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win32: use CreateFile in p_open

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Signed-off-by: Sven Strickroth <email@cs-ware.de>
This commit is contained in:
Sven Strickroth 2017-01-14 18:20:59 +01:00 committed by Edward Thomson
parent fbc6910f6b
commit ef5cfcdb4f
1 changed files with 56 additions and 4 deletions
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60
src/win32/posix_w32.c
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@ -438,17 +438,33 @@ int p_symlink(const char *old, const char *new)
return git_futils_fake_symlink(old, new);
}
GIT_INLINE(int) open_once(const wchar_t *path, int flags, mode_t mode)
GIT_INLINE(int) open_once(
const wchar_t *path,
DWORD access,
DWORD sharing,
DWORD creation_disposition,
DWORD attributes,
int osf_flags)
{
int ret = _wopen(path, flags, mode);
HANDLE handle = CreateFileW(path, access, sharing, NULL,
creation_disposition, attributes, 0);
return (ret < 0 && last_error_retryable()) ? GIT_RETRY : ret;
if (handle == INVALID_HANDLE_VALUE) {
if (last_error_retryable())
return GIT_RETRY;
set_errno();
return -1;
}
return _open_osfhandle((intptr_t)handle, osf_flags);
}
int p_open(const char *path, int flags, ...)
{
git_win32_path wpath;
mode_t mode = 0;
DWORD access, sharing, creation, attributes, osf_flags;
if (git_win32_path_from_utf8(wpath, path) < 0)
return -1;
@ -461,8 +477,44 @@ int p_open(const char *path, int flags, ...)
va_end(arg_list);
}
switch (flags & (O_WRONLY | O_RDWR)) {
case O_WRONLY:
access = GENERIC_WRITE;
break;
case O_RDWR:
access = GENERIC_READ | GENERIC_WRITE;
break;
default:
access = GENERIC_READ;
break;
}
sharing = FILE_SHARE_READ | FILE_SHARE_WRITE;
switch (flags & (O_CREAT | O_TRUNC | O_EXCL)) {
case O_CREAT | O_EXCL:
case O_CREAT | O_TRUNC | O_EXCL:
creation = CREATE_NEW;
break;
case O_CREAT | O_TRUNC:
creation = CREATE_ALWAYS;
break;
case O_TRUNC:
creation = TRUNCATE_EXISTING;
break;
case O_CREAT:
creation = OPEN_ALWAYS;
break;
default:
creation = OPEN_EXISTING;
break;
}
attributes = (mode & S_IWRITE) ? FILE_ATTRIBUTE_NORMAL : FILE_ATTRIBUTE_READONLY;
osf_flags = flags & (O_RDONLY | O_APPEND);
do_with_retries(
open_once(wpath, flags | STANDARD_OPEN_FLAGS, mode & WIN32_MODE_MASK),
open_once(wpath, access, sharing, creation, attributes, osf_flags),
0);
}