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#!/bin/bash
#
# libseccomp syscall build-time checking script
#
# Copyright (c) 2021 Microsoft Corporation. <paulmoore@microsoft.com>
#
# Author: Paul Moore <paul@paul-moore.com>
#
#
# This library is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License as
# published by the Free Software Foundation.
#
# This library 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 Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, see <http://www.gnu.org/licenses>.
#
# Based on an idea from GNU coreutils
abs_topsrcdir="$(unset CDPATH; cd $(dirname $0)/.. && pwd)"
SYSCALL_CSV="$abs_topsrcdir/src/syscalls.csv"
SYSCALL_HDR="$abs_topsrcdir/include/seccomp-syscalls.h"
function check_snr() {
(export LC_ALL=C; diff \
--label "CSV ($SYSCALL_CSV)" --label "HDR ($SYSCALL_HDR)" -u \
<(tail -n+2 $SYSCALL_CSV | cut -d',' -f1 | sort -u) \
<(grep __SNR_ $SYSCALL_HDR | awk '{ print $2 }' | \
sed -e 's/^__SNR_//' | sort -u))
return $?
}
function check_pnr() {
# NOTE: we don't care if we have __PNR_ define that isn't needed, we
# likely want to preserve those values so they aren't mistakenly
# reused by a new __PNR_ in the future
(export LC_ALL=C; diff \
<(tail -n+2 $SYSCALL_CSV | grep "PNR" | cut -d',' -f1 | \
sort -u) \
<(grep "#define __PNR_" $SYSCALL_HDR | awk '{ print $2 }' | \
sed -e 's/^__PNR_//' | sort -u) | \
grep "^<")
[[ $? -eq 1 ]] && return 0 || return 1
}
rc=0
echo ">>> CHECKING FOR MISSING __SNR_syscall VALUES"
check_snr
rc=$(( $rc + $? ))
echo ">>> CHECKING FOR MISSING __PNR_syscall VALUES"
check_pnr
rc=$(( $rc + $? ))
exit $rc
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