Mail Archives: cygwin/2009/05/08/15:22:21
2009/5/9 Corinna Vinschen <corinna-cygwin AT cygwin DOT com>:
> can't see a fault in Cygwin. Neither from strace, nor in a GDB session.
> The readdir calls return the filenames using the SO sequences so that
> a valid byte-stream is created which also works in the C locale.
> However, for some reason there's a EILSEQ (138) errno generated, but
> from what I can tell it's not generated in Cygwin or newlib code.
I think that I found Cygwin-1.7's bug.
> int bytes = f_wctomb (_REENT, buf, pw, charset, &ps);
f_wctomb is __ascii_wctomb when not using setlocale(LC_CTYPE).
If return value of __ascii_wctomb == -1, errno == EILSEQ.
I think that it is necessary to reset errno after wctomb.
--- a/winsup/cygwin/strfuncs.cc Thu May 07 12:29:17 2009 +0900
+++ b/winsup/cygwin/strfuncs.cc Sat May 09 04:01:33 2009 +0900
@@ -432,6 +432,7 @@
ASCII SO; UTF-8 representation of invalid char. */
if (bytes == -1 && *charset != 'U'/*TF-8*/)
{
+ errno = 0;
buf[0] = 0x0e; /* ASCII SO */
bytes = __utf8_wctomb (_REENT, buf + 1, pw, charset, &ps);
if (bytes == -1)
[test code]
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
int main(void) {
DIR *dir;
struct dirent *ent;
dir = opendir(".");
while ((ent = readdir(dir)) != NULL)
printf("%d\n", ent->d_name, errno);
printf("%d\n", errno);
closedir(dir);
return 0;
}
[result 1.7.0-47]
0
0
138
138
138
[result applied above patch]
0
0
0
0
0
--
IWAMURO Motnori <http://vmi.jp/>
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