| 1 | /* $Id: md5sum.c 1101 2007-09-22 22:01:37Z bird $ */
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| 2 | /** @file
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| 3 | * md5sum.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
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| 8 | *
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| 9 | * This file is part of kBuild.
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| 10 | *
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| 11 | * kBuild is free software; you can redistribute it and/or modify
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| 12 | * it under the terms of the GNU General Public License as published by
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| 13 | * the Free Software Foundation; either version 2 of the License, or
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| 14 | * (at your option) any later version.
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| 15 | *
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| 16 | * kBuild is distributed in the hope that it will be useful,
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| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 19 | * GNU General Public License for more details.
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| 20 | *
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| 21 | * You should have received a copy of the GNU General Public License
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| 22 | * along with kBuild; if not, write to the Free Software
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| 23 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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| 24 | *
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| 25 | */
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| 26 |
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| 27 | #include <string.h>
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| 28 | #include <stdio.h>
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| 29 | #include <errno.h>
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| 30 | #include "err.h"
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| 31 | #include "kmkbuiltin.h"
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| 32 | #include "../../lib/md5.h"
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| 33 |
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| 34 |
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| 35 |
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| 36 | /**
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| 37 | * Prints the usage and return 1.
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| 38 | */
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| 39 | static int usage(void)
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| 40 | {
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| 41 | fprintf(stderr,
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| 42 | "usage: md5sum [-bt] file [string ...]\n"
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| 43 | " or: md5sum [-cbtwq] file\n");
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| 44 | return 1;
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| 45 | }
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| 46 |
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| 47 |
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| 48 | /**
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| 49 | * Prints the version string.
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| 50 | * @returns 0
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| 51 | */
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| 52 | static int version(void)
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| 53 | {
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| 54 | #ifdef kmk_builtin_md5sum
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| 55 | fprintf(stdout, "kmk_md5sum (kBuild) %d.%d.%d\n"
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| 56 | "Copyright (c) 2007 knut st. osmundsen\n",
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| 57 | KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH);
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| 58 | #else
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| 59 | fprintf(stdout, "kmk_builtin_md5sum (kBuild) %d.%d.%d\n"
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| 60 | "Copyright (c) 2007 knut st. osmundsen\n",
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| 61 | KBUILD_VERSION_MAJOR, KBUILD_VERSION_MINOR, KBUILD_VERSION_PATCH);
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| 62 | #endif
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| 63 | return 0;
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| 64 | }
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| 65 |
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| 66 |
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| 67 | /**
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| 68 | * Makes a string out of the given digest.
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| 69 | *
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| 70 | * @param pDigest The MD5 digest.
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| 71 | * @param pszDigest Where to put the digest string. Must be able to
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| 72 | * hold at least 33 bytes.
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| 73 | */
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| 74 | static void digest_to_string(unsigned char pDigest[16], char *pszDigest)
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| 75 | {
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| 76 | unsigned i;
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| 77 | for (i = 0; i < 16; i++)
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| 78 | {
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| 79 | static char s_achDigits[17] = "0123456789abcdef";
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| 80 | pszDigest[i*2] = s_achDigits[(pDigest[i] >> 4)];
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| 81 | pszDigest[i*2 + 1] = s_achDigits[(pDigest[i] & 0xf)];
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| 82 | }
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| 83 | pszDigest[i*2] = '\0';
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| 84 | }
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| 85 |
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| 86 |
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| 87 | /**
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| 88 | * Attempts to convert a string to a MD5 digest.
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| 89 | *
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| 90 | * @returns 0 on success, 1-based position of the failure first error.
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| 91 | * @param pszDigest The string to interpret.
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| 92 | * @param pDigest Where to put the MD5 digest.
