mirror of
https://github.com/jmcorgan/fips.git
synced 2026-10-05 11:08:25 +00:00
Report inputs the glibc floor check could not examine as unchecked
check-glibc-floor.sh counted a missing path, a file that is not an ELF object and a .deb with no ELF executables as floor failures, so each exited 1 with "A binary above the floor installs cleanly and then fails to start" and the advice to rebuild in the container. Passing a release tarball, which is the usual mistake, therefore read as a broken release when nothing had been examined. A .deb that dpkg-deb could not unpack killed the script under set -e with no summary, leaving later arguments unexamined. Those inputs are now recorded as "could not check" with the reason, and listed at the end. A tarball's reason says to unpack it and pass its binaries. Exit status is 1 only when a binary is above the floor (still listing anything unchecked), 2 when anything could not be examined, and 0 only when every input was examined and passed. Neither caller branches on the status, and both stop on 1 or 2 as before. Two setup failures also exited 1: a missing packaging/build-floor.env ended the run through set -e when it was sourced, and an empty FIPS_GLIBC_FLOOR ended it through the ":?" expansion. The env file is now read only after a readable-file check, and an empty floor is caught by an explicit test; both exit 2 with a message saying there is no floor to check against. The file's shellcheck source directive now resolves from the script's directory, so shellcheck -x run from the repository root no longer reports SC1091. The floor check runs only at release time, so a regression in how it reports would surface on a release day. testing/glibc-floor/test.sh builds its inputs at run time from the host's own true executable (a text file, a tarball holding the binary, a missing path, an unreadable file, a corrupt .deb, a .deb holding only a script, and a .deb holding the binary), sets the floor explicitly in every case, and asserts the exit status, the "could not check" listing and the presence or absence of the rebuild advice. Scratch copies of the check cover a missing build-floor.env, an empty floor, a file that declares none, and one whose file supplies a floor. The test exits 2 rather than passing when readelf, dpkg-deb or a dynamic true is missing. ci-local.sh runs it beside the Debian version check, and ci.yml's static job runs the same script.
This commit is contained in:
@@ -106,6 +106,11 @@ jobs:
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# reports. Kept in step with ci-local.sh's run_nextest_flaky by hand.
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- name: Check the flaky-test reporter against its fixtures
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run: bash testing/nextest-flaky/test.sh
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# The glibc floor check's cases, built from the host's own true
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# executable. Not a matrix suite, so it is kept in step with
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# ci-local.sh's run_glibc_floor by hand.
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- name: Check the glibc floor check against its cases
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run: bash testing/glibc-floor/test.sh
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fmt:
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name: Format check
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@@ -16,17 +16,37 @@
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# Anything else is treated as a single ELF binary.
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#
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# Reads the floor from packaging/build-floor.env unless FIPS_GLIBC_FLOOR is set.
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#
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# Exit 0 = every input was examined and none is above the floor. Exit 1 = a
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# binary needs a newer glibc than the floor. Exit 2 = an input could not be
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# examined (missing, not an ELF object, a .deb that would not unpack or holds
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# no binaries), or the check could not run at all; never treated as a pass,
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# and never reported as a binary above the floor.
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
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# A missing or empty floor means the check cannot run, so it exits 2 here
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# rather than letting `set -e` or a `:?` expansion end the run with status 1,
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# which callers would read as a binary above the floor.
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FLOOR_ENV="$REPO_ROOT/packaging/build-floor.env"
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if [ -z "${FIPS_GLIBC_FLOOR:-}" ]; then
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# shellcheck source=../packaging/build-floor.env
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. "$REPO_ROOT/packaging/build-floor.env"
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[ -r "$FLOOR_ENV" ] || {
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echo "check-glibc-floor: cannot read $FLOOR_ENV and FIPS_GLIBC_FLOOR is not set;" >&2
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echo " there is no floor to check against." >&2
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exit 2
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}
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# shellcheck source-path=SCRIPTDIR source=../packaging/build-floor.env
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. "$FLOOR_ENV"
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fi
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FLOOR="${FIPS_GLIBC_FLOOR:?no floor declared}"
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if [ -z "${FIPS_GLIBC_FLOOR:-}" ]; then
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echo "check-glibc-floor: $FLOOR_ENV declares no FIPS_GLIBC_FLOOR;" >&2
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echo " there is no floor to check against." >&2
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exit 2
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fi
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FLOOR="$FIPS_GLIBC_FLOOR"
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for tool in readelf dpkg dpkg-deb; do
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command -v "$tool" >/dev/null 2>&1 || {
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@@ -65,6 +85,18 @@ max_glibc_need() {
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FAILED=0
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CHECKED=0
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UNCHECKED=0
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UNCHECKED_LIST=()
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# unchecked <label> <reason>: records an input this run could not examine. It
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# is kept apart from FAILED because the remedy differs: an input that was never
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# read says nothing about the floor, and the above-the-floor advice would send
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# the reader to rebuild a package that may be fine.
