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#!/usr/bin/perl
# Test whether programs exit upon a single EOF from a tty.
# Ensure that e.g., cat exits upon a single EOF (^D) from a tty.
# Do the same for all programs that can read stdin,
# require no arguments and that write to standard output.
# Copyright (C) 2003-2015 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/>.
use strict;
(my $ME = $0) =~ s|.*/||;
# Some older versions of Expect.pm (e.g. 1.07) lack the log_user method,
# so check for that, too.
eval { require Expect; Expect->require_version('1.11') };
$@
and CuSkip::skip "$ME: this script requires Perl's Expect package >=1.11\n";
{
my $fail = 0;
my @stdin_reading_commands = qw(
base64
cat
cksum
dd
expand
fmt
fold
head
md5sum
nl
od
paste
pr
ptx
sha1sum
sha224sum
sha256sum
sha384sum
sha512sum
shuf
sort
sum
tac
tail
tee
tsort
unexpand
uniq
wc
);
my $stderr = 'tty-eof.err';
foreach my $cmd ((@stdin_reading_commands), 'cut -f2')
{
my $exp = new Expect;
$exp->log_user(0);
$exp->spawn("$cmd 2> $stderr")
or (warn "$ME: cannot run '$cmd': $!\n"), $fail=1, next;
# No input for cut -f2.
$cmd =~ /^cut/
or $exp->send("a b\n");
$exp->send("\cD"); # This is Control-D. FIXME: what if that's not EOF?
$exp->expect (0, '-re', "^a b\\r?\$");
my $found = $exp->expect (1, '-re', "^.+\$");
$found and warn "F: $found: " . $exp->exp_match () . "\n";
$exp->expect(10, 'eof');
# Expect no output from cut, since we gave it no input.
defined $found || $cmd =~ /^cut/
or (warn "$ME: $cmd didn't produce expected output\n"),
$fail=1, next;
defined $exp->exitstatus
or (warn "$ME: $cmd didn't exit after ^D from standard input\n"),
$fail=1, next;
my $s = $exp->exitstatus;
$s == 0
or (warn "$ME: $cmd exited with status $s (expected 0)\n"),
$fail=1;
$exp->hard_close();
# dd normally writes to stderr. If it exits successfully, we're done.
$cmd eq 'dd' && $s == 0
and next;
if (-s $stderr)
{
warn "$ME: $cmd wrote to stderr:\n";
system "cat $stderr";
$fail = 1;
}
}
continue
{
unlink $stderr
or warn "$ME: failed to remove stderr file from $cmd, $stderr: $!\n";
}
exit $fail
}
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