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/*
plpfuse: Expose EPOC's file system via FUSE
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
Copyright (C) 2007-2008 Reuben Thomas <rrt@sc3d.org>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/time.h>
#include <syslog.h>
#include <attr/xattr.h>
#include <attr/attributes.h>
#include "plpfuse.h"
#include "rfsv_api.h"
/* Name of our extended attribute */
#define XATTR_NAME "user.epoc"
/* Maximum length of a generated psion xattr string */
#define XATTR_MAXLEN 3
int debug;
int
debuglog(char *fmt, ...)
{
va_list ap;
char *buf;
if (!debug)
return 0;
va_start(ap, fmt);
vasprintf(&buf, fmt, ap);
syslog(LOG_DEBUG, "%s", buf);
free(buf);
va_end(ap);
return 0;
}
static void
xattr2pattr(long *psisattr, long *psidattr, const char *oxattr, const char *nxattr)
{
if ((strchr(oxattr, 'a') == NULL) != (strchr(nxattr, 'a') == NULL)) { /* a = archive */
if (strchr(nxattr, 'a'))
*psisattr |= PSI_A_ARCHIVE;
else
*psidattr |= PSI_A_ARCHIVE;
}
if ((strchr(oxattr, 'h') == NULL) != (strchr(nxattr, 'h') == NULL)) { /* h = hidden */
if (strchr(nxattr, 'h'))
*psisattr |= PSI_A_HIDDEN;
else
*psidattr |= PSI_A_HIDDEN;
}
if ((strchr(oxattr, 's') == NULL) != (strchr(nxattr, 's') == NULL)) { /* s = system */
if (strchr(nxattr, 's'))
*psisattr |= PSI_A_SYSTEM;
else
*psidattr |= PSI_A_SYSTEM;
}
}
static void
attr2pattr(long oattr, long nattr, char *oxattr, char *nxattr, long *psisattr, long *psidattr)
{
*psisattr = *psidattr = 0;
if ((oattr & 0400) != (nattr & 0400)) {
if (nattr & 0400) /* readable */
*psisattr |= PSI_A_READ;
else
*psidattr |= PSI_A_READ;
}
if ((oattr & 0200) != (nattr & 0200)) {
if (nattr & 0200) /* Not writable -> readonly */
*psidattr |= PSI_A_RDONLY;
else
*psisattr |= PSI_A_RDONLY;
}
xattr2pattr(psisattr, psidattr, oxattr, nxattr);
}
static void
pattr2xattr(long psiattr, char *xattr)
{
*xattr = '\0';
if (psiattr & PSI_A_HIDDEN)
strcat(xattr, "h");
if (psiattr & PSI_A_SYSTEM)
strcat(xattr, "s");
if (psiattr & PSI_A_ARCHIVE)
strcat(xattr, "a");
}
static void
pattr2attr(long psiattr, long size, long ftime, struct stat *st, char *xattr)
{
struct fuse_context *ct = fuse_get_context();
memset(st, 0, sizeof(*st));
st->st_uid = ct->uid;
st->st_gid = ct->gid;
if (psiattr & PSI_A_DIR) {
st->st_mode = 0700 | S_IFDIR;
st->st_blocks = 1;
st->st_size = BLOCKSIZE;
st->st_nlink = 2; /* Call getlinks for more accurate count */
} else {
st->st_blocks = (size + BLOCKSIZE - 1) / BLOCKSIZE;
st->st_size = size;
st->st_nlink = 1;
st->st_mode = S_IFREG;
if (psiattr & PSI_A_READ)
st->st_mode |= 0400; /* File readable */
if (!(psiattr & PSI_A_RDONLY))
st->st_mode |= 0200; /* File writeable */
}
st->st_mtime = st->st_ctime = st->st_atime = ftime;
pattr2xattr(psiattr, xattr);
}
static device *devices;
static int
query_devices(void)
{
device *dp, *np;
int link_count = 2; /* set the root link count */
for (dp = devices; dp; dp = np) {
np = dp->next;
free(dp->name);
free(dp);
}
devices = NULL;
if (rfsv_drivelist(&link_count, &devices))
