Released 2.7

Restore FAQ file

.gitignore

@@ -20,6 +20,7 @@ Makefile
 *.m4
 stamp-h*
 config.*
+sshfs.1
 /sshfs
 /ltmain.sh
 /configure

AUTHORS

@@ -1 +1,29 @@
-Miklos Szeredi     <miklos@szeredi.hu>
+Current Maintainer
+------------------
+
+Nikolaus Rath <Nikolaus@rath.org>
+
+
+Past Maintainers
+----------------
+
+Miklos Szeredi <miklos@szeredi.hu> (until 12/2015)
+
+
+Contributors (autogenerated list)
+---------------------------------
+
+Alan Jenkins <alan.christopher.jenkins@gmail.com>
+Alexander Neumann <alexander@bumpern.de>
+Benjamin Fleischer <fleiben@gmail.com>
+Chris Wolfe <cwolfe@chromium.org>
+gala <gala132@users.noreply.github.com>
+George Vlahavas <vlahavas@gmail.com>
+Julio Merino <jmmv@google.com>
+Julio Merino <jmmv@meroh.net>
+Mike Kelly <mike@pair.com>
+Miklos Szeredi <miklos@szeredi.hu>
+Miklos Szeredi <mszeredi@suse.cz>
+Nikolaus Rath <Nikolaus@rath.org>
+Percy Jahn <email@percyjahn.de>
+Qais Patankar <qaisjp@gmail.com>

ChangeLog

@@ -1,597 +1,148 @@
-2014-01-14  Miklos Szeredi <miklos@szeredi.hu>
+Release 2.6 (2015-03-01)
+------------------------
 
-	* Released 2.5
+* Integrated osxfuse's copy of sshfs, which means that sshfs now works
+  on OS X out of the box.
+* Added -o cache_max_size=N option to let users tune the maximum size of
+  the cache in number of entries.
+* Added -o cache_clean_interval=N and -o cache_min_clean_interval=N
+  options to let users tune the cleaning behavior of the cache.
 
-2014-01-08  Miklos Szeredi <miklos@szeredi.hu>
+Release 2.6 (2015-01-28)
+------------------------
 
-	* Add -o disable_hardlink option (debian bug #670926).  Reported
-	by Louis-David Mitterrand
+* New maintainer (Nikolaus Rath <Nikolaus@rath.org>)
 
-	* Optimize readdir by sending multiple requests in parallel.  Add
-	-o sync_readdir to restore old behavior.  Patch by Alexander
-	Neumann
+Release 2.5 (2014-01-14)
+------------------------
 
-2014-01-07  Miklos Szeredi <miklos@szeredi.hu>
+* Some performance improvements for large directories.
+* New `disable_hardlink` option.
+* Various small bugfixes.
 
-	* Map SSH2_FX_FAILURE to ENOTEMPTY for rmdir.  Reported by Ross
-	Lagerwall
+Release 2.4 (2012-03-08)
+------------------------
 
-2012-05-14  Miklos Szeredi <miklos@szeredi.hu>
+* New `slave` option.
+* New `idmap`, `uidmap` and `gidmap` options.  
+* Various small bugfixes.
 
-	* When checking root directory use LSTAT not STAT.  This prevents
-	I/O error being returned after a successful mount if a symlink is
-	mounted.  Reported by Bart Friederichs
+Release 2.3 (2011-07-01)
+------------------------
 
-2012-03-08  Miklos Szeredi <miklos@szeredi.hu>
+* Support hard link creation if server is OpenSSH 5.7 or later
+* Small improvements and bug fixes  
+* Check mount point and options before connecting to ssh server
+* New 'delay_connect' option
 
-	* Released 2.4
+Release 2.2 (2008-10-20)
+------------------------
 
-2012-03-08  Miklos Szeredi <miklos@szeredi.hu>
+* Handle numerical IPv6 addresses enclosed in square brackets
+* Handle commas in usernames
 
-	* 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
+Release 2.1 (2008-07-11)
+------------------------
 
-2012-02-08  Chris Wolfe <cwolfe@chromium.org>
+* Small improvements and bug fixes  
 
-	* Add -o slave. This option routes the sftp communication over stdin
-	and stdout, bypassing SSH and network.
+Release 2.0 (2008-04-23)
+------------------------
 
-2011-12-16  Mike Kelly <mike@pair.com>
+* Support password authentication with pam_mount
 
-	* 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.
+* Support atomic renames if server is OpenSSH 4.9 or later
 
-2011-11-25  Miklos Szeredi <miklos@szeredi.hu>
+* Support getting disk usage if server is OpenSSH 5.1 or later
 
-	* Make chown respect the UID mapping policy.  Reported and tested
-	by Vivenzio Pagliari
+* Small enhancements and bug fixes
 
-2011-11-16  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.9
+------------------
 
-	* 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
+* Fix a serious bug, that could result in sshfs hanging, crashing, or
+  reporting out-of-memory
 
-2011-11-14  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.8
+------------------
 
-	* Fix double free if reconnection races with request sending.
-	Patch by E. Kuemmerle
+* Bug fixes
 
-	* Add locking around modifver and connver
+What is new in 1.7
+------------------
 
-2011-10-21  Miklos Szeredi <miklos@szeredi.hu>
+* Tolerate servers which print a banner on login
 
-	* Remove "-oPreferredAuthentications" from ssh options if the
-	"password_stdin" option is used.  Reported by E. Kuemmerle
+* Small improvements
 
-2011-08-24  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.6
+------------------
 
-	* Add "-oworkaround=fstat" for SFTP servers which don't support
-	the FSTAT message.  Patch by: Percy Jahn
+* Workaround for missing truncate operation on old sftp servers
 
-2011-07-01  Miklos Szeredi <miklos@szeredi.hu>
+* Bug fixes
 
-	* Released 2.3
+What is new in 1.5
+------------------
 
-2011-07-01  Miklos Szeredi <miklos@szeredi.hu>
+* Improvements to read performance.  Now both read and write
+  throughput should be very close to 'scp'
 
-	* Add hard link operation.  Works if the server supports the
-	"hardlink@openssh.com" protocol extension.
+* If used with FUSE 2.6.0 or later, then perform better data caching.
+  This should show dramatic speed improvements when a file is opened
+  more than once
 
-2011-03-25  Miklos Szeredi <miklos@szeredi.hu>
+* Bug fixes
 
-	* Fix possible deadlock on reconnection.  Reported by Florian
-	Zumbiehl
+What is new in 1.4
+------------------
 
-2011-01-25  Miklos Szeredi <miklos@szeredi.hu>
+* Updated to version 25 of libfuse API
 
-	* Fix cleanup when ssh connection is terminated.  This prevents
-	sshfs hanging when the server is rebooted, for example.
+* This means that the 'cp' of readonly file to sshfs bug is finally
+  solved (as long as using libfuse 2.5.0 or later *and* Linux 2.6.15
+  or later)
 
-2010-03-16  Miklos Szeredi <miklos@szeredi.hu>
+* Sshfs now works on FreeBSD
 
-	* Set FD_CLOEXEC on fuse device.  This prevents deadlocks that
-	happen in some circumstances (bugzilla.kernel.org #12864).
-	Reported by Tim Connors
+* Added option to "transform" absolute symbolic links
 
-2009-07-15  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.3
+------------------
 
-	* 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
+* Add workaround for failure to rename to an existing file
 
-	* 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
+* Simple user ID mapping
 
-	* Allow mounting a single non-directory from the server
+* Estimate disk usage of files based on size
 
-2009-07-15  Sebastian Dransfeld <sebastid@tango.flipp.net>
+* Report "infinite" disk space
 
-	* Add option 'delay_connect': This will always create the sshfs mount,
-	even if the connection to the server can't be established.
+* Bug fixes
 
-2009-01-27  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.2
+------------------
 
-	* Print usage information and version to stdout, not stderr.
-	Libfuse also needs to be fixed up.  Reported by Kārlis Repsons
+* Better compatibility with different sftp servers
 
-2008-10-20  Miklos Szeredi <miklos@szeredi.hu>
+* Automatic reconnect (optional)
 
-	* Released 2.2
+What is new in 1.1
+------------------
 
-2008-10-20  Miklos Szeredi <miklos@szeredi.hu>
+* Performance improvements:
 
-	* Escape commas in fsname option if libfuse supports it
+   - directory content caching
 
-2008-10-08  Miklos Szeredi <miklos@szeredi.hu>
+   - symlink caching
 
-	* Handle numerical IPv6 addresses enclosed in square brackets.
-	Reported by Andre-John Mas
+   - asynchronous writeback
 
