expr-big

最新的busybox源码

# busybox expr

# 3*1000*1000*1000 overflows 32-bit signed int
res=`busybox expr 0 '<' 3000000000`
[ x"$res" = x1 ] || exit 1

# 9223372036854775807 = 2^31-1
res=`busybox expr 0 '<' 9223372036854775807`
[ x"$res" = x1 ] || exit 1
# coreutils fails this one!
res=`busybox expr -9223372036854775800 '<' 9223372036854775807`
[ x"$res" = x1 ] || exit 1

# This one works only by chance
# res=`busybox expr 0 '<' 9223372036854775808`
# [ x"$res" = x1 ] || exit 1