Skip to content

Instantly share code, notes, and snippets.

@darealshinji
darealshinji / linux_check_instance.c
Created March 15, 2025 16:52
check if another instance of this program is already running
/* Linux: check if another instance of this program is already running
* by looking through the /proc/<PID>/ entries */
/**
* MIT License
*
* Copyright (C) 2024 Carsten Janssen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
#!/bin/bash
set -e
set -x
# how to run this script in podman:
#
# BUILD_ROOT="$HOME/Downloads"
#
# podman run --rm --init \
@darealshinji
darealshinji / kbhit-linux.c
Last active June 8, 2024 18:14
kbhit() for Linux
/**
* MIT License
*
* Copyright (C) 2024 Carsten Janssen
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
#include <iostream>
/*
./bootstrap.sh --with-libraries=filesystem,url
./b2 -j4 link=static variant=release cxxflags="-O3 -ffunction-sections -fdata-sections"
g++ -O3 -Wall -Wextra -I. ../boost_misc.cpp -o ../boost_misc -Lstage/lib -lboost_filesystem -lboost_url -s -Wl,--gc-sections
*/
/* generate UUID (header-only) */
#include <boost/lexical_cast.hpp>
@darealshinji
darealshinji / zelotes-c12-data.txt
Created December 27, 2023 01:42
Zelotes C-12 Gaming USB Mouse data
#define USB_VENDOR_ID 0x12c9
#define USB_PRODUCT_ID 0x1028
Class-Specific Request (DOWN)
Destination: Interface, Index 2
Reserved Bits: 34
Request: 0x9
Value: 0x300
@darealshinji
darealshinji / glibc-version.c
Last active October 27, 2023 22:54
find the highest version GLIBC_* symbol in a file or directory
/* Public Domain code */
/* find the highest version GLIBC_* symbol in a file or directory */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <ctype.h>
#include <elf.h>
#include <fcntl.h>
/***
Copyright (c) 2023 AppImage Community
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
Opt:
-O0 -Od
-O2 -O2 -Ot
-O3 -Ox -Ot
-Os -O1 -Os
-fomit-frame-pointer -Oy
Code gen:
-f[no-]rtti -gr[-]
Patch for coreutils 9.1 to copy a directory with a progress shown.
Better alternative: https://github.com/dmerejkowsky/pycp
--- a/src/copy.c
+++ b/src/copy.c
@@ -1815,16 +1815,80 @@
&& ! overwrite_ok (x, dst_name, dst_dirfd, dst_relname, dst_sb)));
}
+// GPL3, Copyright (C) 2016 Xfennec, CQFD Corp.
+// https://github.com/Xfennec/progress/blob/master/sizes.c
// MIT License
// Copyright (c) 2021 djcj <[email protected]>
// Elf file parsing code was taken from https://github.com/finixbit/elf-parser
// Copyright (c) 2018 finixbit
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights