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From: Corinna Vinschen <corinna@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin] Cygwin: drop last usage of RtlCreateUnicodeStringFromAsciiz Date: Fri, 5 Aug 2022 09:46:05 +0000 (GMT) [thread overview] Message-ID: <20220805094605.46A5B3858C53@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=d097a96e6e5319ab622d5d737c70b21e4a231bec commit d097a96e6e5319ab622d5d737c70b21e4a231bec Author: Corinna Vinschen <corinna@vinschen.de> Date: Fri Aug 5 11:45:49 2022 +0200 Cygwin: drop last usage of RtlCreateUnicodeStringFromAsciiz This function is just bad. It really only works for ASCII chars, everything else is broken after the conversion. Introduce new helper function sys_mbstouni to replace RtlCreateUnicodeStringFromAsciiz in hash_path_name. Signed-off-by: Corinna Vinschen <corinna@vinschen.de> Diff: --- winsup/cygwin/ntdll.h | 3 ++- winsup/cygwin/path.cc | 6 ++++-- winsup/cygwin/wchar.h | 12 ++++++++++++ 3 files changed, 18 insertions(+), 3 deletions(-) diff --git a/winsup/cygwin/ntdll.h b/winsup/cygwin/ntdll.h index bdc1c1e40..0f2310882 100644 --- a/winsup/cygwin/ntdll.h +++ b/winsup/cygwin/ntdll.h @@ -1556,7 +1556,8 @@ extern "C" NTSTATUS RtlCreateAcl (PACL, ULONG, ULONG); PDEBUG_BUFFER RtlCreateQueryDebugBuffer (ULONG, BOOLEAN); NTSTATUS RtlCreateSecurityDescriptor (PSECURITY_DESCRIPTOR, ULONG); - BOOLEAN RtlCreateUnicodeStringFromAsciiz (PUNICODE_STRING, PCSTR); + /* Don't use this function! It's almost always wrong! */ + // BOOLEAN RtlCreateUnicodeStringFromAsciiz (PUNICODE_STRING, PCSTR); NTSTATUS RtlDeleteSecurityObject (PSECURITY_DESCRIPTOR *); NTSTATUS RtlDestroyQueryDebugBuffer (PDEBUG_BUFFER); NTSTATUS RtlDowncaseUnicodeString (PUNICODE_STRING, PUNICODE_STRING, BOOLEAN); diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc index b159b56d0..3e436dc65 100644 --- a/winsup/cygwin/path.cc +++ b/winsup/cygwin/path.cc @@ -3686,9 +3686,11 @@ ino_t hash_path_name (ino_t hash, const char *name) { UNICODE_STRING uname; - RtlCreateUnicodeStringFromAsciiz (&uname, name); + tmp_pathbuf tp; + + tp.u_get (&uname); + sys_mbstouni (&uname, HEAP_NOTHEAP, name); ino_t ret = hash_path_name (hash, &uname); - RtlFreeUnicodeString (&uname); return ret; } diff --git a/winsup/cygwin/wchar.h b/winsup/cygwin/wchar.h index ff1d4f1fa..0484b27d5 100644 --- a/winsup/cygwin/wchar.h +++ b/winsup/cygwin/wchar.h @@ -91,10 +91,22 @@ sys_mbstowcs (wchar_t * dst, size_t dlen, const char *src, size_t sys_mbstowcs_alloc (wchar_t **, int, const char *, size_t = (size_t) -1); +static inline size_t +sys_mbstouni (PUNICODE_STRING dst, int type, const char *src, + size_t nms = (size_t) -1) +{ + /* sys_mbstowcs returns length *excluding* trailing \0 */ + size_t len = sys_mbstowcs (dst->Buffer, type, src, nms); + dst->Length = len * sizeof (WCHAR); + dst->MaximumLength = dst->Length + sizeof (WCHAR); + return dst->Length; +} + static inline size_t sys_mbstouni_alloc (PUNICODE_STRING dst, int type, const char *src, size_t nms = (size_t) -1) { + /* sys_mbstowcs returns length *including* trailing \0 */ size_t len = sys_mbstowcs_alloc (&dst->Buffer, type, src, nms); dst->MaximumLength = len * sizeof (WCHAR); dst->Length = dst->MaximumLength - sizeof (WCHAR);
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