | enum output_format {
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| 102 | SIGNED_DECIMAL,
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| 103 | UNSIGNED_DECIMAL,
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| 104 | OCTAL,
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| 105 | HEXADECIMAL,
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| 106 | FLOATING_POINT,
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| 107 | NAMED_CHARACTER,
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| 108 | CHARACTER
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| 109 | };
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| 110 |
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| 111 | /* Each output format specification (from '-t spec' or from
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| 112 | old-style options) is represented by one of these structures. */
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| 113 | struct tspec {
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| 114 | enum output_format fmt;
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| 115 | enum size_spec size;
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| 116 | void (*print_function) (size_t, const char *, const char *);
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| 117 | char *fmt_string;
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| 118 | int hexl_mode_trailer;
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| 119 | int field_width;
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| 120 | };
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| 121 |
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| 122 | /* Convert the number of 8-bit bytes of a binary representation to
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| 123 | the number of characters (digits + sign if the type is signed)
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| 124 | required to represent the same quantity in the specified base/type.
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| 125 | For example, a 32-bit (4-byte) quantity may require a field width
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| 126 | as wide as the following for these types:
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| 127 | 11 unsigned octal
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| 128 | 11 signed decimal
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| 129 | 10 unsigned decimal
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| 130 | 8 unsigned hexadecimal */
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| 131 |
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| 132 | static const uint8_t bytes_to_oct_digits[] ALIGN1 =
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| 133 | {0, 3, 6, 8, 11, 14, 16, 19, 22, 25, 27, 30, 32, 35, 38, 41, 43};
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| 134 |
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| 135 | static const uint8_t bytes_to_signed_dec_digits[] ALIGN1 =
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| 136 | {1, 4, 6, 8, 11, 13, 16, 18, 20, 23, 25, 28, 30, 33, 35, 37, 40};
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| 137 |
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| 138 | static const uint8_t bytes_to_unsigned_dec_digits[] ALIGN1 =
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| 139 | {0, 3, 5, 8, 10, 13, 15, 17, 20, 22, 25, 27, 29, 32, 34, 37, 39};
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| 140 |
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| 141 | static const uint8_t bytes_to_hex_digits[] ALIGN1 =
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| 142 | {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32};
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| 143 |
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| 144 | /* Convert enum size_spec to the size of the named type. */
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| 145 | static const signed char width_bytes[] ALIGN1 = {
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| 146 | -1,
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| 147 | sizeof(char),
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| 148 | sizeof(short),
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| 149 | sizeof(int),
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| 150 | sizeof(long),
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| 151 | sizeof(ulonglong_t),
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| 152 | sizeof(float),
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| 153 | sizeof(double),
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| 154 | sizeof(longdouble_t)
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| 155 | };
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| 156 | /* Ensure that for each member of 'enum size_spec' there is an
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| 157 | initializer in the width_bytes array. */
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| 158 | struct ERR_width_bytes_has_bad_size {
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| 159 | char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1];
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| 160 | };
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| 161 |
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| 162 | static smallint flag_dump_strings;
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| 163 | /* Non-zero if an old-style 'pseudo-address' was specified. */
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| 164 | static smallint flag_pseudo_start;
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| 165 | static smallint limit_bytes_to_format;
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| 166 | /* When zero and two or more consecutive blocks are equal, format
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| 167 | only the first block and output an asterisk alone on the following
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| 168 | line to indicate that identical blocks have been elided. */
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| 169 | static smallint verbose;
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| 170 | static smallint ioerror;
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| 171 |
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| 172 | static size_t string_min;
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| 173 |
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| 174 | /* An array of specs describing how to format each input block. */
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| 175 | static size_t n_specs;
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| 176 | static struct tspec *spec;
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| 177 |
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| 178 | /* Function that accepts an address and an optional following char,
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| 179 | and prints the address and char to stdout. */
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| 180 | static void (*format_address)(off_t, char);
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| 181 | /* The difference between the old-style pseudo starting address and
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| 182 | the number of bytes to skip. */
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| 183 | static off_t pseudo_offset;
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| 184 | /* The number of input bytes to skip before formatting and writing. */
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| 185 | static off_t n_bytes_to_skip;
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| 186 | /* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all
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| 187 | input is formatted. */
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| 188 | /* The maximum number of bytes that will be formatted. */
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| 189 | static off_t max_bytes_to_format;
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| 190 | /* The offset of the first byte after the last byte to be formatted. */
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| 191 | static off_t end_offset;
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| 192 |
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| 193 | /* The number of input bytes formatted per output line. It must be
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| 194 | a multiple of the least common multiple of the sizes associated with
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| 195 | the specified output types. It should be as large as possible, but
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| 196 | no larger than 16 -- unless specified with the -w option. */
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| 197 | static size_t bytes_per_block;
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| 198 |
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| 199 | /* Human-readable representation of *file_list (for error messages).
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| 200 | It differs from *file_list only when *file_list is "-". */
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| 201 | static char const *input_filename;
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| 202 |
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| 203 | /* A NULL-terminated list of the file-arguments from the command line. */
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| 204 | static char const *const *file_list;
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| 205 |
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| 206 | /* Initializer for file_list if no file-arguments
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| 207 | were specified on the command line. */
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| 208 | static char const *const default_file_list[] = { "-", NULL };
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| 209 |
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| 210 | /* The input stream associated with the current file. */
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| 211 | static FILE *in_stream;
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| 212 |
