/*
- * main.c
- * FUSE-based exFAT implementation. Requires FUSE 2.6 or later.
- *
- * Created by Andrew Nayenko on 01.09.09.
- * This software is distributed under the GNU General Public License
- * version 3 or any later.
- */
+ main.c (01.09.09)
+ FUSE-based exFAT implementation. Requires FUSE 2.6 or later.
+
+ Copyright (C) 2009, 2010 Andrew Nayenko
+
+ 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 3 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. If not, see <http://www.gnu.org/licenses/>.
+*/
#include <fuse.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <exfat.h>
+#include <inttypes.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <pwd.h>
+#include <unistd.h>
#define exfat_debug(format, ...)
#error FUSE 2.6 or later is required
#endif
+const char* default_options = "allow_other,blkdev";
+
struct exfat ef;
-static struct exfat_node* get_node(const struct fuse_file_info *fi)
+static struct exfat_node* get_node(const struct fuse_file_info* fi)
{
return (struct exfat_node*) (size_t) fi->fh;
}
-static void set_node(struct fuse_file_info *fi, struct exfat_node* node)
+static void set_node(struct fuse_file_info* fi, struct exfat_node* node)
{
fi->fh = (uint64_t) (size_t) node;
}
-static int fuse_exfat_getattr(const char *path, struct stat *stbuf)
+static int fuse_exfat_getattr(const char* path, struct stat* stbuf)
{
struct exfat_node* node;
int rc;
if (rc != 0)
return rc;
- exfat_stat(node, stbuf);
+ exfat_stat(&ef, node, stbuf);
exfat_put_node(&ef, node);
return 0;
}
-static int fuse_exfat_truncate(const char *path, off_t size)
+static int fuse_exfat_truncate(const char* path, off_t size)
{
struct exfat_node* node;
int rc;
- exfat_debug("[fuse_exfat_truncate] %s, %llu", path, size);
+ exfat_debug("[fuse_exfat_truncate] %s, %"PRIu64, path, (uint64_t) size);
rc = exfat_lookup(&ef, &node, path);
if (rc != 0)
return rc;
- exfat_truncate(&ef, node, size);
+ rc = exfat_truncate(&ef, node, size);
exfat_put_node(&ef, node);
- return 0;
+ return rc;
}
-static int fuse_exfat_readdir(const char *path, void *buffer,
- fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi)
+static int fuse_exfat_readdir(const char* path, void* buffer,
+ fuse_fill_dir_t filler, off_t offset, struct fuse_file_info* fi)
{
struct exfat_node* parent;
struct exfat_node* node;
while ((node = exfat_readdir(&ef, &it)))
{
exfat_get_name(node, name, EXFAT_NAME_MAX);
- exfat_debug("[fuse_exfat_readdir] %s: %s, %llu bytes, cluster %u",
+ exfat_debug("[fuse_exfat_readdir] %s: %s, %"PRIu64" bytes, cluster %u",
name, IS_CONTIGUOUS(*node) ? "contiguous" : "fragmented",
- node->size, node->start_cluster);
+ (uint64_t) node->size, node->start_cluster);
filler(buffer, name, NULL, 0);
exfat_put_node(&ef, node);
}
return 0;
}
-static int fuse_exfat_open(const char *path, struct fuse_file_info *fi)
+static int fuse_exfat_open(const char* path, struct fuse_file_info* fi)
{
struct exfat_node* node;
int rc;
return 0;
}
-static int fuse_exfat_release(const char *path, struct fuse_file_info *fi)
+static int fuse_exfat_release(const char* path, struct fuse_file_info* fi)
{
exfat_put_node(&ef, get_node(fi));
return 0;
}
-static int fuse_exfat_read(const char *path, char *buffer, size_t size,
- off_t offset, struct fuse_file_info *fi)
