rpm-build/scripts/verify-elf.in

#!/bin/sh -ef
#
# verify-elf - verify ELF objects.
#
# $Id$
# Copyright (C) 2002, 2003, 2004, 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
ValidateBuildRoot

: ${RPM_VERIFY_ELF_SKIPLIST:=}

elf_ldd='@RPMCONFIGDIR@/ldd'

rc=0
for f in "$@"; do
	if [ ! -f "$f" ]; then
		Info "$f: file unavailable"
		rc=1
		continue
	fi

	fname="${f#$RPM_BUILD_ROOT}"
	fname="${fname#.}"

	if [ -n "$RPM_VERIFY_ELF_SKIPLIST" ]; then
		for skip in $RPM_VERIFY_ELF_SKIPLIST; do
			if [ -z "${fname##$skip}" ]; then
				continue 2
			fi
		done
	fi

	t="$(file -b "$f")"
	[ -z "${t##ELF *}" -o -z "${t##* ELF *}" ] || continue

	info=$(objdump -p "$f") || continue

	if [ -n "$VERIFY_ELF_FHS" ]; then
		if [ -z "${fname#/usr/share/*}" -o -z "${fname#/etc/*}" ]; then
			Info "$f: ELF object out of allowed directory tree"
			[ "$VERIFY_ELF_FHS" = relaxed ] || rc=1
		fi
	fi

	if [ -n "$VERIFY_ELF_RPATH" ]; then
		rpath=`printf %s "$info" |awk '{if ($1=="RPATH") print $2}'`
		while [ -n "$rpath" ]; do
			found=
			for p in $RPM_BUILD_ROOT $RPM_BUILD_DIR $RPM_SOURCE_DIR; do
				if printf %s "$rpath" |fgrep -qs "$p"; then
					Info "$f: RPATH entry contains \"$p\": $rpath"
					found=1
				fi
			done
			if [ -n "$found" ]; then
				rc=1
				break
			fi

			if printf %s "$rpath" |fgrep -qs :; then
				Info "$f: RPATH entry contains \":\": $rpath"
				[ "$VERIFY_ELF_RPATH" = relaxed ] || rc=1
				break
			fi

			if [ "$VERIFY_ELF_RPATH" = relaxed -o "$VERIFY_ELF_RPATH" = normal ]; then
				break
			fi

			Info "$f: RPATH entry found: $rpath"
			rc=1
			break
		done
	fi

	if [ -n "$VERIFY_ELF_TEXTREL" ]; then
		textrel=`printf %s "$info" |awk '{if ($1=="TEXTREL") print $2}'`
		while [ -n "$textrel" ]; do
			Info "$f: TEXTREL entry found: $textrel"
			[ "$VERIFY_ELF_TEXTREL" != relaxed ] || break
			rc=1
			break
		done
	fi

	if [ -n "$VERIFY_ELF_UNRESOLVED" ]; then
		while [ -z "${t##*ELF* executable*dynamically linked*}" -o -z "${t##*ELF* shared object*}" ]; do
			rpath="$(printf %s "$dump" |awk '{if ($1=="RPATH") print $2}' |tr -s : ' ' |sed -e "s|\$ORIGIN|${fname%/*}|g")"
			if [ -n "$rpath" ]; then
				rpath="$rpath $RPM_VERIFY_ELF_LDD_RPATH"
			else
				rpath="$RPM_VERIFY_ELF_LDD_RPATH"
			fi
			rpath="$(printf %s "$rpath" |
				tr -s '[:space:]' '\n' |
				grep -v '^$' |
				LANG=C uniq |
				sed -e "s|^|$RPM_BUILD_ROOT&|" |
				tr -s '[:space:]' : |
				sed -e 's/^:\+//; s/:\+$//')"

			if ! ldd_info="$("$elf_ldd" --undefined -- "$f" "$RPM_VERIFY_ELF_LDD_RPATH" 2>&1)"; then
				printf >&2 '%s\n' "$ldd_info"
				rc=1
				break
			fi
			[ "$VERIFY_ELF_UNRESOLVED" = relaxed ] && ldd_rc=0 || ldd_rc=1
			printf '%s\n' "$ldd_info" |
				awk -vrc="$ldd_rc" -vprog="$PROG" -vfname="$f" -- '
BEGIN {
        if (rc == "0")
                prefix="WARNING"
        else
                prefix="ERROR"
        errors=0
}
$2 == "=>" && $3 == "not" && $4 == "found" {
        lib=$1
        printf ("%s: %s: %s: not found: %s\n", prog, prefix, fname, lib)
        errors=1
}
$1 == "undefined" && $2 == "symbol:" {
        sym=$3
        lib=$4
        sub("^[(]", "", lib)
        sub("[)]$", "", lib)
        if (lib == fname) {
                printf ("%s: %s: %s: undefined symbol: %s\n", prog, prefix, fname, sym)
                errors=1
        }
}
END {
        if (rc != "0" && errors != 0)
                exit 1
}
				' && ldd_rc=0 || ldd_rc=1
			[ "$VERIFY_ELF_UNRESOLVED" = relaxed -o "$ldd_rc" = 0 ] || rc=1
			break
		done
	fi
	
done

exit $rc