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| 213 | #define MAX_INTEGRAL_TYPE_SIZE sizeof(ulonglong_t)
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| 214 | static unsigned char integral_type_size[MAX_INTEGRAL_TYPE_SIZE + 1] ALIGN1 = {
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| 215 | [sizeof(char)] = CHAR,
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| 216 | #if USHRT_MAX != UCHAR_MAX
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| 217 | [sizeof(short)] = SHORT,
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| 218 | #endif
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| 219 | #if UINT_MAX != USHRT_MAX
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| 220 | [sizeof(int)] = INT,
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| 221 | #endif
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| 222 | #if ULONG_MAX != UINT_MAX
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| 223 | [sizeof(long)] = LONG,
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| 224 | #endif
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| 225 | #if ULLONG_MAX != ULONG_MAX
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| 226 | [sizeof(ulonglong_t)] = LONG_LONG,
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| 227 | #endif
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| 228 | };
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| 229 |
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| 230 | #define MAX_FP_TYPE_SIZE sizeof(longdouble_t)
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| 231 | static unsigned char fp_type_size[MAX_FP_TYPE_SIZE + 1] ALIGN1 = {
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| 232 | /* gcc seems to allow repeated indexes. Last one stays */
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| 233 | [sizeof(longdouble_t)] = FLOAT_LONG_DOUBLE,
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| 234 | [sizeof(double)] = FLOAT_DOUBLE,
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| 235 | [sizeof(float)] = FLOAT_SINGLE
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| 236 | };
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| 237 |
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| 238 |
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| 239 | static unsigned
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| 240 | gcd(unsigned u, unsigned v)
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| 241 | {
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| 242 | unsigned t;
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| 243 | while (v != 0) {
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| 244 | t = u % v;
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| 245 | u = v;
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| 246 | v = t;
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| 247 | }
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| 248 | return u;
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| 249 | }
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| 250 |
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| 251 | /* Compute the least common multiple of U and V. */
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| 252 | static unsigned
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| 253 | lcm(unsigned u, unsigned v) {
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| 254 | unsigned t = gcd(u, v);
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| 255 | if (t == 0)
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| 256 | return 0;
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| 257 | return u * v / t;
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| 258 | }
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| 259 |
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| 260 | static void
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| 261 | print_s_char(size_t n_bytes, const char *block, const char *fmt_string)
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| 262 | {
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| 263 | while (n_bytes--) {
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| 264 | int tmp = *(signed char *) block;
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| 265 | printf(fmt_string, tmp);
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| 266 | block += sizeof(unsigned char);
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| 267 | }
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| 268 | }
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| 269 |
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| 270 | static void
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| 271 | print_char(size_t n_bytes, const char *block, const char *fmt_string)
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| 272 | {
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| 273 | while (n_bytes--) {
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| 274 | unsigned tmp = *(unsigned char *) block;
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| 275 | printf(fmt_string, tmp);
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| 276 | block += sizeof(unsigned char);
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| 277 | }
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| 278 | }
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| 279 |
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| 280 | static void
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| 281 | print_s_short(size_t n_bytes, const char *block, const char *fmt_string)
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| 282 | {
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| 283 | n_bytes /= sizeof(signed short);
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| 284 | while (n_bytes--) {
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| 285 | int tmp = *(signed short *) block;
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| 286 | printf(fmt_string, tmp);
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| 287 | block += sizeof(unsigned short);
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| 288 | }
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| 289 | }
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| 290 |
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| 291 | static void
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| 292 | print_short(size_t n_bytes, const char *block, const char *fmt_string)
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| 293 | {
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| 294 | n_bytes /= sizeof(unsigned short);
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| 295 | while (n_bytes--) {
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| 296 | unsigned tmp = *(unsigned short *) block;
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| 297 | printf(fmt_string, tmp);
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| 298 | block += sizeof(unsigned short);
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| 299 | }
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| 300 | }
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| 301 |
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| 302 | static void
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| 303 | print_int(size_t n_bytes, const char *block, const char *fmt_string)
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| 304 | {
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| 305 | n_bytes /= sizeof(unsigned);
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| 306 | while (n_bytes--) {
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| 307 | unsigned tmp = *(unsigned *) block;
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| 308 | printf(fmt_string, tmp);
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| 309 | block += sizeof(unsigned);
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| 310 | }
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| 311 | }
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| 312 |
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| 313 | #if UINT_MAX == ULONG_MAX
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| 314 | # define print_long print_int
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| 315 | #else
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| 316 | static void
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| 317 | print_long(size_t n_bytes, const char *block, const char *fmt_string)
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| 318 | {
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| 319 | n_bytes /= sizeof(unsigned long);
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| 320 | while (n_bytes--) {
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| 321 | unsigned long tmp = *(unsigned long *) block;
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| 322 | printf(fmt_string, tmp);
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| 323 | block += sizeof(unsigned long);
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| 324 | }
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| 325 | }
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| 326 | #endif
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| 327 |
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| 328 | #if ULONG_MAX == ULLONG_MAX
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| 329 | # define print_long_long print_long
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| 330 | #else
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| 331 | static void
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| 332 | print_long_long(size_t n_bytes, const char *block, const char *fmt_string)
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| 333 | {
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| 334 | n_bytes /= sizeof(ulonglong_t);
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| 335 | while (n_bytes--) {
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| 336 | ulonglong_t tmp = *(ulonglong_t *) block;
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| 337 | printf(fmt_string, tmp);
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| 338 | block += sizeof(ulonglong_t);
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| 339 | }
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| 340 | }
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| 341 | #endif
