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104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/*
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repair.c (09.03.17)
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exFAT file system implementation library.
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Free exFAT implementation.
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Copyright (C) 2010-2018 Andrew Nayenko
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "exfat.h"
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#include <strings.h>
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int exfat_errors_fixed;
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bool exfat_ask_to_fix(const struct exfat* ef)
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{
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const char* question = "Fix (Y/N)?";
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char answer[8];
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bool yeah, nope;
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switch (ef->repair)
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{
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case EXFAT_REPAIR_NO:
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return false;
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case EXFAT_REPAIR_YES:
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printf("%s %s", question, "Y\n");
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return true;
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case EXFAT_REPAIR_ASK:
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do
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{
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printf("%s ", question);
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fflush(stdout);
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if (fgets(answer, sizeof(answer), stdin))
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{
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yeah = strcasecmp(answer, "Y\n") == 0;
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nope = strcasecmp(answer, "N\n") == 0;
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}
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else
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{
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yeah = false;
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nope = true;
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}
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}
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while (!yeah && !nope);
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return yeah;
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}
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exfat_bug("invalid repair option value: %d", ef->repair);
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return false;
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}
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bool exfat_fix_invalid_vbr_checksum(const struct exfat* ef, void* sector,
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uint32_t vbr_checksum)
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{
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size_t i;
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off_t sector_size = SECTOR_SIZE(*ef->sb);
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for (i = 0; i < sector_size / sizeof(vbr_checksum); i++)
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((le32_t*) sector)[i] = cpu_to_le32(vbr_checksum);
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if (exfat_pwrite(ef->dev, sector, sector_size, 11 * sector_size) < 0)
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{
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exfat_error("failed to write correct VBR checksum");
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return false;
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}
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exfat_errors_fixed++;
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return true;
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}
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bool exfat_fix_invalid_node_checksum(const struct exfat* ef,
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struct exfat_node* node)
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{
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/* checksum will be rewritten by exfat_flush_node() */
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node->is_dirty = true;
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exfat_errors_fixed++;
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return true;
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}
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bool exfat_fix_unknown_entry(struct exfat* ef, struct exfat_node* dir,
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const struct exfat_entry* entry, off_t offset)
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{
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struct exfat_entry deleted = *entry;
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deleted.type &= ~EXFAT_ENTRY_VALID;
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if (exfat_generic_pwrite(ef, dir, &deleted, sizeof(struct exfat_entry),
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offset) != sizeof(struct exfat_entry))
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return false;
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exfat_errors_fixed++;
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return true;
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}
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