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Github PR: <a title="xsendfile_len() to exit with error if underlying write fails #567" id="LPlnk245910" href="http://xsendfile_len() to exit with error if underlying write fails #567">
xsendfile_len() to exit with error if underlying write fails #567</a></div>
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Github Issue: <a title="https://github.com/landley/toybox/issues/563" id="LPlnk783571" href="https://github.com/landley/toybox/issues/563">
cp ignores errors during write syscall and exits with success #563</a></div>
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I have noticed that `cp` exits with success even when the underlying `write()` system call fails.</div>
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```</div>
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strace cp another.dat /mnt/vendor/syncboss/cal/</div>
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...</div>
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write(4, "n\r\261\314l\266\361\257\370\335\213T\321\257\370t!\243\343a0\204\202\33={l,\v>+w"..., 4096) = -1 ENOSPC (No space left on device)</div>
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close(3) = 0</div>
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close(4) = 0</div>
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madvise(0x7769610000, 28672, MADV_DONTNEED) = 0</div>
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exit_group(0) = ?</div>
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+++ exited with 0 +++</div>
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```</div>
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Attaching the patch which worked to resolve the issue for me. Looking to get it merged and or suggestions.<br>
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Best,</div>
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Utsav Munendra</div>
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