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| 342 |
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| 343 | static void
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| 344 | print_float(size_t n_bytes, const char *block, const char *fmt_string)
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| 345 | {
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| 346 | n_bytes /= sizeof(float);
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| 347 | while (n_bytes--) {
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| 348 | float tmp = *(float *) block;
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| 349 | printf(fmt_string, tmp);
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| 350 | block += sizeof(float);
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| 351 | }
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| 352 | }
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| 353 |
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| 354 | static void
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| 355 | print_double(size_t n_bytes, const char *block, const char *fmt_string)
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| 356 | {
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| 357 | n_bytes /= sizeof(double);
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| 358 | while (n_bytes--) {
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| 359 | double tmp = *(double *) block;
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| 360 | printf(fmt_string, tmp);
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| 361 | block += sizeof(double);
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| 362 | }
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| 363 | }
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| 364 |
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| 365 | static void
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| 366 | print_long_double(size_t n_bytes, const char *block, const char *fmt_string)
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| 367 | {
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| 368 | n_bytes /= sizeof(longdouble_t);
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| 369 | while (n_bytes--) {
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| 370 | longdouble_t tmp = *(longdouble_t *) block;
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| 371 | printf(fmt_string, tmp);
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| 372 | block += sizeof(longdouble_t);
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| 373 | }
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| 374 | }
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| 375 |
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| 376 | /* print_[named]_ascii are optimized for speed.
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| 377 | * Remember, someday you may want to pump gigabytes thru this thing.
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| 378 | * Saving a dozen of .text bytes here is counter-productive */
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| 379 |
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| 380 | static void
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| 381 | print_named_ascii(size_t n_bytes, const char *block,
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| 382 | const char *unused_fmt_string ATTRIBUTE_UNUSED)
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| 383 | {
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| 384 | /* Names for some non-printing characters. */
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| 385 | static const char charname[33][3] ALIGN1 = {
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| 386 | "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
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| 387 | " bs", " ht", " nl", " vt", " ff", " cr", " so", " si",
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| 388 | "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
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| 389 | "can", " em", "sub", "esc", " fs", " gs", " rs", " us",
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| 390 | " sp"
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| 391 | };
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| 392 | // buf[N] pos: 01234 56789
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| 393 | char buf[12] = " x\0 0xx\0";
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| 394 | // actually " x\0 xxx\0", but I want to share the string with below.
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| 395 | // [12] because we take three 32bit stack slots anyway, and
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| 396 | // gcc is too dumb to initialize with constant stores,
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| 397 | // it copies initializer from rodata. Oh well.
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| 398 |
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| 399 | while (n_bytes--) {
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| 400 | unsigned masked_c = *(unsigned char *) block++;
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| 401 |
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| 402 | masked_c &= 0x7f;
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| 403 | if (masked_c == 0x7f) {
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| 404 | fputs(" del", stdout);
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| 405 | continue;
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| 406 | }
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| 407 | if (masked_c > ' ') {
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| 408 | buf[3] = masked_c;
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| 409 | fputs(buf, stdout);
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| 410 | continue;
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| 411 | }
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| 412 | /* Why? Because printf(" %3.3s") is much slower... */
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| 413 | buf[6] = charname[masked_c][0];
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| 414 | buf[7] = charname[masked_c][1];
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| 415 | buf[8] = charname[masked_c][2];
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| 416 | fputs(buf+5, stdout);
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| 417 | }
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| 418 | }
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| 419 |
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| 420 | static void
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| 421 | print_ascii(size_t n_bytes, const char *block,
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| 422 | const char *unused_fmt_string ATTRIBUTE_UNUSED)
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| 423 | {
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| 424 | // buf[N] pos: 01234 56789
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| 425 | char buf[12] = " x\0 0xx\0";
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| 426 |
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| 427 | while (n_bytes--) {
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| 428 | const char *s;
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| 429 | unsigned c = *(unsigned char *) block++;
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| 430 |
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| 431 | if (ISPRINT(c)) {
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| 432 | buf[3] = c;
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| 433 | fputs(buf, stdout);
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| 434 | continue;
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| 435 | }
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| 436 | switch (c) {
|
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| 437 | case '\0':
|
---|
| 438 | s = " \\0";
|
---|
| 439 | break;
|
---|
| 440 | case '\007':
|
---|
| 441 | s = " \\a";
|
---|
| 442 | break;
|
---|
| 443 | case '\b':
|
---|
| 444 | s = " \\b";
|
---|
| 445 | break;
|
---|
| 446 | case '\f':
|
---|
| 447 | s = " \\f";
|
---|
| 448 | break;
|
---|
| 449 | case '\n':
|
---|
| 450 | s = " \\n";
|
---|
| 451 | break;
|
---|
| 452 | case '\r':
|
---|
| 453 | s = " \\r";
|
---|
| 454 | break;
|
---|
| 455 | case '\t':
|
---|
| 456 | s = " \\t";
|
---|
| 457 | break;
|
---|
| 458 | case '\v':
|
---|
| 459 | s = " \\v";
|
---|
| 460 | break;
|
---|
| 461 | case '\x7f':
|
---|
| 462 | s = " 177";
|
---|
| 463 | break;
|
---|
| 464 | default: /* c is never larger than 040 */
|
---|
| 465 | buf[7] = (c >> 3) + '0';
|
---|
| 466 | buf[8] = (c & 7) + '0';
|
---|
| 467 | s = buf + 5;
|
---|
| 468 | }
|
---|
| 469 | fputs(s, stdout);
|
---|
| 470 | }
|
---|
| 471 | }
|
---|
| 472 |
|
---|
| 473 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 474 | file pointer IN_STREAM and the global string INPUT_FILENAME to the
|
---|
| 475 | first one that can be successfully opened. Modify FILE_LIST to
|
---|
| 476 | reference the next filename in the list. A file name of "-" is
|
---|
| 477 | interpreted as standard input. If any file open fails, give an error
|
---|
| 478 | message and return nonzero. */
|
---|
| 479 |
|
---|
| 480 | static void
|
---|
| 481 | open_next_file(void)
|
---|
| 482 | {
|
---|
| 483 | while (1) {
|
---|
| 484 | input_filename = *file_list;
|
---|
| 485 | if (!input_filename)
|
---|
| 486 | return;
|
---|
| 487 | file_list++;
|
---|
| 488 | in_stream = fopen_or_warn_stdin(input_filename);
|
---|
| 489 | if (in_stream) {
|
---|
| 490 | if (in_stream == stdin)
|
---|
| 491 | input_filename = bb_msg_standard_input;
|
---|
| 492 | break;
|
---|
| 493 | }
|
---|
| 494 | ioerror = 1;
|
---|
| 495 | }
|
---|
| 496 |
|
---|
| 497 | if (limit_bytes_to_format && !flag_dump_strings)
|
---|
| 498 | setbuf(in_stream, NULL);
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | /* Test whether there have been errors on in_stream, and close it if
|
---|
| 502 | it is not standard input. Return nonzero if there has been an error
|
---|
| 503 | on in_stream or stdout; return zero otherwise. This function will
|
---|
| 504 | report more than one error only if both a read and a write error
|
---|
| 505 | have occurred. IN_ERRNO, if nonzero, is the error number
