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ntfs-3g/src/ntfs-3g.c

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/**
* ntfs-3g - Third Generation NTFS Driver
*
* Copyright (c) 2005-2006 Yura Pakhuchiy
* Copyright (c) 2005 Yuval Fledel
* Copyright (c) 2006-2007 Szabolcs Szakacsits
*
* This file is originated from the Linux-NTFS project.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program (in the main directory of the NTFS-3G
* distribution in the file COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <fuse.h>
#if !defined(FUSE_VERSION) || (FUSE_VERSION < 26)
#error "***********************************************************"
#error "* *"
#error "* Compilation requires at least FUSE version 2.6.0! *"
#error "* *"
#error "***********************************************************"
#endif
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
#include <signal.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#include <getopt.h>
#include <syslog.h>
#include <sys/wait.h>
#ifdef HAVE_SETXATTR
#include <sys/xattr.h>
#endif
#include "attrib.h"
#include "inode.h"
#include "volume.h"
#include "dir.h"
#include "unistr.h"
#include "layout.h"
#include "index.h"
#include "utils.h"
#include "version.h"
#include "ntfstime.h"
#include "misc.h"
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
typedef enum {
FSTYPE_NONE,
FSTYPE_UNKNOWN,
FSTYPE_FUSE,
FSTYPE_FUSEBLK
} fuse_fstype;
typedef struct {
fuse_fill_dir_t filler;
void *buf;
} ntfs_fuse_fill_context_t;
typedef enum {
NF_STREAMS_INTERFACE_NONE, /* No access to named data streams. */
NF_STREAMS_INTERFACE_XATTR, /* Map named data streams to xattrs. */
NF_STREAMS_INTERFACE_WINDOWS, /* "file:stream" interface. */
} ntfs_fuse_streams_interface;
typedef struct {
ntfs_volume *vol;
int state;
long free_clusters;
long free_mft;
unsigned int uid;
unsigned int gid;
unsigned int fmask;
unsigned int dmask;
ntfs_fuse_streams_interface streams;
BOOL ro;
BOOL show_sys_files;
BOOL silent;
BOOL force;
BOOL debug;
BOOL noatime;
BOOL no_detach;
} ntfs_fuse_context_t;
typedef enum {
NF_FreeClustersOutdate = (1 << 0), /* Information about amount of
free clusters is outdated. */
NF_FreeMFTOutdate = (1 << 1), /* Information about amount of
free MFT records is outdated. */
} ntfs_fuse_state_bits;
static struct options {
char *mnt_point; /* Mount point */
char *options; /* Mount options */
char *device; /* Device to mount */
} opts;
static const char *EXEC_NAME = "ntfs-3g";
static char def_opts[] = "silent,allow_other,nonempty,";
static ntfs_fuse_context_t *ctx;
static u32 ntfs_sequence;
static const char *locale_msg =
"WARNING: Couldn't set locale to '%s' thus some file names may not\n"
" be correct or visible. Please see the potential solution at\n"
" http://ntfs-3g.org/support.html#locale\n";
static const char *dev_fuse_msg =
"HINT: You should be root, or make ntfs-3g setuid root, or load the FUSE\n"
" kernel module as root (modprobe fuse) and make sure /dev/fuse exist.\n";
static const char *usage_msg =
"\n"
"%s %s - Third Generation NTFS Driver\n"
"\n"
"Copyright (C) 2005-2006 Yura Pakhuchiy\n"
"Copyright (C) 2006-2007 Szabolcs Szakacsits\n"
"\n"
"Usage: %s <device|image_file> <mount_point> [-o option[,...]]\n"
"\n"
"Options: ro, force, locale=, uid=, gid=, umask=, fmask=, dmask=,\n"
" streams_interface=. Please see details in the manual.\n"
"\n"
"Example: ntfs-3g /dev/sda1 /mnt/win -o force,locale=en_EN.UTF-8\n"
"\n"
"%s";
static __inline__ void ntfs_fuse_mark_free_space_outdated(void)
{
/* Mark information about free MFT record and clusters outdated. */
ctx->state |= (NF_FreeClustersOutdate | NF_FreeMFTOutdate);
}
/**
* ntfs_fuse_is_named_data_stream - check path to be to named data stream
* @path: path to check
*
* Returns 1 if path is to named data stream or 0 otherwise.
*/
static __inline__ int ntfs_fuse_is_named_data_stream(const char *path)
{
if (strchr(path, ':') && ctx->streams == NF_STREAMS_INTERFACE_WINDOWS)
return 1;
return 0;
}
static long ntfs_fuse_get_nr_free_mft_records(ntfs_volume *vol, s64 numof_inode)
{
u8 *buf;
long nr_free = 0;
s64 br, total = 0;
if (!(ctx->state & NF_FreeMFTOutdate))
return ctx->free_mft;
buf = ntfs_malloc(vol->cluster_size);
if (!buf)
return -errno;
while (1) {
int i, j;
br = ntfs_attr_pread(vol->mftbmp_na, total,
vol->cluster_size, buf);
if (br <= 0)
break;
total += br;
for (i = 0; i < br; i++)
for (j = 0; j < 8; j++) {
if (--numof_inode < 0)
break;
if (!((buf[i] >> j) & 1))
nr_free++;
}
}
free(buf);
if (!total || br < 0)
return -errno;
ctx->free_mft = nr_free;
ctx->state &= ~(NF_FreeMFTOutdate);
return nr_free;
}
static long ntfs_fuse_get_nr_free_clusters(ntfs_volume *vol)
{
u8 *buf;
long nr_free = 0;
s64 br, total = 0;
if (!(ctx->state & NF_FreeClustersOutdate))
return ctx->free_clusters;
buf = ntfs_malloc(vol->cluster_size);
if (!buf)
return -errno;
while (1) {
int i, j;
br = ntfs_attr_pread(vol->lcnbmp_na, total,
vol->cluster_size, buf);
if (br <= 0)
break;
total += br;
for (i = 0; i < br; i++)
for (j = 0; j < 8; j++)
if (!((buf[i] >> j) & 1))
nr_free++;
}
free(buf);
if (!total || br < 0)
return -errno;
ctx->free_clusters = nr_free;
ctx->state &= ~(NF_FreeClustersOutdate);
return nr_free;
}
/**
* ntfs_fuse_statfs - return information about mounted NTFS volume
* @path: ignored (but fuse requires it)
* @sfs: statfs structure in which to return the information
*
* Return information about the mounted NTFS volume @sb in the statfs structure
* pointed to by @sfs (this is initialized with zeros before ntfs_statfs is
* called). We interpret the values to be correct of the moment in time at
* which we are called. Most values are variable otherwise and this isn't just
* the free values but the totals as well. For example we can increase the
* total number of file nodes if we run out and we can keep doing this until
* there is no more space on the volume left at all.
*
* This code based on ntfs_statfs from ntfs kernel driver.
*
* Returns 0 on success or -errno on error.
*/
static int ntfs_fuse_statfs(const char *path __attribute__((unused)),
struct statvfs *sfs)
{
long size, delta_bits;
u64 allocated_inodes;
ntfs_volume *vol;
vol = ctx->vol;
if (!vol)
return -ENODEV;
/* Optimal transfer block size. */
sfs->f_bsize = vol->cluster_size;
sfs->f_frsize = vol->cluster_size;
/*
* Total data blocks in file system in units of f_bsize and since
* inodes are also stored in data blocs ($MFT is a file) this is just
* the total clusters.