-	* Fix error if username contains a comma character.  Reported by
-	Yang Zhang
+   - readahead
 
-	* Fix harmless glib assertations with "cache=no"
+* Fixed '-p' option
 
-2008-07-11  Miklos Szeredi <miklos@szeredi.hu>
+What is new in 1.0
+------------------
 
-	* 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
-
-2007-12-12  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix checking for fuse_opt_parse in configure
-
-2007-12-11  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fill in st_ctime attribute with st_mtime, instead of leaving it
-	zero
-
-	* Check for OpenSSH version >= 4.4, and if found, don't build the
-	sshnodelay.so workaround
-
-2007-12-10  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix crash on writing files, caused by missing locking around
-	sshfs_file_get()
-
-	* Don't time requests when not debugging
-
-	* Add subtype support with libfuse >= 2.7.0
-
-	* Abort on allocation failure instead of exit
-
-	* Correctly show default of nodelaysrv workaround in help message
-
-2007-05-16  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.8
-
-2007-05-15  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add needed g_thread_init() to fix rare crashes.  Reported by
-	Dimitrios Apostolou
-
-	* Fix memory leak in sshfs_open_common()
-
-2007-04-18  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix crash within gdb, caused by sem_wait() returning with an
-	error on interrupt.  Reported by Dimitrios Apostolou
-
-	* Fix spurious cache entries remaining after renaming a directory
-
-2007-02-28  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Don't set DISPLAY environment variable to "", because it breaks
-	ssh-askpass.  Make nodelaysrv_workaround default to off, because
-	with this change it may have security implications.
-
-2007-02-19  Miklos Szeredi <miklos@szeredi.hu>
-
-	* OpenSSH sftp-server can read requests faster, than it processes
-	them, when it's buffer is full it aborts.  This can happen on a
-	large upload to a slow server.  Work around this by limiting the
-	total size of outstanding reqests.  Debian bug #365541.  Tracked
-	down by Thue Janus Kristensen
-
-	* Add --disable-sshnodelay configure option.  The sshnodelay.so
-	hack shouldnt be needed with OpenSSH client versions >= 4.3
-
-2006-12-20  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Work around write performace issues due to missing TCP_NODELAY
-	in sshd.  Reported by Justin Searle
-
-2006-11-10  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix bug which ommitted directory entries for symlinks with the
-	-ofollow_symlinks option.  Bug reported by Mikael Ståldal
-
-2006-09-29  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix segfault if there are outstanding writes to the server after
-	release on the file descriptor.  This only happened on FreeBSD.
-	Reported by Andriy Gapon
-
-2006-08-18  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.7
-
-2006-08-17  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Cosmetics on bogus statfs numbers
-
-2006-08-16  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add option 'follow_symlinks' to resolve symlinks on the server.
-
-	* On setups where the login shell prints a banner, the sftp
-	protocol was confused, and bailed out with "reply len too large:
-	...".  So iterate over any rubbish read immediately after login
-	until a valid reply is found.
-
-	* Check remote directory for existence before mounting.  Closes
-	Ubuntu bug #46633
-
-2006-03-10  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Use socketpair() instead of pipe() for communication between ssh
-	and sshfs.  Patch from Csaba Henk
-
-	* Update to FUSE interface version 26
-
-2006-03-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.6
-
-2006-03-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix segfault if remote host is down and reconnection is enabled
-
-2006-03-08  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix bug in symlink transformation.  Reported by Ralf Hoffmann
-
-2006-02-24  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add workaround for broken truncate on old sftp servers.  Can be
-	enabled with '-oworkaround=truncate'.  Patch from Joseph M Link
-
-2006-02-23  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Avoid double memcpy on writes.  Patch by Joseph M Link
-
-	* More memory copy avoidance
-
-2006-02-22  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add -fPIC to the comile flags of sshnodelay.so.  Reported by
-	Anthony Kolasny
-
-2006-02-20  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.5
-
-2006-02-19  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix compilation with old FUSE versions.  Report by Kurt George
-	Gjerde
-
-2006-02-16  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Block TERM/INT/HUP/QUIT signals in sshfs reading thread, so they
-	will always be received by the FUSE main thread.  Fixes the
-	"double ^C" problem seen on FreeBSD.
-
-	* Use 'auto_cache' option if available, so that file cache is not
-	thrown away on each open.  This should make repeated reading of a
-	file much much faster.
-
-2006-01-31  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix problems with nodelay workaround on FreeBSD.
-
-2006-01-30  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix data consitency bug if readahead is enabled and writes are
-	intermixed with reads.  Solution is far from optimal, since it
-	will prevent readahead in the above situation.  If used with FUSE
-	>= 2.6.0 with Linux-2.6.X, readahead will be done by the kernel,
-	and hence there will be no performance penalty.  Bug reported and
-	test program written by Wolfgang Köbler.  Further testing on
-	FreeBSD by Csaba Henk
-
-2006-01-29  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add '-olarge_read' option for Linux-2.4.*.  This should
-	generally improve download performance
-
-2006-01-27  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add workaround (enabled by default) for ssh clients not setting
-	TCP_NODELAY on the network connection.  Currently this is all
-	known versions of openssh.  This may improve download speed in
-	some circumstances
-
-	* Make it possible to idividually disable workarounds with a "no"
-	prefix
-
-	* Change '-otransform_symlinks' not to prefix with the mountpoint
-	(which is fragile wrt. moving/binding the mount).  Rather convert
-	absolute symlinks to relative if possible.  Does not yet work if
-	base path is itself relative
-
-2006-01-25  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Use TCP_NODELAY socket option for direct connection.  This may
-	improve download speed in some circumstances
-
-2006-01-20  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Update to fuse API 2.6
-
-	* Don't do readahead in sshfs if it's done in kernel
-
-2006-01-14  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.4
-
-2006-01-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Added 'transform_symlinks' option to "fix-up" absolute symlinks.
-	Patch by Paul Jarc
-
-	* Add option parsing implementation, so linking with older than
-	2.5.0 libfuse still works.
-
-2005-12-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Use new option parsing interface of FUSE
-
-2005-11-28  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Set statvfs::f_frsize
-
-2005-11-23  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix warnings on 64bit systems.  Reported by D. R. Evans
-
-2005-11-16  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Replace EPROTO with the more portable EIO
-
-	* Fix bug in option parsing.  Reported by Csaba Henk
-
-2005-10-29  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Use FUSE version 25 if available
-
-	* Add <sys/socket.h> include.  Reported by Csaba Henk
-
-2005-10-29  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.3
-
-2005-10-28  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add atomic create+open and ftruncate operation.  This should fix
-	issues with 'cp' and other programs failing with "Permission
-	denied".  To be effective, needs FUSE version 2.5 and kernel
-	version 2.6.15 (just a guess, since neither of them is released
-	yet).
-
-2005-10-27  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add support for SSH protocol version 1.  Bug reported by Miklos
-	Bagi Jr.
-
-2005-10-26  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix typo (ConnectTimeout -> ConnectionTimeout) in ssh options.
-	Bug reported by Miklos Bagi Jr.
-
-2005-10-19  Miklos Szeredi <miklos@szeredi.hu>
-
-	* GNOME Nautilus fails to copy file to sshfs filesystem, because
-	FUSE returns zero free space.  So instead return huge (999999999
-	kbytes) amount of free space, yet it should be obvious that the
-	number is artificial.  Bug report by Peter Kronheimer
-
-2005-10-18  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add remote uid detection and translation ('idmap=user' option).
-	Idea and implementation details worked out by Jean-Marc Valin
-
-2005-10-17  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add one more missing lock.
-
-	* Add workaround for failure to rename to an existing file.  Based
-	on patch by Michael Best
-
-2005-10-15  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Protect request ID allocation with mutex.  Bug report by Tvrtko
-	Ursulin
-
-2005-08-17  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Try to calculate approximate disk usage of files from their
-	size, so that 'du' returns meaningful results.  Problem reported
-	by Bernd Amend.
-
-2005-08-15  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.2
-
-2005-08-13  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add 'reconnect' option, which tries to reconnect to the server
-	when the connection is broken.  If a password is required for
-	connection, it is recommended that you install ssh-askpass, and
-	set the SSH_ASKPASS environment variable (see 'man ssh' for more
-	details).
-
-2005-05-05  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Work around missing truncate() support in some older sftp
-	servers (only works for zero size truncate).  Thanks to Eduard
-	Czimbalmos for the bug report and help with testing
-
-2005-04-13  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Fix compilation with gcc-2.95.  Reported by David A. Gershman
-
-2005-03-08  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Make it work on server version 2 (e.g. Sun_SSH_1.0.1).  Report
-	and testing by Pieter J. Kersten
-
-2005-03-04  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.1
-
-2005-03-03  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Slightly optimize readahead.  Still not clever enough to always
-	keep the pipe filled.
-
-	* Add 'sshfs_debug' option
-
-2005-02-17  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Parse 'max_read' mount option and if smaller than 65536 forward
-	to FUSE
-
-2005-02-16  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Added simple readahead (big performance gain in case of
-	sequential read pattern).  Can be disabled with '-o no_readahead'
-
-2005-02-14  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Added asynchronous writeback (big performance gain) and made
-	this the default.  Can be disabled with '-o sshfs_sync'
-
-2005-02-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Added option to start arbitary command instead of 'ssh'
-
-	* Re-added '-p PORT' as a convenience option, also '-C' works as
-	in ssh.
-
-2005-02-08  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Add caching of symlinks
-
-	* Add support for many ssh options to be passed to ssh
-
-	* Port number can now actually be specified with "-o port=PORT",
-	bug spotted by Andrew Ukrainec
-
-2005-02-07  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Separate attribute caching to a separate layer
-
-	* Add caching of directory contents
-
-2005-02-03  Miklos Szeredi <miklos@szeredi.hu>
-
-	Fix PKG_CONFIG_PATH setting in configure.ac (reported by Alpar
-	Juttner)
-
-2005-01-09  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Released 1.0
-
-2004-12-04  Miklos Szeredi <miklos@szeredi.hu>
-
-	* Started ChangeLog
+* Initial release

