mirror of
https://github.com/jart/cosmopolitan.git
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68 lines
2.9 KiB
C
68 lines
2.9 KiB
C
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/*-*- 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/calls.h"
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#include "libc/calls/struct/stat.h"
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#include "libc/sysv/consts/ok.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zip.h"
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#include "libc/zipos/zipos.internal.h"
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// TODO: this should check parent directory components
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/**
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* Checks access metadata in αcτµαlly pδrταblε εxεcµταblε object store.
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*
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* @param uri is obtained via __zipos_parseuri()
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* @asyncsignalsafe
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*/
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int __zipos_access(const struct ZiposUri *name, int amode) {
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ssize_t cf;
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int rc, mode;
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struct Zipos *z;
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if ((z = __zipos_get()) && (cf = __zipos_find(z, name)) != -1) {
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mode = GetZipCfileMode(z->map + cf);
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if (amode == F_OK) {
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rc = 0;
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} else if (amode == R_OK) {
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if (mode & 0444) {
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rc = 0;
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} else {
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rc = eacces();
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}
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} else if (amode == W_OK) {
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if (mode & 0222) {
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rc = 0;
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} else {
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rc = eacces();
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}
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} else if (amode == X_OK) {
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if (mode & 0111) {
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rc = 0;
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} else {
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rc = eacces();
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}
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} else {
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rc = einval();
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}
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} else {
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rc = enoent();
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}
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return rc;
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}
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