#!/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_ { local *F; open 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 { my $msg = join '', @_; print $q->header(), $q->start_html(); print $q->h1(_("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; }