- Zero dependencies
- Zero heap allocations
- Unrolled and inlineable
- Sensibly debuggable using line-oriented breakpoints
- Buffer-oriented functions usable in embedded and kernel development
- Optional 128-bit integer support where
__int128andunsigned __int128are available
skull-squadron
/ cmdline.txt
Created
April 8, 2024 05:17
Kernel config diff between CentOS 9-stream (5.14.0-430.el9.x86_64) and Oracle 9.3 UEK (5.15.0-204.147.6.3.el9uek.x86_64)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| (HOST1={{hostname1}} HOST2={{hostname2}}; diff -u <(ssh "$HOST1" 'sed "/CONFIG_/!d;s/^# //" /boot/config-$(uname -r) | sort') <(ssh "$HOST2" 'sed "/CONFIG_/!d;s/^# //" /boot/config-$(uname -r) | sort')) |
skull-squadron
/ ssh-regen-moduli
Last active
April 8, 2024 10:39
Regenerate /etc/ssh/moduli for modern openssh
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env bash | |
| set -euo pipefail | |
| # This script supports openssh 8.2+ | |
| (( ! UID )) || exec /usr/bin/sudo "$0" "$@" | |
| var=${0//[^a-zA-Z0-9_]/_} | |
| eval [ "\${$var-}" ] || exec /usr/bin/env ${var}=1 /usr/bin/flock -en "$0" "$0" "$@" | |
| bits=${1:-4096} | |
| min_bits=$((bits - 1)) | |
| moduli::generate() { |
skull-squadron
/ figsample
Last active
April 9, 2024 05:14
Figlet sample viewer (require crc32 from Perl)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env bash | |
| # | |
| # | |
| # _______ _____ ______ _______ _______ _______ _____ _______ | |
| # |______ | | ____ |______ |_____| | | | |_____] | |______ | |
| # | __|__ |_____| ______| | | | | | | |_____ |______ | |
| # | |
| # | |
| # ___ ___ ___ | |
| # |
skull-squadron
/ Makefile
Last active
April 9, 2024 04:57
Find a crc32 hash collision to embed in a file (requires zlib)
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| CFLAGS ?= -std=c99 -D_FORTIFY_SOURCE=2 -Wall -Wextra -Wpedantic -Wformat=2 -flto -O3 -DNEBUG | |
| build: find-crc32-worker | |
| find-crc32-worker: find-crc32-worker.c Makefile | |
| $(CC) $(CFLAGS) -lz $< -o $@ | |
| clean: | |
| rm -f find-crc32-worker |
skull-squadron
/ force-replace-docker-binaries-with-unsupported-generic-ones
Created
April 9, 2024 05:57
Oracle Linux and Fedora: Replace docker YUM/RPM binaries with generic ones from the interwebs without hash/sig checking or confirmation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env bash | |
| # Needed for btrfs support on RH/Fedora-derived platforms | |
| set -Eeuo pipefail | |
| files=(containerd containerd-shim-runc-v2 ctr docker dockerd docker-init docker-proxy runc) | |
| url_prefix="https://download.docker.com/linux/static/stable/$(/bin/arch)/" | |
| ua='Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.36' | |
| tarball=$(/bin/curl -fsSL -A "$ua" "$url_prefix" | /bin/grep -Eo 'docker-[0-9.]+tgz' | /bin/sort -Vur | /bin/head -1) | |
| url="${url_prefix}${tarball}" |
skull-squadron
/ README.md
Last active
May 10, 2024 00:30
C portable C99 byte deser of sized integer types (instead of BSD socket network functions)
skull-squadron
/ mass-rename
Created
May 30, 2024 02:36
mass-rename files and change contents with sed
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #!/usr/bin/env bash | |
| [[ "${BASH_VERSINFO[0]}" -ge 4 ]] || { | |
| echo >&2 'Requires bash >= 4' | |
| exit 1 | |
| } | |
| set -Eeuo pipefail | |
| [ -z "${DEBUG-}" ] || set -x | |
| if [ "$#" = 0 ]; then | |
| cat >&2 << 'USAGE' |
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| #[macro_export] | |
| macro_rules! new_lazy_static { | |
| ($(#[$a:meta])* $v:vis fn $i:ident() -> &$t:ty $b:block $($rest:tt)*) => { | |
| __new_lazy_static_inner!($(#[$a])*, $v, $i, Box<&$t>, $t, Box::new($b)); | |
| new_lazy_static!($($rest)*); | |
| }; | |
| ($(#[$a:meta])* $v:vis fn $i:ident() -> $t:ty $b:block $($rest:tt)*) => { | |
| __new_lazy_static_inner!($(#[$a])*, $v, $i, $t, $t, $b); | |
| new_lazy_static!($($rest)*); | |
| }; |
skull-squadron
/ README.md
Created
May 31, 2024 05:52
How to un/install an RPM without running scriplets
dnf --setopt=tsflags=noscripts install ...