Released 2.4

otherwise, other local users could change the mapping, and gain access
to things they shouldn't

.cvsignore

@@ -1,17 +0,0 @@
-.deps
-COPYING
-INSTALL
-FAQ.txt
-Makefile
-Makefile.in
-aclocal.m4
-*.cache
-config.*
-configure
-compile
-depcomp
-install-sh
-missing
-sshfs
-stamp*
-.deps

.gitignore

@@ -0,0 +1,36 @@
+#
+# NOTE! Don't add files that are generated in specific
+# subdirectories here. Add them in the ".gitignore" file
+# in that subdirectory instead.
+#
+# NOTE! Please use 'git ls-files -i --exclude-standard'
+# command after changing this file, to see if there are
+# any tracked files which get ignored after the change.
+.*
+!.gitignore
+*.o
+*.lo
+*.la
+*.gz
+\#*#
+*.orig
+*~
+Makefile.in
+Makefile
+*.m4
+stamp-h*
+config.*
+/sshfs
+/ltmain.sh
+/configure
+/install-sh
+/mkinstalldirs
+/missing
+/*.cache
+/depcomp
+/compile
+/libtool
+/INSTALL
+/.pc
+/patches
+/m4

COPYING

@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+
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+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
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+
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

ChangeLog

@@ -1,3 +1,202 @@
+2012-03-08  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Released 2.4
+
+2012-03-08  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Make sure idmap files aren't writable by others otherwise, other
+	local users could change the mapping, and gain access to things
+	they shouldn't.  Patch by Mike Kelly
+
+2012-02-08  Chris Wolfe <cwolfe@chromium.org>
+
+	* Add -o slave. This option routes the sftp communication over stdin
+	and stdout, bypassing SSH and network.
+
+2011-12-16  Mike Kelly <mike@pair.com>
+
+	* Add -o idmap=file, -o uidmap=FILE, -o gidmap=FILE. These options
+	allow you to create a pair of local files, similar to /etc/passwd or
+	/etc/group files from the remote server, and use those to remap all
+	the given UIDs/GIDs.
+
+2011-11-25  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Make chown respect the UID mapping policy.  Reported and tested
+	by Vivenzio Pagliari
+
+2011-11-16  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Submit max 32k reads and writes to the sftp server.  Also don't
+	limit the kernel to 64k reads and writes, rather split into 32k
+	sized chunks and send them to the server all at once.  This is
+	more efficient and less demanding from the server.  Reported by
+	Ludovic Courtès.  Fix suggested by Niels Möller
+
+2011-11-14  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix double free if reconnection races with request sending.
+	Patch by E. Kuemmerle
+
+	* Add locking around modifver and connver
+
+2011-10-21  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Remove "-oPreferredAuthentications" from ssh options if the
+	"password_stdin" option is used.  Reported by E. Kuemmerle
+
+2011-08-24  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add "-oworkaround=fstat" for SFTP servers which don't support
+	the FSTAT message.  Patch by: Percy Jahn
+
+2011-07-01  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Released 2.3
+
+2011-07-01  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add hard link operation.  Works if the server supports the
+	"hardlink@openssh.com" protocol extension.
+
+2011-03-25  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix possible deadlock on reconnection.  Reported by Florian
+	Zumbiehl
+
+2011-01-25  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix cleanup when ssh connection is terminated.  This prevents
+	sshfs hanging when the server is rebooted, for example.
+
+2010-03-16  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Set FD_CLOEXEC on fuse device.  This prevents deadlocks that
+	happen in some circumstances (bugzilla.kernel.org #12864).
+	Reported by Tim Connors
+
+2009-07-15  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Check mountpoint and fuse options before starting an ssh
+	session (debian bug #535333).  This is only supported if compiled