FAQ

@@ -0,0 +1,263 @@
+SSHFS FAQ
+=========
+
+1.     I've found a bug and there's no solution in this FAQ, what
+       should I do?
+2.     Advantage of sshfs over NFS and Samba
+3.     Create the device node
+4.     mv fails with "Operation not permitted"
+5.     cvs fails with "cvs [status aborted]: cannot get working
+       directory: No such file or directory" in a sshfs mounted directory
+6.     Changes on the server are not immediately visible in the
+       mounted directory.
+7.     Configuring the ssh connection
+8.     What are the no_readahead and sshfs_sync options for?
+9.    Why does df return strange values on partitions mounted via
+       sshfs?
+10.    How do I specify the remote mount point (since the example
+       defaults to the home directory)
+11.    sshfs hangs after a while
+12.    Following symlinks on the server side
+13.    Making absolute symlinks work
+14.    Mounting as root
+15.    Exporting via NFS
+16.    Automatical mounting using /etc/fstab
+17.    Why does SVN (etc...) fail with permission denied?
+18.    Why does SVN (etc...) fail to rename files?
+19.    Is there some neat way to do it in reverse?
+20.    Might it be reasonable to disallow loops?
+21.    How to mount through an intermediary ssh server, eg:
+       localhost -> A -> B; mount B from localhost
+22.    Alternative Solution
+23.    I seem to have successfully mounted a remote directory, but
+       performing an `ls -l` on the directory above the mount point shows
+       the mount point's attributes as `? ? ? ? ? ?`. Nothing shows up in
+       the directory either. What am I doing wrong?
+
+--------------------------------------------------------------------------
+
+1. I've found a bug and there's no solution in this FAQ, what should I do?
+
+   Please report the bug in the Github issue tracker:
+   https://github.com/libfuse/sshfs/issues
+
+   Also logs with debugging output can be useful for diagnosing the
+   problem. Try running sshfs with the following options:
+     sshfs -odebug,sshfs_debug,loglevel=debug ...
+
+   Doing strace on the application which fails may also sometimes help:
+     strace -f -o /tmp/strace application args ...
+
+   Note that large messages (over 40k) will be rejected from the mailing
+   list. So try to keep the logs as short as possible.
+
+
+2. Advantage of sshfs over NFS and Samba
+
+   Users can mount remote resources they already have ssh access to,
+   without requiring the remote machine to export the resource.
+
+   The remote resource can be mounted when it is needed in a location
+   that is convenient for the user at that time, without needing to rely
+   on a central, root-controlled file system table.
+
+   Automatic mounting, if desired, can be added to a shell script such as
+   .bashrc (provided authentication is done using RSA/DSA keys).
+
+   Resources can be mounted over slow and unreliable (distant)
+   connections.
+
+3. Create the device node
+
+   If you don't use udev, you may get this error message:
+
+   fusermount: failed to open /dev/fuse: No such device or address
+
+   Before loading the fuse kernel module, create the device node
+   manually:
+
+     mknod -m 666 /dev/fuse c 10 229
+
+4. mv fails with "Operation not permitted".
+
+   Use -o workaround=rename (requires sshfs version >= 1.3).
+
+5. cvs fails with "cvs status aborted?: cannot get working directory: No such
+   file or directory" in a sshfs mounted directory
+
+   Use the -oreaddir_ino option. Example:
+     sshfs -oreaddir_ino hostname:remote_dir mount_point
+
+6. Changes on the server are not immediately visible in the mounted directory.
+
+   By default, sshfs caches things for 20 seconds, use -o cache_timeout=N
+   to change the default cache timeout (in seconds) or -o cache=no for
+   disabling the cache.
+
+   You can also control cache timeouts for directory listing etc with
+   -o cache_stat_timeout=N,
+   -o cache_dir_timout=N, and
+   -o cache_link_timout=N.
+
+7. Configuring the ssh connection
+
+   In addition to flags like -C, -p, and -o SSHOPT...=, you may find it
+   easier to edit your /.ssh/config file. You can add an entry with any
+   customization you want, test it with ssh, and finally use it with
+   sshfs. As a bonus, you get a short mnemonic for your configuration.
+
+8. What are the no_readahead and sshfs_sync options for?
+
+   These disable read and write optimizations respectively. They don't
+   really make sense unless you're doing something special.
+
+9. Why does df return strange values on partitions mounted via sshfs?
+
+   Because the SFTP protocol doesn't have a statfs operation this is
+   currently not possible to display proper usage on remote partition.
+
+10. How do I specfy the remote mount point (since the example defaults to the
+    home directory)
+
+    The example shows:
+      sshfs hostname: mountpoint
+
+    To specify a remote mount point use:
+      sshfs hostname:remotemountpoint mountpoint
+
+    This might be obvious to others, but I ended up looking up the
+    interface to sftp to see if I could learn how to specify the remote
+    mount point, then thought about the way that scp specifies the remote
+    directory, and it worked.
+
+11. sshfs hangs after a while
+
+    Mounting works fine, I can use the files in Mountpoint as good as any
+    other files on my system, but after bit of time, changing nothing on
+    the remote files sshfs crashes. This means, I can not cd into the
+    Mountpoint (xterm hangs, nautilus hangs... every program trying to
+    access the Mountpoint gets stuck, and won't return).
+
+    Solution: add
+      ServerAliveInterval 15
+
+    in your .ssh/config (or use -o ServerAliveInterval=15 on the sshfs
+    command line but I did not test that solution). This will force the
+    ssh connection to stay alive even if you have no activity.
+
+12. Following symlinks on the server side
+
+    The -o follow_symlinks option will enable this.
+
+13. Making absolute symlinks work
+
+    Use the -o transform_symlinks option, which will transform absolute
+    symlinks (ones which point somewhere inside the mount) into relative
+    ones.
+
+14. Mounting as root
+
+    Generally it's not possible to use an sshfs mount as a "real"
+    filesystem shared between multiple users. Some of this functionality
+    can be enabled with the -o allow_other and -o default_permissions
+    options, but files will not be created with the correct ownership,
+    etc...
+
+15. Exporting via NFS
+
+    Use the userspace NFS daemon http://sourceforge.net/projects/unfs
+
+16. Automatical mounting using /etc/fstab
+
+    A line in /etc/fstab has the following format:
+      sshfs#USERNAME@REMOTE_HOST:REMOTE_PATH MOUNT_POINT fuse SSHFS_OPTIONS 0 0
+
+    eg.
+      sshfs#guest@guest.login.com:data /mnt/guest fuse \
+        uid=1003,gid=100,umask=0,allow_other 0 0
+
+17. Why does SVN (etc...) fail with permission denied?
+
+    This is a bug that happens when an application creates a read-only
+    file opened for writing (e.g. open("foo", O_WRONLY|O_CREAT, 0444))
+
+    It has been fixed in sshfs version 1.3, but also requires FUSE version
+    >=2.5.X and Linux kernel version >=2.6.15.
+
+18. Why does SVN (etc...) fail to rename files?
+
+    $ svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdelibs
+    svn: Can't move 'kdelibs/.svn/tmp/entries' to 'kdelibs/.svn/entries':
+    Operation not permitted
+
+    The reason is that SFTP protocol version 3 (which is implemented by
+    OpenSSH's sftp-server) defines the rename operation slightly
+    differently than POSIX. The difference is that renaming to an existing
+    file or directory will fail instead of atomically replacing the old
+    file.
+
+    The -o workaround=rename option will try to emulate POSIX rename
+    semantics, but it cannot guarantee atomicity. In most of the cases
+    this doesn't matter, and things will work fine with this option.
+
+19. Is there some neat way to do it in reverse?
+
+    You want to mount a USB thumb drive onto a file server that is rather
+    remote.
+
+    Assuming this is difficult because the laptop with the thumb drive is
+    sitting behind NAT, firewalls, etc. then you need to create a
+    port-forward:
+      client$ ssh -R 2222:localhost:22 server
+      server$ sshfs -p 2222 localhost:/media/usb1 myusb1
+
+    (Now, is there is there a smarter way that does not involve port
+    opening login permissions in an undesireable direction?)
+
+20. Might it be reasonable to disallow loops?
+
+    sshfs localhost:/mnt /mnt
+
+    This seems to produce undesirable results. --JoshuaRodman
+
+21. How to mount through an intermediary ssh server, eg: localhost -> A -> B;
+    mount B from localhost
+
+    Start by mounting the folder you need that is on "a" to a folder on
+    "b" then mount the new folder that is on "a" to a folder on localhost.
+
+    IE: (These are NOT real commands, but a sequence of steps.
+    A mounts B:/home/x on /mnt/Bx
+    localhost mounts A:/mnt/Bx on ~/mydir
+
+22. Alternative Solution:
+
+    1) Create a shell script to wrap the tunneling of one ssh command over
+    another,
+      $ cat >Atunnel <<EOF
+      #!/bin/bash
+      ssh -q A ssh -q "$@"
+      EOF
+      $ chmod u+x Atunnel
+
+    N.B. make sure to put this somewhere on your path. 2) sshfs mount as
+    normal but using this script as the ssh command.
+      $ sshfs -o ssh_command='Atunnel' B: ~/mydir
+
+23. I seem to have successfully mounted a remote directory, but performing an
+    `ls -l` on the directory above the mount point shows the mount point's
+    attributes as `? ? ? ? ? ?`. Nothing shows up in the directory either. What
+    am I doing wrong?
+
+    You probably specified a remote path with the tilde (~) in it. This
+    doesn't seem to work. Instead, specify an absolute remote path:
+      sshfs username@remote.host:/home/username/whatever my/mount
+
+    What options do i use to make playing media files (music) over sshfs more
+    efficient?
+
+    MacFUSE doesn't seem to let me move files from one directory to another. It
+    first asks for my local user password (i.e. the password on my Macbook Pro)
+    and then produces the error message "The operation cannot be completed
+    because one or more required items cannot be found. (Error code -120).
+

