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authorKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2019-11-12 14:27:06 +0000
committerKevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>2019-11-12 15:43:14 +0000
commitdfd8c45a98f82c69cad7a622016aa70210b025c5 (patch)
treee01971c0b3a464556a6aefa19fcb0f337445fe63 /package/base-files/files/etc
parent6becc37f33be4c2f2b5d58467bdda41c251d9e2e (diff)
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build: image: posix compatibility cut v head
Replace 2 instances of non posix use of 'head' with posix compliant 'cut'. 'head -c n' cuts 'n' bytes from the passed string and happens to work on Linux & Mac OS X even though '-c' is not posix. 'head --bytes n' does the same thing and happens to work on linux but not on Mac OS X and is also not posix. 'cut -b1-8' cuts the first 8 bytes from the passed string and is posix compliant, hence works on Linux & Mac OS X. Our usage of 'head --bytes' was particularly unfortunate since it was used to calculated the RootFS UUID passed to grub - the net result being a non-functioning system waiting for the root file system to appear. Thanks to karlp, ynezz & others for pointers on solving this. Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
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