+	against libfuse-2.6 or later. Reported by Greg Kochanski
+
+	* Check that the remote path specified refers to the same type of
+	file as the mountpoint, i.e. both are directories or both are
+	non-directories (debian bug #535343).  Reported by Greg Kochanski
+
+	* Allow mounting a single non-directory from the server
+
+2009-07-15  Sebastian Dransfeld <sebastid@tango.flipp.net>
+
+	* Add option 'delay_connect': This will always create the sshfs mount,
+	even if the connection to the server can't be established.
+
+2009-01-27  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Print usage information and version to stdout, not stderr.
+	Libfuse also needs to be fixed up.  Reported by Kārlis Repsons
+
+2008-10-20  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Released 2.2
+
+2008-10-20  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Escape commas in fsname option if libfuse supports it
+
+2008-10-08  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Handle numerical IPv6 addresses enclosed in square brackets.
+	Reported by Andre-John Mas
+
+	* Fix error if username contains a comma character.  Reported by
+	Yang Zhang
+
+	* Fix harmless glib assertations with "cache=no"
+
+2008-07-11  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Released 2.1
+
+2008-07-11  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix statvfs extension to match the current protocol in
+	opensshfs
+
+	* Check version numbers of extensions, so such changes wouldn't
+	cause stupid behavior
+
+2008-06-24  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add '-F' option to specify the ssh config file.  Patch by Pat
+	Pascal.
+
+2008-05-06  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix bug in caching which could cause file corruption for append
+	mode writes.  Reported by Jose Alonso
+
+2008-05-05  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix compile on OS X.  Original patch from Michael G Schwern
+
+	* Fix compile on Solaris.  Reported by Jean-Jacques Sarton
+
+2008-04-23  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Released 2.0
+
+2008-04-23  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add manual page.  Written by Bartosz Fenski
+
+2008-04-22  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add missing ssh options: ControlMaster, ControlPath,
+	KbdInteractiveAuthentication, KbdInteractiveDevices, LocalCommand,
+	RekeyLimit (Debian bug #430225).
+
+	* Allow the '-ossh_command=CMD' command to contain parameters.
+	Escape charater is backslash.
+
+	* Limit write requests to 64kB.
+
+	* Support "statvfs@openssh.com" extension, which will be available
+	in OpenSSH 5.1.
+
+2008-04-21  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix incorrect disk usage reported by 'du' for files of size 4GB
+	or above.  Reported by Christian Boltz.
+
+2008-04-16  Miklos Szeredi <miklos@szeredi.hu>
+
+	* If debugging is enabled, print some statistics at exit about the
+	number of bytes transferred, etc..
+
+2008-03-31  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Support "posix-rename@openssh.com" extension available in
+	OpenSSH 4.9.  This allows rename to be atomic even when target
+	file or directory exists.  If available, the extension will be
+	used instead of the rename operation in the original protocol and
+	the "-oworkaround=rename" option will be ignored.
+
+2008-03-28  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Add support for password authentication with pam_mount.
+	Original patch and help with testing: John S. Skogtvedt
+
+2008-03-03  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix ssh debug only appearing if "-d" is used.  Reported by
+	Michael Gorbach
+
+2008-01-03  Miklos Szeredi <miklos@szeredi.hu>
+
+	* Fix condition for building of sshnodelay.so
+
 2007-12-17  Miklos Szeredi <miklos@szeredi.hu>
 
 	* Released 1.9

Makefile.am

@@ -14,6 +14,8 @@ sshfs_CPPFLAGS = -D_REENTRANT -DFUSE_USE_VERSION=26 -DLIBDIR=\"$(libdir)\"
 EXTRA_DIST = sshnodelay.c FAQ.txt
 CLEANFILES = sshnodelay.so
 
