#!/bin/sh

# Test df's behavior for skipping the pseudo "rootfs" file system.

# Copyright (C) 2012-2018 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 <https://www.gnu.org/licenses/>.

. "${srcdir=.}/tests/init.sh"; path_prepend_ ./src

print_ver_ df

# Protect against inaccessible remote mounts etc.

timeout 10 df || skip_ "df fails"

# Verify that rootfs is in mtab (and shown when the -a option is specified).

# Note this is the case when /proc/self/mountinfo is parsed

# rather than /proc/mounts.  I.e., when libmount is being used.

df -a >out || fail=1

grep '^rootfs' out || skip_ 'no rootfs in mtab'

# Ensure that rootfs is suppressed when no options is specified.

df >out || fail=1

grep '^rootfs' out && { fail=1; cat out; }

# Ensure that rootfs is yet skipped when explicitly specifying "-t rootfs".

# As df emits "no file systems processed" in this case, it would be a failure

# if df exited with status Zero.

returns_ 1 df -t rootfs >out || fail=1

grep '^rootfs' out && { fail=1; cat out; }

# Ensure that the rootfs is shown when explicitly both specifying "-t rootfs"

# and the -a option.

df -t rootfs -a >out || fail=1

grep '^rootfs' out || { fail=1; cat out; }

# Ensure that the rootfs is omitted in all_fs mode when it is explicitly

# black-listed.

df -a -x rootfs >out || fail=1

grep '^rootfs' out && { fail=1; cat out; }

test "$fail" = 1 && dump_mount_list_

Exit $fail