[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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[3232] | 16 | Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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| 17 | */
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[1765] | 18 | /* Written by Jim Meyering. */
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[3232] | 19 | /* Busyboxed by Denys Vlasenko, based on od.c from coreutils-5.2.1 */
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[1765] | 20 |
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| 21 |
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[3232] | 22 | /* #include "libbb.h" - done in od.c */
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[3621] | 23 | #include "common_bufsiz.h"
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[3232] | 24 | #define assert(a) ((void)0)
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[1765] | 25 |
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| 26 |
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[3232] | 27 | //usage:#if ENABLE_DESKTOP
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| 28 | //usage:#define od_trivial_usage
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| 29 | //usage: "[-abcdfhilovxs] [-t TYPE] [-A RADIX] [-N SIZE] [-j SKIP] [-S MINSTR] [-w WIDTH] [FILE]..."
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| 30 | // We don't support:
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| 31 | // ... [FILE] [[+]OFFSET[.][b]]
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| 32 | // Support is buggy for:
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| 33 | // od --traditional [OPTION]... [FILE] [[+]OFFSET[.][b] [+][LABEL][.][b]]
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[1765] | 34 |
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[3232] | 35 | //usage:#define od_full_usage "\n\n"
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| 36 | //usage: "Print FILEs (or stdin) unambiguously, as octal bytes by default"
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| 37 | //usage:#endif
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[1765] | 38 |
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[3232] | 39 | enum {
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| 40 | OPT_A = 1 << 0,
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| 41 | OPT_N = 1 << 1,
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| 42 | OPT_a = 1 << 2,
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| 43 | OPT_b = 1 << 3,
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| 44 | OPT_c = 1 << 4,
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| 45 | OPT_d = 1 << 5,
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| 46 | OPT_f = 1 << 6,
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| 47 | OPT_h = 1 << 7,
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| 48 | OPT_i = 1 << 8,
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| 49 | OPT_j = 1 << 9,
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| 50 | OPT_l = 1 << 10,
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| 51 | OPT_o = 1 << 11,
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| 52 | OPT_t = 1 << 12,
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| 53 | /* When zero and two or more consecutive blocks are equal, format
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| 54 | only the first block and output an asterisk alone on the following
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| 55 | line to indicate that identical blocks have been elided: */
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| 56 | OPT_v = 1 << 13,
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| 57 | OPT_x = 1 << 14,
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| 58 | OPT_s = 1 << 15,
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| 59 | OPT_S = 1 << 16,
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| 60 | OPT_w = 1 << 17,
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| 61 | OPT_traditional = (1 << 18) * ENABLE_LONG_OPTS,
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| 62 | };
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[1765] | 63 |
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[3232] | 64 | #define OD_GETOPT32() getopt32(argv, \
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| 65 | "A:N:abcdfhij:lot:vxsS:w::", \
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| 66 | /* -w with optional param */ \
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| 67 | /* -S was -s and also had optional parameter */ \
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| 68 | /* but in coreutils 6.3 it was renamed and now has */ \
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| 69 | /* _mandatory_ parameter */ \
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[3621] | 70 | &str_A, &str_N, &str_j, &lst_t, &str_S, &G.bytes_per_block)
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[1765] | 71 |
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| 72 |
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| 73 | /* Check for 0x7f is a coreutils 6.3 addition */
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[3232] | 74 | #define ISPRINT(c) (((c) >= ' ') && (c) < 0x7f)
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[1765] | 75 |
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| 76 | typedef long double longdouble_t;
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| 77 | typedef unsigned long long ulonglong_t;
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| 78 | typedef long long llong;
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| 79 |
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| 80 | #if ENABLE_LFS
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| 81 | # define xstrtooff_sfx xstrtoull_sfx
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| 82 | #else
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| 83 | # define xstrtooff_sfx xstrtoul_sfx
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| 84 | #endif
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| 85 |
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| 86 | /* The default number of input bytes per output line. */
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| 87 | #define DEFAULT_BYTES_PER_BLOCK 16
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| 88 |
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| 89 | /* The number of decimal digits of precision in a float. */
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| 90 | #ifndef FLT_DIG
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| 91 | # define FLT_DIG 7
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| 92 | #endif
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| 93 |
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| 94 | /* The number of decimal digits of precision in a double. */
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| 95 | #ifndef DBL_DIG
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| 96 | # define DBL_DIG 15
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| 97 | #endif
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| 98 |
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| 99 | /* The number of decimal digits of precision in a long double. */
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| 100 | #ifndef LDBL_DIG
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| 101 | # define LDBL_DIG DBL_DIG
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| 102 | #endif
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| 103 |
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| 104 | enum size_spec {
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| 105 | NO_SIZE,
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| 106 | CHAR,
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| 107 | SHORT,
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| 108 | INT,
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| 109 | LONG,
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| 110 | LONG_LONG,
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| 111 | FLOAT_SINGLE,
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| 112 | FLOAT_DOUBLE,
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| 113 | FLOAT_LONG_DOUBLE,
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| 114 | N_SIZE_SPECS
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| 115 | };
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| 116 |
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| 117 | enum output_format {
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| 118 | SIGNED_DECIMAL,
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| 119 | UNSIGNED_DECIMAL,
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| 120 | OCTAL,
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| 121 | HEXADECIMAL,
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| 122 | FLOATING_POINT,
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| 123 | NAMED_CHARACTER,
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| 124 | CHARACTER
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| 125 | };
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| 126 |
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| 127 | /* Each output format specification (from '-t spec' or from
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| 128 | old-style options) is represented by one of these structures. */
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| 129 | struct tspec {
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| 130 | enum output_format fmt;
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| 131 | enum size_spec size;
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| 132 | void (*print_function) (size_t, const char *, const char *);
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| 133 | char *fmt_string;
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| 134 | int hexl_mode_trailer;
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| 135 | int field_width;
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| 136 | };
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| 137 |
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| 138 | /* Convert the number of 8-bit bytes of a binary representation to
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| 139 | the number of characters (digits + sign if the type is signed)
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| 140 | required to represent the same quantity in the specified base/type.
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| 141 | For example, a 32-bit (4-byte) quantity may require a field width
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| 142 | as wide as the following for these types:
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| 143 | 11 unsigned octal
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| 144 | 11 signed decimal
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| 145 | 10 unsigned decimal
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| 146 | 8 unsigned hexadecimal */
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| 147 |
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| 148 | static const uint8_t bytes_to_oct_digits[] ALIGN1 =
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| 149 | {0, 3, 6, 8, 11, 14, 16, 19, 22, 25, 27, 30, 32, 35, 38, 41, 43};
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| 150 |
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| 151 | static const uint8_t bytes_to_signed_dec_digits[] ALIGN1 =
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| 152 | {1, 4, 6, 8, 11, 13, 16, 18, 20, 23, 25, 28, 30, 33, 35, 37, 40};
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| 153 |
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| 154 | static const uint8_t bytes_to_unsigned_dec_digits[] ALIGN1 =
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| 155 | {0, 3, 5, 8, 10, 13, 15, 17, 20, 22, 25, 27, 29, 32, 34, 37, 39};
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| 156 |
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| 157 | static const uint8_t bytes_to_hex_digits[] ALIGN1 =
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| 158 | {0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32};
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| 159 |
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| 160 | /* Convert enum size_spec to the size of the named type. */
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| 161 | static const signed char width_bytes[] ALIGN1 = {
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| 162 | -1,
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| 163 | sizeof(char),
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| 164 | sizeof(short),
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| 165 | sizeof(int),
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| 166 | sizeof(long),
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| 167 | sizeof(ulonglong_t),
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| 168 | sizeof(float),
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| 169 | sizeof(double),
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| 170 | sizeof(longdouble_t)
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| 171 | };
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| 172 | /* Ensure that for each member of 'enum size_spec' there is an
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| 173 | initializer in the width_bytes array. */
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| 174 | struct ERR_width_bytes_has_bad_size {
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| 175 | char ERR_width_bytes_has_bad_size[ARRAY_SIZE(width_bytes) == N_SIZE_SPECS ? 1 : -1];
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| 176 | };
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| 177 |
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[3621] | 178 | struct globals {
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| 179 | smallint exit_code;
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[1765] | 180 |
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[3621] | 181 | unsigned string_min;
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[1765] | 182 |
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[3621] | 183 | /* An array of specs describing how to format each input block. */
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| 184 | unsigned n_specs;
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| 185 | struct tspec *spec;
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[1765] | 186 |
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[3621] | 187 | /* Function that accepts an address and an optional following char,
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| 188 | and prints the address and char to stdout. */
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| 189 | void (*format_address)(off_t, char);
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| 190 |
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| 191 | /* The difference between the old-style pseudo starting address and
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| 192 | the number of bytes to skip. */
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[3232] | 193 | #if ENABLE_LONG_OPTS
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[3621] | 194 | off_t pseudo_offset;
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| 195 | # define G_pseudo_offset G.pseudo_offset
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[3232] | 196 | #endif
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[3621] | 197 | /* When zero, MAX_BYTES_TO_FORMAT and END_OFFSET are ignored, and all
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| 198 | input is formatted. */
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[1765] | 199 |
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[3621] | 200 | /* The number of input bytes formatted per output line. It must be
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| 201 | a multiple of the least common multiple of the sizes associated with
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| 202 | the specified output types. It should be as large as possible, but
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| 203 | no larger than 16 -- unless specified with the -w option. */
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| 204 | unsigned bytes_per_block; /* have to use unsigned, not size_t */
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[1765] | 205 |
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[3621] | 206 | /* A NULL-terminated list of the file-arguments from the command line. */
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| 207 | const char *const *file_list;
