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#define FUSE_USE_VERSION 31
#include <fuse3/fuse.h>
#include <libakfs.h>
#include <libaklog.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
// Called when a file is read
static int akfs_fuse_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
(void) fi; // Unused
const char *content = "Hello, World!\n";
size_t len = strlen(content);
if (strcmp(path, "/hello") != 0) // Only support "/hello"
return -ENOENT;
if (offset < 0 || (size_t)offset >= len)
return 0;
size = (size < len - offset) ? size : len - offset;
memcpy(buf, content + offset, size);
return size;
}
// Called to list files in the root directory
static int akfs_fuse_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi,
enum fuse_readdir_flags flags)
{
(void) offset; (void) fi; (void) flags; // Unused
if (strcmp(path, "/") != 0) // Only support root dir
return -ENOENT;
filler(buf, ".", NULL, 0, 0);
filler(buf, "..", NULL, 0, 0);
// example file
filler(buf, "hello", NULL, 0, 0);
// ak fs integration
size_t ms_len = ak_fs_maps_v3_found_in_fs();
akfs_map_v3 map_store[ms_len];
akfs_map_v3* mps_ptr = &map_store[0];
void* mps_start = &map_store[0];
(void)mps_start;
ak_fs_maps_v3_init(&mps_ptr, ms_len);
ak_fs_map_v3_resolve_maps(&mps_ptr, ms_len);
akfs_map_v3 *ptr = NULL;
for (ptr = mps_ptr; ptr < mps_ptr + ms_len; ++ptr)
{
if ( ak_fs_map_v3_is_null(ptr) )
{
ak_fs_map_v3_print_filename(ptr);
filler(buf, ak_fs_map_v3_get_filename(ptr), NULL, 0, 0);
}
}
return 0;
}
// Called to get file attributes (metadata)
static int akfs_fuse_getattr(const char *path, struct stat *st, struct fuse_file_info *fi)
{
(void) fi;
st->st_uid = getuid();
st->st_gid = getgid();
st->st_atime = st->st_mtime = time(NULL);
if (strcmp(path, "/") == 0) {
st->st_mode = S_IFDIR | 0755; // Directory
st->st_nlink = 2;
} else if (strcmp(path, "/hello") == 0) {
st->st_mode = S_IFREG | 0644; // Regular file
st->st_nlink = 1;
st->st_size = strlen("Hello, World!\n");
} else {
return -ENOENT; // Not found
}
return 0;
}
// FUSE operations struct (only implementing needed functions)
static struct fuse_operations akfs_fuse_ops = {
.getattr = akfs_fuse_getattr,
.readdir = akfs_fuse_readdir,
.read = akfs_fuse_read,
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &akfs_fuse_ops, NULL);
}
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