beta6

.github/workflows/regression.yml

@@ -17,7 +17,7 @@ jobs:
 
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
+        run: sudo apt update && sudo apt install zfsutils-linux lzop pigz zstd gzip xz-utils lz4 && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
 
 
       - name: Regression test
@@ -39,7 +39,7 @@ jobs:
 
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux python3-setuptools && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
+        run: sudo apt update && sudo apt install zfsutils-linux python3-setuptools lzop pigz zstd gzip xz-utils liblz4-tool && sudo -H pip3 install coverage unittest2 mock==3.0.5 coveralls
 
 
       - name: Regression test
@@ -64,7 +64,7 @@ jobs:
           python-version: '2.x'
 
       - name: Prepare
-        run: sudo apt update && sudo apt install zfsutils-linux python-setuptools && sudo -H pip install coverage unittest2 mock==3.0.5 coveralls colorama
+        run: sudo apt update && sudo apt install zfsutils-linux python-setuptools lzop pigz zstd gzip xz-utils liblz4-tool && sudo -H pip install coverage unittest2 mock==3.0.5 coveralls colorama
 
       - name: Regression test
         run: sudo -E ./tests/run_tests

README.md

@@ -64,6 +64,8 @@ The recommended way on most servers is to use [pip](https://pypi.org/project/zfs
 
 This can also be used to upgrade zfs-autobackup to the newest stable version.
 
+To install the latest beta version add the `--pre` option.
+
 ### Using easy_install
 
 On older servers you might have to use easy_install

tests/test_cmdpipe.py

@@ -1,5 +1,5 @@
 from basetest import *
-from zfs_autobackup.CmdPipe import CmdPipe
+from zfs_autobackup.CmdPipe import CmdPipe,CmdItem
 
 
 class TestCmdPipe(unittest2.TestCase):
@@ -9,24 +9,24 @@ class TestCmdPipe(unittest2.TestCase):
         p=CmdPipe(readonly=False, inp=None)
         err=[]
         out=[]
-        p.add(["ls", "-d", "/", "/", "/nonexistent"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2))
+        p.add(CmdItem(["ls", "-d", "/", "/", "/nonexistent"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err, ["ls: cannot access '/nonexistent': No such file or directory"])
         self.assertEqual(out, ["/","/"])
-        self.assertTrue(executed)
+        self.assertIsNone(executed)
 
     def test_input(self):
         """test stdinput"""
         p=CmdPipe(readonly=False, inp="test")
         err=[]
         out=[]
-        p.add(["echo", "test"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0))
+        p.add(CmdItem(["echo", "test"], stderr_handler=lambda line: err.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err, [])
         self.assertEqual(out, ["test"])
-        self.assertTrue(executed)
+        self.assertIsNone(executed)
 
     def test_pipe(self):
         """test piped"""
@@ -35,16 +35,16 @@ class TestCmdPipe(unittest2.TestCase):
         err2=[]
         err3=[]
         out=[]
-        p.add(["echo", "test"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0))
-        p.add(["tr", "e", "E"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0))
-        p.add(["tr", "t", "T"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0))
+        p.add(CmdItem(["echo", "test"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        p.add(CmdItem(["tr", "e", "E"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
+        p.add(CmdItem(["tr", "t", "T"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,0)))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err1, [])
         self.assertEqual(err2, [])
         self.assertEqual(err3, [])
         self.assertEqual(out, ["TEsT"])
-        self.assertTrue(executed)
+        self.assertIsNone(executed)
 
         #test str representation as well
         self.assertEqual(str(p), "(echo test) | (tr e E) | (tr t T)")
@@ -56,16 +56,16 @@ class TestCmdPipe(unittest2.TestCase):
         err2=[]
         err3=[]
         out=[]
-        p.add(["ls", "/nonexistent1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2))
-        p.add(["ls", "/nonexistent2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2))
-        p.add(["ls", "/nonexistent3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2))
+        p.add(CmdItem(["ls", "/nonexistent1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["ls", "/nonexistent2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["ls", "/nonexistent3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err1, ["ls: cannot access '/nonexistent1': No such file or directory"])
         self.assertEqual(err2, ["ls: cannot access '/nonexistent2': No such file or directory"])
         self.assertEqual(err3, ["ls: cannot access '/nonexistent3': No such file or directory"])
         self.assertEqual(out, [])
-        self.assertTrue(executed)
+        self.assertIsNone(executed)
 
     def test_exitcode(self):
         """test piped exitcodes """
@@ -74,16 +74,16 @@ class TestCmdPipe(unittest2.TestCase):
         err2=[]
         err3=[]
         out=[]
-        p.add(["bash", "-c", "exit 1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,1))
-        p.add(["bash", "-c", "exit 2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2))
-        p.add(["bash", "-c", "exit 3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,3))
+        p.add(CmdItem(["bash", "-c", "exit 1"], stderr_handler=lambda line: err1.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,1)))
+        p.add(CmdItem(["bash", "-c", "exit 2"], stderr_handler=lambda line: err2.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,2)))
+        p.add(CmdItem(["bash", "-c", "exit 3"], stderr_handler=lambda line: err3.append(line), exit_handler=lambda exit_code: self.assertEqual(exit_code,3)))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err1, [])
         self.assertEqual(err2, [])
         self.assertEqual(err3, [])
         self.assertEqual(out, [])
-        self.assertTrue(executed)
+        self.assertIsNone(executed)
 