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[1765] | 208 |
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[3621] | 209 | /* The input stream associated with the current file. */
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| 210 | FILE *in_stream;
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[1765] | 211 |
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[3621] | 212 | bool not_first;
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| 213 | bool prev_pair_equal;
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| 214 | } FIX_ALIASING;
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| 215 | #if !ENABLE_LONG_OPTS
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| 216 | enum { G_pseudo_offset = 0 };
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| 217 | #endif
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| 218 | #define G (*(struct globals*)bb_common_bufsiz1)
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| 219 | #define INIT_G() do { \
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| 220 | setup_common_bufsiz(); \
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| 221 | BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
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| 222 | G.bytes_per_block = 32; \
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| 223 | } while (0)
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| 224 |
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| 225 |
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[1765] | 226 | #define MAX_INTEGRAL_TYPE_SIZE sizeof(ulonglong_t)
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[2725] | 227 | static const unsigned char integral_type_size[MAX_INTEGRAL_TYPE_SIZE + 1] ALIGN1 = {
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[1765] | 228 | [sizeof(char)] = CHAR,
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| 229 | #if USHRT_MAX != UCHAR_MAX
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| 230 | [sizeof(short)] = SHORT,
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| 231 | #endif
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| 232 | #if UINT_MAX != USHRT_MAX
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| 233 | [sizeof(int)] = INT,
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| 234 | #endif
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| 235 | #if ULONG_MAX != UINT_MAX
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| 236 | [sizeof(long)] = LONG,
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| 237 | #endif
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| 238 | #if ULLONG_MAX != ULONG_MAX
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| 239 | [sizeof(ulonglong_t)] = LONG_LONG,
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| 240 | #endif
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| 241 | };
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| 242 |
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| 243 | #define MAX_FP_TYPE_SIZE sizeof(longdouble_t)
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[2725] | 244 | static const unsigned char fp_type_size[MAX_FP_TYPE_SIZE + 1] ALIGN1 = {
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[3232] | 245 | /* gcc seems to allow repeated indexes. Last one wins */
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[1765] | 246 | [sizeof(longdouble_t)] = FLOAT_LONG_DOUBLE,
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| 247 | [sizeof(double)] = FLOAT_DOUBLE,
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| 248 | [sizeof(float)] = FLOAT_SINGLE
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| 249 | };
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| 250 |
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| 251 |
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| 252 | static unsigned
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| 253 | gcd(unsigned u, unsigned v)
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| 254 | {
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| 255 | unsigned t;
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| 256 | while (v != 0) {
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| 257 | t = u % v;
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| 258 | u = v;
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| 259 | v = t;
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| 260 | }
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| 261 | return u;
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| 262 | }
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| 263 |
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| 264 | /* Compute the least common multiple of U and V. */
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| 265 | static unsigned
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| 266 | lcm(unsigned u, unsigned v) {
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| 267 | unsigned t = gcd(u, v);
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| 268 | if (t == 0)
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| 269 | return 0;
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| 270 | return u * v / t;
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| 271 | }
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| 272 |
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| 273 | static void
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| 274 | print_s_char(size_t n_bytes, const char *block, const char *fmt_string)
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| 275 | {
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| 276 | while (n_bytes--) {
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| 277 | int tmp = *(signed char *) block;
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| 278 | printf(fmt_string, tmp);
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| 279 | block += sizeof(unsigned char);
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| 280 | }
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| 281 | }
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| 282 |
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| 283 | static void
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| 284 | print_char(size_t n_bytes, const char *block, const char *fmt_string)
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| 285 | {
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| 286 | while (n_bytes--) {
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| 287 | unsigned tmp = *(unsigned char *) block;
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| 288 | printf(fmt_string, tmp);
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| 289 | block += sizeof(unsigned char);
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| 290 | }
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| 291 | }
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| 292 |
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| 293 | static void
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| 294 | print_s_short(size_t n_bytes, const char *block, const char *fmt_string)
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| 295 | {
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| 296 | n_bytes /= sizeof(signed short);
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| 297 | while (n_bytes--) {
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| 298 | int tmp = *(signed short *) block;
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| 299 | printf(fmt_string, tmp);
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| 300 | block += sizeof(unsigned short);
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| 301 | }
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| 302 | }
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| 303 |
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| 304 | static void
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| 305 | print_short(size_t n_bytes, const char *block, const char *fmt_string)
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| 306 | {
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| 307 | n_bytes /= sizeof(unsigned short);
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| 308 | while (n_bytes--) {
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| 309 | unsigned tmp = *(unsigned short *) block;
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| 310 | printf(fmt_string, tmp);
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| 311 | block += sizeof(unsigned short);
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| 312 | }
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| 313 | }
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| 314 |
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| 315 | static void
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| 316 | print_int(size_t n_bytes, const char *block, const char *fmt_string)
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| 317 | {
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| 318 | n_bytes /= sizeof(unsigned);
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| 319 | while (n_bytes--) {
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| 320 | unsigned tmp = *(unsigned *) block;
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| 321 | printf(fmt_string, tmp);
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| 322 | block += sizeof(unsigned);
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| 323 | }
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| 324 | }
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| 325 |
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| 326 | #if UINT_MAX == ULONG_MAX
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| 327 | # define print_long print_int
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| 328 | #else
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| 329 | static void
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| 330 | print_long(size_t n_bytes, const char *block, const char *fmt_string)
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| 331 | {
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| 332 | n_bytes /= sizeof(unsigned long);
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| 333 | while (n_bytes--) {
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| 334 | unsigned long tmp = *(unsigned long *) block;
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| 335 | printf(fmt_string, tmp);
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| 336 | block += sizeof(unsigned long);
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| 337 | }
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| 338 | }
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| 339 | #endif
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| 340 |
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| 341 | #if ULONG_MAX == ULLONG_MAX
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| 342 | # define print_long_long print_long
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| 343 | #else
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| 344 | static void
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| 345 | print_long_long(size_t n_bytes, const char *block, const char *fmt_string)
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| 346 | {
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| 347 | n_bytes /= sizeof(ulonglong_t);
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| 348 | while (n_bytes--) {
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| 349 | ulonglong_t tmp = *(ulonglong_t *) block;
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| 350 | printf(fmt_string, tmp);
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| 351 | block += sizeof(ulonglong_t);
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| 352 | }
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| 353 | }
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| 354 | #endif
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| 355 |
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| 356 | static void
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| 357 | print_float(size_t n_bytes, const char *block, const char *fmt_string)
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| 358 | {
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| 359 | n_bytes /= sizeof(float);
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| 360 | while (n_bytes--) {
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| 361 | float tmp = *(float *) block;
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| 362 | printf(fmt_string, tmp);
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| 363 | block += sizeof(float);
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| 364 | }
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| 365 | }
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| 366 |
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| 367 | static void
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| 368 | print_double(size_t n_bytes, const char *block, const char *fmt_string)
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| 369 | {
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| 370 | n_bytes /= sizeof(double);
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| 371 | while (n_bytes--) {
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| 372 | double tmp = *(double *) block;
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| 373 | printf(fmt_string, tmp);
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| 374 | block += sizeof(double);
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| 375 | }
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| 376 | }
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| 377 |
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| 378 | static void
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| 379 | print_long_double(size_t n_bytes, const char *block, const char *fmt_string)
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| 380 | {
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| 381 | n_bytes /= sizeof(longdouble_t);
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| 382 | while (n_bytes--) {
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| 383 | longdouble_t tmp = *(longdouble_t *) block;
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| 384 | printf(fmt_string, tmp);
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| 385 | block += sizeof(longdouble_t);
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| 386 | }
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| 387 | }
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| 388 |
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| 389 | /* print_[named]_ascii are optimized for speed.
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[2725] | 390 | * Remember, someday you may want to pump gigabytes through this thing.
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[1765] | 391 | * Saving a dozen of .text bytes here is counter-productive */
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| 392 |
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| 393 | static void
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| 394 | print_named_ascii(size_t n_bytes, const char *block,
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[2725] | 395 | const char *unused_fmt_string UNUSED_PARAM)
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[1765] | 396 | {
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| 397 | /* Names for some non-printing characters. */
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| 398 | static const char charname[33][3] ALIGN1 = {
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| 399 | "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
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| 400 | " bs", " ht", " nl", " vt", " ff", " cr", " so", " si",
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| 401 | "dle", "dc1", "dc2", "dc3", "dc4", "nak", "syn", "etb",
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| 402 | "can", " em", "sub", "esc", " fs", " gs", " rs", " us",
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| 403 | " sp"
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| 404 | };
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| 405 | // buf[N] pos: 01234 56789
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[3621] | 406 | char buf[12] = " x\0 xxx\0";
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[1765] | 407 | // [12] because we take three 32bit stack slots anyway, and
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| 408 | // gcc is too dumb to initialize with constant stores,
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| 409 | // it copies initializer from rodata. Oh well.