*/
sfs->f_blocks = vol->nr_clusters;
/* Free data blocks in file system in units of f_bsize. */
size = ntfs_fuse_get_nr_free_clusters(vol);
if (size < 0)
size = 0;
/* Free blocks avail to non-superuser, same as above on NTFS. */
sfs->f_bavail = sfs->f_bfree = size;
/* Free inodes on the free space */
delta_bits = vol->cluster_size_bits - vol->mft_record_size_bits;
if (delta_bits >= 0)
size <<= delta_bits;
else
size >>= -delta_bits;
/* Number of inodes in file system (at this point in time). */
allocated_inodes = vol->mft_na->data_size >> vol->mft_record_size_bits;
sfs->f_files = allocated_inodes + size;
/* Free inodes in fs (based on current total count). */
size = ntfs_fuse_get_nr_free_mft_records(vol, allocated_inodes) + size;
if (size < 0)
size = 0;
sfs->f_ffree = size;
sfs->f_favail = 0;
/* Maximum length of filenames. */
sfs->f_namemax = NTFS_MAX_NAME_LEN;
return 0;
}
/**
* ntfs_fuse_parse_path - split path to path and stream name.
* @org_path: path to split
* @path: pointer to buffer in which parsed path saved
* @stream_name: pointer to buffer where stream name in unicode saved
*
* This function allocates buffers for @*path and @*stream, user must free them
* after use.
*
* Return values:
* <0 Error occurred, return -errno;
* 0 No stream name, @*stream is not allocated and set to AT_UNNAMED.
* >0 Stream name length in unicode characters.
*/
static int ntfs_fuse_parse_path(const char *org_path, char **path,
ntfschar **stream_name)
{
char *stream_name_mbs;
int res;
stream_name_mbs = strdup(org_path);
if (!stream_name_mbs)
return -errno;
if (ctx->streams == NF_STREAMS_INTERFACE_WINDOWS) {
*path = strsep(&stream_name_mbs, ":");
if (stream_name_mbs) {
*stream_name = NULL;
res = ntfs_mbstoucs(stream_name_mbs, stream_name, 0);
if (res < 0)
return -errno;
return res;
}
} else
*path = stream_name_mbs;
*stream_name = AT_UNNAMED;
return 0;
}
static void set_fuse_error(int *err)
{
if (!*err)
*err = -errno;
}
static int ntfs_fuse_getattr(const char *org_path, struct stat *stbuf)
{
int res = 0;
ntfs_inode *ni;
ntfs_attr *na;
ntfs_volume *vol;
char *path = NULL;
ntfschar *stream_name;
int stream_name_len;
vol = ctx->vol;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
memset(stbuf, 0, sizeof(struct stat));
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni) {
res = -errno;
goto exit;
}
if (ni->mrec->flags & MFT_RECORD_IS_DIRECTORY && !stream_name_len) {
/* Directory. */
stbuf->st_mode = S_IFDIR | (0777 & ~ctx->dmask);
na = ntfs_attr_open(ni, AT_INDEX_ALLOCATION, NTFS_INDEX_I30, 4);
if (na) {
stbuf->st_size = na->data_size;
stbuf->st_blocks = na->allocated_size >> 9;
ntfs_attr_close(na);
}
stbuf->st_nlink = 1; /* Make find(1) work */
} else {
/* Regular or Interix (INTX) file. */
stbuf->st_mode = S_IFREG;
stbuf->st_size = ni->data_size;
/*
* Temporary fix to make ActiveSync work via Samba 3.0.
* See more on the ntfs-3g-devel list.
*/
stbuf->st_blocks = (ni->allocated_size + 511) >> 9;
stbuf->st_nlink = le16_to_cpu(ni->mrec->link_count);
if (ni->flags & FILE_ATTR_SYSTEM || stream_name_len) {
na = ntfs_attr_open(ni, AT_DATA, stream_name,
stream_name_len);
if (!na) {
if (stream_name_len)
res = -ENOENT;
goto exit;
}
if (stream_name_len) {
stbuf->st_size = na->data_size;
stbuf->st_blocks = na->allocated_size >> 9;
}
/* Check whether it's Interix FIFO or socket. */
if (!(ni->flags & FILE_ATTR_HIDDEN) &&
!stream_name_len) {
/* FIFO. */
if (na->data_size == 0)
stbuf->st_mode = S_IFIFO;
/* Socket link. */
if (na->data_size == 1)
stbuf->st_mode = S_IFSOCK;
}
/*
* Check whether it's Interix symbolic link, block or
* character device.
*/
if (na->data_size <= sizeof(INTX_FILE_TYPES) + sizeof(
ntfschar) * MAX_PATH && na->data_size >
sizeof(INTX_FILE_TYPES) &&
!stream_name_len) {
INTX_FILE *intx_file;
intx_file = ntfs_malloc(na->data_size);
if (!intx_file) {
res = -errno;
ntfs_attr_close(na);
goto exit;
}
if (ntfs_attr_pread(na, 0, na->data_size,
intx_file) != na->data_size) {
res = -errno;
free(intx_file);
ntfs_attr_close(na);
goto exit;
}
if (intx_file->magic == INTX_BLOCK_DEVICE &&
na->data_size == offsetof(
INTX_FILE, device_end)) {
stbuf->st_mode = S_IFBLK;
stbuf->st_rdev = makedev(le64_to_cpu(
intx_file->major),
le64_to_cpu(
intx_file->minor));
}
if (intx_file->magic == INTX_CHARACTER_DEVICE &&
na->data_size == offsetof(
INTX_FILE, device_end)) {
stbuf->st_mode = S_IFCHR;
stbuf->st_rdev = makedev(le64_to_cpu(
intx_file->major),
le64_to_cpu(
intx_file->minor));
}
if (intx_file->magic == INTX_SYMBOLIC_LINK)
stbuf->st_mode = S_IFLNK;
free(intx_file);
}
ntfs_attr_close(na);
}
stbuf->st_mode |= (0777 & ~ctx->fmask);
}
stbuf->st_uid = ctx->uid;
stbuf->st_gid = ctx->gid;
stbuf->st_ino = ni->mft_no;
stbuf->st_atime = ni->last_access_time;
stbuf->st_ctime = ni->last_mft_change_time;
stbuf->st_mtime = ni->last_data_change_time;
exit:
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_readlink(const char *org_path, char *buf, size_t buf_size)
{
char *path;
ntfschar *stream_name;
ntfs_inode *ni = NULL;
ntfs_attr *na = NULL;
INTX_FILE *intx_file = NULL;
int stream_name_len, res = 0;
/* Get inode. */
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
if (stream_name_len > 0) {
res = -EINVAL;
goto exit;
}
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni) {
res = -errno;
goto exit;
}
/* Sanity checks. */
if (!(ni->flags & FILE_ATTR_SYSTEM)) {
res = -EINVAL;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
if (!na) {
res = -errno;
goto exit;
}
if (na->data_size <= sizeof(INTX_FILE_TYPES)) {
res = -EINVAL;
goto exit;
}
if (na->data_size > sizeof(INTX_FILE_TYPES) +
sizeof(ntfschar) * MAX_PATH) {
res = -ENAMETOOLONG;
goto exit;
}
/* Receive file content. */
intx_file = ntfs_malloc(na->data_size);
if (!intx_file) {
res = -errno;
goto exit;
}
if (ntfs_attr_pread(na, 0, na->data_size, intx_file) != na->data_size) {
res = -errno;
goto exit;
}
/* Sanity check. */
if (intx_file->magic != INTX_SYMBOLIC_LINK) {
res = -EINVAL;
goto exit;
}
/* Convert link from unicode to local encoding. */
if (ntfs_ucstombs(intx_file->target, (na->data_size -
offsetof(INTX_FILE, target)) / sizeof(ntfschar),
&buf, buf_size) < 0) {
res = -errno;
goto exit;
}
exit:
if (intx_file)
free(intx_file);
if (na)
ntfs_attr_close(na);
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_filler(ntfs_fuse_fill_context_t *fill_ctx,
const ntfschar *name, const int name_len, const int name_type,
const s64 pos __attribute__((unused)), const MFT_REF mref,