     def test_readonly_execute(self):
         """everything readonly, just should execute"""
@@ -92,16 +92,18 @@ class TestCmdPipe(unittest2.TestCase):
         err1=[]
         err2=[]
         out=[]
-        p.add(["echo", "test1"], stderr_handler=lambda line: err1.append(line), readonly=True)
-        p.add(["echo", "test2"], stderr_handler=lambda line: err2.append(line), readonly=True)
+
+        def true_exit(exit_code):
+            return True
+
+        p.add(CmdItem(["echo", "test1"], stderr_handler=lambda line: err1.append(line), exit_handler=true_exit, readonly=True))
+        p.add(CmdItem(["echo", "test2"], stderr_handler=lambda line: err2.append(line), exit_handler=true_exit, readonly=True))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err1, [])
         self.assertEqual(err2, [])
         self.assertEqual(out, ["test2"])
         self.assertTrue(executed)
-        self.assertEqual(p.items[0]['process'].returncode,0)
-        self.assertEqual(p.items[1]['process'].returncode,0)
 
     def test_readonly_skip(self):
         """one command not readonly, skip"""
@@ -110,12 +112,12 @@ class TestCmdPipe(unittest2.TestCase):
         err1=[]
         err2=[]
         out=[]
-        p.add(["echo", "test1"], stderr_handler=lambda line: err1.append(line), readonly=False)
-        p.add(["echo", "test2"], stderr_handler=lambda line: err2.append(line), readonly=True)
+        p.add(CmdItem(["echo", "test1"], stderr_handler=lambda line: err1.append(line), readonly=False))
+        p.add(CmdItem(["echo", "test2"], stderr_handler=lambda line: err2.append(line), readonly=True))
         executed=p.execute(stdout_handler=lambda line: out.append(line))
 
         self.assertEqual(err1, [])
         self.assertEqual(err2, [])
         self.assertEqual(out, [])
-        self.assertFalse(executed)
+        self.assertTrue(executed)
 

tests/test_executenode.py

@@ -26,9 +26,9 @@ class TestExecuteNode(unittest2.TestCase):
         with self.subTest("multiline tabsplit"):
             self.assertEqual(node.run(["echo","l1c1\tl1c2\nl2c1\tl2c2"], tab_split=True), [['l1c1', 'l1c2'], ['l2c1', 'l2c2']])
 
-        #escaping test (shouldnt be a problem locally, single quotes can be a problem remote via ssh)
+        #escaping test
         with self.subTest("escape test"):
-            s="><`'\"@&$()$bla\\/.*!#test _+-={}[]|"
+            s="><`'\"@&$()$bla\\/.* !#test _+-={}[]|${bla} $bla"
             self.assertEqual(node.run(["echo",s]), [s])
 
         #return std err as well, trigger stderr by listing something non existing
@@ -51,6 +51,15 @@ class TestExecuteNode(unittest2.TestCase):
         with self.subTest("stdin process with inp=None (shouldn't hang)"):
             self.assertEqual(node.run(["cat"]), [])
 
+        # let the system do the piping with an unescaped |:
+        with self.subTest("system piping test"):
+
+            #first make sure the actual | character is still properly escaped:
+            self.assertEqual(node.run(["echo","|"]), ["|"])
+
+            #now pipe
+            self.assertEqual(node.run(["echo", "abc", node.PIPE, "tr", "a", "A" ]), ["Abc"])
+
     def test_basics_local(self):
         node=ExecuteNode(debug_output=True)
         self.basics(node)

tests/test_sendrecvpipes.py

@@ -0,0 +1,49 @@
+import zfs_autobackup.compressors
+from basetest import *
+import time
+
+class TestSendRecvPipes(unittest2.TestCase):
+    """test input/output pipes for zfs send and recv"""
+
+    def setUp(self):
+        prepare_zpools()
+        self.longMessage=True
+
+
+
+    def test_send_basics(self):
+        """send basics (remote/local send pipe)"""
+
+
+        with self.subTest("local local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote local pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("local remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+            shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")
+
+        with self.subTest("remote remote pipe"):
+            with patch('time.strftime', return_value="20101111000000"):
+                self.assertFalse(ZfsAutobackup(["test", "test_target1",  "--exclude-received", "--no-holds", "--no-progress", "--ssh-source=localhost", "--ssh-target=localhost", "--send-pipe=dd bs=1M",  "--recv-pipe=dd bs=2M"]).run())
+
+    def test_compress(self):
+        """send basics (remote/local send pipe)"""
+
+        for compress in zfs_autobackup.compressors.COMPRESS_CMDS.keys():
+
+            with self.subTest("compress "+compress):
+                with patch('time.strftime', return_value="20101111000000"):
+                    self.assertFalse(ZfsAutobackup(["test", "test_target1", "--exclude-received", "--no-holds", "--no-progress", "--compress="+compress]).run())
+
+                shelltest("zfs destroy -r test_target1/test_source1/fs1/sub")

tests/test_zfsautobackup.py

@@ -890,7 +890,7 @@ test_target1/test_source2/fs2/sub@test-20101111000003
         n=ZfsNode("test",l)
         d=ZfsDataset(n,"test_source1@test")
 