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[3621] | 410 | // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65410
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[1765] | 411 |
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| 412 | while (n_bytes--) {
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| 413 | unsigned masked_c = *(unsigned char *) block++;
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| 414 |
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| 415 | masked_c &= 0x7f;
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| 416 | if (masked_c == 0x7f) {
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| 417 | fputs(" del", stdout);
|
---|
| 418 | continue;
|
---|
| 419 | }
|
---|
| 420 | if (masked_c > ' ') {
|
---|
| 421 | buf[3] = masked_c;
|
---|
| 422 | fputs(buf, stdout);
|
---|
| 423 | continue;
|
---|
| 424 | }
|
---|
| 425 | /* Why? Because printf(" %3.3s") is much slower... */
|
---|
| 426 | buf[6] = charname[masked_c][0];
|
---|
| 427 | buf[7] = charname[masked_c][1];
|
---|
| 428 | buf[8] = charname[masked_c][2];
|
---|
| 429 | fputs(buf+5, stdout);
|
---|
| 430 | }
|
---|
| 431 | }
|
---|
| 432 |
|
---|
| 433 | static void
|
---|
| 434 | print_ascii(size_t n_bytes, const char *block,
|
---|
[2725] | 435 | const char *unused_fmt_string UNUSED_PARAM)
|
---|
[1765] | 436 | {
|
---|
| 437 | // buf[N] pos: 01234 56789
|
---|
[3621] | 438 | char buf[12] = " x\0 xxx\0";
|
---|
[1765] | 439 |
|
---|
| 440 | while (n_bytes--) {
|
---|
| 441 | const char *s;
|
---|
| 442 | unsigned c = *(unsigned char *) block++;
|
---|
| 443 |
|
---|
| 444 | if (ISPRINT(c)) {
|
---|
| 445 | buf[3] = c;
|
---|
| 446 | fputs(buf, stdout);
|
---|
| 447 | continue;
|
---|
| 448 | }
|
---|
| 449 | switch (c) {
|
---|
| 450 | case '\0':
|
---|
| 451 | s = " \\0";
|
---|
| 452 | break;
|
---|
| 453 | case '\007':
|
---|
| 454 | s = " \\a";
|
---|
| 455 | break;
|
---|
| 456 | case '\b':
|
---|
| 457 | s = " \\b";
|
---|
| 458 | break;
|
---|
| 459 | case '\f':
|
---|
| 460 | s = " \\f";
|
---|
| 461 | break;
|
---|
| 462 | case '\n':
|
---|
| 463 | s = " \\n";
|
---|
| 464 | break;
|
---|
| 465 | case '\r':
|
---|
| 466 | s = " \\r";
|
---|
| 467 | break;
|
---|
| 468 | case '\t':
|
---|
| 469 | s = " \\t";
|
---|
| 470 | break;
|
---|
| 471 | case '\v':
|
---|
| 472 | s = " \\v";
|
---|
| 473 | break;
|
---|
[3621] | 474 | default:
|
---|
| 475 | buf[6] = (c >> 6 & 3) + '0';
|
---|
| 476 | buf[7] = (c >> 3 & 7) + '0';
|
---|
[1765] | 477 | buf[8] = (c & 7) + '0';
|
---|
| 478 | s = buf + 5;
|
---|
| 479 | }
|
---|
| 480 | fputs(s, stdout);
|
---|
| 481 | }
|
---|
| 482 | }
|
---|
| 483 |
|
---|
| 484 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 485 | file pointer IN_STREAM and the global string INPUT_FILENAME to the
|
---|
| 486 | first one that can be successfully opened. Modify FILE_LIST to
|
---|
| 487 | reference the next filename in the list. A file name of "-" is
|
---|
| 488 | interpreted as standard input. If any file open fails, give an error
|
---|
| 489 | message and return nonzero. */
|
---|
| 490 |
|
---|
| 491 | static void
|
---|
| 492 | open_next_file(void)
|
---|
| 493 | {
|
---|
| 494 | while (1) {
|
---|
[3621] | 495 | if (!*G.file_list)
|
---|
[1765] | 496 | return;
|
---|
[3621] | 497 | G.in_stream = fopen_or_warn_stdin(*G.file_list++);
|
---|
| 498 | if (G.in_stream) {
|
---|
[1765] | 499 | break;
|
---|
| 500 | }
|
---|
[3621] | 501 | G.exit_code = 1;
|
---|
[1765] | 502 | }
|
---|
| 503 |
|
---|
[3232] | 504 | if ((option_mask32 & (OPT_N|OPT_S)) == OPT_N)
|
---|
[3621] | 505 | setbuf(G.in_stream, NULL);
|
---|
[1765] | 506 | }
|
---|
| 507 |
|
---|
| 508 | /* Test whether there have been errors on in_stream, and close it if
|
---|
| 509 | it is not standard input. Return nonzero if there has been an error
|
---|
| 510 | on in_stream or stdout; return zero otherwise. This function will
|
---|
| 511 | report more than one error only if both a read and a write error
|
---|
| 512 | have occurred. IN_ERRNO, if nonzero, is the error number
|
---|
| 513 | corresponding to the most recent action for IN_STREAM. */
|
---|
| 514 |
|
---|
| 515 | static void
|
---|
| 516 | check_and_close(void)
|
---|
| 517 | {
|
---|
[3621] | 518 | if (G.in_stream) {
|
---|
| 519 | if (ferror(G.in_stream)) {
|
---|
| 520 | bb_error_msg("%s: read error", (G.in_stream == stdin)
|
---|
[2725] | 521 | ? bb_msg_standard_input
|
---|
[3621] | 522 | : G.file_list[-1]
|
---|
[2725] | 523 | );
|
---|
[3621] | 524 | G.exit_code = 1;
|
---|
[1765] | 525 | }
|
---|
[3621] | 526 | fclose_if_not_stdin(G.in_stream);
|
---|
| 527 | G.in_stream = NULL;
|
---|
[1765] | 528 | }
|
---|
| 529 |
|
---|
| 530 | if (ferror(stdout)) {
|
---|
[3232] | 531 | bb_error_msg_and_die(bb_msg_write_error);
|
---|
[1765] | 532 | }
|
---|
| 533 | }
|
---|
| 534 |
|
---|
| 535 | /* If S points to a single valid modern od format string, put
|
---|
[2725] | 536 | a description of that format in *TSPEC, return pointer to
|
---|
| 537 | character following the just-decoded format.
|
---|
| 538 | For example, if S were "d4afL", we will return a rtp to "afL"
|
---|
| 539 | and *TSPEC would be
|
---|
[1765] | 540 | {
|
---|
| 541 | fmt = SIGNED_DECIMAL;
|
---|
| 542 | size = INT or LONG; (whichever integral_type_size[4] resolves to)
|
---|
| 543 | print_function = print_int; (assuming size == INT)
|
---|
| 544 | fmt_string = "%011d%c";
|
---|
| 545 | }
|
---|
| 546 | S_ORIG is solely for reporting errors. It should be the full format
|
---|
| 547 | string argument. */
|
---|
| 548 |
|
---|
[2725] | 549 | static NOINLINE const char *
|
---|
| 550 | decode_one_format(const char *s_orig, const char *s, struct tspec *tspec)
|
---|
[1765] | 551 | {
|
---|
| 552 | enum size_spec size_spec;
|
---|
| 553 | unsigned size;
|
---|
| 554 | enum output_format fmt;
|
---|
| 555 | const char *p;
|
---|
| 556 | char *end;
|
---|
| 557 | char *fmt_string = NULL;
|
---|
| 558 | void (*print_function) (size_t, const char *, const char *);
|
---|
| 559 | unsigned c;
|
---|
| 560 | unsigned field_width = 0;
|
---|
| 561 | int pos;
|
---|
| 562 |
|
---|
| 563 | switch (*s) {
|
---|
| 564 | case 'd':
|
---|
| 565 | case 'o':
|
---|
| 566 | case 'u':
|
---|
| 567 | case 'x': {
|
---|
| 568 | static const char CSIL[] ALIGN1 = "CSIL";
|
---|
| 569 |
|
---|
| 570 | c = *s++;
|
---|
| 571 | p = strchr(CSIL, *s);
|
---|
[2725] | 572 | /* if *s == NUL, p != NULL! Testcase: "od -tx" */
|
---|
| 573 | if (!p || *p == '\0') {
|
---|
[1765] | 574 | size = sizeof(int);
|
---|
| 575 | if (isdigit(s[0])) {
|
---|
| 576 | size = bb_strtou(s, &end, 0);
|
---|
| 577 | if (errno == ERANGE
|
---|
| 578 | || MAX_INTEGRAL_TYPE_SIZE < size
|
---|
| 579 | || integral_type_size[size] == NO_SIZE
|
---|
| 580 | ) {
|
---|
| 581 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 582 | "%u-byte %s type is not supported",
|
---|
| 583 | s_orig, size, "integral");
|
---|
| 584 | }
|
---|
| 585 | s = end;
|
---|
| 586 | }
|
---|
| 587 | } else {
|
---|
[2725] | 588 | static const uint8_t CSIL_sizeof[4] = {
|
---|
[1765] | 589 | sizeof(char),
|
---|
| 590 | sizeof(short),
|
---|
| 591 | sizeof(int),
|
---|
| 592 | sizeof(long),
|
---|
| 593 | };
|
---|
