[riot-notifications] [RIOT-OS/RIOT] posix_sockets: set read/write permissions for socket fd (#11576)

Martine Lenders notifications at github.com
Fri May 24 16:13:20 CEST 2019


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### Contribution description
In https://github.com/RIOT-OS/RIOT/issues/11212 it was discovered, that the permissions for the file descriptors of POSIX sockets are not set so `write` and `read` can be used. This fixes that.
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### Testing procedure
Flash and run the application provided in #11212 on 2 `samr21-xpro`s. Without this PR `echo send` returns "Bad file descriptor" as its `write()` call ends up here

https://github.com/RIOT-OS/RIOT/blob/f6ee0ace8ed2953f8ba6c13a4858076ffbbe8fc5/sys/vfs/vfs.c#L325-L328
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### Issues/PRs references
Fixes #11212.

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You can view, comment on, or merge this pull request online at:

  https://github.com/RIOT-OS/RIOT/pull/11576

-- Commit Summary --

  * posix_sockets: set read/write permissions for socket fd

-- File Changes --

    M sys/posix/sockets/posix_sockets.c (5)

-- Patch Links --

https://github.com/RIOT-OS/RIOT/pull/11576.patch
https://github.com/RIOT-OS/RIOT/pull/11576.diff

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