config: fix file/folder ownership

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

vendor/github.com/tonistiigi/dchapes-mode/bits.go

@@ -0,0 +1,76 @@
+package mode
+
+import "os"
+
+type modet uint16
+
+// Although many of these can be found in the syscall package
+// we don't use those to avoid the dependency, add some more
+// values, use non-exported Go names, and use octal for better clarity.
+//
+// Note that Go only uses the the nine least significant bits as "Unix
+// permission bits" (os.ModePerm == 0777). We use chmod(1)'s octal
+// definitions that include three further bits: isUID, isGID, and
+// isTXT (07000). Go has os.ModeSetuid=1<<23, os.ModeSetgid=1<<22,
+// and os.ModeSticy=1<<20 for these. We do this so that absolute
+// octal values can include those bits as defined by chmod(1).
+const (
+	//ifDir   = 040000 // directory
+	isUID   = 04000 // set user id on execution
+	isGID   = 02000 // set group id on execution
+	isTXT   = 01000 // sticky bit
+	iRWXU   = 00700 // RWX mask for owner
+	iRUser  = 00400 // R for owner
+	iWUser  = 00200 // W for owner
+	iXUser  = 00100 // X for owner
+	iRWXG   = 00070 // RWX mask for group
+	iRGroup = 00040 // R for group
+	iWGroup = 00020 // W for group
+	iXGroup = 00010 // X for group
+	iRWXO   = 00007 // RWX mask for other
+	iROther = 00004 // R for other
+	iWOther = 00002 // W for other
+	iXOther = 00001 // X for other
+
+	standardBits = isUID | isGID | iRWXU | iRWXG | iRWXO
+
+	// os.FileMode bits we touch
+	fmBits = os.ModeSetuid | os.ModeSetgid | os.ModeSticky | os.ModePerm
+)
+
+func fileModeToBits(fm os.FileMode) modet {
+	m := modet(fm.Perm())
+	/*
+		if fm&os.ModeSetuid != 0 {
+			m |= isUID
+		}
+		if fm&os.ModeSetgid != 0 {
+			m |= isGID
+		}
+		if fm&os.ModeSticky != 0 {
+			m |= isTXT
+		}
+	*/
+	m |= modet(fm & (os.ModeSetuid | os.ModeSetgid) >> 12)
+	m |= modet(fm & os.ModeSticky >> 11)
+	return m
+}
+
+func bitsToFileMode(old os.FileMode, m modet) os.FileMode {
+	fm := old &^ fmBits
+	fm |= os.FileMode(m) & os.ModePerm
+	/*
+		if m&isUID != 0 {
+			fm |= os.ModeSetuid
+		}
+		if m&isGID != 0 {
+			fm |= os.ModeSetgid
+		}
+		if m&isTXT != 0 {
+			fm |= os.ModeSticky
+		}
+	*/
+	fm |= os.FileMode(m&(isUID|isGID)) << 12
+	fm |= os.FileMode(m&isTXT) << 11
+	return fm
+}