|
---|
| 506 | corresponding to the most recent action for IN_STREAM. */
|
---|
| 507 |
|
---|
| 508 | static void
|
---|
| 509 | check_and_close(void)
|
---|
| 510 | {
|
---|
| 511 | if (in_stream) {
|
---|
| 512 | if (ferror(in_stream)) {
|
---|
| 513 | bb_error_msg("%s: read error", input_filename);
|
---|
| 514 | ioerror = 1;
|
---|
| 515 | }
|
---|
| 516 | fclose_if_not_stdin(in_stream);
|
---|
| 517 | in_stream = NULL;
|
---|
| 518 | }
|
---|
| 519 |
|
---|
| 520 | if (ferror(stdout)) {
|
---|
| 521 | bb_error_msg("write error");
|
---|
| 522 | ioerror = 1;
|
---|
| 523 | }
|
---|
| 524 | }
|
---|
| 525 |
|
---|
| 526 | /* If S points to a single valid modern od format string, put
|
---|
| 527 | a description of that format in *TSPEC, make *NEXT point at the
|
---|
| 528 | character following the just-decoded format (if *NEXT is non-NULL),
|
---|
| 529 | and return zero. For example, if S were "d4afL"
|
---|
| 530 | *NEXT would be set to "afL" and *TSPEC would be
|
---|
| 531 | {
|
---|
| 532 | fmt = SIGNED_DECIMAL;
|
---|
| 533 | size = INT or LONG; (whichever integral_type_size[4] resolves to)
|
---|
| 534 | print_function = print_int; (assuming size == INT)
|
---|
| 535 | fmt_string = "%011d%c";
|
---|
| 536 | }
|
---|
| 537 | S_ORIG is solely for reporting errors. It should be the full format
|
---|
| 538 | string argument. */
|
---|
| 539 |
|
---|
| 540 | static void
|
---|
| 541 | decode_one_format(const char *s_orig, const char *s, const char **next,
|
---|
| 542 | struct tspec *tspec)
|
---|
| 543 | {
|
---|
| 544 | enum size_spec size_spec;
|
---|
| 545 | unsigned size;
|
---|
| 546 | enum output_format fmt;
|
---|
| 547 | const char *p;
|
---|
| 548 | char *end;
|
---|
| 549 | char *fmt_string = NULL;
|
---|
| 550 | void (*print_function) (size_t, const char *, const char *);
|
---|
| 551 | unsigned c;
|
---|
| 552 | unsigned field_width = 0;
|
---|
| 553 | int pos;
|
---|
| 554 |
|
---|
| 555 | assert(tspec != NULL);
|
---|
| 556 |
|
---|
| 557 | switch (*s) {
|
---|
| 558 | case 'd':
|
---|
| 559 | case 'o':
|
---|
| 560 | case 'u':
|
---|
| 561 | case 'x': {
|
---|
| 562 | static const char CSIL[] ALIGN1 = "CSIL";
|
---|
| 563 |
|
---|
| 564 | c = *s++;
|
---|
| 565 | p = strchr(CSIL, *s);
|
---|
| 566 | if (!p) {
|
---|
| 567 | size = sizeof(int);
|
---|
| 568 | if (isdigit(s[0])) {
|
---|
| 569 | size = bb_strtou(s, &end, 0);
|
---|
| 570 | if (errno == ERANGE
|
---|
| 571 | || MAX_INTEGRAL_TYPE_SIZE < size
|
---|
| 572 | || integral_type_size[size] == NO_SIZE
|
---|
| 573 | ) {
|
---|
| 574 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 575 | "%u-byte %s type is not supported",
|
---|
| 576 | s_orig, size, "integral");
|
---|
| 577 | }
|
---|
| 578 | s = end;
|
---|
| 579 | }
|
---|
| 580 | } else {
|
---|
| 581 | static const uint8_t CSIL_sizeof[] = {
|
---|
| 582 | sizeof(char),
|
---|
| 583 | sizeof(short),
|
---|
| 584 | sizeof(int),
|
---|
| 585 | sizeof(long),
|
---|
| 586 | };
|
---|
| 587 | size = CSIL_sizeof[p - CSIL];
|
---|
| 588 | }
|
---|
| 589 |
|
---|
| 590 | #define ISPEC_TO_FORMAT(Spec, Min_format, Long_format, Max_format) \
|
---|
| 591 | ((Spec) == LONG_LONG ? (Max_format) \
|
---|
| 592 | : ((Spec) == LONG ? (Long_format) : (Min_format)))
|
---|
| 593 |
|
---|
| 594 | #define FMT_BYTES_ALLOCATED 9
|
---|
| 595 | size_spec = integral_type_size[size];
|
---|
| 596 |
|
---|
| 597 | {
|
---|
| 598 | static const char doux[] ALIGN1 = "doux";
|
---|
| 599 | static const char doux_fmt_letter[][4] = {
|
---|
| 600 | "lld", "llo", "llu", "llx"
|
---|
| 601 | };
|
---|
| 602 | static const enum output_format doux_fmt[] = {
|
---|
| 603 | SIGNED_DECIMAL,
|
---|
| 604 | OCTAL,
|
---|
| 605 | UNSIGNED_DECIMAL,
|
---|
| 606 | HEXADECIMAL,
|
---|
| 607 | };
|
---|
| 608 | static const uint8_t *const doux_bytes_to_XXX[] = {
|
---|
| 609 | bytes_to_signed_dec_digits,
|
---|
| 610 | bytes_to_oct_digits,
|
---|
| 611 | bytes_to_unsigned_dec_digits,
|
---|
| 612 | bytes_to_hex_digits,
|
---|
| 613 | };
|
---|
| 614 | static const char doux_fmtstring[][sizeof(" %%0%u%s")] = {
|
---|
| 615 | " %%%u%s",
|
---|
| 616 | " %%0%u%s",
|
---|
| 617 | " %%%u%s",
|
---|
| 618 | " %%0%u%s",
|
---|
| 619 | };
|
---|
| 620 |
|
---|
| 621 | pos = strchr(doux, c) - doux;
|
---|
| 622 | fmt = doux_fmt[pos];
|
---|
| 623 | field_width = doux_bytes_to_XXX[pos][size];
|
---|
| 624 | p = doux_fmt_letter[pos] + 2;
|
---|
| 625 | if (size_spec == LONG) p--;
|
---|
| 626 | if (size_spec == LONG_LONG) p -= 2;
|
---|
| 627 | fmt_string = xasprintf(doux_fmtstring[pos], field_width, p);
|
---|
| 628 | }
|
---|
| 629 |
|
---|
| 630 | switch (size_spec) {
|
---|
| 631 | case CHAR:
|
---|
| 632 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 633 | ? print_s_char
|
---|
| 634 | : print_char);
|
---|
| 635 | break;
|
---|
| 636 | case SHORT:
|
---|
| 637 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 638 | ? print_s_short
|
---|
| 639 | : print_short);
|
---|
| 640 | break;
|
---|
| 641 | case INT:
|
---|
| 642 | print_function = print_int;
|
---|
| 643 | break;
|
---|
| 644 | case LONG:
|
---|
| 645 | print_function = print_long;
|
---|
| 646 | break;
|
---|
| 647 | default: /* case LONG_LONG: */
|
---|
| 648 | print_function = print_long_long;
|
---|
| 649 | break;
|
---|
| 650 | }
|
---|
| 651 | break;
|
---|
| 652 | }
|
---|
| 653 |
|
---|
| 654 | case 'f': {
|
---|
| 655 | static const char FDL[] ALIGN1 = "FDL";
|
---|
| 656 |
|
---|
| 657 | fmt = FLOATING_POINT;
|
---|
| 658 | ++s;
|
---|
| 659 | p = strchr(FDL, *s);
|
---|
| 660 | if (!p) {
|
---|
| 661 | size = sizeof(double);
|
---|
| 662 | if (isdigit(s[0])) {
|
---|
| 663 | size = bb_strtou(s, &end, 0);
|
---|
| 664 | if (errno == ERANGE || size > MAX_FP_TYPE_SIZE
|
---|
| 665 | || fp_type_size[size] == NO_SIZE
|
---|
| 666 | ) {
|
---|
| 667 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 668 | "%u-byte %s type is not supported",
|
---|
| 669 | s_orig, size, "floating point");
|
---|
| 670 | }
|
---|
| 671 | s = end;
|
---|
| 672 | }
|
---|
| 673 | } else {
|
---|
| 674 | static const uint8_t FDL_sizeof[] = {
|
---|
| 675 | sizeof(float),
|
---|
| 676 | sizeof(double),
|
---|
| 677 | sizeof(longdouble_t),
|
---|
| 678 | };
|
---|
| 679 |
|
---|
| 680 | size = FDL_sizeof[p - FDL];
|
---|
| 681 | }
|
---|
| 682 |
|
---|
| 683 | size_spec = fp_type_size[size];
|
---|
| 684 |
|
---|
| 685 | switch (size_spec) {
|
---|
| 686 | case FLOAT_SINGLE:
|
---|
| 687 | print_function = print_float;
|
---|
| 688 | field_width = FLT_DIG + 8;
|
---|
| 689 | /* Don't use %#e; not all systems support it. */
|
---|
| 690 | fmt_string = xasprintf(" %%%d.%de", field_width, FLT_DIG);
|
---|
| 691 | break;
|
---|
| 692 | case FLOAT_DOUBLE:
|
---|
| 693 | print_function = print_double;
|
---|
| 694 | field_width = DBL_DIG + 8;
|
---|
| 695 | fmt_string = xasprintf(" %%%d.%de", field_width, DBL_DIG);
|
---|
| 696 | break;
|
---|
| 697 | default: /* case FLOAT_LONG_DOUBLE: */
|
---|
| 698 | print_function = print_long_double;
|
---|
| 699 | field_width = LDBL_DIG + 8;
|
---|
| 700 | fmt_string = xasprintf(" %%%d.%dLe", field_width, LDBL_DIG);
|
---|
| 701 | break;
|
---|
| 702 | }
|
---|
| 703 | break;
|
---|
| 704 | }
|
---|
| 705 |
|
---|
| 706 | case 'a':
|
---|
| 707 | ++s;
|
---|
| 708 | fmt = NAMED_CHARACTER;
|
---|
| 709 | size_spec = CHAR;
|
---|
| 710 | print_function = print_named_ascii;
|
---|
| 711 | field_width = 3;
|
---|
| 712 | break;
|
---|
| 713 | case 'c':
|
---|
| 714 | ++s;
|
---|
| 715 | fmt = CHARACTER;
|
---|
| 716 | size_spec = CHAR;
|
---|
| 717 | print_function = print_ascii;
|
---|
| 718 | field_width = 3;
|
---|
| 719 | break;
|
---|
| 720 | default:
|
---|
| 721 | bb_error_msg_and_die("invalid character '%c' "
|
---|
| 722 | "in type string '%s'", *s, s_orig);
|
---|
| 723 | }
|
---|
| 724 |
|
---|
| 725 | tspec->size = size_spec;
|
---|
| 726 | tspec->fmt = fmt;
|
---|
| 727 | tspec->print_function = print_function;
|
---|
| 728 | tspec->fmt_string = fmt_string;
|
---|
| 729 |
|
---|
| 730 | tspec->field_width = field_width;
|
---|
| 731 | tspec->hexl_mode_trailer = (*s == 'z');
|
---|
| 732 | if (tspec->hexl_mode_trailer)
|
---|
| 733 | s++;
|
---|
| 734 |
|
---|
| 735 | if (next != NULL)
|
---|
| 736 | *next = s;
|
---|
| 737 | }
|
---|
| 738 |
|
---|
| 739 | /* Decode the modern od format string S. Append the decoded
|
---|
| 740 | representation to the global array SPEC, reallocating SPEC if
|
---|
| 741 | necessary. Return zero if S is valid, nonzero otherwise. */
|
---|
| 742 |
|
---|
| 743 | static void
|
---|
| 744 | decode_format_string(const char *s)
|
---|
| 745 | {
|
---|
| 746 | const char *s_orig = s;
|
---|
| 747 |
|
---|
| 748 | while (*s != '\0') {
|
---|
| 749 | struct tspec tspec;
|
---|
| 750 | const char *next;
|
---|
| 751 |
|
---|
| 752 | decode_one_format(s_orig, s, &next, &tspec);
|
---|
| 753 |
|
---|
| 754 | assert(s != next);
|
---|
| 755 | s = next;
|
---|
| 756 | n_specs++;
|
---|
| 757 | spec = xrealloc(spec, n_specs * sizeof(*spec));
|
---|
| 758 | memcpy(&spec[n_specs-1], &tspec, sizeof *spec);
|
---|
| 759 | }
|
---|
| 760 | }
|
---|
| 761 |
|
---|
| 762 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 763 | file pointer IN_STREAM to position N_SKIP in the concatenation of
|
---|
| 764 | those files. If any file operation fails or if there are fewer than
|
---|
| 765 | N_SKIP bytes in the combined input, give an error message and return
|
---|
| 766 | nonzero. When possible, use seek rather than read operations to
|
---|
| 767 | advance IN_STREAM. */
|
---|
| 768 |
|
---|
| 769 | static void
|
---|
| 770 | skip(off_t n_skip)
|
---|
| 771 | {
|
---|
| 772 | if (n_skip == 0)
|
---|
| 773 | return;
|
---|
| 774 |
|
---|
| 775 | while (in_stream) { /* !EOF */
|
---|
| 776 | struct stat file_stats;
|
---|
| 777 |
|
---|
| 778 | /* First try seeking. For large offsets, this extra work is
|
---|
| 779 | worthwhile. If the offset is below some threshold it may be
|
---|
| 780 | more efficient to move the pointer by reading. There are two
|
---|
| 781 | issues when trying to seek:
|
---|
| 782 | - the file must be seekable.
|
---|
| 783 | - before seeking to the specified position, make sure
|
---|
| 784 | that the new position is in the current file.
|
---|
| 785 | Try to do that by getting file's size using fstat.
|
---|
| 786 | But that will work only for regular files. */
|
---|
| 787 |
|
---|
| 788 | /* The st_size field is valid only for regular files
|
---|
| 789 | (and for symbolic links, which cannot occur here).
