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How to make ctrl-c work in `timeout` command work in Makefile?

How to make this interruptable with ctrl-c?

# Makefile
foo:
    timeout 1m bash -c "while true; do date; sleep 1; done"

GNU Make 4.3

Solution

  • You have to run timeout with the --foreground option; see the man page:

       --foreground
          when not running timeout directly from a shell prompt,
          allow COMMAND to read from the TTY and get TTY signals; in  this
          mode, children of COMMAND will not be timed out

    Since you're running timeout from inside a makefile, which is not directly from a shell prompt, you need this to allow it to receive TTY signals (like CTRL-C).