On my OpenWRT shorewall6-lite (4.2.8) machine, observe the following: # /bin/sh -c 'printf "%2d%02d%02d\n" 2 6 30 9' 20630 9sh: : invalid number 00sh: : invalid number 00 # /bin/sh -c 'printf "%2d%02d%02d%02d\n" 2 6 30 9' 2063009
So it looks like printf doesn't like having more digits than format in the busybox bourne shell. I could hack up either of the two solutions available, one being the above or the other being stripping the kernel version down to 3 positions. I'm just not sure which you want long-term. Cheers, b.
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