#!/bin/sh

#

# CDDL HEADER START

#

# The contents of this file are subject to the terms of the

# Common Development and Distribution License (the "License").

# You may not use this file except in compliance with the License.

#

# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

# or http://www.opensolaris.org/os/licensing.

# See the License for the specific language governing permissions

# and limitations under the License.

#

# When distributing Covered Code, include this CDDL HEADER in each

# file and include the License file at usr/src/OPENSOLARIS.LICENSE.

# If applicable, add the following below this CDDL HEADER, with the

# fields enclosed by brackets "[]" replaced with your own identifying

# information: Portions Copyright [yyyy] [name of copyright owner]

#

# CDDL HEADER END

#

#

# Copyright 2008 Sun Microsystems, Inc.  All rights reserved.

# Use is subject to license terms.

#

# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T.

# All rights reserved.

#

#

#ident	"%Z%%M%	%I%	%E% SMI"

vfstab=${vfstab:=/etc/vfstab}

#

# readvfstab mount_point

#   -> (special, fsckdev, mountp, fstype, fsckpass, automnt, mntopts)

#

#   A vfstab-like input stream is scanned for the mount point specified

#   as $1.  Returns the fields of vfstab in the following shell

#   variables:

#

#       special		block device

#       fsckdev		raw device

#       mountp		mount point (must match $1, if found)

#       fstype		file system type

#       fsckpass	fsck(1M) pass number

#       automnt		automount flag (yes or no)

#       mntopts		file system-specific mount options.

#

#   If the mount point can not be found in the standard input stream,

#   then all fields are set to empty values.  This function assumes that

#   stdin is already set /etc/vfstab (or other appropriate input

#   stream).

#

readvfstab() {

	while read special fsckdev mountp fstype fsckpass automnt mntopts; do

		case "$special" in

			'' )	# Ignore empty lines.

				continue

				;;

			'#'* )	# Ignore comment lines.

				continue

				;;

			'-')	# Ignore "no-action" lines.

				continue

				;;

		esac

		[ "x$mountp" = "x$1" ] && break

	done

}

#

# readmnttab mount_point

#   -> (special, mountp, fstype, mntopts, mnttime)

#

#   A mnttab-like input stream is scanned for the mount point specified

#   as $1.  Returns the fields of mnttab in the following shell

#   variables:

#

#       special		block device

#       mountp		mount point (must match $1, if found)

#       fstype		file system type

#       mntopts		file system-specific mount options.

#	mnttime		time at which file system was mounted

#

#   If the mount point can not be found in the standard input stream,

#   then all fields are set to empty values.  This function assumes that

#   stdin is already set to /etc/mnttab (or other appropriate input

#   stream).

#

readmnttab() {

	while read special mountp fstype mntopts mnttime; do

		[ "x$mountp" = "x$1" ] && break

	done

}

cecho() {

	echo $*

	echo $* >/dev/msglog

}

#

# checkmessage raw_device fstype mountpoint

# checkmessage2 raw_device fstype mountpoint

#

#   Two simple auxilary routines to the shell function checkfs.  Both

#   display instructions for a manual file system check.

#

checkmessage() {

	cecho ""

	cecho "WARNING - Unable to repair the $3 filesystem. Run fsck"

	cecho "manually (fsck -F $2 $1)."

	cecho ""

}

checkmessage2() {

	cecho ""

	cecho "WARNING - fatal error from fsck - error $4"

	cecho "Unable to repair the $3 filesystem. Run fsck manually"

	cecho "(fsck -F $2 $1)."

	cecho ""

}

#

# checkfs raw_device fstype mountpoint

#

#   Check the file system specified. The return codes from fsck have the

#   following meanings.

#

#	 0	file system is unmounted and okay

#	32	file system is unmounted and needs checking (fsck -m only)

#	33	file system is already mounted

#	34	cannot stat device

#	35	modified root or something equally dangerous

#	36	uncorrectable errors detected - terminate normally (4.1 code 8)

#	37	a signal was caught during processing (4.1 exit 12)

#	39	uncorrectable errors detected - terminate rightaway (4.1 code 8)

#	40	 for root, same as 0 (used here to remount root)

#

checkfs() {

	# skip checking if the fsckdev is "-"

	[ "x$1" = x- ] && return

	# if fsck isn't present, it is probably because either the mount of

	# /usr failed or the /usr filesystem is badly damanged.  In either

	# case, there is not much to be done automatically.  Fail with

	# a message to the user.

	if [ ! -x /usr/sbin/fsck ]; then

		cecho ""

		cecho "WARNING - /usr/sbin/fsck not found.  Most likely the"

		cecho "mount of /usr failed or the /usr filesystem is badly"

		cecho "damaged."

		cecho ""

		return 1

	fi

	# If a filesystem-specific fsck binary is unavailable, then no

	# fsck pass is required.

	[ ! -x /usr/lib/fs/$2/fsck ] && [ ! -x /etc/fs/$2/fsck ] && return

	/usr/sbin/fsck -F $2 -m $1 >/dev/null 2>&1

	if [ $? -ne 0 ]; then

		# Determine fsck options by file system type

		case $2 in

			ufs)	foptions="-o p"

				;;

			*)	foptions="-y"

				;;

		esac

		cecho "The $3 file system ($1) is being checked."

