1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
#!/usr/bin/perl
use lib qw(/usr/lib/libDrakX);
use CGI;
use common;
use c;
my $q = CGI->new;
$| = 1;
my $script_name = $q->url('-relative' => 1);
# name inversed (must be in sync with interactive_http.html)
my $pipe_r = "/tmp/interactive_http_w";
my $pipe_w = "/tmp/interactive_http_r";
if ($q->param('state') eq 'new') {
force_exit_dead_prog();
mkfifo($pipe_r); mkfifo($pipe_w);
spawn_server($q->param('prog'));
first_step();
} elsif ($q->param('state') eq 'next_step') {
next_step();
} else {
error("booh...");
}
sub read_() {
open my $F, "<$pipe_r" or error("Failed to connect to the prog");
my $t;
print $t while sysread $F, $t, 1;
}
sub write_() {
local *F;
open F, ">$pipe_w" or die;
my $q = CGI->new;
$q->save(\*F);
}
sub first_step() { read_() }
sub next_step() { write_(); read_() }
sub force_exit_dead_prog() {
-p $pipe_w or return;
{
local *F;
sysopen F, $pipe_w, 1 | c::O_NONBLOCK() or return;
syswrite F, "force_exit_dead_prog=1\n";
}
my $cnt = 10;
while (-p $pipe_w) {
sleep 1;
$cnt-- or error("Dead prog failed to exit");
}
}
sub spawn_server {
my ($prog) = @_;
my @authorised_progs = map { chomp_($_) } cat_('/etc/drakxtools_http/authorised_progs');
member($prog, @authorised_progs) or error("You tried to call a non-authorised program");
fork() and return;
$ENV{INTERACTIVE_HTTP} = $script_name;
open STDIN, "</dev/zero";
open STDOUT, ">/dev/null"; #tmp/log";
open STDERR, ">&STDOUT";
c::setsid();
exec $prog or die "prog $prog not found\n";
}
sub error {
print $q->header, $q->start_html;
print $q->h1(N("Error")), @_;
print $q->end_html, "\n";
exit 0;
}
sub mkfifo {
my ($f) = @_;
-p $f and return;
unlink $f;
syscall_('mknod', $f, c::S_IFIFO() | 0600, 0) or die "mkfifo failed";
chmod 0666, $f;
}
|
