From 54d7bde90161b3e01a5e15260d08e79f39096fec Mon Sep 17 00:00:00 2001
From: Cem Keylan <cem@ckyln.com>
Date: Wed, 18 Dec 2019 21:04:42 +0300
Subject: add makefile

---
 rc.boot | 177 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 177 insertions(+)
 create mode 100755 rc.boot

(limited to 'rc.boot')

diff --git a/rc.boot b/rc.boot
new file mode 100755
index 0000000..b5b8782
--- /dev/null
+++ b/rc.boot
@@ -0,0 +1,177 @@
+#!/bin/sh
+
+log() { printf '\033[1;36m=>\033[m\033[1m %s\n' "$@" ;}
+
+welcome() { printf '\033[1;36m=>\033[m\033[1m Welcome to\033[35m Carbs Linux\033[m\033[1m!\n' ;}
+
+error() { printf '\033[1m\033[31m=> ERROR: %s\033[m\n' "$@" ;}
+
+mnt() {
+    mountpoint -q "$1" || {
+        dir=$1
+        shift
+        mount "$@" "$dir"
+    }
+}
+
+emergency_shell() {
+    error \
+        "Cannot continue init due to errors above, starting emergency shell" \
+        "When ready, type 'exit' to continue the boot."
+
+    /bin/sh -l
+}
+
+main() {
+    PATH=/usr/bin:/usr/sbin
+    old_ifs=$IFS
+    set -f
+
+    welcome
+
+    log "Mounting pseudo filesystems..."; {
+        mnt /proc -o nosuid,noexec,nodev    -t proc     proc
+        mnt /sys  -o nosuid,noexec,nodev    -t sysfs    sys
+        mnt /run  -o mode=0755,nosuid,nodev -t tmpfs    run
+        mnt /dev  -o mode=0755,nosuid       -t devtmpfs dev
+
+        mkdir -pm 0755 /run/runit \
+                       /run/lvm   \
+                       /run/user  \
+                       /run/lock  \
+                       /run/log   \
+                       /dev/pts   \
+                       /dev/shm
+
+        mnt /dev/pts -o mode=0620,gid=5,nosuid,noexec -nt devpts     devpts
+        mnt /dev/shm -o mode=1777,nosuid,nodev        -nt tmpfs      shm
+    }
+
+    log "Starting eudev..."; {
+        command -v udevd >/dev/null && {
+            udevd --daemon
+            udevadm trigger --action=add --type=subsystems
+            udevadm trigger --action=add --type=devices
+            udevadm settle
+        }
+    }
+
+    log "Remounting rootfs as ro..."; {
+        mount -o remount,ro / || emergency_shell
+    }
+
+    log "Activating encrypted devices (if any exist)..."; {
+        [ -e /etc/crypttab ] && [ -x /bin/cryptsetup ] && {
+            exec 3<&0
+
+            while read -r name dev pass opts err; do
+                [ "${name##\#*}" ] || continue
+
+                # Break on invalid crypttab.
+                [ "$err" ] && {
+                    printf 'error: A valid crypttab has only 4 columns.\n'
+                    break
+                }
+
+                # Turn 'UUID=*' lines into device names.
+                [ "${dev##UUID*}" ] || dev=$(blkid -l -o device -t "$dev")
+
+                # Parse options by turning list into a pseudo array.
+                IFS=,
+                set -- $opts
+                IFS=$old_ifs
+
+                copts="cryptsetup luksOpen"
+
+                # Create an argument list (no other way to do this in sh).
+                for opt; do case $opt in
+                    discard)            copts="$copts --allow-discards" ;;
+                    readonly|read-only) copts="$copts -r" ;;
+                    tries=*)            copts="$copts -T ${opt##*=}" ;;
+                esac; done
+
+                # If password is 'none', '-' or empty ask for it.
+                case $pass in
+                    none|-|"") $copts "$dev" "$name" <&3 ;;
+                    *)         $copts -d "$pass" "$dev" "$name" ;;
+                esac
+            done < /etc/crypttab
+
+            exec 3>&-
+
+            [ "$copts" ] && [ -x /bin/vgchance ] && {
+                log "Activating LVM devices for dm-crypt..."
+                vgchange --sysinit -a y || emergency_shell
+            }
+        }
+    }
+
+    log "Checking filesystems..."; {
+        fsck -ATat noopts=_netdev
+        [ $? -gt 1 ] && emergency_shell
+    }
+
+    log "Mounting rootfs rw..."; {
+        mount -o remount,rw / || emergency_shell
+    }
+
+    log "Mounting all local filesystems..."; {
+        mount -at nosysfs,nonfs,nonfs4,nosmbfs,nocifs -O no_netdev ||
+            emergency_shell
+    }
+
+    log "Enabling swap..."; {
+        swapon -a || emergency_shell
+    }
+
+    log "Seeding random..."; {
+        if [ -f /var/random.seed ]; then
+            cat /var/random.seed > /dev/urandom
+        else
+            log "This may hang."
+            log "Mash the keyboard to generate entropy..."
+
+            dd count=1 bs=512 if=/dev/random of=/var/random.seed
+        fi
+    }
+
+    log "Setting up loopback..."; {
+        ip link set up dev lo
+    }
+
+    log "Setting hostname..."; {
+        read -r hostname < /etc/hostname
+        printf '%s\n' "${hostname:-carbs-linux}" > /proc/sys/kernel/hostname
+    } 2>/dev/null
+
+    log "Getting keymap settings..."; {
+    	[ -r "/etc/keymap" ] && . /etc/keymap
+	[ -n "$KEYMAP" ] && loadkmap < "$KEYMAP"
+    }
+
+    log "Loading sysctl settings..."; {
+        find /run/sysctl.d \
+             /etc/sysctl.d \
+             /usr/local/lib/sysctl.d \
+             /usr/lib/sysctl.d \
+             /lib/sysctl.d \
+             /etc/sysctl.conf \
+             -name \*.conf -type f 2>/dev/null \
+        | while read -r conf; do
+            seen="$seen ${conf##*/}"
+
+            case $seen in
+                *" ${conf##*/} "*) ;;
+                *) printf '%s\n' "* Applying $conf ..."
+                   sysctl -p "$conf" ;;
+            esac
+        done
+    }
+
+    command -v udevd >/dev/null &&
+        udevadm control --exit
+
+    log "Boot stage complete..."
+}
+
+main
-- 
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