I'm trying to write a script which will determine actions based on the architecture of the machine. I already use uname -m to gather the architecture line, however I do not know how many ARM architectures there are, nor do I know whether one is armhf, armel, or arm64.

As this is required for this script to determine whether portions of the script can be run or not, I am trying to find a simple way to determine if the architecture is armhf, armel or arm64. Is there any one-liner or simple command that can be used to output either armhf, armel, or arm64?

The script is specifically written for Debian and Ubuntu systems, and I am tagging as such with this in mind (it quits automatically if you aren't on one of those distros, but this could be applied in a much wider way as well if the command(s) exist)

EDIT: Recently learned that armel is dead, and arm64 software builders (PPA or virtual based) aren't the most stable. So I have a wildcard search finding arm* and assuming armhf, but it's still necessary to figure out a one liner that returns one of the three - whether it's a Ubuntu/Debian command or a kernel call or something.

  • case $(arch) in ; armf)... ;; armel)... ;; arm64)... ;; *) exit ;; esac do you meen something like this? – Costas Jan 23 '15 at 21:26
  • @Costas Yes, that's effectively what i'm after, but getting the arch is the tricky part. Since solutions might be distribution and OS-model specific, Debian and Ubuntu are similar and are my target, so solutions that would get the arch out and then usable would be great. (This isn't a pure-programming question either, I just need the command to grab the specific arch - i already have i386, i686, and x86_64 cases based on uname -m, but nothing for arm??... or at least, nothing that identifies armhf, armel, or arm64). – Thomas Ward Jan 23 '15 at 22:07
  • What do you mean? – Costas Jan 23 '15 at 22:13
  • @Costas On ARM setups, uname -m spits out the specific arm board - armv7l for example. It doesn't explicitly say whether it's armel, armhf, or arm64 - which is what I need $(arch) to end up as in order to weed out incompatible OS architectures with. – Thomas Ward Jan 23 '15 at 22:17
  • You might be better off parsing /proc/config.gz if it is there. – umeboshi Jan 26 '15 at 16:41
dpkg --print-architecture

will output the primary architecture of the machine it's run on. This will be armhf on a machine running 32-bit ARM Debian or Ubuntu (or a derivative), arm64 on a machine running 64-bit ARM.

Note that the running architecture may be different from the hardware architecture or even the kernel architecture. It's possible to run i386 Debian on a 64-bit Intel or AMD CPU, and I believe it's possible to run armhf on a 64-bit ARM CPU. It's even possible to have mostly i386 binaries (so the primary architecture is i386) on an amd64 kernel...

  • Right but this will determine the architecture needed for the script's packages. I will test this today, thanks. – Thomas Ward Jan 28 '15 at 13:08
  • 1
    On a android device, there is no dpkg command. What should I do to detect architecture of a android device? – Dr.jacky Jan 13 '16 at 9:22
  • @Mr.Hyde this question specifically targeted Debian and Ubuntu; I suggest you ask a new question if you want the answer for Android, either here or on android.stackexchange.com. – Stephen Kitt Jan 13 '16 at 9:36

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