Makefile.am

@@ -6,16 +6,27 @@ sshfs_SOURCES = sshfs.c cache.c cache.h
 if FUSE_OPT_COMPAT
 sshfs_SOURCES += compat/fuse_opt.c compat/fuse_opt.h
 endif
+if DARWIN_COMPAT
+sshfs_SOURCES += compat/darwin_compat.c compat/darwin_compat.h
+endif
 
 sshfs_LDADD = $(SSHFS_LIBS)
 sshfs_CFLAGS = $(SSHFS_CFLAGS)
-sshfs_CPPFLAGS = -D_REENTRANT -DFUSE_USE_VERSION=26 -DLIBDIR=\"$(libdir)\"
+sshfs_CPPFLAGS = -D_REENTRANT -DFUSE_USE_VERSION=26 -DLIBDIR=\"$(libdir)\" \
+                 -DIDMAP_DEFAULT="\"$(IDMAP_DEFAULT)\""
 
-EXTRA_DIST = sshnodelay.c FAQ.txt
-CLEANFILES = sshnodelay.so
+EXTRA_DIST = sshnodelay.c sshfs.1.in
+CLEANFILES = sshnodelay.so sshfs.1 sshfs.1.tmp
 
 dist_man_MANS = sshfs.1
 
+sshfs.1: sshfs.1.in
+	$(AM_V_GEN)sed \
+	    -e 's,__IDMAP_DEFAULT__,$(IDMAP_DEFAULT),g' \
+	    -e 's,__UNMOUNT_COMMAND__,$(UNMOUNT_COMMAND),g' \
+	    <sshfs.1.in >sshfs.1.tmp || exit 1; \
+	mv sshfs.1.tmp sshfs.1
+
 if SSH_NODELAY_SO
 all-local: sshnodelay.so
 

NEWS

@@ -1,112 +0,0 @@
-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
-------------------
-
-* Fix a serious bug, that could result in sshfs hanging, crashing, or
-  reporting out-of-memory
-
-What is new in 1.8
-------------------
-
-* Bug fixes
-
-What is new in 1.7
-------------------
-
-* Tolerate servers which print a banner on login
-
-* Small improvements
-
-What is new in 1.6
-------------------
-
-* Workaround for missing truncate operation on old sftp servers
-
-* Bug fixes
-
-What is new in 1.5
-------------------
-
-* Improvements to read performance.  Now both read and write
-  throughput should be very close to 'scp'
-
-* If used with FUSE 2.6.0 or later, then perform better data caching.
-  This should show dramatic speed improvements when a file is opened
-  more than once
-
-* Bug fixes
-
-What is new in 1.4
-------------------
-
-* Updated to version 25 of libfuse API
-
-* This means that the 'cp' of readonly file to sshfs bug is finally
-  solved (as long as using libfuse 2.5.0 or later *and* Linux 2.6.15
-  or later)
-
-* Sshfs now works on FreeBSD
-
-* Added option to "transform" absolute symbolic links
-
-What is new in 1.3
-------------------
-
-* Add workaround for failure to rename to an existing file
-
-* Simple user ID mapping
-
-* Estimate disk usage of files based on size
-
-* Report "infinite" disk space
-
-* Bug fixes
-
-What is new in 1.2
-------------------
-
-* Better compatibility with different sftp servers
-
-* Automatic reconnect (optional)
-
-What is new in 1.1
-------------------
-
-* Performance improvements:
-
-   - directory content caching
-
-   - symlink caching
-
-   - asynchronous writeback
-
-   - readahead
-
-* Fixed '-p' option
-
-What is new in 1.0
-------------------
-
-* Initial release

README.md

@@ -26,8 +26,7 @@ Latest version
 ==============
 
 The latest version and more information can be found on
-
-  http://fuse.sourceforge.net/sshfs.html
+http://github.com/libfuse/sshfs
 
 
 How to mount a filesystem
@@ -35,7 +34,7 @@ How to mount a filesystem
 
 Once sshfs is installed (see next section) running it is very simple:
 
-  sshfs hostname: mountpoint
+    sshfs hostname: mountpoint
 
 Note, that it's recommended to run it as user, not as root.  For this
 to work the mountpoint must be owned by the user.  If the username is
@@ -47,28 +46,27 @@ is the home directory.
 
 Also many ssh options can be specified (see the manual pages for
 sftp(1) and ssh_config(5)), including the remote port number
-('-oport=PORT')
+(`-oport=PORT`)
 
 To unmount the filesystem:
 
-  fusermount -u moutpoint
+    fusermount -u mountpoint
 
 
 Installing
 ==========
 
-First you need to download FUSE 2.2 or later from:
-
-  http://fuse.sourceforge.net
+First you need to download FUSE 2.2 or later from
+http://github.com/libfuse/libfuse.
 
 You also need to install the devel package for glib2.0.  After
 installing FUSE, compile sshfs the usual way:
 
-  ./configure
-  make
-  make install (as root)
+    ./configure
+    make
+    make install (as root)
 
 And you are ready to go.
 