+dist_man_MANS = sshfs.1
+
 if SSH_NODELAY_SO
 all-local: sshnodelay.so
 

NEWS

@@ -1,3 +1,26 @@
+What is new in 2.1, 2.2 and 2.3
+-------------------------------
+
+* Support hard link creation if server is OpenSSH 5.7 or later
+
+* Check mount point and options before connecting to ssh server
+
+* Handle commas in usernames
+
+* Small improvements and bug fixes
+
+
+What is new in 2.0
+------------------
+
+* Support password authentication with pam_mount
+
+* Support atomic renames if server is OpenSSH 4.9 or later
+
+* Support getting disk usage if server is OpenSSH 5.1 or later
+
+* Small enhancements and bug fixes
+
 What is new in 1.9
 ------------------
 

cache.c

@@ -28,6 +28,7 @@ struct cache {
 	GHashTable *table;
 	pthread_mutex_t lock;
 	time_t last_cleaned;
+	uint64_t write_ctr;
 };
 
 static struct cache cache;
@@ -47,6 +48,7 @@ struct fuse_cache_dirhandle {
 	fuse_dirh_t h;
 	fuse_dirfil_t filler;
 	GPtrArray *dir;
+	uint64_t wrctr;
 };
 
 static void free_node(gpointer node_)
@@ -103,11 +105,22 @@ static void cache_purge_parent(const char *path)
 
 void cache_invalidate(const char *path)
 {
+	if (!cache.on)
+		return;
+
 	pthread_mutex_lock(&cache.lock);
 	cache_purge(path);
 	pthread_mutex_unlock(&cache.lock);
 }
 
+void cache_invalidate_write(const char *path)
+{
+	pthread_mutex_lock(&cache.lock);
+	cache_purge(path);
+	cache.write_ctr++;
+	pthread_mutex_unlock(&cache.lock);
+}
+
 static void cache_invalidate_dir(const char *path)
 {
 	pthread_mutex_lock(&cache.lock);
@@ -148,30 +161,31 @@ static struct node *cache_get(const char *path)
 	return node;
 }
 
-void cache_add_attr(const char *path, const struct stat *stbuf)
+void cache_add_attr(const char *path, const struct stat *stbuf, uint64_t wrctr)
 {
 	struct node *node;
-	time_t now;
+
+	if (!cache.on)
+		return;
 
 	pthread_mutex_lock(&cache.lock);
-	node = cache_get(path);
-	now = time(NULL);
-	node->stat = *stbuf;
-	node->stat_valid = time(NULL) + cache.stat_timeout;
-	if (node->stat_valid > node->valid)
-		node->valid = node->stat_valid;
-	cache_clean();
+	if (wrctr == cache.write_ctr) {
+		node = cache_get(path);
+		node->stat = *stbuf;
+		node->stat_valid = time(NULL) + cache.stat_timeout;
+		if (node->stat_valid > node->valid)
+			node->valid = node->stat_valid;
+		cache_clean();
+	}
 	pthread_mutex_unlock(&cache.lock);
 }
 
 static void cache_add_dir(const char *path, char **dir)
 {
 	struct node *node;
-	time_t now;
 
 	pthread_mutex_lock(&cache.lock);
 	node = cache_get(path);
-	now = time(NULL);
 	g_strfreev(node->dir);
 	node->dir = dir;
 	node->dir_valid = time(NULL) + cache.dir_timeout;
@@ -191,11 +205,9 @@ static size_t my_strnlen(const char *s, size_t maxsize)
 static void cache_add_link(const char *path, const char *link, size_t size)
 {
 	struct node *node;
-	time_t now;
 
 	pthread_mutex_lock(&cache.lock);
 	node = cache_get(path);
-	now = time(NULL);
 	g_free(node->link);
 	node->link = g_strndup(link, my_strnlen(link, size-1));
 	node->link_valid = time(NULL) + cache.link_timeout;
@@ -222,13 +234,25 @@ static int cache_get_attr(const char *path, struct stat *stbuf)
 	return err;
 }
 