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unchecked() {
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echo " UNCHECKED $1: could not check ($2)" >&2
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UNCHECKED_LIST+=("$1: $2")
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UNCHECKED=$((UNCHECKED + 1))
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}
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is_elf() { readelf -hW "$1" >/dev/null 2>&1; }
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@@ -78,8 +110,12 @@ check_binary() {
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CHECKED=$((CHECKED + 1))
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return
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fi
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echo " ERROR $label is not a readable ELF object" >&2
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FAILED=$((FAILED + 1))
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case "$label" in
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*.tar.gz|*.tgz|*.tar|*.tar.*)
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unchecked "$label" "not a readable ELF object; unpack it and pass its binaries" ;;
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*)
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unchecked "$label" "not a readable ELF object" ;;
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esac
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return
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fi
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CHECKED=$((CHECKED + 1))
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@@ -96,11 +132,14 @@ check_deb() {
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tmp=$(mktemp -d)
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# shellcheck disable=SC2064
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trap "rm -rf '$tmp'" RETURN
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dpkg-deb -x "$deb" "$tmp"
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if ! dpkg-deb -x "$deb" "$tmp"; then
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unchecked "$(basename "$deb")" "dpkg-deb could not unpack it"
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return
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fi
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# A package legitimately ships executable shell scripts alongside its
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# binaries -- fips-dns-setup and its teardown are two -- so filter to ELF
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# objects rather than treating a script as an unreadable binary. A .deb
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# with no ELF object at all is still an error: it means the glob or the
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# with no ELF object at all is still not a pass: it means the glob or the
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# layout moved and this check examined nothing.
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local found=0 f
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while IFS= read -r -d '' f; do
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@@ -109,8 +148,7 @@ check_deb() {
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check_binary "$f" "$(basename "$deb"):$(basename "$f")"
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done < <(find "$tmp" -type f -perm -u+x -print0)
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if [ "$found" -eq 0 ]; then
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echo " ERROR $(basename "$deb") contains no ELF executables" >&2
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FAILED=$((FAILED + 1))
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unchecked "$(basename "$deb")" "contains no ELF executables"
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fi
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}
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@@ -121,27 +159,53 @@ check_deb() {
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echo "=== glibc floor check (declared floor: $FLOOR) ==="
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for arg in "$@"; do
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[ -e "$arg" ] || { echo " ERROR $arg does not exist" >&2; FAILED=$((FAILED + 1)); continue; }
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[ -e "$arg" ] || { unchecked "$arg" "does not exist"; continue; }
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case "$arg" in
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*.deb) check_deb "$arg" ;;
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*) check_binary "$arg" "$(basename "$arg")" ;;
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esac
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done
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# Nothing examined is a failure, not a pass. An argument list that matched no
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# binary means the caller's glob went stale, and reporting that as green is how
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# a guard quietly stops guarding.
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if [ "$CHECKED" -eq 0 ] && [ "$FAILED" -eq 0 ]; then
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# print_unchecked: lists the inputs this run could not examine, if any.
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print_unchecked() {
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[ "$UNCHECKED" -gt 0 ] || return 0
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echo " Not checked:" >&2
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local entry
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for entry in "${UNCHECKED_LIST[@]}"; do
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echo " $entry" >&2
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done
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}
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# A real floor failure is the stronger signal, so it decides the status even
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# when other inputs went unchecked; those are still listed.
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if [ "$FAILED" -ne 0 ]; then
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echo "check-glibc-floor: $FAILED binary(ies) above the floor across $CHECKED checked, $UNCHECKED input(s) not checked." >&2
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echo " A binary above the floor installs cleanly and then fails to start." >&2
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echo " Build through packaging/debian/build-deb-container.sh, which pins" >&2
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echo " the build image to the oldest supported distribution." >&2
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print_unchecked
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exit 1
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fi
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# An input that could not be examined is not a pass. This is also where a
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# stale caller glob lands: an unexpanded pattern such as "$UNPACK"/*/fips
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# arrives as a path that does not exist, and reporting that as green is how a
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# guard quietly stops guarding.
