Annotation of suX/install-sh, revision 1.1.1.1

1.1       misho       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 "install:  no input file specified"
                    110:        exit 1
                    111: else
                    112:        true
                    113: fi
                    114: 
                    115: if [ x"$dir_arg" != x ]; then
                    116:        dst=$src
                    117:        src=""
                    118:        
                    119:        if [ -d $dst ]; then
                    120:                instcmd=:
                    121:                chmodcmd=""
                    122:        else
                    123:                instcmd=mkdir
                    124:        fi
                    125: else
                    126: 
                    127: # Waiting for this to be detected by the "$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 -o -d $src ]
                    132:        then
                    133:                true
                    134:        else
                    135:                echo "install:  $src does not exist"
                    136:                exit 1
                    137:        fi
                    138:        
                    139:        if [ x"$dst" = x ]
                    140:        then
                    141:                echo "install:  no destination specified"
                    142:                exit 1
                    143:        else
                    144:                true
                    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:                true
                    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:                true
                    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 $dst; else true ; fi &&
                    198:        if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
                    199:        if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
                    200:        if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
                    201: else
                    202: 
                    203: # If we're going to rename the final executable, determine the name now.
                    204: 
                    205:        if [ x"$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 $dst`
                    218:        else
                    219:                true
                    220:        fi
                    221: 
                    222: # Make a temp file name in the proper directory.
                    223: 
                    224:        dsttmp=$dstdir/#inst.$$#
                    225: 
                    226: # Move or copy the file name to the temp name
                    227: 
                    228:        $doit $instcmd $src $dsttmp &&
                    229: 
                    230:        trap "rm -f ${dsttmp}" 0 &&
                    231: 
                    232: # and set any options; do chmod last to preserve setuid bits
                    233: 
                    234: # If any of these fail, we abort the whole thing.  If we want to
                    235: # ignore errors from any of these, just make sure not to ignore
                    236: # errors from the above "$doit $instcmd $src $dsttmp" command.
                    237: 
                    238:        if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
                    239:        if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
                    240:        if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
                    241:        if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
                    242: 
                    243: # Now rename the file to the real destination.
                    244: 
                    245:        $doit $rmcmd -f $dstdir/$dstfile &&
                    246:        $doit $mvcmd $dsttmp $dstdir/$dstfile 
                    247: 
                    248: fi &&
                    249: 
                    250: 
                    251: exit 0

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