const unsigned dt_type __attribute__((unused)))
{
char *filename = NULL;
if (name_type == FILE_NAME_DOS)
return 0;
if (ntfs_ucstombs(name, name_len, &filename, 0) < 0) {
ntfs_log_perror("Skipping unrepresentable filename (inode %llu)",
(unsigned long long)MREF(mref));
return 0;
}
if (ntfs_fuse_is_named_data_stream(filename)) {
ntfs_log_error("Unable to access '%s' (inode %llu) with "
"current named streams access interface.\n",
filename, (unsigned long long)MREF(mref));
free(filename);
return 0;
}
if (MREF(mref) == FILE_root || MREF(mref) >= FILE_first_user ||
ctx->show_sys_files) {
struct stat st = { .st_ino = MREF(mref) };
fill_ctx->filler(fill_ctx->buf, filename, &st, 0);
}
free(filename);
return 0;
}
static int ntfs_fuse_readdir(const char *path, void *buf,
fuse_fill_dir_t filler, off_t offset __attribute__((unused)),
struct fuse_file_info *fi __attribute__((unused)))
{
ntfs_fuse_fill_context_t fill_ctx;
ntfs_volume *vol;
ntfs_inode *ni;
s64 pos = 0;
int err = 0;
vol = ctx->vol;
fill_ctx.filler = filler;
fill_ctx.buf = buf;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
if (ntfs_readdir(ni, &pos, &fill_ctx,
(ntfs_filldir_t)ntfs_fuse_filler))
err = -errno;
if (ntfs_inode_close(ni))
set_fuse_error(&err);
return err;
}
static int ntfs_fuse_open(const char *org_path,
struct fuse_file_info *fi __attribute__((unused)))
{
ntfs_volume *vol;
ntfs_inode *ni;
ntfs_attr *na;
int res = 0;
char *path = NULL;
ntfschar *stream_name;
int stream_name_len;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
vol = ctx->vol;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (ni) {
na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
if (na) {
if (NAttrEncrypted(na))
res = -EACCES;
ntfs_attr_close(na);
} else
res = -errno;
if (ntfs_inode_close(ni))
set_fuse_error(&res);
} else
res = -errno;
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_read(const char *org_path, char *buf, size_t size,
off_t offset, struct fuse_file_info *fi __attribute__((unused)))
{
ntfs_volume *vol;
ntfs_inode *ni = NULL;
ntfs_attr *na = NULL;
char *path = NULL;
ntfschar *stream_name;
int stream_name_len, res, total = 0;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
vol = ctx->vol;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni) {
res = -errno;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
if (!na) {
res = -errno;
goto exit;
}
if (offset + size > na->data_size)
size = na->data_size - offset;
while (size) {
res = ntfs_attr_pread(na, offset, size, buf);
if (res < (s64)size)
ntfs_log_perror("ntfs_attr_pread partial write (%lld: "
"%lld <> %d)", (s64)offset, (s64)size, res);
if (res <= 0) {
res = -errno;
goto exit;
}
size -= res;
offset += res;
total += res;
}
res = total;
exit:
if (na)
ntfs_attr_close(na);
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_write(const char *org_path, const char *buf, size_t size,
off_t offset, struct fuse_file_info *fi __attribute__((unused)))
{
ntfs_volume *vol;
ntfs_inode *ni = NULL;
ntfs_attr *na = NULL;
char *path = NULL;
ntfschar *stream_name;
int stream_name_len, res, total = 0;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0) {
res = stream_name_len;
goto out;
}
vol = ctx->vol;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni) {
res = -errno;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
if (!na) {
res = -errno;
goto exit;
}
while (size) {
res = ntfs_attr_pwrite(na, offset, size, buf);
if (res < (s64)size)
ntfs_log_perror("ntfs_attr_pwrite partial write (%lld: "
"%lld <> %d)", (s64)offset, (s64)size, res);
if (res <= 0) {
res = -errno;
goto exit;
}
size -= res;
offset += res;
total += res;
}
res = total;
exit:
ntfs_fuse_mark_free_space_outdated();
if (na)
ntfs_attr_close(na);
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(path);
if (stream_name_len)
free(stream_name);
out:
return res;
}
static int ntfs_fuse_truncate(const char *org_path, off_t size)
{
ntfs_volume *vol;
ntfs_inode *ni = NULL;
ntfs_attr *na;
int res;
char *path = NULL;
ntfschar *stream_name;
int stream_name_len;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
vol = ctx->vol;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
goto exit;
na = ntfs_attr_open(ni, AT_DATA, stream_name, stream_name_len);
if (!na)
goto exit;
if (ntfs_attr_truncate(na, size))
goto exit;
ntfs_fuse_mark_free_space_outdated();
ntfs_attr_close(na);
errno = 0;
exit:
res = -errno;
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_chmod(const char *path,
mode_t mode __attribute__((unused)))
{
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL; /* n/a for named data streams. */
if (ctx->silent)
return 0;
return -EOPNOTSUPP;
}
static int ntfs_fuse_chown(const char *path, uid_t uid, gid_t gid)
{
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL; /* n/a for named data streams. */
if (ctx->silent)
return 0;
if (uid == ctx->uid && gid == ctx->gid)
return 0;
return -EOPNOTSUPP;
}
static int ntfs_fuse_create(const char *org_path, dev_t type, dev_t dev,
const char *target)
{
char *name;
ntfschar *uname = NULL, *utarget = NULL;
ntfs_inode *dir_ni = NULL, *ni;
char *path;
int res = 0, uname_len, utarget_len;
path = strdup(org_path);
if (!path)
return -errno;
/* Generate unicode filename. */
name = strrchr(path, '/');
name++;
uname_len = ntfs_mbstoucs(name, &uname, 0);
if (uname_len < 0) {
res = -errno;
goto exit;
}
/* Open parent directory. */
*name = 0;
dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!dir_ni) {
res = -errno;
goto exit;
}
/* Create object specified in @type. */
switch (type) {
case S_IFCHR:
case S_IFBLK:
ni = ntfs_create_device(dir_ni, uname, uname_len, type,
dev);
break;
case S_IFLNK:
utarget_len = ntfs_mbstoucs(target, &utarget, 0);
if (utarget_len < 0) {
res = -errno;
goto exit;
}
ni = ntfs_create_symlink(dir_ni, uname, uname_len,
utarget, utarget_len);
break;
default:
ni = ntfs_create(dir_ni, uname, uname_len, type);
break;
}
if (ni) {
if (ntfs_inode_close(ni))
set_fuse_error(&res);
} else
res = -errno;
exit:
free(uname);
if (dir_ni && ntfs_inode_close(dir_ni))
set_fuse_error(&res);
if (utarget)
free(utarget);
free(path);
return res;
}
static int ntfs_fuse_create_stream(const char *path,
ntfschar *stream_name, const int stream_name_len)
{
ntfs_inode *ni;
int res = 0;
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni) {
res = -errno;
if (res == -ENOENT) {
/*
* If such file does not exist, create it and try once
* again to add stream to it.
