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fs: fix createReadStream(…, {end: n}) for non-seekable fds #19329

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fs: fix createReadStream(…, {end: n}) for non-seekable fds #19329

wants to merge 3 commits into from

Commits on Mar 14, 2018

  1. fs: fix createReadStream(…, {end: n}) for non-seekable fds 

    82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in nodejs#18936 as well.

Fixes: nodejs#19240
Refs: nodejs#18121
    @addaleax
    addaleax committed Mar 14, 2018
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  2. [squash] always skip test part on windows

    @addaleax
    addaleax committed Mar 14, 2018
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  3. [squash] always skip mkfifo on windows

    @addaleax
    addaleax committed Mar 14, 2018
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