repo/core/busybox/build

#!/bin/sh -e

# Build and install regular busybox.
# This excludes utilities which require 'suid' to function.
make
make CONFIG_PREFIX="$1/usr" install

# Rename the binary temporarily.
mv "$1/usr/bin/busybox" "$1/usr/bin/busybox-nosuid"

# Build and install suid busybox.
# This _only_ includes utlities which require 'suid' to function.
cp -f .config-suid .config
make
make CONFIG_PREFIX="$1/usr" install

# Aptly name the busybox binaries.
mv "$1/usr/bin/busybox"        "$1/usr/bin/busybox-suid"
mv "$1/usr/bin/busybox-nosuid" "$1/usr/bin/busybox"

# Install the non-suid symlinks.
"$1/usr/bin/busybox" --list | while read -r bin; do
    ln -s busybox "$1/usr/bin/$bin"
done

# Install the suid symlinks.
"$1/usr/bin/busybox-suid" --list | while read -r bin; do
    ln -s busybox-suid "$1/usr/bin/$bin"
done

# Set suid on busybox suid.
chmod +s "$1/usr/bin/busybox-suid"

# Build and install a statically compiled busybox.
# This is useful for instances where the system is broken
# and for making an initramfs.
#
# The sleep is required so that 'make' doesn't skip the
# changes due to its 'mtime' checks.
make defconfig
sleep 1
sed -i'' "s/.*CONFIG_STATIC.*/CONFIG_STATIC=y/" .config
make
install -Dm755 busybox "$1/usr/lib/busybox"

# Install runit services.
install -Dm755 acpid.run           "$1/etc/sv/acpid/run"
install -Dm755 crond.run           "$1/etc/sv/crond/run"
install -Dm755 syslogd.run         "$1/etc/sv/syslogd/run"
ln -s /run/runit/supervise.acpid   "$1/etc/sv/acpid/supervise"
ln -s /run/runit/supervise.crond   "$1/etc/sv/crond/supervise"
ln -s /run/runit/supervise.syslogd "$1/etc/sv/syslogd/supervise"