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Write the FAT32 BS and FAT32 IS

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This commit is contained in:
Baptiste Wicht 2016-08-11 22:55:25 +02:00
parent 4ce4318bdb
commit 6431cbc2d0
1 changed files with 28 additions and 2 deletions
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30
programs/mkfs/src/main.cpp
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@ -29,14 +29,26 @@ int main(int argc, char* argv[]){
std::string fs(fs_str); std::string fs(fs_str);
if(fs == "fat32"){ if(fs == "fat32"){
// Open the device file
auto fd = open(device_str);
if(!fd.valid()){
printf("mkfs: open error: %s\n", std::error_message(fd.error()));
exit(1);
}
// Get the size of the device
uint64_t size = 0; uint64_t size = 0;
auto code = ioctl(device_str, ioctl_request::GET_BLK_SIZE, &size); auto code = ioctl(device_str, ioctl_request::GET_BLK_SIZE, &size);
if(code){ if(code){
printf("mkfs: error: %s\n", std::error_message(code)); printf("mkfs: ioctl error: %s\n", std::error_message(code));
exit(1); exit(1);
} }
// Start computing and writing the FAT32 values
printf("mkfs: Creating Fat32 filesystem on %s\n", device_str); printf("mkfs: Creating Fat32 filesystem on %s\n", device_str);
printf("mkfs: Device size: %m\n", size); printf("mkfs: Device size: %m\n", size);
@ -79,6 +91,14 @@ int main(int argc, char* argv[]){
std::copy_n(&fat_bs->file_system_type[0], "FAT32", 5); std::copy_n(&fat_bs->file_system_type[0], "FAT32", 5);
fat_bs->signature = 0xAA55; fat_bs->signature = 0xAA55;
// Write the FAT BS
auto status = write(*fd, reinterpret_cast<const char*>(fat_bs), sector_size, 0);
if(!status.valid()){
printf("mkfs: write error: %s\n", std::error_message(status.error()));
exit(1);
}
// TODO Write fat_bs to write // TODO Write fat_bs to write
auto* fat_is = new fat32::fat_is_t(); auto* fat_is = new fat32::fat_is_t();
@ -89,7 +109,13 @@ int main(int argc, char* argv[]){
fat_is->signature_middle = 0x72724161; fat_is->signature_middle = 0x72724161;
fat_is->signature_end = 0x000055AA; fat_is->signature_end = 0x000055AA;
// TODO Write fat_bs // Write the FAT IS
status = write(*fd, reinterpret_cast<const char*>(fat_is), sector_size, sector_size);
if(!status.valid()){
printf("mkfs: write error: %s\n", std::error_message(status.error()));
exit(1);
}
//TODO Write FAT //TODO Write FAT