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|
package rootless
import (
"fmt"
"github.com/containers/storage/pkg/idtools"
"os"
"os/exec"
)
/*
extern int reexec_in_user_namespace(int ready);
extern int reexec_in_user_namespace_wait(int pid);
*/
import "C"
func runInUser() error {
os.Setenv("_LIBPOD_USERNS_CONFIGURED", "done")
return nil
}
func tryMappingTool(tool string, pid int, hostID int, mappings []idtools.IDMap) error {
path, err := exec.LookPath(tool)
if err != nil {
return err
}
appendTriplet := func(l []string, a, b, c int) []string {
return append(l, fmt.Sprintf("%d", a), fmt.Sprintf("%d", b), fmt.Sprintf("%d", c))
}
args := []string{path, fmt.Sprintf("%d", pid)}
args = appendTriplet(args, 0, hostID, 1)
if mappings != nil {
for _, i := range mappings {
args = appendTriplet(args, i.ContainerID+1, i.HostID, i.Size)
}
}
cmd := exec.Cmd{
Path: path,
Args: args,
}
return cmd.Run()
}
|