|
---|
| 790 | If the number of bytes left to skip is at least
|
---|
| 791 | as large as the size of the current file, we can
|
---|
| 792 | decrement n_skip and go on to the next file. */
|
---|
| 793 | if (fstat(fileno(in_stream), &file_stats) == 0
|
---|
| 794 | && S_ISREG(file_stats.st_mode) && file_stats.st_size >= 0
|
---|
| 795 | ) {
|
---|
| 796 | if (file_stats.st_size < n_skip) {
|
---|
| 797 | n_skip -= file_stats.st_size;
|
---|
| 798 | /* take check&close / open_next route */
|
---|
| 799 | } else {
|
---|
| 800 | if (fseeko(in_stream, n_skip, SEEK_CUR) != 0)
|
---|
| 801 | ioerror = 1;
|
---|
| 802 | return;
|
---|
| 803 | }
|
---|
| 804 | } else {
|
---|
| 805 | /* If it's not a regular file with nonnegative size,
|
---|
| 806 | position the file pointer by reading. */
|
---|
| 807 | char buf[BUFSIZ];
|
---|
| 808 | size_t n_bytes_read, n_bytes_to_read = BUFSIZ;
|
---|
| 809 |
|
---|
| 810 | while (n_skip > 0) {
|
---|
| 811 | if (n_skip < n_bytes_to_read)
|
---|
| 812 | n_bytes_to_read = n_skip;
|
---|
| 813 | n_bytes_read = fread(buf, 1, n_bytes_to_read, in_stream);
|
---|
| 814 | n_skip -= n_bytes_read;
|
---|
| 815 | if (n_bytes_read != n_bytes_to_read)
|
---|
| 816 | break; /* EOF on this file or error */
|
---|
| 817 | }
|
---|
| 818 | }
|
---|
| 819 | if (n_skip == 0)
|
---|
| 820 | return;
|
---|
| 821 |
|
---|
| 822 | check_and_close();
|
---|
| 823 | open_next_file();
|
---|
| 824 | }
|
---|
| 825 |
|
---|
| 826 | if (n_skip)
|
---|
| 827 | bb_error_msg_and_die("cannot skip past end of combined input");
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 |
|
---|
| 831 | typedef void FN_format_address(off_t address, char c);
|
---|
| 832 |
|
---|
| 833 | static void
|
---|
| 834 | format_address_none(off_t address ATTRIBUTE_UNUSED, char c ATTRIBUTE_UNUSED)
|
---|
| 835 | {
|
---|
| 836 | }
|
---|
| 837 |
|
---|
| 838 | static char address_fmt[] ALIGN1 = "%0n"OFF_FMT"xc";
|
---|
| 839 | /* Corresponds to 'x' above */
|
---|
| 840 | #define address_base_char address_fmt[sizeof(address_fmt)-3]
|
---|
| 841 | /* Corresponds to 'n' above */
|
---|
| 842 | #define address_pad_len_char address_fmt[2]
|
---|
| 843 |
|
---|
| 844 | static void
|
---|
| 845 | format_address_std(off_t address, char c)
|
---|
| 846 | {
|
---|
| 847 | /* Corresponds to 'c' */
|
---|
| 848 | address_fmt[sizeof(address_fmt)-2] = c;
|
---|
| 849 | printf(address_fmt, address);
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 | #if ENABLE_GETOPT_LONG
|
---|
| 853 | /* only used with --traditional */
|
---|
| 854 | static void
|
---|
| 855 | format_address_paren(off_t address, char c)
|
---|
| 856 | {
|
---|
| 857 | putchar('(');
|
---|
| 858 | format_address_std(address, ')');
|
---|
| 859 | if (c) putchar(c);
|
---|
| 860 | }
|
---|
| 861 |
|
---|
| 862 | static void
|
---|
| 863 | format_address_label(off_t address, char c)
|
---|
| 864 | {
|
---|
| 865 | format_address_std(address, ' ');
|
---|
| 866 | format_address_paren(address + pseudo_offset, c);
|
---|
| 867 | }
|
---|
| 868 | #endif
|
---|
| 869 |
|
---|
| 870 | static void
|
---|
| 871 | dump_hexl_mode_trailer(size_t n_bytes, const char *block)
|
---|
| 872 | {
|
---|
| 873 | fputs(" >", stdout);
|
---|
| 874 | while (n_bytes--) {
|
---|
| 875 | unsigned c = *(unsigned char *) block++;
|
---|
| 876 | c = (ISPRINT(c) ? c : '.');
|
---|
| 877 | putchar(c);
|
---|
| 878 | }
|
---|
| 879 | putchar('<');
|
---|
| 880 | }
|
---|
| 881 |
|
---|
| 882 | /* Write N_BYTES bytes from CURR_BLOCK to standard output once for each
|
---|
| 883 | of the N_SPEC format specs. CURRENT_OFFSET is the byte address of
|
---|
| 884 | CURR_BLOCK in the concatenation of input files, and it is printed
|
---|
| 885 | (optionally) only before the output line associated with the first
|
---|
| 886 | format spec. When duplicate blocks are being abbreviated, the output
|
---|
| 887 | for a sequence of identical input blocks is the output for the first
|
---|
| 888 | block followed by an asterisk alone on a line. It is valid to compare
|
---|
| 889 | the blocks PREV_BLOCK and CURR_BLOCK only when N_BYTES == BYTES_PER_BLOCK.
|
---|
| 890 | That condition may be false only for the last input block -- and then
|
---|
| 891 | only when it has not been padded to length BYTES_PER_BLOCK. */
|
---|
| 892 |
|
---|
| 893 | static void
|
---|
| 894 | write_block(off_t current_offset, size_t n_bytes,
|
---|
| 895 | const char *prev_block, const char *curr_block)
|
---|
| 896 | {
|
---|
| 897 | static char first = 1;
|
---|
| 898 | static char prev_pair_equal = 0;
|
---|
| 899 | size_t i;
|
---|
| 900 |
|
---|
| 901 | if (!verbose && !first
|
---|
| 902 | && n_bytes == bytes_per_block
|
---|
| 903 | && memcmp(prev_block, curr_block, bytes_per_block) == 0
|
---|
| 904 | ) {
|
---|
| 905 | if (prev_pair_equal) {
|
---|
| 906 | /* The two preceding blocks were equal, and the current
|
---|
| 907 | block is the same as the last one, so print nothing. */
|
---|
| 908 | } else {
|
---|
| 909 | puts("*");
|
---|
| 910 | prev_pair_equal = 1;
|
---|
| 911 | }
|
---|
| 912 | } else {
|
---|
| 913 | first = 0;
|
---|
| 914 | prev_pair_equal = 0;
|
---|
| 915 | for (i = 0; i < n_specs; i++) {
|
---|
| 916 | if (i == 0)
|
---|
| 917 | format_address(current_offset, '\0');
|
---|
| 918 | else
|
---|
| 919 | printf("%*s", address_pad_len_char - '0', "");
|
---|
| 920 | (*spec[i].print_function) (n_bytes, curr_block, spec[i].fmt_string);
|
---|
| 921 | if (spec[i].hexl_mode_trailer) {
|
---|
| 922 | /* space-pad out to full line width, then dump the trailer */
|
---|
| 923 | int datum_width = width_bytes[spec[i].size];
|
---|
| 924 | int blank_fields = (bytes_per_block - n_bytes) / datum_width;
|
---|
| 925 | int field_width = spec[i].field_width + 1;
|
---|
| 926 | printf("%*s", blank_fields * field_width, "");
|
---|
| 927 | dump_hexl_mode_trailer(n_bytes, curr_block);
|
---|
| 928 | }
|
---|
| 929 | putchar('\n');
|
---|
| 930 | }
|
---|
| 931 | }
|
---|
| 932 | }
|
---|
| 933 |
|
---|
| 934 | static void
|
---|
| 935 | read_block(size_t n, char *block, size_t *n_bytes_in_buffer)
|
---|
| 936 | {
|
---|
| 937 | assert(0 < n && n <= bytes_per_block);
|
---|
| 938 |
|
---|
| 939 | *n_bytes_in_buffer = 0;
|
---|
| 940 |
|
---|
| 941 | if (n == 0)
|
---|
| 942 | return;
|
---|
| 943 |
|
---|
| 944 | while (in_stream != NULL) { /* EOF. */
|
---|
| 945 | size_t n_needed;
|
---|
| 946 | size_t n_read;
|
---|
| 947 |
|
---|
| 948 | n_needed = n - *n_bytes_in_buffer;
|
---|
| 949 | n_read = fread(block + *n_bytes_in_buffer, 1, n_needed, in_stream);
|
---|
| 950 | *n_bytes_in_buffer += n_read;
|
---|
| 951 | if (n_read == n_needed)
|
---|
| 952 | break;
|
---|
| 953 | /* error check is done in check_and_close */
|
---|
| 954 | check_and_close();
|
---|
| 955 | open_next_file();
|
---|
| 956 | }
|
---|
| 957 | }
|
---|
| 958 |
|
---|
| 959 | /* Return the least common multiple of the sizes associated
|
---|
| 960 | with the format specs. */
|
---|
| 961 |
|
---|
| 962 | static int
|
---|
| 963 | get_lcm(void)
|
---|
| 964 | {
|
---|
| 965 | size_t i;
|
---|
| 966 | int l_c_m = 1;
|
---|
| 967 |
|
---|
| 968 | for (i = 0; i < n_specs; i++)
|
---|
| 969 | l_c_m = lcm(l_c_m, width_bytes[(int) spec[i].size]);
|
---|
| 970 | return l_c_m;
|
---|
| 971 | }
|
---|
| 972 |
|
---|
| 973 | #if ENABLE_GETOPT_LONG
|
---|
| 974 | /* If S is a valid traditional offset specification with an optional
|
---|
| 975 | leading '+' return nonzero and set *OFFSET to the offset it denotes. */
|
---|
| 976 |
|
---|
| 977 | static int
|
---|
| 978 | parse_old_offset(const char *s, off_t *offset)
|
---|
| 979 | {
|
---|
| 980 | static const struct suffix_mult Bb[] = {
|
---|
| 981 | { "B", 1024 },
|
---|
| 982 | { "b", 512 },
|
---|
| 983 | { }
|
---|
| 984 | };
|
---|
| 985 | char *p;
|
---|
| 986 | int radix;
|
---|
| 987 |
|
---|
| 988 | /* Skip over any leading '+'. */
|
---|
| 989 | if (s[0] == '+') ++s;
|
---|
| 990 |
|
---|
| 991 | /* Determine the radix we'll use to interpret S. If there is a '.',
|
---|
| 992 | * it's decimal, otherwise, if the string begins with '0X'or '0x',
|
---|
| 993 | * it's hexadecimal, else octal. */
|
---|
| 994 | p = strchr(s, '.');
|
---|
| 995 | radix = 8;
|
---|
| 996 | if (p) {
|
---|
| 997 | p[0] = '\0'; /* cheating */
|
---|
| 998 | radix = 10;
|
---|
| 999 | } else if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
|
---|
| 1000 | radix = 16;
|
---|
| 1001 |
|
---|
| 1002 | *offset = xstrtooff_sfx(s, radix, Bb);
|
---|
| 1003 | if (p) p[0] = '.';
|
---|
| 1004 |
|
---|
| 1005 | return (*offset >= 0);
|
---|
| 1006 | }
|
---|
| 1007 | #endif
|
---|
| 1008 |
|
---|
| 1009 | /* Read a chunk of size BYTES_PER_BLOCK from the input files, write the
|
---|
| 1010 | formatted block to standard output, and repeat until the specified
|
---|
| 1011 | maximum number of bytes has been read or until all input has been
|
---|
| 1012 | processed. If the last block read is smaller than BYTES_PER_BLOCK
|
---|
| 1013 | and its size is not a multiple of the size associated with a format
|
---|
| 1014 | spec, extend the input block with zero bytes until its length is a
|
---|
| 1015 | multiple of all format spec sizes. Write the final block. Finally,
|
---|
| 1016 | write on a line by itself the offset of the byte after the last byte
|
---|
| 1017 | read. Accumulate return values from calls to read_block and
|
---|
| 1018 | check_and_close, and if any was nonzero, return nonzero.
