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wget2 | Thread safety issues (#491)

From: Tim Rühsen
Subject: wget2 | Thread safety issues (#491)
Date: Tue, 19 Nov 2019 16:11:21 +0000

Tim Rühsen created an issue: https://gitlab.com/gnuwget/wget2/issues/491

We use several (possible) thread unsafe functions in `libwget/` (nl_langinfo, 
strerror, getenv, getuid). We should move those outside the library, remove or 
replace them appropriately.

Also should we check such usage in `src/` and move them outside the threaded 

`readdir` is thread-safe in glibc (at least in the way we use it).

There is a script attached to check for unsafe functions. For more details: 


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