93 lines
3.3 KiB
Bash
Executable File
93 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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# ============================================================================
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# DarkForge Linux — Phase 0, Chapter 7: Chroot Environment Setup
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# ============================================================================
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# Purpose: Prepare the virtual filesystems and enter the chroot environment.
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# This script must be run as ROOT on the host system. It mounts
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# /dev, /proc, /sys, /run into the LFS tree and enters the chroot.
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# Inputs: LFS environment variable
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# Outputs: Running chroot environment with virtual filesystems mounted
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# Assumes: All Chapter 5+6 scripts (001-022) complete successfully
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# Ref: LFS 13.0 §7.2-7.4
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# ============================================================================
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set -euo pipefail
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LFS="${LFS:-/mnt/darkforge}"
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echo "=== DarkForge: Setting up chroot environment ==="
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# Verify we're running as root
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if [ "$(id -u)" -ne 0 ]; then
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echo "ERROR: This script must be run as root."
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exit 1
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fi
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# Change ownership from lfs user to root
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# (the chroot tools now belong to the system)
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chown -R root:root "${LFS}"/{usr,lib,var,etc,bin,sbin,tools} 2>/dev/null || true
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case $(uname -m) in
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x86_64) chown -R root:root "${LFS}/lib64" ;;
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esac
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# --- Create essential directory structure ------------------------------------
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mkdir -pv "${LFS}"/{dev,proc,sys,run}
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mkdir -pv "${LFS}"/{boot,home,mnt,opt,srv}
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mkdir -pv "${LFS}/etc"/{opt,sysconfig}
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mkdir -pv "${LFS}/lib/firmware"
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mkdir -pv "${LFS}/media"/{floppy,cdrom}
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mkdir -pv "${LFS}/usr"/{,local/}{include,src}
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mkdir -pv "${LFS}/usr/local"/{bin,lib,sbin}
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mkdir -pv "${LFS}/usr"/{,local/}share/{color,dict,doc,info,locale,man}
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mkdir -pv "${LFS}/usr"/{,local/}share/{misc,terminfo,zoneinfo}
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mkdir -pv "${LFS}/usr"/{,local/}share/man/man{1..8}
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mkdir -pv "${LFS}/var"/{cache,local,log,mail,opt,spool}
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mkdir -pv "${LFS}/var/lib"/{color,misc,locate}
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ln -sfv /run "${LFS}/var/run"
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ln -sfv /run/lock "${LFS}/var/lock"
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install -dv -m 0750 "${LFS}/root"
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install -dv -m 1777 "${LFS}/tmp" "${LFS}/var/tmp"
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# --- Mount virtual kernel filesystems ----------------------------------------
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# These expose the host kernel's interfaces inside the chroot
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# Bind-mount /dev from host (gives us device nodes)
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mount -v --bind /dev "${LFS}/dev"
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# Mount devpts for pseudo-terminals
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mount -vt devpts devpts -o gid=5,mode=0620 "${LFS}/dev/pts"
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# Mount /proc (process info filesystem)
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mount -vt proc proc "${LFS}/proc"
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# Mount /sys (sysfs — kernel objects)
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mount -vt sysfs sysfs "${LFS}/sys"
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# Mount /run (tmpfs for runtime data)
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mount -vt tmpfs tmpfs "${LFS}/run"
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# Handle /dev/shm — some systems make it a symlink
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if [ -h "${LFS}/dev/shm" ]; then
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install -v -d -m 1777 "${LFS}/$(readlink "${LFS}/dev/shm")"
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else
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mount -vt tmpfs -o nosuid,nodev tmpfs "${LFS}/dev/shm"
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fi
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echo ""
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echo "=== Virtual filesystems mounted ==="
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echo ""
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echo "To enter the chroot, run:"
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echo ""
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echo " chroot \"${LFS}\" /usr/bin/env -i \\"
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echo " HOME=/root \\"
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echo " TERM=\"\${TERM}\" \\"
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echo " PS1='(darkforge chroot) \\u:\\w\\\$ ' \\"
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echo " PATH=/usr/bin:/usr/sbin:/tools/bin \\"
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echo " MAKEFLAGS=\"-j32\" \\"
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echo " /bin/bash --login"
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echo ""
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echo "Or run all chroot scripts automatically:"
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echo " bash ${LFS}/sources/toolchain-scripts/023a-chroot-build-all.sh"
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