strtonum in OS X, not found

问题

cmp -l "$1" "$2/$1" | awk '{printf "%08X %02X %02X\n", $1, strtonum(0$2), strtonum(0$3)}'

I am using command above to show the binary differences in Ubuntu, from shell script. However, this doesn't work in OS X lion, claiming that strtonum not found. Any idea how to have it in OS X or substitute it with something similar/light?

回答1:

Either MacPorts or Homebrew can be used to install the GNU version of awk which includes strtonum. To avoid conflicts with the system awk, they install the GNU version as gawk.

For example, with the base MacPorts files installed:

sudo port install gawk

回答2:

As it was said there is no strtonum on mac/BSD awk, but if you need to convert hex to dec there is a workaround:

echo 0xff | awk '{print $1+0}'

So just add 0 to hex value and by default awk converts it to decimal value.

来源：https://stackoverflow.com/questions/8199934/strtonum-in-os-x-not-found