*/
res = ntfs_fuse_create(path, S_IFREG, 0, NULL);
if (!res)
return ntfs_fuse_create_stream(path,
stream_name, stream_name_len);
else
res = -errno;
}
return res;
}
if (ntfs_attr_add(ni, AT_DATA, stream_name, stream_name_len, NULL, 0))
res = -errno;
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
static int ntfs_fuse_mknod(const char *org_path, mode_t mode, dev_t dev)
{
char *path = NULL;
ntfschar *stream_name;
int stream_name_len;
int res = 0;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
if (stream_name_len && !S_ISREG(mode)) {
res = -EINVAL;
goto exit;
}
if (!stream_name_len)
res = ntfs_fuse_create(path, mode & S_IFMT, dev, NULL);
else
res = ntfs_fuse_create_stream(path, stream_name,
stream_name_len);
ntfs_fuse_mark_free_space_outdated();
exit:
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_symlink(const char *to, const char *from)
{
if (ntfs_fuse_is_named_data_stream(from))
return -EINVAL; /* n/a for named data streams. */
ntfs_fuse_mark_free_space_outdated();
return ntfs_fuse_create(from, S_IFLNK, 0, to);
}
static int ntfs_fuse_link(const char *old_path, const char *new_path)
{
char *name;
ntfschar *uname = NULL;
ntfs_inode *dir_ni = NULL, *ni;
char *path;
int res = 0, uname_len;
if (ntfs_fuse_is_named_data_stream(old_path))
return -EINVAL; /* n/a for named data streams. */
if (ntfs_fuse_is_named_data_stream(new_path))
return -EINVAL; /* n/a for named data streams. */
path = strdup(new_path);
if (!path)
return -errno;
/* Open file for which create hard link. */
ni = ntfs_pathname_to_inode(ctx->vol, NULL, old_path);
if (!ni) {
res = -errno;
goto exit;
}
/* Generate unicode filename. */
name = strrchr(path, '/');
name++;
uname_len = ntfs_mbstoucs(name, &uname, 0);
if (uname_len < 0) {
res = -errno;
goto exit;
}
/* Open parent directory. */
*name = 0;
dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!dir_ni) {
res = -errno;
goto exit;
}
ntfs_fuse_mark_free_space_outdated();
/* Create hard link. */
if (ntfs_link(ni, dir_ni, uname, uname_len))
res = -errno;
exit:
/*
* Must close dir_ni first otherwise ntfs_inode_sync_file_name(ni)
* may fail because ni may not be in parent's index on the disk yet.
*/
if (dir_ni && ntfs_inode_close(dir_ni))
set_fuse_error(&res);
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(uname);
free(path);
return res;
}
static int ntfs_fuse_rm(const char *org_path)
{
char *name;
ntfschar *uname = NULL;
ntfs_inode *dir_ni = NULL, *ni;
char *path;
int res = 0, uname_len;
path = strdup(org_path);
if (!path)
return -errno;
/* Open object for delete. */
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni) {
res = -errno;
goto exit;
}
/* Generate unicode filename. */
name = strrchr(path, '/');
name++;
uname_len = ntfs_mbstoucs(name, &uname, 0);
if (uname_len < 0) {
res = -errno;
goto exit;
}
/* Open parent directory. */
*name = 0;
dir_ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!dir_ni) {
res = -errno;
goto exit;
}
/* Delete object. */
if (ntfs_delete(ni, dir_ni, uname, uname_len))
res = -errno;
ni = NULL;
exit:
if (ni && ntfs_inode_close(ni))
set_fuse_error(&res);
free(uname);
if (dir_ni && ntfs_inode_close(dir_ni))
set_fuse_error(&res);
free(path);
return res;
}
static int ntfs_fuse_rm_stream(const char *path, ntfschar *stream_name,
const int stream_name_len)
{
ntfs_inode *ni;
int res = 0;
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni)
return -errno;
if (ntfs_attr_remove(ni, AT_DATA, stream_name, stream_name_len))
res = -errno;
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
static int ntfs_fuse_unlink(const char *org_path)
{
char *path = NULL;
ntfschar *stream_name;
int stream_name_len;
int res = 0;
stream_name_len = ntfs_fuse_parse_path(org_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
if (!stream_name_len)
res = ntfs_fuse_rm(path);
else
res = ntfs_fuse_rm_stream(path, stream_name, stream_name_len);
ntfs_fuse_mark_free_space_outdated();
free(path);
if (stream_name_len)
free(stream_name);
return res;
}
static int ntfs_fuse_safe_rename(const char *old_path,
const char *new_path,
const char *tmp)
{
int ret;
ntfs_log_trace("Entering\n");
ret = ntfs_fuse_link(new_path, tmp);
if (ret)
return ret;
ret = ntfs_fuse_unlink(new_path);
if (!ret) {
ret = ntfs_fuse_link(old_path, new_path);
if (ret)
goto restore;
ret = ntfs_fuse_unlink(old_path);
if (ret) {
if (ntfs_fuse_unlink(new_path))
goto err;
goto restore;
}
}
goto cleanup;
restore:
if (ntfs_fuse_link(tmp, new_path)) {
err:
ntfs_log_perror("Rename failed. Existing file '%s' was renamed "
"to '%s'", new_path, tmp);
} else {
cleanup:
ntfs_fuse_unlink(tmp);
}
return ret;
}
static int ntfs_fuse_rename_existing_dest(const char *old_path, const char *new_path)
{
int ret, len;
char *tmp;
const char *ext = ".ntfs-3g-";
ntfs_log_trace("Entering\n");
len = strlen(new_path) + strlen(ext) + 10 + 1; /* wc(str(2^32)) + \0 */
tmp = ntfs_malloc(len);
if (!tmp)
return -errno;
ret = snprintf(tmp, len, "%s%s%010d", new_path, ext, ++ntfs_sequence);
if (ret != len - 1) {
ntfs_log_error("snprintf failed: %d != %d\n", ret, len - 1);
ret = -EOVERFLOW;
} else
ret = ntfs_fuse_safe_rename(old_path, new_path, tmp);
free(tmp);
return ret;
}
static int ntfs_fuse_rename(const char *old_path, const char *new_path)
{
int ret, stream_name_len;
char *path = NULL;
ntfschar *stream_name;
ntfs_inode *ni;
ntfs_log_debug("rename: old: '%s' new: '%s'\n", old_path, new_path);
/*
* FIXME: Rename should be atomic.
