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https://github.com/jart/cosmopolitan.git
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7166679620
- Fix a regression with the previous change that broke redbean - Add chroot(), resource limit, seccomp, and other stuff to redbean - Write lots and lots of documentation - Iron out more system call issues
63 lines
3.1 KiB
C
63 lines
3.1 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 2022 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/errno.h"
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#include "libc/nt/enum/fileflagandattributes.h"
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#include "libc/nt/errors.h"
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#include "libc/nt/files.h"
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static textwindows bool SubpathExistsThatsNotDirectory(char16_t *path) {
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int e;
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char16_t *p;
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uint32_t attrs;
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e = errno;
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while ((p = strrchr16(path, '\\'))) {
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*p = u'\0';
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if ((attrs = GetFileAttributes(path)) != -1u) {
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if (attrs & kNtFileAttributeDirectory) {
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return false;
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} else {
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return true;
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}
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} else {
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errno = e;
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}
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}
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return false;
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}
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// WIN32 doesn't distinguish between ENOTDIR and ENOENT. UNIX strictly
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// requires that a directory component *exists* but is not a directory
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// whereas WIN32 will return ENOTDIR if a dir label simply isn't found
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//
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// - ENOTDIR: A component used as a directory in pathname is not, in
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// fact, a directory. -or- pathname is relative and dirfd is a file
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// descriptor referring to a file other than a directory.
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//
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// - ENOENT: A directory component in pathname does not exist or is a
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// dangling symbolic link.
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//
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textwindows int64_t __fix_enotdir(int64_t rc, char16_t *path) {
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if (rc == -1 && errno == kNtErrorPathNotFound) {
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if (!SubpathExistsThatsNotDirectory(path)) {
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errno = kNtErrorFileNotFound;
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}
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}
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return rc;
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}
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