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DragonFly kernel List (threaded) for 2003-12
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Re: LibC status and others...

From: Jeroen Ruigrok/asmodai <asmodai@xxxxxx>
Date: Thu, 11 Dec 2003 08:01:46 +0100

-On [20031211 00:52], Matthew Dillon (dillon@xxxxxxxxxxxxxxxxxxxx) wrote:
>    What I would do is rename, e.g., getpwnam() to getpwnam_r(), add the
>    required passwd pointer, and use the pointer instead of the static 
>    _pw_passwd.  Then write a new getpwnam() which simply aclls
>    getpwnam_r() using &_pw_passwd for the passwd pointer.

Wish it were that easy.

You need to account for a multiple of things:

- thread-safety
- reentrancy
- (asynchronous) cancellation-safety
- asynchronous signal-safety

POSIX threads defines getpwnam_r() as a function which may be
implemented as a cancellation point.

Jeroen Ruigrok van der Werven <asmodai(at)wxs.nl> / asmodai / kita no mono
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