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Added macOS VSS checks

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Restricts VSS under macOS to version 10.13 High Sierra or higher and local volume only
This commit is contained in:
amarcu5
2018-04-28 23:09:59 +01:00
parent 8a3c5847a8
commit 23b98a3034
1 changed files with 40 additions and 4 deletions
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44
src/duplicacy_shadowcopy_osx.go
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@@ -15,11 +15,32 @@ import (
"context" "context"
"errors" "errors"
"time" "time"
"syscall"
"strconv"
) )
var snapshotPath string var snapshotPath string
var snapshotDate string var snapshotDate string
func GetKernelVersion() (major int, minor int, component int, err error) {
versionString, err := syscall.Sysctl("kern.osrelease")
if err != nil {
return 0, 0, 0, err;
}
versionSplit := strings.Split(versionString, ".")
if len(versionSplit) != 3 {
return 0, 0, 0, errors.New("Sysctl returned invalid kernel version string")
}
major, _ = strconv.Atoi(versionSplit[0])
minor, _ = strconv.Atoi(versionSplit[1])
component, _ = strconv.Atoi(versionSplit[2])
return major, minor, component, nil;
}
func CommandWithTimeout(timeoutInSeconds int, name string, arg ...string) (output string, err error) { func CommandWithTimeout(timeoutInSeconds int, name string, arg ...string) (output string, err error) {
ctx, cancel := context.WithTimeout(context.Background(), time.Duration(timeoutInSeconds) * time.Second) ctx, cancel := context.WithTimeout(context.Background(), time.Duration(timeoutInSeconds) * time.Second)
@@ -67,18 +88,33 @@ func CreateShadowCopy(top string, shadowCopy bool, timeoutInSeconds int) (shadow
return top return top
} }
major, _, _, err := GetKernelVersion()
if err != nil {
LOG_ERROR("VSS_INIT", "Failed to get kernel version: " + err.Error())
return top
}
if major < 17 {
LOG_WARN("VSS_INIT", "VSS requires macOS 10.13 High Sierra or higher")
return top
}
if top == "/Volumes" || strings.HasPrefix(top, "/Volumes/") {
LOG_ERROR("VSS_PATH", "Invalid repository path: %s", top)
return top
}
if timeoutInSeconds <= 60 { if timeoutInSeconds <= 60 {
timeoutInSeconds = 60 timeoutInSeconds = 60
} }
tmpDir, err := ioutil.TempDir("/tmp/", "snp_") snapshotPath, err = ioutil.TempDir("/tmp/", "snp_")
if err != nil { if err != nil {
LOG_ERROR("VSS_CREATE", "Failed to create temporary mount directory") LOG_ERROR("VSS_CREATE", "Failed to create temporary mount directory")
return top return top
} }
snapshotPath = tmpDir
tmutilOutput, err := CommandWithTimeout(timeoutInSeconds, "tmutil", "snapshot", "/") tmutilOutput, err := CommandWithTimeout(timeoutInSeconds, "tmutil", "snapshot")
if err != nil { if err != nil {
LOG_ERROR("VSS_CREATE", "Error while calling tmutil: " + err.Error()) LOG_ERROR("VSS_CREATE", "Error while calling tmutil: " + err.Error())
return top return top
@@ -86,7 +122,7 @@ func CreateShadowCopy(top string, shadowCopy bool, timeoutInSeconds int) (shadow
colonPos := strings.IndexByte(tmutilOutput, ':') colonPos := strings.IndexByte(tmutilOutput, ':')
if colonPos < 0 { if colonPos < 0 {
LOG_ERROR("VSS_CREATE", "Snapshot creation failed") LOG_ERROR("VSS_CREATE", "Snapshot creation failed: " + tmutilOutput)
return top return top
} }
snapshotDate = strings.TrimSpace(tmutilOutput[colonPos+1:]) snapshotDate = strings.TrimSpace(tmutilOutput[colonPos+1:])