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#!/bin/sh
set -e
ROOTDIR=$(dirname $(readlink -f $0))/..
# busybox grep does not know about --text
if grep --help 2>/dev/null | grep -q -- --text; then
GREP="grep --text"
else
GREP=grep
fi
# split preload code into internal logic and libc wrappers
CODE_INT=`grep -B 100000 'Overridden libc' $ROOTDIR/src/libumockdev-preload.c`
CODE_WRAPPERS=`grep -A 100000 'Overridden libc' $ROOTDIR/src/libumockdev-preload.c`
LIBC_OVERRIDES=`echo "$CODE_WRAPPERS" | $GREP '^[a-z_]\+(' | grep -v '^WRAP_' | cut -f1 -d'('`
RET=0
check_empty() {
[ -z "$1" ] || {
echo "* $2:" >&2
echo "---------" >&2
echo "$R" >&2
echo "---------" >&2
echo >&2
RET=1
}
}
# internal code must not have any exported (non-static) functions
R=$(echo "$CODE_INT" | $GREP -B1 '^[a-z_]\+(' | awk 'BEGIN { RS="--\n" } !/static/ { print $0 }')
check_empty "$R" "preload internal code part has exported function(s)"
# wrappers must be exported
R=$(echo "$CODE_WRAPPERS" | $GREP -B1 '^[a-z_]\+(' | awk 'BEGIN { RS="--\n" } /static/ { print $0 }')
check_empty "$R" "preload libc wrapped code part has non-exported function(s)"
# wrappers must not have a '_' in the name, libc doesn't use that style
R=$(echo "$LIBC_OVERRIDES" | grep _ | grep -Ev 'inotify_add_watch|__getcwd_chk' || true)
check_empty "$R" "preload libc wrapped code part exports function with '_'"
# must not use wrapped functions in internal logic
for fn in $LIBC_OVERRIDES; do
R=$(echo "$CODE_INT" | $GREP -w $fn | $GREP -Ev "(/\*|\"|libc_func|#include|^ \* ).*$fn" || true)
check_empty "$R" "preload internal code part must not use overridden libc function $fn"
done
exit $RET
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