| 594 | size = CSIL_sizeof[p - CSIL];
|
---|
[2725] | 595 | s++; /* skip C/S/I/L */
|
---|
[1765] | 596 | }
|
---|
| 597 |
|
---|
| 598 | #define ISPEC_TO_FORMAT(Spec, Min_format, Long_format, Max_format) \
|
---|
| 599 | ((Spec) == LONG_LONG ? (Max_format) \
|
---|
| 600 | : ((Spec) == LONG ? (Long_format) : (Min_format)))
|
---|
| 601 |
|
---|
| 602 | #define FMT_BYTES_ALLOCATED 9
|
---|
| 603 | size_spec = integral_type_size[size];
|
---|
| 604 |
|
---|
| 605 | {
|
---|
| 606 | static const char doux[] ALIGN1 = "doux";
|
---|
| 607 | static const char doux_fmt_letter[][4] = {
|
---|
| 608 | "lld", "llo", "llu", "llx"
|
---|
| 609 | };
|
---|
| 610 | static const enum output_format doux_fmt[] = {
|
---|
| 611 | SIGNED_DECIMAL,
|
---|
| 612 | OCTAL,
|
---|
| 613 | UNSIGNED_DECIMAL,
|
---|
| 614 | HEXADECIMAL,
|
---|
| 615 | };
|
---|
| 616 | static const uint8_t *const doux_bytes_to_XXX[] = {
|
---|
| 617 | bytes_to_signed_dec_digits,
|
---|
| 618 | bytes_to_oct_digits,
|
---|
| 619 | bytes_to_unsigned_dec_digits,
|
---|
| 620 | bytes_to_hex_digits,
|
---|
| 621 | };
|
---|
| 622 | static const char doux_fmtstring[][sizeof(" %%0%u%s")] = {
|
---|
| 623 | " %%%u%s",
|
---|
| 624 | " %%0%u%s",
|
---|
| 625 | " %%%u%s",
|
---|
| 626 | " %%0%u%s",
|
---|
| 627 | };
|
---|
| 628 |
|
---|
| 629 | pos = strchr(doux, c) - doux;
|
---|
| 630 | fmt = doux_fmt[pos];
|
---|
| 631 | field_width = doux_bytes_to_XXX[pos][size];
|
---|
| 632 | p = doux_fmt_letter[pos] + 2;
|
---|
| 633 | if (size_spec == LONG) p--;
|
---|
| 634 | if (size_spec == LONG_LONG) p -= 2;
|
---|
| 635 | fmt_string = xasprintf(doux_fmtstring[pos], field_width, p);
|
---|
| 636 | }
|
---|
| 637 |
|
---|
| 638 | switch (size_spec) {
|
---|
| 639 | case CHAR:
|
---|
| 640 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 641 | ? print_s_char
|
---|
| 642 | : print_char);
|
---|
| 643 | break;
|
---|
| 644 | case SHORT:
|
---|
| 645 | print_function = (fmt == SIGNED_DECIMAL
|
---|
| 646 | ? print_s_short
|
---|
| 647 | : print_short);
|
---|
| 648 | break;
|
---|
| 649 | case INT:
|
---|
| 650 | print_function = print_int;
|
---|
| 651 | break;
|
---|
| 652 | case LONG:
|
---|
| 653 | print_function = print_long;
|
---|
| 654 | break;
|
---|
| 655 | default: /* case LONG_LONG: */
|
---|
| 656 | print_function = print_long_long;
|
---|
| 657 | break;
|
---|
| 658 | }
|
---|
| 659 | break;
|
---|
| 660 | }
|
---|
| 661 |
|
---|
| 662 | case 'f': {
|
---|
| 663 | static const char FDL[] ALIGN1 = "FDL";
|
---|
| 664 |
|
---|
| 665 | fmt = FLOATING_POINT;
|
---|
| 666 | ++s;
|
---|
| 667 | p = strchr(FDL, *s);
|
---|
| 668 | if (!p) {
|
---|
| 669 | size = sizeof(double);
|
---|
| 670 | if (isdigit(s[0])) {
|
---|
| 671 | size = bb_strtou(s, &end, 0);
|
---|
| 672 | if (errno == ERANGE || size > MAX_FP_TYPE_SIZE
|
---|
| 673 | || fp_type_size[size] == NO_SIZE
|
---|
| 674 | ) {
|
---|
| 675 | bb_error_msg_and_die("invalid type string '%s'; "
|
---|
| 676 | "%u-byte %s type is not supported",
|
---|
| 677 | s_orig, size, "floating point");
|
---|
| 678 | }
|
---|
| 679 | s = end;
|
---|
| 680 | }
|
---|
| 681 | } else {
|
---|
| 682 | static const uint8_t FDL_sizeof[] = {
|
---|
| 683 | sizeof(float),
|
---|
| 684 | sizeof(double),
|
---|
| 685 | sizeof(longdouble_t),
|
---|
| 686 | };
|
---|
| 687 |
|
---|
| 688 | size = FDL_sizeof[p - FDL];
|
---|
| 689 | }
|
---|
| 690 |
|
---|
| 691 | size_spec = fp_type_size[size];
|
---|
| 692 |
|
---|
| 693 | switch (size_spec) {
|
---|
| 694 | case FLOAT_SINGLE:
|
---|
| 695 | print_function = print_float;
|
---|
| 696 | field_width = FLT_DIG + 8;
|
---|
| 697 | /* Don't use %#e; not all systems support it. */
|
---|
| 698 | fmt_string = xasprintf(" %%%d.%de", field_width, FLT_DIG);
|
---|
| 699 | break;
|
---|
| 700 | case FLOAT_DOUBLE:
|
---|
| 701 | print_function = print_double;
|
---|
| 702 | field_width = DBL_DIG + 8;
|
---|
| 703 | fmt_string = xasprintf(" %%%d.%de", field_width, DBL_DIG);
|
---|
| 704 | break;
|
---|
| 705 | default: /* case FLOAT_LONG_DOUBLE: */
|
---|
| 706 | print_function = print_long_double;
|
---|
| 707 | field_width = LDBL_DIG + 8;
|
---|
| 708 | fmt_string = xasprintf(" %%%d.%dLe", field_width, LDBL_DIG);
|
---|
| 709 | break;
|
---|
| 710 | }
|
---|
| 711 | break;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
| 714 | case 'a':
|
---|
| 715 | ++s;
|
---|
| 716 | fmt = NAMED_CHARACTER;
|
---|
| 717 | size_spec = CHAR;
|
---|
| 718 | print_function = print_named_ascii;
|
---|
| 719 | field_width = 3;
|
---|
| 720 | break;
|
---|
| 721 | case 'c':
|
---|
| 722 | ++s;
|
---|
| 723 | fmt = CHARACTER;
|
---|
| 724 | size_spec = CHAR;
|
---|
| 725 | print_function = print_ascii;
|
---|
| 726 | field_width = 3;
|
---|
| 727 | break;
|
---|
| 728 | default:
|
---|
| 729 | bb_error_msg_and_die("invalid character '%c' "
|
---|
| 730 | "in type string '%s'", *s, s_orig);
|
---|
| 731 | }
|
---|
| 732 |
|
---|
| 733 | tspec->size = size_spec;
|
---|
| 734 | tspec->fmt = fmt;
|
---|
| 735 | tspec->print_function = print_function;
|
---|
| 736 | tspec->fmt_string = fmt_string;
|
---|
| 737 |
|
---|
| 738 | tspec->field_width = field_width;
|
---|
| 739 | tspec->hexl_mode_trailer = (*s == 'z');
|
---|
| 740 | if (tspec->hexl_mode_trailer)
|
---|
| 741 | s++;
|
---|
| 742 |
|
---|
[2725] | 743 | return s;
|
---|
[1765] | 744 | }
|
---|
| 745 |
|
---|
| 746 | /* Decode the modern od format string S. Append the decoded
|
---|
| 747 | representation to the global array SPEC, reallocating SPEC if
|
---|
[2725] | 748 | necessary. */
|
---|
[1765] | 749 |
|
---|
| 750 | static void
|
---|
| 751 | decode_format_string(const char *s)
|
---|
| 752 | {
|
---|
| 753 | const char *s_orig = s;
|
---|
| 754 |
|
---|
| 755 | while (*s != '\0') {
|
---|
| 756 | struct tspec tspec;
|
---|
| 757 | const char *next;
|
---|
| 758 |
|
---|
[2725] | 759 | next = decode_one_format(s_orig, s, &tspec);
|
---|
[1765] | 760 |
|
---|
| 761 | assert(s != next);
|
---|
| 762 | s = next;
|
---|
[3621] | 763 | G.spec = xrealloc_vector(G.spec, 4, G.n_specs);
|
---|
| 764 | memcpy(&G.spec[G.n_specs], &tspec, sizeof(G.spec[0]));
|
---|
| 765 | G.n_specs++;
|
---|
[1765] | 766 | }
|
---|
| 767 | }
|
---|
| 768 |
|
---|
| 769 | /* Given a list of one or more input filenames FILE_LIST, set the global
|
---|
| 770 | file pointer IN_STREAM to position N_SKIP in the concatenation of
|
---|
| 771 | those files. If any file operation fails or if there are fewer than
|
---|
| 772 | N_SKIP bytes in the combined input, give an error message and return
|
---|
| 773 | nonzero. When possible, use seek rather than read operations to
|
---|
| 774 | advance IN_STREAM. */
|
---|
| 775 |
|
---|
| 776 | static void
|
---|
| 777 | skip(off_t n_skip)
|
---|
| 778 | {
|
---|
| 779 | if (n_skip == 0)
|
---|
| 780 | return;
|
---|
| 781 |
|
---|
[3621] | 782 | while (G.in_stream) { /* !EOF */
|
---|
[1765] | 783 | struct stat file_stats;
|
---|
| 784 |
|
---|
| 785 | /* First try seeking. For large offsets, this extra work is
|
---|
| 786 | worthwhile. If the offset is below some threshold it may be
|
---|
| 787 | more efficient to move the pointer by reading. There are two
|
---|
| 788 | issues when trying to seek:
|
---|
| 789 | - the file must be seekable.
