Solaris

od -An -w1 -b -v your.binary.file |while read BYTE; do 
   echo "ibase=8;obase=2;$BYTE" |bc
done

od -An -v -t d1 yourbinary |
  while read line ; do
    for byte in $line ; do
      if [ $byte -lt 0 ] ; then byte=$((byte+256)); fi
      printf "%08.8s" $(echo "ibase=10;obase=2;$byte"|bc)
    done
  done

main(){
        int i,j,cc;
        static unsigned char buf[1024];
        static unsigned char bin[256][9];
        for(i=0;i<256;i++) {
                for(j=0;j<8;j++) {
                        bin[i][7-j]=i&(1<<j)?'1':'0';
                }
                bin[i][8]=0;
        }
        while((cc=read(0,buf,1024))>0)
                for(i=0;i<cc;i++)
                        printf("%s",bin[buf[i]]);
        printf("\n");
}