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ktest: Enable user input to the console

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Allow the user to send input to the console by putting the terminal in
cbreak mode (to allow reading stdin one character at a time) and copying
all stdin data to the console's pty.

Link: http://lkml.kernel.org/r/bb1bbe7d202c95a3ce7894cfffdd8c725875978e.1422473610.git.jpoimboe@redhat.com

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Josh Poimboeuf 2015-01-28 13:38:39 -06:00 committed by Steven Rostedt
parent 9f2cdcbbb9
commit 9d2f7f051b
1 changed files with 37 additions and 16 deletions
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53
tools/testing/ktest/ktest.pl
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@ -178,7 +178,7 @@ my $checkout;
my $localversion;
my $iteration = 0;
my $successes = 0;
my $stty;
my $stty_orig;
my $bisect_good;
my $bisect_bad;
@ -1458,7 +1458,11 @@ sub open_console {
my $pid;
# save terminal settings
$stty = `stty -g`;
$stty_orig = `stty -g`;
# place terminal in cbreak mode so that stdin can be read one character at
# a time without having to wait for a newline
system("stty -icanon -echo -icrnl");
create_pty($ptm, $pts);
@ -1487,7 +1491,7 @@ sub close_console {
close($fp);
# restore terminal settings
system("stty $stty");
system("stty $stty_orig");
}
sub start_monitor {
@ -1827,7 +1831,9 @@ sub wait_for_input
{
my ($fp, $time) = @_;
my $rin;
my $ready;
my $rout;
my $nr;
my $buf;
my $line;
my $ch;
@ -1837,21 +1843,36 @@ sub wait_for_input
$rin = '';
vec($rin, fileno($fp), 1) = 1;
($ready, $time) = select($rin, undef, undef, $time);
vec($rin, fileno(\*STDIN), 1) = 1;
$line = "";
while (1) {
$nr = select($rout=$rin, undef, undef, $time);
# try to read one char at a time
while (sysread $fp, $ch, 1) {
$line .= $ch;
last if ($ch eq "\n");
if ($nr <= 0) {
return undef;
}
# copy data from stdin to the console
if (vec($rout, fileno(\*STDIN), 1) == 1) {
sysread(\*STDIN, $buf, 1000);
syswrite($fp, $buf, 1000);
next;
}
$line = "";
# try to read one char at a time
while (sysread $fp, $ch, 1) {
$line .= $ch;
last if ($ch eq "\n");
}
if (!length($line)) {
return undef;
}
return $line;
}
if (!length($line)) {
return undef;
}
return $line;
}
sub reboot_to {