|
---|
| 790 | - before seeking to the specified position, make sure
|
---|
| 791 | that the new position is in the current file.
|
---|
| 792 | Try to do that by getting file's size using fstat.
|
---|
| 793 | But that will work only for regular files. */
|
---|
| 794 |
|
---|
| 795 | /* The st_size field is valid only for regular files
|
---|
| 796 | (and for symbolic links, which cannot occur here).
|
---|
| 797 | If the number of bytes left to skip is at least
|
---|
| 798 | as large as the size of the current file, we can
|
---|
| 799 | decrement n_skip and go on to the next file. */
|
---|
[3621] | 800 | if (fstat(fileno(G.in_stream), &file_stats) == 0
|
---|
[2725] | 801 | && S_ISREG(file_stats.st_mode) && file_stats.st_size > 0
|
---|
[1765] | 802 | ) {
|
---|
| 803 | if (file_stats.st_size < n_skip) {
|
---|
| 804 | n_skip -= file_stats.st_size;
|
---|
[2725] | 805 | /* take "check & close / open_next" route */
|
---|
[1765] | 806 | } else {
|
---|
[3621] | 807 | if (fseeko(G.in_stream, n_skip, SEEK_CUR) != 0)
|
---|
| 808 | G.exit_code = 1;
|
---|
[1765] | 809 | return;
|
---|
| 810 | }
|
---|
| 811 | } else {
|
---|
[2725] | 812 | /* If it's not a regular file with positive size,
|
---|
[1765] | 813 | position the file pointer by reading. */
|
---|
[2725] | 814 | char buf[1024];
|
---|
| 815 | size_t n_bytes_to_read = 1024;
|
---|
| 816 | size_t n_bytes_read;
|
---|
[1765] | 817 |
|
---|
| 818 | while (n_skip > 0) {
|
---|
| 819 | if (n_skip < n_bytes_to_read)
|
---|
| 820 | n_bytes_to_read = n_skip;
|
---|
[3621] | 821 | n_bytes_read = fread(buf, 1, n_bytes_to_read, G.in_stream);
|
---|
[1765] | 822 | n_skip -= n_bytes_read;
|
---|
| 823 | if (n_bytes_read != n_bytes_to_read)
|
---|
| 824 | break; /* EOF on this file or error */
|
---|
| 825 | }
|
---|
| 826 | }
|
---|
| 827 | if (n_skip == 0)
|
---|
| 828 | return;
|
---|
| 829 |
|
---|
| 830 | check_and_close();
|
---|
| 831 | open_next_file();
|
---|
| 832 | }
|
---|
| 833 |
|
---|
| 834 | if (n_skip)
|
---|
[2725] | 835 | bb_error_msg_and_die("can't skip past end of combined input");
|
---|
[1765] | 836 | }
|
---|
| 837 |
|
---|
| 838 |
|
---|
| 839 | typedef void FN_format_address(off_t address, char c);
|
---|
| 840 |
|
---|
| 841 | static void
|
---|
[2725] | 842 | format_address_none(off_t address UNUSED_PARAM, char c UNUSED_PARAM)
|
---|
[1765] | 843 | {
|
---|
| 844 | }
|
---|
| 845 |
|
---|
| 846 | static char address_fmt[] ALIGN1 = "%0n"OFF_FMT"xc";
|
---|
| 847 | /* Corresponds to 'x' above */
|
---|
| 848 | #define address_base_char address_fmt[sizeof(address_fmt)-3]
|
---|
| 849 | /* Corresponds to 'n' above */
|
---|
| 850 | #define address_pad_len_char address_fmt[2]
|
---|
| 851 |
|
---|
| 852 | static void
|
---|
| 853 | format_address_std(off_t address, char c)
|
---|
| 854 | {
|
---|
| 855 | /* Corresponds to 'c' */
|
---|
| 856 | address_fmt[sizeof(address_fmt)-2] = c;
|
---|
| 857 | printf(address_fmt, address);
|
---|
| 858 | }
|
---|
| 859 |
|
---|
[2725] | 860 | #if ENABLE_LONG_OPTS
|
---|
[1765] | 861 | /* only used with --traditional */
|
---|
| 862 | static void
|
---|
| 863 | format_address_paren(off_t address, char c)
|
---|
| 864 | {
|
---|
| 865 | putchar('(');
|
---|
| 866 | format_address_std(address, ')');
|
---|
| 867 | if (c) putchar(c);
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 | static void
|
---|
| 871 | format_address_label(off_t address, char c)
|
---|
| 872 | {
|
---|
| 873 | format_address_std(address, ' ');
|
---|
[3621] | 874 | format_address_paren(address + G_pseudo_offset, c);
|
---|
[1765] | 875 | }
|
---|
| 876 | #endif
|
---|
| 877 |
|
---|
| 878 | static void
|
---|
| 879 | dump_hexl_mode_trailer(size_t n_bytes, const char *block)
|
---|
| 880 | {
|
---|
| 881 | fputs(" >", stdout);
|
---|
| 882 | while (n_bytes--) {
|
---|
| 883 | unsigned c = *(unsigned char *) block++;
|
---|
| 884 | c = (ISPRINT(c) ? c : '.');
|
---|
| 885 | putchar(c);
|
---|
| 886 | }
|
---|
| 887 | putchar('<');
|
---|
| 888 | }
|
---|
| 889 |
|
---|
| 890 | /* Write N_BYTES bytes from CURR_BLOCK to standard output once for each
|
---|
| 891 | of the N_SPEC format specs. CURRENT_OFFSET is the byte address of
|
---|
| 892 | CURR_BLOCK in the concatenation of input files, and it is printed
|
---|
| 893 | (optionally) only before the output line associated with the first
|
---|
| 894 | format spec. When duplicate blocks are being abbreviated, the output
|
---|
| 895 | for a sequence of identical input blocks is the output for the first
|
---|
| 896 | block followed by an asterisk alone on a line. It is valid to compare
|
---|
| 897 | the blocks PREV_BLOCK and CURR_BLOCK only when N_BYTES == BYTES_PER_BLOCK.