-If checking out from CVS for the first time also do 'autoreconf -i'
-before doing './configure'.
+If checking out from git for the first time also do `autoreconf -i`
+before doing `./configure`.

cache.c

@@ -14,16 +14,19 @@
 #include <glib.h>
 #include <pthread.h>
 
-#define DEFAULT_CACHE_TIMEOUT 20
-#define MAX_CACHE_SIZE 10000
-#define MIN_CACHE_CLEAN_INTERVAL 5
-#define CACHE_CLEAN_INTERVAL 60
+#define DEFAULT_CACHE_TIMEOUT_SECS 20
+#define DEFAULT_MAX_CACHE_SIZE 10000
+#define DEFAULT_CACHE_CLEAN_INTERVAL_SECS 60
+#define DEFAULT_MIN_CACHE_CLEAN_INTERVAL_SECS 5
 
 struct cache {
 	int on;
-	unsigned stat_timeout;
-	unsigned dir_timeout;
-	unsigned link_timeout;
+	unsigned int stat_timeout_secs;
+	unsigned int dir_timeout_secs;
+	unsigned int link_timeout_secs;
+	unsigned int max_size;
+	unsigned int clean_interval_secs;
+	unsigned int min_clean_interval_secs;
 	struct fuse_cache_operations *next_oper;
 	GHashTable *table;
 	pthread_mutex_t lock;
@@ -70,9 +73,9 @@ static int cache_clean_entry(void *key_, struct node *node, time_t *now)
 static void cache_clean(void)
 {
 	time_t now = time(NULL);
-	if (now > cache.last_cleaned + MIN_CACHE_CLEAN_INTERVAL &&
-	    (g_hash_table_size(cache.table) > MAX_CACHE_SIZE ||
-	     now > cache.last_cleaned + CACHE_CLEAN_INTERVAL)) {
+	if (now > cache.last_cleaned + cache.min_clean_interval_secs &&
+	    (g_hash_table_size(cache.table) > cache.max_size ||
+	     now > cache.last_cleaned + cache.clean_interval_secs)) {
 		g_hash_table_foreach_remove(cache.table,
 					    (GHRFunc) cache_clean_entry, &now);
 		cache.last_cleaned = now;
@@ -172,7 +175,7 @@ void cache_add_attr(const char *path, const struct stat *stbuf, uint64_t wrctr)
 	if (wrctr == cache.write_ctr) {
 		node = cache_get(path);
 		node->stat = *stbuf;
-		node->stat_valid = time(NULL) + cache.stat_timeout;
+		node->stat_valid = time(NULL) + cache.stat_timeout_secs;
 		if (node->stat_valid > node->valid)
 			node->valid = node->stat_valid;
 		cache_clean();
@@ -188,7 +191,7 @@ static void cache_add_dir(const char *path, char **dir)
 	node = cache_get(path);
 	g_strfreev(node->dir);
 	node->dir = dir;
-	node->dir_valid = time(NULL) + cache.dir_timeout;
+	node->dir_valid = time(NULL) + cache.dir_timeout_secs;
 	if (node->dir_valid > node->valid)
 		node->valid = node->dir_valid;
 	cache_clean();
@@ -210,7 +213,7 @@ static void cache_add_link(const char *path, const char *link, size_t size)
 	node = cache_get(path);
 	g_free(node->link);
 	node->link = g_strndup(link, my_strnlen(link, size-1));
-	node->link_valid = time(NULL) + cache.link_timeout;
+	node->link_valid = time(NULL) + cache.link_timeout_secs;
 	if (node->link_valid > node->valid)
 		node->valid = node->link_valid;
 	cache_clean();
@@ -490,6 +493,7 @@ static void cache_unity_fill(struct fuse_cache_operations *oper,
 	cache_oper->init        = oper->oper.init;
 #endif
 	cache_oper->getattr     = oper->oper.getattr;
+	cache_oper->access	= oper->oper.access;
 	cache_oper->readlink    = oper->oper.readlink;
 	cache_oper->getdir      = cache_unity_getdir;
 	cache_oper->mknod       = oper->oper.mknod;
@@ -569,20 +573,28 @@ struct fuse_operations *cache_init(struct fuse_cache_operations *oper)
 static const struct fuse_opt cache_opts[] = {
 	{ "cache=yes", offsetof(struct cache, on), 1 },
 	{ "cache=no", offsetof(struct cache, on), 0 },
-	{ "cache_timeout=%u", offsetof(struct cache, stat_timeout), 0 },
-	{ "cache_timeout=%u", offsetof(struct cache, dir_timeout), 0 },
-	{ "cache_timeout=%u", offsetof(struct cache, link_timeout), 0 },
-	{ "cache_stat_timeout=%u", offsetof(struct cache, stat_timeout), 0 },
-	{ "cache_dir_timeout=%u", offsetof(struct cache, dir_timeout), 0 },
-	{ "cache_link_timeout=%u", offsetof(struct cache, link_timeout), 0 },
+	{ "cache_timeout=%u", offsetof(struct cache, stat_timeout_secs), 0 },
+	{ "cache_timeout=%u", offsetof(struct cache, dir_timeout_secs), 0 },
+	{ "cache_timeout=%u", offsetof(struct cache, link_timeout_secs), 0 },
+	{ "cache_stat_timeout=%u", offsetof(struct cache, stat_timeout_secs), 0 },
+	{ "cache_dir_timeout=%u", offsetof(struct cache, dir_timeout_secs), 0 },
+	{ "cache_link_timeout=%u", offsetof(struct cache, link_timeout_secs), 0 },
+	{ "cache_max_size=%u", offsetof(struct cache, max_size), 0 },
+	{ "cache_clean_interval=%u", offsetof(struct cache,
+	                                      clean_interval_secs), 0 },
+	{ "cache_min_clean_interval=%u", offsetof(struct cache,
+	                                          min_clean_interval_secs), 0 },
 	FUSE_OPT_END
 };
 
 int cache_parse_options(struct fuse_args *args)
 {
-	cache.stat_timeout = DEFAULT_CACHE_TIMEOUT;
-	cache.dir_timeout = DEFAULT_CACHE_TIMEOUT;
-	cache.link_timeout = DEFAULT_CACHE_TIMEOUT;
+	cache.stat_timeout_secs = DEFAULT_CACHE_TIMEOUT_SECS;
+	cache.dir_timeout_secs = DEFAULT_CACHE_TIMEOUT_SECS;
+	cache.link_timeout_secs = DEFAULT_CACHE_TIMEOUT_SECS;
+	cache.max_size = DEFAULT_MAX_CACHE_SIZE;
+	cache.clean_interval_secs = DEFAULT_CACHE_CLEAN_INTERVAL_SECS;
+	cache.min_clean_interval_secs = DEFAULT_MIN_CACHE_CLEAN_INTERVAL_SECS;
 	cache.on = 1;
 
 	return fuse_opt_parse(args, &cache, cache_opts, NULL);