-        sp=d.send_pipe([], prev_snapshot=None, resume_token=None, show_progress=True, raw=False, output_pipes=[], send_properties=True, write_embedded=True)
+        sp=d.send_pipe([], prev_snapshot=None, resume_token=None, show_progress=True, raw=False, send_pipes=[], send_properties=True, write_embedded=True)
 
 
         with OutputIO() as buf:

tests/test_zfsautobackup31.py

@@ -2,6 +2,7 @@ from basetest import *
 import time
 
 class TestZfsAutobackup31(unittest2.TestCase):
+    """various new 3.1 features"""
 
     def setUp(self):
         prepare_zpools()

zfs_autobackup/CmdPipe.py

@@ -2,6 +2,49 @@ import subprocess
 import os
 import select
 
+try:
+    from shlex import quote as cmd_quote
+except ImportError:
+    from pipes import quote as cmd_quote
+
+
+class CmdItem:
+    """one command item, to be added to a CmdPipe"""
+
+    def __init__(self, cmd, readonly=False, stderr_handler=None, exit_handler=None, shell=False):
+        """create item. caller has to make sure cmd is properly escaped when using shell.
+        :type cmd: list of str
+        """
+
+        self.cmd = cmd
+        self.readonly = readonly
+        self.stderr_handler = stderr_handler
+        self.exit_handler = exit_handler
+        self.shell = shell
+        self.process = None
+
+    def __str__(self):
+        """return copy-pastable version of command."""
+        if self.shell:
+            # its already copy pastable for a shell:
+            return " ".join(self.cmd)
+        else:
+            # make it copy-pastable, will make a mess of quotes sometimes, but is correct
+            return " ".join(map(cmd_quote, self.cmd))
+
+    def create(self, stdin):
+        """actually create the subprocess (called by CmdPipe)"""
+
+        # make sure the command gets all the data in utf8 format:
+        # (this is necessary if LC_ALL=en_US.utf8 is not set in the environment)
+        encoded_cmd = []
+        for arg in self.cmd:
+            encoded_cmd.append(arg.encode('utf-8'))
+
+        self.process = subprocess.Popen(encoded_cmd, env=os.environ, stdout=subprocess.PIPE, stdin=stdin,
+                                        stderr=subprocess.PIPE, shell=self.shell)
+
+
 class CmdPipe:
     """a pipe of one or more commands. also takes care of utf-8 encoding/decoding and line based parsing"""
 
@@ -17,42 +60,35 @@ class CmdPipe:
         self.readonly = readonly
         self._should_execute = True
 
-    def add(self, cmd, readonly=False, stderr_handler=None, exit_handler=None):
-        """adds a command to pipe"""
+    def add(self, cmd_item):
+        """adds a CmdItem to pipe.
+        :type cmd_item: CmdItem
+        """
 
-        self.items.append({
-            'cmd': cmd,
-            'stderr_handler': stderr_handler,
-            'exit_handler': exit_handler
-        })
+        self.items.append(cmd_item)
 
-        if not readonly and self.readonly:
+        if not cmd_item.readonly and self.readonly:
             self._should_execute = False
 
     def __str__(self):
-        """transform into oneliner for debugging and testing """
+        """transform whole pipe into oneliner for debugging and testing. this should generate a copy-pastable string for in a console """
 
-        #just one command?
-        if len(self.items)==1:
-            return " ".join(self.items[0]['cmd'])
-
-        #an actual pipe
         ret = ""
         for item in self.items:
             if ret:
                 ret = ret + " | "
-            ret = ret + "(" + " ".join(item['cmd']) + ")"
+            ret = ret + "({})".format(item)  # this will do proper escaping to make it copypastable
 
         return ret
 
     def should_execute(self):
-        return(self._should_execute)
+        return self._should_execute
 
     def execute(self, stdout_handler):
-        """run the pipe. returns True if it executed, and false if it skipped due to readonly conditions"""
+        """run the pipe. returns True all exit handlers returned true"""
 
         if not self._should_execute:
-            return False
+            return True
 
         # first process should have actual user input as stdin:
         selectors = []
@@ -62,29 +98,21 @@ class CmdPipe:
         stdin = subprocess.PIPE
         for item in self.items:
 
-            # make sure the command gets all the data in utf8 format:
-            # (this is necessary if LC_ALL=en_US.utf8 is not set in the environment)
-            encoded_cmd = []
-            for arg in item['cmd']:
-                encoded_cmd.append(arg.encode('utf-8'))
-
-            item['process'] = subprocess.Popen(encoded_cmd, env=os.environ, stdout=subprocess.PIPE, stdin=stdin,
-                                               stderr=subprocess.PIPE)
-
-            selectors.append(item['process'].stderr)
+            item.create(stdin)
+            selectors.append(item.process.stderr)
 
             if last_stdout is None:
                 # we're the first process in the pipe, do we have some input?
                 if self.inp is not None:
                     # TODO: make streaming to support big inputs?
-                    item['process'].stdin.write(self.inp.encode('utf-8'))
-                item['process'].stdin.close()
+                    item.process.stdin.write(self.inp.encode('utf-8'))
+                item.process.stdin.close()
             else:
-                #last stdout was piped to this stdin already, so close it because we dont need it anymore
+                # last stdout was piped to this stdin already, so close it because we dont need it anymore
                 last_stdout.close()
 
