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authorJohn Crispin <john@openwrt.org>2016-03-03 20:24:38 +0000
committerJohn Crispin <john@openwrt.org>2016-03-03 20:24:38 +0000
commit4a4c324cd22e590990e323ed0ece974c7fa00d22 (patch)
tree2c7b3b08166f2fcc5428220fe6e1c99b550c5070 /target/linux/kirkwood
parent8fb8b78bb214c7714a0c0a610ac86c81a5f5290f (diff)
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mtd: fix reading of image magic bytes in smaller chunks
The image_check currently fails when it cannot read all magic bytes in a single chunk. But this can happen when the data are read from a pipe. This currently breaks the openmesh.sh upgrade script with musl because it uses dd with a blocksize of 1 to copy the image file to the mtd process. The read can simply be repeated until enough bytes are read for the magic byte check. It only stops when either an error was returned or 0 bytes were read. Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com> SVN-Revision: 48891
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