Attachment 835743 Details for Bug 1040945 – hello.c

hello.c

hello.c (text/plain), 1.93 KB, created by Richard W.M. Jones on 2013-12-12 11:46:28 UTC

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Creator: Richard W.M. Jones

Created: 2013-12-12 11:46:28 UTC

Size: 1.93 KB

patch

obsolete

>/*
>  FUSE: Filesystem in Userspace
>  Copyright (C) 2001-2007  Miklos Szeredi <miklos@szeredi.hu>
>
>  This program can be distributed under the terms of the GNU GPL.
>  See the file COPYING.
>
>  gcc -Wall hello.c `pkg-config fuse --cflags --libs` -o hello
>*/
>
>#define FUSE_USE_VERSION 26
>
>#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_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
>			 off_t offset, struct fuse_file_info *fi)
>{
>	(void) offset;
>	(void) fi;
>
>	if (strcmp(path, "/") != 0)
>		return -ENOENT;
>
>	filler(buf, ".", NULL, 0);
>	filler(buf, "..", NULL, 0);
>	filler(buf, hello_path + 1, NULL, 0);
>
>	return 0;
>}
>
>static int hello_open(const char *path, struct fuse_file_info *fi)
>{
>	if (strcmp(path, hello_path) != 0)
>		return -ENOENT;
>
>	if ((fi->flags & 3) != O_RDONLY)
>		return -EACCES;
>
>	return 0;
>}
>
>static int hello_read(const char *path, char *buf, size_t size, off_t offset,
>		      struct fuse_file_info *fi)
>{
>	size_t len;
>	(void) fi;
>	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,
>	.readdir	= hello_readdir,
>	.open		= hello_open,
>	.read		= hello_read,
>};
>
>int main(int argc, char *argv[])
>{
>	return fuse_main(argc, argv, &hello_oper, NULL);
>}

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