|
---|
| 898 | That condition may be false only for the last input block -- and then
|
---|
| 899 | only when it has not been padded to length BYTES_PER_BLOCK. */
|
---|
| 900 |
|
---|
| 901 | static void
|
---|
| 902 | write_block(off_t current_offset, size_t n_bytes,
|
---|
| 903 | const char *prev_block, const char *curr_block)
|
---|
| 904 | {
|
---|
[3621] | 905 | unsigned i;
|
---|
[1765] | 906 |
|
---|
[3232] | 907 | if (!(option_mask32 & OPT_v)
|
---|
[3621] | 908 | && G.not_first
|
---|
| 909 | && n_bytes == G.bytes_per_block
|
---|
| 910 | && memcmp(prev_block, curr_block, G.bytes_per_block) == 0
|
---|
[1765] | 911 | ) {
|
---|
[3621] | 912 | if (G.prev_pair_equal) {
|
---|
[1765] | 913 | /* The two preceding blocks were equal, and the current
|
---|
| 914 | block is the same as the last one, so print nothing. */
|
---|
| 915 | } else {
|
---|
| 916 | puts("*");
|
---|
[3621] | 917 | G.prev_pair_equal = 1;
|
---|
[1765] | 918 | }
|
---|
| 919 | } else {
|
---|
[3621] | 920 | G.not_first = 1;
|
---|
| 921 | G.prev_pair_equal = 0;
|
---|
| 922 | for (i = 0; i < G.n_specs; i++) {
|
---|
[1765] | 923 | if (i == 0)
|
---|
[3621] | 924 | G.format_address(current_offset, '\0');
|
---|
[1765] | 925 | else
|
---|
| 926 | printf("%*s", address_pad_len_char - '0', "");
|
---|
[3621] | 927 | (*G.spec[i].print_function) (n_bytes, curr_block, G.spec[i].fmt_string);
|
---|
| 928 | if (G.spec[i].hexl_mode_trailer) {
|
---|
[1765] | 929 | /* space-pad out to full line width, then dump the trailer */
|
---|
[3621] | 930 | unsigned datum_width = width_bytes[G.spec[i].size];
|
---|
| 931 | unsigned blank_fields = (G.bytes_per_block - n_bytes) / datum_width;
|
---|
| 932 | unsigned field_width = G.spec[i].field_width + 1;
|
---|
[1765] | 933 | printf("%*s", blank_fields * field_width, "");
|
---|
| 934 | dump_hexl_mode_trailer(n_bytes, curr_block);
|
---|
| 935 | }
|
---|
| 936 | putchar('\n');
|
---|
| 937 | }
|
---|
| 938 | }
|
---|
| 939 | }
|
---|
| 940 |
|
---|
| 941 | static void
|
---|
| 942 | read_block(size_t n, char *block, size_t *n_bytes_in_buffer)
|
---|
| 943 | {
|
---|
[3621] | 944 | assert(0 < n && n <= G.bytes_per_block);
|
---|
[1765] | 945 |
|
---|
| 946 | *n_bytes_in_buffer = 0;
|
---|
| 947 |
|
---|
| 948 | if (n == 0)
|
---|
| 949 | return;
|
---|
| 950 |
|
---|
[3621] | 951 | while (G.in_stream != NULL) { /* EOF. */
|
---|
[1765] | 952 | size_t n_needed;
|
---|
| 953 | size_t n_read;
|
---|
| 954 |
|
---|
| 955 | n_needed = n - *n_bytes_in_buffer;
|
---|
[3621] | 956 | n_read = fread(block + *n_bytes_in_buffer, 1, n_needed, G.in_stream);
|
---|
[1765] | 957 | *n_bytes_in_buffer += n_read;
|
---|
| 958 | if (n_read == n_needed)
|
---|
| 959 | break;
|
---|
| 960 | /* error check is done in check_and_close */
|
---|
| 961 | check_and_close();
|
---|
| 962 | open_next_file();
|
---|
| 963 | }
|
---|
| 964 | }
|
---|
| 965 |
|
---|
| 966 | /* Return the least common multiple of the sizes associated
|
---|
| 967 | with the format specs. */
|
---|
| 968 |
|
---|
| 969 | static int
|
---|
| 970 | get_lcm(void)
|
---|
| 971 | {
|
---|
| 972 | size_t i;
|
---|
| 973 | int l_c_m = 1;
|
---|
| 974 |
|
---|
[3621] | 975 | for (i = 0; i < G.n_specs; i++)
|
---|
| 976 | l_c_m = lcm(l_c_m, width_bytes[(int) G.spec[i].size]);
|
---|
[1765] | 977 | return l_c_m;
|
---|
| 978 | }
|
---|
| 979 |
|
---|
| 980 | /* Read a chunk of size BYTES_PER_BLOCK from the input files, write the
|
---|
| 981 | formatted block to standard output, and repeat until the specified
|
---|
| 982 | maximum number of bytes has been read or until all input has been
|
---|
| 983 | processed. If the last block read is smaller than BYTES_PER_BLOCK
|
---|
| 984 | and its size is not a multiple of the size associated with a format
|
---|
| 985 | spec, extend the input block with zero bytes until its length is a
|
---|
| 986 | multiple of all format spec sizes. Write the final block. Finally,
|
---|
| 987 | write on a line by itself the offset of the byte after the last byte
|
---|
[2725] | 988 | read. */
|
---|
[1765] | 989 |
|
---|
| 990 | static void
|
---|
[2725] | 991 | dump(off_t current_offset, off_t end_offset)
|
---|
[1765] | 992 | {
|
---|
| 993 | char *block[2];
|
---|
| 994 | int idx;
|
---|
| 995 | size_t n_bytes_read;
|
---|
| 996 |
|
---|
[3621] | 997 | block[0] = xmalloc(2 * G.bytes_per_block);
|
---|
| 998 | block[1] = block[0] + G.bytes_per_block;
|
---|
[1765] | 999 |
|
---|
| 1000 | idx = 0;
|
---|
[3232] | 1001 | if (option_mask32 & OPT_N) {
|
---|
[1765] | 1002 | while (1) {
|
---|
| 1003 | size_t n_needed;
|
---|
| 1004 | if (current_offset >= end_offset) {
|
---|
| 1005 | n_bytes_read = 0;
|
---|
| 1006 | break;
|
---|
| 1007 | }
|
---|
[3621] | 1008 | n_needed = MIN(end_offset - current_offset, (off_t) G.bytes_per_block);
|
---|
[1765] | 1009 | read_block(n_needed, block[idx], &n_bytes_read);
|
---|
[3621] | 1010 | if (n_bytes_read < G.bytes_per_block)
|
---|
[1765] | 1011 | break;
|
---|
[3621] | 1012 | assert(n_bytes_read == G.bytes_per_block);
|
---|
[3232] | 1013 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]);
|
---|
[1765] | 1014 | current_offset += n_bytes_read;
|
---|
[3232] | 1015 | idx ^= 1;
|
---|
[1765] | 1016 | }
|
---|
| 1017 | } else {
|
---|
| 1018 | while (1) {
|
---|
[3621] | 1019 | read_block(G.bytes_per_block, block[idx], &n_bytes_read);
|
---|
| 1020 | if (n_bytes_read < G.bytes_per_block)
|
---|
[1765] | 1021 | break;
|
---|
[3621] | 1022 | assert(n_bytes_read == G.bytes_per_block);
|
---|
[3232] | 1023 | write_block(current_offset, n_bytes_read, block[idx ^ 1], block[idx]);
|
---|
[1765] | 1024 | current_offset += n_bytes_read;
|
---|
[3232] | 1025 | idx ^= 1;
|
---|
[1765] | 1026 | }
|
---|
| 1027 | }
|
---|
| 1028 |
|
---|
| 1029 | if (n_bytes_read > 0) {
|
---|
| 1030 | int l_c_m;
|
---|
| 1031 | size_t bytes_to_write;
|
---|
| 1032 |
|
---|
| 1033 | l_c_m = get_lcm();
|
---|
| 1034 |
|
---|
| 1035 | /* Make bytes_to_write the smallest multiple of l_c_m that
|
---|
[3232] | 1036 | is at least as large as n_bytes_read. */
|
---|
[1765] | 1037 | bytes_to_write = l_c_m * ((n_bytes_read + l_c_m - 1) / l_c_m);
|
---|
| 1038 |
|
---|
| 1039 | memset(block[idx] + n_bytes_read, 0, bytes_to_write - n_bytes_read);
|
---|
| 1040 | write_block(current_offset, bytes_to_write,
|
---|
[3232] | 1041 | block[idx ^ 1], block[idx]);
|
---|
[1765] | 1042 | current_offset += n_bytes_read;
|
---|
| 1043 | }
|
---|
| 1044 |
|
---|
[3621] | 1045 | G.format_address(current_offset, '\n');
|
---|
[1765] | 1046 |
|
---|
[3232] | 1047 | if ((option_mask32 & OPT_N) && current_offset >= end_offset)
|
---|
[1765] | 1048 | check_and_close();
|
---|
| 1049 |
|
---|
| 1050 | free(block[0]);
|
---|
| 1051 | }
|
---|
| 1052 |
|
---|
| 1053 | /* Read N bytes into BLOCK from the concatenation of the input files
|
---|
| 1054 | named in the global array FILE_LIST. On the first call to this
|
---|
| 1055 | function, the global variable IN_STREAM is expected to be an open
|
---|
| 1056 | stream associated with the input file INPUT_FILENAME. If all N
|
---|
| 1057 | bytes cannot be read from IN_STREAM, close IN_STREAM and update
|
---|
| 1058 | the global variables IN_STREAM and INPUT_FILENAME. Then try to
|
---|
| 1059 | read the remaining bytes from the newly opened file. Repeat if
|
---|
| 1060 | necessary until EOF is reached for the last file in FILE_LIST.
|
---|
| 1061 | On subsequent calls, don't modify BLOCK and return zero. Set
|
---|
| 1062 | *N_BYTES_IN_BUFFER to the number of bytes read. If an error occurs,
|
---|
| 1063 | it will be detected through ferror when the stream is about to be
|
---|
| 1064 | closed. If there is an error, give a message but continue reading
|
---|
| 1065 | as usual and return nonzero. Otherwise return zero. */
|
---|
| 1066 |
|
---|
| 1067 | /* STRINGS mode. Find each "string constant" in the input.
|
---|
| 1068 | A string constant is a run of at least 'string_min' ASCII
|
---|
| 1069 | graphic (or formatting) characters terminated by a null.
