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Add compatibility function for fgets(3).

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This patch adds the `tor_fgets()` function to our compatibility layer.

`tor_fgets()` adds an additional check for whether the error-bit have
been enabled for the given file stream, if that is the case and `errno`
is set to `EAGAIN` we make sure that we always return NULL.

Unfortunately `fgets(3)` behaves differently on different versions of
the C library.

See: https://bugs.torproject.org/21416
See: https://bugs.torproject.org/20988
This commit is contained in:
Alexander Færøy
2017-02-27 15:37:31 +01:00
parent a0a4f8ae5d
commit 498287b3c3
3 changed files with 45 additions and 0 deletions
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changes/bug20988
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o Minor bugfixes (portability):
- Add Tor compatibility function for fgets(3) due to inconsistency of
returned values in different supported C libraries. This fixes unit test
failures reported on FreeBSD. Fixes bug 20988.