+static int fuse_exfat_read(const char* path, char* buffer, size_t size,
+ off_t offset, struct fuse_file_info* fi)
{
exfat_debug("[fuse_exfat_read] %s (%zu bytes)", path, size);
return exfat_read(&ef, get_node(fi), buffer, size, offset);
}
-static int fuse_exfat_write(const char *path, const char *buffer, size_t size,
- off_t offset, struct fuse_file_info *fi)
+static int fuse_exfat_write(const char* path, const char* buffer, size_t size,
+ off_t offset, struct fuse_file_info* fi)
{
exfat_debug("[fuse_exfat_write] %s (%zu bytes)", path, size);
return exfat_write(&ef, get_node(fi), buffer, size, offset);
}
-int fuse_exfat_unlink(const char *path)
+static int fuse_exfat_unlink(const char* path)
{
struct exfat_node* node;
int rc;
return rc;
}
-int fuse_exfat_rmdir(const char *path)
+static int fuse_exfat_rmdir(const char* path)
{
struct exfat_node* node;
int rc;
return exfat_mkdir(&ef, path);
}
-static int fuse_exfat_statfs(const char *path, struct statvfs *sfs)
+static int fuse_exfat_rename(const char* old_path, const char* new_path)
{
- const uint64_t block_count = le64_to_cpu(ef.sb->block_count);
+ exfat_debug("[fuse_exfat_rename] %s => %s", old_path, new_path);
+ return exfat_rename(&ef, old_path, new_path);
+}
+
+static int fuse_exfat_utimens(const char* path, const struct timespec tv[2])
+{
+ struct exfat_node* node;
+ int rc;
+
+ exfat_debug("[fuse_exfat_utimens] %s", path);
+
+ rc = exfat_lookup(&ef, &node, path);
+ if (rc != 0)
+ return rc;
+
+ exfat_utimes(node, tv);
+ exfat_put_node(&ef, node);
+ return 0;
+}
- sfs->f_bsize = BLOCK_SIZE(*ef.sb);
+static int fuse_exfat_statfs(const char* path, struct statvfs* sfs)
+{
+ sfs->f_bsize = CLUSTER_SIZE(*ef.sb);
sfs->f_frsize = CLUSTER_SIZE(*ef.sb);
- sfs->f_blocks = block_count;
- sfs->f_bavail = block_count - ef.sb->allocated_percent * block_count / 100;
+ sfs->f_blocks = le64_to_cpu(ef.sb->block_count) >> ef.sb->bpc_bits;
+ sfs->f_bavail = exfat_count_free_clusters(&ef);
sfs->f_bfree = sfs->f_bavail;
sfs->f_namemax = EXFAT_NAME_MAX;
return 0;
}
-void fuse_exfat_destroy(void* unused)
+static void fuse_exfat_destroy(void* unused)
{
exfat_unmount(&ef);
}
static void usage(const char* prog)
{
- fprintf(stderr, "Usage: %s <spec> <mountpoint> [-o options]\n", prog);
+ fprintf(stderr, "Usage: %s [-d] [-o options] <device> <dir>\n", prog);
exit(1);
}
.rmdir = fuse_exfat_rmdir,
.mknod = fuse_exfat_mknod,
.mkdir = fuse_exfat_mkdir,
+ .rename = fuse_exfat_rename,
+ .utimens = fuse_exfat_utimens,
.statfs = fuse_exfat_statfs,
.destroy = fuse_exfat_destroy,
};
+static char* add_option(char* options, const char* name, const char* value)
+{
+ size_t size;
+
+ if (value)
+ size = strlen(options) + strlen(name) + strlen(value) + 3;
+ else
+ size = strlen(options) + strlen(name) + 2;
+
+ options = realloc(options, size);
+ if (options == NULL)
+ {
+ exfat_error("failed to reallocate options string");
+ return NULL;
+ }
+ strcat(options, ",");
+ strcat(options, name);
+ if (value)
+ {
+ strcat(options, "=");
+ strcat(options, value);
+ }
+ return options;
+}
+
+static char* add_fsname_option(char* options, const char* spec)
+{
+ char spec_abs[PATH_MAX];
+
+ if (realpath(spec, spec_abs) == NULL)
+ {
+ free(options);
+ exfat_error("failed to get absolute path for `%s'", spec);
