cvs/example/fusexmp.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 <config.h>

#ifdef linux
/* For pread()/pwrite() */
#define _XOPEN_SOURCE 500
#endif

#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <sys/statfs.h>
#ifdef HAVE_SETXATTR
#include <sys/xattr.h>
#endif

static int xmp_getattr(const char *path, struct stat *stbuf)
{
    int res;

    res = lstat(path, stbuf);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_readlink(const char *path, char *buf, size_t size)
{
    int res;

    res = readlink(path, buf, size - 1);
    if(res == -1)
        return -errno;

    buf[res] = '\0';
    return 0;
}


static int xmp_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler)
{
    DIR *dp;
    struct dirent *de;
    int res = 0;

    dp = opendir(path);
    if(dp == NULL)
        return -errno;

    while((de = readdir(dp)) != NULL) {
        res = filler(h, de->d_name, de->d_type);
        if(res != 0)
            break;
    }

    closedir(dp);
    return res;
}

static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
{
    int res;

    res = mknod(path, mode, rdev);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_mkdir(const char *path, mode_t mode)
{
    int res;

    res = mkdir(path, mode);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_unlink(const char *path)
{
    int res;

    res = unlink(path);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_rmdir(const char *path)
{
    int res;

    res = rmdir(path);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_symlink(const char *from, const char *to)
{
    int res;

    res = symlink(from, to);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_rename(const char *from, const char *to)
{
    int res;

    res = rename(from, to);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_link(const char *from, const char *to)
{
    int res;

    res = link(from, to);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_chmod(const char *path, mode_t mode)
{
    int res;

    res = chmod(path, mode);
    if(res == -1)
        return -errno;
    
    return 0;
}

static int xmp_chown(const char *path, uid_t uid, gid_t gid)
{
    int res;

    res = lchown(path, uid, gid);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_truncate(const char *path, off_t size)
{
    int res;
    
    res = truncate(path, size);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_utime(const char *path, struct utimbuf *buf)
{
    int res;
    
    res = utime(path, buf);
    if(res == -1)
        return -errno;

    return 0;
}


static int xmp_open(const char *path, int flags)
{
    int res;

    res = open(path, flags);
    if(res == -1) 
        return -errno;

    close(res);
    return 0;
}

static int xmp_read(const char *path, char *buf, size_t size, off_t offset)
{
    int fd;
    int res;

    fd = open(path, O_RDONLY);
    if(fd == -1)
        return -errno;

    res = pread(fd, buf, size, offset);
    if(res == -1)
        res = -errno;
    
    close(fd);
    return res;
}

static int xmp_write(const char *path, const char *buf, size_t size,
                     off_t offset)
{
    int fd;
    int res;

    fd = open(path, O_WRONLY);
    if(fd == -1)
        return -errno;

    res = pwrite(fd, buf, size, offset);
    if(res == -1)
        res = -errno;
    
    close(fd);
    return res;
}

static int xmp_statfs(const char *path, struct statfs *stbuf)
{
    int res;

    res = statfs(path, stbuf);
    if(res == -1)
        return -errno;

    return 0;
}

static int xmp_release(const char *path, int flags)
{
    /* Just a stub.  This method is optional and can safely be left
       unimplemented */

    (void) path;
    (void) flags;
    return 0;
}

static int xmp_fsync(const char *path, int isdatasync)
{
    /* Just a stub.  This method is optional and can safely be left
       unimplemented */

    (void) path;
    (void) isdatasync;
    return 0;
}

#ifdef HAVE_SETXATTR
/* xattr operations are optional and can safely be left unimplemented */
static int xmp_setxattr(const char *path, const char *name, const char *value,
                        size_t size, int flags)
{
    int res = lsetxattr(path, name, value, size, flags);
    if(res == -1)
        return -errno;
    return 0;
}

static int xmp_getxattr(const char *path, const char *name, char *value,
                    size_t size)
{
    int res = lgetxattr(path, name, value, size);
    if(res == -1)
        return -errno;
    return res;
}

static int xmp_listxattr(const char *path, char *list, size_t size)
{
    int res = llistxattr(path, list, size);
    if(res == -1)
        return -errno;
    return res;
}

static int xmp_removexattr(const char *path, const char *name)
{
    int res = lremovexattr(path, name);
    if(res == -1)
        return -errno;
    return 0;
}
#endif /* HAVE_SETXATTR */

