74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
#include <k/iso9660.h>
|
|
|
|
#include <k/types.h>
|
|
|
|
#include "atapi.h"
|
|
#include "fd.h"
|
|
#include "iso.h"
|
|
#include "stdio.h"
|
|
#include "string.h"
|
|
|
|
static u32 get_filename_length(const char *path, u32 *index)
|
|
{
|
|
u32 len = 0;
|
|
for (; path[*index]; ++(*index))
|
|
{
|
|
if (path[*index] != '/')
|
|
++len;
|
|
else {
|
|
while (path[*index] == '/')
|
|
++(*index);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
int open(const char *pathname, int flags)
|
|
{
|
|
if (flags != O_RDONLY)
|
|
return -1;
|
|
|
|
struct iso_prim_voldesc *iso_prim_block = read_block(ISO_PRIM_VOLDESC_BLOCK);
|
|
if (strncmp(iso_prim_block->std_identifier, "CD001", 5))
|
|
return -1;
|
|
|
|
struct iso_dir *root = &iso_prim_block->root_dir;
|
|
struct iso_dir *curr = read_block(root->data_blk.le);
|
|
|
|
u32 index = 0;
|
|
while (pathname[index] == '/')
|
|
++index;
|
|
|
|
for (int depth = 0; depth < MAX_DIR_DEPTH; ++depth)
|
|
{
|
|
char found = 0;
|
|
u32 start = index;
|
|
u32 length = get_filename_length(pathname, &index);
|
|
|
|
// we found the file
|
|
if (!length)
|
|
return register_fd(curr->data_blk.le);
|
|
|
|
// iteration for one directory
|
|
while (curr->dir_size != 0)
|
|
{
|
|
if (length == curr->idf_len &&
|
|
!strncmp(pathname + start, curr->idf, length))
|
|
{
|
|
curr = read_block(curr->data_blk.le);
|
|
found = 1;
|
|
break;
|
|
}
|
|
else
|
|
curr = (void *)curr + curr->dir_size;
|
|
}
|
|
|
|
if (!found)
|
|
return -1;
|
|
}
|
|
|
|
return -1;
|
|
}
|