File: install-sh

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#!/bin/sh
#
# Copyright (c) 2013 Red Hat.
# Copyright (c) 2004 Silicon Graphics, Inc.  All Rights Reserved.
# 
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
# 
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
# 
# This script emulates bsd install and also recognises
# two environment variables, with the following semantics :-
#
# $DIST_MANIFEST - if set, the name of the file to append manifest
#                  information in the following format:
#                  File    :  f mode owner group src target
#                  Diretory:  d mode owner group target
#                  Symlink :  l linkval target
#
# $DIST_ROOT     - if set, prepend to target
#
# The sematics of all combinations of these two variables
# are as follows:
#
# $DIST_MANIFEST?  $DIST_ROOT? |   Copy?  Append Manifest?
# -----------------------------+--------------------------
#       not set       not set  |    yes        no
#       not set       set      |    yes        no
#       set           not set  |    no         yes
#       set           set      |    yes        yes

_usage()
{
    echo "Usage: $prog [-o owner] [-g group] [-m mode] -d directory"
    echo "or     $prog [-o owner] [-g group] [-m mode] file directory/file"
    echo "or     $prog [-o owner] [-g group] [-m mode] file file [file ...] directory"
    echo "or     $prog -S file target  (creates \"target\" symlink)"
    echo ""
    echo "The \$DIST_MANIFEST and \$DIST_ROOT environment variables affect the"
    echo "behaviour of this command - see comments in the script."
    echo ""
    exit 1
}

_chown()
{
    _st=255
    if [ $# -eq 3 ] ; then
	chown "$1:$2" "$3"
	_st=$?
	if [ $_st -ne 0 ] ; then
	    if [ $REAL_UID != '0' ] ; then
		if [ ! -f "$DIST_ROOT"/.chown.quiet ] ; then
		    echo '==============================================='
		    echo Ownership of files under ${DIST_ROOT:-/}
		    echo cannot be changed
		    echo '==============================================='
		    if [ -n "$DIST_ROOT" ] ; then
			touch "$DIST_ROOT"/.chown.quiet
		    fi
		fi
	       _st=0
	    fi     
	fi
    fi

    return $_st
}

_ln()
{
    if uname -s | tr 'A-Z' 'a-z' | grep mingw >/dev/null
    then
	/bin/true
    else
	ln -s -f "$1" "$2"
    fi
}

_manifest()
{ 
    echo $* | sed -e 's/\/\//\//g' >>${DIST_MANIFEST:-/dev/null}
}

ID=id
# Test to use the functional id on Solaris
test -f /usr/xpg4/bin/id && ID=/usr/xpg4/bin/id

prog=`basename $0`
HERE=`pwd`
dflag=false
Sflag=false
DIRMODE=755
FILEMODE=644
OWNER=`$ID -u 2>/dev/null`
GROUP=`$ID -g 2>/dev/null`
if [ -z "$OWNER" -o -z "$GROUP" ]
then
    # do it the hardway
    #
    OWNER=`$ID | sed -e 's/.*uid=[^(]*(//' -e 's/).*//'`
    GROUP=`$ID | sed -e 's/.*gid=[^(]*(//' -e 's/).*//'`
fi
REAL_UID=$OWNER

# default is to install and don't append manifest
INSTALL=true
MANIFEST=:

[ -n "$DIST_MANIFEST" -a -z "$DIST_ROOT" ] && INSTALL=false
[ -n "$DIST_MANIFEST" ] && MANIFEST="_manifest"

[ $# -eq 0 ] && _usage

if $INSTALL
then
    RM=rm; CP=cp; LN=_ln; MKDIR=mkdir; CHMOD=chmod; CHOWN=_chown
else
    RM=true; CP=true; LN=true; MKDIR=true; CHMOD=true; CHOWN=true
fi


test $REAL_UID -ne 0 && CHOWN=true
test "$NO_CHOWN" = "true" && CHOWN=true

while getopts "d:g:m:o:S:" c
do
   case $c in
   d) 
	dir=`echo "$DIST_ROOT/$OPTARG" | sed -e 's;//*;/;g'`
	dflag=true
	;;
   g)
	GROUP=$OPTARG
	;;
   m)
	DIRMODE=`expr $OPTARG`
	FILEMODE=$DIRMODE
	;;
   o)
	OWNER=$OPTARG
	;;
   S) 
	symlink=$OPTARG
	Sflag=true
	;;
   *)
   	_usage
	;;
   esac
done

