Mail Archives: cygwin/1999/01/21/00:36:46
> -----Message d'origine-----
> De: Tim Taylor [SMTP:ttaylor AT mitre DOT org]
> Date: mardi 19 janvier 1999 18:24
> À: gnu-win32 AT cygnus DOT com
> Objet: setting errno
>
> I'm porting a program that sets errno if an operation fails. However,
> in
> the B20.1 errno is a macro that dereferences the pointer returned by a
> function #define errno (*__errno())
>
> What is the proper way to set errno in cygwin?
>
Do you mean that "errno = Exxx;" fails? Iwould have expected it to work
without any problem; the only problem this causse is that its not
possible to declare a static (or global) variable and initialize it by
"static perrno = &errno;" (but I'm not sure if ANSI C requires this to
work...).
> Based on comments I've read in the headers, it appears that the
> following
> will work:
>
> _REENT->_errno = xxx
>
What's "_REENT"? I don't know, but this seems utterly non-portable...
> Is this correct, or is there a more compatible or preferred way of
> doing this?
>
I would just simply use "errno = xxx;" I'm sure I do this all the time
and I never get any error...
------------------------------------------------------------------------
------
Bernard Dautrevaux
Microprocess Ingéniérie
97 bis, rue de Colombes
92400 COURBEVOIE
FRANCE
Tel: +33 (0) 1 47 68 80 80
Fax: +33 (0) 1 47 88 97 85
e-mail: dautrevaux AT microprocess DOT com
b DOT dautrevaux AT usa DOT net
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>
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