split script in multiple files, reassembled through build.sh

src/libs/001_core_header.sh

@@ -0,0 +1,51 @@
+#! /bin/sh
+# SPDX-License-Identifier: GPL-3.0-only
+# vim: set ts=4 sw=4 sts=4 et:
+# shellcheck disable=SC2317,SC2329,SC3043
+#
+# Spectre & Meltdown checker
+#
+# Check for the latest version at:
+# https://github.com/speed47/spectre-meltdown-checker
+# git clone https://github.com/speed47/spectre-meltdown-checker.git
+# or wget https://meltdown.ovh -O spectre-meltdown-checker.sh
+# or curl -L https://meltdown.ovh -o spectre-meltdown-checker.sh
+#
+# Stephane Lesimple
+#
+VERSION='0.46+'
+
+# --- Common paths and basedirs ---
+readonly VULN_SYSFS_BASE="/sys/devices/system/cpu/vulnerabilities"
+readonly DEBUGFS_BASE="/sys/kernel/debug"
+readonly SYS_MODULE_BASE="/sys/module"
+readonly CPU_DEV_BASE="/dev/cpu"
+readonly BSD_CPUCTL_DEV_BASE="/dev/cpuctl"
+
+trap 'exit_cleanup' EXIT
+trap 'pr_warn "interrupted, cleaning up..."; exit_cleanup; exit 1' INT
+# Clean up temporary files and undo module/mount side effects on exit
+exit_cleanup() {
+    local saved_ret
+    saved_ret=$?
+    # cleanup the temp decompressed config & kernel image
+    [ -n "${g_dumped_config:-}" ] && [ -f "$g_dumped_config" ] && rm -f "$g_dumped_config"
+    [ -n "${g_kerneltmp:-}" ] && [ -f "$g_kerneltmp" ] && rm -f "$g_kerneltmp"
+    [ -n "${g_kerneltmp2:-}" ] && [ -f "$g_kerneltmp2" ] && rm -f "$g_kerneltmp2"
+    [ -n "${g_mcedb_tmp:-}" ] && [ -f "$g_mcedb_tmp" ] && rm -f "$g_mcedb_tmp"
+    [ -n "${g_intel_tmp:-}" ] && [ -d "$g_intel_tmp" ] && rm -rf "$g_intel_tmp"
+    [ -n "${g_linuxfw_tmp:-}" ] && [ -f "$g_linuxfw_tmp" ] && rm -f "$g_linuxfw_tmp"
+    [ "${g_mounted_debugfs:-}" = 1 ] && umount "$DEBUGFS_BASE" 2>/dev/null
+    [ "${g_mounted_procfs:-}" = 1 ] && umount "$g_procfs" 2>/dev/null
+    [ "${g_insmod_cpuid:-}" = 1 ] && rmmod cpuid 2>/dev/null
+    [ "${g_insmod_msr:-}" = 1 ] && rmmod msr 2>/dev/null
+    [ "${g_kldload_cpuctl:-}" = 1 ] && kldunload cpuctl 2>/dev/null
+    [ "${g_kldload_vmm:-}" = 1 ] && kldunload vmm 2>/dev/null
+    exit "$saved_ret"
+}
+
+# if we were git clone'd, adjust VERSION
+if [ -d "$(dirname "$0")/.git" ] && command -v git >/dev/null 2>&1; then
+    g_describe=$(git -C "$(dirname "$0")" describe --tags --dirty 2>/dev/null)
+    [ -n "$g_describe" ] && VERSION=$(echo "$g_describe" | sed -e s/^v//)
+fi