+ return NULL;
+ }
+ return add_option(options, "fsname", spec_abs);
+}
+
+static char* add_user_option(char* options)
+{
+ struct passwd* pw;
+
+ if (getuid() == 0)
+ return options;
+
+ pw = getpwuid(getuid());
+ if (pw == NULL || pw->pw_name == NULL)
+ {
+ free(options);
+ exfat_error("failed to determine username");
+ return NULL;
+ }
+ return add_option(options, "user", pw->pw_name);
+}
+
+static char* add_blksize_option(char* options, long cluster_size)
+{
+ long page_size = sysconf(_SC_PAGESIZE);
+ char blksize[20];
+
+ if (page_size < 1)
+ page_size = 0x1000;
+
+ snprintf(blksize, sizeof(blksize), "%ld", MIN(page_size, cluster_size));
+ return add_option(options, "blksize", blksize);
+}
+
int main(int argc, char* argv[])
{
struct fuse_args mount_args = FUSE_ARGS_INIT(0, NULL);
struct fuse_args newfs_args = FUSE_ARGS_INIT(0, NULL);
const char* spec = NULL;
const char* mount_point = NULL;
- const char* mount_options = "";
+ char* mount_options;
int debug = 0;
struct fuse_chan* fc = NULL;
struct fuse* fh = NULL;
char** pp;
- printf("FUSE exfat %u.%u\n", EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR);
+ printf("FUSE exfat %u.%u.%u\n",
+ EXFAT_VERSION_MAJOR, EXFAT_VERSION_MINOR, EXFAT_VERSION_PATCH);
+
+ mount_options = strdup(default_options);
+ if (mount_options == NULL)
+ {
+ exfat_error("failed to allocate options string");
+ return 1;
+ }
for (pp = argv + 1; *pp; pp++)
{
pp++;
if (*pp == NULL)
usage(argv[0]);
- mount_options = *pp;
+ mount_options = add_option(mount_options, *pp, NULL);
+ if (mount_options == NULL)
+ return 1;
}
else if (strcmp(*pp, "-d") == 0)
debug = 1;
else if (mount_point == NULL)
mount_point = *pp;
else
+ {
+ free(mount_options);
usage(argv[0]);
+ }
}
if (spec == NULL || mount_point == NULL)
+ {
+ free(mount_options);
usage(argv[0]);
+ }
+
+ if (exfat_mount(&ef, spec, mount_options) != 0)
+ {
+ free(mount_options);
+ return 1;
+ }
+
+ mount_options = add_fsname_option(mount_options, spec);
+ if (mount_options == NULL)
+ {
+ exfat_unmount(&ef);
+ return 1;
+ }
+ mount_options = add_user_option(mount_options);
+ if (mount_options == NULL)
+ {
+ exfat_unmount(&ef);
+ return 1;
+ }
+ mount_options = add_blksize_option(mount_options, CLUSTER_SIZE(*ef.sb));
+ if (mount_options == NULL)
+ {
+ exfat_unmount(&ef);
+ return 1;
+ }
/* create arguments for fuse_mount() */
if (fuse_opt_add_arg(&mount_args, "exfat") != 0 ||
fuse_opt_add_arg(&mount_args, "-o") != 0 ||
fuse_opt_add_arg(&mount_args, mount_options) != 0)
+ {
+ exfat_unmount(&ef);
+ free(mount_options);
return 1;
+ }
+
+ free(mount_options);
/* create FUSE mount point */
fc = fuse_mount(mount_point, &mount_args);
fuse_opt_free_args(&mount_args);
if (fc == NULL)
+ {
+ exfat_unmount(&ef);
return 1;
+ }
/* create arguments for fuse_new() */
if (fuse_opt_add_arg(&newfs_args, "") != 0 ||
(debug && fuse_opt_add_arg(&newfs_args, "-d") != 0))
{
fuse_unmount(mount_point, fc);
+ exfat_unmount(&ef);
return 1;
}
if (fh == NULL)
{
fuse_unmount(mount_point, fc);
+ exfat_unmount(&ef);
return 1;
}
{
fuse_unmount(mount_point, fc);
fuse_destroy(fh);
- return 1;
- }
-
- if (exfat_mount(&ef, spec) != 0)
- {
- fuse_unmount(mount_point, fc);
- fuse_destroy(fh);
+ exfat_unmount(&ef);
return 1;
}
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