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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
package run_program; # $Id$
use diagnostics;
use strict;
use c;
use MDK::Common;
use log;
1;
sub run_or_die {
my ($name, @args) = @_;
run($name, @args) or die "$name failed\n";
}
sub rooted_or_die {
my ($root, $name, @args) = @_;
rooted($root, $name, @args) or die "$name failed\n";
}
sub get_stdout {
my ($name, @args) = @_;
my @r;
run($name, '>', \@r, @args) or return;
wantarray() ? @r : join('', @r);
}
sub rooted_get_stdout {
my ($root, $name, @args) = @_;
my @r;
rooted($root, $name, '>', \@r, @args) or return;
wantarray() ? @r : join('', @r);
}
sub run { raw({}, @_) }
sub rooted {
my ($root, $name, @args) = @_;
raw({ root => $root }, $name, @args);
}
sub raw {
my ($options, $name, @args) = @_;
my $root = $options->{root} || '';
my $real_name = ref($name) ? $name->[0] : $name;
my ($stdout_raw, $stdout_mode, $stderr_raw, $stderr_mode);
($stdout_mode, $stdout_raw, @args) = @args if $args[0] =~ /^>>?$/;
($stderr_mode, $stderr_raw, @args) = @args if $args[0] =~ /^2>>?$/;
my $args = $options->{sensitive_arguments} ? '<hidden arguments>' : join(' ', @args);
log::explanations("running: $real_name $args" . ($root ? " with root $root" : ""));
return if $root && $<;
$root ? ($root .= '/') : ($root = '');
my $tmpdir = sub {
my $dir = $< != 0 ? "$ENV{HOME}/tmp" : -d '/root' ? '/root/tmp' : '/tmp';
-d $dir or mkdir($dir, 0700);
$dir;
};
my $stdout = $stdout_raw && (ref($stdout_raw) ? $tmpdir->() . "/.drakx-stdout.$$" : "$root$stdout_raw");
my $stderr = $stderr_raw && (ref($stderr_raw) ? $tmpdir->() . "/.drakx-stderr.$$" : "$root$stderr_raw");
#- checking if binary exist to avoid clobbering stdout file
my $rname = $real_name =~ /(.*?)[\s\|]/ ? $1 : $real_name;
if (! ($rname =~ m!^/!
? -x "$root$rname" || $root && -l "$root$rname" #- handle non-relative symlink which can be broken when non-rooted
: whereis_binary($rname, $root))) {
log::l("program not found: $real_name");
return;
}
if (my $pid = fork()) {
if ($options->{detach}) {
$pid;
} else {
my $ok;
add2hash_($options, { timeout => 10 * 60 });
eval {
local $SIG{ALRM} = sub { die "ALARM" };
my $remaining = $options->{timeout} && $options->{timeout} ne 'never' && alarm($options->{timeout});
waitpid $pid, 0;
$ok = $? == -1 || ($? >> 8) == 0;
alarm $remaining;
};
if ($@) {
log::l("ERROR: killing runaway process (process=$real_name, pid=$pid, args=@args, error=$@)");
kill 9, $pid;
return;
}
if ($stdout_raw && ref($stdout_raw)) {
if (ref($stdout_raw) eq 'ARRAY') {
@$stdout_raw = cat_($stdout);
} else {
$$stdout_raw = cat_($stdout);
}
unlink $stdout;
}
if ($stderr_raw && ref($stderr_raw)) {
if (ref($stderr_raw) eq 'ARRAY') {
@$stderr_raw = cat_($stderr);
} else {
$$stderr_raw = cat_($stderr);
}
unlink $stderr;
}
$ok;
}
} else {
if ($options->{setuid}) {
require POSIX;
POSIX::setuid($options->{set_uid});
}
sub die_exit {
log::l($_[0]);
c::_exit(128);
}
if ($stderr && $stderr eq 'STDERR') {
} elsif ($stderr) {
$stderr_mode =~ s/2//;
open STDERR, "$stderr_mode $stderr" or die_exit("run_program can not output in $stderr (mode `$stderr_mode')");
} elsif ($::isInstall) {
open STDERR, ">> /tmp/ddebug.log" or open STDOUT, ">> /dev/tty7" or die_exit("run_program can not log, give me access to /tmp/ddebug.log");
}
if ($stdout && $stdout eq 'STDOUT') {
} elsif ($stdout) {
open STDOUT, "$stdout_mode $stdout" or die_exit("run_program can not output in $stdout (mode `$stdout_mode')");
} elsif ($::isInstall) {
open STDOUT, ">> /tmp/ddebug.log" or open STDOUT, ">> /dev/tty7" or die_exit("run_program can not log, give me access to /tmp/ddebug.log");
}
$root and chroot $root;
chdir($options->{chdir} || "/");
my $ok = ref $name ? do {
exec { $name->[0] } $name->[1], @args;
} : do {
exec $name, @args;
};
if (!$ok) {
die_exit("exec of $real_name failed: $!");
}
}
}
# run in background a sub that give back data through STDOUT a la run_program::get_stdout but w/ arbitrary perl code instead of external program
package bg_command;
sub new {
my ($class, $sub) = @_;
my $o = bless {}, $class;
if ($o->{pid} = open(my $fd, "-|")) {
$o->{fd} = $fd;
$o;
} else {
$sub->();
c::_exit(0);
}
}
sub DESTROY {
my ($o) = @_;
close $o->{fd} or warn "kid exited $?";
waitpid $o->{pid}, 0;
}
1;
#- Local Variables:
#- mode:cperl
#- tab-width:8
#- End:
|
