[Midnightbsd-cvs] src [11110] trunk/sbin/mount_fusefs: add fuse mount
laffer1 at midnightbsd.org
laffer1 at midnightbsd.org
Tue Jun 19 14:43:02 EDT 2018
Revision: 11110
http://svnweb.midnightbsd.org/src/?rev=11110
Author: laffer1
Date: 2018-06-19 14:42:20 -0400 (Tue, 19 Jun 2018)
Log Message:
-----------
add fuse mount
Added Paths:
-----------
trunk/sbin/mount_fusefs/
trunk/sbin/mount_fusefs/Makefile
trunk/sbin/mount_fusefs/mount_fusefs.8
trunk/sbin/mount_fusefs/mount_fusefs.c
Added: trunk/sbin/mount_fusefs/Makefile
===================================================================
--- trunk/sbin/mount_fusefs/Makefile (rev 0)
+++ trunk/sbin/mount_fusefs/Makefile 2018-06-19 18:42:20 UTC (rev 11110)
@@ -0,0 +1,34 @@
+# $MidnightBSD$
+# $FreeBSD: stable/10/sbin/mount_fusefs/Makefile 241519 2012-10-13 23:54:26Z attilio $
+
+.if defined(DEBUG)
+DEBUG_FLAGS+= -D_DEBUG -g
+.endif
+
+.if defined(DEBUG2G)
+DEBUG_FLAGS+= -D_DEBUG2G -g
+.endif
+
+.if defined(DEBUG3G)
+DEBUG_FLAGS+= -D_DEBUG3G -g
+.endif
+
+.if defined(DEBUG_MSG)
+DEBUG_FLAGS+= -D_DEBUG_MSG
+.endif
+
+.if defined(F4BVERS)
+DEBUG_FLAGS+= -DFUSE4BSD_VERSION="\"${F4BVERS}\""
+.endif
+
+PROG= mount_fusefs
+SRCS= mount_fusefs.c getmntopts.c
+MAN8= mount_fusefs.8
+NO_MANCOMPRESS?= yes
+
+MOUNT= ${.CURDIR}/../mount
+CFLAGS+= -I${MOUNT}
+
+.PATH: ${MOUNT}
+
+.include <bsd.prog.mk>
Property changes on: trunk/sbin/mount_fusefs/Makefile
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Added: svn:eol-style
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Added: trunk/sbin/mount_fusefs/mount_fusefs.8
===================================================================
--- trunk/sbin/mount_fusefs/mount_fusefs.8 (rev 0)
+++ trunk/sbin/mount_fusefs/mount_fusefs.8 2018-06-19 18:42:20 UTC (rev 11110)
@@ -0,0 +1,380 @@
+.\" $MidnightBSD$
+.\" Copyright (c) 1980, 1989, 1991, 1993
+.\" The Regents of the University of California.
+.\" Copyright (c) 2005, 2006 Csaba Henk
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\" may be used to endorse or promote products derived from this software
+.\" without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\" $FreeBSD: stable/10/sbin/mount_fusefs/mount_fusefs.8 306996 2016-10-10 16:38:07Z sevan $
+.\"
+.Dd October 3, 2016
+.Dt MOUNT_FUSEFS 8
+.Os
+.Sh NAME
+.Nm mount_fusefs
+.Nd mount a Fuse file system daemon
+.Sh SYNOPSIS
+.Nm
+.Op Fl A
+.Op Fl S
+.Op Fl v
+.Op Fl D Ar fuse_daemon
+.Op Fl O Ar daemon_opts
+.Op Fl s Ar special
+.Op Fl m Ar node
+.Op Fl h
+.Op Fl V
+.Op Fl o Ar option ...
+.Ar special node
+.Op Ar fuse_daemon ...
+.Sh DESCRIPTION
+Basic usage is to start a fuse daemon on the given
+.Ar special
+file.
+In practice, the daemon is assigned a
+.Ar special
+file automatically, which can then be indentified via
+.Xr fstat 1 .
