tests: Add a test to make sure GPT GUIDs default to filesystem

When no flag is set on a GPT partition the GUID should fall back to the
filesystem type for fat32, swap, and hfs+ and if no filesystem is found
it should default to linux filesystem data type, showing no filesystem
and no flags.

2 files changed, 108 insertions, 0 deletions

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 3dc6e72..5cb7aa3 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -60,6 +60,7 @@ TESTS = \
   t3000-resize-fs.sh \
   t3200-resize-partition.sh \
   t3200-type-change.sh \
+  t3210-gpt-type-change.sh \
   t3300-palo-prep.sh \
   t3310-flags.sh \
   t3400-whole-disk-FAT-partition.sh \
diff --git a/tests/t3210-gpt-type-change.sh b/tests/t3210-gpt-type-change.sh
new file mode 100755
index 0000000..57000d9
--- /dev/null
+++ b/tests/t3210-gpt-type-change.sh
@@ -0,0 +1,107 @@
+#!/bin/sh
+# Ensure parted changes GUID back to match its FS.
+
+# Copyright (C) 2021 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/>.
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../parted
+
+require_root_
+require_scsi_debug_module_
+
+grep '^#define USE_BLKID 1' "$CONFIG_HEADER" > /dev/null ||
+  skip_ 'this system lacks a new-enough libblkid'
+
+# What filesystem tools are present?
+FSTYPES=""
+
+# Is mkfs.hfsplus available?
+mkfs.hfsplus 2>&1 | grep '^usage:' && FSTYPES="hfs+"
+
+# Is mkfs.vfat available?
+mkfs.vfat 2>&1 | grep '^Usage:' && FSTYPES="$FSTYPES fat32"
+
+# Is mkswap available?
+mkswap -V 2>&1 | grep '^mkswap' && FSTYPES="$FSTYPES linux-swap"
+
+[ -n "$FSTYPES" ] || skip_ "No supported filesystem tools (vfat, hfs+, swap) installed"
+
+
+# create memory-backed device
+scsi_debug_setup_ dev_size_mb=25 > dev-name ||
+  skip_ 'failed to create scsi_debug device'
+scsi_dev=$(cat dev-name)
+
+# Create a formatted partition. 
+# Set a different partition type on it, eg. lvm, then unset it.
+# The partition flag should return to the detected filesystem type.
+
+for fs_type in $FSTYPES; do
+  echo "fs_type=$fs_type"
+
+
+  parted -s $scsi_dev mklabel gpt mkpart first $fs_type 1MB 25MB > out 2>&1 || fail=1
+  # expect no output
+  compare /dev/null out || fail=1
+
+  p1=${scsi_dev}1
+  wait_for_dev_to_appear_ $p1 || fail=1
+
+  case $fs_type in
+    fat32) mkfs.vfat $p1 || fail=1 ;;
+    hfs*) mkfs.hfsplus $p1 || fail=1;;
+    linux-swap) mkswap $p1 || fail=1;;
+    *) error "internal error: unhandled fs type: $fs_type";;
+  esac
+
+  # Confirm the filesystem and flags are as expected
+  parted -s $scsi_dev u s p > out || fail=1
+  case $fs_type in
+    fat32) grep 'fat16.*msftdata$' out || { fail=1; cat out; } ;;
+    hfs*) grep 'hfs+.*first$' out || { fail=1; cat out; } ;;
+    linux-swap) grep 'linux-swap.*swap$' out || { fail=1; cat out; } ;;
+    *) error "internal error: unhandled fs type: $fs_type";;
+  esac
+
+  # Set the lvm GUID on the partition
+  parted -s $scsi_dev set 1 lvm on > out 2>&1 || fail=1
+  # expect no output
+  compare /dev/null out || fail=1
+
+  # Confirm filesystem probe is the same, but flags are now lvm
+  parted -s $scsi_dev u s p > out || fail=1
+  case $fs_type in
+    fat32) grep 'fat16.*lvm$' out || { fail=1; cat out; } ;;
+    hfs*) grep 'hfs+.*lvm$' out || { fail=1; cat out; } ;;
+    linux-swap) grep 'linux-swap.*lvm$' out || { fail=1; cat out; } ;;
+    *) error "internal error: unhandled fs type: $fs_type";;
+  esac
+
+  # Unset the lvm GUID on both partitions
+  parted -s $scsi_dev set 1 lvm off > out 2>&1 || fail=1
+  # expect no output
+  compare /dev/null out || fail=1
+
+  # Confirm the filesystem and flags are as expected
+  parted -s $scsi_dev u s p > out || fail=1
+  case $fs_type in
+    fat32) grep 'fat16.*msftdata$' out || { fail=1; cat out; } ;;
+    hfs*) grep 'hfs+.*first$' out || { fail=1; cat out; } ;;
+    linux-swap) grep 'linux-swap.*swap$' out || { fail=1; cat out; } ;;
+    *) error "internal error: unhandled fs type: $fs_type";;
+  esac
+done
+
+Exit $fail