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Improve zip read-only filesystem

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readdir() will now always yield an inode that's consistent with stat()
on ZipOS and Windows in general. More APIs have been updated to return
the appropriate error code when inappropriately trying to do ops, like
sockets, with a zip file descriptor. The path normalization algorithms
are now fully fleshed out. Some socket APIs have been fixed so they'll
raise EBADF vs. ENOTSOCK appropriately. Lastly seekdir() will now work
properly on NetBSD and FreeBSD (not sure why anyone would even use it)
This commit is contained in:
Justine Tunney 2023-08-16 15:53:06 -07:00
parent dc6c67256f
commit b76b2be2d0
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GPG key ID: BE714B4575D6E328
47 changed files with 644 additions and 269 deletions
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42
libc/runtime/zipos-inode.c Normal file
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/*-*- 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 2023 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/assert.h"
#include "libc/limits.h"
#include "libc/runtime/zipos.internal.h"
#include "libc/stdio/stdio.h"
#include "libc/zip.internal.h"
static uint64_t __zipos_fnv(const char *s, int len) {
uint64_t hash = 0xcbf29ce484222325;
for (int i = 0; i < len; i++) {
hash *= 0x100000001b3;
hash ^= (unsigned char)s[i];
}
return hash;
}
uint64_t __zipos_inode(struct Zipos *zipos, int64_t cfile, //
const void *name, size_t namelen) {
unassert(cfile >= 0);
if (cfile == ZIPOS_SYNTHETIC_DIRECTORY) {
if (namelen && ((char *)name)[namelen - 1] == '/') --namelen;
cfile = INT64_MIN | __zipos_fnv(name, namelen);
}
return cfile;
}