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kpatch-build: apply 'cp -f ... || die' pattern

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Be robust and use "cp -f".  Finish with "|| die" to be dead serious
about it.

Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
This commit is contained in:
Joe Lawrence 2021-02-02 16:40:46 -05:00
parent e25450f5a8
commit f951c1a92e
1 changed files with 10 additions and 8 deletions
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18
kpatch-build/kpatch-build
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@ -640,7 +640,7 @@ if [[ -n "$USERSRCDIR" ]]; then
# save original vmlinux before it gets overwritten by sourcedir build
if [[ -z "$OOT_MODULE" ]] && [[ "$VMLINUX" -ef "$SRCDIR"/vmlinux ]]; then
cp -f "$VMLINUX" "$TEMPDIR/vmlinux"
cp -f "$VMLINUX" "$TEMPDIR/vmlinux" || die
VMLINUX="$TEMPDIR/vmlinux"
fi
@ -734,7 +734,9 @@ fi
[[ -z "$CONFIGFILE" ]] && CONFIGFILE="$SRCDIR"/.config
[[ ! -e "$CONFIGFILE" ]] && die "can't find config file"
[[ ! "$CONFIGFILE" -ef "$SRCDIR"/.config ]] && cp -f "$CONFIGFILE" "$SRCDIR/.config"
if [[ ! "$CONFIGFILE" -ef "$SRCDIR"/.config ]] ; then
cp -f "$CONFIGFILE" "$SRCDIR/.config" || die
fi
# kernel option checking
grep -q "CONFIG_DEBUG_INFO=y" "$CONFIGFILE" || die "kernel doesn't have 'CONFIG_DEBUG_INFO' enabled"
@ -785,7 +787,7 @@ grep -q "CONFIG_GCC_PLUGIN_RANDSTRUCT=y" "$CONFIGFILE" && die "kernel option 'CO
# support extended ELF sections. Disable the BTF typeinfo generation in
# link-vmlinux.sh since kpatch doesn't care about that anyway.
if grep -q "CONFIG_DEBUG_INFO_BTF=y" "$CONFIGFILE" ; then
cp "$SRCDIR/scripts/link-vmlinux.sh" "$TEMPDIR/"
cp -f "$SRCDIR/scripts/link-vmlinux.sh" "$TEMPDIR/link-vmlinux.sh" || die
sed -i 's/CONFIG_DEBUG_INFO_BTF/DISABLED_FOR_KPATCH_BUILD/g' "$SRCDIR"/scripts/link-vmlinux.sh || die
fi
@ -819,7 +821,7 @@ unset KPATCH_GCC_TEMPDIR
CROSS_COMPILE="$TOOLSDIR/kpatch-gcc " make "-j$CPUS" $TARGETS 2>&1 | logger || die
# Save original module symvers
cp "$SRCDIR/Module.symvers" "$TEMPDIR/Module.symvers"
cp -f "$SRCDIR/Module.symvers" "$TEMPDIR/Module.symvers" || die
echo "Building patched source"
apply_patches
@ -911,7 +913,7 @@ ERROR=0
# Prepare OOT module symvers file
if [[ -n "$OOT_MODULE" ]]; then
BUILDDIR="/lib/modules/$ARCHVERSION/build/"
cp "$SRCDIR/Module.symvers" "$TEMPDIR/Module.symvers"
cp -f "$SRCDIR/Module.symvers" "$TEMPDIR/Module.symvers" || die
awk '{ print $1 "\t" $2 "\t" $3 "\t" $4}' "${BUILDDIR}/Module.symvers" >> "$TEMPDIR/Module.symvers"
fi
@ -966,7 +968,7 @@ for i in $FILES; do
objnames[${#objnames[@]}]="$KOBJFILE"
fi
else
cp -f "patched/$i" "output/$i"
cp -f "patched/$i" "output/$i" || die
objnames[${#objnames[@]}]="$KOBJFILE"
fi
done
@ -1006,7 +1008,7 @@ cd "$TEMPDIR/output" || die
ld -r $KPATCH_LDFLAGS -o ../patch/tmp_output.o $(find . -name "*.o") 2>&1 | logger || die
if [[ "$USE_KLP" -eq 1 ]]; then
cp "$TEMPDIR"/patch/tmp_output.o "$TEMPDIR"/patch/output.o || die
cp -f "$TEMPDIR"/patch/tmp_output.o "$TEMPDIR"/patch/output.o || die
# Avoid MODPOST warning (pre-v5.8) and error (v5.8+) with an empty .cmd file
touch "$TEMPDIR"/patch/.output.o.cmd || die
else
@ -1033,7 +1035,7 @@ if [[ "$USE_KLP" -eq 1 ]]; then
if [[ "$USE_KLP_ARCH" -eq 0 ]]; then
extra_flags="--no-klp-arch-sections"
fi
cp "$TEMPDIR/patch/$MODNAME.ko" "$TEMPDIR/patch/tmp.ko" || die
cp -f "$TEMPDIR/patch/$MODNAME.ko" "$TEMPDIR/patch/tmp.ko" || die
"$TOOLSDIR"/create-klp-module $extra_flags "$TEMPDIR/patch/tmp.ko" "$TEMPDIR/patch/$MODNAME.ko" 2>&1 | logger 1
check_pipe_status create-klp-module
fi