1 files changed, 96 insertions, 0 deletions
diff --git a/tests/t0280-gpt-corrupt.sh b/tests/t0280-gpt-corrupt.sh
new file mode 100755
index 0000000..376de2f
--- /dev/null
+++ b/tests/t0280-gpt-corrupt.sh
@@ -0,0 +1,96 @@
+#!/bin/sh
+# corrupt a GPT table; ensure parted takes notice
+
+# Copyright (C) 2009-2014, 2019-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../parted
+
+dev=loop-file
+
+ss=$sector_size_
+n_sectors=5000
+
+dd if=/dev/null of=$dev bs=$ss seek=$n_sectors || fail=1
+
+# create gpt label
+parted -s $dev mklabel gpt > empty 2>&1 || fail=1
+compare /dev/null empty || fail=1
+
+# print the empty table
+parted -m -s $dev unit s print > t 2>&1 || fail=1
+sed "s,.*/$dev:,$dev:," t > out || fail=1
+
+# check for expected output
+printf "BYT;\n$dev:${n_sectors}s:file:$sector_size_:$sector_size_:gpt::;\n" \
+  > exp || fail=1
+compare exp out || fail=1
+
+# create a partition
+parted -s $dev mkpart sw linux-swap 2048s 4095s > empty 2>&1 || fail=1
+compare /dev/null empty || fail=1
+
+# We're going to change the name of the first partition,
+# thus invalidating the PartitionEntryArrayCRC32 checksum.
+orig_byte=$(gpt_corrupt_primary_table_ $dev $ss) || fail=1
+
+# printing the table must succeed, but with a scary diagnostic.
+parted -s $dev print > err 2>&1 || fail=1
+grep Error: err > k && mv k err || fail=1
+
+# check for expected diagnostic
+echo 'Error: The primary GPT table is corrupt, but the backup appears OK,' \
+    'so that will be used.' > exp || fail=1
+compare exp err || fail=1
+
+# ----------------------------------------------------------
+# Now, restore things, and corrupt the MyLBA in the alternate GUID table.
+
+# Restore original byte
+gpt_restore_primary_table_ $dev $ss "$orig_byte" || fail=1
+
+# print the table
+parted -s $dev print > out 2> err || fail=1
+compare /dev/null err || fail=1
+
+# The MyLBA member of the alternate table is in the last sector,
+# $n_sectors, 8-byte field starting at offset 24.
+alt_my_lba_offset=$(expr $n_sectors \* $ss - $ss + 24)
+# get the first byte of MyLBA
+byte=$(peek_ $dev $alt_my_lba_offset) || fail=1
+
+# Perturb it.
+test x"$byte" = xA && new_byte=B || new_byte=A
+
+# Replace good byte with the bad one.
+poke_ $dev $alt_my_lba_offset "$new_byte" || fail=1
+
+# attempting to set partition name must print a diagnostic
+parted -m -s $dev name 1 foo > err 2>&1 || fail=1
+
+# check for expected diagnostic
+echo 'Error: The backup GPT table is corrupt, but the primary appears OK,' \
+    'so that will be used.' > exp || fail=1
+compare exp err || fail=1
+
+# corruption is fixed; printing the table now elicits no diagnostic
+parted -m -s $dev u s print > out 2>&1 || fail=1
+
+# check for expected output
+printf "BYT;\nfile\n1:2048s:4095s:2048s::foo:swap;\n" > exp || fail=1
+sed "s/.*gpt::;/file/" out > k && mv k out || fail=1
+compare exp out || fail=1
+
+Exit $fail