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if [ "$UNCHECKED" -ne 0 ]; then
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if [ "$CHECKED" -eq 0 ]; then
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echo "check-glibc-floor: could not check $UNCHECKED input(s) and examined no binaries." >&2
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else
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echo "check-glibc-floor: could not check $UNCHECKED input(s); nothing was found above the floor in the $CHECKED binaries checked." >&2
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fi
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print_unchecked
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exit 2
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fi
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# Backstop: every argument raises CHECKED, FAILED or UNCHECKED, and an empty
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# argument list is refused above, so this is not expected to be reached.
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if [ "$CHECKED" -eq 0 ]; then
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echo "check-glibc-floor: examined no binaries; refusing to report a pass." >&2
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exit 2
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fi
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if [ "$FAILED" -ne 0 ]; then
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echo "check-glibc-floor: $FAILED problem(s) across $CHECKED binaries." >&2
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echo " A binary above the floor installs cleanly and then fails to start." >&2
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echo " Build through packaging/debian/build-deb-container.sh, which pins" >&2
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echo " the build image to the oldest supported distribution." >&2
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exit 1
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fi
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echo "=== glibc floor check passed ($CHECKED binaries, all at or below $FLOOR) ==="
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@@ -1637,6 +1637,17 @@ run_nextest_flaky() {
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record "nextest-flaky" $rc
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}
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# check-glibc-floor.sh's cases: an input it cannot examine reports "could not
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# check" with exit 2, and only a binary above the floor gets exit 1 and the
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# rebuild advice. Static, a few seconds, and builds its inputs from the host's
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# own true executable.
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run_glibc_floor() {
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local rc=0
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info "[glibc-floor] Checking the glibc floor check against its cases"
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bash "$SCRIPT_DIR/glibc-floor/test.sh" || rc=$?
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record "glibc-floor" $rc
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}
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# ── Main ───────────────────────────────────────────────────────────────────
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main() {
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@@ -1662,6 +1673,7 @@ main() {
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run_wait_converge
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run_deb_version
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run_nextest_flaky
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run_glibc_floor
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if [[ "$TEST_ONLY" == true ]]; then
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run_tests
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Executable
+195
@@ -0,0 +1,195 @@
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#!/bin/bash
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# ── Cases for check-glibc-floor.sh ──────────────────────────────────────────
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# The floor check runs at release time, on artifacts nobody re-reads, so how it
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# reports matters as much as what it finds. An input it cannot examine (a
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# missing path, a file that is not an ELF object such as an unextracted
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# tarball, a corrupt or binary-less .deb) must come out as "could not check"
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# with exit 2, never as a binary above the floor: that advice sends the reader
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# to rebuild a package that was never examined. A binary that really is above
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# the floor must still exit 1 with the advice, even beside unchecked inputs. A
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# floor that is missing or empty means the check cannot run at all, which is
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# exit 2 as well.
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#
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# Inputs are built at run time from the host's own true executable (the first
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# one on PATH). Every case either sets FIPS_GLIBC_FLOOR or runs a scratch copy
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# of the check beside a build-floor.env of its own, so nothing depends on the
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# host's glibc or on the repository's packaging/build-floor.env.
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#
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# Exit 0 = every case behaved. Exit 1 = a case did not. Exit 2 = the cases
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# could not run (no readelf, no dpkg-deb, no dynamic true); never a pass.
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# ─────────────────────────────────────────────────────────────────────────────
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set -uo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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CHECK="$SCRIPT_DIR/../check-glibc-floor.sh"
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WORK="$(mktemp -d)"
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trap 'chmod -R u+rwx "$WORK" 2>/dev/null; rm -rf "$WORK"' EXIT
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cannot() { echo "glibc-floor cases: $*; cannot run." >&2; exit 2; }
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for tool in readelf dpkg dpkg-deb tar; do
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command -v "$tool" >/dev/null 2>&1 || cannot "$tool is not installed"
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done
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# `true` is a shell builtin, so `command -v` would print the bare word.
