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Annotation of tme/libltdl/install-sh, revision 1.1

1.1     ! root        1: #!/bin/sh
        !             2: #
        !             3: # install - install a program, script, or datafile
        !             4: # This comes from X11R5 (mit/util/scripts/install.sh).
        !             5: #
        !             6: # Copyright 1991 by the Massachusetts Institute of Technology
        !             7: #
        !             8: # Permission to use, copy, modify, distribute, and sell this software and its
        !             9: # documentation for any purpose is hereby granted without fee, provided that
        !            10: # the above copyright notice appear in all copies and that both that
        !            11: # copyright notice and this permission notice appear in supporting
        !            12: # documentation, and that the name of M.I.T. not be used in advertising or
        !            13: # publicity pertaining to distribution of the software without specific,
        !            14: # written prior permission.  M.I.T. makes no representations about the
        !            15: # suitability of this software for any purpose.  It is provided "as is"
        !            16: # without express or implied warranty.
        !            17: #
        !            18: # Calling this script install-sh is preferred over install.sh, to prevent
        !            19: # `make' implicit rules from creating a file called install from it
        !            20: # when there is no Makefile.
        !            21: #
        !            22: # This script is compatible with the BSD install script, but was written
        !            23: # from scratch.  It can only install one file at a time, a restriction
        !            24: # shared with many OS's install programs.
        !            25: 
        !            26: 
        !            27: # set DOITPROG to echo to test this script
        !            28: 
        !            29: # Don't use :- since 4.3BSD and earlier shells don't like it.
        !            30: doit="${DOITPROG-}"
        !            31: 
        !            32: 
        !            33: # put in absolute paths if you don't have them in your path; or use env. vars.
        !            34: 
        !            35: mvprog="${MVPROG-mv}"
        !            36: cpprog="${CPPROG-cp}"
        !            37: chmodprog="${CHMODPROG-chmod}"
        !            38: chownprog="${CHOWNPROG-chown}"
        !            39: chgrpprog="${CHGRPPROG-chgrp}"
        !            40: stripprog="${STRIPPROG-strip}"
        !            41: rmprog="${RMPROG-rm}"
        !            42: mkdirprog="${MKDIRPROG-mkdir}"
        !            43: 
        !            44: transformbasename=""
        !            45: transform_arg=""
        !            46: instcmd="$mvprog"
        !            47: chmodcmd="$chmodprog 0755"
        !            48: chowncmd=""
        !            49: chgrpcmd=""
        !            50: stripcmd=""
        !            51: rmcmd="$rmprog -f"
        !            52: mvcmd="$mvprog"
        !            53: src=""
        !            54: dst=""
        !            55: dir_arg=""
        !            56: 
        !            57: while [ x"$1" != x ]; do
        !            58:     case $1 in
        !            59:        -c) instcmd=$cpprog
        !            60:            shift
        !            61:            continue;;
        !            62: 
        !            63:        -d) dir_arg=true
        !            64:            shift
        !            65:            continue;;
        !            66: 
        !            67:        -m) chmodcmd="$chmodprog $2"
        !            68:            shift
        !            69:            shift
        !            70:            continue;;
        !            71: 
        !            72:        -o) chowncmd="$chownprog $2"
        !            73:            shift
        !            74:            shift
        !            75:            continue;;
        !            76: 
        !            77:        -g) chgrpcmd="$chgrpprog $2"
        !            78:            shift
        !            79:            shift
        !            80:            continue;;
        !            81: 
        !            82:        -s) stripcmd=$stripprog
        !            83:            shift
        !            84:            continue;;
        !            85: 
        !            86:        -t=*) transformarg=`echo $1 | sed 's/-t=//'`
        !            87:            shift
        !            88:            continue;;
        !            89: 
        !            90:        -b=*) transformbasename=`echo $1 | sed 's/-b=//'`
        !            91:            shift
        !            92:            continue;;
        !            93: 
        !            94:        *)  if [ x"$src" = x ]
        !            95:            then
        !            96:                src=$1
        !            97:            else
        !            98:                # this colon is to work around a 386BSD /bin/sh bug
        !            99:                :
        !           100:                dst=$1
        !           101:            fi
        !           102:            shift
        !           103:            continue;;
        !           104:     esac
        !           105: done
        !           106: 
        !           107: if [ x"$src" = x ]
        !           108: then
        !           109:        echo "$0: no input file specified" >&2
        !           110:        exit 1
        !           111: else
        !           112:        :
        !           113: fi
        !           114: 
        !           115: if [ x"$dir_arg" != x ]; then
        !           116:        dst=$src
        !           117:        src=""
        !           118: 
        !           119:        if [ -d "$dst" ]; then
        !           120:                instcmd=:
        !           121:                chmodcmd=""
        !           122:        else
        !           123:                instcmd=$mkdirprog
        !           124:        fi
        !           125: else
        !           126: 
        !           127: # Waiting for this to be detected by the "$instcmd $src $dsttmp" command
        !           128: # might cause directories to be created, which would be especially bad
        !           129: # if $src (and thus $dsttmp) contains '*'.
        !           130: 
        !           131:        if [ -f "$src" ] || [ -d "$src" ]
        !           132:        then
        !           133:                :
        !           134:        else
        !           135:                echo "$0: $src does not exist" >&2
        !           136:                exit 1
        !           137:        fi
        !           138: 
        !           139:        if [ x"$dst" = x ]
        !           140:        then
        !           141:                echo "$0: no destination specified" >&2
        !           142:                exit 1
        !           143:        else
        !           144:                :
        !           145:        fi
        !           146: 
        !           147: # If destination is a directory, append the input filename; if your system
        !           148: # does not like double slashes in filenames, you may need to add some logic
        !           149: 
        !           150:        if [ -d "$dst" ]
        !           151:        then
        !           152:                dst=$dst/`basename "$src"`
        !           153:        else
        !           154:                :
        !           155:        fi
        !           156: fi
        !           157: 
        !           158: ## this sed command emulates the dirname command
        !           159: dstdir=`echo "$dst" | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
        !           160: 
        !           161: # Make sure that the destination directory exists.