+That special file can then be mounted by
+.Nm .
+.Pp
+However, the procedure of spawning a daemon will usually be automated
+so that it is performed by
+.Nm .
+If the command invoking a given
+.Ar fuse_daemon
+is appended to the list of arguments,
+.Nm
+will call the
+.Ar fuse_daemon
+via that command.
+In that way the
+.Ar fuse_daemon
+will be instructed to attach itself to
+.Ar special .
+From that on mounting goes as in the simple case. (See
+.Sx DAEMON MOUNTS . )
+.Pp
+The
+.Ar special
+argument will normally be treated as the path of the special file to mount.
+.Pp
+However, if
+.Pa auto
+is passed as
+.Ar special ,
+then
+.Nm
+will look for a suitable free fuse device by itself.
+.Pp
+Finally, if
+.Ar special
+is an integer it will be interpreted as the number
+of the file descriptor of an already open fuse device
+(used when the Fuse library invokes
+.Nm .
+(See
+.Sx DAEMON MOUNTS ) .
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl A , Ic --reject-allow_other
+Prohibit the
+.Cm allow_other
+mount flag.
+Intended for use in scripts and the
+.Xr sudoers 5
+file.
+.It Fl S , Ic --safe
+Run in safe mode (i.e. reject invoking a filesystem daemon)
+.It Fl v
+Be verbose
+.It Fl D, Ic --daemon Ar daemon
+Call the specified
+.Ar daemon
+.It Fl O, Ic --daemon_opts Ar opts
+Add
+.Ar opts
+to the daemon's command line
+.It Fl s, Ic --special Ar special
+Use
+.Ar special
+as special
+.It Fl m, Ic --mountpath Ar node
+Mount on
+.Ar node
+.It Fl h, Ic --help
+Show help
+.It Fl V, Ic --version
+Show version information
+.It Fl o
+Mount options are specified via
+.Fl o .
+The following options are available (and also their negated versions,
+by prefixing them with
+.Dq no ) :
+.Bl -tag -width indent
+.It Cm default_permissions
+Enable traditional (file mode based) permission checking in kernel
+.It Cm allow_other
+Do not apply
+.Sx STRICT ACCESS POLICY .
+Only root can use this option
+.It Cm max_read Ns = Ns Ar n
+Limit size of read requests to
+.Ar n
+.It Cm private
+Refuse shared mounting of the daemon.
+This is the default behaviour, to allow sharing, expicitly use
+.Fl o Cm noprivate
+.It Cm neglect_shares
+Do not refuse unmounting if there are secondary mounts
+.It Cm push_symlinks_in
+Prefix absolute symlinks with the mountpoint
+.El
+.Pp
+.El
+.Pp
+Besides the above mount options, there is a set of pseudo-mount options which
+are supported by the Fuse library.
+One can list these by passing
+.Fl h
+to a Fuse daemon.
+Most of these options only have affect on the behavior of the daemon (that is,
+their scope is limited to userspace).
+However, there are some which do require in-kernel support.
+Currently the options supported by the kernel are:
+.Bl -tag -width indent
+.It Cm direct_io
+Bypass the buffer cache system
+.It Cm kernel_cache
+By default cached buffers of a given file are flushed at each
+.Xr open 2 .
+This option disables this behaviour
+.El
+.Sh DAEMON MOUNTS
+Usually users do not need to use
+.Nm
+directly, as the Fuse library enables Fuse daemons to invoke
+.Nm .
+That is,
+.Pp
+.Dl fuse_daemon device mountpoint
+.Pp
+has the same effect as
+.Pp
+.Dl mount_fusefs auto mountpoint fuse_daemon
+.Pp
+This is the recommended usage when you want basic usage
+(eg, run the daemon at a low privilege level but mount it as root).
+.Sh STRICT ACCESS POLICY
+The strict access policy for Fuse filesystems lets one to use the filesystem
+only if the filesystem daemon has the same credentials (uid, real uid, gid,
+real gid) as the user.
