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#!/bin/sh
#
# This program is run by /hurd/init at boot time after the essential
# servers are up. It does some initialization of its own and then
# execs /hurd/init or any other roughly SysV init-compatible program
# to bring up the "userland" parts of a normal system.
#
###
### Where to find programs, etc.
###
PATH=/bin:/sbin
export PATH
umask 022
# If we lose badly, try to exec each of these in turn.
fallback_shells='/bin/bash /bin/sh /bin/dash /bin/csh /bin/ash /bin/shd'
# Shell used for normal single-user startup.
SHELL=/bin/sh
# The init program to call.
#
# Can be overridden using init=something in the kernel command line.
init=/hurd/init
###
# If we get a SIGLOST, attempt to reopen the console in case
# our console ports were revoked. This lets us print messages.
reopen_console ()
{
exec 1>/dev/console 2>&1 || exit 3
}
trap 'reopen_console' 32 # SIGLOST = server died on GNU
# Call this when we are losing badly enough that we want to punt normal
# startup entirely. We exec a single-user shell, so we will not come back
# here. The only way to get to multi-user from that shell will be
# explicitly exec this script or something like that.
singleuser ()
{
test $# -eq 0 || echo "$0: $*"
for try in ${fallback_shells}; do
SHELL=${try}
exec ${SHELL}
done
exit 127
}
# Print a newline.
echo
# See whether pflocal is set up already, and do so if not (install case)
#
# Normally this should be the case, but we better make sure since
# without the pflocal server, pipe(2) does not work.
if ! test -e /servers/socket/1 && command -v settrans >/dev/null ; then
# The root filesystem should be read-only at this point.
if fsysopts / --update --writable ; then
settrans -c /servers/socket/1 /hurd/pflocal
else
singleuser "Failed to create /servers/socket/1."
fi
fi
# We expect to be started by console-run, which gives us no arguments and
# puts FALLBACK_CONSOLE=file-name in the environment if our console is
# other than a normal /dev/console.
if [ "${FALLBACK_CONSOLE+set}" = set ]; then
singleuser "Running on fallback console ${FALLBACK_CONSOLE}"
fi
###
### Normal startup procedures
###
# Parse the multiboot command line. We only pay attention to -s and -f.
flags=
single=
while [ $# -gt 0 ]; do
arg="$1"
shift
case "$arg" in
--*) ;;
init=*)
eval "${arg}"
;;
*=*) ;;
-*)
flags="${flags}${arg#-}"
;;
'single')
single="-s"
;;
'fastboot'|'emergency')
;;
esac
done
# Check boot flags.
case "$flags" in
*s*)
single="-s" # force single-user
;;
esac
# Start the default pager. It will bail if there is already one running.
/hurd/mach-defpager
# This is necessary to make stat / return the correct device ids.
fsysopts / --update --readonly
# Finally, start the actual SysV init.
exec ${init} ${single} -a
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