+uint64_t cache_get_write_ctr(void)
+{
+	uint64_t res;
+
+	pthread_mutex_lock(&cache.lock);
+	res = cache.write_ctr;
+	pthread_mutex_unlock(&cache.lock);
+
+	return res;
+}
+
 static int cache_getattr(const char *path, struct stat *stbuf)
 {
 	int err = cache_get_attr(path, stbuf);
 	if (err) {
+		uint64_t wrctr = cache_get_write_ctr();
 		err = cache.next_oper->oper.getattr(path, stbuf);
 		if (!err)
-			cache_add_attr(path, stbuf);
+			cache_add_attr(path, stbuf, wrctr);
 	}
 	return err;
 }
@@ -268,7 +292,7 @@ static int cache_dirfill(fuse_cache_dirh_t ch, const char *name,
 			const char *basepath = !ch->path[1] ? "" : ch->path;
 
 			fullpath = g_strdup_printf("%s/%s", basepath, name);
-			cache_add_attr(fullpath, stbuf);
+			cache_add_attr(fullpath, stbuf, ch->wrctr);
 			g_free(fullpath);
 		}
 	}
@@ -299,6 +323,7 @@ static int cache_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler)
 	ch.h = h;
 	ch.filler = filler;
 	ch.dir = g_ptr_array_new();
+	ch.wrctr = cache_get_write_ctr();
 	err = cache.next_oper->cache_getdir(path, &ch, cache_dirfill);
 	g_ptr_array_add(ch.dir, NULL);
 	dir = (char **) ch.dir->pdata;
@@ -421,7 +446,7 @@ static int cache_write(const char *path, const char *buf, size_t size,
 {
 	int res = cache.next_oper->oper.write(path, buf, size, offset, fi);
 	if (res >= 0)
-		cache_invalidate(path);
+		cache_invalidate_write(path);
 	return res;
 }
 
@@ -449,9 +474,10 @@ static int cache_fgetattr(const char *path, struct stat *stbuf,
 {
 	int err = cache_get_attr(path, stbuf);
 	if (err) {
+		uint64_t wrctr = cache_get_write_ctr();
 		err = cache.next_oper->oper.fgetattr(path, stbuf, fi);
 		if (!err)
-			cache_add_attr(path, stbuf);
+			cache_add_attr(path, stbuf, wrctr);
 	}
 	return err;
 }

cache.h

@@ -24,5 +24,6 @@ struct fuse_cache_operations {
 
 struct fuse_operations *cache_init(struct fuse_cache_operations *oper);
 int cache_parse_options(struct fuse_args *args);
-void cache_add_attr(const char *path, const struct stat *stbuf);
+void cache_add_attr(const char *path, const struct stat *stbuf, uint64_t wrctr);
 void cache_invalidate(const char *path);
+uint64_t cache_get_write_ctr(void);

configure.ac

@@ -1,4 +1,4 @@
-AC_INIT(sshfs-fuse, 1.9)
+AC_INIT(sshfs-fuse, 2.4)
 AM_INIT_AUTOMAKE
 AM_CONFIG_HEADER(config.h)
 
@@ -30,14 +30,14 @@ if test -z "$enable_sshnodelay"; then
 	fi
 fi
 
-if test "$enable_sshnodelay" != "no"; then
+if test "$enable_sshnodelay" = "yes"; then
 	AC_DEFINE(SSH_NODELAY_WORKAROUND, 1, [Compile ssh NODELAY workaround])
 fi
 
-AM_CONDITIONAL(SSH_NODELAY_SO, test "$enable_sshnodelay" != "no")
+AM_CONDITIONAL(SSH_NODELAY_SO, test "$enable_sshnodelay" = "yes")
 
 export PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH
-PKG_CHECK_MODULES(SSHFS, [fuse >= 2.2 glib-2.0 gthread-2.0])
+PKG_CHECK_MODULES(SSHFS, [fuse >= 2.3 glib-2.0 gthread-2.0])
 have_fuse_opt_parse=no
 oldlibs="$LIBS"
 LIBS="$LIBS $SSHFS_LIBS"

