zfs/tests/zfs-tests/tests/functional/large_files/large_files_002_pos.ksh

#!/bin/ksh -p
#
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#
# Copyright (c) 2015 by Lawrence Livermore National Security, LLC.
# All rights reserved.
#

. $STF_SUITE/include/libtest.shlib

#
# DESCRIPTION:
# Verify 'ulimit -f' file size restrictions are enforced.
#
# STRATEGY:
# 1. Set ulimit file size to unlimited, verify files can be created.
# 2. Reduce ulimit file size, verify the expected error is returned.
#

verify_runnable "both"

log_assert "Verify 'ulimit -f' maximum file size is enforced"

# Verify 'ulimit -f unlimited' works
log_must ulimit -f unlimited
log_must sh -c 'dd if=/dev/zero of=$TESTDIR/ulimit_write_file bs=1M count=2'
log_must sh -c 'truncate -s2M $TESTDIR/ulimit_trunc_file'
log_must rm $TESTDIR/ulimit_write_file $TESTDIR/ulimit_trunc_file

# Verify 'ulimit -f <size>' works
log_must ulimit -f 1024
log_mustnot sh -c 'dd if=/dev/zero of=$TESTDIR/ulimit_write_file bs=1M count=2'
log_must rm $TESTDIR/ulimit_write_file
# FreeBSD allows the sparse file because space has not been allocated.
if ! is_freebsd; then
	log_mustnot sh -c 'truncate -s2M $TESTDIR/ulimit_trunc_file'
	log_must rm $TESTDIR/ulimit_trunc_file
fi

log_pass "Successfully enforced 'ulimit -f' maximum file size"