*/
stream_name_len = ntfs_fuse_parse_path(new_path, &path, &stream_name);
if (stream_name_len < 0)
return stream_name_len;
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (ni) {
ret = ntfs_check_empty_dir(ni);
if (ret < 0) {
ret = -errno;
ntfs_inode_close(ni);
goto out;
}
if (ntfs_inode_close(ni)) {
set_fuse_error(&ret);
goto out;
}
ret = ntfs_fuse_rename_existing_dest(old_path, new_path);
goto out;
}
ret = ntfs_fuse_link(old_path, new_path);
if (ret)
goto out;
ret = ntfs_fuse_unlink(old_path);
if (ret)
ntfs_fuse_unlink(new_path);
out:
free(path);
if (stream_name_len)
free(stream_name);
return ret;
}
static int ntfs_fuse_mkdir(const char *path,
mode_t mode __attribute__((unused)))
{
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL; /* n/a for named data streams. */
ntfs_fuse_mark_free_space_outdated();
return ntfs_fuse_create(path, S_IFDIR, 0, NULL);
}
static int ntfs_fuse_rmdir(const char *path)
{
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL; /* n/a for named data streams. */
ntfs_fuse_mark_free_space_outdated();
return ntfs_fuse_rm(path);
}
static int ntfs_fuse_utime(const char *path, struct utimbuf *buf)
{
ntfs_inode *ni;
int res = 0;
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL; /* n/a for named data streams. */
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni)
return -errno;
if (buf) {
ni->last_access_time = buf->actime;
ni->last_data_change_time = buf->modtime;
ni->last_mft_change_time = buf->modtime;
} else {
time_t now;
now = time(NULL);
ni->last_access_time = now;
ni->last_data_change_time = now;
ni->last_mft_change_time = now;
}
NInoFileNameSetDirty(ni);
NInoSetDirty(ni);
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
static int ntfs_fuse_bmap(const char *path, size_t blocksize, uint64_t *idx)
{
ntfs_inode *ni;
ntfs_attr *na;
LCN lcn;
int ret = 0;
int cl_per_bl = ctx->vol->cluster_size / blocksize;
if (blocksize > ctx->vol->cluster_size)
return -EINVAL;
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL;
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni)
return -errno;
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
if (!na) {
ret = -errno;
goto close_inode;
}
if (NAttrCompressed(na) || NAttrEncrypted(na) || !NAttrNonResident(na)){
ret = -EINVAL;
goto close_attr;
}
if (ntfs_attr_map_whole_runlist(na)) {
ret = -errno;
goto close_attr;
}
lcn = ntfs_rl_vcn_to_lcn(na->rl, *idx / cl_per_bl);
*idx = (lcn > 0) ? lcn * cl_per_bl + *idx % cl_per_bl : 0;
close_attr:
ntfs_attr_close(na);
close_inode:
if (ntfs_inode_close(ni))
set_fuse_error(&ret);
return ret;
}
#ifdef HAVE_SETXATTR
static const char nf_ns_xattr_preffix[] = "user.";
static const int nf_ns_xattr_preffix_len = 5;
static int ntfs_fuse_listxattr(const char *path, char *list, size_t size)
{
ntfs_attr_search_ctx *actx = NULL;
ntfs_volume *vol;
ntfs_inode *ni;
char *to = list;
int ret = 0;
if (ctx->streams != NF_STREAMS_INTERFACE_XATTR)
return -EOPNOTSUPP;
vol = ctx->vol;
if (!vol)
return -ENODEV;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
actx = ntfs_attr_get_search_ctx(ni, NULL);
if (!actx) {
ret = -errno;
ntfs_inode_close(ni);
goto exit;
}
while (!ntfs_attr_lookup(AT_DATA, NULL, 0, CASE_SENSITIVE,
0, NULL, 0, actx)) {
char *tmp_name = NULL;
int tmp_name_len;
if (!actx->attr->name_length)
continue;
tmp_name_len = ntfs_ucstombs((ntfschar *)((u8*)actx->attr +
le16_to_cpu(actx->attr->name_offset)),
actx->attr->name_length, &tmp_name, 0);
if (tmp_name_len < 0) {
ret = -errno;
goto exit;
}
ret += tmp_name_len + nf_ns_xattr_preffix_len + 1;
if (size) {
if ((size_t)ret <= size) {
strcpy(to, nf_ns_xattr_preffix);
to += nf_ns_xattr_preffix_len;
strncpy(to, tmp_name, tmp_name_len);
to += tmp_name_len;
*to = 0;
to++;
} else {
free(tmp_name);
ret = -ERANGE;
goto exit;
}
}
free(tmp_name);
}
if (errno != ENOENT)
ret = -errno;
exit:
if (actx)
ntfs_attr_put_search_ctx(actx);
if (ntfs_inode_close(ni))
set_fuse_error(&ret);
return ret;
}
static int ntfs_fuse_getxattr_windows(const char *path, const char *name,
char *value, size_t size)
{
ntfs_attr_search_ctx *actx = NULL;
ntfs_volume *vol;
ntfs_inode *ni;
char *to = value;
int ret = 0;
if (strcmp(name, "ntfs.streams.list"))
return -EOPNOTSUPP;
vol = ctx->vol;
if (!vol)
return -ENODEV;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
actx = ntfs_attr_get_search_ctx(ni, NULL);
if (!actx) {
ret = -errno;
ntfs_inode_close(ni);
goto exit;
}
while (!ntfs_attr_lookup(AT_DATA, NULL, 0, CASE_SENSITIVE,
0, NULL, 0, actx)) {
char *tmp_name = NULL;
int tmp_name_len;
if (!actx->attr->name_length)
continue;
tmp_name_len = ntfs_ucstombs((ntfschar *)((u8*)actx->attr +
le16_to_cpu(actx->attr->name_offset)),
actx->attr->name_length, &tmp_name, 0);
if (tmp_name_len < 0) {
ret = -errno;
goto exit;
}
if (ret)
ret++; /* For space delimiter. */
ret += tmp_name_len;
if (size) {
if ((size_t)ret <= size) {
/* Don't add space to the beginning of line. */
if (to != value) {
*to = ' ';
to++;
}
strncpy(to, tmp_name, tmp_name_len);
to += tmp_name_len;
} else {
free(tmp_name);
ret = -ERANGE;
goto exit;
}
}
free(tmp_name);
}
if (errno != ENOENT)
ret = -errno;
exit:
if (actx)
ntfs_attr_put_search_ctx(actx);
if (ntfs_inode_close(ni))
set_fuse_error(&ret);
return ret;
}
static int ntfs_fuse_getxattr(const char *path, const char *name,
char *value, size_t size)
{
ntfs_volume *vol;
ntfs_inode *ni;
ntfs_attr *na = NULL;
ntfschar *lename = NULL;
int res, lename_len;
if (ctx->streams == NF_STREAMS_INTERFACE_WINDOWS)
return ntfs_fuse_getxattr_windows(path, name, value, size);
if (ctx->streams != NF_STREAMS_INTERFACE_XATTR)
return -EOPNOTSUPP;
if (strncmp(name, nf_ns_xattr_preffix, nf_ns_xattr_preffix_len) ||
strlen(name) == (size_t)nf_ns_xattr_preffix_len)
return -ENODATA;
vol = ctx->vol;
if (!vol)
return -ENODEV;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