compat/darwin_compat.c

@@ -0,0 +1,246 @@
+/*
+ * Copyright (c) 2006-2008 Amit Singh/Google Inc.
+ * Copyright (c) 2012 Anatol Pomozov
+ * Copyright (c) 2011-2013 Benjamin Fleischer
+ */
+
+#include "darwin_compat.h"
+
+#include <assert.h>
+#include <errno.h>
+#include <sys/types.h>
+
+/*
+ * Semaphore implementation based on:
+ *
+ * Copyright (C) 2000,02 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ * Written by Ga<EB>l Le Mignot <address@hidden>
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * The GNU C Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with the GNU C Library; see the file COPYING.LIB.  If not,
+ * write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/* Semaphores */
+
+#define __SEM_ID_NONE  ((int)0x0)
+#define __SEM_ID_LOCAL ((int)0xcafef00d)
+
+/* http://www.opengroup.org/onlinepubs/007908799/xsh/sem_init.html */
+int
+darwin_sem_init(darwin_sem_t *sem, int pshared, unsigned int value)
+{
+    if (pshared) {
+        errno = ENOSYS;
+        return -1;
+    }
+
+    sem->id = __SEM_ID_NONE;
+
+    if (pthread_cond_init(&sem->__data.local.count_cond, NULL)) {
+        goto cond_init_fail;
+    }
+
+    if (pthread_mutex_init(&sem->__data.local.count_lock, NULL)) {
+        goto mutex_init_fail;
+    }
+
+    sem->__data.local.count = value;
+    sem->id = __SEM_ID_LOCAL;
+
+    return 0;
+
+mutex_init_fail:
+
+    pthread_cond_destroy(&sem->__data.local.count_cond);
+
+cond_init_fail:
+
+    return -1;
+}
+
+/* http://www.opengroup.org/onlinepubs/007908799/xsh/sem_destroy.html */
+int
+darwin_sem_destroy(darwin_sem_t *sem)
+{
+    int res = 0;
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    sem->id = __SEM_ID_NONE;
+    pthread_cond_broadcast(&sem->__data.local.count_cond);
+
+    if (pthread_cond_destroy(&sem->__data.local.count_cond)) {
+        res = -1;
+    }
+
+    pthread_mutex_unlock(&sem->__data.local.count_lock);
+
+    if (pthread_mutex_destroy(&sem->__data.local.count_lock)) {
+        res = -1;
+    }
+
+    return res;
+}
+
+int
+darwin_sem_getvalue(darwin_sem_t *sem, unsigned int *sval)
+{
+    int res = 0;
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    if (sem->id != __SEM_ID_LOCAL) {
+        res = -1;
+        errno = EINVAL;
+    } else {
+        *sval = sem->__data.local.count;
+    }
+
+    pthread_mutex_unlock(&sem->__data.local.count_lock);
+
+    return res;
+}
+
+/* http://www.opengroup.org/onlinepubs/007908799/xsh/sem_post.html */
+int
+darwin_sem_post(darwin_sem_t *sem)
+{
+    int res = 0;
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    if (sem->id != __SEM_ID_LOCAL) {
+        res = -1;
+        errno = EINVAL;
+    } else if (sem->__data.local.count < DARWIN_SEM_VALUE_MAX) {
+        sem->__data.local.count++;
+        if (sem->__data.local.count == 1) {
+            pthread_cond_signal(&sem->__data.local.count_cond);
+        }
+    } else {
+        errno = ERANGE;
+        res = -1;
+    }
+
+    pthread_mutex_unlock(&sem->__data.local.count_lock);
+
+    return res;
+}
+
+/* http://www.opengroup.org/onlinepubs/009695399/functions/sem_timedwait.html */
+int
+darwin_sem_timedwait(darwin_sem_t *sem, const struct timespec *abs_timeout)
+{
+    int res = 0;
+
+    if (abs_timeout &&
+        (abs_timeout->tv_nsec < 0 || abs_timeout->tv_nsec >= 1000000000)) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    pthread_cleanup_push((void(*)(void*))&pthread_mutex_unlock,
+                 &sem->__data.local.count_lock);
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    if (sem->id != __SEM_ID_LOCAL) {
+        errno = EINVAL;
+        res = -1;
+    } else {
+        if (!sem->__data.local.count) {
+            res = pthread_cond_timedwait(&sem->__data.local.count_cond,
+                             &sem->__data.local.count_lock,
+                             abs_timeout);
+        }
+        if (res) {
+            assert(res == ETIMEDOUT);
+            res = -1;
+            errno = ETIMEDOUT;
+        } else if (sem->id != __SEM_ID_LOCAL) {
+            res = -1;
+            errno = EINVAL;
+        } else {
+            sem->__data.local.count--;
+        }
+    }
+
+    pthread_cleanup_pop(1);
+
+    return res;
+}
+
+/* http://www.opengroup.org/onlinepubs/007908799/xsh/sem_trywait.html */
+int
+darwin_sem_trywait(darwin_sem_t *sem)
+{
+    int res = 0;
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    if (sem->id != __SEM_ID_LOCAL) {
+        res = -1;
+        errno = EINVAL;
+    } else if (sem->__data.local.count) {
+        sem->__data.local.count--;
+    } else {
+        res = -1;
+        errno = EAGAIN;
+    }
+
+    pthread_mutex_unlock (&sem->__data.local.count_lock);
+
+    return res;
+}
+
+/* http://www.opengroup.org/onlinepubs/007908799/xsh/sem_wait.html */
+int
+darwin_sem_wait(darwin_sem_t *sem)
+{
+    int res = 0;
+
+    pthread_cleanup_push((void(*)(void*))&pthread_mutex_unlock,
+                 &sem->__data.local.count_lock);
+
+    pthread_mutex_lock(&sem->__data.local.count_lock);
+
+    if (sem->id != __SEM_ID_LOCAL) {
+        errno = EINVAL;
+        res = -1;
+    } else {
+        if (!sem->__data.local.count) {
+            pthread_cond_wait(&sem->__data.local.count_cond,
+                      &sem->__data.local.count_lock);
+            if (!sem->__data.local.count) {
+                /* spurious wakeup, assume it is an interruption */
+                res = -1;
+                errno = EINTR;
+                goto out;
+            }
+        }
+        if (sem->id != __SEM_ID_LOCAL) {
+            res = -1;
+            errno = EINVAL;
+        } else {
+            sem->__data.local.count--;
+        }
+    }
+
+out:
+    pthread_cleanup_pop(1);
+
+    return res;
+}

compat/darwin_compat.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2006-2008 Amit Singh/Google Inc.
+ * Copyright (c) 2011-2013 Benjamin Fleischer
+ */
+
+#ifndef _DARWIN_COMPAT_
+#define _DARWIN_COMPAT_
+
+#include <pthread.h>
+
+/* Semaphores */
+
+typedef struct darwin_sem {
+    int id;
+    union {
+        struct
+        {
+            unsigned int    count;
+            pthread_mutex_t count_lock;
+            pthread_cond_t  count_cond;
+        } local;
+    } __data;
+} darwin_sem_t;
+
+#define DARWIN_SEM_VALUE_MAX ((int32_t)32767)
+
+int darwin_sem_init(darwin_sem_t *sem, int pshared, unsigned int value);
+int darwin_sem_destroy(darwin_sem_t *sem);
+int darwin_sem_getvalue(darwin_sem_t *sem, unsigned int *value);
+int darwin_sem_post(darwin_sem_t *sem);
+int darwin_sem_timedwait(darwin_sem_t *sem, const struct timespec *abs_timeout);
+int darwin_sem_trywait(darwin_sem_t *sem);
+int darwin_sem_wait(darwin_sem_t *sem);
+
+/* Caller must not include <semaphore.h> */
+
+typedef darwin_sem_t sem_t;
+
+#define sem_init(s, p, v)   darwin_sem_init(s, p, v)
+#define sem_destroy(s)      darwin_sem_destroy(s)
+#define sem_getvalue(s, v)  darwin_sem_getvalue(s, v)
+#define sem_post(s)         darwin_sem_post(s)
+#define sem_timedwait(s, t) darwin_sem_timedwait(s, t)
+#define sem_trywait(s)      darwin_sem_trywait(s)
+#define sem_wait(s)         darwin_sem_wait(s)
+
+#define SEM_VALUE_MAX       DARWIN_SEM_VALUE_MAX
+
+#endif /* _DARWIN_COMPAT_ */

configure.ac

@@ -1,5 +1,6 @@
-AC_INIT(sshfs-fuse, 2.5)
-AM_INIT_AUTOMAKE
+AC_INIT(sshfs, 2.7)
+AC_CANONICAL_TARGET
+AM_INIT_AUTOMAKE([foreign subdir-objects])
 AM_CONFIG_HEADER(config.h)
 
 AC_PROG_CC
@@ -11,6 +12,12 @@ sshnodelay_libs=$LIBS
 AC_SUBST(sshnodelay_libs)
 LIBS=
 
+case "$target_os" in
+    *linux*) osname=linux;;
+    *darwin*) osname=darwin;;
+    *) osname=unknown;;
+esac
+
 AC_ARG_ENABLE(sshnodelay,
 	[  --disable-sshnodelay    Don't compile NODELAY workaround for ssh])
 
@@ -43,10 +50,22 @@ oldlibs="$LIBS"
 LIBS="$LIBS $SSHFS_LIBS"
 AC_CHECK_FUNC([fuse_opt_parse], [have_fuse_opt_parse=yes])
 LIBS="$oldlibs"
-if test "$have_fuse_opt_parse" = no; then
-	CFLAGS="$CFLAGS -Icompat"
+if test "$have_fuse_opt_parse" = no -o "$osname" = darwin; then
+	CFLAGS="$CFLAGS -I${srcdir}/compat"
 fi
 AM_CONDITIONAL(FUSE_OPT_COMPAT, test "$have_fuse_opt_parse" = no)
+AM_CONDITIONAL(DARWIN_COMPAT, test "$osname" = darwin)
+
+AC_CHECK_PROG(UNMOUNT_COMMAND, fusermount, fusermount -u, umount)
+
+# TODO: Figure out why we special-case this in Darwin.  Would be nice if
+# the default setting was consistent across platforms so we wouldn't need
+# to care about it here.
+case "$osname" in
+    darwin) IDMAP_DEFAULT=user ;;
+    *) IDMAP_DEFAULT=none ;;
+esac
+AC_SUBST(IDMAP_DEFAULT)
 
