Annotation of gpl/axl/install-sh, revision 1.1

1.1     ! misho       1: #!/bin/sh
        !             2: # install - install a program, script, or datafile
        !             3: 
        !             4: scriptversion=2005-05-14.22
        !             5: 
        !             6: # This originates from X11R5 (mit/util/scripts/install.sh), which was
        !             7: # later released in X11R6 (xc/config/util/install.sh) with the
        !             8: # following copyright and license.
        !             9: #
        !            10: # Copyright (C) 1994 X Consortium
        !            11: #
        !            12: # Permission is hereby granted, free of charge, to any person obtaining a copy
        !            13: # of this software and associated documentation files (the "Software"), to
        !            14: # deal in the Software without restriction, including without limitation the
        !            15: # rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
        !            16: # sell copies of the Software, and to permit persons to whom the Software is
        !            17: # furnished to do so, subject to the following conditions:
        !            18: #
        !            19: # The above copyright notice and this permission notice shall be included in
        !            20: # all copies or substantial portions of the Software.
        !            21: #
        !            22: # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        !            23: # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        !            24: # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
        !            25: # X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
        !            26: # AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNEC-
        !            27: # TION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
        !            28: #
        !            29: # Except as contained in this notice, the name of the X Consortium shall not
        !            30: # be used in advertising or otherwise to promote the sale, use or other deal-
        !            31: # ings in this Software without prior written authorization from the X Consor-
        !            32: # tium.
        !            33: #
        !            34: #
        !            35: # FSF changes to this file are in the public domain.
        !            36: #
        !            37: # Calling this script install-sh is preferred over install.sh, to prevent
        !            38: # `make' implicit rules from creating a file called install from it
        !            39: # when there is no Makefile.
        !            40: #
        !            41: # This script is compatible with the BSD install script, but was written
        !            42: # from scratch.  It can only install one file at a time, a restriction
        !            43: # shared with many OS's install programs.
        !            44: 
        !            45: # set DOITPROG to echo to test this script
        !            46: 
        !            47: # Don't use :- since 4.3BSD and earlier shells don't like it.
        !            48: doit="${DOITPROG-}"
        !            49: 
        !            50: # put in absolute paths if you don't have them in your path; or use env. vars.
        !            51: 
        !            52: mvprog="${MVPROG-mv}"
        !            53: cpprog="${CPPROG-cp}"
        !            54: chmodprog="${CHMODPROG-chmod}"
        !            55: chownprog="${CHOWNPROG-chown}"
        !            56: chgrpprog="${CHGRPPROG-chgrp}"
        !            57: stripprog="${STRIPPROG-strip}"
        !            58: rmprog="${RMPROG-rm}"
        !            59: mkdirprog="${MKDIRPROG-mkdir}"
        !            60: 
        !            61: chmodcmd="$chmodprog 0755"
        !            62: chowncmd=
        !            63: chgrpcmd=
        !            64: stripcmd=
        !            65: rmcmd="$rmprog -f"
        !            66: mvcmd="$mvprog"
        !            67: src=
        !            68: dst=
        !            69: dir_arg=
        !            70: dstarg=
        !            71: no_target_directory=
        !            72: 
        !            73: usage="Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
        !            74:    or: $0 [OPTION]... SRCFILES... DIRECTORY
        !            75:    or: $0 [OPTION]... -t DIRECTORY SRCFILES...
        !            76:    or: $0 [OPTION]... -d DIRECTORIES...
        !            77: 
        !            78: In the 1st form, copy SRCFILE to DSTFILE.
        !            79: In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
        !            80: In the 4th, create DIRECTORIES.
        !            81: 
        !            82: Options:
        !            83: -c         (ignored)
        !            84: -d         create directories instead of installing files.
        !            85: -g GROUP   $chgrpprog installed files to GROUP.
        !            86: -m MODE    $chmodprog installed files to MODE.
        !            87: -o USER    $chownprog installed files to USER.
        !            88: -s         $stripprog installed files.
        !            89: -t DIRECTORY  install into DIRECTORY.
        !            90: -T         report an error if DSTFILE is a directory.
        !            91: --help     display this help and exit.
        !            92: --version  display version info and exit.