static struct fuse_operations xmp_oper = {
    .getattr    = xmp_getattr,
    .readlink   = xmp_readlink,
    .getdir     = xmp_getdir,
    .mknod      = xmp_mknod,
    .mkdir      = xmp_mkdir,
    .symlink    = xmp_symlink,
    .unlink     = xmp_unlink,
    .rmdir      = xmp_rmdir,
    .rename     = xmp_rename,
    .link       = xmp_link,
    .chmod      = xmp_chmod,
    .chown      = xmp_chown,
    .truncate   = xmp_truncate,
    .utime      = xmp_utime,
    .open       = xmp_open,
    .read       = xmp_read,
    .write      = xmp_write,
    .statfs     = xmp_statfs,
    .release    = xmp_release,
    .fsync      = xmp_fsync,
#ifdef HAVE_SETXATTR
    .setxattr   = xmp_setxattr,
    .getxattr   = xmp_getxattr,
    .listxattr  = xmp_listxattr,
    .removexattr= xmp_removexattr,
#endif
};

int main(int argc, char *argv[])
{
    fuse_main(argc, argv, &xmp_oper);
    return 0;
}
1	dpavlin	4	/*
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 <config.h>
10
11			#ifdef linux
12			/* For pread()/pwrite() */
13			#define _XOPEN_SOURCE 500
14			#endif
15
16			#include <fuse.h>
17			#include <stdio.h>
18			#include <string.h>
19			#include <unistd.h>
20			#include <fcntl.h>
21			#include <dirent.h>
22			#include <errno.h>
23			#include <sys/statfs.h>
24			#ifdef HAVE_SETXATTR
25			#include <sys/xattr.h>
26			#endif
27
28			static int xmp_getattr(const char path, struct stat stbuf)
29			{
30			int res;
31
32			res = lstat(path, stbuf);
33			if(res == -1)
34			return -errno;
35
36			return 0;
37			}
38
39			static int xmp_readlink(const char path, char buf, size_t size)
40			{
41			int res;
42
43			res = readlink(path, buf, size - 1);
44			if(res == -1)
45			return -errno;
46
47			buf[res] = '\0';
48			return 0;
49			}
50
51
52			static int xmp_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler)
53			{
54			DIR *dp;
55			struct dirent *de;
56			int res = 0;
57
58			dp = opendir(path);
59			if(dp == NULL)
60			return -errno;
61
62			while((de = readdir(dp)) != NULL) {
63			res = filler(h, de->d_name, de->d_type);
64			if(res != 0)
65			break;
66			}
67
68			closedir(dp);
69			return res;
70			}
71
72			static int xmp_mknod(const char *path, mode_t mode, dev_t rdev)
73			{
74			int res;
75
76			res = mknod(path, mode, rdev);
77			if(res == -1)
78			return -errno;
79
80			return 0;
81			}
82
83			static int xmp_mkdir(const char *path, mode_t mode)
84			{
85			int res;
86
87			res = mkdir(path, mode);
88			if(res == -1)
89			return -errno;
90
91			return 0;
92			}
93
94			static int xmp_unlink(const char *path)
95			{
96			int res;
97
98			res = unlink(path);
99			if(res == -1)
100			return -errno;
101
102			return 0;
103			}
104
105			static int xmp_rmdir(const char *path)
106			{
107			int res;
108
109			res = rmdir(path);
110			if(res == -1)
111			return -errno;
112
113			return 0;
114			}
115
116			static int xmp_symlink(const char from, const char to)
117			{
118			int res;
119
120			res = symlink(from, to);
121			if(res == -1)
122			return -errno;
123
124			return 0;
125			}
126
127			static int xmp_rename(const char from, const char to)
128			{
129			int res;
130
131			res = rename(from, to);
132			if(res == -1)
133			return -errno;
134
135			return 0;
136			}
137
138			static int xmp_link(const char from, const char to)
139			{
140			int res;
141
142			res = link(from, to);
143			if(res == -1)
144			return -errno;
145
146			return 0;
147			}
148
149			static int xmp_chmod(const char *path, mode_t mode)
150			{
151			int res;
152
153			res = chmod(path, mode);
154			if(res == -1)
155			return -errno;
156
157			return 0;
158			}
159
160			static int xmp_chown(const char *path, uid_t uid, gid_t gid)
161			{
162			int res;
163
164			res = lchown(path, uid, gid);
165			if(res == -1)
166			return -errno;
167
168			return 0;
169			}
170
