From: John Scott <jscott@posteo.net>
To: musl@lists.openwall.com
Subject: [musl] fputs/fputc doesn't set errno on failure
Date: Thu, 08 Oct 2020 10:55:47 -0400 [thread overview]
Message-ID: <20475045.GjpEljjT90@t450> (raw)
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Hi,
I'm not subscribed, please keep me CC'd.
In this corner case, errno is unset despite fputs giving an error. I'm on Debian testing using musl-gcc 1.2.1.
#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <errno.h>
#include <stdio.h>
int main(void) {
FILE *f = fopen("/", "r");
if(f == NULL) {
perror("fopen()");
}
if(fputs("Hello world\n", f) == EOF) {
assert(errno);
perror("fputs()");
}
}
With glibc this prints EBADF for fputs.
The wiki page about writing tests [1], which I thought this would be a good candidate for, has the 404 link http://nsz.repo.hu/git/?p=libc-test
Please let me know if I can help debugging.
[1] https://wiki.musl-libc.org/writing-tests.html
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next reply other threads:[~2020-10-08 15:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 14:55 John Scott [this message]
2020-10-08 16:21 ` Rich Felker
2020-10-08 16:23 ` Markus Wichmann
2020-10-08 19:55 ` Szabolcs Nagy
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