feat: ft_linux

.gitattributes

@@ -3,3 +3,7 @@
 *.jpg filter=lfs diff=lfs merge=lfs -text
 *.png filter=lfs diff=lfs merge=lfs -text
 *.jpeg filter=lfs diff=lfs merge=lfs -text
+*.pdf filter=lfs diff=lfs merge=lfs -text
+*.tar filter=lfs diff=lfs merge=lfs -text
+*.xz filter=lfs diff=lfs merge=lfs -text
+*.gz filter=lfs diff=lfs merge=lfs -text

pcc/ft_linux/.gitignore

@@ -0,0 +1,5 @@
+images/
+lfs*.tar.gz
+tooling*.tar.gz
+*.iso*
+

pcc/ft_linux/README.md

@@ -0,0 +1,39 @@
+# LFS
+
+This project is a home-made distro made by following [Linux From Scratch](https://www.linuxfromscratch.org/lfs/).
+This was made as [42](https://42.fr/en/homepage/)'s `ft_linux` project.
+
+## Subject
+
+The subject provided by 42 asks students to implement LFS, and then make some
+changes to the final LFS implementation. I will not be detailing those changes
+here, because 42 is awesome and I don't want to leak the subjects.
+Come to 42 if you want to find out!
+
+## Implementation details
+
+- This distro was made by following [LFS 12.4](https://www.linuxfromscratch.org/lfs/view/12.4/) ([permalink](https://web.archive.org/web/20250922045138/https://www.linuxfromscratch.org/lfs/view/12.4/)) and some parts of BLFS.
+- The "host" distro was actually an Alpine system I set up on another qcow2.
+- The kernel version is 6.16
+
+## What I learned
+
+- 24 cores CPU and 16GB RAM is good, but what gives speed is not running the VM on an USB stick. Learned the hard way.
+- I dreaded compiling the kernel, but it wasn't nearly as bad as compiling GCC 3 times.
+- The more I read documentation, compiled and tested packages, the more I understood why those packages and why they were made this way.
+  - So I would like to ask forgiveness for the gods and goddesses of GNU/Linux who have blessed us with this amazing OS for all the times I complained about how anything worked.
+- Turns out `autoconf` and `automake` are fucking awesome.
+- I now truly understand the need for a deterministic build system, and hence why Nix and Guix exist.
+- Why is Python the only package that has its archive name starting with a capital "P"? (except XML-Parser, but I really want to hate on Python, let's just pretend `XML-Parser-2.47.tar.gz` is spelled in snake case like the rest)
+- LFS team, thank you for taking the time to make the `wget-list` and `md5sums` files.
+  - And thank you for LFS. It rocks.
+  - And thank you for all the little notes and comments, saved me hours of rebuilding.
+- Saying RTFM is a dick move but turns out you do get better by reading docs.
+
+## Submission
+
+Nothing for this project is submitted through a git repo, all is in the VM, so this repository is pointless, except for the cool utility script.
+
+But I did make the repo anyways as you can see, just to brag that I finished LFS. So here we are.
+You can see some screenshots below because of course I took screenshots.
+

pcc/ft_linux/downloads/check_host_deps.sh

@@ -0,0 +1,80 @@
+#!/bin/bash
+# A script to list version numbers of critical development tools
+# If you have tools installed in other directories, adjust PATH here AND
+# in ~lfs/.bashrc (section 4.4) as well.
+LC_ALL=C
+PATH=/usr/bin:/bin
+bail() { echo "FATAL: $1"; exit 1; }
+grep --version > /dev/null 2> /dev/null || bail "grep does not work"
+sed '' /dev/null || bail "sed does not work"
+sort /dev/null || bail "sort does not work"
+ver_check()
+{
+if ! type -p $2 &>/dev/null
+then
+echo "ERROR: Cannot find $2 ($1)"; return 1;
+fi
+v=$($2 --version 2>&1 | grep -E -o '[0-9]+\.[0-9\.]+[a-z]*' | head -n1)
+if printf '%s\n' $3 $v | sort --version-sort --check &>/dev/null
+then
+printf "OK: %-9s %-6s >= $3\n" "$1" "$v"; return 0;
+else
+printf "ERROR: %-9s is TOO OLD ($3 or later required)\n" "$1";
+return 1;
+fi
+}
+ver_kernel()
+{
+  kver=$(uname -r | grep -E -o '^[0-9\.]+')
+if printf '%s\n' $1 $kver | sort --version-sort --check &>/dev/null
+then
+printf "OK: Linux Kernel $kver >= $1\n"; return 0;
+else
+printf "ERROR: Linux Kernel ($kver) is TOO OLD ($1 or later required)\n" "$kver";
+return 1;
+fi
+}
+# Coreutils first because --version-sort needs Coreutils >= 7.0
+ver_check Coreutils sort 8.1 || bail "Coreutils too old, stop"
+ver_check Bash bash 3.2
+ver_check Binutils ld 2.13.1
+ver_check Bison bison 2.7
+ver_check Diffutils diff 2.8.1
+ver_check Findutils find 4.2.31
+ver_check Gawk gawk 4.0.1
+ver_check GCC gcc 5.4
+ver_check "GCC (C++)" g++ 5.4
+ver_check Grep grep 2.5.1a
+ver_check Gzip gzip 1.3.12
+ver_check M4 m4 1.4.10
+ver_check Make make 4.0
+ver_check Patch patch 2.5.4
+ver_check Perl perl 5.8.8
+ver_check Python python3 3.4
+ver_check Sed sed 4.1.5
+ver_check Tar tar 1.22
+ver_check Texinfo texi2any 5.0
+ver_check Xz xz 5.0.0
+ver_kernel 5.4
+if mount | grep -q 'devpts on /dev/pts' && [ -e /dev/ptmx ]
+then echo "OK: Linux Kernel supports UNIX 98 PTY";
+else echo "ERROR: Linux Kernel does NOT support UNIX 98 PTY"; fi
+alias_check() {
+if $1 --version 2>&1 | grep -qi $2
+then printf "OK: %-4s is $2\n" "$1";
+else printf "ERROR: %-4s is NOT $2\n" "$1"; fi
+}
+echo "Aliases:"
+alias_check awk GNU
+alias_check yacc Bison
+alias_check sh Bash
+echo "Compiler check:"
+if printf "int main(){}" | g++ -x c++ -
+then echo "OK: g++ works";
+else echo "ERROR: g++ does NOT work"; fi
+rm -f a.out
+if [ "$(nproc)" = "" ]; then
+echo "ERROR: nproc is not available or it produces empty output"
+else
+echo "OK: nproc reports $(nproc) logical cores are available"
+fi

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pcc/ft_linux/downloads/wget-list

@@ -0,0 +1,95 @@
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+https://github.com//tukaani-project/xz/releases/download/v5.8.1/xz-5.8.1.tar.xz
+https://zlib.net/fossils/zlib-1.3.1.tar.gz
+https://github.com/facebook/zstd/releases/download/v1.5.7/zstd-1.5.7.tar.gz
+https://www.linuxfromscratch.org/patches/lfs/12.4/bzip2-1.0.8-install_docs-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/coreutils-9.7-upstream_fix-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/coreutils-9.7-i18n-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/expect-5.45.4-gcc15-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/glibc-2.42-fhs-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/kbd-2.8.0-backspace-1.patch
+https://www.linuxfromscratch.org/patches/lfs/12.4/sysvinit-3.14-consolidated-1.patch