159 lines
2.7 KiB
C
159 lines
2.7 KiB
C
#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <string.h>
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#include <errno.h>
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#include <libgen.h>
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#include "mbr.h"
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static char *prg_name = NULL;
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static int dump_info = 0;
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static const char *diskpath = NULL;
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static FILE *diskfp = NULL;
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static FILE *partfp[4] = {
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NULL,
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NULL,
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NULL,
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NULL
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};
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static MBRHeader header;
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static void
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dump_partition_info(Partition part)
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{
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printf("\tBootable: ");
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if (part.attributes & MBR_PART_BOOTABLE)
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{
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printf("yes\n");
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}
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else
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{
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printf("no\n");
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}
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printf("\tType: %d\n", part.type);
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printf("\tLBA Start: %d\n", part.lba_start);
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printf("\tSectors: %d\n", part.sectors_count);
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}
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static void
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dump_disk(void)
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{
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int idx;
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printf("UID: ");
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for (idx = 0; idx < 10; idx++)
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{
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printf("%02X", header.uid[idx]);
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}
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printf("\n");
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for (idx = 0; idx < 4; idx++)
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{
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printf("Partition %d:\n", idx);
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dump_partition_info(header.part[idx]);
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}
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}
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static void
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usage(int retcode)
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{
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if (retcode == EXIT_FAILURE)
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{
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fprintf(stderr, "Try '%s -h' for more information.\n", prg_name);
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}
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else
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{
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printf("Usage: %s [-hVd] disk\n", prg_name);
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printf("\t-h\tdisplay this help and exit\n");
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printf("\t-V\toutput version information.\n");
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printf("\t-d\tdump disk information\n");
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printf("\t-p0-3\t\n");
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printf("\t-o out\twrite to file 'out'\n");
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printf("\t-e\textract\n");
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printf("\t-i img\t\n");
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printf("\nReport bugs to <%s>\n", MK_BUGREPORT);
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}
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exit(retcode);
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}
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static void
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version(void)
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{
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printf("%s commit %s\n", prg_name, MK_COMMIT);
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exit(EXIT_SUCCESS);
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}
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int
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main(int argc, char **argv)
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{
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char c;
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prg_name = basename(argv[0]);
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while ((argc > 1) && (argv[1][0] == '-'))
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{
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switch (argv[1][1])
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{
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case 'h':
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usage(EXIT_SUCCESS);
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break;
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case 'V':
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version();
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break;
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case 'd':
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dump_info = 1;
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break;
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case 'p':
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c = argv[1][2] - '0';
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argv++;
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argc--;
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if (c < 0 && c > 3)
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{
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usage(EXIT_FAILURE);
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}
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partfp[c] = fopen(argv[2], "rb");
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if (partfp[c] == NULL)
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{
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fprintf(stderr, "%s: %s\n", diskpath, strerror(errno));
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return (EXIT_FAILURE);
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}
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break;
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case 'e':
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break;
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default:
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usage(EXIT_FAILURE);
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}
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argv++;
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argc--;
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}
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if (argc <= 1) usage(EXIT_FAILURE);
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diskpath = argv[1];
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diskfp = fopen(diskpath, "rb");
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if (diskfp == NULL)
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{
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fprintf(stderr, "%s: %s\n", diskpath, strerror(errno));
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return (EXIT_FAILURE);
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}
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if (fread(&header, sizeof(uint8_t), sizeof(MBRHeader), diskfp) != sizeof(MBRHeader))
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{
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fprintf(stderr, "%s: can't read mbr header\n", diskpath);
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return (EXIT_FAILURE);
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}
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if (header.magic[0] != MBR_MAGIC0 || header.magic[1] != MBR_MAGIC1)
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{
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fprintf(stderr, "%s: no valid MBR\n", diskpath);
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return (EXIT_FAILURE);
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}
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if (dump_info)
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{
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dump_disk();
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}
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return (EXIT_SUCCESS);
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}
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