#!/bin/sh
# Validate truncate parameter combinations

# Copyright (C) 2008-2013 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/>.

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


# must specify at least 1 file
truncate --size=0 && setglobal fail = '1'

# must specify size. don't default to 0
truncate file && setglobal fail = '1'

# mixture of absolute size & reference not allowed
truncate --size=0 --reference=file file && setglobal fail = '1'

# blocks without size is not valid
truncate --io-blocks --reference=file file && setglobal fail = '1'

# must specify valid numbers
truncate --size="invalid" file && setglobal fail = '1'

# spaces not significant around size
truncate --size="> -1" file && setglobal fail = '1'
truncate --size=" >1" file || setglobal fail = '1' #file now 1
truncate --size=" +1" file || setglobal fail = '1' #file now 2
test $[stat --format %s file] = 2 || setglobal fail = '1'

# reference allowed with relative size
truncate --size=" +1" -r file file || setglobal fail = '1' #file now 3
test $[stat --format %s file] = 3 || setglobal fail = '1'

# reference allowed alone also
truncate -r file file || setglobal fail = '1' #file still 3
test $[stat --format %s file] = 3 || setglobal fail = '1'
truncate -r file file2 || setglobal fail = '1' #file2 now 3
test $[stat --format %s file2] = 3 || setglobal fail = '1'

Exit $fail