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moby--moby/pkg/idtools/utils_unix.go
Phil Estes 6cb8392be9 Add support for looking up user/groups via getent
When processing the --userns-remap flag, add the
capability to call out to `getent` if the user and
group information is not found via local file
parsing code already in libcontainer/user.

Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com>
2016-10-28 19:06:07 -04:00

32 lines
752 B
Go

// +build !windows
package idtools
import (
"fmt"
"os/exec"
"path/filepath"
"strings"
)
func resolveBinary(binname string) (string, error) {
binaryPath, err := exec.LookPath(binname)
if err != nil {
return "", err
}
resolvedPath, err := filepath.EvalSymlinks(binaryPath)
if err != nil {
return "", err
}
//only return no error if the final resolved binary basename
//matches what was searched for
if filepath.Base(resolvedPath) == binname {
return resolvedPath, nil
}
return "", fmt.Errorf("Binary %q does not resolve to a binary of that name in $PATH (%q)", binname, resolvedPath)
}
func execCmd(cmd, args string) ([]byte, error) {
execCmd := exec.Command(cmd, strings.Split(args, " ")...)
return execCmd.CombinedOutput()
}