		/usr/sbin/fsck -F $2 $foptions $1

		case $? in

		0|40)	# File system OK

			;;

		1|34|36|37|39)	# couldn't fix the file system - fail

			checkmessage "$1" "$2" "$3"

			return 1

			;;

		33)	# already mounted

			return 0

			;;

		*)	# fsck child process killed (+ error code 35)

			checkmessage2 "$1" "$2" "$3" "$?"

			return 1

			;;

		esac

	fi

	return 0

}

#

# checkopt option option-string

# -> ($option, $otherops)

#

#   Check to see if a given mount option is present in the comma

#   separated list gotten from vfstab.

#

#	Returns:

#	${option}       : the option if found the empty string if not found

#	${otherops}     : the option string with the found option deleted

#

checkopt() {

	option=

	otherops=

	[ "x$2" = x- ] && return

	searchop="$1"

	set -- `IFS=, ; echo $2`

	while [ $# -gt 0 ]; do

		if [ "x$1" = "x$searchop" ]; then

			option="$1"

		else

			if [ -z "$otherops" ]; then

				otherops="$1"

			else

				otherops="${otherops},$1"

			fi

		fi

		shift

	done

}

#

# hasopts $opts $allopts

#

#   Check if all options from the list $opts are present in $allopts.

#   Both $opts and $allopts should be in comma separated format.

#

# Return 0 on success, and 1 otherwise.

#

hasopts() {

	opts="$1"

	allopts="$2"

	set -- `IFS=, ; echo $opts`

	while [ $# -gt 0 ]; do

		if [ "$1" != "remount" ]; then

			checkopt $1 $allopts

			#

			# Don't report errors if the filesystem is already

			# read-write when mounting it as read-only.

			#

			[ -z "$option" ] && [ "$1" = "ro" ] && \

				checkopt rw $allopts

			[ -z "$option" ] && return 1

		fi

		shift

	done

	return 0

}

#

# mounted $path $fsopts $fstype

#

#   Check whether the specified file system of the given type is currently

#   mounted with all required filesystem options by going through /etc/mnttab

#   in our standard input.

#

#   Return values:

#   0	Success.

#   1	The filesystem is not currently mounted, or mounted without required

#	options, or a filesystem of a different type is mounted instead.

#

mounted() {

	path="$1"

	fsopts="$2"

	fstype="$3"

	while read mntspec mntpath mnttype mntopts on; do

		[ "$mntpath" = "$path" ] || continue

		[ "$fstype" != "-" ] && [ "$mnttype" != "$fstype" ] && return 1

		[ "$fsopts" = "-" ] && return 0

		hasopts $fsopts $mntopts && return 0

	done

	return 1

}

#

# mountfs $opts $path $type $fsopts $special

#

#   Try to mount a filesystem.  If failed, display our standard error

#   message on the console and print more details about what happened 

#   to our service log.

#

# Arguments:

#   $opts	- options for mount(1M)				[optional]

#   $path	- mount point

#   $type	- file system type				[optional]

#   $fsopts	- file system specific options (-o)		[optional]

#   $special	- device on which the file system resides	[optional]

#

# Return codes:

#   0		- success.

#   otherwise	- error code returned by mount(1M).

#

mountfs() {

	opts="$1"

	path="$2"

	special="$5"

	#

	# Take care of optional arguments

	#

	[ "$opts" = "-" ] && opts=""

	[ "$special" = "-" ] &&	special=""

	[ "$3" = "-" ] && type=""

	[ "$3" != "-" ] && type="-F $3"

	[ "$4" = "-" ] && fsopts=""

	[ "$4" != "-" ] && fsopts="-o $4"

	cmd="/sbin/mount $opts $type $fsopts $special $path"

	msg=`$cmd 2>&1`

	err=$?

	[ $err = 0 ] && return 0

	#

	# If the specified file system is already mounted with all

	# required options, and has the same filesystem type

	# then ignore errors and return success

	#

	mounted $path $4 $3 < /etc/mnttab && return 0

	echo "ERROR: $SMF_FMRI failed to mount $path "\

	     "(see 'svcs -x' for details)" > /dev/msglog

	echo "ERROR: $cmd failed, err=$err"

	echo $msg

	return $err

}