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doc: numeric flags to fs.open

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This has been supperted for long but never tested nor documented.

PR-URL: https://github.com/nodejs/node/pull/3641
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
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Carl Lei 2015-11-03 09:53:59 +08:00 committed by Ben Noordhuis
parent 804cc7670d
commit 615fba3bcf
1 changed files with 5 additions and 0 deletions
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@ -529,6 +529,11 @@ created. On POSIX systems, `path` is considered to exist even if it is a symlink
to a non-existent file. The exclusive flag may or may not work with network file
systems.
`flags` can also be a number as documented by open(2); commonly used constants
are available from `require('constants')`. On Windows, flags are translated to
their equivalent ones where applicable, e.g. `O_WRONLY` to `FILE_GENERIC_WRITE`,
or `O_EXCL|O_CREAT` to `CREATE_NEW`, as accepted by CreateFileW.
On Linux, positional writes don't work when the file is opened in append mode.
The kernel ignores the position argument and always appends the data to
the end of the file.