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URL https://opencores.org/ocsvn/eco32/eco32/trunk

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    /eco32/trunk
    from Rev 265 to Rev 266
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Rev 265 → Rev 266

/disk/tools/wrpart/wrpart.c
1,8 → 1,163
/*
*
* wrpart.c -- write a binary image to a partition on a disk
*/
 
 
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
 
 
#define SECTOR_SIZE 512
#define NPE (SECTOR_SIZE / sizeof(PartEntry))
#define DESCR_SIZE 20
 
 
typedef struct {
unsigned int type;
unsigned int start;
unsigned int size;
char descr[DESCR_SIZE];
} PartEntry;
 
PartEntry ptr[NPE];
 
 
/**************************************************************/
 
 
void error(char *fmt, ...) {
va_list ap;
 
va_start(ap, fmt);
printf("Error: ");
vprintf(fmt, ap);
printf("\n");
va_end(ap);
exit(1);
}
 
 
/**************************************************************/
 
 
unsigned int getNumber(unsigned char *p) {
return (unsigned int) *(p + 0) << 24 |
(unsigned int) *(p + 1) << 16 |
(unsigned int) *(p + 2) << 8 |
(unsigned int) *(p + 3) << 0;
}
 
 
void convertPartitionTable(PartEntry *e, int n) {
int i;
unsigned char *p;
 
for (i = 0; i < n; i++) {
p = (unsigned char *) &e[i];
e[i].type = getNumber(p + 0);
e[i].start = getNumber(p + 4);
e[i].size = getNumber(p + 8);
}
}
 
 
/**************************************************************/
 
 
int main(int argc, char *argv[]) {
char *diskName;
char *partNmbr;
char *partName;
FILE *disk;
unsigned int diskSize;
char *endp;
int partno;
unsigned int partStart;
unsigned int partSize;
FILE *image;
unsigned int imageSize;
unsigned int i;
unsigned char sectBuf[SECTOR_SIZE];
int n;
 
/* check command line arguments */
if (argc != 4) {
printf("Usage: %s <disk image> ", argv[0]);
printf("<partition number> <partition image>\n");
exit(1);
}
diskName = argv[1];
partNmbr = argv[2];
partName = argv[3];
/* read partition table record */
disk = fopen(diskName, "r+b");
if (disk == NULL) {
error("cannot open disk image '%s'", diskName);
}
fseek(disk, 0, SEEK_END);
diskSize = ftell(disk) / SECTOR_SIZE;
printf("disk '%s' has %u (0x%X) sectors\n",
diskName, diskSize, diskSize);
fseek(disk, 1 * SECTOR_SIZE, SEEK_SET);
if (fread(ptr, 1, SECTOR_SIZE, disk) != SECTOR_SIZE) {
error("cannot read partition table from disk image '%s'", diskName);
}
convertPartitionTable(ptr, NPE);
/* get partition number, start and size of partition */
partno = strtol(partNmbr, &endp, 10);
if (*endp != '\0') {
error("cannot read partition number");
}
if (partno < 0 || partno > 15) {
error("illegal partition number %d", partno);
}
if ((ptr[partno].type & 0x7FFFFFFF) == 0) {
error("partition %d is not allocated in partition table", partno);
}
partStart = ptr[partno].start;
partSize = ptr[partno].size;
printf("partition %d: start sector %u (0x%X), size is %u (0x%X) sectors\n",
partno, partStart, partStart, partSize, partSize);
if (partStart >= diskSize || partStart + partSize > diskSize) {
error("partition %d is larger than the disk", partno);
}
fseek(disk, partStart * SECTOR_SIZE, SEEK_SET);
/* open partition image, check size */
image = fopen(partName, "rb");
if (image == NULL) {
error("cannot open partition image '%s'", partName);
}
fseek(image, 0, SEEK_END);
imageSize = (ftell(image) + SECTOR_SIZE - 1) / SECTOR_SIZE;
printf("partition image '%s' occupies %d (0x%X) sectors\n",
partName, imageSize, imageSize);
if (imageSize >= partSize) {
error("partition image (%d sectors) too big for partition (%d sectors)",
imageSize, partSize);
}
fseek(image, 0, SEEK_SET);
/* copy partition image to partition on disk */
for (i = 0; i < imageSize; i++) {
n = fread(sectBuf, 1, SECTOR_SIZE, image);
if (n != SECTOR_SIZE) {
if (i != imageSize - 1) {
error("cannot read partition image '%s'", partName);
} else {
while (n < SECTOR_SIZE) {
sectBuf[n++] = 0;
}
}
}
n = fwrite(sectBuf, 1, SECTOR_SIZE, disk);
if (n != SECTOR_SIZE) {
error("cannot write disk image '%s'", diskName);
}
}
printf("partition image '%s' (%d sectors) copied to partition %d\n",
partName, imageSize, partno);
fclose(image);
fclose(disk);
return 0;
}

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