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| 93 | */
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| 94 | static int string_to_digest(const char *pszDigest, unsigned char pDigest[16])
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| 95 | {
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| 96 | unsigned i;
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| 97 | unsigned iBase = 1;
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| 98 |
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| 99 | /* skip blanks */
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| 100 | while ( *pszDigest == ' '
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| 101 | || *pszDigest == '\t'
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| 102 | || *pszDigest == '\n'
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| 103 | || *pszDigest == '\r')
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| 104 | pszDigest++, iBase++;
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| 105 |
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| 106 | /* convert the digits. */
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| 107 | memset(pDigest, 0, 16);
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| 108 | for (i = 0; i < 32; i++, pszDigest++)
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| 109 | {
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| 110 | int iDigit;
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| 111 | if (*pszDigest >= '0' && *pszDigest <= '9')
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| 112 | iDigit = *pszDigest - '0';
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| 113 | else if (*pszDigest >= 'a' && *pszDigest <= 'f')
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| 114 | iDigit = *pszDigest - 'a' + 10;
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| 115 | else if (*pszDigest >= 'A' && *pszDigest <= 'F')
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| 116 | iDigit = *pszDigest - 'A' + 10;
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| 117 | else
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| 118 | return i + iBase;
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| 119 | if (i & 1)
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| 120 | pDigest[i >> 1] |= iDigit;
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| 121 | else
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| 122 | pDigest[i >> 1] |= iDigit << 4;
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| 123 | }
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| 124 |
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| 125 | /* the rest of the string must now be blanks. */
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| 126 | while ( *pszDigest == ' '
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| 127 | || *pszDigest == '\t'
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| 128 | || *pszDigest == '\n'
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| 129 | || *pszDigest == '\r')
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| 130 | pszDigest++, i++;
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| 131 |
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| 132 | return *pszDigest ? i + iBase : 0;
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| 133 | }
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| 134 |
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| 135 |
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| 136 | /**
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| 137 | * Calculates the md5sum of the sepecified file stream.
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| 138 | *
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| 139 | * @returns errno on failure, 0 on success.
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| 140 | * @param pFile The file stream.
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| 141 | * @param pDigest Where to store the MD5 digest.
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| 142 | */
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| 143 | static int calc_md5sum(FILE *pFile, unsigned char pDigest[16])
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| 144 | {
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| 145 | int rc = 0;
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| 146 | int cb;
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| 147 | char abBuf[16384];
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| 148 | struct MD5Context Ctx;
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| 149 |
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| 150 | MD5Init(&Ctx);
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| 151 | for (;;)
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| 152 | {
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| 153 | errno = 0;
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| 154 | cb = (int)fread(abBuf, 1, sizeof(abBuf), pFile);
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| 155 | if (cb > 0)
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| 156 | MD5Update(&Ctx, abBuf, cb);
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| 157 | else if (cb == 0)
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| 158 | break;
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| 159 | else
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| 160 | {
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| 161 | rc = errno;
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| 162 | if (!rc)
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| 163 | rc = EINVAL;
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| 164 | break;
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| 165 | }
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| 166 | }
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| 167 | MD5Final(pDigest, &Ctx);
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| 168 |
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| 169 | return rc;
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| 170 | }
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| 171 |
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| 172 |
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| 173 | /**
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| 174 | * Checks the if the specified digest matches the digest of the file stream.
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| 175 | *
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| 176 | * @returns 0 on match, -1 on mismatch, errno value (positive) on failure.
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| 177 | * @param pFile The file stream.
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| 178 | * @param Digest The MD5 digest.
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| 179 | */
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| 180 | static int check_md5sum(FILE *pFile, unsigned char Digest[16])
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| 181 | {
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| 182 | unsigned char DigestFile[16];
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| 183 | int rc;
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| 184 |
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| 185 | rc = calc_md5sum(pFile, DigestFile);
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| 186 | if (!rc)
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| 187 | rc = memcmp(Digest, DigestFile, 16) ? -1 : 0;
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| 188 | return rc;
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| 189 | }
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| 190 |
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| 191 |
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| 192 | /**
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| 193 | * Opens the specified file for md5 sum calculation.
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| 194 | *
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| 195 | * @returns File stream on success, NULL and errno on failure.
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| 196 | * @param pszFilename The filename.
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| 197 | * @param fText Whether text or binary mode should be used.
