Add freebsd-update conf, add doFileExist, getCurrentRcKeyValue and addRcKeyValue, fix zfsGetDatasetByMountpoint and executeCommand output

cmd/utils.go

@@ -25,7 +25,88 @@ const (
 	// Maximum thread qty for start/stop
 	gMaxThreads    = 4
 
-	gDefaultsJson = ` {
+	fbsdUpdateConfig = `# $FreeBSD$
+
+# Trusted keyprint.  Changing this is a Bad Idea unless you've received
+# a PGP-signed email from <security-officer@FreeBSD.org> telling you to
+# change it and explaining why.
+KeyPrint 800651ef4b4c71c27e60786d7b487188970f4b4169cc055784e21eb71d410cc5
+
+# Server or server pool from which to fetch updates.  You can change
+# this to point at a specific server if you want, but in most cases
+# using a "nearby" server won't provide a measurable improvement in
+# performance.
+ServerName update.FreeBSD.org
+
+# Components of the base system which should be kept updated.
+Components world
+
+# Example for updating the userland and the kernel source code only:
+# Components src/base src/sys world
+
+# Paths which start with anything matching an entry in an IgnorePaths
+# statement will be ignored.
+IgnorePaths
+
+# Paths which start with anything matching an entry in an IDSIgnorePaths
+# statement will be ignored by "freebsd-update IDS".
+IDSIgnorePaths /usr/share/man/cat
+IDSIgnorePaths /usr/share/man/whatis
+IDSIgnorePaths /var/db/locate.database
+IDSIgnorePaths /var/log
+
+# Paths which start with anything matching an entry in an UpdateIfUnmodified
+# statement will only be updated if the contents of the file have not been
+# modified by the user (unless changes are merged; see below).
+UpdateIfUnmodified /etc/ /var/ /root/ /.cshrc /.profile
+
+# When upgrading to a new FreeBSD release, files which match MergeChanges
+# will have any local changes merged into the version from the new release.
+MergeChanges /etc/
+
+### Default configuration options:
+
+# Directory in which to store downloaded updates and temporary
+# files used by FreeBSD Update.
+WorkDir /iocage/freebsd-update
+
+# Destination to send output of "freebsd-update cron" if an error
+# occurs or updates have been downloaded.
+# MailTo root
+
+# Is FreeBSD Update allowed to create new files?
+# AllowAdd yes
+
+# Is FreeBSD Update allowed to delete files?
+# AllowDelete yes
+
+# If the user has modified file ownership, permissions, or flags, should
+# FreeBSD Update retain this modified metadata when installing a new version
+# of that file?
+# KeepModifiedMetadata yes
+
+# When upgrading between releases, should the list of Components be
+# read strictly (StrictComponents yes) or merely as a list of components
+# which *might* be installed of which FreeBSD Update should figure out
+# which actually are installed and upgrade those (StrictComponents no)?
+StrictComponents yes
+
+# When installing a new kernel perform a backup of the old one first
+# so it is possible to boot the old kernel in case of problems.
+BackupKernel no
+
+# If BackupKernel is enabled, the backup kernel is saved to this
+# directory.
+# BackupKernelDir /boot/kernel.old
+
+# When backing up a kernel also back up debug symbol files?
+BackupKernelSymbolFiles no
+
+# Create a new boot environment when installing patches
+CreateBootEnv no
+`
+
+	gDefaultsJson = `{
     "CONFIG_VERSION": "27",
     "allow_chflags": 0,
     "allow_mlock": 0,
@@ -79,9 +160,9 @@ const (
     "exec_timeout": "60",
     "host_domainname": "none",
     "host_time": 1,
-       "hostid": "36353536-3135-5a43-4a34-313130315a56",
+    "hostid": "TO-BE-REPLACED-WITH-HOSTID",
     "hostid_strict_check": 0,
-       "interfaces": "vnet0:bridge0",
+    "interfaces": "vnet0:TO-BE-REPLACED-WITH-BRIDGE",
     "ip4": "new",
     "ip4_addr": "none",
     "ip4_saddrsel": 1,
@@ -157,7 +238,7 @@ const (
     "wallclock": "off",
     "writebps": "off",
     "writeiops": "off"
-       }
+}
 `
 )
 
@@ -362,7 +443,7 @@ func executeCommand(cmdline string) (string, error) {
 		out, err = exec.Command(cmd[0]).CombinedOutput()
 	}
 
-	return string(out), err
+	return strings.TrimSuffix(string(out), "\n"), err
 }
 
 /* From iocage: 
@@ -812,7 +893,9 @@ func zfsCreateDataset(dataset, mountpoint, compression string) error {
 }
 // Return dataset name for a given mountpoint
 func zfsGetDatasetByMountpoint(mountpoint string) (string, error) {
-	cmd := fmt.Sprintf("zfs list -p -r -H -o name %s", mountpoint)
+	// We dont want no recursivity
+	//cmd := fmt.Sprintf("zfs list -p -r -H -o name %s", mountpoint)
+	cmd := fmt.Sprintf("zfs list -p -H -o name %s", mountpoint)
 	out, err := executeCommand(cmd)
 	if err != nil {
 		return "", errors.New(fmt.Sprintf("%v; command returned \"%s\"", err, out))
@@ -866,6 +949,17 @@ func getPermissions(path string) (os.FileInfo, error) {
 	return os.Stat(path)
 }
 
+func doFileExist(filePath string) (bool, error) {
+	if _, err := os.Stat(filePath); err != nil {
+		if errors.Is(err, os.ErrNotExist) {
+			return false, nil
+		} else {
+			return false, err
+		}
+	}
+	return true, nil
+}
+
 /*****************************************************************************
  *
  * rc.conf management
@@ -900,6 +994,43 @@ func disableRcKey(rcconfpath string, key string) error {
 	return nil
 }
 
+// returns no error if rc key does not exist
+func getCurrentRcKeyValue(rcconfpath string, key string) (string, error) {
+	cmd := "/usr/sbin/sysrc -a"
+	kvs, err := executeCommand(cmd)
+	if err != nil {
+		return "", err
+	}
+	for _, kv := range strings.Split(string(kvs), "\n") {
+		fmt.Printf("%s\n", kv)
+		if strings.HasPrefix(kv, fmt.Sprintf("%s:", key)) {
+			return strings.TrimPrefix(strings.Join(strings.Split(kv, ":")[1:], ":"), " "), nil
+		}
+	}
+
+	return "", nil
+}
+
+// Add a value to current existing key value
+func addRcKeyValue(rcconfpath string, key string, value string) error {
+	var nv string
+	cv, err := getCurrentRcKeyValue(rcconfpath, key)
+	if err != nil {
+		return err
+	}
+	if len(cv) > 0 {
+		log.Debugf("Current value of %s: %s\n", key, cv)
+		nv = fmt.Sprintf("\"%s %s\"", cv, value)
+	} else {
+		nv = fmt.Sprintf("\"%s\"", value)
+	}
+	cmd := fmt.Sprintf("/usr/sbin/sysrc -f %s %s=%s", rcconfpath, key, nv)
+	_, err = executeCommand(cmd)
+	if err != nil {
+		return err
+	}
+	return nil
+}
 /*****************************************************************************
 * Parse an fstab file, returning an array of Mount
 *****************************************************************************/