回复：lib/59067: wctrans got error member.

["J217" <ru_j217%aliyun.com@localhost>]

Hi Thomas:

Thanks for your reply.

Here is some more informations.

I tried print out the result of lower:

When I set it to "towlower":

And here is the result of setting to "tolower":

You can try again and change LC_ALL to C maybe the crash will be come out.

printf("set locale: %s\n", setlocale(LC_ALL, "C"));

The source code will be found here:

https://github.com/NetBSD/src/blob/trunk/lib/libc/locale/global_locale.c#L164

https://github.com/NetBSD/src/blob/trunk/lib/libc/locale/runetable.c#L323

And sorry for this, I'm a newbee for NetBSD, I couldn't find a way to set up the network for netbsd, so I couldn't export the core file.

------------------------------------------------------------------

发件人：Thomas Klausner via gnats <gnats-admin%NetBSD.org@localhost>

发送时间：2025年2月11日(星期二) 14:45

收件人："lib-bug-people"<lib-bug-people%netbsd.org@localhost>; "gnats-admin"<gnats-admin%netbsd.org@localhost>; "netbsd-bugs"<netbsd-bugs%netbsd.org@localhost>; ru_j217<ru_j217%aliyun.com@localhost>

主　题：Re: lib/59067: wctrans got error member.

The following reply was made to PR lib/59067; it has been noted by GNATS.

From: Thomas Klausner <wiz%NetBSD.org@localhost>
To: gnats-bugs%netbsd.org@localhost
Cc:
Subject: Re: lib/59067: wctrans got error member.
Date: Tue, 11 Feb 2025 07:44:40 +0100

On Tue, Feb 11, 2025 at 02:40:00AM +0000, ru_j217%aliyun.com@localhost wrote:
> wctrans got error member make a crash on running.

I didn't see an error when I tried your test program on NetBSD
10.99.12/x86_64. Where did you get a crash? What was the backtrace?

However, you should really check the return value of wctrans, the man
page says:

RETURN VALUES
      wctrans() returns:

      0             If the string charmap does not corresponding to a valid
                    character mapping name.

(There's a typo, it should be "tolower", not "towlower".)

#include <stdio.h>
#include <wchar.h>
#include <locale.h>
#include <wctype.h>

int main()
{
    printf("set locale: %s\n", setlocale(LC_ALL, ""));

    wchar_t wc = L'A';
    wctrans_t lower = wctrans("towlower");
    if (lower == 0) {
  printf("wctrans failed\n");
  return 1;
    }

    // crash on this line
    wchar_t res = towctrans(wc, lower);

    if (res != WEOF) {
        printf("wc: %lc, res: %lc\n", wc, res);
    } else {
        printf("test failed!\n");
    }

    return 0;
}

  Thomas