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HOSTELF="$(type -P true)" || cannot "no true executable on PATH"
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readelf -hW "$HOSTELF" >/dev/null 2>&1 || cannot "$HOSTELF is not an ELF object"
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NEED="$(readelf -VW "$HOSTELF" 2>/dev/null | awk '/Version needs section/,0' \
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| grep -oE 'GLIBC_[0-9.]+' | sed 's/GLIBC_//' | sort -V | tail -1)"
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[ -n "$NEED" ] || cannot "$HOSTELF has no glibc version requirement"
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dpkg --compare-versions "$NEED" gt 2.0 || cannot "$HOSTELF needs glibc $NEED, not above 2.0"
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FAILED=0
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ok() { echo " ok $*"; }
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bad() { echo " FAIL $*"; FAILED=$((FAILED + 1)); }
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ADVICE='installs cleanly and then fails to start'
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# run_script <script> <name> <floor> <arg...>: runs the given copy of the
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# check, leaving combined output in $WORK/out and the status in RC.
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run_script() {
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local script="$1"
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CASE="$2"
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local floor="$3"
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shift 3
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FIPS_GLIBC_FLOOR="$floor" bash "$script" "$@" > "$WORK/out" 2>&1
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RC=$?
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return 0
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}
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# run_case <name> <floor> <arg...>: runs the check under test.
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run_case() { run_script "$CHECK" "$@"; }
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# floor_tree <name> [env contents]: a scratch copy of the check at
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# $WORK/<name>/testing, so it reads its floor from $WORK/<name>/packaging. With
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# no contents there is no packaging/build-floor.env at all. Prints the copy.
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floor_tree() {
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local root="$WORK/$1"
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mkdir -p "$root/testing"
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cp "$CHECK" "$root/testing/check-glibc-floor.sh"
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if [ $# -gt 1 ]; then
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mkdir -p "$root/packaging"
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printf '%s\n' "$2" > "$root/packaging/build-floor.env"
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fi
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printf '%s\n' "$root/testing/check-glibc-floor.sh"
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}
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# Assertions on the last run.
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exit_is() {
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if [ "$RC" -eq "$1" ]; then ok "$CASE: exit $1"
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else bad "$CASE: exit $RC, expected $1"; sed 's/^/ | /' "$WORK/out"; fi
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}
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has() {
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if grep -qF -- "$1" "$WORK/out"; then ok "$CASE: says '$1'"
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else bad "$CASE: does not say '$1'"; fi
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}
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lacks() {
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if grep -qF -- "$1" "$WORK/out"; then bad "$CASE: says '$1'"
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else ok "$CASE: does not say '$1'"; fi
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}
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# unchecked_lists <name>: the name appears on an UNCHECKED line where it was
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# met, and again in the "Not checked:" list at the end of the run, which is the
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# part a reader of a long run sees.
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unchecked_lists() {
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if grep -E '^\s*UNCHECKED ' "$WORK/out" | grep -qF -- "$1"; then
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ok "$CASE: reports $1 as not checked"
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else
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bad "$CASE: does not report $1 as not checked"
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fi
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if sed -n '/^ Not checked:$/,$p' "$WORK/out" | grep -qF -- "$1"; then
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ok "$CASE: lists $1 at the end of the run"
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else
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bad "$CASE: does not list $1 at the end of the run"
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fi
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}
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# no_advice: the above-the-floor advice is absent.
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no_advice() { lacks "$ADVICE"; }
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# build_deb <name> <file to place in usr/bin>
