The `com` parameter to `TryPath` was always 1, so there was no reason to
have it. This patch changes the logic to be as though `com` was 0, which
provides a possible answer to the TODO question -- the answer is no.
If we never care about appending `.com`, then `CopyWithCwd` doesn't need
to return anything beyond a boolean success value.
__res_send returns the full answer length even if it didn't fit the
buffer, but __dns_parse expects the length of the filled part of the
buffer.
Analogous to Musl commit 77327ed064bd57b0e1865cd0e0364057ff4a53b4 which
fixed the only other __dns_parse call site.
The name resolution would abort when getting more than 63 records per
request, due to what seems to be a left-over from the original code.
This check was non-breaking but spurious prior to TCP fallback
support, since any 512-byte packet with more than 63 records was
necessarily malformed. But now, it wrongly rejects valid results.
Reported by Daniel Stefanik in Alpine Linux aports issue 15320.
f314e133929b6379eccc632bef32eaebb66a7335
Author: Rich Felker <dalias@aerifal.cx>
Date: Thu Nov 16 12:55:21 2023 -0500
mntent: fields are delimited only by tabs or spaces, not general whitespace
this matters because the kernel-provided mtab only escapes tabs,
spaces, newlines, and backslashes. it leaves carriage returns, form
feeds, and vertical tabs literal.
commit ee1d39bc1573c1ae49ee6b658938b56bbef95a6c
Author: q66 <q66@chimera-linux.org>
Date: Thu Nov 9 20:48:44 2023 +0100
mntent: unescape octal sequences
As entries in mtab are delimited by spaces, whitespace characters
are escaped as octal sequences. When reading them out, we have to
unescape these sequences to get the proper string.
Previously, the atomic store looked like it was happening while the
struct's memory was still poisoned. I was unable to observe any issues
with this, but this change seems to make the code more obviously correct
(at the cost of a redundant atomic store to zeroed space in case the map
needed to be extended.)
MaGuess on Discord pointed out the fact that cosmocc contradicts itself
on the signedness of `char`. It's up to each platform to choose one, so
the cosmo platform shall choose signed. The rationale is it makes the C
language syntax more internally similar. `char` should be `signed char`
for the same reason `int` means `signed int`. It's recommended that you
still assume `char` could go either way since that's portable thinking.
But if you want to assume we'll always have signed char, that's ok too.
You can now run commands like `x86_64-unknown-cosmo-c++ -S` when using
your cosmocc toolchain. Please note the S flag isn't supported for the
cosmocc command itself.
We technically support versions much earlier, possibly dating back to
2018 or earlier, but they're not officially supported since I have no
way of testing them.
Closes#1129
Now that these functions are behind _COSMO_SOURCE there's no reason for
having the ugly underscore anymore. To use these functions, you need to
pass -mcosmo to cosmocc.
The WIN32 CreateProcess() function does not require an .exe or .com
suffix in order to spawn an executable. Now that we have Cosmo bash
we're no longer so dependent on the cmd.exe prompt.
- Write some more unit tests
- memcpy() on ARM is now faster
- Address the Musl complex math FIXME comments
- Some libm funcs like pow() now support setting errno
- Import the latest and greatest math functions from ARM
- Use more accurate atan2f() and log1pf() implementations
- atoi() and atol() will no longer saturate or clobber errno
Multiple projects I care about make the assumption that this isn't a
system call that sleeps for a particular number of nanonseconds, but
rather a function that parks processes on kernel scheduler quantums.
Anyone who wants the old behavior should use cosmo_clock_nanosleep()
* Fix `if...fi` generation in the generated APE shell script
A shell will fail with a syntax error on an empty `if` or `else` body.
That is, neither of these is allowed:
# Empty `if`
if [ ... ]; then
fi
# Empty `else`
if [ ... ]; then
...
else
fi
There were two places where `apelink` could generate problematic `if`'s:
1. The XNU shell generation for aarch64 binaries when no loaders (either
binary or source) are provided. They can't assimilate, so the resulting
`else` body becomes empty.
There is actually a code path guarded by the `gotsome` variable that
inserts an extra `true` in this case, but the variable was never
initialized, so in practice this code path didn't activate in my
tests. This is fixed by initializing the variable.
2. The loader extraction code when no loaders are provided and XNU
support is requested. This is fixed by adding a simliar code path
that prevents an empty body from being generated.
* Update the apelink manual after commit d53c335
The `-s` option changed its meaning, but the docs weren't updated.
* Fix reading the same symbol twice when using `{f,}scanf()`
PR #924 appears to use `unget()` subtly incorrectly when parsing
floating point numbers. The rest of the code only uses `unget()`
immediately followed by `goto Done;` to return back the symbol that
can't possibly belong to the directive we're processing.
With floating-point, however, the ungot characters could very well
be valid for the *next* directive, so we will essentially read them
twice. It can't be seen in `sscanf()` tests because `unget()` is a
no-op there, but the test I added for `fscanf()` fails like this:
...
EXPECT_EQ(0xDEAD, i1)
need 57005 (or 0xdead) =
got 908973 (or 0x000ddead)
...
EXPECT_EQ(0xBEEF, i2)
need 48879 (or 0xbeef) =
got 769775 (or 0x000bbeef)
This means we read 0xDDEAD instead of 0xDEAD and 0xBBEEF instead of
0xBEEF. I checked that both musl and glibc read 0xDEAD/0xBEEF, as
expected.
Fix the failing test by removing the unneeded `unget()` calls.
* Don't read invalid floating-point numbers in `*scanf()`
Currently, we just ignore any errors from `strtod()`. They can
happen either because no valid float can be parsed at all, or
because the state machine recognizes only a prefix of a valid
floating-point number.
Fix this by making sure `strtod()` parses everything we recognized,
provided it's non-empty. This requires to pop the last character
off the FP buffer, which is supposed to be parsed by the next
`*scanf()` directive.
* Make `%c` parsing in `*scanf()` respect the C standard
Currently, `%c`-style directives always succeed even if there
are actually fewer characters in the input than requested.
Before the fix, the added test fails like this:
...
EXPECT_EQ(2, sscanf("ab", "%c %c %c", &c2, &c3, &c4))
need 2 (or 0x02 or '\2' or ENOENT) =
got 3 (or 0x03 or '\3' or ESRCH)
...
EXPECT_EQ(0, sscanf("abcd", "%5c", s2))
need 0 (or 0x0 or '\0') =
got 1 (or 0x01 or '\1' or EPERM)
musl and glibc pass this test.
It's now possible to use redbean Fetch() with arbitrary HTTP methods,
e.g. LIST which is used by Hashicorp. There's an eight char limit and
uppercase canonicalization still happens. This change also includes a
better function for launching a browser tab, that won't deadlock on a
headless workstation running Debian.
Closes#1107
Sometimes we need to interact with code that wasn't compiled using
`-fno-omit-frame-pointer`. For example, if a function pointer gets
passed and called by a foreign function, linked by cosmo_dlopen().
Function call tracing will now detect backtrace pointer corruption
and simply reduce the indentation level back to zero, as a result.