+.Pp
+This is applied for Fuse mounts by default and only root can mount without
+the strict access policy (i.e. the
+.Cm allow_other
+mount option).
+.Pp
+This is to shield users from the daemon
+.Dq spying
+on their I/O activities.
+.Pp
+Users might opt to willingly relax strict access policy (as far they
+are concerned) by doing their own secondary mount (See
+.Sx SHARED MOUNTS ) .
+.Sh SHARED MOUNTS
+A Fuse daemon can be shared (i.e. mounted multiple times).
+When doing the first (primary) mount, the spawner and the mounter of the daemon
+must have the same uid, or the mounter should be the superuser.
+.Pp
+After the primary mount is in place, secondary mounts can be done by anyone
+unless this feature is disabled by
+.Cm private .
+The behaviour of a secondary mount is analogous to that of symbolic
+links: they redirect all filesystem operations to the primary mount.
+.Pp
+Doing a secondary mount is like signing an agreement: by this action, the mounter
+agrees that the Fuse daemon can trace her I/O activities.
+From then on she is not banned from using the filesystem
+(either via her own mount or via the primary mount), regardless whether
+.Cm allow_other
+is used or not.
+.Pp
+The device name of a secondary mount is the device name of the corresponding
+primary mount, followed by a '#' character and the index of the secondary
+mount; e.g.
+.Pa /dev/fuse0#3 .
+.Sh SECURITY
+System administrators might want to use a custom mount policy (ie., one going
+beyond the
+.Va vfs.usermount
+sysctl).
+The primary tool for such purposes is
+.Xr sudo 8 .
+However, given that
+.Nm
+is capable of invoking an arbitrary program, one must be careful when doing this.
+.Nm
+is designed in a way such that it makes that easy.
+For this purpose, there are options which disable certain risky features (i.e.
+.Fl S
+and
+.Fl A ) ,
+and command line parsing is done in a flexible way: mixing options and
+non-options is allowed, but processing them stops at the third non-option
+argument (after the first two has been utilized as device and mountpoint).
+The rest of the command line specifies the daemon and its arguments.
+(Alternatively, the daemon, the special and the mount path can be
+specified using the respective options.) Note that
+.Nm
+ignores the environment variable
+.Ev POSIXLY_CORRECT
+and always behaves as described.
+.Pp
+In general, to be as scripting /
+.Xr sudoers 5
+friendly as possible, no information has a fixed
+position in the command line, but once a given piece of information is
+provided, subsequent arguments/options cannot override it (with the
+exception of some non-critical ones).
+.Sh ENVIRONMENT
+.Bl -tag -width ".Ev MOUNT_FUSEFS_SAFE"
+.It Ev MOUNT_FUSEFS_SAFE
+This has the same effect as the
+.Fl S
+option.
+.It Ev MOUNT_FUSEFS_VERBOSE
+This has the same effect as the
+.Fl v
+option.
+.It Ev MOUNT_FUSEFS_IGNORE_UNKNOWN
+If set,
+.Nm
+will ignore uknown mount options.
+.It Ev MOUNT_FUSEFS_CALL_BY_LIB
+Adjust behavior to the needs of the FUSE library.
+Currently it effects help output.
+.El
+.Pp
+Although the following variables do not have any effect on
+.Nm
+itself, they affect the behaviour of fuse daemons:
+.Bl -tag -width ".Ev FUSE_DEV_NAME"
+.It Ev FUSE_DEV_NAME
+Device to attach.
+If not set, the multiplexer path
+.Ar /dev/fuse
+is used.
+.It Ev FUSE_DEV_FD
+File desciptor of an opened Fuse device to use.
+Overrides
+.Ev FUSE_DEV_NAME .
+.It Ev FUSE_NO_MOUNT
+If set, the library will not attempt to mount the filesystem, even
+if a mountpoint argument is supplied.
+.El
+.Sh FILES
+.Bl -tag -width /dev/fuse
+.It Pa /dev/fuse
+Fuse device with which the kernel and Fuse daemons can communicate.
