1 | /* vi: set sw=4 ts=4: */
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2 | /* eraseall.c -- erase the whole of a MTD device
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3 | *
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4 | * Ported to busybox from mtd-utils.
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5 | *
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6 | * Copyright (C) 2000 Arcom Control System Ltd
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7 | *
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8 | * Renamed to flash_eraseall.c
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9 | *
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10 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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11 | */
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12 |
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13 | //usage:#define flash_eraseall_trivial_usage
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14 | //usage: "[-jq] MTD_DEVICE"
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15 | //usage:#define flash_eraseall_full_usage "\n\n"
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16 | //usage: "Erase an MTD device\n"
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17 | //usage: "\n -j Format the device for jffs2"
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18 | //usage: "\n -q Don't display progress messages"
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19 |
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20 | #include "libbb.h"
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21 | #include <mtd/mtd-user.h>
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22 | #include <linux/jffs2.h>
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23 |
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24 | #define OPTION_J (1 << 0)
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25 | #define OPTION_Q (1 << 1)
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26 | #define IS_NAND (1 << 2)
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27 | #define BBTEST (1 << 3)
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28 |
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29 | /* mtd/jffs2-user.h used to have this atrocity:
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30 | extern int target_endian;
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31 |
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32 | #define t16(x) ({ __u16 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_16(__b); })
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33 | #define t32(x) ({ __u32 __b = (x); (target_endian==__BYTE_ORDER)?__b:bswap_32(__b); })
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34 |
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35 | #define cpu_to_je16(x) ((jint16_t){t16(x)})
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36 | #define cpu_to_je32(x) ((jint32_t){t32(x)})
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37 | #define cpu_to_jemode(x) ((jmode_t){t32(x)})
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38 |
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39 | #define je16_to_cpu(x) (t16((x).v16))
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40 | #define je32_to_cpu(x) (t32((x).v32))
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41 | #define jemode_to_cpu(x) (t32((x).m))
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42 |
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43 | but mtd/jffs2-user.h is gone now (at least 2.6.31.6 does not have it anymore)
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44 | */
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45 |
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46 | /* We always use native endianness */
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47 | #undef cpu_to_je16
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48 | #undef cpu_to_je32
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49 | #define cpu_to_je16(v) ((jint16_t){(v)})
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50 | #define cpu_to_je32(v) ((jint32_t){(v)})
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51 |
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52 | static void show_progress(mtd_info_t *meminfo, erase_info_t *erase)
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53 | {
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54 | printf("\rErasing %u Kibyte @ %x - %2u%% complete.",
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55 | (unsigned)meminfo->erasesize / 1024,
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56 | erase->start,
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57 | (unsigned) ((unsigned long long) erase->start * 100 / meminfo->size)
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58 | );
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59 | fflush_all();
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60 | }
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61 |
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62 | int flash_eraseall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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63 | int flash_eraseall_main(int argc UNUSED_PARAM, char **argv)
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64 | {
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65 | struct jffs2_unknown_node cleanmarker;
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66 | mtd_info_t meminfo;
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67 | int fd, clmpos, clmlen;
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68 | erase_info_t erase;
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69 | struct stat st;
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70 | unsigned int flags;
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71 | char *mtd_name;
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72 |
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73 | opt_complementary = "=1";
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74 | flags = BBTEST | getopt32(argv, "jq");
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75 |
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76 | mtd_name = argv[optind];
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77 | fd = xopen(mtd_name, O_RDWR);
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78 | fstat(fd, &st);
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79 | if (!S_ISCHR(st.st_mode))
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80 | bb_error_msg_and_die("%s: not a char device", mtd_name);
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81 |
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82 | xioctl(fd, MEMGETINFO, &meminfo);
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83 | erase.length = meminfo.erasesize;
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84 | if (meminfo.type == MTD_NANDFLASH)
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85 | flags |= IS_NAND;
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86 |
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87 | clmpos = 0;
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88 | clmlen = 8;
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89 | if (flags & OPTION_J) {
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90 | uint32_t *crc32_table;
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91 |
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92 | crc32_table = crc32_filltable(NULL, 0);
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93 |
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94 | cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
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95 | cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER);
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96 | if (!(flags & IS_NAND))
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97 | cleanmarker.totlen = cpu_to_je32(sizeof(struct jffs2_unknown_node));
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98 | else {
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99 | struct nand_oobinfo oobinfo;
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100 |
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101 | xioctl(fd, MEMGETOOBSEL, &oobinfo);