-            last_stdout = item['process'].stdout
-            stdin=last_stdout
+            last_stdout = item.process.stdout
+            stdin = last_stdout
 
         # monitor last stdout as well
         selectors.append(last_stdout)
@@ -104,29 +132,29 @@ class CmdPipe:
                     eof_count = eof_count + 1
 
             for item in self.items:
-                if item['process'].stderr in read_ready:
-                    line = item['process'].stderr.readline().decode('utf-8').rstrip()
+                if item.process.stderr in read_ready:
+                    line = item.process.stderr.readline().decode('utf-8').rstrip()
                     if line != "":
-                        item['stderr_handler'](line)
+                        item.stderr_handler(line)
                     else:
                         eof_count = eof_count + 1
 
-                if item['process'].poll() is not None:
+                if item.process.poll() is not None:
                     done_count = done_count + 1
 
             # all filehandles are eof and all processes are done (poll() is not None)
             if eof_count == len(selectors) and done_count == len(self.items):
                 break
 
-        #close filehandles
+        # close filehandles
         last_stdout.close()
         for item in self.items:
-            item['process'].stderr.close()
+            item.process.stderr.close()
 
-        #call exit handlers
+        # call exit handlers
+        success = True
         for item in self.items:
-            if item['exit_handler'] is not None:
-                item['exit_handler'](item['process'].returncode)
+            if item.exit_handler is not None:
+                success=item.exit_handler(item.process.returncode) and success
 
-
-        return True
+        return success

zfs_autobackup/ExecuteNode.py

@@ -1,16 +1,24 @@
 import os
 import select
 import subprocess
-
-from zfs_autobackup.CmdPipe import CmdPipe
+from zfs_autobackup.CmdPipe import CmdPipe, CmdItem
 from zfs_autobackup.LogStub import LogStub
 
+try:
+    from shlex import quote as cmd_quote
+except ImportError:
+    from pipes import quote as cmd_quote
+
+
 class ExecuteError(Exception):
     pass
 
+
 class ExecuteNode(LogStub):
     """an endpoint to execute local or remote commands via ssh"""
 
+    PIPE=1
+
     def __init__(self, ssh_config=None, ssh_to=None, readonly=False, debug_output=False):
         """ssh_config: custom ssh config
            ssh_to: server you want to ssh to. none means local
@@ -41,48 +49,43 @@ class ExecuteNode(LogStub):
         else:
             self.error("STDERR > " + line.rstrip())
 
-    # def _parse_stderr_pipe(self, line, hide_errors):
-    #     """parse stderr from pipe input process. can be overridden in subclass"""
-    #     if hide_errors:
-    #         self.debug("STDERR|> " + line.rstrip())
-    #     else:
-    #         self.error("STDERR|> " + line.rstrip())
+    def _quote(self, cmd):
+        """return quoted version of command. if it has value PIPE it will add an actual | """
+        if cmd==self.PIPE:
+            return('|')
+        else:
+            return(cmd_quote(cmd))
 
-    def _remote_cmd(self, cmd):
-        """transforms cmd in correct form for remote over ssh, if needed"""
+    def _shell_cmd(self, cmd):
+        """prefix specified ssh shell to command and escape shell characters"""
 
-        # use ssh?
-        if self.ssh_to is not None:
-            encoded_cmd = []
-            encoded_cmd.append("ssh")
+        ret=[]
+
+        #add remote shell
+        if not self.is_local():
+            ret=["ssh"]
 
             if self.ssh_config is not None:
-                encoded_cmd.extend(["-F", self.ssh_config])
+                ret.extend(["-F", self.ssh_config])
 
-            encoded_cmd.append(self.ssh_to)
+            ret.append(self.ssh_to)
 
-            for arg in cmd:
-                # add single quotes for remote commands to support spaces and other weird stuff (remote commands are
-                # executed in a shell) and escape existing single quotes (bash needs ' to end the quoted string,
-                # then a \' for the actual quote and then another ' to start a new quoted string) (and then python
-                # needs the double \ to get a single \)
-                encoded_cmd.append(("'" + arg.replace("'", "'\\''") + "'"))
-
-            return encoded_cmd
-        else:
-            return(cmd)
+        ret.append(" ".join(map(self._quote, cmd)))
 
+        return ret
 
     def is_local(self):
         return self.ssh_to is None
 
-
     def run(self, cmd, inp=None, tab_split=False, valid_exitcodes=None, readonly=False, hide_errors=False,
             return_stderr=False, pipe=False):
         """run a command on the node , checks output and parses/handle output and returns it
 
+        Either uses a local shell (sh -c) or remote shell (ssh) to execute the command. Therefore the command can have stuff like actual pipes in it, if you dont want to use pipe=True to pipe stuff.
+
         :param cmd: the actual command, should be a list, where the first item is the command
-                    and the rest are parameters.
+                    and the rest are parameters. use ExecuteNode.PIPE to add an unescaped |
+                    (if you want to use system piping instead of python piping)
         :param pipe: return CmdPipe instead of executing it.
         :param inp: Can be None, a string or a CmdPipe that was previously returned.
         :param tab_split: split tabbed files in output into a list
@@ -96,13 +99,14 @@ class ExecuteNode(LogStub):
 