+.It Pa /dev/fuse
+The multiplexer path.
+An
+.Xr open 2
+performed on it automatically is passed to a free Fuse device by the kernel
+(which might be created just for this puprose).
+.El
+.Sh EXAMPLES
+Mount the example filesystem in the Fuse distribution (from its directory):
+either
+.Pp
+.Dl ./fusexmp /mnt/fuse
+.Pp
+or
+.Pp
+.Dl mount_fusefs auto /mnt/fuse ./fusexmp
+.Pp
+Doing the same in two steps, using
+.Pa /dev/fuse0 :
+.Pp
+.Dl FUSE_DEV_NAME=/dev/fuse ./fusexmp &&
+.Dl mount_fusefs /dev/fuse /mnt/fuse
+.Pp
+A script wrapper for fusexmp which ensures that
+.Nm
+does not call any external utility and also provides a hacky
+(non race-free) automatic device selection:
+.Pp
+.Dl #!/bin/sh -e
+.Pp
+.Dl FUSE_DEV_NAME=/dev/fuse fusexmp
+.Dl mount_fusefs -S /dev/fuse /mnt/fuse \(lq$@\(rq
+.Sh SEE ALSO
+.Xr fstat 1 ,
+.Xr mount 8 ,
+.Xr umount 8 ,
+.Xr sudo 8
+.Sh HISTORY
+.Nm
+appeared in
+.Fx 10.0
+as the part of the
+.Fx
+implementation of the Fuse userspace filesystem
+framework (see http://fuse.sourceforge.net).
+.Sh CAVEATS
+This user interface is
+.Fx
+specific.
+Secondary mounts should be unmounted via their device name.
+If an attempt is made to unmount them via their filesystem root path,
+the unmount request will be forwarded to the primary mount path.
+In general, unmounting by device name is less error-prone than by mount path
+(although the latter will also work under normal circumstances).
+.Pp
+If the daemon is specified via the
+.Fl D
+and
+.Fl O
+options, it will be invoked via
+.Xr system 3 ,
+and the daemon's command line will also have an
+.Dq &
+control operator appended, so that we do not have to wait for its termination.
+You should use a simple command line when invoking the daemon via these options.
+.Sh BUGS
+.Ar special
+is treated as a multiplexer if and only if it is literally the same as
+.Pa auto
+or
+.Pa /dev/fuse .
+Other paths which are equivalent with
+.Pa /dev/fuse
+(eg.,
+.Pa /../dev/fuse )
+are not.
Property changes on: trunk/sbin/mount_fusefs/mount_fusefs.8
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Added: svn:eol-style
## -0,0 +1 ##
+native
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\ No newline at end of property
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+text/plain
\ No newline at end of property
Added: trunk/sbin/mount_fusefs/mount_fusefs.c
===================================================================
--- trunk/sbin/mount_fusefs/mount_fusefs.c (rev 0)
+++ trunk/sbin/mount_fusefs/mount_fusefs.c 2018-06-19 18:42:20 UTC (rev 11110)
@@ -0,0 +1,507 @@
+/* $MidnightBSD$ */
+/*-
+ * Copyright (c) 2005 Jean-Sebastien Pedron
+ * Copyright (c) 2005 Csaba Henk
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD: stable/10/sbin/mount_fusefs/mount_fusefs.c 282959 2015-05-15 11:00:12Z trasz $");
+
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/uio.h>
+#include <sys/stat.h>
+#include <sys/sysctl.h>
+
+#include <err.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <getopt.h>
+#include <limits.h>
+#include <osreldate.h>
+#include <paths.h>
+
+#include "mntopts.h"
+
+#ifndef FUSE4BSD_VERSION
+#define FUSE4BSD_VERSION "0.3.9-pre1"
+#endif
+
+void __usage_short(void);
+void usage(void);
+void helpmsg(void);
+void showversion(void);
+int init_backgrounded(void);
+
+static struct mntopt mopts[] = {
+ #define ALTF_PRIVATE 0x01
+ { "private", 0, ALTF_PRIVATE, 1 },
+ { "neglect_shares", 0, 0x02, 1 },
+ { "push_symlinks_in", 0, 0x04, 1 },
+ { "allow_other", 0, 0x08, 1 },
+ { "default_permissions", 0, 0x10, 1 },
+ #define ALTF_MAXREAD 0x20
+ { "max_read=", 0, ALTF_MAXREAD, 1 },
+ #define ALTF_SUBTYPE 0x40
+ { "subtype=", 0, ALTF_SUBTYPE, 1 },
+ #define ALTF_SYNC_UNMOUNT 0x80
+ { "sync_unmount", 0, ALTF_SYNC_UNMOUNT, 1 },
+ /*
+ * MOPT_AUTOMOUNTED, included by MOPT_STDOPTS, does not fit into
+ * the 'flags' argument to nmount(2). We have to abuse altflags
+ * to pass it, as string, via iovec.
