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#!/bin/sh |
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# |
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# File: umount |
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# $Id: umount,v 1.2 2010/03/24 21:28:30 keithmarshall Exp $ |
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# |
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# ===================================================================== |
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# |
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# Copyright (C) 2006, 2007, 2009 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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# |
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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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# Exactly one argument is required... |
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# |
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if test $# -eq 1 |
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then |
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# |
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# Normally, it specifies the mount point to be released, |
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# but it may also represent a mounted directory path name, |
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# for which all bound mount points are to be filtered out |
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# of the "mount table" file. |
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# |
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MNTPATH=`echo "$1" | tr '\\\\' /` |
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TMPFILE=${TMPDIR-"/tmp"}/mnttab$$.tmp |
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MNTTAB=${MNTTAB-"/etc/fstab"} |
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# |
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if cat "$MNTTAB" | tr '\\' / | awk ' |
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# |
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# Copy the "mount table" to a temporary file, filtering |
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# out all active mount point records which match MNTPATH, |
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# (the specified argument); set exit status to:-- |
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# 0: if at least one mount point is matched; |
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# 1: if no match is found. |
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# |
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BEGIN { status = 1 } |
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{ keep = $0 } |
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/^#/ { print; keep = "no"; $0 = "!'$MNTPATH'" } |
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$2 == "'$MNTPATH'" { keep = "no"; status = 0 } |
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{ $2 = "!" } $0 == "'$MNTPATH' !" { keep = "no"; status = 0 } |
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keep != "no" { print keep } |
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END { exit status }' > "$TMPFILE" |
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then |
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# |
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# At least one mount point was selected to release... |
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# Replace the active "mount table" file with the regenerated |
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# copy, so completing the operation. |
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# |
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cp "$TMPFILE" "$MNTTAB" |
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rm -f "$TMPFILE" |
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# |
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else |
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# |
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# No active mount point matched the specified argument... |
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# Discard the temporary file, complain, and bail out. |
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# |
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rm -f "$TMPFILE" |
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echo >&2 "$0: '$1' is not mounted" |
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exit 1 |
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fi |
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# |
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else |
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# |
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# The command line did not specify exactly one argument... |
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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: umount <path>" |
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exit 2 |
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fi |
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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: umount,v $: end of file |
