libSystem
#!/bin/sh
#$Id$
#Copyright (c) 2015-2020 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="${0%/platform.sh}/../config.sh"
DESTDIR=
LDSOCONF="/etc/ld.so.conf"
PREFIX="/usr/local"
PROGNAME="platform.sh"
SOEXT=
#executables
UNAME="uname"
[ -f "$CONFIGSH" ] && . "$CONFIGSH"
#functions
#platform_library
_platform_library()
{
library="$1"
libdir=$(_platform_variable "LIBDIR")
path="/lib:/usr/lib:$libdir"
if [ -f "$DESTDIR$LDSOCONF" ]; then
paths=$(_library_ldsoconf "$DESTDIR$LDSOCONF")
#XXX breaks on whitespace
for p in $paths; do
path="$path:$p"
done
fi
(IFS=:; for p in $path; do
if [ -f "$DESTDIR$p/lib$library$SOEXT" ]; then
echo "-l$library"
return
fi
done)
}
_library_ldsoconf()
{
ldsoconf="$1"
while read line; do
case "$line" in
"#"*)
;;
"include "*)
#remove trailing comments
line="${line%#*}"
#recurse into the file included
line="${line#include }"
if [ "${line#/}" = "$line" ]; then
files="${ldsoconf%/*}/$line"
else
files="$DESTDIR${line#include }"
fi
#XXX breaks on whitespace
for filename in $files; do
[ -f "$filename" ] &&
_library_ldsoconf "$filename"
done
;;
*)
#remove trailing comments
line="${line%#*}"
echo "$line"
;;
esac
done < "$ldsoconf"
}
#platform_variable
_platform_variable()
{
variable="$1"
case "$variable" in
ARCH)
if [ -n "$ARCH" ]; then
echo "$ARCH"
return 0
fi
ARCH=$($UNAME -m)
case "$ARCH" in
amd64|x86_64)
echo "amd64"
;;
i[3456]86)
echo "i386"
;;
*)
echo "unknown"
;;
esac
;;
BINDIR)
echo "$PREFIX/bin"
;;
DATADIR)
echo "$PREFIX/share"
;;
LIBDIR)
echo "$PREFIX/lib"
;;
MANDIR)
if [ "$PREFIX" = "/usr/pkg" ]; then
echo "$PREFIX/man"
else
echo "$PREFIX/share/man"
fi
;;
PREFIX)
echo "$PREFIX"
;;
SBINDIR)
echo "$PREFIX/sbin"
;;
SOEXT)
case "$($UNAME -s)" in
"Darwin")
echo ".dylib"
;;
"MINGW"*)
echo ".dll"
;;
*)
echo ".so"
;;
esac
;;
SYSCONFDIR)
if [ "$PREFIX" = "/usr" ]; then
echo "/etc"
else
echo "$PREFIX/etc"
fi
;;
esac
}
#usage
_usage()
{
echo "Usage: $PROGNAME -l library" 1>&2
echo " $PROGNAME -V variable" 1>&2
return 1
}
#main
type=
variable=
while getopts "l:O:V:" name; do
case "$name" in
O)
export "${OPTARG%%=*}"="${OPTARG#*=}"
;;
V)
type="variable"
variable="$OPTARG"
;;
l)
type="library"
library="$OPTARG"
;;
?)
_usage
exit $?
;;
esac
done
shift $((OPTIND - 1))
if [ $# -ne 0 ]; then
_usage
exit $?
fi
[ -n "$SOEXT" ] || SOEXT=$(_platform_variable SOEXT)
case "$type" in
library)
"_platform_$type" "$library"
;;
variable)
"_platform_$type" "$variable"
;;
*)
_usage
exit $?
;;
esac