129 lines
3.1 KiB
C
129 lines
3.1 KiB
C
#include "network.h"
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/* must be included before including <fuse.h> */
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#define FUSE_USE_VERSION 26
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#include <fuse.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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static int fs_getattr(const char *path, struct stat *stbuf);
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static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
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off_t offset, struct fuse_file_info *fi);
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static int fs_open(const char *path, struct fuse_file_info *fi);
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static int fs_read(const char *path, char *buf, size_t size, off_t offset,
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struct fuse_file_info *fi);
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static struct fuse_operations fs_oper = {
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.getattr = fs_getattr,
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.readdir = fs_readdir,
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.open = fs_open,
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.read = fs_read,
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};
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int main(int argc, char **argv) {
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network_init(argv[1]);
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return fuse_main(argc - 1, argv + 1, &fs_oper, NULL);
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}
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/** \brief return the attributes for a single file indicated by path */
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static int fs_getattr(const char *path, struct stat *stbuf)
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{
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int res = 0;
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memset(stbuf, 0, sizeof(struct stat));
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if (!strcmp(path, "/")) {
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stbuf->st_mode = S_IFDIR | 0755;
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stbuf->st_nlink = 1;
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} else {
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Link *link = path_to_Link(path);
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if (!link) {
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return -ENOENT;
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}
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switch (link->type) {
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case LINK_DIR:
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stbuf->st_mode = S_IFDIR | 0755;
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stbuf->st_nlink = 1;
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break;
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case LINK_FILE:
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stbuf->st_mode = S_IFREG | 0444;
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stbuf->st_nlink = 1;
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stbuf->st_size = link->content_length;
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break;
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default:
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return -ENOENT;
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}
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}
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return res;
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}
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/** \brief read the directory indicated by the path*/
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static int fs_readdir(const char *path, void *buf, fuse_fill_dir_t dir_add,
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off_t offset, struct fuse_file_info *fi)
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{
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(void) offset;
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(void) fi;
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Link *link;
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LinkTable *linktbl;
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if (!strcmp(path, "/")) {
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linktbl = ROOT_LINK_TBL;
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} else {
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link = path_to_Link(path);
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if (!link) {
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return -ENOENT;
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}
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linktbl = link->next_table;
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if (!linktbl) {
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return -ENOENT;
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}
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}
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/* start adding the links */
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dir_add(buf, ".", NULL, 0);
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dir_add(buf, "..", NULL, 0);
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for (int i = 1; i < linktbl->num; i++) {
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link = linktbl->links[i];
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dir_add(buf, link->p_url, NULL, 0);
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}
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return 0;
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}
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/** \brief open a file indicated by the path */
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static int fs_open(const char *path, struct fuse_file_info *fi)
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{
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if (!path_to_Link(path)) {
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return -ENOENT;
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}
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if ((fi->flags & 3) != O_RDONLY) {
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return -EACCES;
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}
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return 0;
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}
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/** \brief read a file */
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static int fs_read(const char *path, char *buf, size_t size, off_t offset,
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struct fuse_file_info *fi)
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{
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(void) fi;
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Link *link;
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link = path_to_Link(path);
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if (!link) {
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return -ENOENT;
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}
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int bytes_downloaded = Link_download(link, offset, size);
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memcpy(buf, link->body, bytes_downloaded);
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return bytes_downloaded;
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}
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