mirror of
https://github.com/containers/podman.git
synced 2025-06-19 00:06:43 +08:00
f5b7bdac0c
Lots of fixes for issues found by podman. overlay: propagate errors from mountProgram utils: root in a userns uses global conf file Fix handling of additional stores Correctly check permissions on rootless directory Fix possible integer overflow on 32bit builds Evaluate device path for lvm lockfile test: make concurrent RW test determinisitc lockfile test: make concurrent read tests deterministic Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package idtools
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import (
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"fmt"
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"math"
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"math/bits"
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"strconv"
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"strings"
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)
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func nonDigitsToWhitespace(r rune) rune {
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if !strings.ContainsRune("0123456789", r) {
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return ' '
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}
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return r
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}
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func parseTriple(spec []string) (container, host, size uint32, err error) {
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cid, err := strconv.ParseUint(spec[0], 10, 32)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing id map value %q: %v", spec[0], err)
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}
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hid, err := strconv.ParseUint(spec[1], 10, 32)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing id map value %q: %v", spec[1], err)
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}
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sz, err := strconv.ParseUint(spec[2], 10, 32)
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if err != nil {
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return 0, 0, 0, fmt.Errorf("error parsing id map value %q: %v", spec[2], err)
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}
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return uint32(cid), uint32(hid), uint32(sz), nil
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}
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// ParseIDMap parses idmap triples from string.
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func ParseIDMap(mapSpec []string, mapSetting string) (idmap []IDMap, err error) {
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stdErr := fmt.Errorf("error initializing ID mappings: %s setting is malformed", mapSetting)
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for _, idMapSpec := range mapSpec {
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idSpec := strings.Fields(strings.Map(nonDigitsToWhitespace, idMapSpec))
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if len(idSpec)%3 != 0 {
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return nil, stdErr
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}
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for i := range idSpec {
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if i%3 != 0 {
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continue
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}
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cid, hid, size, err := parseTriple(idSpec[i : i+3])
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if err != nil {
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return nil, stdErr
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}
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// Avoid possible integer overflow on 32bit builds
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if bits.UintSize == 32 && (cid > math.MaxInt32 || hid > math.MaxInt32 || size > math.MaxInt32) {
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return nil, stdErr
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}
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mapping := IDMap{
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ContainerID: int(cid),
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HostID: int(hid),
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Size: int(size),
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}
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idmap = append(idmap, mapping)
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}
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}
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return idmap, nil
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}
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