mirror of
https://github.com/jart/cosmopolitan.git
synced 2024-05-17 02:52:40 +00:00
83 lines
4.1 KiB
C
83 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/syscall_support-nt.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/macros.internal.h"
|
|
#include "libc/nt/enum/fileflagandattributes.h"
|
|
#include "libc/nt/files.h"
|
|
#include "libc/nt/thunk/msabi.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/at.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
__msabi extern typeof(GetFileAttributes) *const __imp_GetFileAttributesW;
|
|
|
|
static int __mkntpathat_impl(int dirfd, const char *path, int flags,
|
|
char16_t file[hasatleast PATH_MAX]) {
|
|
char16_t dir[PATH_MAX];
|
|
uint32_t dirlen, filelen;
|
|
if (!isutf8(path, -1)) return eilseq(); // thwart overlong nul in conversion
|
|
if ((filelen = __mkntpath2(path, file, flags)) == -1) return -1;
|
|
if (!filelen) return enoent();
|
|
if (file[0] != u'\\' && dirfd != AT_FDCWD) { // ProTip: \\?\C:\foo
|
|
if (!__isfdkind(dirfd, kFdFile)) return ebadf();
|
|
dirlen = GetFinalPathNameByHandle(g_fds.p[dirfd].handle, dir, ARRAYLEN(dir),
|
|
kNtFileNameNormalized | kNtVolumeNameDos);
|
|
if (!dirlen) return __winerr();
|
|
if (dirlen + 1 + filelen + 1 > ARRAYLEN(dir)) {
|
|
STRACE("path too long: %#.*hs\\%#.*hs", dirlen, dir, filelen, file);
|
|
return enametoolong();
|
|
}
|
|
dir[dirlen] = u'\\';
|
|
memcpy(dir + dirlen + 1, file, (filelen + 1) * sizeof(char16_t));
|
|
memcpy(file, dir, (dirlen + 1 + filelen + 1) * sizeof(char16_t));
|
|
return dirlen + 1 + filelen;
|
|
} else {
|
|
return filelen;
|
|
}
|
|
}
|
|
|
|
int __mkntpathat(int dirfd, const char *path, int flags,
|
|
char16_t file[hasatleast PATH_MAX]) {
|
|
|
|
// convert the path.
|
|
int len;
|
|
if ((len = __mkntpathat_impl(dirfd, path, flags, file)) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
// if path ends with a slash, then we need to manually do what linux
|
|
// does and check to make sure it's a directory, and return ENOTDIR,
|
|
// since WIN32 will reject the path with EINVAL if we don't do this.
|
|
if (len && file[len - 1] == '\\') {
|
|
uint32_t fattr;
|
|
if (len > 1 && !(len == 3 && file[1] == ':')) {
|
|
file[--len] = 0;
|
|
}
|
|
if ((fattr = __imp_GetFileAttributesW(file)) != -1u &&
|
|
!(fattr & kNtFileAttributeReparsePoint) &&
|
|
!(fattr & kNtFileAttributeDirectory)) {
|
|
return enotdir();
|
|
}
|
|
}
|
|
|
|
return len;
|
|
}
|