|
---|
| 1019 | Otherwise, return zero. */
|
---|
| 1020 |
|
---|
| 1021 | static void
|
---|
| 1022 | dump(void)
|
---|
| 1023 | {
|
---|
| 1024 | char *block[2];
|
---|
| 1025 | off_t current_offset;
|
---|
| 1026 | int idx;
|
---|
| 1027 | size_t n_bytes_read;
|
---|
| 1028 |
|
---|
| 1029 | block[0] = xmalloc(2*bytes_per_block);
|
---|
| 1030 | block[1] = block[0] + bytes_per_block;
|
---|
| 1031 |
|
---|
| 1032 | current_offset = n_bytes_to_skip;
|
---|
| 1033 |
|
---|
| 1034 | idx = 0;
|
---|
| 1035 | if (limit_bytes_to_format) {
|
---|
| 1036 | while (1) {
|
---|
| 1037 | size_t n_needed;
|
---|
| 1038 | if (current_offset >= end_offset) {
|
---|
| 1039 | n_bytes_read = 0;
|
---|
| 1040 | break;
|
---|
| 1041 | }
|
---|
| 1042 | n_needed = MIN(end_offset - current_offset,
|
---|
| 1043 | (off_t) bytes_per_block);
|
---|
| 1044 | read_block(n_needed, block[idx], &n_bytes_read);
|
---|
| 1045 | if (n_bytes_read < bytes_per_block)
|
---|
| 1046 | break;
|
---|
| 1047 | assert(n_bytes_read == bytes_per_block);
|
---|
| 1048 | write_block(current_offset, n_bytes_read,
|
---|
| 1049 | block[!idx], block[idx]);
|
---|
| 1050 | current_offset += n_bytes_read;
|
---|
| 1051 | idx = !idx;
|
---|
| 1052 | }
|
---|
| 1053 | } else {
|
---|
| 1054 | while (1) {
|
---|
| 1055 | read_block(bytes_per_block, block[idx], &n_bytes_read);
|
---|
| 1056 | if (n_bytes_read < bytes_per_block)
|
---|
| 1057 | break;
|
---|
| 1058 | assert(n_bytes_read == bytes_per_block);
|
---|
| 1059 | write_block(current_offset, n_bytes_read,
|
---|
| 1060 | block[!idx], block[idx]);
|
---|
| 1061 | current_offset += n_bytes_read;
|
---|
| 1062 | idx = !idx;
|
---|
| 1063 | }
|
---|
| 1064 | }
|
---|
| 1065 |
|
---|
| 1066 | if (n_bytes_read > 0) {
|
---|
| 1067 | int l_c_m;
|
---|
| 1068 | size_t bytes_to_write;
|
---|
| 1069 |
|
---|
| 1070 | l_c_m = get_lcm();
|
---|
| 1071 |
|
---|
| 1072 | /* Make bytes_to_write the smallest multiple of l_c_m that
|
---|
| 1073 | is at least as large as n_bytes_read. */
|
---|
| 1074 | bytes_to_write = l_c_m * ((n_bytes_read + l_c_m - 1) / l_c_m);
|
---|
| 1075 |
|
---|
| 1076 | memset(block[idx] + n_bytes_read, 0, bytes_to_write - n_bytes_read);
|
---|
| 1077 | write_block(current_offset, bytes_to_write,
|
---|
| 1078 | block[!idx], block[idx]);
|
---|
| 1079 | current_offset += n_bytes_read;
|
---|
| 1080 | }
|
---|
| 1081 |
|
---|
| 1082 | format_address(current_offset, '\n');
|
---|
| 1083 |
|
---|
| 1084 | if (limit_bytes_to_format && current_offset >= end_offset)
|
---|
| 1085 | check_and_close();
|
---|
| 1086 |
|
---|
| 1087 | free(block[0]);
|
---|
| 1088 | }
|
---|
| 1089 |
|
---|
| 1090 | /* Read a single byte into *C from the concatenation of the input files
|
---|
| 1091 | named in the global array FILE_LIST. On the first call to this
|
---|
| 1092 | function, the global variable IN_STREAM is expected to be an open
|
---|
| 1093 | stream associated with the input file INPUT_FILENAME. If IN_STREAM
|
---|
| 1094 | is at end-of-file, close it and update the global variables IN_STREAM
|
---|
| 1095 | and INPUT_FILENAME so they correspond to the next file in the list.
|
---|
| 1096 | Then try to read a byte from the newly opened file. Repeat if
|
---|
| 1097 | necessary until EOF is reached for the last file in FILE_LIST, then
|
---|
| 1098 | set *C to EOF and return. Subsequent calls do likewise. The return
|
---|
| 1099 | value is nonzero if any errors occured, zero otherwise. */
|
---|
| 1100 |
|
---|
| 1101 | static void
|
---|
| 1102 | read_char(int *c)
|
---|
| 1103 | {
|
---|
| 1104 | while (in_stream) { /* !EOF */
|
---|
| 1105 | *c = fgetc(in_stream);
|
---|
| 1106 | if (*c != EOF)
|
---|
| 1107 | return;
|
---|
| 1108 | check_and_close();
|
---|
| 1109 | open_next_file();
|
---|
| 1110 | }
|
---|
| 1111 | *c = EOF;
|
---|
| 1112 | }
|
---|
| 1113 |
|
---|
| 1114 | /* Read N bytes into BLOCK from the concatenation of the input files
|
---|
| 1115 | named in the global array FILE_LIST. On the first call to this
|
---|
| 1116 | function, the global variable IN_STREAM is expected to be an open
|
---|
| 1117 | stream associated with the input file INPUT_FILENAME. If all N
|
---|
| 1118 | bytes cannot be read from IN_STREAM, close IN_STREAM and update
|
---|
| 1119 | the global variables IN_STREAM and INPUT_FILENAME. Then try to
|
---|
| 1120 | read the remaining bytes from the newly opened file. Repeat if
|
---|
| 1121 | necessary until EOF is reached for the last file in FILE_LIST.
|
---|
| 1122 | On subsequent calls, don't modify BLOCK and return zero. Set
|
---|
| 1123 | *N_BYTES_IN_BUFFER to the number of bytes read. If an error occurs,
|
---|
| 1124 | it will be detected through ferror when the stream is about to be
|
---|
| 1125 | closed. If there is an error, give a message but continue reading
|
---|
| 1126 | as usual and return nonzero. Otherwise return zero. */
|
---|
| 1127 |
|
---|
| 1128 | /* STRINGS mode. Find each "string constant" in the input.
|
---|
| 1129 | A string constant is a run of at least 'string_min' ASCII
|
---|
| 1130 | graphic (or formatting) characters terminated by a null.
