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#!/bin/sh
set -eu
ROOT_DIR=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
LINUX_VERSION_BIN=${LINUX_VERSION_BIN:-"$ROOT_DIR/out/linux-version"}
TMPDIR=${TMPDIR:-/tmp}
WORKDIR=$(mktemp -d "$TMPDIR/linux-version-test.XXXXXX")
trap 'rm -rf "$WORKDIR"' EXIT INT TERM
fail() {
printf '%s\n' "FAIL: $1" >&2
exit 1
}
assert_eq() {
name=$1
expected=$2
actual=$3
if [ "$expected" != "$actual" ]; then
printf '%s\n' "FAIL: $name" >&2
printf '%s\n' "--- expected ---" >&2
printf '%s\n' "$expected" >&2
printf '%s\n' "--- actual ---" >&2
printf '%s\n' "$actual" >&2
exit 1
fi
}
assert_match() {
name=$1
pattern=$2
text=$3
printf '%s\n' "$text" | grep -Eq "$pattern" || fail "$name"
}
write_os_release() {
root=$1
content=$2
mkdir -p "$root/etc"
printf '%s\n' "$content" >"$root/etc/os-release"
}
[ -x "$LINUX_VERSION_BIN" ] || fail "missing binary: $LINUX_VERSION_BIN"
usage_output=$("$LINUX_VERSION_BIN" -x 2>&1 || true)
assert_match "invalid option should print usage" '^usage: linux-version ' "$usage_output"
too_many_output=$("$LINUX_VERSION_BIN" arg1 arg2 2>&1 || true)
assert_match "extra operands should print usage" '^usage: linux-version ' "$too_many_output"
jail_output=$("$LINUX_VERSION_BIN" -j demo 2>&1 || true)
assert_eq "unsupported jail option" \
"linux-version: option -j is not supported on Linux" "$jail_output"
root_default="$WORKDIR/root-default"
write_os_release "$root_default" 'NAME=Test Linux
VERSION_ID=42.3
PRETTY_NAME="Test Linux 42.3"'
default_output=$(ROOT="$root_default" "$LINUX_VERSION_BIN")
assert_eq "default output should be userland version" "42.3" "$default_output"
quoted_root="$WORKDIR/root-quoted"
write_os_release "$quoted_root" 'NAME=Quoted Linux
PRETTY_NAME="Quoted Linux 1.0 LTS"'
quoted_output=$(ROOT="$quoted_root" "$LINUX_VERSION_BIN" -u)
assert_eq "quoted PRETTY_NAME fallback" "Quoted Linux 1.0 LTS" "$quoted_output"
malformed_root="$WORKDIR/root-malformed"
write_os_release "$malformed_root" 'NAME=Broken Linux
VERSION_ID="unterminated'
malformed_output=$(ROOT="$malformed_root" "$LINUX_VERSION_BIN" -u 2>&1 || true)
assert_eq "malformed os-release should fail" \
"linux-version: malformed os-release entry 'VERSION_ID' in $malformed_root/etc/os-release" \
"$malformed_output"
missing_root="$WORKDIR/root-missing"
mkdir -p "$missing_root"
missing_output=$(ROOT="$missing_root" "$LINUX_VERSION_BIN" -u 2>&1 || true)
assert_eq "missing os-release should fail" \
"linux-version: unable to locate os-release under '$missing_root'" "$missing_output"
running_expected=
if [ -r /proc/sys/kernel/osrelease ]; then
IFS= read -r running_expected </proc/sys/kernel/osrelease || true
fi
if [ -z "$running_expected" ]; then
running_expected=$(uname -r)
fi
running_output=$("$LINUX_VERSION_BIN" -r)
assert_eq "running kernel release" "$running_expected" "$running_output"
kernel_link_root="$WORKDIR/root-kernel-link"
mkdir -p "$kernel_link_root/boot" "$kernel_link_root/etc"
ln -s ../images/vmlinuz-6.9.7-port "$kernel_link_root/boot/vmlinuz"
write_os_release "$kernel_link_root" 'VERSION_ID=9.1'
kernel_link_output=$(ROOT="$kernel_link_root" "$LINUX_VERSION_BIN" -k)
assert_eq "kernel version from default symlink" "6.9.7-port" "$kernel_link_output"
kernel_modules_root="$WORKDIR/root-kernel-modules"
mkdir -p "$kernel_modules_root/lib/modules/6.8.12-demo/kernel" "$kernel_modules_root/etc"
: >"$kernel_modules_root/lib/modules/6.8.12-demo/modules.dep"
write_os_release "$kernel_modules_root" 'VERSION_ID=6.8-userland'
kernel_modules_output=$(ROOT="$kernel_modules_root" "$LINUX_VERSION_BIN" -k)
assert_eq "kernel version from unique modules tree" "6.8.12-demo" "$kernel_modules_output"
ambiguous_root="$WORKDIR/root-ambiguous"
mkdir -p "$ambiguous_root/lib/modules/6.1.1-a/kernel" "$ambiguous_root/lib/modules/6.1.2-b/kernel"
: >"$ambiguous_root/lib/modules/6.1.1-a/modules.dep"
: >"$ambiguous_root/lib/modules/6.1.2-b/modules.dep"
ambiguous_output=$(ROOT="$ambiguous_root" "$LINUX_VERSION_BIN" -k 2>&1 || true)
assert_match "ambiguous modules tree should fail" \
"^linux-version: unable to determine installed kernel version under '$ambiguous_root': multiple kernel releases found \\(6\\.1\\.1-a, 6\\.1\\.2-b\\)$" \
"$ambiguous_output"
combo_output=$(ROOT="$kernel_link_root" "$LINUX_VERSION_BIN" -kru)
combo_expected=$(printf '%s\n%s\n%s' "6.9.7-port" "$running_expected" "9.1")
assert_eq "combined output order" "$combo_expected" "$combo_output"
printf '%s\n' "PASS"
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