libc
#!/bin/sh
#$Id$
#Copyright (c) 2016 Pierre Pronchery <khorben@defora.org>
#
#Redistribution and use in source and binary forms, with or without
#modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
#THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
#FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
#DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
#SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
#CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#variables
CONFIGSH="${0%/ldso.sh}/../config.sh"
LDSO=
PREFIX="/usr/local"
[ -f "$CONFIGSH" ] && . "$CONFIGSH"
PROGNAME="ldso.sh"
SYSTEM="$(uname -s)-$(uname -m)"
#executables
DEBUG="_debug"
DEVNULL="/dev/null"
INSTALL="install"
LN="ln -f"
MKDIR="mkdir -m 0755 -p"
RM="rm -f"
#functions
#debug
_debug()
{
echo "$@" 1>&2
"$@"
}
#error
_error()
{
echo "$PROGNAME: $@" 1>&2
return 2
}
#usage
_usage()
{
echo "Usage: $PROGNAME [-c|-i|-u][-P prefix] target" 1>&2
return 1
}
#main
clean=0
install=0
uninstall=0
while getopts "ciuP:" name; do
case $name in
c)
clean=1
;;
i)
uninstall=0
install=1
;;
u)
install=0
uninstall=1
;;
P)
PREFIX="$OPTARG"
;;
?)
_usage
exit $?
;;
esac
done
shift $(($OPTIND - 1))
if [ $# -ne 1 ]; then
_usage
exit $?
fi
#detect ld.so
[ -n "$LDSO" ] || case "$SYSTEM" in
FreeBSD-*)
LDSO="/libexec/ld-elf.so.1"
;;
Linux-armv7l)
LDSO="/lib/ld-linux-armhf.so.3"
;;
Linux-*)
LDSO="/lib/ld-linux-$(uname -m | tr _ -).so.2"
;;
NetBSD-*)
LDSO="/libexec/ld.elf_so"
;;
OpenBSD-*)
LDSO="/usr/libexec/ld.so"
;;
esac
#XXX ignore errors
if [ -z "$LDSO" ]; then
_error "$SYSTEM: No known dynamic linker for this platform"
exit 0
elif [ ! -f "$LDSO" ]; then
_error "$LDSO: Dynamic linker not found"
exit 0
fi
#clean
[ "$clean" -ne 0 ] && exit 0
#do not tamper with the underlying system
[ -z "$DESTDIR" ] && exit 0
#uninstall
if [ "$uninstall" -eq 1 ]; then
$DEBUG $RM -- "$PREFIX/${LDSO##*/}" "$PREFIX/ld.so" || exit 2
exit 0
fi
#install
if [ "$install" -eq 1 ]; then
($DEBUG $MKDIR -- "$PREFIX" &&
$DEBUG $INSTALL -m 0755 "$LDSO" "$PREFIX/${LDSO##*/}") || exit 2
if [ "${LDSO##*/}" != "ld.so" ]; then
$DEBUG $LN -s "${LDSO##*/}" "$PREFIX/ld.so" || exit 2
fi
fi