musl - Re: errno on writing to read-only files

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Message-ID: <0100017c78b013a5-f8641dc7-a829-41eb-9a24-746239135dad-000000@email.amazonses.com>
Date: Wed, 13 Oct 2021 08:06:17 +0000
From: "(GalaxyMaster)" <galaxy@...nwall.com.au>
To: musl@...ts.openwall.com
Subject: Re: errno on writing to read-only files

Dmitry,

On Wed, Oct 13, 2021 at 10:25:12AM +0300, Dmitry V. Levin wrote:
> > 	errno = 0;
> > 	i = fputs("should not be written", f);
> > 	printf("i = %d (should be negative [EOF = %d])\n", i, EOF);
> > 	printf("errno = %d\n", errno);
> 
> Note that the first "printf" invocation is allowed to clobber errno
> and this is not musl-specific.

Thanks, noted.  I will ensure that in my future test cases I will put
printing errno right after the function I am checking.

-- 
(GM)

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