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//go:build linux && cgo
package idmap
import (
"fmt"
"strconv"
"strings"
)
// ParseRawIdmap parses an IDMAP string.
func ParseRawIdmap(value string) ([]IdmapEntry, error) {
getRange := func(r string) (int64, int64, error) {
entries := strings.Split(r, "-")
if len(entries) > 2 {
return -1, -1, fmt.Errorf("Invalid ID Map range %q", r)
}
base, err := strconv.ParseInt(entries[0], 10, 64)
if err != nil {
return -1, -1, err
}
size := int64(1)
if len(entries) > 1 {
size, err = strconv.ParseInt(entries[1], 10, 64)
if err != nil {
return -1, -1, err
}
size -= base
size++
}
return base, size, nil
}
ret := IdmapSet{}
for _, line := range strings.Split(value, "\n") {
if line == "" {
continue
}
entries := strings.Split(line, " ")
if len(entries) != 3 {
return nil, fmt.Errorf("Invalid ID map line %q", line)
}
outsideBase, outsideSize, err := getRange(entries[1])
if err != nil {
return nil, err
}
insideBase, insideSize, err := getRange(entries[2])
if err != nil {
return nil, err
}
if insideSize != outsideSize {
return nil, fmt.Errorf("The ID map ranges are of different sizes %q", line)
}
entry := IdmapEntry{
Hostid: outsideBase,
Nsid: insideBase,
Maprange: insideSize,
}
switch entries[0] {
case "both":
entry.Isuid = true
entry.Isgid = true
err := ret.AddSafe(entry)
if err != nil {
return nil, err
}
case "uid":
entry.Isuid = true
err := ret.AddSafe(entry)
if err != nil {
return nil, err
}
case "gid":
entry.Isgid = true
err := ret.AddSafe(entry)
if err != nil {
return nil, err
}
default:
return nil, fmt.Errorf("Invalid ID map type %q", line)
}
}
return ret.Idmap, nil
}
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