| /* |
| FUSE: Filesystem in Userspace |
| Copyright (C) 2001-2004 Miklos Szeredi <miklos@szeredi.hu> |
| |
| This program can be distributed under the terms of the GNU GPL. |
| See the file COPYING. |
| */ |
| |
| #include <fuse.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| |
| static const char *hello_str = "Hello World!\n"; |
| static const char *hello_path = "/hello"; |
| |
| static int hello_getattr(const char *path, struct stat *stbuf) |
| { |
| int res = 0; |
| |
| memset(stbuf, 0, sizeof(struct stat)); |
| if(strcmp(path, "/") == 0) { |
| stbuf->st_mode = S_IFDIR | 0755; |
| stbuf->st_nlink = 2; |
| } |
| else if(strcmp(path, hello_path) == 0) { |
| stbuf->st_mode = S_IFREG | 0444; |
| stbuf->st_nlink = 1; |
| stbuf->st_size = strlen(hello_str); |
| } |
| else |
| res = -ENOENT; |
| |
| return res; |
| } |
| |
| static int hello_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler) |
| { |
| if(strcmp(path, "/") != 0) |
| return -ENOENT; |
| |
| filler(h, ".", 0); |
| filler(h, "..", 0); |
| filler(h, hello_path + 1, 0); |
| |
| return 0; |
| } |
| |
| static int hello_open(const char *path, int flags) |
| { |
| if(strcmp(path, hello_path) != 0) |
| return -ENOENT; |
| |
| if((flags & 3) != O_RDONLY) |
| return -EACCES; |
| |
| return 0; |
| } |
| |
| static int hello_read(const char *path, char *buf, size_t size, off_t offset) |
| { |
| size_t len; |
| if(strcmp(path, hello_path) != 0) |
| return -ENOENT; |
| |
| len = strlen(hello_str); |
| if (offset < len) { |
| if (offset + size > len) |
| size = len - offset; |
| memcpy(buf, hello_str + offset, size); |
| } else |
| size = 0; |
| |
| return size; |
| } |
| |
| static struct fuse_operations hello_oper = { |
| .getattr = hello_getattr, |
| .getdir = hello_getdir, |
| .open = hello_open, |
| .read = hello_read, |
| }; |
| |
| int main(int argc, char *argv[]) |
| { |
| fuse_main(argc, argv, &hello_oper); |
| return 0; |
| } |