jeremyd2019’s gists

jeremyd2019 / windows_releases.md

Created March 28, 2025 19:14

windows releases

jeremyd2019 / find_fast_cwd.cc

Last active April 9, 2025 09:34

prototype code to find fast cwd pointer on arm64

jeremyd2019 / iswow64process2_aarch64.exe

Last active November 22, 2024 19:44

prototype code for identifying wow64 in cygwin uname

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jeremyd2019 / wine-arch-detector.c

Last active June 20, 2024 19:56

exec proper wine based on arch of PE binary

	/* Register with:
	* echo :wine:M::MZ::/opt/wine-arch-detector:PO > /proc/sys/fs/binfmt_misc/register
	*/
	#include <errno.h>
	#include <stdio.h>
	#include <string.h>
	#include <sys/auxv.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <unistd.h>

jeremyd2019 / cygwin_volumes.c

Created June 4, 2024 00:19

use cygwin functions to list windows volume roots as `\0`-delimited cygwin paths

jeremyd2019 / cygwin.py

Last active February 20, 2025 23:55

python ctypes interface to cygwin apis

	import contextlib
	import ctypes
	import errno
	import os

	__all__ = ["CCP_POSIX_TO_WIN_A", "CCP_POSIX_TO_WIN_W",
	"CCP_WIN_A_TO_POSIX", "CCP_WIN_W_TO_POSIX",
	"CCP_ABSOLUTE", "CCP_RELATIVE", "CCP_PROC_CYGDRIVE",
	"cygwin_conv_path", "cygwin_conv_path_list",
	"cygwin_winpid_to_pid", "cygwin_pid_to_winpid",

jeremyd2019 / volumes.c

Last active May 30, 2024 23:47

list windows volume roots as `\0`-delimited cygwin paths

	#include <windows.h>
	#include <stdio.h>
	#include <wchar.h>
	#include <sys/cygwin.h>

	/* based on the starting point
	https://learn.microsoft.com/en-us/windows/win32/fileio/displaying-volume-paths
	*/
	void main(void)
	{

jeremyd2019 / pacman.strace.txt

Created May 27, 2024 02:37

strace of pacman trying to unlink msys-2.0.dll

	122 237566414 [main] pacman 494 unlink_nt: Trying to delete \??\D:\t\msys64\usr\bin\msys-2.0.dll, isdir = 0
	252 237566666 [main] pacman 494 unlink_nt: Setting delete disposition on \??\D:\t\msys64\usr\bin\msys-2.0.dll failed, status = 0xC0000121
	172 237566838 [main] pacman 494 unlink_nt: Cannot delete \??\D:\t\msys64\usr\bin\msys-2.0.dll, try delete-on-close
	252 237567090 [main] pacman 494 unlink_nt: Setting delete-on-close on \??\D:\t\msys64\usr\bin\msys-2.0.dll failed, status = 0xC0000121
	685 237567775 [main] pacman 494 try_to_bin: Setting delete disposition on $RECYCLE.BIN\S-1-5-21-XXX\.��60000001071944502ffdd679fdc9c66a (\??\D:\t\msys64\usr\bin\msys-2.0.dll) failed, status = 0xC0000121
	522 237568297 [main] pacman 494 try_to_bin: Overwriting $RECYCLE.BIN\S-1-5-21-XXX\.��60000001071944502ffdd679fdc9c66a (\??\D:\t\msys64\usr\bin\msys-2.0.dll) with $RECYCLE.BIN\S-1-5-21-XXX\.��60000001071944502ffdd679fdc9c66aX failed, status = 0xC0000022
	215 237568512 [main] pacman 494 try_to_bin: \??\D:\t

jeremyd2019 / cleanup.sh

Last active March 3, 2025 06:50

Script to clean up files that msys2-runtime moved to recycle bin because they were in use

	#!/bin/bash -ex

	export LC_CTYPE=C.UTF-8 LC_COLLATE=C.UTF-8

	IFS=. read -r cygmajor cygminor _ < <(uname -r)

	declare -a roots

	if [ "${cygmajor}" -gt 3 -o "${cygmajor}" -eq 3 -a "${cygminor}" -ge 6 ]; then
	# as of cygwin 3.6, volume roots are parsable from /proc/mounts

jeremyd2019 / testfork.c

Last active May 21, 2024 00:27

reproducer for cygwin hangs under emulation on arm64