#!/bin/sh
# gen.sh -- run ON THE GUEST. Concatenates the harness around a verbatim
# copy of /usr/src/sys/bus/cam/scsi/scsi_sa.c and registers it as a
# standard kernel source file.
#
# Notes:
#  - the generated file lives in bus/cam/scsi/ so scsi_sa.c's relative
#    quote-includes ("../cam.h", "scsi_all.h", ...) resolve unchanged;
#  - scsi_sa.c includes <opt_sa.h>, which config(8) only generates when
#    the sa device is configured; this kernel does not configure it, so
#    an empty opt_sa.h is provided in /usr/src/sys (guest build tree
#    only -- the audit-side sys/ tree is never touched) and scsi_sa.c's
#    built-in #ifndef defaults apply.
set -e
cd /usr/src/sys
cat bus/cam/scsi/df_pre.c bus/cam/scsi/scsi_sa.c bus/cam/scsi/df_post.c \
    > bus/cam/scsi/df226x_harness.c
grep -q 'df226x_harness' conf/files || \
    printf 'bus/cam/scsi/df226x_harness.c\t\tstandard\n' >> conf/files
[ -f opt_sa.h ] || : > opt_sa.h
# The kernel config compiles scsi_sa.c as scsi_sa.o ("device sa"); the
# verbatim copy inside the harness TU would duplicate its public
# symbols at link time.  Drop the kernel's own copy (the harness TU
# contains the complete driver).  No tape hardware exists on this
# guest; the audit-side sys/ tree is never touched.
sed -i '' -E 's/^device([[:space:]]+sa[[:space:]]*# Sequential Access.*)/#device\1/' \
    config/X86_64_GENERIC
grep -n 'sa.*Sequential Access' config/X86_64_GENERIC || true
echo "generated bus/cam/scsi/df226x_harness.c" \
    "($(wc -l < bus/cam/scsi/df226x_harness.c) lines)"