        !            93: 
        !            94: Environment variables override the default commands:
        !            95:   CHGRPPROG CHMODPROG CHOWNPROG CPPROG MKDIRPROG MVPROG RMPROG STRIPPROG
        !            96: "
        !            97: 
        !            98: while test -n "$1"; do
        !            99:   case $1 in
        !           100:     -c) shift
        !           101:         continue;;
        !           102: 
        !           103:     -d) dir_arg=true
        !           104:         shift
        !           105:         continue;;
        !           106: 
        !           107:     -g) chgrpcmd="$chgrpprog $2"
        !           108:         shift
        !           109:         shift
        !           110:         continue;;
        !           111: 
        !           112:     --help) echo "$usage"; exit $?;;
        !           113: 
        !           114:     -m) chmodcmd="$chmodprog $2"
        !           115:         shift
        !           116:         shift
        !           117:         continue;;
        !           118: 
        !           119:     -o) chowncmd="$chownprog $2"
        !           120:         shift
        !           121:         shift
        !           122:         continue;;
        !           123: 
        !           124:     -s) stripcmd=$stripprog
        !           125:         shift
        !           126:         continue;;
        !           127: 
        !           128:     -t) dstarg=$2
        !           129:        shift
        !           130:        shift
        !           131:        continue;;
        !           132: 
        !           133:     -T) no_target_directory=true
        !           134:        shift
        !           135:        continue;;
        !           136: 
        !           137:     --version) echo "$0 $scriptversion"; exit $?;;
        !           138: 
        !           139:     *)  # When -d is used, all remaining arguments are directories to create.
        !           140:        # When -t is used, the destination is already specified.
        !           141:        test -n "$dir_arg$dstarg" && break
        !           142:         # Otherwise, the last argument is the destination.  Remove it from $@.
        !           143:        for arg
        !           144:        do
        !           145:           if test -n "$dstarg"; then
        !           146:            # $@ is not empty: it contains at least $arg.
        !           147:            set fnord "$@" "$dstarg"
        !           148:            shift # fnord
        !           149:          fi
        !           150:          shift # arg
        !           151:          dstarg=$arg
        !           152:        done
        !           153:        break;;
        !           154:   esac
        !           155: done
        !           156: 
        !           157: if test -z "$1"; then
        !           158:   if test -z "$dir_arg"; then
        !           159:     echo "$0: no input file specified." >&2
        !           160:     exit 1
        !           161:   fi
        !           162:   # It's OK to call `install-sh -d' without argument.
        !           163:   # This can happen when creating conditional directories.
        !           164:   exit 0
        !           165: fi
        !           166: 
        !           167: for src
        !           168: do
        !           169:   # Protect names starting with `-'.
        !           170:   case $src in
        !           171:     -*) src=./$src ;;
        !           172:   esac
        !           173: 
        !           174:   if test -n "$dir_arg"; then
        !           175:     dst=$src
        !           176:     src=
        !           177: 
        !           178:     if test -d "$dst"; then
        !           179:       mkdircmd=:
        !           180:       chmodcmd=
        !           181:     else
        !           182:       mkdircmd=$mkdirprog
        !           183:     fi
        !           184:   else
        !           185:     # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
        !           186:     # might cause directories to be created, which would be especially bad
        !           187:     # if $src (and thus $dsttmp) contains '*'.
        !           188:     if test ! -f "$src" && test ! -d "$src"; then
        !           189:       echo "$0: $src does not exist." >&2
        !           190:       exit 1
        !           191:     fi
        !           192: 
        !           193:     if test -z "$dstarg"; then
        !           194:       echo "$0: no destination specified." >&2
        !           195:       exit 1
        !           196:     fi
        !           197: 
        !           198:     dst=$dstarg
        !           199:     # Protect names starting with `-'.
        !           200:     case $dst in
        !           201:       -*) dst=./$dst ;;
        !           202:     esac
        !           203: 
        !           204:     # If destination is a directory, append the input filename; won't work
        !           205:     # if double slashes aren't ignored.
        !           206:     if test -d "$dst"; then
        !           207:       if test -n "$no_target_directory"; then
        !           208:        echo "$0: $dstarg: Is a directory" >&2
        !           209:        exit 1
        !           210:       fi
        !           211:       dst=$dst/`basename "$src"`
        !           212:     fi
        !           213:   fi
        !           214: 
        !           215:   # This sed command emulates the dirname command.
        !           216:   dstdir=`echo "$dst" | sed -e 's,/*$,,;s,[^/]*$,,;s,/*$,,;s,^$,.,'`
        !           217: 
        !           218:   # Make sure that the destination directory exists.
        !           219: 
        !           220:   # Skip lots of stat calls in the usual case.
        !           221:   if test ! -d "$dstdir"; then
        !           222:     defaultIFS='
        !           223:         '
        !           224:     IFS="${IFS-$defaultIFS}"
        !           225: 
        !           226:     oIFS=$IFS
        !           227:     # Some sh's can't handle IFS=/ for some reason.
