From: "Dmitry V. Levin" <ldv@altlinux.org>
To: musl@lists.openwall.com
Subject: Re: [musl] errno on writing to read-only files
Date: Wed, 13 Oct 2021 10:25:12 +0300 [thread overview]
Message-ID: <20211013072512.GB15338@altlinux.org> (raw)
In-Reply-To: <0100017c773d8050-290fe58a-7804-4399-83f8-0ce8d845f7d2-000000@email.amazonses.com>
Hi,
On Wed, Oct 13, 2021 at 01:21:31AM +0000, (GalaxyMaster) wrote:
> Hello,
>
> I am observing the following on musl and I am not sure that this is the way it
> should be:
> ===
> galaxy@archlinux:~/musl-tests $ cat fput-to-readonly.c
> #include <stdio.h>
> #include <errno.h>
>
> int main() {
> FILE *f;
> int i = 0;
> f = fopen("fput-to-readonly.c", "r");
> 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.
--
ldv
next prev parent reply other threads:[~2021-10-13 7:25 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-13 1:21 (GalaxyMaster)
2021-10-13 7:25 ` Dmitry V. Levin [this message]
2021-10-13 8:06 ` (GalaxyMaster)
2021-10-13 14:01 ` Rich Felker
2021-10-16 6:30 ` A. Wilcox
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