#!/bin/sh -e

# This script is spawned by s6-overlay-suexec, as the
# first thing in the userland boot process.
# It is run as root even with a USER directive present.
# If USER, then UID and GID hold the uid and gid of the user
# (this is used by s6-chown -U).

prog=/package/admin/s6-overlay/libexec/preinit


# Ensure /run is writable
if test "0$S6_READ_ONLY_ROOT" -ne 0 ; then
  echo "$prog: info: read-only root" 1>&2
  if ! test -d /run ; then
    echo "$prog: fatal: /run is missing or not a directory" 1>&2
    exit 100
  fi
  if : > '/run/test of writability' 2>/dev/null ; then
    echo "$prog: info: writable /run. Remounting exec just in case." 1>&2
    s6-rmrf '/run/test of writability'
    s6-mount -o remount,rw,exec tmpfs /run || :
  else
    echo "$prog: info: creating a tmpfs on /run" 1>&2
    s6-mount -wt tmpfs -o exec,mode=0755 tmpfs /run
  fi
else
  s6-mkdir -p -m 0755 /run
fi
if test "0$UID" -ne 0 ; then
  s6-chown -U -- /run
fi

# Ensure /var/run is a symlink to /run
if test -L /var/run && test "`s6-linkname -f /var/run`" = /run ; then : ; else
  echo "$prog: notice: /var/run is not a symlink to /run, fixing it" 1>&2
  s6-rmrf /var/run
  s6-ln -s /run /var/run
fi

# Clean up in case /run hasn't been wiped or USER has changed
s6-rmrf /run/s6 /run/service /run/uncaught-logs /run/s6-rc*
s6-mkdir -m 0755 /run/s6 /run/service
if test "0$UID" -ne 0 ; then
  s6-chown -U -- /run/s6
  s6-chown -U -- /run/service
fi