|
---|
| 1070 | Based on a function written by Richard Stallman for a
|
---|
[2725] | 1071 | traditional version of od. */
|
---|
[1765] | 1072 |
|
---|
| 1073 | static void
|
---|
[2725] | 1074 | dump_strings(off_t address, off_t end_offset)
|
---|
[1765] | 1075 | {
|
---|
[3621] | 1076 | unsigned bufsize = MAX(100, G.string_min);
|
---|
[3232] | 1077 | unsigned char *buf = xmalloc(bufsize);
|
---|
[1765] | 1078 |
|
---|
| 1079 | while (1) {
|
---|
| 1080 | size_t i;
|
---|
| 1081 | int c;
|
---|
| 1082 |
|
---|
[3621] | 1083 | /* See if the next 'G.string_min' chars are all printing chars. */
|
---|
[1765] | 1084 | tryline:
|
---|
[3621] | 1085 | if ((option_mask32 & OPT_N) && (end_offset - G.string_min <= address))
|
---|
[1765] | 1086 | break;
|
---|
| 1087 | i = 0;
|
---|
[3232] | 1088 | while (!(option_mask32 & OPT_N) || address < end_offset) {
|
---|
[1765] | 1089 | if (i == bufsize) {
|
---|
| 1090 | bufsize += bufsize/8;
|
---|
| 1091 | buf = xrealloc(buf, bufsize);
|
---|
| 1092 | }
|
---|
[3232] | 1093 |
|
---|
[3621] | 1094 | while (G.in_stream) { /* !EOF */
|
---|
| 1095 | c = fgetc(G.in_stream);
|
---|
[3232] | 1096 | if (c != EOF)
|
---|
| 1097 | goto got_char;
|
---|
| 1098 | check_and_close();
|
---|
| 1099 | open_next_file();
|
---|
[1765] | 1100 | }
|
---|
[3232] | 1101 | /* EOF */
|
---|
| 1102 | goto ret;
|
---|
| 1103 | got_char:
|
---|
[1765] | 1104 | address++;
|
---|
| 1105 | if (!c)
|
---|
| 1106 | break;
|
---|
| 1107 | if (!ISPRINT(c))
|
---|
| 1108 | goto tryline; /* It isn't; give up on this string. */
|
---|
| 1109 | buf[i++] = c; /* String continues; store it all. */
|
---|
| 1110 | }
|
---|
| 1111 |
|
---|
[3621] | 1112 | if (i < G.string_min) /* Too short! */
|
---|
[1765] | 1113 | goto tryline;
|
---|
| 1114 |
|
---|
[3232] | 1115 | /* If we get here, the string is all printable and NUL-terminated */
|
---|
[1765] | 1116 | buf[i] = 0;
|
---|
[3621] | 1117 | G.format_address(address - i - 1, ' ');
|
---|
[1765] | 1118 |
|
---|
| 1119 | for (i = 0; (c = buf[i]); i++) {
|
---|
| 1120 | switch (c) {
|
---|
| 1121 | case '\007': fputs("\\a", stdout); break;
|
---|
| 1122 | case '\b': fputs("\\b", stdout); break;
|
---|
| 1123 | case '\f': fputs("\\f", stdout); break;
|
---|
| 1124 | case '\n': fputs("\\n", stdout); break;
|
---|
| 1125 | case '\r': fputs("\\r", stdout); break;
|
---|
| 1126 | case '\t': fputs("\\t", stdout); break;
|
---|
| 1127 | case '\v': fputs("\\v", stdout); break;
|
---|
[2725] | 1128 | default: putchar(c);
|
---|
[1765] | 1129 | }
|
---|
| 1130 | }
|
---|
| 1131 | putchar('\n');
|
---|
| 1132 | }
|
---|
| 1133 |
|
---|
| 1134 | /* We reach this point only if we search through
|
---|
[3621] | 1135 | (max_bytes_to_format - G.string_min) bytes before reaching EOF. */
|
---|
[3232] | 1136 | check_and_close();
|
---|
| 1137 | ret:
|
---|
[1765] | 1138 | free(buf);
|
---|
[3232] | 1139 | }
|
---|
[1765] | 1140 |
|
---|
[3232] | 1141 | #if ENABLE_LONG_OPTS
|
---|
| 1142 | /* If S is a valid traditional offset specification with an optional
|
---|
| 1143 | leading '+' return nonzero and set *OFFSET to the offset it denotes. */
|
---|
| 1144 |
|
---|
| 1145 | static int
|
---|
| 1146 | parse_old_offset(const char *s, off_t *offset)
|
---|
| 1147 | {
|
---|
| 1148 | static const struct suffix_mult Bb[] = {
|
---|
| 1149 | { "B", 1024 },
|
---|
| 1150 | { "b", 512 },
|
---|
| 1151 | { "", 0 }
|
---|
| 1152 | };
|
---|
| 1153 | char *p;
|
---|
| 1154 | int radix;
|
---|
| 1155 |
|
---|
| 1156 | /* Skip over any leading '+'. */
|
---|
| 1157 | if (s[0] == '+') ++s;
|
---|
| 1158 | if (!isdigit(s[0])) return 0; /* not a number */
|
---|
| 1159 |
|
---|
| 1160 | /* Determine the radix we'll use to interpret S. If there is a '.',
|
---|
| 1161 | * it's decimal, otherwise, if the string begins with '0X'or '0x',
|
---|
| 1162 | * it's hexadecimal, else octal. */
|
---|
| 1163 | p = strchr(s, '.');
|
---|
| 1164 | radix = 8;
|
---|
| 1165 | if (p) {
|
---|
| 1166 | p[0] = '\0'; /* cheating */
|
---|
| 1167 | radix = 10;
|
---|
| 1168 | } else if (s[0] == '0' && (s[1] == 'x' || s[1] == 'X'))
|
---|
| 1169 | radix = 16;
|
---|
| 1170 |
|
---|
| 1171 | *offset = xstrtooff_sfx(s, radix, Bb);
|
---|
| 1172 | if (p) p[0] = '.';
|
---|
| 1173 |
|
---|
| 1174 | return (*offset >= 0);
|
---|
[1765] | 1175 | }
|
---|
[3232] | 1176 | #endif
|
---|
[1765] | 1177 |
|
---|
[2725] | 1178 | int od_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
[3232] | 1179 | int od_main(int argc UNUSED_PARAM, char **argv)
|
---|
[1765] | 1180 | {
|
---|
[2725] | 1181 | #if ENABLE_LONG_OPTS
|
---|
[1765] | 1182 | static const char od_longopts[] ALIGN1 =
|
---|
| 1183 | "skip-bytes\0" Required_argument "j"
|
---|
| 1184 | "address-radix\0" Required_argument "A"
|
---|
| 1185 | "read-bytes\0" Required_argument "N"
|
---|
| 1186 | "format\0" Required_argument "t"
|
---|
| 1187 | "output-duplicates\0" No_argument "v"
|
---|
[3232] | 1188 | /* Yes, it's true: -S NUM, but --strings[=NUM]!
|
---|
| 1189 | * that is, NUM is mandatory for -S but optional for --strings!
|
---|
| 1190 | */
|
---|
[1765] | 1191 | "strings\0" Optional_argument "S"
|
---|
| 1192 | "width\0" Optional_argument "w"
|
---|
| 1193 | "traditional\0" No_argument "\xff"
|
---|
| 1194 | ;
|
---|
| 1195 | #endif
|
---|
[3232] | 1196 | const char *str_A, *str_N, *str_j, *str_S = "3";
|
---|
[1765] | 1197 | llist_t *lst_t = NULL;
|
---|
[2725] | 1198 | unsigned opt;
|
---|
| 1199 | int l_c_m;
|
---|
| 1200 | /* The number of input bytes to skip before formatting and writing. */
|
---|
| 1201 | off_t n_bytes_to_skip = 0;
|
---|
| 1202 | /* The offset of the first byte after the last byte to be formatted. */
|
---|
| 1203 | off_t end_offset = 0;
|
---|
| 1204 | /* The maximum number of bytes that will be formatted. */
|
---|
| 1205 | off_t max_bytes_to_format = 0;
|
---|
[1765] | 1206 |
|
---|
[3621] | 1207 | INIT_G();
|
---|
| 1208 |
|
---|
| 1209 | /*G.spec = NULL; - already is */
|
---|
| 1210 | G.format_address = format_address_std;
|
---|
[1765] | 1211 | address_base_char = 'o';
|
---|
| 1212 | address_pad_len_char = '7';
|
---|
| 1213 |
|
---|
| 1214 | /* Parse command line */
|
---|
[2725] | 1215 | opt_complementary = "w+:t::"; /* -w N, -t is a list */
|
---|
| 1216 | #if ENABLE_LONG_OPTS
|
---|
[1765] | 1217 | applet_long_options = od_longopts;
|
---|
| 1218 | #endif
|
---|
[3232] | 1219 | opt = OD_GETOPT32();
|
---|
[1765] | 1220 | argv += optind;
|
---|
| 1221 | if (opt & OPT_A) {
|
---|
| 1222 | static const char doxn[] ALIGN1 = "doxn";
|
---|
| 1223 | static const char doxn_address_base_char[] ALIGN1 = {
|
---|
| 1224 | 'u', 'o', 'x', /* '?' fourth one is not important */
|
---|
| 1225 | };
|
---|
| 1226 | static const uint8_t doxn_address_pad_len_char[] ALIGN1 = {
|
---|
| 1227 | '7', '7', '6', /* '?' */
|
---|
| 1228 | };
|
---|
| 1229 | char *p;
|
---|
| 1230 | int pos;
|
---|
| 1231 | p = strchr(doxn, str_A[0]);
|
---|
| 1232 | if (!p)
|
---|
| 1233 | bb_error_msg_and_die("bad output address radix "
|
---|
| 1234 | "'%c' (must be [doxn])", str_A[0]);
|
---|
| 1235 | pos = p - doxn;
|
---|
[3621] | 1236 | if (pos == 3) G.format_address = format_address_none;
|
---|
[1765] | 1237 | address_base_char = doxn_address_base_char[pos];
|
---|
| 1238 | address_pad_len_char = doxn_address_pad_len_char[pos];
|
---|
| 1239 | }
|
---|
| 1240 | if (opt & OPT_N) {
|
---|
[3621] | 1241 | max_bytes_to_format = xstrtooff_sfx(str_N, 0, bkm_suffixes);
|
---|
[1765] | 1242 | }
|
---|
| 1243 | if (opt & OPT_a) decode_format_string("a");
|
---|
| 1244 | if (opt & OPT_b) decode_format_string("oC");
|
---|
| 1245 | if (opt & OPT_c) decode_format_string("c");
|
---|
| 1246 | if (opt & OPT_d) decode_format_string("u2");
|
---|
| 1247 | if (opt & OPT_f) decode_format_string("fF");
|
---|
| 1248 | if (opt & OPT_h) decode_format_string("x2");
|
---|
| 1249 | if (opt & OPT_i) decode_format_string("d2");
|
---|
[3621] | 1250 | if (opt & OPT_j) n_bytes_to_skip = xstrtooff_sfx(str_j, 0, bkm_suffixes);
|
---|
[1765] | 1251 | if (opt & OPT_l) decode_format_string("d4");
|
---|
| 1252 | if (opt & OPT_o) decode_format_string("o2");
|
---|
| 1253 | while (lst_t) {
|
---|
[2725] | 1254 | decode_format_string(llist_pop(&lst_t));
|
---|
[1765] | 1255 | }
|
---|
| 1256 | if (opt & OPT_x) decode_format_string("x2");
|
---|
| 1257 | if (opt & OPT_s) decode_format_string("d2");
|
---|
| 1258 | if (opt & OPT_S) {
|
---|
[3621] | 1259 | G.string_min = xstrtou_sfx(str_S, 0, bkm_suffixes);
|
---|
[1765] | 1260 | }
|
---|
| 1261 |
|
---|
[3232] | 1262 | // Bloat:
|
---|
[3621] | 1263 | //if ((option_mask32 & OPT_S) && G.n_specs > 0)
|
---|
[3232] | 1264 | // bb_error_msg_and_die("no type may be specified when dumping strings");
|
---|
[1765] | 1265 |
|
---|
| 1266 | /* If the --traditional option is used, there may be from
|
---|
| 1267 | * 0 to 3 remaining command line arguments; handle each case
|
---|
| 1268 | * separately.
