From f60a814e4d9da87ac0dd5835b9a790a0b63f54b3 Mon Sep 17 00:00:00 2001
From: Matthew Heon <matthew.heon@pm.me>
Date: Fri, 18 Oct 2019 13:40:21 -0400
Subject: Add parsing for UID, GID in volume "o" option

Everything else is a flag to mount, but "uid" and "gid" are not.
We need to parse them out of "o" and handle them separately.

Signed-off-by: Matthew Heon <matthew.heon@pm.me>
---
 cmd/podman/shared/volumes_shared.go | 62 +++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

(limited to 'cmd/podman/shared')

diff --git a/cmd/podman/shared/volumes_shared.go b/cmd/podman/shared/volumes_shared.go
index 912615cad..74c0ce011 100644
--- a/cmd/podman/shared/volumes_shared.go
+++ b/cmd/podman/shared/volumes_shared.go
@@ -2,8 +2,13 @@ package shared
 
 import (
 	"context"
+	"strconv"
+	"strings"
 
 	"github.com/containers/libpod/libpod"
+	"github.com/containers/libpod/libpod/define"
+	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 )
 
 // Remove given set of volumes
@@ -45,3 +50,60 @@ func SharedRemoveVolumes(ctx context.Context, runtime *libpod.Runtime, vols []st
 
 	return success, failed, nil
 }
+
+// Handle volume options from CLI.
+// Parse "o" option to find UID, GID.
+func ParseVolumeOptions(opts map[string]string) ([]libpod.VolumeCreateOption, error) {
+	libpodOptions := []libpod.VolumeCreateOption{}
+	volumeOptions := make(map[string]string)
+
+	for key, value := range opts {
+		switch key {
+		case "o":
+			// o has special handling to parse out UID, GID.
+			// These are separate Libpod options.
+			splitVal := strings.Split(value, ",")
+			finalVal := []string{}
+			for _, o := range splitVal {
+				// Options will be formatted as either "opt" or
+				// "opt=value"
+				splitO := strings.SplitN(o, "=", 2)
+				switch strings.ToLower(splitO[0]) {
+				case "uid":
+					if len(splitO) != 2 {
+						return nil, errors.Wrapf(define.ErrInvalidArg, "uid option must provide a UID")
+					}
+					intUID, err := strconv.Atoi(splitO[1])
+					if err != nil {
+						return nil, errors.Wrapf(err, "cannot convert UID %s to integer", splitO[1])
+					}
+					logrus.Debugf("Removing uid= from options and adding WithVolumeUID for UID %d", intUID)
+					libpodOptions = append(libpodOptions, libpod.WithVolumeUID(intUID))
+				case "gid":
+					if len(splitO) != 2 {
+						return nil, errors.Wrapf(define.ErrInvalidArg, "gid option must provide a GID")
+					}
+					intGID, err := strconv.Atoi(splitO[1])
+					if err != nil {
+						return nil, errors.Wrapf(err, "cannot convert GID %s to integer", splitO[1])
+					}
+					logrus.Debugf("Removing gid= from options and adding WithVolumeGID for GID %d", intGID)
+					libpodOptions = append(libpodOptions, libpod.WithVolumeGID(intGID))
+				default:
+					finalVal = append(finalVal, o)
+				}
+			}
+			if len(finalVal) > 0 {
+				volumeOptions[key] = strings.Join(finalVal, ",")
+			}
+		default:
+			volumeOptions[key] = value
+		}
+	}
+
+	if len(volumeOptions) > 0 {
+		libpodOptions = append(libpodOptions, libpod.WithVolumeOptions(volumeOptions))
+	}
+
+	return libpodOptions, nil
+}
-- 
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