return 1;
return 0;
}
static char *
dirname(const char *dir)
{
static char *namebuf = NULL;
if (namebuf)
free(namebuf);
asprintf(&namebuf, "%s\\", dir);
return namebuf;
}
static const char *
filname(const char *dir)
{
char *p;
if ((p = (char *) rindex(dir, '\\')))
return p + 1;
else
return dir;
}
static int
dircount(const char *path, long *count)
{
dentry *e = NULL;
long ret = 0;
*count = 0;
debuglog("dircount: %s", path);
debuglog("RFSV dir %s", path);
if ((ret = rfsv_dir(dirname(path), &e)) != 0)
return ret;
while (e) {
struct stat st;
dentry *o = e;
char xattr[XATTR_MAXLEN + 1];
pattr2attr(e->attr, e->size, e->time, &st, xattr);
free(e->name);
e = e->next;
free(o);
if (st.st_nlink > 1)
(*count)++;
}
debuglog("count %d", *count);
return ret;
}
static int getlinks(const char *path, struct stat *st)
{
long dcount;
int ret = dircount(path, &dcount);
if (ret == 0)
st->st_nlink = dcount + 2;
return ret;
}
static int plp_getattr(const char *path, struct stat *st)
{
char xattr[XATTR_MAXLEN + 1];
int ret = 0;
debuglog("plp_getattr `%s'", ++path);
if (strcmp(path, "") == 0) {
pattr2attr(PSI_A_DIR, 0, 0, st, xattr);
if (!query_devices()) {
device *dp;
for (dp = devices; dp; dp = dp->next)
st->st_nlink++;
debuglog("root has %d links", st->st_nlink);
} else
return rfsv_isalive() ? -ENOENT : -ENOMEDIUM;
} else {
long pattr, psize, ptime;
if (strlen(path) == 2 && path[1] == ':') {
debuglog("getattr: device");
if (!query_devices()) {
device *dp;
for (dp = devices; dp; dp = dp->next) {
debuglog("cmp '%c', '%c'", dp->letter,
path[0]);
if (dp->letter == path[0])
break;
}
debuglog("device: %s", dp ? "exists" : "does not exist");
pattr2attr(PSI_A_DIR, 0, 0, st, xattr);
return getlinks(path, st);
} else
return rfsv_isalive() ? -ENOENT : -ENOMEDIUM;
}
debuglog("getattr: fileordir");
if ((ret = rfsv_getattr(path, &pattr, &psize, &ptime)) == 0) {
pattr2attr(pattr, psize, ptime, st, xattr);
debuglog(" attrs Psion: %x %d %d, UNIX modes: %o, xattrs: %s", pattr, psize, ptime, st->st_mode, xattr);
if (st->st_nlink > 1)
ret = getlinks(path, st);
}
}
debuglog("getattr: returned %d", ret);
return ret;
}
static int plp_access(const char *path, int mask)
{
(void)mask;
debuglog("plp_access `%s'", ++path);
return 0;
}
static int plp_readlink(const char *path, char *buf, size_t size)
{
(void)buf;
(void)size;
debuglog("plp_readlink `%s'", ++path);
return -EINVAL;
}
static int plp_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
device *dp;
dentry *e = NULL;
char xattr[XATTR_MAXLEN + 1];
debuglog("plp_readdir `%s'", ++path);
(void)offset;
(void)fi;
if (strcmp(path, "") == 0) {
debuglog("readdir root");
if (query_devices() == 0) {
for (dp = devices; dp; dp = dp->next) {
struct stat st;
unsigned char name[3];
name[0] = dp->letter;
name[1] = ':';
name[2] = '\0';
pattr2attr(dp->attrib, 1, 0, &st, xattr);
if (filler(buf, (char *)name, &st, 0))
break;
}
}
} else {
int ret;
debuglog("RFSV dir `%s'", dirname(path));
if ((ret = rfsv_dir(dirname(path), &e)) != 0)
return ret;
debuglog("scanning contents");