lename_len = ntfs_mbstoucs(name + nf_ns_xattr_preffix_len, &lename, 0);
if (lename_len == -1) {
res = -errno;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, lename, lename_len);
if (!na) {
res = -ENODATA;
goto exit;
}
if (size) {
if (size >= na->data_size) {
res = ntfs_attr_pread(na, 0, na->data_size, value);
if (res != na->data_size)
res = -errno;
} else
res = -ERANGE;
} else
res = na->data_size;
exit:
if (na)
ntfs_attr_close(na);
free(lename);
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
static int ntfs_fuse_setxattr(const char *path, const char *name,
const char *value, size_t size, int flags)
{
ntfs_volume *vol;
ntfs_inode *ni;
ntfs_attr *na = NULL;
ntfschar *lename = NULL;
int res, lename_len;
if (ctx->streams != NF_STREAMS_INTERFACE_XATTR)
return -EOPNOTSUPP;
if (strncmp(name, nf_ns_xattr_preffix, nf_ns_xattr_preffix_len) ||
strlen(name) == (size_t)nf_ns_xattr_preffix_len)
return -EACCES;
vol = ctx->vol;
if (!vol)
return -ENODEV;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
lename_len = ntfs_mbstoucs(name + nf_ns_xattr_preffix_len, &lename, 0);
if (lename_len == -1) {
res = -errno;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, lename, lename_len);
if (na && flags == XATTR_CREATE) {
res = -EEXIST;
goto exit;
}
ntfs_fuse_mark_free_space_outdated();
if (!na) {
if (flags == XATTR_REPLACE) {
res = -ENODATA;
goto exit;
}
if (ntfs_attr_add(ni, AT_DATA, lename, lename_len, NULL, 0)) {
res = -errno;
goto exit;
}
na = ntfs_attr_open(ni, AT_DATA, lename, lename_len);
if (!na) {
res = -errno;
goto exit;
}
}
res = ntfs_attr_pwrite(na, 0, size, value);
if (res != (s64) size)
res = -errno;
else
res = 0;
exit:
if (na)
ntfs_attr_close(na);
free(lename);
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
static int ntfs_fuse_removexattr(const char *path, const char *name)
{
ntfs_volume *vol;
ntfs_inode *ni;
ntfschar *lename = NULL;
int res = 0, lename_len;
if (ctx->streams != NF_STREAMS_INTERFACE_XATTR)
return -EOPNOTSUPP;
if (strncmp(name, nf_ns_xattr_preffix, nf_ns_xattr_preffix_len) ||
strlen(name) == (size_t)nf_ns_xattr_preffix_len)
return -ENODATA;
vol = ctx->vol;
if (!vol)
return -ENODEV;
ni = ntfs_pathname_to_inode(vol, NULL, path);
if (!ni)
return -errno;
lename_len = ntfs_mbstoucs(name + nf_ns_xattr_preffix_len, &lename, 0);
if (lename_len == -1) {
res = -errno;
goto exit;
}
if (ntfs_attr_remove(ni, AT_DATA, lename, lename_len)) {
if (errno == ENOENT)
errno = ENODATA;
res = -errno;
}
ntfs_fuse_mark_free_space_outdated();
exit:
free(lename);
if (ntfs_inode_close(ni))
set_fuse_error(&res);
return res;
}
#endif /* HAVE_SETXATTR */
static void ntfs_fuse_destroy(void)
{
if (!ctx)
return;
if (ctx->vol) {
ntfs_log_info("Unmounting %s (%s)\n", opts.device,
ctx->vol->vol_name);
if (ntfs_umount(ctx->vol, FALSE))
ntfs_log_perror("Failed to cleanly unmount volume %s",
opts.device);
}
free(ctx);
ctx = NULL;
free(opts.device);
}
static void ntfs_fuse_destroy2(void *unused __attribute__((unused)))
{
ntfs_fuse_destroy();
}
static struct fuse_operations ntfs_fuse_oper = {
.getattr = ntfs_fuse_getattr,
.readlink = ntfs_fuse_readlink,
.readdir = ntfs_fuse_readdir,
.open = ntfs_fuse_open,
.read = ntfs_fuse_read,
.write = ntfs_fuse_write,
.truncate = ntfs_fuse_truncate,
.statfs = ntfs_fuse_statfs,
.chmod = ntfs_fuse_chmod,
.chown = ntfs_fuse_chown,
.mknod = ntfs_fuse_mknod,
.symlink = ntfs_fuse_symlink,
.link = ntfs_fuse_link,
.unlink = ntfs_fuse_unlink,
.rename = ntfs_fuse_rename,
.mkdir = ntfs_fuse_mkdir,
.rmdir = ntfs_fuse_rmdir,
.utime = ntfs_fuse_utime,
.bmap = ntfs_fuse_bmap,
.destroy = ntfs_fuse_destroy2,
#ifdef HAVE_SETXATTR
.getxattr = ntfs_fuse_getxattr,
.setxattr = ntfs_fuse_setxattr,
.removexattr = ntfs_fuse_removexattr,
.listxattr = ntfs_fuse_listxattr,
#endif /* HAVE_SETXATTR */
};
static int ntfs_fuse_init(void)
{
ctx = ntfs_malloc(sizeof(ntfs_fuse_context_t));
if (!ctx)
return -1;
*ctx = (ntfs_fuse_context_t) {
.state = NF_FreeClustersOutdate | NF_FreeMFTOutdate,
.uid = getuid(),
.gid = getgid(),
.fmask = 0,
.dmask = 0,
.streams = NF_STREAMS_INTERFACE_NONE,
};
return 0;
}
static ntfs_volume *ntfs_open(const char *device, char *mntpoint, int blkdev)
{
unsigned long flags = 0;
if (!blkdev)
flags |= MS_EXCLUSIVE;
if (ctx->ro)
flags |= MS_RDONLY;
if (ctx->noatime)
flags |= MS_NOATIME;
if (ctx->force)
flags |= MS_FORCE;
ctx->vol = utils_mount_volume(device, mntpoint, flags, ctx->force);
return ctx->vol;
}
static void signal_handler(int arg __attribute__((unused)))
{
fuse_exit((fuse_get_context())->fuse);
}
static char *parse_mount_options(const char *orig_opts)
{
char *options, *s, *opt, *val, *ret;
BOOL no_def_opts = FALSE;
int default_permissions = 0;
/*
* +7 fsname=
* +1 comma
* +1 null-terminator
* +21 ,blkdev,blksize=65536
* +20 ,default_permissions
* +PATH_MAX resolved realpath() device name
*/
ret = ntfs_malloc(strlen(def_opts) + strlen(orig_opts) + 64 + PATH_MAX);
if (!ret)
return NULL;
*ret = 0;
options = strdup(orig_opts);
if (!options) {
ntfs_log_perror("strdup failed");
return NULL;
}
/*
* FIXME: Due to major performance hit and interference
* issues, always use the 'noatime' options for now.
*/
ctx->noatime = TRUE;
strcat(ret, "noatime,");
ctx->silent = TRUE;
s = options;
while (s && *s && (val = strsep(&s, ","))) {
opt = strsep(&val, "=");
if (!strcmp(opt, "ro")) { /* Read-only mount. */
if (val) {
ntfs_log_error("'ro' option should not have "
"value.\n");
goto err_exit;
}
ctx->ro = TRUE;
strcat(ret, "ro,");
} else if (!strcmp(opt, "noatime")) {
if (val) {
ntfs_log_error("'noatime' option should not "
"have value.\n");
goto err_exit;
}
} else if (!strcmp(opt, "fake_rw")) {
if (val) {
ntfs_log_error("'fake_rw' option should not "
"have value.\n");
goto err_exit;
}
ctx->ro = TRUE;
} else if (!strcmp(opt, "fsname")) { /* Filesystem name. */
/*
* We need this to be able to check whether filesystem
* mounted or not.