+ */
+ #define ALTF_AUTOMOUNTED 0x100
+ { "automounted", 0, ALTF_AUTOMOUNTED, 1 },
+ /* Linux specific options, we silently ignore them */
+ { "fsname=", 0, 0x00, 1 },
+ { "fd=", 0, 0x00, 1 },
+ { "rootmode=", 0, 0x00, 1 },
+ { "user_id=", 0, 0x00, 1 },
+ { "group_id=", 0, 0x00, 1 },
+ { "large_read", 0, 0x00, 1 },
+ /* "nonempty", just the first two chars are stripped off during parsing */
+ { "nempty", 0, 0x00, 1 },
+ MOPT_STDOPTS,
+ MOPT_END
+};
+
+struct mntval {
+ int mv_flag;
+ void *mv_value;
+ int mv_len;
+};
+
+static struct mntval mvals[] = {
+ { ALTF_MAXREAD, NULL, 0 },
+ { ALTF_SUBTYPE, NULL, 0 },
+ { 0, NULL, 0 }
+};
+
+#define DEFAULT_MOUNT_FLAGS ALTF_PRIVATE | ALTF_SYNC_UNMOUNT
+
+int
+main(int argc, char *argv[])
+{
+ struct iovec *iov;
+ int mntflags, iovlen, verbose = 0;
+ char *dev = NULL, *dir = NULL, mntpath[MAXPATHLEN];
+ char *devo = NULL, *diro = NULL;
+ char ndev[128], fdstr[15];
+ int i, done = 0, reject_allow_other = 0, safe_level = 0;
+ int altflags = DEFAULT_MOUNT_FLAGS;
+ int __altflags = DEFAULT_MOUNT_FLAGS;
+ int ch = 0;
+ struct mntopt *mo;
+ struct mntval *mv;
+ static struct option longopts[] = {
+ {"reject-allow_other", no_argument, NULL, 'A'},
+ {"safe", no_argument, NULL, 'S'},
+ {"daemon", required_argument, NULL, 'D'},
+ {"daemon_opts", required_argument, NULL, 'O'},
+ {"special", required_argument, NULL, 's'},
+ {"mountpath", required_argument, NULL, 'm'},
+ {"version", no_argument, NULL, 'V'},
+ {"help", no_argument, NULL, 'h'},
+ {0,0,0,0}
+ };
+ int pid = 0;
+ int fd = -1, fdx;
+ char *ep;
+ char *daemon_str = NULL, *daemon_opts = NULL;
+
+ /*
+ * We want a parsing routine which is not sensitive to
+ * the position of args/opts; it should extract the
+ * first two args and stop at the beginning of the rest.
+ * (This makes it easier to call mount_fusefs from external
+ * utils than it is with a strict "util flags args" syntax.)