         # create new pipe?
         if not isinstance(inp, CmdPipe):
-            p = CmdPipe(self.readonly, inp)
+            cmd_pipe = CmdPipe(self.readonly, inp)
         else:
             # add stuff to existing pipe
-            p = inp
+            cmd_pipe = inp
 
         # stderr parser
         error_lines = []
+
         def stderr_handler(line):
             if tab_split:
                 error_lines.append(line.rstrip().split('\t'))
@@ -119,18 +123,22 @@ class ExecuteNode(LogStub):
                 self.debug("EXIT   > {}".format(exit_code))
 
             if (valid_exitcodes != []) and (exit_code not in valid_exitcodes):
-             raise (ExecuteError("Command '{}' returned exit code {} (valid codes: {})".format(" ".join(cmd), exit_code, valid_exitcodes)))
+                self.error("Command \"{}\" returned exit code {} (valid codes: {})".format(cmd_item, exit_code, valid_exitcodes))
+                return False
 
-        # add command to pipe
-        encoded_cmd = self._remote_cmd(cmd)
-        p.add(cmd=encoded_cmd, readonly=readonly, stderr_handler=stderr_handler, exit_handler=exit_handler)
+            return True
+
+        # add shell command and handlers to pipe
+        cmd_item=CmdItem(cmd=self._shell_cmd(cmd), readonly=readonly, stderr_handler=stderr_handler, exit_handler=exit_handler, shell=self.is_local())
+        cmd_pipe.add(cmd_item)
 
         # return pipe instead of executing?
         if pipe:
-            return p
+            return cmd_pipe
 
         # stdout parser
         output_lines = []
+
         def stdout_handler(line):
             if tab_split:
                 output_lines.append(line.rstrip().split('\t'))
@@ -138,13 +146,14 @@ class ExecuteNode(LogStub):
                 output_lines.append(line.rstrip())
             self._parse_stdout(line)
 
-        if p.should_execute():
-            self.debug("CMD    > {}".format(p))
+        if cmd_pipe.should_execute():
+            self.debug("CMD    > {}".format(cmd_pipe))
         else:
-            self.debug("CMDSKIP> {}".format(p))
+            self.debug("CMDSKIP> {}".format(cmd_pipe))
 
         # execute and calls handlers in CmdPipe
-        p.execute(stdout_handler=stdout_handler)
+        if not cmd_pipe.execute(stdout_handler=stdout_handler):
+            raise(ExecuteError("Last command returned error"))
 
         if return_stderr:
             return output_lines, error_lines

zfs_autobackup/LogConsole.py

@@ -31,6 +31,13 @@ class LogConsole:
             print("! " + txt, file=sys.stderr)
         sys.stderr.flush()
 
+    def warning(self, txt):
+        if self.colorama:
+            print(colorama.Fore.YELLOW + colorama.Style.BRIGHT + "  NOTE: " + txt + colorama.Style.RESET_ALL)
+        else:
+            print("  NOTE: " + txt)
+        sys.stdout.flush()
+
     def verbose(self, txt):
         if self.show_verbose:
             if self.colorama:

zfs_autobackup/LogStub.py

@@ -11,5 +11,8 @@ class LogStub:
     def verbose(self, txt):
         print("VERBOSE: " + txt)
 
+    def warning(self, txt):
+        print("WARNING: " + txt)
+
     def error(self, txt):
         print("ERROR  : " + txt)

zfs_autobackup/ZfsAutobackup.py

@@ -2,6 +2,8 @@ import argparse
 import sys
 import time
 
+from zfs_autobackup import compressors
+from zfs_autobackup.ExecuteNode import ExecuteNode
 from zfs_autobackup.Thinner import Thinner
 from zfs_autobackup.ZfsDataset import ZfsDataset
 from zfs_autobackup.LogConsole import LogConsole
@@ -9,10 +11,12 @@ from zfs_autobackup.ZfsNode import ZfsNode
 from zfs_autobackup.ThinnerRule import ThinnerRule
 
 
+
+
 class ZfsAutobackup:
     """main class"""
 
-    VERSION = "3.1-beta5"
+    VERSION = "3.1-beta6"
     HEADER = "zfs-autobackup v{} - (c)2021 E.H.Eefting (edwin@datux.nl)".format(VERSION)
 
     def __init__(self, argv, print_arguments=True):
@@ -108,17 +112,22 @@ class ZfsAutobackup:
         parser.add_argument('--no-progress', action='store_true',
                             help=argparse.SUPPRESS)  # needed to workaround a zfs recv -v bug
 
-        parser.add_argument('--send-pipe', metavar="COMMAND", default=[], action='append',
-                            help='pipe zfs send output through COMMAND')
-
-        parser.add_argument('--recv-pipe', metavar="COMMAND", default=[], action='append',
-                            help='pipe zfs recv input through COMMAND')
-
         parser.add_argument('--resume', action='store_true', help=argparse.SUPPRESS)
         parser.add_argument('--raw', action='store_true', help=argparse.SUPPRESS)
         parser.add_argument('--exclude-received', action='store_true',
                             help=argparse.SUPPRESS)  # probably never needed anymore
 