shift `expr $OPTIND - 1`

status=0
if $dflag
then
    #
    # first usage
    #
    $MKDIR -p "$dir"
    status=$?
    if [ $status -eq 0 ]
    then
	$CHMOD $DIRMODE "$dir"
	status=$?
    fi
    if [ $status -eq 0 ]
    then
	$CHOWN $OWNER $GROUP "$dir"
	status=$?
    fi
    $MANIFEST d $DIRMODE $OWNER $GROUP `echo "$dir" | sed -e "s;^$DIST_ROOT;;"`
elif $Sflag
then
    #
    # fourth usage (symlink)
    #
    if [ $# -ne 1 ]
    then
    	_usage
    else
	target=`echo "$DIST_ROOT/$1" | sed -e 's;//*;/;g'`
    fi
    $RM -f "$target"
    dir=`dirname "$target" | sed -e 's;//*;/;g'`
    [ ! -d "$dir" ] && mkdir -p "$dir"
    $LN "$symlink" "$target"
    status=$?
    $MANIFEST l "$symlink" `echo "$target" | sed -e "s;^$DIST_ROOT;;"`
else
    list=""
    dir=""
    if [ $# -eq 2 ]
    then
	#
	# second usage: install file dir/name
	# target 'name' is not necessarily the same as 'file'
	# (Note: install file dir  is ambiguous and not supported
	#
	f="$1"
	dir="$DIST_ROOT"/`dirname "$2"`
	dir=`echo "$dir" | sed -e 's;//*;/;g'`
	t_dir=`echo "$dir" | sed -e "s;^$DIST_ROOT;;" | sed -e 's;//*;/;g'`
	destfile=`basename "$2"`
	if [ -f "$f" -a -f "$f.exe" ]
	then
	    # Windows hack -- executables present as foo and foo.exe,
	    # the foo one is visible to test(1) and ls(1), but not to
	    # cat(1)/cp(1) ... need to $RM/$CP the foo.exe one
	    #
	    if cat "$f" >/dev/null 2>&1
	    then
		:
	    else
		f="$f.exe"
		destfile="$destfile.exe"
	    fi
	fi
	[ ! -d "$dir" ] && mkdir -p "$dir"
	if [ -d "$dir/$destfile" ]
	then
	    echo ERROR: unsupported install usage
	    _usage
	    exit 1
	else
	    $RM -f "$dir/$destfile"
	fi
	$CP "$f" "$dir/$destfile"
	status=$?

	if [ $status -eq 0 ]
	then
	    [ ! -d "$dir/$destfile" ] && $CHMOD $FILEMODE "$dir/$destfile"
	    status=$?
	    if [ $status -eq 0 ]
	    then
		$CHOWN $OWNER $GROUP "$dir/$destfile"
		status=$?
	    fi
	    $MANIFEST f $FILEMODE $OWNER $GROUP "$HERE/$f" "$t_dir/$destfile"
	fi
	[ $status -ne 0 ] && break

    else
	#
	# third usage: install file file [file ...] directory
	#
	n=1
	while [ $# -gt 0 ]
	do
	    if [ $# -gt 1 ]
	    then
		list="$list $1"
	    else
		dir=`echo "$DIST_ROOT/$1" | sed -e 's;//*;/;g'`
	    fi
	    shift
	done

	# At this stage, $list is the list of files to install
	# in $dir. We create $dir if necessary

	# t_dir is for the manifest, i.e. without $DIST_ROOT prefix
	t_dir=`echo "$dir" | sed -e "s;^$DIST_ROOT;;"`

	for f in $list
	do
	    if [ -f "$f" -a -f "$f.exe" ]
	    then
		# Windows hack -- executables present as foo and foo.exe,
		# the foo one is visible to test(1) and ls(1), but not to
		# cat(1)/cp(1) ... need to $RM/$CP the foo.exe one
		#
		if cat "$f" >/dev/null 2>&1
		then
		    :
		else
		    f="$f.exe"
		fi
	    fi

	    [ ! -d "$dir" ] && mkdir -p "$dir"
	    $RM -f "$dir/$f"
	    $CP "$f" "$dir/$f"
	    status=$?

	    if [ $status -eq 0 ]
	    then
		$CHMOD $FILEMODE "$dir/$f"
		status=$?
		if [ $status -eq 0 ]
		then
		    $CHOWN $OWNER $GROUP "$dir/$f"
		    status=$?
		fi
		$MANIFEST f $FILEMODE $OWNER $GROUP "$HERE/$f" "$t_dir/$f"
	    fi
	    [ $status -ne 0 ] && break
	done
    fi
fi

exit $status