Return information about mount_program (fuse-overlayfs)

We want to get podman info to tell us about the version of
the mount program to help us diagnose issues users are having.

Also if in rootless mode and slirp4netns is installed reveal package
info on slirp4netns.

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

1 files changed, 37 insertions, 0 deletions

diff --git a/libpod/util.go b/libpod/util.go
index 164800af4..84fd490bf 100644
--- a/libpod/util.go
+++ b/libpod/util.go
@@ -3,6 +3,7 @@ package libpod
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sort"
 	"strconv"
@@ -10,6 +11,7 @@ import (
 	"time"
 
 	"github.com/containers/libpod/libpod/define"
+	"github.com/containers/libpod/utils"
 	"github.com/fsnotify/fsnotify"
 	spec "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
@@ -20,6 +22,8 @@ const (
 	// DefaultTransport is a prefix that we apply to an image name
 	// to check docker hub first for the image
 	DefaultTransport = "docker://"
+
+	unknownPackage = "Unknown"
 )
 
 // FuncTimer helps measure the execution time of a function
@@ -152,3 +156,36 @@ func JSONDeepCopy(from, to interface{}) error {
 	}
 	return json.Unmarshal(tmp, to)
 }
+
+func dpkgVersion(path string) string {
+	output := unknownPackage
+	cmd := exec.Command("/usr/bin/dpkg", "-S", path)
+	if outp, err := cmd.Output(); err == nil {
+		output = string(outp)
+	}
+	return strings.Trim(output, "\n")
+}
+
+func rpmVersion(path string) string {
+	output := unknownPackage
+	cmd := exec.Command("/usr/bin/rpm", "-q", "-f", path)
+	if outp, err := cmd.Output(); err == nil {
+		output = string(outp)
+	}
+	return strings.Trim(output, "\n")
+}
+
+func packageVersion(program string) string {
+	if out := rpmVersion(program); out != unknownPackage {
+		return out
+	}
+	return dpkgVersion(program)
+}
+
+func programVersion(mountProgram string) (string, error) {
+	output, err := utils.ExecCmd(mountProgram, "--version")
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSuffix(output, "\n"), nil
+}