sshfs.1

@@ -0,0 +1,277 @@
+.TH SSHFS "1" "April 2008" "SSHFS version 2.0" "User Commands"
+.SH NAME
+SSHFS \- filesystem client based on ssh
+.SH SYNOPSIS
+.SS mounting
+.TP
+\fBsshfs\fP [\fIuser\fP@]\fBhost\fP:[\fIdir\fP] \fBmountpoint\fP [\fIoptions\fP]
+.SS unmounting
+.TP
+\fBfusermount -u mountpoint\fP
+.SH DESCRIPTION
+SSHFS (Secure SHell FileSystem) is a file system for Linux (and other
+operating systems with a FUSE implementation, such as Mac OS X or FreeBSD)
+capable of operating on files on a remote computer using just a secure
+shell login on the remote computer. On the local computer where the SSHFS
+is mounted, the implementation makes use of the FUSE (Filesystem in
+Userspace) kernel module. The practical effect of this is that the end user
+can seamlessly interact with remote files being securely served over SSH
+just as if they were local files on his/her computer. On the remote
+computer the SFTP subsystem of SSH is used.
+.PP
+If \fIhost\fP is a numeric IPv6 address, it needs to be enclosed in
+square brackets.
+.SH OPTIONS
+.SS "general options:"
+.TP
+\fB\-o\fR opt,[opt...]
+mount options
+.TP
+\fB\-h\fR   \fB\-\-help\fR
+print help
+.TP
+\fB\-V\fR   \fB\-\-version\fR
+print version
+.SS "SSHFS options:"
+.TP
+\fB\-p\fR PORT
+equivalent to '\-o port=PORT'
+.TP
+\fB\-C\fR
+equivalent to '\-o compression=yes'
+.TP
+\fB\-F\fR ssh_configfile
+specifies alternative ssh configuration file
+.TP
+\fB\-1\fR
+equivalent to '\-o ssh_protocol=1'
+.TP
+\fB\-o\fR reconnect
+reconnect to server
+.TP
+\fB\-o\fR delay_connect
+delay connection to server
+.TP
+\fB\-o\fR sshfs_sync
+synchronous writes
+.TP
+\fB\-o\fR no_readahead
+synchronous reads (no speculative readahead)
+.TP
+\fB\-o\fR sshfs_debug
+print some debugging information
+.TP
+\fB\-o\fR cache=BOOL
+enable caching {yes,no} (default: yes)
+.TP
+\fB\-o\fR cache_timeout=N
+sets timeout for caches in seconds (default: 20)
+.TP
+\fB\-o\fR cache_X_timeout=N
+sets timeout for {stat,dir,link} cache
+.TP
+\fB\-o\fR workaround=LIST
+colon separated list of workarounds
+.RS 8
+.TP
+none
+no workarounds enabled
+.TP
+all
+all workarounds enabled
+.TP
+[no]rename
+fix renaming to existing file (default: off)
+.TP
+[no]nodelaysrv
+set nodelay tcp flag in ssh (default: off)
+.TP
+[no]truncate
+fix truncate for old servers (default: off)
+.TP
+[no]buflimit
+fix buffer fillup bug in server (default: on)
+.RE
+.TP
+\fB\-o\fR idmap=TYPE
+user/group ID mapping, possible types are:
+.RS 8
+.TP
+none
+no translation of the ID space (default)
+.TP
+user
+only translate UID of connecting user
+.TP
+file
+translate UIDs/GIDs based upon the contents of \fBuidfile \fR and
+\fBgidfile\fR
+.RE
+.TP
+\fB\-o\fR uidfile=FILE
+file containing username:uid mappings for \fBidmap=file\fR
+.RE
+.TP
+\fB\-o\fR gidfile=FILE
+file containing groupname:gid mappings for \fBidmap=file\fR
+.RE
+.TP
+\fB\-o\fR nomap=TYPE
+with idmap=file, how to handle missing mappings
+.RS 8
+.TP
+ignore
+don't do any re-mapping
+.TP
+error
+return an error (default)
+.RE
+.TP
+\fB\-o\fR ssh_command=CMD
+execute CMD instead of 'ssh'
+.TP
