#!/bin/sh
#
#   Copyright (C) 2021 Free Software Foundation, Inc.
#
# This file 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 3 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; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

#
# CHK_LIBC_OBJ  -- a script to scan the .o's in an output directory,
#	which is one of ../{intel-S2,sparc-S2,intel-Linux,sparc-Linux}
#	
#	usage: cd to the output directory, and invoke ../src/CHK_LIBC_OBJ


check_obj() {
    logF="nm.`basename $1`.log"
    if [ `uname` = 'Linux' ]; then 
        nm $1 | grep -v GLIBC_ > ${logF}
    else
        nm $1 > ${logF}
    fi

    FUNC_LIST="strcpy strlcpy strncpy strcat strlcat strncat strncmp strlen \
               strerror strchr strrchr strpbrk strstr strtok strtok_r \
               printf fprintf sprintf snprintf asprintf  wsprintf \
               vprintf vfprintf vsprintf vsnprintf vasprintf \
               memset memcmp memcpy strtol strtoll strtoul strtoull \
               getcpuid calloc malloc free strdup"
    res=0
    echo " -- Checking Object file '$1' for functions from libc"
    for j in `echo ${FUNC_LIST}` ; do
        grep -w ${j} ${logF} | grep UNDEF> grep.log 2>&1
        if [ $? -eq 0 ]; then
            grep -w ${j} ${logF}
            res=1
        fi
    done
    return ${res}
}

STATUS=0

for i in *.o ; do
    echo ""
    check_obj ${i}
    res=$?
    if [ ${res} -eq 0 ]; then
	echo "Object file ${i} does not reference functions in libc"
    else
	echo "======Object file: ${i} DOES reference functions in libc"
    fi
    if [ ${STATUS} -eq 0 ]; then 
	STATUS=${res}
    fi
done

for i in *.so ; do
    echo ""
    check_obj ${i}
    res=$?
    if [ ${res} -eq 0 ]; then
	echo "Object file ${i} does not reference functions in libc"
    else
	echo "======Object file: ${i} DOES reference functions in libc"
    fi
    if [ ${STATUS} -eq 0 ]; then 
	STATUS=${res}
    fi
done

exit $STATUS