| 1 | #!/bin/sh
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| 2 | #
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| 3 | # File: mount
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| 4 | # $Id: mount,v 1.2 2010/03/24 21:28:27 keithmarshall Exp $
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| 5 | #
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| 6 | # =====================================================================
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| 7 | #
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| 8 | # Copyright (C) 2006, 2007, 2009, 2010 by Keith Marshall
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| 9 | # mailto:keithmarshall@users.sourceforge.net
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| 10 | #
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| 11 | # This file is part of MSYS
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| 12 | # http://www.mingw.org/msys.shtml
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| 13 | #
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| 14 | # 2009-04-06: First published implementation for MSYS-1.0.11
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| 15 | # 2010-03-24: Updated for MSYS-1.0.14: --replace option added
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| 16 | #
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| 17 | # MSYS is free software. It is provided "as is", in the hope that it
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| 18 | # may be useful; there is NO WARRANTY OF ANY KIND, not even an implied
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| 19 | # warranty of MERCHANTABILITY or FITNESS FOR ANY PARTICULAR PURPOSE.
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| 20 | # At no time will the author accept liability for damages, however
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| 21 | # caused, resulting from the use of this software.
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| 22 | #
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| 23 | # Permission is granted to copy and redistribute this software, either
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| 24 | # as is, or in modified form, provided that:--
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| 25 | #
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| 26 | # 1) All such copies are distributed with the same rights
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| 27 | # of redistribution.
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| 28 | #
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| 29 | # 2) The preceding disclaimer of warranty and liabality is
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| 30 | # retained verbatim, in all copies.
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| 31 | #
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| 32 | # 3) Accreditation of the original author remains in place.
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| 33 | #
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| 34 | # 4) Modified copies are clearly identified as such, with
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| 35 | # additional accreditation given to the authors of each
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| 36 | # modified version.
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| 37 | #
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| 38 | # =====================================================================
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| 39 | #
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| 40 | #
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| 41 | # Ensure the the `fstab' mount registry exists, and is writeable.
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| 42 | #
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| 43 | >> ${MNTTAB="/etc/fstab"}
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| 44 | #
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| 45 | # Check for '--replace' option, so we can honour requests to reassign
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| 46 | # an existing mount table entry.
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| 47 | #
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| 48 | case $1 in
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| 49 | --replace | --replac | --repla | --repl) shift ; replace=yes ;;
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| 50 | *) replace=no ;;
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| 51 | esac
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| 52 | #
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| 53 | # Select the operation to be performed, based on number of argumemnts.
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| 54 | #
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| 55 | case $# in
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| 56 | 0)
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| 57 | #
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| 58 | # No arguments specified...
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| 59 | # Simply report the current state of the mount table.
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| 60 | #
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| 61 | /bin/msysmnt.exe ;;
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| 62 | #
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| 63 | 1)
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| 64 | #
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| 65 | # One argument specified...
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| 66 | # Check for any pre-existing mount which may conflict; if none,
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| 67 | # try to match it to a default mount specification from the `fstab'
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| 68 | # configuration file, and mount the specified directory, if any,
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| 69 | # on its associated mount point.
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| 70 | #
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| 71 | FSTAB=${FSTAB-"$MNTTAB.conf"}
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| 72 | MNTPATH=`echo "$1" | tr '\\\\' /`
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| 73 | #
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| 74 | if cat $MNTTAB | tr '\\' / | awk '
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| 75 | #
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| 76 | # Check for pre-existing mount of specified argument;
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| 77 | # set exit status to:--
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| 78 | # 0: if no such mount exists;
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| 79 | # 1: if argument is an already mounted directory;
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| 80 | # 2: if argument is a mount point already in use.
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| 81 | #
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| 82 | BEGIN { status = 0 }
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| 83 | /^#/ { $0 = "" }
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| 84 | $1 == "'$MNTPATH'" { status = 1 }
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| 85 | $2 == "'$MNTPATH'" { status = 2 }
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| 86 | END { exit status }'
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| 87 | then
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| 88 | #
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| 89 | # No pre-existing mount conflicts...
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| 90 | #
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| 91 | if WINPATH=`cat 2>/dev/null $FSTAB | tr '\\' / | awk '
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| 92 | #
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| 93 | # Look up the default mount point specification;
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| 94 | # set exit status, (assigned to "errno"), to:--
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| 95 | # 0: if found; (it is assigned to WINPATH);
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| 96 | # 1: if found, but multiply and ambiguously defined;
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| 97 | # 2: if not found.
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| 98 | #
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| 99 | BEGIN { status = 0; mount = "" }
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| 100 | /^#/ { $0 = "" }
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| 101 | $1 == "'$MNTPATH'" {
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| 102 | if( mount == "" ) mount = $0
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| 103 | else if( mount != $0 ) status = 1
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| 104 | }
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| 105 | $2 == "'$MNTPATH'" {
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| 106 | if( mount == "" ) mount = $0
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| 107 | else if( mount != $0 ) status = 1
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| 108 | }
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| 109 | END {
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| 110 | if( mount == "" ) exit 2
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| 111 | print mount
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| 112 | exit status
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| 113 | }'` errno=$?