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| 198 | */
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| 199 | static FILE *open_file(const char *pszFilename, unsigned fText)
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| 200 | {
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| 201 | FILE *pFile;
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| 202 |
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| 203 | errno = 0;
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| 204 | pFile = fopen(pszFilename, fText ? "r" : "rb");
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| 205 | if (!pFile && errno == EINVAL && !fText)
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| 206 | pFile = fopen(pszFilename, "r");
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| 207 | return pFile;
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| 208 | }
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| 209 |
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| 210 |
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| 211 | /**
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| 212 | * md5sum, calculates and checks the md5sum of files.
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| 213 | * Somewhat similar to the GNU coreutil md5sum command.
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| 214 | */
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| 215 | int kmk_builtin_md5sum(int argc, char **argv, char **envp)
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| 216 | {
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| 217 | int i;
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| 218 | int rc = 0;
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| 219 | int fText = 0;
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| 220 | int fBinaryTextOpt = 0;
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| 221 | int fQuiet = 0;
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| 222 | int fNewLine = 0;
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| 223 | int fChecking = 0;
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| 224 | int fNoMoreOptions = 0;
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| 225 | unsigned char Digest[16];
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| 226 | const char *pszFilename;
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| 227 | const char *pszDigest;
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| 228 | char szDigest[36];
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| 229 | FILE *pFile;
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| 230 | int rc2;
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| 231 |
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| 232 | g_progname = argv[0];
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| 233 |
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| 234 | /*
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| 235 | * Print usage if no arguments.
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| 236 | */
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| 237 | if (argc <= 1)
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| 238 | return usage();
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| 239 |
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| 240 | /*
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| 241 | * Process the arguments, FIFO style.
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| 242 | */
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| 243 | i = 1;
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| 244 | while (i < argc)
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| 245 | {
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| 246 | char *psz = argv[i];
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| 247 | if (!fNoMoreOptions && psz[0] == '-' && psz[1] == '-' && !psz[2])
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| 248 | fNoMoreOptions = 1;
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| 249 | else if (*psz == '-' && !fNoMoreOptions)
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| 250 | {
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| 251 | psz++;
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| 252 | /* convert long options for gnu just for fun */
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| 253 | if (*psz == '-')
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| 254 | {
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| 255 | if (!strcmp(psz, "-binary"))
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| 256 | psz = "b";
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| 257 | else if (!strcmp(psz, "-text"))
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| 258 | psz = "t";
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| 259 | else if (!strcmp(psz, "-check"))
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| 260 | psz = "c";
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| 261 | else if (!strcmp(psz, "-check-this"))
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| 262 | psz = "C";
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| 263 | else if (!strcmp(psz, "-status"))
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| 264 | psz = "q";
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| 265 | else if (!strcmp(psz, "-warn"))
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| 266 | psz = "w";
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| 267 | else if (!strcmp(psz, "-help"))
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| 268 | psz = "h";
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| 269 | else if (!strcmp(psz, "-version"))
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| 270 | psz = "v";
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| 271 | }
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| 272 |
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| 273 | /* short options */
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| 274 | do
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| 275 | {
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| 276 | switch (*psz)
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| 277 | {
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| 278 | case 'c':
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| 279 | fChecking = 1;
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| 280 | break;
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| 281 |
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| 282 | case 'b':
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| 283 | fText = 0;
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| 284 | fBinaryTextOpt = 1;
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| 285 | break;
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| 286 |
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| 287 | case 't':
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| 288 | fText = 1;
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| 289 | fBinaryTextOpt = 1;
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| 290 | break;
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| 291 |
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| 292 | case 'q':
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| 293 | fQuiet = 1;
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| 294 | break;
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| 295 |
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| 296 | case 'w':
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| 297 | /* ignored */
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| 298 | break;
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| 299 |
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| 300 | case 'v':
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| 301 | return version();
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| 302 |
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| 303 | /*
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| 304 | * -C md5 file
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| 305 | */
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| 306 | case 'C':
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| 307 | {
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| 308 | if (psz[1])
