#!/bin/sh -efu
#
# Copyright (C) 2000-2006  Dmitry V. Levin <ldv@altlinux.org>
#
# 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#

. @RPMCONFIGDIR@/functions

dump_ld_config='@RPMCONFIGDIR@/dump_ld_config'

[ -n "${RPM_LIBDIR-}" ] || RPM_LIBDIR=`rpm --eval %_libdir`
[ -n "${RPM_LIB-}" ] || RPM_LIB=`rpm --eval %_lib`

DEF_RPM_FINDPROV_LIB_PATH="/$RPM_LIB $RPM_LIBDIR $("$dump_ld_config")"
[ -z "${RPM_BUILD_ROOT-}" ] ||
DEF_RPM_FINDPROV_LIB_PATH="$("$dump_ld_config" '' "$RPM_BUILD_ROOT") $DEF_RPM_FINDPROV_LIB_PATH"
DEF_RPM_FINDPROV_LIB_PATH="$(IFS="$IFS:"; echo '' $DEF_RPM_FINDPROV_LIB_PATH '')"
Debug "DEF_RPM_FINDPROV_LIB_PATH=$DEF_RPM_FINDPROV_LIB_PATH"

RPM_FINDPROV_LIB_PATH="$(IFS="$IFS:"; echo '' ${RPM_FINDPROV_LIB_PATH-} $DEF_RPM_FINDPROV_LIB_PATH '')"
Debug "RPM_FINDPROV_LIB_PATH=$RPM_FINDPROV_LIB_PATH"

# Normalize buildroot.
[ -z "${RPM_BUILD_ROOT-}" ] && real_buildroot= ||
real_buildroot="$(cd "$RPM_BUILD_ROOT" && /bin/pwd)" || exit 1

# Note this works for both a.out and ELF executables.
FindLibProvs()
{
	local braces dir dump f name suffix
	f="$1"
	local fname="${f#${RPM_BUILD_ROOT-}}"
	dir="${fname%/*}"
	[ -n "$dir" ] || return 0
	name="${fname##*/}"
	[ -n "$name" ] || return 0

	[ "$dir" = "/$RPM_LIB/security" ] || [ -z "${RPM_FINDPROV_LIB_PATH##* $dir *}" ] || return 0

	if dump="$(objdump -p "$f")"; then
		if [ "$dir" = "/$RPM_LIB/security" ]; then
			printf 'PAM(%s)\n' "$name"
			return 0
		fi
		local soname
		soname="$(printf %s\\n "$dump" |sed -ne 's/^[[:space:]]*SONAME[[:space:]]\+\([^[:space:]]\+\)[[:space:]]*$/\1/p')" || return 1
		suffix="$(printf %s\\n "$dump" |sed -ne 's/^.*file format \(elf64\).*$/(64bit)/p')" || return 1
		[ -z "$suffix" ] && braces= || braces='()'
		while :; do
			# For libraries with soname, ignore all but files named as soname.
			[ -z "$soname" -o "$soname" = "$name" ] || break

			# Treat symlinks specially.
			if [ -L "$f" ]; then
				[ -n "$soname" ] || break
				local real realpath realdir
				realpath=$(readlink -fv "$f") || break
				real="${realpath#$real_buildroot}"
				# Ignore symlinks leading out of buildroot.
				[ -z "$real_buildroot" ] || [ "$real" != "$realpath" ] || break
				realdir="${real%/*}"
				# Ignore symlinks to shorter locations.
				[ "${#dir}" -le "${#realdir}" ] || break
			fi

			# soname is either empty or equal to name
			soname="$name"

			# Check for non-default path.
			local nondefdir=
			[ -z "${DEF_RPM_FINDPROV_LIB_PATH##* $dir *}" ] || nondefdir="$dir"

			# Output soname.
			if [ -z "$nondefdir" ]; then
				printf '%s\n' "$soname$braces$suffix"
			else
				printf '%s/%s\n' "$nondefdir" "$soname$braces$suffix"
			fi

			# Output version definitions.
			printf %s\\n "$dump" | awk "-vsoname=$soname" "-vnondefdir=$nondefdir" "-vsuffix=$suffix" '
				BEGIN {start=0;}
				/^Version definitions:$/ {start=1;}
				/^[0-9]/ && (start==1) && ($4!="") && ($4!=soname) {
					if (nondefdir=="")
						printf("%s(%s)%s\n",soname,$4,suffix)
					else
						printf("%s/%s(%s)%s\n",nondefdir,soname,$4,suffix)
				}
				/^$/ {start=0;}
			' || return 1

			break
		done
	fi
}

ArgvFileAction FindLibProvs "$@"