This makes it possible for us to use system() and popen() with paths
that redirect to filenames that contain spaces, e.g.
system("echo.com hello >\"hello there.txt\"")
It's difficult to solve this problem, because WIN32 only allows passing
one single argument when launching programs and each program is allowed
to tokenize that however it wants. Most software follows the convention
of cmd.exe which is poorly documented and positively byzantine.
In the future we're going to solve this by not using cmd.exe at all and
instead embedding the cocmd.com interpreter into the system() function.
In the meantime, our documentation has been updated to help recalibrate
any expectation the user might hold regarding the security of using the
Windows command interpreter.
Fixes#644
This change also introduces partial faccessat() support for zipos and
makes some slight breaking changes in errno results. close() is fixed
to use `EBADF` rather than `EINVAL` and we're now using `ENOTSUP` not
`EOPNOTSUPP` to indicate that zipos doesn't support a system call yet
The metal boot sector code was wrapped in a single-quoted
string, like so:
MZqFpD='
...MZ HEADER...
...E_LFANEW...
...BIOS BOOT SECTOR...'
This might break the shell code loader if the boot sector code
contains a 0x27 (single quote) byte. This patch wraps the
boot sector code in a here-document instead:
MZqFpD='
...MZ HEADER...' <<'@'
...E_LFANEW...
...BIOS BOOT SECTOR...
@
This is harder to break — when interpreted as a shell script,
the code can only accidentally terminate the here-document
if there is a "\n@\n" sequence inside the BIOS boot portion.
This change reduces the .bss memory requirement for all executables by
O(64kb). The brk system calls are now fully tested and figured out and
might be useful for tiny programs that only target System Five.
This change improves copy_file_range(), sendfile(), splice(), openpty(),
closefrom(), close_range(), fadvise() and posix_fadvise() in addition to
writing tests that confirm things like errno and seeking behavior across
platforms. We now less aggressively polyfill behavior with some of these
functions when the platform support isn't available. Please see:
https://justine.lol/cosmopolitan/functions.html
This change upgrades to the latest Chromium Zlib, fixes bugs in redbean,
and introduces better support for reverse proxies like Cloudflare. This
change improves the security of redbean and it's recommended that users
upgrade to the release that'll follow. This change also updates the docs
to clarify how to use the security tools redbean provides e.g. pledge(),
unveil(), and the MODE=asan builds which improve memory safety.
Since we're now on Windows 8, we can have clone() work as advertised on
Windows, where it sends a futex wake to the child tid. It's also likely
we no longer need to work around thread flakes on OpenBSD, in _wait0().
Doing this makes binaries tinier, since we don't need to have all the
extra code for supporting a 32-bit address space. It also benefits us
because we're able to use WIN32 futexes, which makes locking simpler.
b69f3d2488 is what officially ended our
Windows 7 support. This change is merely a formalization. You can use
old versions of Cosmo now and forevermore if you need Windows 7 since
our repository is hermetic and vendors all its dependencies.
Won't fix#617
- Fix preadv() and pwritev() for old distros
- Introduce _npassert() and _unassert() macros
- Prove that file locks work properly on Windows
- Support fcntl(F_DUPFD_CLOEXEC) on more systems
