1#!/usr/local/bin/perl
2
3# Test t0000..t9999.sh for non portable shell scripts
4# This script can be called with one or more filenames as parameters
5
6use strict;
7use warnings;
8
9my $exit_code=0;
10my %func;
11
12sub err {
13	my $msg = shift;
14	s/^\s+//;
15	s/\s+$//;
16	s/\s+/ /g;
17	print "$ARGV:$.: error: $msg: $_\n";
18	$exit_code = 1;
19}
20
21# glean names of shell functions
22for my $i (@ARGV) {
23	open(my $f, '<', $i) or die "$0: $i: $!\n";
24	while (<$f>) {
25		$func{$1} = 1 if /^\s*(\w+)\s*\(\)\s*{\s*$/;
26	}
27	close $f;
28}
29
30my $line = '';
31while (<>) {
32	chomp;
33	$line .= $_;
34	# stitch together incomplete lines (those ending with "\")
35	next if $line =~ s/\\$//;
36
37	$_ = $line;
38	/\bcp\s+-a/ and err 'cp -a is not portable';
39	/\bsed\s+-[^efn]\s+/ and err 'sed option not portable (use only -n, -e, -f)';
40	/\becho\s+-[neE]/ and err 'echo with option is not portable (use printf)';
41	/^\s*declare\s+/ and err 'arrays/declare not portable';
42	/^\s*[^#]\s*which\s/ and err 'which is not portable (use type)';
43	/\btest\s+[^=]*==/ and err '"test a == b" is not portable (use =)';
44	/\bwc -l.*"\s*=/ and err '`"$(wc -l)"` is not portable (use test_line_count)';
45	/\bhead\s+-c\b/ and err 'head -c is not portable (use test_copy_bytes BYTES <file >out)';
46	/(?:\$\(seq|^\s*seq\b)/ and err 'seq is not portable (use test_seq)';
47	/\bgrep\b.*--file\b/ and err 'grep --file FILE is not portable (use grep -f FILE)';
48	/\bexport\s+[A-Za-z0-9_]*=/ and err '"export FOO=bar" is not portable (use FOO=bar && export FOO)';
49	/^\s*([A-Z0-9_]+=(\w*|(["']).*?\3)\s+)+(\w+)/ and exists($func{$4}) and
50		err '"FOO=bar shell_func" assignment extends beyond "shell_func"';
51	$line = '';
52	# this resets our $. for each file
53	close ARGV if eof;
54}
55exit $exit_code;
56