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| 114 | then
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| 115 | #
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| 116 | # Found a default mount specification; activate it.
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| 117 | #
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| 118 | echo $WINPATH >> $MNTTAB
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| 119 | #
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| 120 | elif test -f $FSTAB && test -r $FSTAB
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| 121 | then
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| 122 | #
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| 123 | # Read the configuration file, but could not find
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| 124 | # a mount specification matching the argument.
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| 125 | #
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| 126 | case $errno in
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| 127 | 1) echo >&2 "$0: $FSTAB: ambiguous reference for $MNTPATH" ;;
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| 128 | 2) echo >&2 "$0: $FSTAB: no mount specification for $MNTPATH" ;;
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| 129 | esac
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| 130 | #
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| 131 | elif test -f $FSTAB
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| 132 | then
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| 133 | #
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| 134 | # Found the configuration file, but could not read it.
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| 135 | #
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| 136 | echo >&2 "$0: $FSTAB: cannot read configuration file"
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| 137 | #
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| 138 | else
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| 139 | #
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| 140 | # Could not find the configuration file.
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| 141 | #
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| 142 | echo >&2 "$0: $FSTAB: configuration file not found"
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| 143 | fi
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| 144 | #
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| 145 | elif test x"$replace" = xyes
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| 146 | then
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| 147 | #
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| 148 | # Found a conflicting active mount,
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| 149 | # but the 'replace' option WAS specified...
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| 150 | # Tear it down, and remount.
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| 151 | #
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| 152 | umount $MNTPATH
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| 153 | mount $MNTPATH
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| 154 | exit $?
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| 155 | #
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| 156 | else
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| 157 | #
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| 158 | # Found a conflicting active mount,
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| 159 | # and the 'replace' option was NOT specified...
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| 160 | # Display an appropriate diagnostic message, depending on
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| 161 | # whether the argument represented a directory path name,
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| 162 | # or a mount point, and bail out.
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| 163 | #
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| 164 | case $? in
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| 165 | 1) echo >&2 "$0: '$MNTPATH' is already mounted" ;;
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| 166 | 2) echo >&2 "$0: mount point '$MNTPATH' is already in use" ;;
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| 167 | esac
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| 168 | exit 1
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| 169 | fi ;;
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| 170 | #
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| 171 | 2)
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| 172 | #
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| 173 | # Two arguments specified...
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| 174 | # First is directory path name, second is mount point.
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| 175 | #
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| 176 | WINPATH=`echo "$1" | tr '\\\\' /`
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| 177 | MNTPATH=`echo "$2" | tr '\\\\' /`
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| 178 | #
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| 179 | if cat $MNTTAB | tr '\\' / | awk '
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| 180 | #
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| 181 | # Check that the mount point is not already in use;
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| 182 | # set exit status to:--
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| 183 | # 0: if no existing mount table entry matches;
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| 184 | # 1: if mount point already in mount table.
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| 185 | #
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| 186 | BEGIN { status = 0 }
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| 187 | /^#/ { $0 = "" }
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| 188 | $2 == "'$MNTPATH'" { status = 1 }
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| 189 | END { exit status }'
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| 190 | then
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| 191 | #
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| 192 | # Mount point not yet assigned...
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| 193 | # Update the mount table, to include the new specification.
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| 194 | #
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| 195 | echo -e "$WINPATH\t$MNTPATH" >> "$MNTTAB"
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| 196 | #
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| 197 | elif test x"$replace" = xyes
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| 198 | then
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| 199 | #
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| 200 | # The mount point is already in use,
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| 201 | # but the 'replace' option WAS specified...
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| 202 | # Tear it down, and remount.
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| 203 | #
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| 204 | umount $MNTPATH
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| 205 | echo -e "$WINPATH\t$MNTPATH" >> "$MNTTAB"
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| 206 | #
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| 207 | else
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| 208 | #
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| 209 | # Mount point is already in use,
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| 210 | # and the 'replace' option was NOT specified...
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| 211 | # Diagnose, and bail out.
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| 212 | #
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| 213 | echo >&2 "$0: mount point '$MNTPATH' is already in use"
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| 214 | exit 1
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| 215 | fi ;;
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| 216 | #
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| 217 | *)
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| 218 | #
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| 219 | # More than two arguments specified...
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| 220 | # Complain, and bail out.
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| 221 | #
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| 222 | echo >&2 "$0: incorrect number of arguments"
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| 223 | echo >&2 "usage: mount [--replace] [<win32path> <msyspath>]"
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| 224 | exit 2 ;;
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| 225 | esac
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| 226 | #
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| 227 | # On successful completion, ensure we set the exit status appropriately.
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| 228 | #
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| 229 | exit 0
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| 230 | #
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| 231 | # $RCSfile: mount,v $: end of file
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