*/
ntfs_log_error("'fsname' is unsupported option.\n");
goto err_exit;
} else if (!strcmp(opt, "no_def_opts")) {
if (val) {
ntfs_log_error("'no_def_opts' option should "
"not have value.\n");
goto err_exit;
}
no_def_opts = TRUE; /* Don't add default options. */
} else if (!strcmp(opt, "default_permissions")) {
default_permissions = 1;
} else if (!strcmp(opt, "umask")) {
if (!val) {
ntfs_log_error("'umask' option should have "
"value.\n");
goto err_exit;
}
sscanf(val, "%o", &ctx->fmask);
ctx->dmask = ctx->fmask;
default_permissions = 1;
} else if (!strcmp(opt, "fmask")) {
if (!val) {
ntfs_log_error("'fmask' option should have "
"value.\n");
goto err_exit;
}
sscanf(val, "%o", &ctx->fmask);
default_permissions = 1;
} else if (!strcmp(opt, "dmask")) {
if (!val) {
ntfs_log_error("'dmask' option should have "
"value.\n");
goto err_exit;
}
sscanf(val, "%o", &ctx->dmask);
default_permissions = 1;
} else if (!strcmp(opt, "uid")) {
if (!val) {
ntfs_log_error("'uid' option should have "
"value.\n");
goto err_exit;
}
sscanf(val, "%i", &ctx->uid);
default_permissions = 1;
} else if (!strcmp(opt, "gid")) {
if (!val) {
ntfs_log_error("'gid' option should have "
"value.\n");
goto err_exit;
}
sscanf(val, "%i", &ctx->gid);
default_permissions = 1;
} else if (!strcmp(opt, "show_sys_files")) {
if (val) {
ntfs_log_error("'show_sys_files' option should "
"not have value.\n");
goto err_exit;
}
ctx->show_sys_files = TRUE;
} else if (!strcmp(opt, "silent")) {
if (val) {
ntfs_log_error("'silent' option should "
"not have value.\n");
goto err_exit;
}
ctx->silent = TRUE;
} else if (!strcmp(opt, "force")) {
if (val) {
ntfs_log_error("'force' option should not "
"have value.\n");
goto err_exit;
}
ctx->force = TRUE;
} else if (!strcmp(opt, "locale")) {
if (!val) {
ntfs_log_error("'locale' option should have "
"value.\n");
goto err_exit;
}
if (!setlocale(LC_ALL, val))
ntfs_log_error(locale_msg, val);
} else if (!strcmp(opt, "streams_interface")) {
if (!val) {
ntfs_log_error("'streams_interface' option "
"should have value.\n");
goto err_exit;
}
if (!strcmp(val, "none"))
ctx->streams = NF_STREAMS_INTERFACE_NONE;
else if (!strcmp(val, "xattr"))
ctx->streams = NF_STREAMS_INTERFACE_XATTR;
else if (!strcmp(val, "windows"))
ctx->streams = NF_STREAMS_INTERFACE_WINDOWS;
else {
ntfs_log_error("Invalid named data streams "
"access interface.\n");
goto err_exit;
}
} else if (!strcmp(opt, "noauto")) {
/* Don't pass noauto option to fuse. */
} else if (!strcmp(opt, "debug")) {
if (val) {
ntfs_log_error("'debug' option should not have "
"value.\n");
goto err_exit;
}
ctx->debug = TRUE;
ntfs_log_set_levels(NTFS_LOG_LEVEL_DEBUG);
ntfs_log_set_levels(NTFS_LOG_LEVEL_TRACE);
} else if (!strcmp(opt, "no_detach")) {
if (val) {
ntfs_log_error("'no_detach' option should not "
"have value.\n");
goto err_exit;
}
ctx->no_detach = TRUE;
} else if (!strcmp(opt, "remount")) {
ntfs_log_error("Remounting is not supported at present."
" You have to umount volume and then "
"mount it once again.\n");
goto err_exit;
} else if (!strcmp(opt, "blksize")) {
ntfs_log_info("WARNING: blksize option is ignored "
"because ntfs-3g must calculate it.\n");
} else { /* Probably FUSE option. */
strcat(ret, opt);
if (val) {
strcat(ret, "=");
strcat(ret, val);
}
strcat(ret, ",");
}
}
if (!no_def_opts)
strcat(ret, def_opts);
if (default_permissions)
strcat(ret, "default_permissions,");
strcat(ret, "fsname=");
strcat(ret, opts.device);
exit:
free(options);
return ret;
err_exit:
free(ret);
ret = NULL;
goto exit;
}
static void usage(void)
{
ntfs_log_info(usage_msg, EXEC_NAME, VERSION, EXEC_NAME, ntfs_home);
}
#ifndef HAVE_REALPATH
/* If there is no realpath() on the system, provide a dummy one. */
static char *realpath(const char *path, char *resolved_path)
{
strncpy(resolved_path, path, PATH_MAX);
resolved_path[PATH_MAX] = '\0';
return resolved_path;
}
#endif
static int strappend(char **dest, const char *append)
{
char *p;
size_t size;
if (!dest)
return -1;
if (!append)
return 0;
size = strlen(append) + 1;
if (*dest)
size += strlen(*dest);
p = realloc(*dest, size);
if (!p) {
ntfs_log_perror("Memory realloction failed");
return -1;
}
if (*dest)
strcat(p, append);
else
strcpy(p, append);
*dest = p;
return 0;
}
/**
* parse_options - Read and validate the programs command line
* Read the command line, verify the syntax and parse the options.
*
* Return: 0 success, -1 error.
*/
static int parse_options(int argc, char *argv[])
{
int c;
static const char *sopt = "-o:hv";
static const struct option lopt[] = {
{ "options", required_argument, NULL, 'o' },
{ "help", no_argument, NULL, 'h' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
opterr = 0; /* We'll handle the errors, thank you. */
while ((c = getopt_long(argc, argv, sopt, lopt, NULL)) != -1) {
switch (c) {
case 1: /* A non-option argument */
if (!opts.device) {
opts.device = ntfs_malloc(PATH_MAX + 1);
if (!opts.device)
return -1;
/* We don't want relative path in /etc/mtab. */
if (optarg[0] != '/') {
if (!realpath(optarg, opts.device)) {
ntfs_log_perror("%s: "
"Cannot mount '%s'",
EXEC_NAME, optarg);
free(opts.device);
opts.device = NULL;
return -1;
}
} else
strcpy(opts.device, optarg);
} else if (!opts.mnt_point) {
opts.mnt_point = optarg;
} else {
ntfs_log_error("%s: You must specify exactly one "
"device and exactly one mount "
"point.\n", EXEC_NAME);
return -1;
}
break;
case 'o':
if (opts.options)
if (strappend(&opts.options, ","))
return -1;
if (strappend(&opts.options, optarg))
return -1;
break;
case 'h':
usage();
exit(9);
case 'v':
/*
* We must handle the 'verbose' option even if
* we don't use it because mount(8) passes it.