+        #these things all do stuff by piping zfs send/recv IO
+        parser.add_argument('--send-pipe', metavar="COMMAND", default=[], action='append',
+                            help='pipe zfs send output through COMMAND (can be used multiple times)')
+        parser.add_argument('--recv-pipe', metavar="COMMAND", default=[], action='append',
+                            help='pipe zfs recv input through COMMAND (can be used multiple times)')
+        parser.add_argument('--compress', metavar='TYPE', default=None, choices=compressors.choices(), help='Use compression during transfer, zstd-fast recommended. ({})'.format(", ".join(compressors.choices())))
+        parser.add_argument('--rate', metavar='DATARATE', default=None, help='Limit data transfer rate (e.g. 128K. requires mbuffer.)')
+        parser.add_argument('--buffer', metavar='SIZE', default=None, help='Add zfs send and recv buffers to smooth out IO bursts. (e.g. 128M. requires mbuffer)')
+
+
+
         # note args is the only global variable we use, since its a global readonly setting anyway
         args = parser.parse_args(argv)
 
@@ -141,21 +150,28 @@ class ZfsAutobackup:
             args.rollback = True
 
         self.log = LogConsole(show_debug=self.args.debug, show_verbose=self.args.verbose, color=sys.stdout.isatty())
+        self.verbose(self.HEADER)
 
         if args.resume:
-            self.verbose("NOTE: The --resume option isn't needed anymore (its autodetected now)")
+            self.warning("The --resume option isn't needed anymore (its autodetected now)")
 
         if args.raw:
-            self.verbose(
-                "NOTE: The --raw option isn't needed anymore (its autodetected now). Also see --encrypt and --decrypt.")
+            self.warning(
+                "The --raw option isn't needed anymore (its autodetected now). Also see --encrypt and --decrypt.")
 
         if args.target_path is not None and args.target_path[0] == "/":
             self.log.error("Target should not start with a /")
             sys.exit(255)
 
+        if args.compress and not args.ssh_source and not args.ssh_target:
+            self.warning("Using compression, but transfer is local.")
+
     def verbose(self, txt):
         self.log.verbose(txt)
 
+    def warning(self, txt):
+        self.log.warning(txt)
+
     def error(self, txt):
         self.log.error(txt)
 
@@ -259,6 +275,56 @@ class ZfsAutobackup:
         if self.args.progress:
             self.clear_progress()
 
+    def get_send_pipes(self, logger):
+        """determine the zfs send pipe"""
+
+        ret=[]
+
+        # IO buffer
+        if self.args.buffer:
+            logger("zfs send buffer        : {}".format(self.args.buffer))
+            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m"+self.args.buffer ])
+
+        # custom pipes
+        for send_pipe in self.args.send_pipe:
+            ret.append(ExecuteNode.PIPE)
+            ret.extend(send_pipe.split(" "))
+            logger("zfs send custom pipe   : {}".format(send_pipe))
+
+        # compression
+        if self.args.compress!=None:
+            ret.append(ExecuteNode.PIPE)
+            cmd=compressors.compress_cmd(self.args.compress)
+            ret.extend(cmd)
+            logger("zfs send compression   : {}".format(" ".join(cmd)))
+
+        # transfer rate
+        if self.args.rate:
+            logger("zfs send transfer rate : {}".format(self.args.rate))
+            ret.extend([ ExecuteNode.PIPE, "mbuffer", "-q", "-s128k", "-m16M", "-R"+self.args.rate ])
+
+
+        return ret
+
+    def get_recv_pipes(self, logger):
+
+        ret=[]
+
+        # decompression
+        if self.args.compress!=None:
+            cmd=compressors.decompress_cmd(self.args.compress)
+            ret.extend(cmd)
+            ret.append(ExecuteNode.PIPE)
+            logger("zfs recv decompression : {}".format(" ".join(cmd)))
+
+        # custom pipes
+        for recv_pipe in self.args.recv_pipe:
+            ret.extend(recv_pipe.split(" "))
+            ret.append(ExecuteNode.PIPE)
+            logger("zfs recv custom pipe   : {}".format(recv_pipe))
+
+        return ret
+
     # NOTE: this method also uses self.args. args that need extra processing are passed as function parameters:
     def sync_datasets(self, source_node, source_datasets, target_node):
         """Sync datasets, or thin-only on both sides
@@ -267,6 +333,9 @@ class ZfsAutobackup:
         :type source_node: ZfsNode
         """
 
+        send_pipes=self.get_send_pipes(source_node.verbose)
+        recv_pipes=self.get_recv_pipes(target_node.verbose)
+
         fail_count = 0
         count = 0
         target_datasets = []
@@ -304,8 +373,8 @@ class ZfsAutobackup:
                                               also_other_snapshots=self.args.other_snapshots,
                                               no_send=self.args.no_send,
                                               destroy_incompatible=self.args.destroy_incompatible,
-                                              output_pipes=self.args.send_pipe, input_pipes=self.args.recv_pipe,
-                                              decrypt=self.args.decrypt, encrypt=self.args.encrypt)
+                                              send_pipes=send_pipes, recv_pipes=recv_pipes,
+                                              decrypt=self.args.decrypt, encrypt=self.args.encrypt, )
             except Exception as e:
                 fail_count = fail_count + 1
                 source_dataset.error("FAILED: " + str(e))
@@ -372,10 +441,9 @@ class ZfsAutobackup:
     def run(self):
 
         try:
-            self.verbose(self.HEADER)
 
             if self.args.test:
-                self.verbose("TEST MODE - SIMULATING WITHOUT MAKING ANY CHANGES")
+                self.warning("TEST MODE - SIMULATING WITHOUT MAKING ANY CHANGES")
 