+ */
+
+ iov = NULL;
+ iovlen = 0;
+ mntflags = 0;
+ /* All in all, I feel it more robust this way... */
+ unsetenv("POSIXLY_CORRECT");
+ if (getenv("MOUNT_FUSEFS_IGNORE_UNKNOWN"))
+ getmnt_silent = 1;
+ if (getenv("MOUNT_FUSEFS_VERBOSE"))
+ verbose = 1;
+
+ do {
+ for (i = 0; i < 3; i++) {
+ if (optind < argc && argv[optind][0] != '-') {
+ if (dir) {
+ done = 1;
+ break;
+ }
+ if (dev)
+ dir = argv[optind];
+ else
+ dev = argv[optind];
+ optind++;
+ }
+ }
+ switch(ch) {
+ case 'A':
+ reject_allow_other = 1;
+ break;
+ case 'S':
+ safe_level = 1;
+ break;
+ case 'D':
+ if (daemon_str)
+ errx(1, "daemon specified inconsistently");
+ daemon_str = optarg;
+ break;
+ case 'O':
+ if (daemon_opts)
+ errx(1, "daemon opts specified inconsistently");
+ daemon_opts = optarg;
+ break;
+ case 'o':
+ getmntopts(optarg, mopts, &mntflags, &altflags);
+ for (mv = mvals; mv->mv_flag; ++mv) {
+ if (! (altflags & mv->mv_flag))
+ continue;
+ for (mo = mopts; mo->m_flag; ++mo) {
+ char *p, *q;
+
+ if (mo->m_flag != mv->mv_flag)
+ continue;
+ p = strstr(optarg, mo->m_option);
+ if (p) {
+ p += strlen(mo->m_option);
+ q = p;
+ while (*q != '\0' && *q != ',')
+ q++;
+ mv->mv_len = q - p + 1;
+ mv->mv_value = malloc(mv->mv_len);
+ memcpy(mv->mv_value, p, mv->mv_len - 1);
+ ((char *)mv->mv_value)[mv->mv_len - 1] = '\0';
+ break;
+ }
+ }
+ }
+ break;
+ case 's':
+ if (devo)
+ errx(1, "special specified inconsistently");
+ devo = optarg;
+ break;
+ case 'm':
+ if (diro)
+ errx(1, "mount path specified inconsistently");
+ diro = optarg;
+ break;
+ case 'v':
+ verbose = 1;
+ break;
+ case 'h':
+ helpmsg();
+ break;
+ case 'V':
+ showversion();
+ break;
+ case '\0':
+ break;
+ case '?':
+ default:
+ usage();
+ }
+ if (done)
+ break;
+ } while ((ch = getopt_long(argc, argv, "AvVho:SD:O:s:m:", longopts, NULL)) != -1);
+
+ argc -= optind;
+ argv += optind;
+
+ if (devo) {
+ if (dev)
+ errx(1, "special specified inconsistently");
+ dev = devo;
+ } else if (diro)
+ errx(1, "if mountpoint is given via an option, special should also be given via an option");
+
+ if (diro) {
+ if (dir)
+ errx(1, "mount path specified inconsistently");
+ dir = diro;
+ }
+
+ if ((! dev) && argc > 0) {
+ dev = *argv++;
+ argc--;
+ }
+
+ if ((! dir) && argc > 0) {
+ dir = *argv++;
+ argc--;
+ }
+
+ if (! (dev && dir))
+ errx(1, "missing special and/or mountpoint");
+
+ for (mo = mopts; mo->m_flag; ++mo) {
+ if (altflags & mo->m_flag) {
+ int iov_done = 0;
+
+ if (reject_allow_other &&
+ strcmp(mo->m_option, "allow_other") == 0)
+ /*
+ * reject_allow_other is stronger than a
+ * negative of allow_other: if this is set,
+ * allow_other is blocked, period.