|
---|
| 1131 | Based on a function written by Richard Stallman for a
|
---|
| 1132 | traditional version of od. Return nonzero if an error
|
---|
| 1133 | occurs. Otherwise, return zero. */
|
---|
| 1134 |
|
---|
| 1135 | static void
|
---|
| 1136 | dump_strings(void)
|
---|
| 1137 | {
|
---|
| 1138 | size_t bufsize = MAX(100, string_min);
|
---|
| 1139 | char *buf = xmalloc(bufsize);
|
---|
| 1140 | off_t address = n_bytes_to_skip;
|
---|
| 1141 |
|
---|
| 1142 | while (1) {
|
---|
| 1143 | size_t i;
|
---|
| 1144 | int c;
|
---|
| 1145 |
|
---|
| 1146 | /* See if the next 'string_min' chars are all printing chars. */
|
---|
| 1147 | tryline:
|
---|
| 1148 | if (limit_bytes_to_format && (end_offset - string_min <= address))
|
---|
| 1149 | break;
|
---|
| 1150 | i = 0;
|
---|
| 1151 | while (!limit_bytes_to_format || address < end_offset) {
|
---|
| 1152 | if (i == bufsize) {
|
---|
| 1153 | bufsize += bufsize/8;
|
---|
| 1154 | buf = xrealloc(buf, bufsize);
|
---|
| 1155 | }
|
---|
| 1156 | read_char(&c);
|
---|
| 1157 | if (c < 0) { /* EOF */
|
---|
| 1158 | free(buf);
|
---|
| 1159 | return;
|
---|
| 1160 | }
|
---|
| 1161 | address++;
|
---|
| 1162 | if (!c)
|
---|
| 1163 | break;
|
---|
| 1164 | if (!ISPRINT(c))
|
---|
| 1165 | goto tryline; /* It isn't; give up on this string. */
|
---|
| 1166 | buf[i++] = c; /* String continues; store it all. */
|
---|
| 1167 | }
|
---|
| 1168 |
|
---|
| 1169 | if (i < string_min) /* Too short! */
|
---|
| 1170 | goto tryline;
|
---|
| 1171 |
|
---|
| 1172 | /* If we get here, the string is all printable and null-terminated,
|
---|
| 1173 | * so print it. It is all in 'buf' and 'i' is its length. */
|
---|
| 1174 | buf[i] = 0;
|
---|
| 1175 | format_address(address - i - 1, ' ');
|
---|
| 1176 |
|
---|
| 1177 | for (i = 0; (c = buf[i]); i++) {
|
---|
| 1178 | switch (c) {
|
---|
| 1179 | case '\007': fputs("\\a", stdout); break;
|
---|
| 1180 | case '\b': fputs("\\b", stdout); break;
|
---|
| 1181 | case '\f': fputs("\\f", stdout); break;
|
---|
| 1182 | case '\n': fputs("\\n", stdout); break;
|
---|
| 1183 | case '\r': fputs("\\r", stdout); break;
|
---|
| 1184 | case '\t': fputs("\\t", stdout); break;
|
---|
| 1185 | case '\v': fputs("\\v", stdout); break;
|
---|
| 1186 | default: putc(c, stdout);
|
---|
| 1187 | }
|
---|
| 1188 | }
|
---|
| 1189 | putchar('\n');
|
---|
| 1190 | }
|
---|
| 1191 |
|
---|
| 1192 | /* We reach this point only if we search through
|
---|
| 1193 | (max_bytes_to_format - string_min) bytes before reaching EOF. */
|
---|
| 1194 | free(buf);
|
---|
| 1195 |
|
---|
| 1196 | check_and_close();
|
---|
| 1197 | }
|
---|
| 1198 |
|
---|
| 1199 | int od_main(int argc, char **argv);
|
---|
| 1200 | int od_main(int argc, char **argv)
|
---|
| 1201 | {
|
---|
| 1202 | static const struct suffix_mult bkm[] = {
|
---|
| 1203 | { "b", 512 },
|
---|
| 1204 | { "k", 1024 },
|
---|
| 1205 | { "m", 1024*1024 },
|
---|
| 1206 | { }
|
---|
| 1207 | };
|
---|
| 1208 | unsigned opt;
|
---|
| 1209 | int l_c_m;
|
---|
| 1210 | /* The old-style 'pseudo starting address' to be printed in parentheses
|
---|
| 1211 | after any true address. */
|
---|
| 1212 | off_t pseudo_start = 0; // only for gcc
|
---|
| 1213 | enum {
|
---|
| 1214 | OPT_A = 1 << 0,
|
---|
| 1215 | OPT_N = 1 << 1,
|
---|
| 1216 | OPT_a = 1 << 2,
|
---|
| 1217 | OPT_b = 1 << 3,
|
---|
| 1218 | OPT_c = 1 << 4,
|
---|
| 1219 | OPT_d = 1 << 5,
|
---|
| 1220 | OPT_f = 1 << 6,
|
---|
| 1221 | OPT_h = 1 << 7,
|
---|
| 1222 | OPT_i = 1 << 8,
|
---|
| 1223 | OPT_j = 1 << 9,
|
---|
| 1224 | OPT_l = 1 << 10,
|
---|
| 1225 | OPT_o = 1 << 11,
|
---|
| 1226 | OPT_t = 1 << 12,
|
---|
| 1227 | OPT_v = 1 << 13,
|
---|
| 1228 | OPT_x = 1 << 14,
|
---|
| 1229 | OPT_s = 1 << 15,
|
---|
| 1230 | OPT_S = 1 << 16,
|
---|
| 1231 | OPT_w = 1 << 17,
|
---|
| 1232 | OPT_traditional = (1 << 18) * ENABLE_GETOPT_LONG,
|
---|
| 1233 | };
|
---|
| 1234 | #if ENABLE_GETOPT_LONG
|
---|
| 1235 | static const char od_longopts[] ALIGN1 =
|
---|
| 1236 | "skip-bytes\0" Required_argument "j"
|
---|
| 1237 | "address-radix\0" Required_argument "A"
|
---|
| 1238 | "read-bytes\0" Required_argument "N"
|
---|
| 1239 | "format\0" Required_argument "t"
|
---|
| 1240 | "output-duplicates\0" No_argument "v"
|
---|
| 1241 | "strings\0" Optional_argument "S"
|
---|
| 1242 | "width\0" Optional_argument "w"
|
---|
| 1243 | "traditional\0" No_argument "\xff"
|
---|
| 1244 | ;
|
---|
| 1245 | #endif
|
---|
| 1246 | char *str_A, *str_N, *str_j, *str_S;
|
---|
| 1247 | char *str_w = NULL;
|
---|
| 1248 | llist_t *lst_t = NULL;
|
---|
| 1249 |
|
---|
| 1250 | spec = NULL;
|
---|
| 1251 | format_address = format_address_std;
|
---|
| 1252 | address_base_char = 'o';
|
---|
| 1253 | address_pad_len_char = '7';
|
---|
| 1254 | /* flag_dump_strings = 0; - already is */
|
---|
| 1255 |
|
---|
| 1256 | /* Parse command line */
|
---|
| 1257 | opt_complementary = "t::"; // list
|
---|
| 1258 | #if ENABLE_GETOPT_LONG
|
---|
| 1259 | applet_long_options = od_longopts;
|
---|
| 1260 | #endif
|
---|
| 1261 | opt = getopt32(argv, "A:N:abcdfhij:lot:vxsS:"
|
---|
| 1262 | "w::", // -w with optional param
|
---|
| 1263 | // -S was -s and also had optional parameter
|
---|
| 1264 | // but in coreutils 6.3 it was renamed and now has
|
---|
| 1265 | // _mandatory_ parameter
|
---|
| 1266 | &str_A, &str_N, &str_j, &lst_t, &str_S, &str_w);
|
---|
| 1267 | argc -= optind;
|
---|
| 1268 | argv += optind;
|
---|
| 1269 | if (opt & OPT_A) {
|
---|
| 1270 | static const char doxn[] ALIGN1 = "doxn";
|
---|
| 1271 | static const char doxn_address_base_char[] ALIGN1 = {
|
---|
| 1272 | 'u', 'o', 'x', /* '?' fourth one is not important */
|
---|
| 1273 | };
|
---|
| 1274 | static const uint8_t doxn_address_pad_len_char[] ALIGN1 = {
|
---|
| 1275 | '7', '7', '6', /* '?' */
|
---|
| 1276 | };
|
---|
| 1277 | char *p;
|
---|
| 1278 | int pos;
|
---|
| 1279 | p = strchr(doxn, str_A[0]);
|
---|
| 1280 | if (!p)
|
---|
| 1281 | bb_error_msg_and_die("bad output address radix "
|
---|
| 1282 | "'%c' (must be [doxn])", str_A[0]);
|
---|
| 1283 | pos = p - doxn;
|
---|
| 1284 | if (pos == 3) format_address = format_address_none;
|
---|
| 1285 | address_base_char = doxn_address_base_char[pos];
|
---|
| 1286 | address_pad_len_char = doxn_address_pad_len_char[pos];
|
---|
| 1287 | }
|
---|
| 1288 | if (opt & OPT_N) {
|
---|
| 1289 | limit_bytes_to_format = 1;
|
---|
| 1290 | max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm);
|
---|
| 1291 | }
|
---|
| 1292 | if (opt & OPT_a) decode_format_string("a");
|
---|
| 1293 | if (opt & OPT_b) decode_format_string("oC");
|
---|
| 1294 | if (opt & OPT_c) decode_format_string("c");
|
---|
| 1295 | if (opt & OPT_d) decode_format_string("u2");
|
---|
| 1296 | if (opt & OPT_f) decode_format_string("fF");
|
---|
| 1297 | if (opt & OPT_h) decode_format_string("x2");
|
---|
| 1298 | if (opt & OPT_i) decode_format_string("d2");
|
---|
| 1299 | if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm);
|
---|
| 1300 | if (opt & OPT_l) decode_format_string("d4");
|
---|
| 1301 | if (opt & OPT_o) decode_format_string("o2");
|
---|
| 1302 | //if (opt & OPT_t)...