 AC_CONFIG_FILES([Makefile])
 AC_OUTPUT

generate-faq.sh

@@ -1,11 +0,0 @@
-#! /bin/bash
-
-(
-echo "See http://fuse.sourceforge.net/wiki/index.php/SshfsFaq for the latest"
-echo "version of this FAQ"
-echo "---"
-echo
-
-lynx -nolist -dump http://fuse.sourceforge.net/wiki/index.php/SshfsFaq \
-| sed -e '1,12d' -e '/____/,$d'
-) > FAQ.txt

sshfs.1.in

@@ -7,7 +7,7 @@ SSHFS \- filesystem client based on ssh
 \fBsshfs\fP [\fIuser\fP@]\fBhost\fP:[\fIdir\fP] \fBmountpoint\fP [\fIoptions\fP]
 .SS unmounting
 .TP
-\fBfusermount -u mountpoint\fP
+\fB__UNMOUNT_COMMAND__ 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)
@@ -97,14 +97,14 @@ fix buffer fillup bug in server (default: on)
 .RE
 .TP
 \fB\-o\fR idmap=TYPE
-user/group ID mapping, possible types are:
+user/group ID mapping (default: __IDMAP_DEFAULT__)
 .RS 8
 .TP
 none
-no translation of the ID space (default)
+no translation of the ID space
 .TP
 user
-only translate UID of connecting user
+only translate UID/GID of connecting user
 .TP
 file
 translate UIDs/GIDs based upon the contents of \fBuidfile \fR and
@@ -141,6 +141,8 @@ 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 slave
 communicate over stdin and stdout bypassing network
@@ -282,5 +284,3 @@ 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).
-
-

sshfs.c

@@ -12,6 +12,9 @@
 #include <fuse.h>
 #include <fuse_opt.h>
 #include <fuse_lowlevel.h>
+#ifdef __APPLE__
+#  include <fuse_darwin.h>
+#endif
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -20,7 +23,9 @@
 #include <string.h>
 #include <stdint.h>
 #include <errno.h>
-#include <semaphore.h>
+#ifndef __APPLE__
+#  include <semaphore.h>
+#endif
 #include <pthread.h>
 #include <netdb.h>
 #include <signal.h>
@@ -38,6 +43,11 @@
 #include <pwd.h>
 #include <grp.h>
 #include <limits.h>
+#ifdef __APPLE__
+#  include <strings.h>
+#  include <libgen.h>
+#  include <darwin_compat.h>
+#endif
 
 #include "cache.h"
 
@@ -125,6 +135,12 @@
 #define READDIR_START 2
 #define READDIR_MAX 32
 
+#define MAX_PASSWORD 1024
+
+#ifdef __APPLE__
+static char sshfs_program_path[PATH_MAX] = { 0 };
+#endif /* __APPLE__ */
+
 struct buffer {
 	uint8_t *p;
 	size_t len;
@@ -241,6 +257,10 @@ struct sshfs {
 	int server_version;
 	unsigned remote_uid;
 	unsigned local_uid;
+#ifdef __APPLE__
+	unsigned remote_gid;
+	unsigned local_gid;
+#endif
 	int remote_uid_detected;
 	unsigned blksize;
 	char *progname;
@@ -254,6 +274,7 @@ struct sshfs {
 	int ext_statvfs;
 	int ext_hardlink;
 	mode_t mnt_mode;
+	struct fuse_operations *op;
 
 	/* statistics */
 	uint64_t bytes_sent;
@@ -736,8 +757,17 @@ static int buf_get_attrs(struct buffer *buf, struct stat *stbuf, int *flagsp)
 		}
 	}
 
+#ifdef __APPLE__
+	if (sshfs.remote_uid_detected) {
+		if (uid == sshfs.remote_uid)
+			uid = sshfs.local_uid;
+		if (gid == sshfs.remote_gid)
+			gid = sshfs.local_gid;
+	}
+#else /* !__APPLE__ */
 	if (sshfs.remote_uid_detected && uid == sshfs.remote_uid)
 		uid = sshfs.local_uid;
+#endif /* __APPLE__ */
 	if (sshfs.idmap == IDMAP_FILE && sshfs.uid_map)
 		if (translate_id(&uid, sshfs.uid_map) == -1)
 			return -EPERM;
@@ -846,11 +876,35 @@ static void ssh_add_arg(const char *arg)
 #ifdef SSH_NODELAY_WORKAROUND
 static int do_ssh_nodelay_workaround(void)
 {
+#ifdef __APPLE__
+	char *oldpreload = getenv("DYLD_INSERT_LIBRARIES");
+#else
 	char *oldpreload = getenv("LD_PRELOAD");
+#endif
 	char *newpreload;
 	char sopath[PATH_MAX];
 	int res;
 
+#ifdef __APPLE__
+	char *sshfs_program_path_base = NULL;
+	if (!sshfs_program_path[0]) {
+		goto nobundle;
+	}
+	sshfs_program_path_base = dirname(sshfs_program_path);
+	if (!sshfs_program_path_base) {
+		goto nobundle;
+	}
+	snprintf(sopath, sizeof(sopath), "%s/%s", sshfs_program_path_base,
+             SSHNODELAY_SO);
+	res = access(sopath, R_OK);
+	if (res == -1) {
+		goto nobundle;
+	}
+	goto pathok;
+
+nobundle:
+#endif /* __APPLE__ */
+
 	snprintf(sopath, sizeof(sopath), "%s/%s", LIBDIR, SSHNODELAY_SO);
 	res = access(sopath, R_OK);
 	if (res == -1) {
@@ -876,15 +930,24 @@ static int do_ssh_nodelay_workaround(void)
 		}
 	}
 
+#ifdef __APPLE__
+pathok:
+#endif
+
 	newpreload = g_strdup_printf("%s%s%s",
 				     oldpreload ? oldpreload : "",
 				     oldpreload ? " " : "",
 				     sopath);
 
+#ifdef __APPLE__
+	if (!newpreload || setenv("DYLD_INSERT_LIBRARIES", newpreload, 1) == -1)
+		fprintf(stderr, "warning: failed set DYLD_INSERT_LIBRARIES for ssh nodelay workaround\n");
+#else /* !__APPLE__ */
 	if (!newpreload || setenv("LD_PRELOAD", newpreload, 1) == -1) {
 		fprintf(stderr, "warning: failed set LD_PRELOAD "
 			"for ssh nodelay workaround\n");
 	}
+#endif /* __APPLE__ */
 	g_free(newpreload);
 	return 0;
 }
@@ -1604,6 +1667,10 @@ static void sftp_detect_uid()
 
 	sshfs.remote_uid = stbuf.st_uid;
 	sshfs.local_uid = getuid();
+#ifdef __APPLE__
+	sshfs.remote_gid = stbuf.st_gid;
+	sshfs.local_gid = getgid();
+#endif
 	sshfs.remote_uid_detected = 1;
 	DEBUG("remote_uid = %i\n", sshfs.remote_uid);
 
@@ -1932,6 +1999,22 @@ static int sshfs_getattr(const char *path, struct stat *stbuf)
 	return err;
 }
 
+static int sshfs_access(const char *path, int mask)
+{
+	struct stat stbuf;
+	int err = 0;
+
+	if (mask & X_OK) {
+		err = sshfs.op->getattr(path, &stbuf);
+		if (!err) {
+			if (S_ISREG(stbuf.st_mode) &&
+			    !(stbuf.st_mode & (S_IXUSR|S_IXGRP|S_IXOTH)))
+				err = -EACCES;
+		}
+	}
+	return err;
+}
+
 static int count_components(const char *p)
 {
 	int ctr;
@@ -2345,8 +2428,17 @@ static int sshfs_chown(const char *path, uid_t uid, gid_t gid)
 	int err;
 	struct buffer buf;
 
