Merge pull request #3522 from mheon/nix_the_artifact

Move the HostConfig portion of Inspect inside libpod

1 files changed, 43 insertions, 0 deletions

diff --git a/pkg/util/utils_linux.go b/pkg/util/utils_linux.go
index 47fa1031f..318bd2b1b 100644
--- a/pkg/util/utils_linux.go
+++ b/pkg/util/utils_linux.go
@@ -1,7 +1,14 @@
 package util
 
 import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"syscall"
+
 	"github.com/containers/psgo"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 )
 
 // GetContainerPidInformationDescriptors returns a string slice of all supported
@@ -9,3 +16,39 @@ import (
 func GetContainerPidInformationDescriptors() ([]string, error) {
 	return psgo.ListDescriptors(), nil
 }
+
+// FindDeviceNodes parses /dev/ into a set of major:minor -> path, where
+// [major:minor] is the device's major and minor numbers formatted as, for
+// example, 2:0 and path is the path to the device node.
+// Symlinks to nodes are ignored.
+func FindDeviceNodes() (map[string]string, error) {
+	nodes := make(map[string]string)
+	err := filepath.Walk("/dev", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			logrus.Warnf("Error descending into path %s: %v", path, err)
+			return filepath.SkipDir
+		}
+
+		// If we aren't a device node, do nothing.
+		if info.Mode()&(os.ModeDevice|os.ModeCharDevice) == 0 {
+			return nil
+		}
+
+		// We are a device node. Get major/minor.
+		sysstat, ok := info.Sys().(*syscall.Stat_t)
+		if !ok {
+			return errors.Errorf("Could not convert stat output for use")
+		}
+		major := uint64(sysstat.Rdev / 256)
+		minor := uint64(sysstat.Rdev % 256)
+
+		nodes[fmt.Sprintf("%d:%d", major, minor)] = path
+
+		return nil
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	return nodes, nil
+}