httpdirfs/src/fuse_local.c

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#include "fuse_local.h"
#include "cache.h"
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#include "link.h"
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#include <errno.h>
#include <string.h>
#include <unistd.h>
static void *fs_init(struct fuse_conn_info *conn);
static int fs_getattr(const char *path, struct stat *stbuf);
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi);
static int fs_open(const char *path, struct fuse_file_info *fi);
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi);
static int fs_release(const char *path, struct fuse_file_info *fi);
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static struct fuse_operations fs_oper = {
.getattr = fs_getattr,
.readdir = fs_readdir,
.open = fs_open,
.read = fs_read,
.init = fs_init,
.release = fs_release
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};
int fuse_local_init(int argc, char **argv)
{
return fuse_main(argc, argv, &fs_oper, NULL);
}
static void *fs_init(struct fuse_conn_info *conn)
{
(void) conn;
return NULL;
}
/** \brief release an opened file */
static int fs_release(const char *path, struct fuse_file_info *fi)
{
if (CACHE_SYSTEM_INIT) {
Cache_close((Cache *)fi->fh);
}
fprintf(stderr, "fs_release(): %s\n", path);
return 0;
}
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/** \brief return the attributes for a single file indicated by path */
static int fs_getattr(const char *path, struct stat *stbuf)
{
int res = 0;
memset(stbuf, 0, sizeof(struct stat));
if (!strcmp(path, "/")) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
} else {
Link *link = path_to_Link(path);
if (!link) {
return -ENOENT;
}
struct timespec spec;
spec.tv_sec = link->time;
stbuf->st_mtim = spec;
switch (link->type) {
case LINK_DIR:
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 1;
break;
case LINK_FILE:
stbuf->st_mode = S_IFREG | 0444;
stbuf->st_nlink = 1;
stbuf->st_size = link->content_length;
stbuf->st_blksize = 128*1024;
stbuf->st_blocks = (link->content_length)/512;
break;
default:
return -ENOENT;
}
}
stbuf->st_uid = getuid();
stbuf->st_gid = getgid();
return res;
}
/** \brief read a file */
static int fs_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
(void) fi;
long received = path_download(path, buf, size, offset);
return received;
}
/** \brief open a file indicated by the path */
static int fs_open(const char *path, struct fuse_file_info *fi)
{
if (!path_to_Link(path)) {
return -ENOENT;
}
if ((fi->flags & 3) != O_RDONLY) {
return -EACCES;
}
if (CACHE_SYSTEM_INIT) {
fi->fh = (uint64_t) Cache_open(path);
if (!fi->fh) {
return -ENOENT;
}
}
fprintf(stderr, "fs_open(): %s\n", path);
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return 0;
}
/** \brief read the directory indicated by the path*/
static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t dir_add,
off_t offset, struct fuse_file_info *fi)
{
(void) offset;
(void) fi;
Link *link;
LinkTable *linktbl;
if (!strcmp(path, "/")) {
linktbl = ROOT_LINK_TBL;
} else {
linktbl = path_to_Link_LinkTable_new(path);
fprintf(stderr, "Created new link table for %s\n", path);
LinkTable_print(linktbl);
if(!linktbl) {
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return -ENOENT;
}
}
/* start adding the links */
dir_add(buf, ".", NULL, 0);
dir_add(buf, "..", NULL, 0);
for (int i = 1; i < linktbl->num; i++) {
link = linktbl->links[i];
if (link->type != LINK_INVALID) {
dir_add(buf, link->p_url, NULL, 0);
}
}
return 0;
}