while (e) {
dentry *o;
struct stat st;
const char *name = filname(e->name);
pattr2attr(e->attr, e->size, e->time, &st, xattr);
debuglog(" %s %o %d %d", name, st.st_mode, st.st_size, st.st_mtime);
if (filler(buf, name, &st, 0))
break;
free(e->name);
o = e;
e = e->next;
free(o);
}
}
debuglog("readdir OK");
return 0;
}
static int plp_mknod(const char *path, mode_t mode, dev_t dev)
{
int ret = -EINVAL;
debuglog("plp_mknod `%s' %o", ++path, mode);
if (S_ISREG(mode) && dev == 0) {
u_int32_t phandle;
if ((ret = rfsv_fcreate(0x200, path, &phandle)) == 0)
rfsv_fclose(phandle);
}
return ret;
}
static int plp_mkdir(const char *path, mode_t mode)
{
debuglog("plp_mkdir `%s' %o", ++path, mode);
return rfsv_mkdir(path);
}
static int plp_unlink(const char *path)
{
debuglog("plp_unlink `%s'", ++path);
return rfsv_remove(path);
}
static int plp_rmdir(const char *path)
{
debuglog("plp_rmdir `%s'", ++path);
return rfsv_rmdir(path);
}
static int plp_symlink(const char *from, const char *to)
{
debuglog("plp_symlink `%s' -> `'%s'", ++from, ++to);
return -EPERM;
}
static int plp_rename(const char *from, const char *to)
{
debuglog("plp_rename `%s' -> `%s'", ++from, ++to);
rfsv_remove(to);
return rfsv_rename(from, to);
}
static int plp_link(const char *from, const char *to)
{
debuglog("plp_link `%s' -> `%s'", ++from, ++to);
return -EPERM;
}
static int plp_chmod(const char *path, mode_t mode)
{
int ret;
long psisattr, psidattr, pattr, psize, ptime;
struct stat st;
char xattr[XATTR_MAXLEN + 1];
debuglog("plp_chmod `%s'", ++path);
if ((ret = rfsv_getattr(path, &pattr, &psize, &ptime)) == 0) {
pattr2attr(pattr, psize, ptime, &st, xattr);
attr2pattr(st.st_mode, mode, "", "", &psisattr, &psidattr);
debuglog(" UNIX old, new: %o, %o; Psion set, clear: %x, %x", st.st_mode, mode, psisattr, psidattr);
if ((ret = rfsv_setattr(path, psisattr, psidattr)) == 0)
debuglog("chmod succeeded");
}
return ret;
}
static int plp_getxattr(const char *path, const char *name, char *value, size_t size)
{
debuglog("plp_getxattr `%s' %s", ++path, name);
if (strcmp(name, XATTR_NAME) == 0) {
if (size >= XATTR_MAXLEN) {
long pattr, psize, ptime;
int ret;
if ((ret = rfsv_getattr(path, &pattr, &psize, &ptime)) == 0) {
pattr2xattr(pattr, value);
debuglog("getxattr succeeded: %s", value);
return strlen(value);
} else
return ret;
} else {
debuglog("only gave %d bytes, need %d", size, XATTR_MAXLEN);
return XATTR_MAXLEN;
}
}
return 0;
}
static int plp_setxattr(const char *path, const char *name, const char *value, size_t size, int flags)
{
debuglog("plp_setxattr `%s'", ++path);
if (strcmp(name, XATTR_NAME) == 0) {
int ret;
long psisattr, psidattr;
char oxattr[XATTR_MAXLEN + 1], nxattr[XATTR_MAXLEN + 1];
if (flags & XATTR_CREATE)
return -EEXIST;
strncpy(nxattr, value, size < XATTR_MAXLEN ? size : XATTR_MAXLEN);
nxattr[XATTR_MAXLEN] = '\0';
/* Need to undo earlier increment of path when calling plp_getxattr */
plp_getxattr(path - 1, name, oxattr, XATTR_MAXLEN);
psisattr = psidattr = 0;
xattr2pattr(&psisattr, &psidattr, oxattr, value);