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| 309 | pszDigest = &psz[1];
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| 310 | else if (i + 1 < argc)
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| 311 | pszDigest = argv[++i];
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| 312 | else
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| 313 | {
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| 314 | errx(1, "'-C' is missing the MD5 sum!");
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| 315 | return 1;
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| 316 | }
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| 317 | rc2 = string_to_digest(pszDigest, Digest);
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| 318 | if (rc2)
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| 319 | {
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| 320 | errx(1, "Malformed MD5 digest '%s'!", pszDigest);
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| 321 | errx(1, " %*s^", rc2 - 1, "");
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| 322 | return 1;
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| 323 | }
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| 324 |
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| 325 | if (i + 1 < argc)
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| 326 | pszFilename = argv[++i];
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| 327 | else
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| 328 | {
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| 329 | errx(1, "'-C' is missing the filename!");
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| 330 | return 1;
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| 331 | }
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| 332 | pFile = open_file(pszFilename, fText);
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| 333 | if (pFile)
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| 334 | {
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| 335 | rc2 = check_md5sum(pFile, Digest);
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| 336 | if (!fQuiet)
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| 337 | {
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| 338 | if (rc2 <= 0)
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| 339 | {
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| 340 | fprintf(stdout, "%s: %s\n", pszFilename, !rc2 ? "OK" : "FAILURE");
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| 341 | fflush(stdout);
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| 342 | }
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| 343 | else
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| 344 | errx(1, "Error reading '%s': %s", pszFilename, strerror(rc));
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| 345 | }
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| 346 | if (rc2)
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| 347 | rc = 1;
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| 348 | fclose(pFile);
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| 349 | }
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| 350 | else
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| 351 | {
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| 352 | if (!fQuiet)
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| 353 | errx(1, "Failed to open '%s': %s", pszFilename, strerror(errno));
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| 354 | rc = 1;
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| 355 | }
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| 356 | psz = "\0";
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| 357 | break;
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| 358 | }
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| 359 |
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| 360 | default:
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| 361 | errx(1, "Invalid option '%c'! (%s)", *psz, argv[i]);
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| 362 | return usage();
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| 363 | }
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| 364 | } while (*++psz);
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| 365 | }
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| 366 | else if (fChecking)
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| 367 | {
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| 368 | pFile = fopen(argv[i], "r");
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| 369 | if (pFile)
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| 370 | {
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| 371 | int iLine = 0;
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| 372 | char szLine[8192];
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| 373 | while (fgets(szLine, sizeof(szLine), pFile))
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| 374 | {
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| 375 | int fLineText;
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| 376 | char *psz = szLine;
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| 377 | iLine++;
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| 378 |
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| 379 | /* leading blanks */
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| 380 | while (*psz == ' ' || *psz == '\t' || *psz == '\n')
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| 381 | psz++;
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| 382 |
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| 383 | /* skip blank or comment lines. */
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| 384 | if (!*psz || *psz == '#' || *psz == ';' || *psz == '/')
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| 385 | continue;
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| 386 |
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| 387 | /* remove the trailing newline. */
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| 388 | rc2 = (int)strlen(psz);
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| 389 | if (psz[rc2 - 1] == '\n')
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| 390 | psz[rc2 - 1] = '\0';
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| 391 |
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| 392 | /* skip to the end of the digest and terminate it. */
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| 393 | pszDigest = psz;
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| 394 | while (*psz != ' ' && *psz != '\t' && *psz)
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| 395 | psz++;
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| 396 | if (*psz)
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| 397 | {
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| 398 | *psz++ = '\0';
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| 399 |
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| 400 | /* blanks */
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| 401 | while (*psz == ' ' || *psz == '\t' || *psz == '\n')
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| 402 | psz++;
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| 403 |
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| 404 | /* check for binary asterix */
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| 405 | if (*psz != '*')
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| 406 | fLineText = fBinaryTextOpt ? fText : 0;
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| 407 | else
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| 408 | {
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| 409 | fLineText = 0;
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| 410 | psz++;
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| 411 | }
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| 412 | if (*psz)
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| 413 | {
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| 414 | /* the rest is filename. */
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| 415 | pszFilename = psz;
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| 416 |
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| 417 | /*
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| 418 | * Do the job.
