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cosmopolitan/libc/runtime/zipos-stat.c

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Initial import
2020-06-15 14:18:57 +00:00
/*-*- 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 2020 Justine Alexandra Roberts Tunney │
│ │
Change license
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│ 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. │
Initial import
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│ │
Change license
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│ 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. │
Initial import
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╚─────────────────────────────────────────────────────────────────────────────*/
Improve zip read-only filesystem 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)
2023-08-16 22:53:06 +00:00
#include "libc/calls/struct/stat.h"
Move zipos into runtime package This way complex runtime features (e.g. ftrace, symbol tables) can always yoink zipos support. This is important now that apelink.com automates embedding symbol tables for multiple cpus.
2023-08-12 06:14:02 +00:00
#include "libc/runtime/zipos.internal.h"
Make ZipOS and Qemu work better This change improves the dirstream library in a lot of respects, especially for /zip/... files. Also turn off MAP_STACK on Aarch64 because Qemu seems to implement it differently than Linux and it's probably responsible for a lot of mysterious crashes.
2023-08-16 01:24:53 +00:00
#include "libc/sysv/errfuns.h"
Initial import
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/**
* Reads file metadata from αcτµαlly pδrταblε εxεcµταblε object store.
*
Emulate ENOTDIR better
2023-08-17 03:11:19 +00:00
* @param name is obtained via __zipos_parseuri()
Initial import
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* @asyncsignalsafe
*/
Make ZipOS and Qemu work better This change improves the dirstream library in a lot of respects, especially for /zip/... files. Also turn off MAP_STACK on Aarch64 because Qemu seems to implement it differently than Linux and it's probably responsible for a lot of mysterious crashes.
2023-08-16 01:24:53 +00:00
int __zipos_stat(struct ZiposUri *name, struct stat *st) {
Rewrite ZipOS This reduces the virtual memory usage of Emacs for me by 30%. We now have a simpler implementation that uses read(), rather mmap()ing the whole executable.
2023-10-03 14:27:25 +00:00
int cf;
Add x86_64-linux-gnu emulator I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
2020-08-25 11:23:25 +00:00
struct Zipos *zipos;
Make ZipOS and Qemu work better This change improves the dirstream library in a lot of respects, especially for /zip/... files. Also turn off MAP_STACK on Aarch64 because Qemu seems to implement it differently than Linux and it's probably responsible for a lot of mysterious crashes.
2023-08-16 01:24:53 +00:00
if (!(zipos = __zipos_get())) return enoexec();
Emulate ENOTDIR better
2023-08-17 03:11:19 +00:00
if ((cf = __zipos_find(zipos, name)) == -1) return -1;
Improve zip read-only filesystem 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)
2023-08-16 22:53:06 +00:00
if (__zipos_stat_impl(zipos, cf, st)) return -1;
st->st_ino = __zipos_inode(zipos, cf, name->path, name->len);
return 0;
Initial import
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}
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