debuglog("attrs set %x delete %x; %s, %s", psisattr, psidattr, oxattr, value);
if ((ret = rfsv_setattr(path, psisattr, psidattr)) != 0)
return ret;
debuglog("setxattr succeeded");
return 0;
} else {
if (flags & XATTR_REPLACE)
return -ENOATTR;
else
return -ENOTSUP;
}
}
static int plp_listxattr(const char *path, char *list, size_t size)
{
debuglog("plp_listxattr `%s'", ++path);
if (size > sizeof(XATTR_NAME))
strcpy(list, XATTR_NAME);
return sizeof(XATTR_NAME);
}
static int plp_removexattr(const char *path, const char *name)
{
debuglog("plp_removexattr `%s'", ++path);
(void)name;
return -ENOTSUP;
}
static int plp_chown(const char *path, uid_t uid, gid_t gid)
{
(void)uid;
(void)gid;
debuglog("plp_chown `%s'", ++path);
return -EPERM;
}
static int plp_truncate(const char *path, off_t size)
{
debuglog("plp_truncate `%s'", ++path);
return rfsv_setsize(path, size);
}
static int plp_utimens(const char *path, const struct timespec ts[2])
{
debuglog("plp_utimens `%s'", ++path);
return rfsv_setmtime(path, ts[1].tv_sec);
}
static int plp_open(const char *path, struct fuse_file_info *fi)
{
debuglog("plp_open `%s'", ++path);
(void)fi;
return 0;
}
static int plp_read(const char *path, char *buf, size_t size, off_t offset,
struct fuse_file_info *fi)
{
long read;
(void)fi;
debuglog("plp_read `%s' offset %lld size %ld", ++path, offset, size);
read = rfsv_read(buf, (long)offset, size, path);
debuglog("read returned %ld", read);
return read;
}
static int plp_write(const char *path, const char *buf, size_t size,
off_t offset, struct fuse_file_info *fi)
{
long written;
(void)fi;
debuglog("plp_write `%s' offset %lld size %ld", ++path, offset, size);
written = rfsv_write(buf, offset, size, path);
debuglog("write returned %ld", written);
return written;
}
static int plp_statfs(const char *path, struct statvfs *stbuf)
{
device *dp;
(void)path;
debuglog("plp_statfs");
stbuf->f_bsize = BLOCKSIZE;
stbuf->f_frsize = BLOCKSIZE;
if (query_devices() == 0) {
for (dp = devices; dp; dp = dp->next) {
stbuf->f_blocks += (dp->total + BLOCKSIZE - 1) / BLOCKSIZE;
stbuf->f_bfree += (dp->free + BLOCKSIZE - 1) / BLOCKSIZE;
}
}
stbuf->f_bavail = stbuf->f_bfree;
/* Don't have numbers for these */
stbuf->f_files = 0;
stbuf->f_ffree = stbuf->f_favail = 0;
stbuf->f_fsid = FID;
stbuf->f_flag = 0; /* don't have mount flags */
stbuf->f_namemax = 255; /* KDMaxFileNameLen% */
return 0;
}
struct fuse_operations plp_oper = {
.getattr = plp_getattr,
.access = plp_access,
.readlink = plp_readlink,
.readdir = plp_readdir,
.mknod = plp_mknod,
.mkdir = plp_mkdir,
.symlink = plp_symlink,
.unlink = plp_unlink,
.rmdir = plp_rmdir,
.rename = plp_rename,
.link = plp_link,
.chmod = plp_chmod,
.setxattr = plp_setxattr,
.getxattr = plp_getxattr,
.listxattr = plp_listxattr,
.removexattr = plp_removexattr,
.chown = plp_chown,
.truncate = plp_truncate,
.utimens = plp_utimens,
.open = plp_open,
.read = plp_read,
.write = plp_write,
.statfs = plp_statfs,
};
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