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Modify: bf: add file optional argument

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xamidev
2024-09-05 16:10:01 +02:00
parent d2034cd68b
commit acbcc54e51
7 changed files with 69 additions and 9 deletions
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30
src/kernel/initrd.c
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@@ -102,3 +102,33 @@ void cat_initrd(uint8_t* initrd, const char* filename)
printf("File '%s' not found\n", filename);
}
int tar_file_to_buffer(uint8_t* initrd, const char* filename, char* buffer)
{
uint8_t* current_block = initrd;
while (1)
{
if (current_block[0] == '\0')
{
//puts("[tar] EOF\n");
return -1;
}
const char* file_name = (const char*)current_block;
uint32_t file_size = tar_parse_size((const char*)(current_block+124));
if (strcmp(file_name, filename) == 0)
{
uint8_t* file_data = current_block + TAR_BLOCK_SIZE;
memcpy(buffer, file_data, file_size);
buffer[file_size] = '\0';
return 0;
}
uint32_t total_size = ((file_size + TAR_BLOCK_SIZE - 1) / TAR_BLOCK_SIZE) * TAR_BLOCK_SIZE;
current_block += TAR_BLOCK_SIZE + total_size;
}
printf("[tar] file '%s' not found\n", filename);
return -1;
}