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102 |
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103 | /* Check for autoplacement */
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104 | if (oobinfo.useecc == MTD_NANDECC_AUTOPLACE) {
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105 | /* Get the position of the free bytes */
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106 | clmpos = oobinfo.oobfree[0][0];
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107 | clmlen = oobinfo.oobfree[0][1];
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108 | if (clmlen > 8)
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109 | clmlen = 8;
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110 | if (clmlen == 0)
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111 | bb_error_msg_and_die("autoplacement selected and no empty space in oob");
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112 | } else {
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113 | /* Legacy mode */
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114 | switch (meminfo.oobsize) {
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115 | case 8:
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116 | clmpos = 6;
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117 | clmlen = 2;
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118 | break;
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119 | case 16:
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120 | clmpos = 8;
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121 | /*clmlen = 8;*/
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122 | break;
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123 | case 64:
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124 | clmpos = 16;
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125 | /*clmlen = 8;*/
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126 | break;
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127 | }
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128 | }
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129 | cleanmarker.totlen = cpu_to_je32(8);
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130 | }
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131 |
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132 | cleanmarker.hdr_crc = cpu_to_je32(
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133 | crc32_block_endian0(0, &cleanmarker, sizeof(struct jffs2_unknown_node) - 4, crc32_table)
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134 | );
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135 | }
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136 |
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137 | /* Don't want to destroy progress indicator by bb_error_msg's */
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138 | applet_name = xasprintf("\n%s: %s", applet_name, mtd_name);
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139 |
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140 | for (erase.start = 0; erase.start < meminfo.size;
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141 | erase.start += meminfo.erasesize) {
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142 | if (flags & BBTEST) {
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143 | int ret;
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144 | loff_t offset = erase.start;
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145 |
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146 | ret = ioctl(fd, MEMGETBADBLOCK, &offset);
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147 | if (ret > 0) {
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148 | if (!(flags & OPTION_Q))
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149 | bb_info_msg("\nSkipping bad block at 0x%08x", erase.start);
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150 | continue;
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151 | }
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152 | if (ret < 0) {
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153 | /* Black block table is not available on certain flash
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154 | * types e.g. NOR
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155 | */
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156 | if (errno == EOPNOTSUPP) {
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157 | flags &= ~BBTEST;
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158 | if (flags & IS_NAND)
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159 | bb_error_msg_and_die("bad block check not available");
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160 | } else {
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161 | bb_perror_msg_and_die("MEMGETBADBLOCK error");
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162 | }
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163 | }
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164 | }
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165 |
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166 | if (!(flags & OPTION_Q))
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167 | show_progress(&meminfo, &erase);
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168 |
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169 | xioctl(fd, MEMERASE, &erase);
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170 |
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171 | /* format for JFFS2 ? */
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172 | if (!(flags & OPTION_J))
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173 | continue;
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174 |
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175 | /* write cleanmarker */
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176 | if (flags & IS_NAND) {
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177 | struct mtd_oob_buf oob;
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178 |
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179 | oob.ptr = (unsigned char *) &cleanmarker;
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180 | oob.start = erase.start + clmpos;
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181 | oob.length = clmlen;
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182 | xioctl(fd, MEMWRITEOOB, &oob);
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183 | } else {
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184 | xlseek(fd, erase.start, SEEK_SET);
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185 | /* if (lseek(fd, erase.start, SEEK_SET) < 0) {
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186 | bb_perror_msg("MTD %s failure", "seek");
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187 | continue;
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188 | } */
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189 | xwrite(fd, &cleanmarker, sizeof(cleanmarker));
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190 | /* if (write(fd, &cleanmarker, sizeof(cleanmarker)) != sizeof(cleanmarker)) {
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191 | bb_perror_msg("MTD %s failure", "write");
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192 | continue;
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193 | } */
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194 | }
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195 | if (!(flags & OPTION_Q))
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196 | printf(" Cleanmarker written at %x.", erase.start);
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197 | }
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198 | if (!(flags & OPTION_Q)) {
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199 | show_progress(&meminfo, &erase);
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200 | bb_putchar('\n');
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201 | }
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202 |
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203 | if (ENABLE_FEATURE_CLEAN_UP)
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204 | close(fd);
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205 | return EXIT_SUCCESS;
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206 | }
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