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Writing sparse to block device generates write failed on "dev": Invalid argument (22) #642

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opoplawski opened this issue Sep 20, 2024 · 0 comments

opoplawski commented Sep 20, 2024

When writing a sparse file to a device, rsync calls ftruncate() on the device file, which is invalid.

# rsync -vSI --write-devices --copy-devices /usr/bin/rsync /dev/null
rsync
rsync: [receiver] write failed on "/dev/null": Invalid argument (22)
rsync error: error in file IO (code 11) at receiver.c(380) [receiver=3.3.0]

strace reveals:

[pid  1870] ftruncate(3, 1048576)       = -1 EINVAL (Invalid argument)

I believe this may be from here: https://github.com/RsyncProject/rsync/blob/master/fileio.c#L43

This is with rsync-3.3.0-4.fc42.x86_64

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