             ################ create source zfsNode
             self.set_title("Source settings")
@@ -402,10 +470,10 @@ class ZfsAutobackup:
             if self.args.ssh_source == self.args.ssh_target:
                 if self.args.target_path:
                     # target and source are the same, make sure to exclude target_path
-                    source_node.verbose("NOTE: Source and target are on the same host, excluding target-path")
+                    self.warning("Source and target are on the same host, excluding target-path from selection.")
                     exclude_paths.append(self.args.target_path)
                 else:
-                    source_node.verbose("NOTE: Source and target are on the same host, excluding received datasets.")
+                    self.warning("Source and target are on the same host, excluding received datasets from selection.")
                     exclude_received=True
 
 
@@ -479,7 +547,7 @@ class ZfsAutobackup:
 
             if self.args.test:
                 self.verbose("")
-                self.verbose("TEST MODE - DID NOT MAKE ANY CHANGES!")
+                self.warning("TEST MODE - DID NOT MAKE ANY CHANGES!")
 
             return fail_count
 

zfs_autobackup/ZfsDataset.py

@@ -503,14 +503,15 @@ class ZfsDataset:
 
         return self.from_names(names[1:])
 
-    def send_pipe(self, features, prev_snapshot, resume_token, show_progress, raw, send_properties, write_embedded, output_pipes):
+    def send_pipe(self, features, prev_snapshot, resume_token, show_progress, raw, send_properties, write_embedded, send_pipes):
         """returns a pipe with zfs send output for this snapshot
 
         resume_token: resume sending from this token. (in that case we don't
         need to know snapshot names)
 
         Args:
-            :type output_pipes: list of str
+            :param send_pipes: output cmd array that will be added to actual zfs send command. (e.g. mbuffer or compression program)
+            :type send_pipes: list of str
             :type features: list of str
             :type prev_snapshot: ZfsDataset
             :type resume_token: str
@@ -556,23 +557,13 @@ class ZfsDataset:
 
             cmd.append(self.name)
 
-        # #add custom output pipes?
-        # if output_pipes:
-        #     #local so do our own piping
-        #     if self.zfs_node.is_local():
-        #         output_pipe = self.zfs_node.run(cmd)
-        #         for pipe_cmd in output_pipes:
-        #             output_pipe=self.zfs_node.run(pipe_cmd, inp=output_pipe, )
-        #         return output_pipe
-        #     #remote, so add with actual | and let remote shell handle it
-        #     else:
-        #         for pipe_cmd in output_pipes:
-        #             cmd.append("|")
-        #             cmd.extend(pipe_cmd)
+        cmd.extend(send_pipes)
 
-        return self.zfs_node.run(cmd, pipe=True, readonly=True)
+        output_pipe = self.zfs_node.run(cmd, pipe=True, readonly=True)
 
-    def recv_pipe(self, pipe, features, filter_properties=None, set_properties=None, ignore_exit_code=False):
+        return output_pipe
+
+    def recv_pipe(self, pipe, features, recv_pipes, filter_properties=None, set_properties=None, ignore_exit_code=False):
         """starts a zfs recv for this snapshot and uses pipe as input
 
         note: you can it both on a snapshot or filesystem object. The
@@ -580,6 +571,7 @@ class ZfsDataset:
         differently.
 
         Args:
+            :param recv_pipes: input cmd array that will be prepended to actual zfs recv command. (e.g. mbuffer or decompression program)
             :type pipe: subprocess.pOpen
             :type features: list of str
             :type filter_properties: list of str
@@ -596,6 +588,8 @@ class ZfsDataset:
         # build target command
         cmd = []
 
+        cmd.extend(recv_pipes)
+
         cmd.extend(["zfs", "recv"])
 
         # don't mount filesystem that is received
@@ -640,15 +634,15 @@ class ZfsDataset:
 
     def transfer_snapshot(self, target_snapshot, features, prev_snapshot, show_progress,
                           filter_properties, set_properties, ignore_recv_exit_code, resume_token,
-                          raw, send_properties, write_embedded, output_pipes, input_pipes):
+                          raw, send_properties, write_embedded, send_pipes, recv_pipes):
         """transfer this snapshot to target_snapshot. specify prev_snapshot for
         incremental transfer
 
         connects a send_pipe() to recv_pipe()
 
         Args:
-            :type output_pipes: list of str
-            :type input_pipes: list of str
+            :type send_pipes: list of str
+            :type recv_pipes: list of str
             :type target_snapshot: ZfsDataset
             :type features: list of str
             :type prev_snapshot: ZfsDataset
@@ -679,9 +673,9 @@ class ZfsDataset:
 
