initial commit before refactor switch

args/args_funcs.go

@@ -0,0 +1,75 @@
+package args
+
+import (
+	`errors`
+	`os/user`
+	`strconv`
+)
+
+// ModesAndOwners returns the evaluated file UID, file GID, dir UID, dir GID, file mode, and dir mode for a UDS socket.
+func (a *Args) ModesAndOwners() (perms UdsPerms, err error) {
+
+	var idInt int
+	var uGid int
+	var u *user.User
+	var g *user.Group
+	var nErr *strconv.NumError = new(strconv.NumError)
+
+	perms.FMode = a.SockMode
+	perms.DMode = a.SockDirMode
+
+	// UID is always this user
+	if u, err = user.Current(); err != nil {
+		return
+	}
+	if perms.UID, err = strconv.Atoi(u.Uid); err != nil {
+		return
+	}
+	if g, err = user.LookupGroupId(u.Gid); err != nil {
+		return
+	}
+	if uGid, err = strconv.Atoi(g.Gid); err != nil {
+		return
+	}
+
+	perms.FGID = uGid
+	if a.SockGrp != nil {
+		// First try a direct GID.
+		if idInt, err = strconv.Atoi(*a.SockGrp); err != nil {
+			if errors.As(err, &nErr) {
+				err = nil
+				// And then try a group name.
+				if g, err = user.LookupGroup(*a.SockGrp); err != nil {
+					return
+				}
+				if idInt, err = strconv.Atoi(g.Gid); err != nil {
+					return
+				}
+			} else {
+				return
+			}
+		}
+		perms.FGID = idInt
+	}
+	perms.DGID = uGid
+	if a.SockDirGrp != nil {
+		// First try a direct GID.
+		if idInt, err = strconv.Atoi(*a.SockDirGrp); err != nil {
+			if errors.As(err, &nErr) {
+				err = nil
+				// And then try a group name.
+				if g, err = user.LookupGroup(*a.SockDirGrp); err != nil {
+					return
+				}
+				if idInt, err = strconv.Atoi(g.Gid); err != nil {
+					return
+				}
+			} else {
+				return
+			}
+		}
+		perms.DGID = idInt
+	}
+
+	return
+}