cvs/example/hello.c

/*
    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;
}
1	/*
2	FUSE: Filesystem in Userspace
3	Copyright (C) 2001-2004 Miklos Szeredi <miklos@szeredi.hu>
4
5	This program can be distributed under the terms of the GNU GPL.
6	See the file COPYING.
7	*/
8
9	#include <fuse.h>
10	#include <stdio.h>
11	#include <string.h>
12	#include <errno.h>
13	#include <fcntl.h>
14
15	static const char *hello_str = "Hello World!\n";
16	static const char *hello_path = "/hello";
17
18	static int hello_getattr(const char path, struct stat stbuf)
19	{
20	int res = 0;
21
22	memset(stbuf, 0, sizeof(struct stat));
23	if(strcmp(path, "/") == 0) {
24	stbuf->st_mode = S_IFDIR \| 0755;
25	stbuf->st_nlink = 2;
26	}
27	else if(strcmp(path, hello_path) == 0) {
28	stbuf->st_mode = S_IFREG \| 0444;
29	stbuf->st_nlink = 1;
30	stbuf->st_size = strlen(hello_str);
31	}
32	else
33	res = -ENOENT;
34
35	return res;
36	}
37
38	static int hello_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler)
39	{
40	if(strcmp(path, "/") != 0)
41	return -ENOENT;
42
43	filler(h, ".", 0);
44	filler(h, "..", 0);
45	filler(h, hello_path + 1, 0);
46
47	return 0;
48	}
49
50	static int hello_open(const char *path, int flags)
51	{
52	if(strcmp(path, hello_path) != 0)
53	return -ENOENT;
54
55	if((flags & 3) != O_RDONLY)
56	return -EACCES;
57
58	return 0;
59	}
60
61	static int hello_read(const char path, char buf, size_t size, off_t offset)
62	{
63	size_t len;
64	if(strcmp(path, hello_path) != 0)
65	return -ENOENT;
66
67	len = strlen(hello_str);
68	if (offset < len) {
69	if (offset + size > len)
70	size = len - offset;
71	memcpy(buf, hello_str + offset, size);
72	} else
73	size = 0;
74
75	return size;
76	}
77
78	static struct fuse_operations hello_oper = {
79	.getattr = hello_getattr,
80	.getdir = hello_getdir,
81	.open = hello_open,
82	.read = hello_read,
83	};
84
85	int main(int argc, char *argv[])
86	{
87	fuse_main(argc, argv, &hello_oper);
88	return 0;
89	}