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| 419 | */
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| 420 | rc2 = string_to_digest(pszDigest, Digest);
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| 421 | if (!rc2)
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| 422 | {
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| 423 | FILE *pFile2 = open_file(pszFilename, fLineText);
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| 424 | if (pFile2)
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| 425 | {
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| 426 | rc2 = check_md5sum(pFile2, Digest);
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| 427 | if (!fQuiet)
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| 428 | {
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| 429 | if (rc2 <= 0)
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| 430 | {
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| 431 | fprintf(stdout, "%s: %s\n", pszFilename, !rc2 ? "OK" : "FAILURE");
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| 432 | fflush(stdout);
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| 433 | }
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| 434 | else
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| 435 | errx(1, "Error reading '%s': %s", pszFilename, strerror(rc));
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| 436 | }
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| 437 | if (rc2)
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| 438 | rc = 1;
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|---|
| 439 | fclose(pFile2);
|
|---|
| 440 | }
|
|---|
| 441 | else
|
|---|
| 442 | {
|
|---|
| 443 | if (!fQuiet)
|
|---|
| 444 | errx(1, "Failed to open '%s': %s", pszFilename, strerror(errno));
|
|---|
| 445 | rc = 1;
|
|---|
| 446 | }
|
|---|
| 447 | }
|
|---|
| 448 | else if (!fQuiet)
|
|---|
| 449 | {
|
|---|
| 450 | errx(1, "%s (%d): Ignoring malformed digest '%s' (digest)", argv[i], iLine, pszDigest);
|
|---|
| 451 | errx(1, "%s (%d): %*s^", argv[i], iLine, rc2 - 1, "");
|
|---|
| 452 | }
|
|---|
| 453 | }
|
|---|
| 454 | else if (!fQuiet)
|
|---|
| 455 | errx(1, "%s (%d): Ignoring malformed line!", argv[i], iLine);
|
|---|
| 456 | }
|
|---|
| 457 | else if (!fQuiet)
|
|---|
| 458 | errx(1, "%s (%d): Ignoring malformed line!", argv[i], iLine);
|
|---|
| 459 | }
|
|---|
| 460 |
|
|---|
| 461 | fclose(pFile);
|
|---|
| 462 | }
|
|---|
| 463 | else
|
|---|
| 464 | {
|
|---|
| 465 | errx(1, "Failed to open '%s': %s", argv[i], strerror(errno));
|
|---|
| 466 | rc = 1;
|
|---|
| 467 | }
|
|---|
| 468 | }
|
|---|
| 469 | else
|
|---|
| 470 | {
|
|---|
| 471 | /*
|
|---|
| 472 | * Calcuate and print the MD5 sum for one file.
|
|---|
| 473 | */
|
|---|
| 474 | pFile = open_file(argv[i], fText);
|
|---|
| 475 | if (pFile)
|
|---|
| 476 | {
|
|---|
| 477 | rc2 = calc_md5sum(pFile, Digest);
|
|---|
| 478 | if (!rc2)
|
|---|
| 479 | {
|
|---|
| 480 | digest_to_string(Digest, szDigest);
|
|---|
| 481 | fprintf(stdout, "%s %s%s\n", szDigest, fText ? "" : "*", argv[i]);
|
|---|
| 482 | fflush(stdout);
|
|---|
| 483 | }
|
|---|
| 484 | else
|
|---|
| 485 | {
|
|---|
| 486 | if (!fQuiet)
|
|---|
| 487 | errx(1, "Failed to open '%s': %s", argv[i], strerror(rc));
|
|---|
| 488 | rc = 1;
|
|---|
| 489 | }
|
|---|
| 490 | fclose(pFile);
|
|---|
| 491 | }
|
|---|
| 492 | else
|
|---|
| 493 | {
|
|---|
| 494 | if (!fQuiet)
|
|---|
| 495 | errx(1, "Failed to open '%s': %s", argv[i], strerror(errno));
|
|---|
| 496 | rc = 1;
|
|---|
| 497 | }
|
|---|
| 498 | }
|
|---|
| 499 | i++;
|
|---|
| 500 | }
|
|---|
| 501 |
|
|---|
| 502 | return rc;
|
|---|
| 503 | }
|
|---|
| 504 |
|
|---|
| 505 |
|
|---|