+\fB\-o\fR ssh_protocol=N
+ssh protocol to use (default: 2)
+.TP
+\fB\-o\fR sftp_server=SERV
+path to sftp server or subsystem (default: sftp)
+.TP
+\fB\-o\fR directport=PORT
+directly connect to PORT bypassing ssh
+\fB\-o\fR slave
+communicate over stdin and stdout bypassing network
+.TP
+\fB\-o\fR transform_symlinks
+transform absolute symlinks to relative
+.TP
+\fB\-o\fR follow_symlinks
+follow symlinks on the server
+.TP
+\fB\-o\fR no_check_root
+don't check for existence of 'dir' on server
+.TP
+\fB\-o\fR password_stdin
+read password from stdin (only for pam_mount!)
+.TP
+\fB\-o\fR SSHOPT=VAL
+ssh options (see man ssh_config)
+.SS "FUSE options:"
+.TP
+\fB\-d\fR   \fB\-o\fR debug
+enable debug output (implies \fB\-f\fR)
+.TP
+\fB\-f\fR
+foreground operation
+.TP
+\fB\-s\fR
+disable multi\-threaded operation
+.TP
+\fB\-o\fR allow_other
+allow access to other users
+.TP
+\fB\-o\fR allow_root
+allow access to root
+.TP
+\fB\-o\fR nonempty
+allow mounts over non\-empty file/dir
+.HP
+\fB\-o\fR default_permissions
+enable permission checking by kernel
+.TP
+\fB\-o\fR fsname=NAME
+set filesystem name
+.TP
+\fB\-o\fR subtype=NAME
+set filesystem type
+.TP
+\fB\-o\fR large_read
+issue large read requests (2.4 only)
+.TP
+\fB\-o\fR max_read=N
+set maximum size of read requests
+.TP
+\fB\-o\fR hard_remove
+immediate removal (don't hide files)
+.TP
+\fB\-o\fR use_ino
+let filesystem set inode numbers
+.TP
+\fB\-o\fR readdir_ino
+try to fill in d_ino in readdir
+.TP
+\fB\-o\fR direct_io
+use direct I/O
+.TP
+\fB\-o\fR kernel_cache
+cache files in kernel
+.TP
+\fB\-o\fR [no]auto_cache
+enable caching based on modification times
+.TP
+\fB\-o\fR umask=M
+set file permissions (octal)
+.TP
+\fB\-o\fR uid=N
+set file owner
+.TP
+\fB\-o\fR gid=N
+set file group
+.TP
+\fB\-o\fR entry_timeout=T
+cache timeout for names (1.0s)
+.TP
+\fB\-o\fR negative_timeout=T
+cache timeout for deleted names (0.0s)
+.TP
+\fB\-o\fR attr_timeout=T
+cache timeout for attributes (1.0s)
+.TP
+\fB\-o\fR ac_attr_timeout=T
+auto cache timeout for attributes (attr_timeout)
+.TP
+\fB\-o\fR intr
+allow requests to be interrupted
+.TP
+\fB\-o\fR intr_signal=NUM
+signal to send on interrupt (10)
+.TP
+\fB\-o\fR modules=M1[:M2...]
+names of modules to push onto filesystem stack
+.TP
+\fB\-o\fR max_write=N
+set maximum size of write requests
+.TP
+\fB\-o\fR max_readahead=N
+set maximum readahead
+.TP
+\fB\-o\fR async_read
+perform reads asynchronously (default)
+.TP
+\fB\-o\fR sync_read
+perform reads synchronously
+.SS "Module options:"
+.TP
+[subdir]
+.TP
+\fB\-o\fR subdir=DIR
+prepend this directory to all paths (mandatory)
+.TP
+\fB\-o\fR [no]rellinksa
+transform absolute symlinks to relative
+.TP
+[iconv]
+.TP
+\fB\-o\fR from_code=CHARSET
+original encoding of file names (default: UTF-8)
+.TP
+\fB\-o\fR to_code=CHARSET
+new encoding of the file names (default: ISO-8859-2)
+.PD
+.SH "AUTHORS"
+.LP
+SSHFS has been written by Miklos Szeredi <miklos@szeredi.hu>.
+.LP
+This man page was written by Bartosz Fenski <fenio@debian.org> for the
+Debian GNU/Linux distribution (but it may be used by others).
+
+