mirror of https://github.com/kubernetes/kops.git
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
/*
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Copyright 2019 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package systemd
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import (
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"bytes"
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"encoding/hex"
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"strings"
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"k8s.io/klog/v2"
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)
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// EscapeCommand is used to escape a command
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func EscapeCommand(argv []string) string {
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var escaped []string
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for _, arg := range argv {
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escaped = append(escaped, escapeArg(arg))
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}
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return strings.Join(escaped, " ")
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}
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func escapeArg(s string) string {
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var b bytes.Buffer
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needQuotes := false
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for i := 0; i < len(s); i++ {
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c := s[i]
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if ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || ('0' <= c && c <= '9') {
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b.WriteByte(c)
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continue
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}
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switch c {
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case '!', '#', '$', '%', '&', '(', ')', '*', '+', ',', '-', '.', '/', ':', ';',
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'<', '>', '=', '?', '@', '[', ']', '^', '_', '`', '{', '|', '}', '~':
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b.WriteByte(c)
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case ' ':
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needQuotes = true
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b.WriteByte(c)
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case '"':
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b.WriteString("\\\"")
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case '\'':
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b.WriteString("\\'")
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case '\\':
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b.WriteString("\\\\")
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default:
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klog.Warningf("Unusual character in systemd command: %v", s)
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b.WriteString("\\x")
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b.WriteString(hex.EncodeToString([]byte{c}))
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}
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}
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if needQuotes {
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return "\"" + b.String() + "\""
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}
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return b.String()
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}
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