        !           162: #  this part is taken from Noah Friedman's mkinstalldirs script
        !           163: 
        !           164: # Skip lots of stat calls in the usual case.
        !           165: if [ ! -d "$dstdir" ]; then
        !           166: defaultIFS='
        !           167:        '
        !           168: IFS="${IFS-$defaultIFS}"
        !           169: 
        !           170: oIFS=$IFS
        !           171: # Some sh's can't handle IFS=/ for some reason.
        !           172: IFS='%'
        !           173: set - `echo "$dstdir" | sed -e 's@/@%@g' -e 's@^%@/@'`
        !           174: IFS=$oIFS
        !           175: 
        !           176: pathcomp=''
        !           177: 
        !           178: while [ $# -ne 0 ] ; do
        !           179:        pathcomp=$pathcomp$1
        !           180:        shift
        !           181: 
        !           182:        if [ ! -d "$pathcomp" ] ;
        !           183:         then
        !           184:                $mkdirprog "$pathcomp"
        !           185:        else
        !           186:                :
        !           187:        fi
        !           188: 
        !           189:        pathcomp=$pathcomp/
        !           190: done
        !           191: fi
        !           192: 
        !           193: if [ x"$dir_arg" != x ]
        !           194: then
        !           195:        $doit $instcmd "$dst" &&
        !           196: 
        !           197:        if [ x"$chowncmd" != x ]; then $doit $chowncmd "$dst"; else : ; fi &&
        !           198:        if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd "$dst"; else : ; fi &&
        !           199:        if [ x"$stripcmd" != x ]; then $doit $stripcmd "$dst"; else : ; fi &&
        !           200:        if [ x"$chmodcmd" != x ]; then $doit $chmodcmd "$dst"; else : ; fi
        !           201: else
        !           202: 
        !           203: # If we're going to rename the final executable, determine the name now.
        !           204: 
        !           205:        if [ x"$transformarg" = x ]
        !           206:        then
        !           207:                dstfile=`basename "$dst"`
        !           208:        else
        !           209:                dstfile=`basename "$dst" $transformbasename |
        !           210:                        sed $transformarg`$transformbasename
        !           211:        fi
        !           212: 
        !           213: # don't allow the sed command to completely eliminate the filename
        !           214: 
        !           215:        if [ x"$dstfile" = x ]
        !           216:        then
        !           217:                dstfile=`basename "$dst"`
        !           218:        else
        !           219:                :
        !           220:        fi
        !           221: 
        !           222: # Make a couple of temp file names in the proper directory.
        !           223: 
        !           224:        dsttmp=$dstdir/#inst.$$#
        !           225:        rmtmp=$dstdir/#rm.$$#
        !           226: 
        !           227: # Trap to clean up temp files at exit.
        !           228: 
        !           229:        trap 'status=$?; rm -f "$dsttmp" "$rmtmp" && exit $status' 0
        !           230:        trap '(exit $?); exit' 1 2 13 15
        !           231: 
        !           232: # Move or copy the file name to the temp name
        !           233: 
        !           234:        $doit $instcmd "$src" "$dsttmp" &&
        !           235: 
        !           236: # and set any options; do chmod last to preserve setuid bits
        !           237: 
        !           238: # If any of these fail, we abort the whole thing.  If we want to
        !           239: # ignore errors from any of these, just make sure not to ignore
        !           240: # errors from the above "$doit $instcmd $src $dsttmp" command.
        !           241: 
        !           242:        if [ x"$chowncmd" != x ]; then $doit $chowncmd "$dsttmp"; else :;fi &&
        !           243:        if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd "$dsttmp"; else :;fi &&
        !           244:        if [ x"$stripcmd" != x ]; then $doit $stripcmd "$dsttmp"; else :;fi &&
        !           245:        if [ x"$chmodcmd" != x ]; then $doit $chmodcmd "$dsttmp"; else :;fi &&
        !           246: 
        !           247: # Now remove or move aside any old file at destination location.  We try this
        !           248: # two ways since rm can't unlink itself on some systems and the destination
        !           249: # file might be busy for other reasons.  In this case, the final cleanup
        !           250: # might fail but the new file should still install successfully.
        !           251: 
        !           252: {
        !           253:        if [ -f "$dstdir/$dstfile" ]
        !           254:        then
        !           255:                $doit $rmcmd -f "$dstdir/$dstfile" 2>/dev/null ||
        !           256:                $doit $mvcmd -f "$dstdir/$dstfile" "$rmtmp" 2>/dev/null ||
        !           257:                {
        !           258:                  echo "$0: cannot unlink or rename $dstdir/$dstfile" >&2
        !           259:                  (exit 1); exit
        !           260:                }
        !           261:        else
        !           262:                :
        !           263:        fi
        !           264: } &&
        !           265: 
        !           266: # Now rename the file to the real destination.
        !           267: 
        !           268:        $doit $mvcmd "$dsttmp" "$dstdir/$dstfile"
        !           269: 
        !           270: fi &&
        !           271: 
        !           272: # The final little trick to "correctly" pass the exit status to the exit trap.
        !           273: 
        !           274: {
        !           275:        (exit 0); exit
        !           276: }

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