         # do it
         pipe = self.send_pipe(features=features, show_progress=show_progress, prev_snapshot=prev_snapshot,
-                              resume_token=resume_token, raw=raw, send_properties=send_properties, write_embedded=write_embedded, output_pipes=output_pipes)
+                              resume_token=resume_token, raw=raw, send_properties=send_properties, write_embedded=write_embedded, send_pipes=send_pipes)
         target_snapshot.recv_pipe(pipe, features=features, filter_properties=filter_properties,
-                                  set_properties=set_properties, ignore_exit_code=ignore_recv_exit_code)
+                                  set_properties=set_properties, ignore_exit_code=ignore_recv_exit_code, recv_pipes=recv_pipes)
 
     def abort_resume(self):
         """abort current resume state"""
@@ -969,13 +963,13 @@ class ZfsDataset:
 
     def sync_snapshots(self, target_dataset, features, show_progress, filter_properties, set_properties,
                        ignore_recv_exit_code, holds, rollback, decrypt, encrypt, also_other_snapshots,
-                       no_send, destroy_incompatible, output_pipes, input_pipes):
+                       no_send, destroy_incompatible, send_pipes, recv_pipes):
         """sync this dataset's snapshots to target_dataset, while also thinning
         out old snapshots along the way.
 
         Args:
-            :type output_pipes: list of str
-            :type input_pipes: list of str
+            :type send_pipes: list of str
+            :type recv_pipes: list of str
             :type target_dataset: ZfsDataset
             :type features: list of str
             :type show_progress: bool
@@ -1052,7 +1046,7 @@ class ZfsDataset:
                                                   filter_properties=active_filter_properties,
                                                   set_properties=active_set_properties,
                                                   ignore_recv_exit_code=ignore_recv_exit_code,
-                                                  resume_token=resume_token, write_embedded=write_embedded,raw=raw, send_properties=send_properties, output_pipes=output_pipes, input_pipes=input_pipes)
+                                                  resume_token=resume_token, write_embedded=write_embedded, raw=raw, send_properties=send_properties, send_pipes=send_pipes, recv_pipes=recv_pipes)
 
                 resume_token = None
 

zfs_autobackup/ZfsNode.py

@@ -120,7 +120,7 @@ class ZfsNode(ExecuteNode):
                     self._progress_total_bytes = int(progress_fields[2])
                 elif progress_fields[0] == 'incremental':
                     self._progress_total_bytes = int(progress_fields[3])
-                else:
+                elif progress_fields[1].isnumeric():
                     bytes_ = int(progress_fields[1])
                     if self._progress_total_bytes:
                         percentage = min(100, int(bytes_ * 100 / self._progress_total_bytes))
@@ -151,6 +151,9 @@ class ZfsNode(ExecuteNode):
     def error(self, txt):
         self.logger.error("{} {}".format(self.description, txt))
 
+    def warning(self, txt):
+        self.logger.warning("{} {}".format(self.description, txt))
+
     def debug(self, txt):
         self.logger.debug("{} {}".format(self.description, txt))
 

zfs_autobackup/compressors.py

@@ -0,0 +1,69 @@
+# Adopted from Syncoid :)
+
+# this software is licensed for use under the Free Software Foundation's GPL v3.0 license, as retrieved
+# from http://www.gnu.org/licenses/gpl-3.0.html on 2014-11-17.  A copy should also be available in this
+# project's Git repository at https://github.com/jimsalterjrs/sanoid/blob/master/LICENSE.
+
+COMPRESS_CMDS = {
+    'gzip': {
+        'cmd': 'gzip',
+        'args': [ '-3' ],
+        'dcmd': 'zcat',
+        'dargs': [],
+    },
+    'pigz-fast': {
+        'cmd': 'pigz',
+        'args': [ '-3' ],
+        'dcmd': 'pigz',
+        'dargs': [ '-dc' ],
+    },
+    'pigz-slow': {
+        'cmd': 'pigz',
+        'args': [ '-9' ],
+        'dcmd': 'pigz',
+        'dargs': [ '-dc' ],
+    },
+    'zstd-fast': {
+        'cmd': 'zstdmt',
+        'args': [ '-3' ],
+        'dcmd': 'zstdmt',
+        'dargs': [ '-dc' ],
+    },
+    'zstd-slow': {
+        'cmd': 'zstdmt',
+        'args': [ '-19' ],
+        'dcmd': 'zstdmt',
+        'dargs': [ '-dc' ],
+    },
+    'xz': {
+        'cmd': 'xz',
+        'args': [],
+        'dcmd': 'xz',
+        'dargs': [ '-d' ],
+    },
+    'lzo': {
+        'cmd': 'lzop',
+        'args': [],
+        'dcmd': 'lzop',
+        'dargs': [ '-dfc' ],
+    },
+    'lz4': {
+        'cmd': 'lz4',
+        'args': [],
+        'dcmd': 'lz4',
+        'dargs': [ '-dc' ],
+    },
+}
+
+def compress_cmd(compressor):
+    ret=[ COMPRESS_CMDS[compressor]['cmd'] ]
+    ret.extend( COMPRESS_CMDS[compressor]['args'])
+    return ret
+
+def decompress_cmd(compressor):
+    ret= [ COMPRESS_CMDS[compressor]['dcmd'] ]
+    ret.extend(COMPRESS_CMDS[compressor]['dargs'])
+    return ret
+
+def choices():
+    return COMPRESS_CMDS.keys()