mirror of
https://github.com/jart/cosmopolitan.git
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91 lines
4.3 KiB
C
91 lines
4.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/internal.h"
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#include "libc/calls/syscall_support-nt.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/macros.internal.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/files.h"
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#include "libc/nt/thunk/msabi.h"
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#include "libc/str/str.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/errfuns.h"
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static textwindows int __mkntpathath_impl(int64_t dirhand, const char *path,
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int flags,
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char16_t file[hasatleast PATH_MAX]) {
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size_t n;
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char16_t dir[PATH_MAX];
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uint32_t dirlen, filelen;
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if (!isutf8(path, -1)) return eilseq(); // thwart overlong nul in conversion
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if ((filelen = __mkntpath2(path, file, flags)) == -1) return -1;
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if (!filelen) return enoent();
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if (file[0] != u'\\' && dirhand != AT_FDCWD) { // ProTip: \\?\C:\foo
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dirlen = GetFinalPathNameByHandle(dirhand, dir, ARRAYLEN(dir),
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kNtFileNameNormalized | kNtVolumeNameDos);
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if (!dirlen) return __winerr();
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if (dirlen + 1 + filelen + 1 > ARRAYLEN(dir)) return enametoolong();
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dir[dirlen] = u'\\';
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memcpy(dir + dirlen + 1, file, (filelen + 1) * sizeof(char16_t));
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memcpy(file, dir, ((n = dirlen + 1 + filelen) + 1) * sizeof(char16_t));
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return __normntpath(file, n);
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} else {
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return filelen;
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}
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}
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textwindows int __mkntpathath(int64_t dirhand, const char *path, int flags,
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char16_t file[hasatleast PATH_MAX]) {
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// convert the path.
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int len;
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if ((len = __mkntpathath_impl(dirhand, path, flags, file)) == -1) {
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return -1;
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}
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// if path ends with a slash, then we need to manually do what linux
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// does and check to make sure it's a directory, and return ENOTDIR,
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// since WIN32 will reject the path with EINVAL if we don't do this.
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if (len && file[len - 1] == '\\') {
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uint32_t fattr;
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if (len > 1 && !(len == 3 && file[1] == ':')) {
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file[--len] = 0;
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}
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if ((fattr = GetFileAttributes(file)) != -1u &&
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!(fattr & kNtFileAttributeReparsePoint) &&
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!(fattr & kNtFileAttributeDirectory)) {
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return enotdir();
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}
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}
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return len;
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}
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textwindows int __mkntpathat(int dirfd, const char *path, int flags,
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char16_t file[hasatleast PATH_MAX]) {
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int64_t dirhand;
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if (dirfd == AT_FDCWD) {
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dirhand = AT_FDCWD;
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} else if (__isfdkind(dirfd, kFdFile)) {
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dirhand = g_fds.p[dirfd].handle;
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} else {
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return ebadf();
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}
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return __mkntpathath(dirhand, path, flags, file);
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}
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