        !           228:     IFS='%'
        !           229:     set x `echo "$dstdir" | sed -e 's@/@%@g' -e 's@^%@/@'`
        !           230:     shift
        !           231:     IFS=$oIFS
        !           232: 
        !           233:     pathcomp=
        !           234: 
        !           235:     while test $# -ne 0 ; do
        !           236:       pathcomp=$pathcomp$1
        !           237:       shift
        !           238:       if test ! -d "$pathcomp"; then
        !           239:         $mkdirprog "$pathcomp"
        !           240:        # mkdir can fail with a `File exist' error in case several
        !           241:        # install-sh are creating the directory concurrently.  This
        !           242:        # is OK.
        !           243:        test -d "$pathcomp" || exit
        !           244:       fi
        !           245:       pathcomp=$pathcomp/
        !           246:     done
        !           247:   fi
        !           248: 
        !           249:   if test -n "$dir_arg"; then
        !           250:     $doit $mkdircmd "$dst" \
        !           251:       && { test -z "$chowncmd" || $doit $chowncmd "$dst"; } \
        !           252:       && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dst"; } \
        !           253:       && { test -z "$stripcmd" || $doit $stripcmd "$dst"; } \
        !           254:       && { test -z "$chmodcmd" || $doit $chmodcmd "$dst"; }
        !           255: 
        !           256:   else
        !           257:     dstfile=`basename "$dst"`
        !           258: 
        !           259:     # Make a couple of temp file names in the proper directory.
        !           260:     dsttmp=$dstdir/_inst.$$_
        !           261:     rmtmp=$dstdir/_rm.$$_
        !           262: 
        !           263:     # Trap to clean up those temp files at exit.
        !           264:     trap 'ret=$?; rm -f "$dsttmp" "$rmtmp" && exit $ret' 0
        !           265:     trap '(exit $?); exit' 1 2 13 15
        !           266: 
        !           267:     # Copy the file name to the temp name.
        !           268:     $doit $cpprog "$src" "$dsttmp" &&
        !           269: 
        !           270:     # and set any options; do chmod last to preserve setuid bits.
        !           271:     #
        !           272:     # If any of these fail, we abort the whole thing.  If we want to
        !           273:     # ignore errors from any of these, just make sure not to ignore
        !           274:     # errors from the above "$doit $cpprog $src $dsttmp" command.
        !           275:     #
        !           276:     { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } \
        !           277:       && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } \
        !           278:       && { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } \
        !           279:       && { test -z "$chmodcmd" || $doit $chmodcmd "$dsttmp"; } &&
        !           280: 
        !           281:     # Now rename the file to the real destination.
        !           282:     { $doit $mvcmd -f "$dsttmp" "$dstdir/$dstfile" 2>/dev/null \
        !           283:       || {
        !           284:           # The rename failed, perhaps because mv can't rename something else
        !           285:           # to itself, or perhaps because mv is so ancient that it does not
        !           286:           # support -f.
        !           287: 
        !           288:           # Now remove or move aside any old file at destination location.
        !           289:           # We try this two ways since rm can't unlink itself on some
        !           290:           # systems and the destination file might be busy for other
        !           291:           # reasons.  In this case, the final cleanup might fail but the new
        !           292:           # file should still install successfully.
        !           293:           {
        !           294:             if test -f "$dstdir/$dstfile"; then
        !           295:               $doit $rmcmd -f "$dstdir/$dstfile" 2>/dev/null \
        !           296:               || $doit $mvcmd -f "$dstdir/$dstfile" "$rmtmp" 2>/dev/null \
        !           297:               || {
        !           298:                 echo "$0: cannot unlink or rename $dstdir/$dstfile" >&2
        !           299:                 (exit 1); exit 1
        !           300:               }
        !           301:             else
        !           302:               :
        !           303:             fi
        !           304:           } &&
        !           305: 
        !           306:           # Now rename the file to the real destination.
        !           307:           $doit $mvcmd "$dsttmp" "$dstdir/$dstfile"
        !           308:         }
        !           309:     }
        !           310:   fi || { (exit 1); exit 1; }
        !           311: done
        !           312: 
        !           313: # The final little trick to "correctly" pass the exit status to the exit trap.
        !           314: {
        !           315:   (exit 0); exit 0
        !           316: }
        !           317: 
        !           318: # Local variables:
        !           319: # eval: (add-hook 'write-file-hooks 'time-stamp)
        !           320: # time-stamp-start: "scriptversion="
        !           321: # time-stamp-format: "%:y-%02m-%02d.%02H"
        !           322: # time-stamp-end: "$"
        !           323: # End:

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