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build_deb() {
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local name="$1" payload="$2" root="$WORK/pkg-$1"
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mkdir -p "$root/DEBIAN" "$root/usr/bin"
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cp "$payload" "$root/usr/bin/"
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chmod 755 "$root/usr/bin/"*
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printf 'Package: %s\nVersion: 1.0\nArchitecture: all\nMaintainer: t <t@t>\nDescription: t\n' \
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"$name" > "$root/DEBIAN/control"
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dpkg-deb --root-owner-group -b "$root" "$WORK/$name.deb" >/dev/null 2>&1 \
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|| cannot "dpkg-deb could not build a test package"
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}
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|
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echo "check-glibc-floor cases ($HOSTELF needs glibc $NEED)"
|
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|
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printf 'not an ELF object\n' > "$WORK/notes.txt"
|
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mkdir -p "$WORK/tarsrc" && cp "$HOSTELF" "$WORK/tarsrc/true"
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tar -czf "$WORK/fips.tar.gz" -C "$WORK/tarsrc" true
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printf 'not a package\n' > "$WORK/x.deb"
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printf '#!/bin/sh\nexit 0\n' > "$WORK/setup-script"
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build_deb scripts-only "$WORK/setup-script"
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build_deb with-elf "$HOSTELF"
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run_case "text file" "$NEED" "$WORK/notes.txt"
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exit_is 2; has "could not check"; unchecked_lists notes.txt; no_advice
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run_case "tarball" "$NEED" "$WORK/fips.tar.gz"
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exit_is 2; has "unpack it"; unchecked_lists fips.tar.gz; no_advice
|
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|
||||
run_case "nonexistent path" "$NEED" "$WORK/missing-binary"
|
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exit_is 2; has "does not exist"; unchecked_lists missing-binary; no_advice
|
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|
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if [ "$(id -u)" -eq 0 ]; then
|
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echo " SKIP unreadable file: running as root, so permissions do not stop a read"
|
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else
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||||
cp "$HOSTELF" "$WORK/locked" && chmod 000 "$WORK/locked"
|
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run_case "unreadable file" "$NEED" "$WORK/locked"
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exit_is 2; unchecked_lists locked; no_advice
|
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fi
|
||||
|
||||
run_case "corrupt .deb then a good binary" "$NEED" "$WORK/x.deb" "$HOSTELF"
|
||||
exit_is 2; has "could not check"; unchecked_lists x.deb; no_advice
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has "ok $(basename "$HOSTELF") needs glibc $NEED"
|
||||
|
||||
run_case ".deb with only a script" "$NEED" "$WORK/scripts-only.deb"
|
||||
exit_is 2; has "no ELF executables"; unchecked_lists scripts-only.deb; no_advice
|
||||
|
||||
run_case "binary at the floor" "$NEED" "$HOSTELF"
|
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exit_is 0; has "glibc floor check passed"; lacks "could not check"; no_advice
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||||
|
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run_case ".deb with a binary at the floor" "$NEED" "$WORK/with-elf.deb"
|
||||
exit_is 0; has "glibc floor check passed"; no_advice
|
||||
|
||||
run_case "binary above the floor" 2.0 "$HOSTELF"
|
||||
exit_is 1; has "above the declared floor 2.0"; has "$ADVICE"
|
||||
|
||||
run_case "binary above the floor beside a text file" 2.0 "$HOSTELF" "$WORK/notes.txt"
|
||||
exit_is 1; has "$ADVICE"; unchecked_lists notes.txt
|
||||
|
||||
run_case "binary at the floor beside a text file" "$NEED" "$HOSTELF" "$WORK/notes.txt"
|
||||
exit_is 2; has "ok $(basename "$HOSTELF") needs glibc $NEED"; unchecked_lists notes.txt
|
||||
no_advice
|
||||
|
||||
# With FIPS_GLIBC_FLOOR empty the floor comes from packaging/build-floor.env.
|
||||
# When that cannot supply one, there is nothing to check against: that is
|
||||
# "could not run" (exit 2), never a pass and never a binary above the floor.
|
||||
NOENV="$(floor_tree no-env)"
|
||||
run_script "$NOENV" "no build-floor.env and no floor set" "" "$HOSTELF"
|
||||
exit_is 2; has "no floor to check against"; lacks "glibc floor check passed"
|
||||
no_advice
|
||||
|
||||
EMPTYENV="$(floor_tree empty-env 'FIPS_GLIBC_FLOOR=""')"
|
||||
run_script "$EMPTYENV" "build-floor.env with an empty floor" "" "$HOSTELF"
|
||||
exit_is 2; has "no floor to check against"; lacks "glibc floor check passed"
|
||||
no_advice
|
||||
|
||||
NOFLOOR="$(floor_tree no-floor 'FIPS_BUILD_IMAGE="ubuntu:22.04"')"
|
||||
run_script "$NOFLOOR" "build-floor.env declaring no floor" "" "$HOSTELF"
|
||||
exit_is 2; has "no floor to check against"; lacks "glibc floor check passed"
|
||||
no_advice
|
||||
|
||||
GOODENV="$(floor_tree good-env "FIPS_GLIBC_FLOOR=\"$NEED\"")"
|
||||
run_script "$GOODENV" "floor read from build-floor.env" "" "$HOSTELF"
|
||||
exit_is 0; has "declared floor: $NEED"; has "glibc floor check passed"
|
||||
|
||||
if [ "$FAILED" -ne 0 ]; then
|
||||
echo "check-glibc-floor cases: $FAILED assertion(s) failed"
|
||||
exit 1
|
||||
fi
|
||||
echo "check-glibc-floor cases: all passed"
|
||||
Reference in New Issue
Block a user