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Message-ID: <CABVSaD+0bg2Xe2eWRx27hRpBZAo_AaqZHjDP0ag2V42Gqc8vXA@mail.gmail.com>
Date: Tue, 13 Jun 2017 09:43:42 -0500
From: Xiaowei Zhan <zhanxw@...il.com>
To: musl@...ts.openwall.com
Subject: Different behavior (strtod) between musl and glibc
Hello,
I notice that when pass a non-numeric char to strtod, musl will set errno
to non-zero, but glibc will set errno to zero.
I am curious why this difference exists, and whether it is necessary to
make strtod in musl behave similarly to glibc.
Here is the toy program:
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
int main(int argc, char** argv) {
errno = 0;
char input[] = "NA023";
strtod(input, NULL);
printf("errno = %d\n", errno);
perror("strtod");
return 0;
}
Output (musl):
bash-4.3# ./main
errno = 22
strtod: Invalid argument
Output (glibc, Ubuntu 16.04):
> ./main
errno = 0
strtod: Success
Best,
Xiaowei
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