|
---|
| 1303 | while (lst_t) {
|
---|
| 1304 | decode_format_string(lst_t->data);
|
---|
| 1305 | lst_t = lst_t->link;
|
---|
| 1306 | }
|
---|
| 1307 | if (opt & OPT_v) verbose = 1;
|
---|
| 1308 | if (opt & OPT_x) decode_format_string("x2");
|
---|
| 1309 | if (opt & OPT_s) decode_format_string("d2");
|
---|
| 1310 | if (opt & OPT_S) {
|
---|
| 1311 | string_min = 3;
|
---|
| 1312 | string_min = xstrtou_sfx(str_S, 0, bkm);
|
---|
| 1313 | flag_dump_strings = 1;
|
---|
| 1314 | }
|
---|
| 1315 | //if (opt & OPT_w)...
|
---|
| 1316 | //if (opt & OPT_traditional)...
|
---|
| 1317 |
|
---|
| 1318 | if (flag_dump_strings && n_specs > 0)
|
---|
| 1319 | bb_error_msg_and_die("no type may be specified when dumping strings");
|
---|
| 1320 |
|
---|
| 1321 | /* If the --traditional option is used, there may be from
|
---|
| 1322 | * 0 to 3 remaining command line arguments; handle each case
|
---|
| 1323 | * separately.
|
---|
| 1324 | * od [file] [[+]offset[.][b] [[+]label[.][b]]]
|
---|
| 1325 | * The offset and pseudo_start have the same syntax.
|
---|
| 1326 | *
|
---|
| 1327 | * FIXME: POSIX 1003.1-2001 with XSI requires support for the
|
---|
| 1328 | * traditional syntax even if --traditional is not given. */
|
---|
| 1329 |
|
---|
| 1330 | #if ENABLE_GETOPT_LONG
|
---|
| 1331 | if (opt & OPT_traditional) {
|
---|
| 1332 | off_t o1, o2;
|
---|
| 1333 |
|
---|
| 1334 | if (argc == 1) {
|
---|
| 1335 | if (parse_old_offset(argv[0], &o1)) {
|
---|
| 1336 | n_bytes_to_skip = o1;
|
---|
| 1337 | --argc;
|
---|
| 1338 | ++argv;
|
---|
| 1339 | }
|
---|
| 1340 | } else if (argc == 2) {
|
---|
| 1341 | if (parse_old_offset(argv[0], &o1)
|
---|
| 1342 | && parse_old_offset(argv[1], &o2)
|
---|
| 1343 | ) {
|
---|
| 1344 | n_bytes_to_skip = o1;
|
---|
| 1345 | flag_pseudo_start = 1;
|
---|
| 1346 | pseudo_start = o2;
|
---|
| 1347 | argv += 2;
|
---|
| 1348 | argc -= 2;
|
---|
| 1349 | } else if (parse_old_offset(argv[1], &o2)) {
|
---|
| 1350 | n_bytes_to_skip = o2;
|
---|
| 1351 | --argc;
|
---|
| 1352 | argv[1] = argv[0];
|
---|
| 1353 | ++argv;
|
---|
| 1354 | } else {
|
---|
| 1355 | bb_error_msg_and_die("invalid second operand "
|
---|
| 1356 | "in compatibility mode '%s'", argv[1]);
|
---|
| 1357 | }
|
---|
| 1358 | } else if (argc == 3) {
|
---|
| 1359 | if (parse_old_offset(argv[1], &o1)
|
---|
| 1360 | && parse_old_offset(argv[2], &o2)
|
---|
| 1361 | ) {
|
---|
| 1362 | n_bytes_to_skip = o1;
|
---|
| 1363 | flag_pseudo_start = 1;
|
---|
| 1364 | pseudo_start = o2;
|
---|
| 1365 | argv[2] = argv[0];
|
---|
| 1366 | argv += 2;
|
---|
| 1367 | argc -= 2;
|
---|
| 1368 | } else {
|
---|
| 1369 | bb_error_msg_and_die("in compatibility mode "
|
---|
| 1370 | "the last two arguments must be offsets");
|
---|
| 1371 | }
|
---|
| 1372 | } else if (argc > 3) {
|
---|
| 1373 | bb_error_msg_and_die("compatibility mode supports "
|
---|
| 1374 | "at most three arguments");
|
---|
| 1375 | }
|
---|
| 1376 |
|
---|
| 1377 | if (flag_pseudo_start) {
|
---|
| 1378 | if (format_address == format_address_none) {
|
---|
| 1379 | address_base_char = 'o';
|
---|
| 1380 | address_pad_len_char = '7';
|
---|
| 1381 | format_address = format_address_paren;
|
---|
| 1382 | } else
|
---|
| 1383 | format_address = format_address_label;
|
---|
| 1384 | }
|
---|
| 1385 | }
|
---|
| 1386 | #endif
|
---|
| 1387 |
|
---|
| 1388 | if (limit_bytes_to_format) {
|
---|
| 1389 | end_offset = n_bytes_to_skip + max_bytes_to_format;
|
---|
| 1390 | if (end_offset < n_bytes_to_skip)
|
---|
| 1391 | bb_error_msg_and_die("skip-bytes + read-bytes is too large");
|
---|
| 1392 | }
|
---|
| 1393 |
|
---|
| 1394 | if (n_specs == 0) {
|
---|
| 1395 | decode_format_string("o2");
|
---|
| 1396 | n_specs = 1;
|
---|
| 1397 | }
|
---|
| 1398 |
|
---|
| 1399 | /* If no files were listed on the command line,
|
---|
| 1400 | set the global pointer FILE_LIST so that it
|
---|
| 1401 | references the null-terminated list of one name: "-". */
|
---|
| 1402 | file_list = default_file_list;
|
---|
| 1403 | if (argc > 0) {
|
---|
| 1404 | /* Set the global pointer FILE_LIST so that it
|
---|
| 1405 | references the first file-argument on the command-line. */
|
---|
| 1406 | file_list = (char const *const *) argv;
|
---|
| 1407 | }
|
---|
| 1408 |
|
---|
| 1409 | /* open the first input file */
|
---|
| 1410 | open_next_file();
|
---|
| 1411 | /* skip over any unwanted header bytes */
|
---|
| 1412 | skip(n_bytes_to_skip);
|
---|
| 1413 | if (!in_stream)
|
---|
| 1414 | return 1;
|
---|
| 1415 |
|
---|
| 1416 | pseudo_offset = (flag_pseudo_start ? pseudo_start - n_bytes_to_skip : 0);
|
---|
| 1417 |
|
---|
| 1418 | /* Compute output block length. */
|
---|
| 1419 | l_c_m = get_lcm();
|
---|
| 1420 |
|
---|
| 1421 | if (opt & OPT_w) { /* -w: width */
|
---|
| 1422 | bytes_per_block = 32;
|
---|
| 1423 | if (str_w)
|
---|
| 1424 | bytes_per_block = xatou(str_w);
|
---|
| 1425 | if (!bytes_per_block || bytes_per_block % l_c_m != 0) {
|
---|
| 1426 | bb_error_msg("warning: invalid width %zu; using %d instead",
|
---|
| 1427 | bytes_per_block, l_c_m);
|
---|
| 1428 | bytes_per_block = l_c_m;
|
---|
| 1429 | }
|
---|
| 1430 | } else {
|
---|
| 1431 | bytes_per_block = l_c_m;
|
---|
| 1432 | if (l_c_m < DEFAULT_BYTES_PER_BLOCK)
|
---|
| 1433 | bytes_per_block *= DEFAULT_BYTES_PER_BLOCK / l_c_m;
|
---|
| 1434 | }
|
---|
| 1435 |
|
---|
| 1436 | #ifdef DEBUG
|
---|
| 1437 | for (i = 0; i < n_specs; i++) {
|
---|
| 1438 | printf("%d: fmt=\"%s\" width=%d\n",
|
---|
| 1439 | i, spec[i].fmt_string, width_bytes[spec[i].size]);
|
---|
| 1440 | }
|
---|
| 1441 | #endif
|
---|
| 1442 |
|
---|
| 1443 | if (flag_dump_strings)
|
---|
| 1444 | dump_strings();
|
---|
| 1445 | else
|
---|
| 1446 | dump();
|
---|
| 1447 |
|
---|
| 1448 | if (fclose(stdin) == EOF)
|
---|
| 1449 | bb_perror_msg_and_die(bb_msg_standard_input);
|
---|
| 1450 |
|
---|
| 1451 | return ioerror;
|
---|
| 1452 | }
|
---|