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#!/bin/sh |
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# |
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# File: mount |
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# $Id: mount,v 1.2 2010/03/24 21:28:27 keithmarshall Exp $ |
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# |
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# ===================================================================== |
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# |
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# Copyright (C) 2006, 2007, 2009, 2010 by Keith Marshall |
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# mailto:keithmarshall@users.sourceforge.net |
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# |
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# This file is part of MSYS |
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# http://www.mingw.org/msys.shtml |
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# |
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# 2009-04-06: First published implementation for MSYS-1.0.11 |
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# 2010-03-24: Updated for MSYS-1.0.14: --replace option added |
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# |
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# MSYS is free software. It is provided "as is", in the hope that it |
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# may be useful; there is NO WARRANTY OF ANY KIND, not even an implied |
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# warranty of MERCHANTABILITY or FITNESS FOR ANY PARTICULAR PURPOSE. |
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# At no time will the author accept liability for damages, however |
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# caused, resulting from the use of this software. |
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# |
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# Permission is granted to copy and redistribute this software, either |
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# as is, or in modified form, provided that:-- |
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# |
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# 1) All such copies are distributed with the same rights |
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# of redistribution. |
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# |
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# 2) The preceding disclaimer of warranty and liabality is |
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# retained verbatim, in all copies. |
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# |
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# 3) Accreditation of the original author remains in place. |
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# |
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# 4) Modified copies are clearly identified as such, with |
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# additional accreditation given to the authors of each |
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# modified version. |
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# |
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# ===================================================================== |
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# |
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# |
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# Ensure the the `fstab' mount registry exists, and is writeable. |
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# |
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>> ${MNTTAB="/etc/fstab"} |
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# |
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# Check for '--replace' option, so we can honour requests to reassign |
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# an existing mount table entry. |
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# |
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case $1 in |
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--replace | --replac | --repla | --repl) shift ; replace=yes ;; |
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*) replace=no ;; |
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esac |
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# |
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# Select the operation to be performed, based on number of argumemnts. |
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# |
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case $# in |
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0) |
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# |
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# No arguments specified... |
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# Simply report the current state of the mount table. |
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# |
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/bin/msysmnt.exe ;; |
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# |
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1) |
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# |
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# One argument specified... |
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# Check for any pre-existing mount which may conflict; if none, |
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# try to match it to a default mount specification from the `fstab' |
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# configuration file, and mount the specified directory, if any, |
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# on its associated mount point. |
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# |
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FSTAB=${FSTAB-"$MNTTAB.conf"} |
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MNTPATH=`echo "$1" | tr '\\\\' /` |
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# |
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if cat $MNTTAB | tr '\\' / | awk ' |
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# |
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# Check for pre-existing mount of specified argument; |
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# set exit status to:-- |
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# 0: if no such mount exists; |
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# 1: if argument is an already mounted directory; |
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# 2: if argument is a mount point already in use. |
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# |
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BEGIN { status = 0 } |
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/^#/ { $0 = "" } |
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$1 == "'$MNTPATH'" { status = 1 } |
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$2 == "'$MNTPATH'" { status = 2 } |
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END { exit status }' |
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then |
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# |
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# No pre-existing mount conflicts... |
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# |
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if WINPATH=`cat 2>/dev/null $FSTAB | tr '\\' / | awk ' |
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# |
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# Look up the default mount point specification; |
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# set exit status, (assigned to "errno"), to:-- |
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# 0: if found; (it is assigned to WINPATH); |
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# 1: if found, but multiply and ambiguously defined; |
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# 2: if not found. |
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# |
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BEGIN { status = 0; mount = "" } |
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/^#/ { $0 = "" } |
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$1 == "'$MNTPATH'" { |
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if( mount == "" ) mount = $0 |
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else if( mount != $0 ) status = 1 |
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} |
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$2 == "'$MNTPATH'" { |
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if( mount == "" ) mount = $0 |
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else if( mount != $0 ) status = 1 |
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} |
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END { |
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if( mount == "" ) exit 2 |
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print mount |
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exit status |
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}'` errno=$? |
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then |
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# |
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# Found a default mount specification; activate it. |
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# |
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echo $WINPATH >> $MNTTAB |
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# |
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elif test -f $FSTAB && test -r $FSTAB |
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then |
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# |
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# Read the configuration file, but could not find |
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# a mount specification matching the argument. |
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# |
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case $errno in |
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1) echo >&2 "$0: $FSTAB: ambiguous reference for $MNTPATH" ;; |
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2) echo >&2 "$0: $FSTAB: no mount specification for $MNTPATH" ;; |
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esac |
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# |
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elif test -f $FSTAB |
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then |
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# |
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# Found the configuration file, but could not read it. |
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# |
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echo >&2 "$0: $FSTAB: cannot read configuration file" |
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# |
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else |
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# |
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# Could not find the configuration file. |
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# |
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echo >&2 "$0: $FSTAB: configuration file not found" |
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fi |
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# |
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elif test x"$replace" = xyes |
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then |
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# |
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# Found a conflicting active mount, |
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# but the 'replace' option WAS specified... |
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# Tear it down, and remount. |
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# |
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umount $MNTPATH |
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mount $MNTPATH |
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exit $? |
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# |
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else |
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# |
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# Found a conflicting active mount, |
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# and the 'replace' option was NOT specified... |
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# Display an appropriate diagnostic message, depending on |
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# whether the argument represented a directory path name, |
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# or a mount point, and bail out. |
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# |
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case $? in |
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1) echo >&2 "$0: '$MNTPATH' is already mounted" ;; |
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2) echo >&2 "$0: mount point '$MNTPATH' is already in use" ;; |
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esac |
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exit 1 |
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fi ;; |
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# |
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2) |
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# |
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# Two arguments specified... |
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# First is directory path name, second is mount point. |
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# |
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WINPATH=`echo "$1" | tr '\\\\' /` |
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MNTPATH=`echo "$2" | tr '\\\\' /` |
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# |
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if cat $MNTTAB | tr '\\' / | awk ' |
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# |
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# Check that the mount point is not already in use; |
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# set exit status to:-- |
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# 0: if no existing mount table entry matches; |
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# 1: if mount point already in mount table. |
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# |
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BEGIN { status = 0 } |
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/^#/ { $0 = "" } |
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$2 == "'$MNTPATH'" { status = 1 } |
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END { exit status }' |
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then |
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# |
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# Mount point not yet assigned... |
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# Update the mount table, to include the new specification. |
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# |
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echo -e "$WINPATH\t$MNTPATH" >> "$MNTTAB" |
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# |
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elif test x"$replace" = xyes |
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then |
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# |
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# The mount point is already in use, |
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# but the 'replace' option WAS specified... |
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# Tear it down, and remount. |
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# |
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umount $MNTPATH |
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echo -e "$WINPATH\t$MNTPATH" >> "$MNTTAB" |
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# |
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else |
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# |
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# Mount point is already in use, |
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# and the 'replace' option was NOT specified... |
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# Diagnose, and bail out. |
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# |
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echo >&2 "$0: mount point '$MNTPATH' is already in use" |
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exit 1 |
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fi ;; |
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# |
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*) |
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# |
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# More than two arguments specified... |
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# Complain, and bail out. |
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# |
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echo >&2 "$0: incorrect number of arguments" |
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echo >&2 "usage: mount [--replace] [<win32path> <msyspath>]" |
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exit 2 ;; |
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esac |
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# |
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# On successful completion, ensure we set the exit status appropriately. |
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# |
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exit 0 |
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# |
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# $RCSfile: mount,v $: end of file |