*/
break;
default:
ntfs_log_error("%s: Unknown option '%s'.\n", EXEC_NAME,
argv[optind - 1]);
return -1;
}
}
if (!opts.device) {
ntfs_log_error("%s: No device is specified.\n", EXEC_NAME);
return -1;
}
if (!opts.mnt_point) {
ntfs_log_error("%s: No mountpoint is specified.\n", EXEC_NAME);
return -1;
}
return 0;
}
#ifdef linux
static const char *fuse26_kmod_msg =
"WARNING: Deficient Linux kernel detected. Some driver features are\n"
" not available (swap file on NTFS, boot from NTFS by LILO), and\n"
" unmount is not safe unless it's made sure the ntfs-3g process\n"
" naturally terminates after calling 'umount'. If you wish this\n"
" message to disappear then you should upgrade to at least kernel\n"
" version 2.6.20, or request help from your distribution to fix\n"
" the kernel problem. The below web page has more information:\n"
" http://ntfs-3g.org/support.html#fuse26\n"
"\n";
static void create_dev_fuse(void)
{
struct stat st;
if (stat("/dev/fuse", &st) && (errno == ENOENT)) {
if (mknod("/dev/fuse", S_IFCHR | 0666, makedev(10, 229))) {
ntfs_log_perror("Failed to create /dev/fuse");
if (errno == EPERM)
ntfs_log_error(dev_fuse_msg);
}
}
}
static fuse_fstype get_fuse_fstype(void)
{
char buf[256];
fuse_fstype fstype = FSTYPE_NONE;
FILE *f = fopen("/proc/filesystems", "r");
if (!f) {
ntfs_log_perror("Failed to open /proc/filesystems");
return FSTYPE_UNKNOWN;
}
while (fgets(buf, sizeof(buf), f)) {
if (strstr(buf, "fuseblk\n")) {
fstype = FSTYPE_FUSEBLK;
break;
}
if (strstr(buf, "fuse\n"))
fstype = FSTYPE_FUSE;
}
fclose(f);
return fstype;
}
static fuse_fstype load_fuse_module(void)
{
int i;
struct stat st;
pid_t pid;
const char *cmd = "/sbin/modprobe";
struct timespec req = { 0, 100000000 }; /* 100 msec */
fuse_fstype fstype;
if (!stat(cmd, &st) && !getuid()) {
pid = fork();
if (!pid) {
execl(cmd, cmd, "fuse", NULL);
_exit(1);
} else if (pid != -1)
waitpid(pid, NULL, 0);
}
for (i = 0; i < 10; i++) {
/*
* We sleep first because despite the detection of the loaded
* FUSE kernel module, fuse_mount() can still fail if it's not
* fully functional/initialized. Note, of course this is still
* unreliable but usually helps.
*/
nanosleep(&req, NULL);
fstype = get_fuse_fstype();
if (fstype != FSTYPE_NONE)
break;
}
return fstype;
}
#endif
static struct fuse_chan *try_fuse_mount(char *parsed_options)
{
struct fuse_chan *fc = NULL;
struct fuse_args margs = FUSE_ARGS_INIT(0, NULL);
/* The fuse_mount() options get modified, so we always rebuild it */
if ((fuse_opt_add_arg(&margs, EXEC_NAME) == -1 ||
fuse_opt_add_arg(&margs, "-o") == -1 ||
fuse_opt_add_arg(&margs, parsed_options) == -1)) {
ntfs_log_error("Failed to set FUSE options.\n");
goto free_args;
}
fc = fuse_mount(opts.mnt_point, &margs);
if (!fc)
ntfs_log_error("FUSE mount point creation failed\n");
free_args:
fuse_opt_free_args(&margs);
return fc;
}
static void set_fuseblk_options(char *parsed_options)
{
char options[64];
long pagesize;
u32 blksize = ctx->vol->cluster_size;
pagesize = sysconf(_SC_PAGESIZE);
if (pagesize < 1)
pagesize = 4096;
if (blksize > (u32)pagesize)
blksize = pagesize;
/* parsed_options already allocated enough space. */
snprintf(options, sizeof(options), ",blkdev,blksize=%u", blksize);
strcat(parsed_options, options);
}
int main(int argc, char *argv[])
{
char *parsed_options = NULL;
struct fuse_args margs = FUSE_ARGS_INIT(0, NULL);
struct fuse *fh;
struct fuse_chan *fc;
fuse_fstype fstype = FSTYPE_UNKNOWN;
struct stat sbuf;
int use_blkdev = 0;
uid_t uid, euid;
int err = 10;
utils_set_locale();
ntfs_log_set_handler(ntfs_log_handler_stderr);
signal(SIGINT, signal_handler);
signal(SIGTERM, signal_handler);
if (parse_options(argc, argv)) {
usage();
return 1;
}
if (ntfs_fuse_init())
return 2;
parsed_options = parse_mount_options(opts.options ? opts.options : "");
if (!parsed_options)
goto err_out;
uid = getuid();
euid = geteuid();
if (setuid(euid)) {
ntfs_log_perror("Failed to set user ID to %d", euid);
goto err_out;
}
#ifdef linux
fstype = get_fuse_fstype();
if (fstype == FSTYPE_NONE || fstype == FSTYPE_UNKNOWN)
fstype = load_fuse_module();
create_dev_fuse();
#endif
if (stat(opts.device, &sbuf)) {
ntfs_log_perror("Failed to access '%s'", opts.device);
goto err_out;
}
/* Always use fuseblk for block devices unless it's surely missing. */
if (S_ISBLK(sbuf.st_mode) && (fstype != FSTYPE_FUSE))
use_blkdev = 1;
if (!ntfs_open(opts.device, opts.mnt_point, use_blkdev))
goto err_out;
if (use_blkdev)
set_fuseblk_options(parsed_options);
/* Libfuse can't always find fusermount, so let's help it. */
if (setenv("PATH", ":/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin", 0))
ntfs_log_perror("WARNING: Failed to set $PATH\n");
fc = try_fuse_mount(parsed_options);
if (!fc)
goto err_out;
fh = (struct fuse *)1; /* Cast anything except NULL to handle errors. */
if (fuse_opt_add_arg(&margs, "") == -1 ||
fuse_opt_add_arg(&margs, "-o") == -1)
fh = NULL;
if (!ctx->debug && !ctx->no_detach) {
if (fuse_opt_add_arg(&margs, "use_ino,kernel_cache") == -1)
fh = NULL;
} else {
if (fuse_opt_add_arg(&margs, "use_ino,kernel_cache,debug") == -1)
fh = NULL;
}
if (fh)
fh = fuse_new(fc, &margs , &ntfs_fuse_oper,
sizeof(ntfs_fuse_oper), NULL);
fuse_opt_free_args(&margs);
if (!fh) {
ntfs_log_error("fuse_new failed.\n");
fuse_unmount(opts.mnt_point, fc);
goto err_out;
}
if (setuid(uid)) {
ntfs_log_perror("Failed to set user ID to %d", uid);
fuse_unmount(opts.mnt_point, fc);
goto err_out;
}
#ifdef linux
if (S_ISBLK(sbuf.st_mode) && (fstype == FSTYPE_FUSE))
ntfs_log_info(fuse26_kmod_msg);
#endif
if (!ctx->no_detach) {
if (daemon(0, ctx->debug))
ntfs_log_error("Failed to daemonize.\n");
else if (!ctx->debug) {
#ifndef DEBUG
ntfs_log_set_handler(ntfs_log_handler_syslog);
/* Override default libntfs identify. */
openlog(EXEC_NAME, LOG_PID, LOG_DAEMON);
#endif
}
}
ntfs_log_info("Version %s\n", VERSION);
ntfs_log_info("Mounted %s (%s, label \"%s\", NTFS %d.%d)\n",
opts.device, (ctx->ro) ? "Read-Only" : "Read-Write",
ctx->vol->vol_name, ctx->vol->major_ver,
ctx->vol->minor_ver);
ntfs_log_info("Cmdline options: %s\n", opts.options);
ntfs_log_info("Mount options: %s\n", parsed_options);
fuse_loop(fh);
fuse_unmount(opts.mnt_point, fc);
fuse_destroy(fh);
err = 0;
err_out:
free(opts.options);
free(parsed_options);
ntfs_fuse_destroy();
return err;
}
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