|
---|
[3232] | 1269 | * od [FILE] [[+]OFFSET[.][b] [[+]LABEL[.][b]]]
|
---|
[1765] | 1270 | * The offset and pseudo_start have the same syntax.
|
---|
| 1271 | *
|
---|
| 1272 | * FIXME: POSIX 1003.1-2001 with XSI requires support for the
|
---|
| 1273 | * traditional syntax even if --traditional is not given. */
|
---|
| 1274 |
|
---|
[2725] | 1275 | #if ENABLE_LONG_OPTS
|
---|
[1765] | 1276 | if (opt & OPT_traditional) {
|
---|
[3232] | 1277 | if (argv[0]) {
|
---|
| 1278 | off_t pseudo_start = -1;
|
---|
| 1279 | off_t o1, o2;
|
---|
[1765] | 1280 |
|
---|
[3232] | 1281 | if (!argv[1]) { /* one arg */
|
---|
| 1282 | if (parse_old_offset(argv[0], &o1)) {
|
---|
| 1283 | /* od --traditional OFFSET */
|
---|
| 1284 | n_bytes_to_skip = o1;
|
---|
| 1285 | argv++;
|
---|
| 1286 | }
|
---|
| 1287 | /* od --traditional FILE */
|
---|
| 1288 | } else if (!argv[2]) { /* two args */
|
---|
| 1289 | if (parse_old_offset(argv[0], &o1)
|
---|
| 1290 | && parse_old_offset(argv[1], &o2)
|
---|
| 1291 | ) {
|
---|
| 1292 | /* od --traditional OFFSET LABEL */
|
---|
| 1293 | n_bytes_to_skip = o1;
|
---|
| 1294 | pseudo_start = o2;
|
---|
| 1295 | argv += 2;
|
---|
| 1296 | } else if (parse_old_offset(argv[1], &o2)) {
|
---|
| 1297 | /* od --traditional FILE OFFSET */
|
---|
| 1298 | n_bytes_to_skip = o2;
|
---|
| 1299 | argv[1] = NULL;
|
---|
| 1300 | } else {
|
---|
| 1301 | bb_error_msg_and_die("invalid second argument '%s'", argv[1]);
|
---|
| 1302 | }
|
---|
| 1303 | } else if (!argv[3]) { /* three args */
|
---|
| 1304 | if (parse_old_offset(argv[1], &o1)
|
---|
| 1305 | && parse_old_offset(argv[2], &o2)
|
---|
| 1306 | ) {
|
---|
| 1307 | /* od --traditional FILE OFFSET LABEL */
|
---|
| 1308 | n_bytes_to_skip = o1;
|
---|
| 1309 | pseudo_start = o2;
|
---|
| 1310 | argv[1] = NULL;
|
---|
| 1311 | } else {
|
---|
| 1312 | bb_error_msg_and_die("the last two arguments must be offsets");
|
---|
| 1313 | }
|
---|
| 1314 | } else { /* >3 args */
|
---|
| 1315 | bb_error_msg_and_die("too many arguments");
|
---|
[1765] | 1316 | }
|
---|
[3232] | 1317 |
|
---|
| 1318 | if (pseudo_start >= 0) {
|
---|
[3621] | 1319 | if (G.format_address == format_address_none) {
|
---|
[3232] | 1320 | address_base_char = 'o';
|
---|
| 1321 | address_pad_len_char = '7';
|
---|
[3621] | 1322 | G.format_address = format_address_paren;
|
---|
[3232] | 1323 | } else {
|
---|
[3621] | 1324 | G.format_address = format_address_label;
|
---|
[3232] | 1325 | }
|
---|
[3621] | 1326 | G_pseudo_offset = pseudo_start - n_bytes_to_skip;
|
---|
[1765] | 1327 | }
|
---|
| 1328 | }
|
---|
[3232] | 1329 | /* else: od --traditional (without args) */
|
---|
[1765] | 1330 | }
|
---|
| 1331 | #endif
|
---|
| 1332 |
|
---|
[3232] | 1333 | if (option_mask32 & OPT_N) {
|
---|
[1765] | 1334 | end_offset = n_bytes_to_skip + max_bytes_to_format;
|
---|
| 1335 | if (end_offset < n_bytes_to_skip)
|
---|
[3232] | 1336 | bb_error_msg_and_die("SKIP + SIZE is too large");
|
---|
[1765] | 1337 | }
|
---|
| 1338 |
|
---|
[3621] | 1339 | if (G.n_specs == 0) {
|
---|
[1765] | 1340 | decode_format_string("o2");
|
---|
[3621] | 1341 | /*G.n_specs = 1; - done by decode_format_string */
|
---|
[1765] | 1342 | }
|
---|
| 1343 |
|
---|
| 1344 | /* If no files were listed on the command line,
|
---|
| 1345 | set the global pointer FILE_LIST so that it
|
---|
| 1346 | references the null-terminated list of one name: "-". */
|
---|
[3621] | 1347 | G.file_list = bb_argv_dash;
|
---|
[3232] | 1348 | if (argv[0]) {
|
---|
[1765] | 1349 | /* Set the global pointer FILE_LIST so that it
|
---|
| 1350 | references the first file-argument on the command-line. */
|
---|
[3621] | 1351 | G.file_list = (char const *const *) argv;
|
---|
[1765] | 1352 | }
|
---|
| 1353 |
|
---|
[3232] | 1354 | /* Open the first input file */
|
---|
[1765] | 1355 | open_next_file();
|
---|
[3232] | 1356 | /* Skip over any unwanted header bytes */
|
---|
[1765] | 1357 | skip(n_bytes_to_skip);
|
---|
[3621] | 1358 | if (!G.in_stream)
|
---|
[2725] | 1359 | return EXIT_FAILURE;
|
---|
[1765] | 1360 |
|
---|
[3232] | 1361 | /* Compute output block length */
|
---|
[1765] | 1362 | l_c_m = get_lcm();
|
---|
| 1363 |
|
---|
| 1364 | if (opt & OPT_w) { /* -w: width */
|
---|
[3621] | 1365 | if (!G.bytes_per_block || G.bytes_per_block % l_c_m != 0) {
|
---|
[2725] | 1366 | bb_error_msg("warning: invalid width %u; using %d instead",
|
---|
[3621] | 1367 | (unsigned)G.bytes_per_block, l_c_m);
|
---|
| 1368 | G.bytes_per_block = l_c_m;
|
---|
[1765] | 1369 | }
|
---|
| 1370 | } else {
|
---|
[3621] | 1371 | G.bytes_per_block = l_c_m;
|
---|
[1765] | 1372 | if (l_c_m < DEFAULT_BYTES_PER_BLOCK)
|
---|
[3621] | 1373 | G.bytes_per_block *= DEFAULT_BYTES_PER_BLOCK / l_c_m;
|
---|
[1765] | 1374 | }
|
---|
| 1375 |
|
---|
| 1376 | #ifdef DEBUG
|
---|
[3621] | 1377 | for (i = 0; i < G.n_specs; i++) {
|
---|
[1765] | 1378 | printf("%d: fmt=\"%s\" width=%d\n",
|
---|
| 1379 | i, spec[i].fmt_string, width_bytes[spec[i].size]);
|
---|
| 1380 | }
|
---|
| 1381 | #endif
|
---|
| 1382 |
|
---|
[3232] | 1383 | if (option_mask32 & OPT_S)
|
---|
[2725] | 1384 | dump_strings(n_bytes_to_skip, end_offset);
|
---|
[1765] | 1385 | else
|
---|
[2725] | 1386 | dump(n_bytes_to_skip, end_offset);
|
---|
[1765] | 1387 |
|
---|
[3232] | 1388 | if (fclose(stdin))
|
---|
[1765] | 1389 | bb_perror_msg_and_die(bb_msg_standard_input);
|
---|
| 1390 |
|
---|
[3621] | 1391 | return G.exit_code;
|
---|
[1765] | 1392 | }
|
---|