Hello,
I've found that if you use cygwin to create a file with badly-encoded
UTF-8, readdir() gives out an entry with a name that cygwin won't
subsequently accept.
* create a file using filename with hex bytes F4 8F BF BF
* readdir() reports the filename as hex bytes E2 8E B3 ED BF BF
* attempting to open or unlink the filename E2 8E B3 ED BF BF fails
* attempting to open or unlink the filename F4 8F BF BF succeeds
Here's a test case. Beware that it will delete everything in the
current directory.
#include <stdio.h>
#include <dirent.h>
int main() {
DIR *d;
struct dirent *de;
char *fname = "\xF4\x8F\xBF\xBF";
// touch file
fclose(fopen(fname, "wb"));
// iterate through dir
d = opendir(".");
while ((de = readdir(d))) {
if (de->d_name[0] == '.') continue;
printf("unlink(%s) = %d\n", de->d_name, unlink(de->d_name));
}
closedir(d);
// show that unlink works if you know the real filename
printf("unlink(%s) = %d\n", fname, unlink(fname));
}
This outputs (piped through hexdump -C)
00000000 75 6e 6c 69 6e 6b 28 e2 8e b3 ed bf bf 29 20 3d |unlink(......) =|
00000010 20 2d 31 0a 75 6e 6c 69 6e 6b 28 f4 8f bf bf 29 | -1.unlink(....)|
00000020 20 3d 20 30 0a | = 0.|
00000025
e.g.
unlink(\xe2\x8e\xb3\xed\xbf\xbf) = -1
unlink(\xf4\x8f\xbf\xbf) = 0
This is with cygwin package 1.7.35
$ cygcheck -c cygwin
Cygwin Package Information
Package Version Status
cygwin 1.7.35-1 OK
WIndows / DOS does not have the problem:
c:\test\t>dir
Volume in drive C has no label.
Volume Serial Number is ....-....
Directory of c:\test\t
25/03/2015 14:30 <DIR> .
25/03/2015 14:30 <DIR> ..
25/03/2015 14:30 0 ??
1 File(s) 0 bytes
2 Dir(s) 39,906,525,184 bytes free
c:\test\t>del *
c:\test\t\*, Are you sure (Y/N)? y
c:\test\t>dir
Volume in drive C has no label.
Volume Serial Number is ....-....
Directory of c:\test\t
25/03/2015 14:31 <DIR> .
25/03/2015 14:31 <DIR> ..
0 File(s) 0 bytes
2 Dir(s) 39,906,525,184 bytes free
Regards
Stuart
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