90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.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 "network.h"
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#include "fuse_local.h"
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static const char *hello_str = "Hello World!\n";
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static const char *hello_path = "/hello";
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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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/** \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, "/") == 0) {
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stbuf->st_mode = S_IFDIR | 0755;
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stbuf->st_nlink = 100;
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} else if (strcmp(path, hello_path) == 0) {
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stbuf->st_mode = S_IFREG | 0444;
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stbuf->st_nlink = 100;
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stbuf->st_size = strlen(hello_str);
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} else
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res = -ENOENT;
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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 filler,
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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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if (strcmp(path, "/") != 0)
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return -ENOENT;
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filler(buf, ".", NULL, 0);
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filler(buf, "..", NULL, 0);
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filler(buf, hello_path + 1, NULL, 0);
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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 (strcmp(path, hello_path) != 0)
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return -ENOENT;
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if ((fi->flags & 3) != O_RDONLY)
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return -EACCES;
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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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size_t len;
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(void) fi;
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if(strcmp(path, hello_path) != 0)
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return -ENOENT;
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len = strlen(hello_str);
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if (offset < len) {
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if (offset + size > len)
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size = len - offset;
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memcpy(buf, hello_str + offset, size);
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} else
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size = 0;
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return size;
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}
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