+#ifdef __APPLE__
+	if (sshfs.remote_uid_detected) {
+		if (uid == sshfs.local_uid)
+			uid = sshfs.remote_uid;
+		if (gid == sshfs.local_gid)
+			gid = sshfs.remote_gid;
+	}
+#else /* !__APPLE__ */
 	if (sshfs.remote_uid_detected && uid == sshfs.local_uid)
 		uid = sshfs.remote_uid;
+#endif /* __APPLE__ */
 	if (sshfs.idmap == IDMAP_FILE && sshfs.r_uid_map)
 		if(translate_id(&uid, sshfs.r_uid_map) == -1)
 			return -EPERM;
@@ -3234,6 +3326,7 @@ static struct fuse_cache_operations sshfs_oper = {
 	.oper = {
 		.init       = sshfs_init,
 		.getattr    = sshfs_getattr,
+		.access     = sshfs_access,
 		.readlink   = sshfs_readlink,
 		.mknod      = sshfs_mknod,
 		.mkdir      = sshfs_mkdir,
@@ -3284,8 +3377,15 @@ static void usage(const char *progname)
 "    -o sync_readdir        synchronous readdir\n"
 "    -o sshfs_debug         print some debugging information\n"
 "    -o cache=BOOL          enable caching {yes,no} (default: yes)\n"
+"    -o cache_max_size=N    sets the maximum size of the cache (default: 10000)\n"
 "    -o cache_timeout=N     sets timeout for caches in seconds (default: 20)\n"
 "    -o cache_X_timeout=N   sets timeout for {stat,dir,link} cache\n"
+"    -o cache_clean_interval=N\n"
+"                           sets the interval for automatic cleaning of the\n"
+"                           cache (default: 60)\n"
+"    -o cache_min_clean_interval=N\n"
+"                           sets the interval for forced cleaning of the\n"
+"                           cache if full (default: 5)\n"
 "    -o workaround=LIST     colon separated list of workarounds\n"
 "             none             no workarounds enabled\n"
 "             all              all workarounds enabled\n"
@@ -3296,9 +3396,9 @@ static void usage(const char *progname)
 "             [no]nodelaysrv   set nodelay tcp flag in sshd (default: off)\n"
 "             [no]truncate     fix truncate for old servers (default: off)\n"
 "             [no]buflimit     fix buffer fillup bug in server (default: on)\n"
-"    -o idmap=TYPE          user/group ID mapping, possible types are:\n"
-"             none             no translation of the ID space (default)\n"
-"             user             only translate UID of connecting user\n"
+"    -o idmap=TYPE          user/group ID mapping (default: " IDMAP_DEFAULT ")\n"
+"             none             no translation of the ID space\n"
+"             user             only translate UID/GID of connecting user\n"
 "             file             translate UIDs/GIDs contained in uidfile/gidfile\n"
 "    -o uidfile=FILE        file containing username:remote_uid mappings\n"
 "    -o gidfile=FILE        file containing groupname:remote_gid mappings\n"
@@ -3336,10 +3436,11 @@ static int is_ssh_opt(const char *arg)
 
 static int sshfs_fuse_main(struct fuse_args *args)
 {
+	sshfs.op = cache_init(&sshfs_oper);
 #if FUSE_VERSION >= 26
-	return fuse_main(args->argc, args->argv, cache_init(&sshfs_oper), NULL);
+	return fuse_main(args->argc, args->argv, sshfs.op, NULL);
 #else
-	return fuse_main(args->argc, args->argv, cache_init(&sshfs_oper));
+	return fuse_main(args->argc, args->argv, sshfs.op);
 #endif
 }
 
@@ -3463,7 +3564,7 @@ static void check_large_read(struct fuse_args *args)
 static int read_password(void)
 {
 	int size = getpagesize();
-	int max_password = 64;
+	int max_password = MIN(MAX_PASSWORD, size - 1);
 	int n;
 
 	sshfs.password = mmap(NULL, size, PROT_READ | PROT_WRITE,
@@ -3473,6 +3574,13 @@ static int read_password(void)
 		perror("Failed to allocate locked page for password");
 		return -1;
 	}
+	if (mlock(sshfs.password, size) != 0) {
+		memset(sshfs.password, 0, size);
+		munmap(sshfs.password, size);
+		sshfs.password = NULL;
+		perror("Failed to allocate locked page for password");
+		return -1;
+	}
 
 	/* Don't use fgets() because password might stay in memory */
 	for (n = 0; n < max_password; n++) {
@@ -3798,7 +3906,11 @@ static inline void load_gid_map(void)
 	read_id_map(sshfs.gid_file, &groupname_to_gid, "gid", &sshfs.gid_map, &sshfs.r_gid_map);
 }
 
+#ifdef __APPLE__
+int main(int argc, char *argv[], __unused char *envp[], char **exec_path)
+#else
 int main(int argc, char *argv[])
+#endif
 {
 	int res;
 	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
@@ -3807,6 +3919,14 @@ int main(int argc, char *argv[])
 	const char *sftp_server;
 	int libver;
 
+#ifdef __APPLE__
+	if (!realpath(*exec_path, sshfs_program_path)) {
+		memset(sshfs_program_path, 0, PATH_MAX);
+	}
+
+	/* Until this gets fixed somewhere else. */
+	g_slice_set_config(G_SLICE_CONFIG_ALWAYS_MALLOC, TRUE);
+#endif /* __APPLE__ */
 	g_thread_init(NULL);
 
 	sshfs.blksize = 4096;
@@ -3815,7 +3935,11 @@ int main(int argc, char *argv[])
 	sshfs.max_write = 32768;
 	sshfs.nodelay_workaround = 1;
 	sshfs.nodelaysrv_workaround = 0;
+#ifdef __APPLE__
+	sshfs.rename_workaround = 1;
+#else
 	sshfs.rename_workaround = 0;
+#endif
 	sshfs.truncate_workaround = 0;
 	sshfs.buflimit_workaround = 1;
 	sshfs.ssh_ver = 2;
@@ -3827,7 +3951,15 @@ int main(int argc, char *argv[])
 	sshfs.delay_connect = 0;
 	sshfs.slave = 0;
 	sshfs.detect_uid = 0;
-	sshfs.idmap = IDMAP_NONE;
+	if (strcmp(IDMAP_DEFAULT, "none") == 0) {
+		sshfs.idmap = IDMAP_NONE;
+	} else if (strcmp(IDMAP_DEFAULT, "user") == 0) {
+		sshfs.idmap = IDMAP_USER;
+	} else {
+		fprintf(stderr, "bad idmap default value built into sshfs; "
+		    "assuming none (bad logic in configure script?)\n");
+		sshfs.idmap = IDMAP_NONE;
+	}
 	sshfs.nomap = NOMAP_ERROR;
 	ssh_add_arg("ssh");
 	ssh_add_arg("-x");
@@ -3977,7 +4109,8 @@ int main(int argc, char *argv[])
 		if (res == -1)
 			perror("WARNING: failed to set FD_CLOEXEC on fuse device");
 
-		fuse = fuse_new(ch, &args, cache_init(&sshfs_oper),
+		sshfs.op = cache_init(&sshfs_oper);
+		fuse = fuse_new(ch, &args, sshfs.op,
 				sizeof(struct fuse_operations), NULL);
 		if (fuse == NULL) {
 			fuse_unmount(mountpoint, ch);

sshnodelay.c

@@ -5,14 +5,55 @@
 #include <netinet/in.h>
 #include <netinet/tcp.h>
 
-int connect(int sock, const struct sockaddr *addr, socklen_t addrlen)
+/* Wrapper around connect(2) to explicitly set TCP_NODELAY. */
+static int nodelay_connect(
+    int (*real_connect)(int, const struct sockaddr *, socklen_t),
+    int sock, const struct sockaddr *addr, socklen_t addrlen)
 {
-	int (*next_connect)(int, const struct sockaddr *, socklen_t) =
-		dlsym(RTLD_NEXT, "connect");
-	int res = next_connect(sock, addr, addrlen);
+	int res = real_connect(sock, addr, addrlen);
 	if (!res && addr->sa_family == AF_INET) {
 		int opt = 1;
 		setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof(opt));
 	}
 	return res;
 }
+
+#if __APPLE__
+
+/* OS X does not have LD_PRELOAD but has DYLD_INSERT_LIBRARIES.  The right
+ * environment variable is set by sshfs.c when attempting to load the
+ * sshnodelay workaround.
+ *
+ * However, things are not that simple: DYLD_INSERT_LIBRARIES does not
+ * behave exactly like LD_PRELOAD.  Instead, the dyld dynamic linker will
+ * look for __DATA __interpose sections on the libraries given via the
+ * DYLD_INSERT_LIBRARIES variable.  The contents of this section are pairs
+ * of replacement functions and functions to be replaced, respectively.
+ * Prepare such section here. */
+
+int custom_connect(int sock, const struct sockaddr *addr, socklen_t addrlen);
+
+typedef struct interpose_s {
+	void *new_func;
+	void *orig_func;
+} interpose_t;
+
+static const interpose_t interposers[] \
+	__attribute__ ((section("__DATA, __interpose"))) = {
+	{ (void *)custom_connect,  (void *)connect  },
+};
+
+int custom_connect(int sock, const struct sockaddr *addr, socklen_t addrlen)
+{
+	return nodelay_connect(connect, sock, addr, addrlen);
+}
+
+#else /* !__APPLE__ */
+
+int connect(int sock, const struct sockaddr *addr, socklen_t addrlen)
+{
+	return nodelay_connect(dlsym(RTLD_NEXT, "connect"),
+	                       sock, addr, addrlen);
+}
+
+#endif /* !__APPLE__ */