+ */
+ errx(1, "\"allow_other\" usage is banned by respective option");
+
+ for (mv = mvals; mv->mv_flag; ++mv) {
+ if (mo->m_flag != mv->mv_flag)
+ continue;
+ if (mv->mv_value) {
+ build_iovec(&iov, &iovlen, mo->m_option, mv->mv_value, mv->mv_len);
+ iov_done = 1;
+ break;
+ }
+ }
+ if (! iov_done)
+ build_iovec(&iov, &iovlen, mo->m_option,
+ __DECONST(void *, ""), -1);
+ }
+ if (__altflags & mo->m_flag) {
+ char *uscore_opt;
+
+ if (asprintf(&uscore_opt, "__%s", mo->m_option) == -1)
+ err(1, "failed to allocate memory");
+ build_iovec(&iov, &iovlen, uscore_opt,
+ __DECONST(void *, ""), -1);
+ free(uscore_opt);
+ }
+ }
+
+ if (getenv("MOUNT_FUSEFS_SAFE"))
+ safe_level = 1;
+
+ if (safe_level > 0 && (argc > 0 || daemon_str || daemon_opts))
+ errx(1, "safe mode, spawning daemon not allowed");
+
+ if ((argc > 0 && (daemon_str || daemon_opts)) ||
+ (daemon_opts && ! daemon_str))
+ errx(1, "daemon specified inconsistently");
+
+ /*
+ * Resolve the mountpoint with realpath(3) and remove unnecessary
+ * slashes from the devicename if there are any.
+ */
+ if (checkpath(dir, mntpath) != 0)
+ err(1, "%s", mntpath);
+ (void)rmslashes(dev, dev);
+
+ if (strcmp(dev, "auto") == 0)
+ dev = __DECONST(char *, "/dev/fuse");
+
+ if (strcmp(dev, "/dev/fuse") == 0) {
+ if (! (argc > 0 || daemon_str)) {
+ fprintf(stderr, "Please also specify the fuse daemon to run when mounting via the multiplexer!\n");
+ usage();
+ }
+ if ((fd = open(dev, O_RDWR)) < 0)
+ err(1, "failed to open fuse device");
+ } else {
+ fdx = strtol(dev, &ep, 10);
+ if (*ep == '\0')
+ fd = fdx;
+ }
+
+ /* Identifying device */
+ if (fd >= 0) {
+ struct stat sbuf;
+ char *ndevbas, *lep;
+
+ if (fstat(fd, &sbuf) == -1)
+ err(1, "cannot stat device file descriptor");
+
+ strcpy(ndev, _PATH_DEV);
+ ndevbas = ndev + strlen(_PATH_DEV);
+ devname_r(sbuf.st_rdev, S_IFCHR, ndevbas,
+ sizeof(ndev) - strlen(_PATH_DEV));
+
+ if (strncmp(ndevbas, "fuse", 4))
+ errx(1, "mounting inappropriate device");
+
+ strtol(ndevbas + 4, &lep, 10);
+ if (*lep != '\0')
+ errx(1, "mounting inappropriate device");
+
+ dev = ndev;
+ }
+
+ if (argc > 0 || daemon_str) {
+ char *fds;
+
+ if (fd < 0 && (fd = open(dev, O_RDWR)) < 0)
+ err(1, "failed to open fuse device");
+
+ if (asprintf(&fds, "%d", fd) == -1)
+ err(1, "failed to allocate memory");
+ setenv("FUSE_DEV_FD", fds, 1);
+ free(fds);
+ setenv("FUSE_NO_MOUNT", "1", 1);
+
+ if (daemon_str) {
+ char *bgdaemon;
+ int len;
+
+ if (! daemon_opts)
+ daemon_opts = __DECONST(char *, "");
+
+ len = strlen(daemon_str) + 1 + strlen(daemon_opts) +
+ 2 + 1;
+ bgdaemon = calloc(1, len);
+
+ if (! bgdaemon)
+ err(1, "failed to allocate memory");
+
+ strlcpy(bgdaemon, daemon_str, len);
+ strlcat(bgdaemon, " ", len);
+ strlcat(bgdaemon, daemon_opts, len);
+ strlcat(bgdaemon, " &", len);
+
+ if (system(bgdaemon))
+ err(1, "failed to call fuse daemon");
+ } else {
+ if ((pid = fork()) < 0)
+ err(1, "failed to fork for fuse daemon");
+
+ if (pid == 0) {
+ execvp(argv[0], argv);
+ err(1, "failed to exec fuse daemon");
