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Cygwin: add transform_chars_af_unix helper 

This function is going to be used for transposing sun_path of
abstract sockets.  This also adds a transposition of the NUL
character to tfx_chars since NUL-bytes in abstract socket names
are perfectly valid.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen 2018-03-02 18:11:57 +01:00
parent 488221cf5c
commit 7d260cfac4
2 changed files with 13 additions and 2 deletions
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2
winsup/cygwin/miscfuncs.h
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@ -96,6 +96,8 @@ transform_chars (PUNICODE_STRING upath, USHORT start_idx)
upath->Buffer + upath->Length / sizeof (WCHAR) - 1);
}
PWCHAR transform_chars_af_unix (PWCHAR, const char *, __socklen_t);
/* Memory checking */
int __reg2 check_invalid_virtual_addr (const void *s, unsigned sz);

13
winsup/cygwin/strfuncs.cc
View File

@ -22,7 +22,7 @@ details. */
is affected as well, but we can't transform it as long as we accept Win32
paths as input. */
static const WCHAR tfx_chars[] = {
0, 0xf000 | 1, 0xf000 | 2, 0xf000 | 3,
0xf000 | 0, 0xf000 | 1, 0xf000 | 2, 0xf000 | 3,
0xf000 | 4, 0xf000 | 5, 0xf000 | 6, 0xf000 | 7,
0xf000 | 8, 0xf000 | 9, 0xf000 | 10, 0xf000 | 11,
0xf000 | 12, 0xf000 | 13, 0xf000 | 14, 0xf000 | 15,
@ -61,7 +61,7 @@ static const WCHAR tfx_chars[] = {
converting back space and dot on filesystems only supporting DOS
filenames. */
static const WCHAR tfx_rev_chars[] = {
0, 0xf000 | 1, 0xf000 | 2, 0xf000 | 3,
0xf000 | 0, 0xf000 | 1, 0xf000 | 2, 0xf000 | 3,
0xf000 | 4, 0xf000 | 5, 0xf000 | 6, 0xf000 | 7,
0xf000 | 8, 0xf000 | 9, 0xf000 | 10, 0xf000 | 11,
0xf000 | 12, 0xf000 | 13, 0xf000 | 14, 0xf000 | 15,
@ -103,6 +103,15 @@ transform_chars (PWCHAR path, PWCHAR path_end)
*path = tfx_chars[*path];
}
PWCHAR
transform_chars_af_unix (PWCHAR out, const char *path, __socklen_t len)
{
len -= sizeof (__sa_family_t);
for (const unsigned char *p = (const unsigned char *) path; len-- > 0; ++p)
*out++ = (*p <= 0x7f) ? tfx_chars[*p] : *p;
return out;
}
/* The SJIS, JIS and eucJP conversion in newlib does not use UTF as
wchar_t character representation. That's unfortunate for us since
we require UTF for the OS. What we do here is to have our own