Adding upstream version 1.2.0.upstream/1.2.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 159 insertions, 0 deletions

diff --git a/fsck/repair.c b/fsck/repair.c
new file mode 100644
index 0000000..92b1c3f
--- /dev/null
+++ b/fsck/repair.c
@@ -0,0 +1,159 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ *  Copyright (C) 2020 Hyunchul Lee <hyc.lee@gmail.com>
+ */
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "exfat_ondisk.h"
+#include "libexfat.h"
+#include "repair.h"
+#include "exfat_fs.h"
+#include "exfat_dir.h"
+#include "fsck.h"
+
+struct exfat_repair_problem {
+	er_problem_code_t	prcode;
+	unsigned int		flags;
+	unsigned int		prompt_type;
+	unsigned int		default_number;
+	unsigned int		bypass_number;
+	unsigned int		max_number;
+};
+
+/* Problem flags */
+#define ERF_PREEN_YES		0x00000001
+#define ERF_DEFAULT_YES		0x00000002
+#define ERF_DEFAULT_NO		0x00000004
+
+/* Prompt types */
+#define ERP_FIX			0x00000001
+#define ERP_TRUNCATE		0x00000002
+#define ERP_DELETE		0x00000003
+#define ERP_RENAME		0x00000004
+
+static const char *prompts[] = {
+	"Repair",
+	"Fix",
+	"Truncate",
+	"Delete",
+	"Select",
+};
+
+static struct exfat_repair_problem problems[] = {
+	{ER_BS_CHECKSUM, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_BS_BOOT_REGION, 0, ERP_FIX, 0, 0, 0},
+	{ER_DE_CHECKSUM, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_UNKNOWN, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_FILE, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_SECONDARY_COUNT, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_STREAM, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_NAME, ERF_PREEN_YES, ERP_DELETE, 0, 0, 0},
+	{ER_DE_NAME_HASH, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_DE_NAME_LEN, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_DE_DOT_NAME, ERF_PREEN_YES, ERP_RENAME, 2, 3, 4},
+	{ER_FILE_VALID_SIZE, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+	{ER_FILE_INVALID_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_FIRST_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_SMALLER_SIZE, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_LARGER_SIZE, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_DUPLICATED_CLUS, ERF_PREEN_YES, ERP_TRUNCATE, 0, 0, 0},
+	{ER_FILE_ZERO_NOFAT, ERF_PREEN_YES, ERP_FIX, 0, 0, 0},
+};
+
+static struct exfat_repair_problem *find_problem(er_problem_code_t prcode)
+{
+	unsigned int i;
+
+	for (i = 0; i < sizeof(problems)/sizeof(problems[0]); i++) {
+		if (problems[i].prcode == prcode) {
+			return &problems[i];
+		}
+	}
+	return NULL;
+}
+
+static int ask_repair(struct exfat_fsck *fsck, struct exfat_repair_problem *pr)
+{
+	int repair = 0;
+	char answer[8];
+
+	if (fsck->options & FSCK_OPTS_REPAIR_NO ||
+	    pr->flags & ERF_DEFAULT_NO)
+		repair = 0;
+	else if (fsck->options & FSCK_OPTS_REPAIR_YES ||
+		 pr->flags & ERF_DEFAULT_YES)
+		repair = 1;
+	else {
+		if (fsck->options & FSCK_OPTS_REPAIR_ASK) {
+			do {
+				if (pr->prompt_type & ERP_RENAME) {
+					printf("%s (Number: ?) ",
+					       prompts[pr->prompt_type]);
+				} else {
+					printf(". %s (y/N)? ",
+					       prompts[pr->prompt_type]);
+				}
+				fflush(stdout);
+
+				if (!fgets(answer, sizeof(answer), stdin))
+					continue;
+
+				if (pr->prompt_type & ERP_RENAME) {
+					unsigned int number = atoi(answer);
+
+					if (number > 0 && number < pr->max_number)
+						return number;
+				} else {
+					if (strcasecmp(answer, "Y\n") == 0)
+						return 1;
+					else if (strcasecmp(answer, "\n") == 0 ||
+						 strcasecmp(answer, "N\n") == 0)
+						return 0;
+				}
+			} while (1);
+		} else if (fsck->options & FSCK_OPTS_REPAIR_AUTO &&
+			   pr->flags & ERF_PREEN_YES)
+			repair = 1;
+	}
+
+	if (pr->prompt_type & ERP_RENAME) {
+		int print_num = repair ? pr->default_number : pr->bypass_number;
+
+		printf("%s (Number : %d)\n", prompts[pr->prompt_type],
+		       print_num);
+		repair = print_num;
+	} else {
+		printf(". %s (y/N)? %c\n", prompts[pr->prompt_type],
+		       repair ? 'y' : 'n');
+	}
+	return repair;
+}
+
+int exfat_repair_ask(struct exfat_fsck *fsck, er_problem_code_t prcode,
+		     const char *desc, ...)
+{
+	struct exfat_repair_problem *pr = NULL;
+	va_list ap;
+	int repair;
+
+	pr = find_problem(prcode);
+	if (!pr) {
+		exfat_err("unknown problem code. %#x\n", prcode);
+		return 0;
+	}
+
+	va_start(ap, desc);
+	vprintf(desc, ap);
+	va_end(ap);
+
+	repair = ask_repair(fsck, pr);
+	if (repair) {
+		if (pr->prompt_type & ERP_TRUNCATE)
+			fsck->dirty_fat = true;
+		fsck->dirty = true;
+	}
+	return repair;
+}