+ }
+ }
+ }
+
+ if (fd >= 0 && ! init_backgrounded() && close(fd) < 0) {
+ if (pid)
+ kill(pid, SIGKILL);
+ err(1, "failed to close fuse device");
+ }
+
+ /* Prepare the options vector for nmount(). build_iovec() is declared
+ * in mntopts.h. */
+ sprintf(fdstr, "%d", fd);
+ build_iovec(&iov, &iovlen, "fstype", __DECONST(void *, "fusefs"), -1);
+ build_iovec(&iov, &iovlen, "fspath", mntpath, -1);
+ build_iovec(&iov, &iovlen, "from", dev, -1);
+ build_iovec(&iov, &iovlen, "fd", fdstr, -1);
+
+ if (verbose)
+ fprintf(stderr, "mounting fuse daemon on device %s\n", dev);
+
+ if (nmount(iov, iovlen, mntflags) < 0)
+ err(EX_OSERR, "%s on %s", dev, mntpath);
+
+ exit(0);
+}
+
+void
+__usage_short(void) {
+ fprintf(stderr,
+ "usage:\n%s [-A|-S|-v|-V|-h|-D daemon|-O args|-s special|-m node|-o option...] special node [daemon args...]\n\n",
+ getprogname());
+}
+
+void
+usage(void)
+{
+ struct mntopt *mo;
+
+ __usage_short();
+
+ fprintf(stderr, "known options:\n");
+ for (mo = mopts; mo->m_flag; ++mo)
+ fprintf(stderr, "\t%s\n", mo->m_option);
+
+ fprintf(stderr, "\n(use -h for a detailed description of these options)\n");
+ exit(EX_USAGE);
+}
+
+void
+helpmsg(void)
+{
+ if (! getenv("MOUNT_FUSEFS_CALL_BY_LIB")) {
+ __usage_short();
+ fprintf(stderr, "description of options:\n");
+ }
+
+ /*
+ * The main use case of this function is giving info embedded in general
+ * FUSE lib help output. Therefore the style and the content of the output
+ * tries to fit there as much as possible.
+ */
+ fprintf(stderr,
+ " -o allow_other allow access to other users\n"
+ /* " -o nonempty allow mounts over non-empty file/dir\n" */
+ " -o default_permissions enable permission checking by kernel\n"
+ /*
+ " -o fsname=NAME set filesystem name\n"
+ " -o large_read issue large read requests (2.4 only)\n"
+ */
+ " -o subtype=NAME set filesystem type\n"
+ " -o max_read=N set maximum size of read requests\n"
+ " -o noprivate allow secondary mounting of the filesystem\n"
+ " -o neglect_shares don't report EBUSY when unmount attempted\n"
+ " in presence of secondary mounts\n"
+ " -o push_symlinks_in prefix absolute symlinks with mountpoint\n"
+ " -o sync_unmount do unmount synchronously\n"
+ );
+ exit(EX_USAGE);
+}
+
+void
+showversion(void)
+{
+ puts("mount_fusefs [fuse4bsd] version: " FUSE4BSD_VERSION);
+ exit(EX_USAGE);
+}
+
+int
+init_backgrounded(void)
+{
+ int ibg;
+ size_t len;
+
+ len = sizeof(ibg);
+
+ if (sysctlbyname("vfs.fuse.init_backgrounded", &ibg, &len, NULL, 0))
+ return (0);
+
+ return (ibg);
+}
Property changes on: trunk/sbin/mount_fusefs/mount_fusefs.c
___________________________________________________________________
Added: svn:eol-style
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+native
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+MidnightBSD=%H
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Added: svn:mime-type
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+text/plain
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