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#!/bin/perl
#
# Copyright (c) 2023-2025 Ian Marco Moffett and the Osmora Team.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of Hyra nor the names of its contributors may be used
# to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
use strict;
use warnings;
#
# Fetch a single line from a file, returns eof when there
# are no more lines to fetch.
#
# Arg0: File handle
#
sub get_line {
my $fhand = shift;
return <$fhand> || die "Failed to read file...";
}
my $argc = 0+@ARGV;
if ($argc < 1) {
die "Usage: $0 <filename>";
}
# Grab the file
my $clean = 1;
my $lineno = 1;
my $RS = undef;
my $file = shift;
open my $fhand, '<', $file || die "Failed to open $file: $^E";
my $tmp = get_line($fhand);
# Is there a newline at the start of the file?
if ($tmp =~ /^\n/) {
print "Found redundant newline at start of file\n";
$clean = 0;
}
while (!eof($fhand)) {
my $cur = get_line($fhand);
if ($cur =~ /^\n$/ && $tmp =~ /^\n$/) {
print "Found redundant newline @ $lineno\n";
$clean = 0;
}
++$lineno;
$tmp = $cur;
}
# What about at the end?
if ($tmp =~ /^\n/) {
print "Found redundant newline at end of file\n";
$clean = 0;
}
if ($clean) {
print "File is clean\n"
}
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