171			static int xmp_truncate(const char *path, off_t size)
172			{
173			int res;
174
175			res = truncate(path, size);
176			if(res == -1)
177			return -errno;
178
179			return 0;
180			}
181
182			static int xmp_utime(const char path, struct utimbuf buf)
183			{
184			int res;
185
186			res = utime(path, buf);
187			if(res == -1)
188			return -errno;
189
190			return 0;
191			}
192
193
194			static int xmp_open(const char *path, int flags)
195			{
196			int res;
197
198			res = open(path, flags);
199			if(res == -1)
200			return -errno;
201
202			close(res);
203			return 0;
204			}
205
206			static int xmp_read(const char path, char buf, size_t size, off_t offset)
207			{
208			int fd;
209			int res;
210
211			fd = open(path, O_RDONLY);
212			if(fd == -1)
213			return -errno;
214
215			res = pread(fd, buf, size, offset);
216			if(res == -1)
217			res = -errno;
218
219			close(fd);
220			return res;
221			}
222
223			static int xmp_write(const char path, const char buf, size_t size,
224			off_t offset)
225			{
226			int fd;
227			int res;
228
229			fd = open(path, O_WRONLY);
230			if(fd == -1)
231			return -errno;
232
233			res = pwrite(fd, buf, size, offset);
234			if(res == -1)
235			res = -errno;
236
237			close(fd);
238			return res;
239			}
240
241			static int xmp_statfs(const char path, struct statfs stbuf)
242			{
243			int res;
244
245			res = statfs(path, stbuf);
246			if(res == -1)
247			return -errno;
248
249			return 0;
250			}
251
252			static int xmp_release(const char *path, int flags)
253			{
254			/* Just a stub. This method is optional and can safely be left
255			unimplemented */
256
257			(void) path;
258			(void) flags;
259			return 0;
260			}
261
262			static int xmp_fsync(const char *path, int isdatasync)
263			{
264			/* Just a stub. This method is optional and can safely be left
265			unimplemented */
266
267			(void) path;
268			(void) isdatasync;
269			return 0;
270			}
271
272			#ifdef HAVE_SETXATTR
273			/* xattr operations are optional and can safely be left unimplemented */
274			static int xmp_setxattr(const char path, const char name, const char *value,
275			size_t size, int flags)
276			{
277			int res = lsetxattr(path, name, value, size, flags);
278			if(res == -1)
279			return -errno;
280			return 0;
281			}
282
283			static int xmp_getxattr(const char path, const char name, char *value,
284			size_t size)
285			{
286			int res = lgetxattr(path, name, value, size);
287			if(res == -1)
288			return -errno;
289			return res;
290			}
291
292			static int xmp_listxattr(const char path, char list, size_t size)
293			{
294			int res = llistxattr(path, list, size);
295			if(res == -1)
296			return -errno;
297			return res;
298			}
299
300			static int xmp_removexattr(const char path, const char name)
301			{
302			int res = lremovexattr(path, name);
303			if(res == -1)
304			return -errno;
305			return 0;
306			}
307			#endif /* HAVE_SETXATTR */
308
309			static struct fuse_operations xmp_oper = {
310			.getattr = xmp_getattr,
311			.readlink = xmp_readlink,
312			.getdir = xmp_getdir,
313			.mknod = xmp_mknod,
314			.mkdir = xmp_mkdir,
315			.symlink = xmp_symlink,
316			.unlink = xmp_unlink,
317			.rmdir = xmp_rmdir,
318			.rename = xmp_rename,
319			.link = xmp_link,
320			.chmod = xmp_chmod,
321			.chown = xmp_chown,
322			.truncate = xmp_truncate,
323			.utime = xmp_utime,
324			.open = xmp_open,
325			.read = xmp_read,
326			.write = xmp_write,
327			.statfs = xmp_statfs,
328			.release = xmp_release,
329			.fsync = xmp_fsync,
330			#ifdef HAVE_SETXATTR
331			.setxattr = xmp_setxattr,
332			.getxattr = xmp_getxattr,
333			.listxattr = xmp_listxattr,
334			.removexattr= xmp_removexattr,
335			#endif
336			};
337
338			int main(int argc, char *argv[])
339			{
340			fuse_main(argc, argv, &xmp_oper);
341			return 0;
342			}