mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
115 lines
2.3 KiB
Go
115 lines
2.3 KiB
Go
/*
|
|
Copyright The ocicrypt Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package pkcs11
|
|
|
|
import (
|
|
"os"
|
|
"runtime"
|
|
"strings"
|
|
"sync"
|
|
|
|
"github.com/pkg/errors"
|
|
)
|
|
|
|
var (
|
|
envLock sync.Mutex
|
|
)
|
|
|
|
// setEnvVars sets the environment variables given in the map and locks the environment from
|
|
// modification with the same function; if successful, you *must* call restoreEnv with the return
|
|
// value from this function
|
|
func setEnvVars(env map[string]string) ([]string, error) {
|
|
envLock.Lock()
|
|
|
|
if len(env) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
oldenv := os.Environ()
|
|
|
|
for k, v := range env {
|
|
err := os.Setenv(k, v)
|
|
if err != nil {
|
|
restoreEnv(oldenv)
|
|
return nil, errors.Wrapf(err, "Could not set environment variable '%s' to '%s'", k, v)
|
|
}
|
|
}
|
|
|
|
return oldenv, nil
|
|
}
|
|
|
|
func arrayToMap(elements []string) map[string]string {
|
|
o := make(map[string]string)
|
|
|
|
for _, element := range elements {
|
|
p := strings.SplitN(element, "=", 2)
|
|
if len(p) == 2 {
|
|
o[p[0]] = p[1]
|
|
}
|
|
}
|
|
|
|
return o
|
|
}
|
|
|
|
// restoreEnv restores the environment to be exactly as given in the array of strings
|
|
// and unlocks the lock
|
|
func restoreEnv(envs []string) {
|
|
if envs != nil && len(envs) >= 0 {
|
|
target := arrayToMap(envs)
|
|
curr := arrayToMap(os.Environ())
|
|
|
|
for nc, vc := range curr {
|
|
vt, ok := target[nc]
|
|
if !ok {
|
|
os.Unsetenv(nc)
|
|
} else if vc == vt {
|
|
delete(target, nc)
|
|
}
|
|
}
|
|
|
|
for nt, vt := range target {
|
|
os.Setenv(nt, vt)
|
|
}
|
|
}
|
|
|
|
envLock.Unlock()
|
|
}
|
|
|
|
func getHostAndOsType() (string, string, string) {
|
|
ht := ""
|
|
ot := ""
|
|
st := ""
|
|
switch runtime.GOOS {
|
|
case "linux":
|
|
ot = "linux"
|
|
st = "gnu"
|
|
switch runtime.GOARCH {
|
|
case "arm":
|
|
ht = "arm"
|
|
case "arm64":
|
|
ht = "aarch64"
|
|
case "amd64":
|
|
ht = "x86_64"
|
|
case "ppc64le":
|
|
ht = "powerpc64le"
|
|
case "s390x":
|
|
ht = "s390x"
|
|
}
|
|
}
|
|
return ht, ot, st
|
|
}
|