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
|
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2023 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* 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/>.
*
*/
package gadget
import (
"github.com/snapcore/snapd/osutil/kcmdline"
"github.com/snapcore/snapd/strutil"
)
// FilterKernelCmdline returns a filtered command line, removing
// arguments that are not on a list of allowed kernel arguments. A
// wild card ('*') can be used in the allow list for the
// values. Additionally, a string with the arguments that have been
// filtered out is also returned.
func FilterKernelCmdline(cmdline string, allowedSl []kcmdline.ArgumentPattern) (argsAllowed, argsDenied string) {
matcher := kcmdline.NewMatcher(allowedSl)
proposed := kcmdline.Parse(cmdline)
in := []string{}
out := []string{}
for _, p := range proposed {
if matcher.Match(p) {
in = append(in, p.String())
} else {
out = append(out, p.String())
}
}
argsAllowed = strutil.JoinNonEmpty(in, " ")
argsDenied = strutil.JoinNonEmpty(out, " ")
return argsAllowed, argsDenied
}
|
