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[util] herp

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This commit is contained in:
Kevin Lange 2011-03-22 14:31:55 -05:00
parent dcd341cdc9
commit 3ce965486d
1 changed files with 29 additions and 4 deletions
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33
util/mrboots-installer.c
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@ -108,6 +108,19 @@ iopen(
return NULL;
}
uint32_t
ext2_get_inode_block_num(
ext2_inodetable_t * inode,
uint32_t block
) {
if (block < 12) {
return inode->block[block];
} else if (block < 12 + (1024 << sblock->log_block_size) / sizeof(uint32_t)) {
return *(uint32_t*)((uintptr_t)ext2_get_block(inode->block[12]) + (block - 12) * sizeof(uint32_t));
}
return 0;
}
int main(int argc, char ** argv) {
if (argc < 3) {
fprintf(stderr, "Expected two additional arguments: a ramdisk, and a file path to second stage to find in it.\n");
@ -132,8 +145,8 @@ int main(int argc, char ** argv) {
if (sblock->inode_size == 0) {
sblock->inode_size = 128;
}
fprintf(stderr,"INODE_SIZE = 0x%x\n", sblock->inode_size);
fprintf(stderr,"BLOCK_SIZE = 0x%x\n", 0x400 << sblock->log_block_size);
fprintf(stdout,"INODE_SIZE = 0x%x\n", sblock->inode_size);
fprintf(stdout,"BLOCK_SIZE = 0x%x\n", 0x400 << sblock->log_block_size);
/* More pointers! */
ext2_bgdescriptor_t * rblock = (ext2_bgdescriptor_t *)((uintptr_t)hdd_dump + 0x400 + 0x400);
fprintf(stderr,"INODE_TABL = 0x%x\n", rblock->inode_table);
@ -143,6 +156,18 @@ int main(int argc, char ** argv) {
ext2_inodetable_t * rnode = (ext2_inodetable_t *)((uintptr_t)itable + sblock->inode_size);
fprintf(stderr, "Pretty sure everything is right so far...\n");
ext2_inodetable_t * fnode = iopen(rnode, "/boot/stage2");
fprintf(stderr, "fnode: %d\n", fnode->size);
ext2_inodetable_t * fnode = iopen(rnode, argv[2]);
if (!fnode) {
fprintf(stderr,"Failed to locate the requested file on the disk image.\n");
return -1;
}
fprintf(stdout,"FILE_SIZE = 0x%x\n", fnode->size);
fprintf(stdout,"BLOCK_COUNT = 0x%x\n", fnode->blocks);
fprintf(stdout,"BLOCK_SIZE = 0x%x\n", fnode->size / (0x400 << sblock->log_block_size)) + 1;
fprintf(stdout,"BLOCKS = { ");
for (uint32_t i = 0; i < fnode->size / (0x400 << sblock->log_block_size) + 1; ++i) {
fprintf(stdout, "%d", ext2_get_inode_block_num(fnode, i));
if (i < fnode->blocks - 1) { fprintf(stdout, ","); }
}
fprintf(stdout," }\n");
}