Merge #12220: Error if relative -walletdir is specified

ec527c6 Don't allow relative -walletdir paths (Russell Yanofsky)

Pull request description:

  This makes it an error to explicitly specify a non-absolute -walletdir path, and also adds a debug.log warning if a relative rather than absolute -datadir path is configured.

  Specifying paths relative to the current working directory in a daemon process can be dangerous, because files can fail to be located even if the configuration doesn't change, but the daemon is started up differently.

  Specifying a relative -datadir now adds a warning to the debug log. It would not be backwards-compatible to forbid relative -datadir paths entirely, and it could also be inconvenient for command line testing.

  Specifying a relative -walletdir now results in a startup error. But since the -walletdir option is new in 0.16.0, there should be no compatibility issues. Another reason not to use working directory paths for -walletdir specifically is that the default -walletdir is a "wallets" subdirectory inside the datadir, so it could be surprising that setting -walletdir manually would choose a directory rooted in a completely different location.

Tree-SHA512: 67cbdae677f82487a9031c5ec96b0205a488ab08718a0f4f49365e025119f3d7f6cfc88ba1eba04c1ecd8b9561a5b2c42e2e1a267af7c08c76b83e5e361f5a31

test/functional/multiwallet.py

@@ -30,6 +30,10 @@ class MultiWalletTest(BitcoinTestFramework):
 
         self.stop_nodes()
 
+        self.assert_start_raises_init_error(0, ['-walletdir=wallets'], 'Error: Specified -walletdir "wallets" does not exist')
+        self.assert_start_raises_init_error(0, ['-walletdir=wallets'], 'Error: Specified -walletdir "wallets" is a relative path', cwd=data_dir())
+        self.assert_start_raises_init_error(0, ['-walletdir=debug.log'], 'Error: Specified -walletdir "debug.log" is not a directory', cwd=data_dir())
+
         # should not initialize if there are duplicate wallets
         self.assert_start_raises_init_error(0, ['-wallet=w1', '-wallet=w1'], 'Error loading wallet w1. Duplicate -wallet filename specified.')
 

test/functional/test_framework/test_framework.py

@@ -220,18 +220,18 @@ class BitcoinTestFramework():
         for i in range(num_nodes):
             self.nodes.append(TestNode(i, self.options.tmpdir, extra_args[i], rpchost, timewait=timewait, binary=binary[i], stderr=None, mocktime=self.mocktime, coverage_dir=self.options.coveragedir, use_cli=self.options.usecli))
 
-    def start_node(self, i, extra_args=None, stderr=None):
+    def start_node(self, i, *args, **kwargs):
         """Start a bitcoind"""
 
         node = self.nodes[i]
 
-        node.start(extra_args, stderr)
+        node.start(*args, **kwargs)
         node.wait_for_rpc_connection()
 
         if self.options.coveragedir is not None:
             coverage.write_all_rpc_commands(self.options.coveragedir, node.rpc)
 
-    def start_nodes(self, extra_args=None):
+    def start_nodes(self, extra_args=None, *args, **kwargs):
         """Start multiple bitcoinds"""
 
         if extra_args is None:
@@ -239,7 +239,7 @@ class BitcoinTestFramework():
         assert_equal(len(extra_args), self.num_nodes)
         try:
             for i, node in enumerate(self.nodes):
-                node.start(extra_args[i])
+                node.start(extra_args[i], *args, **kwargs)
             for node in self.nodes:
                 node.wait_for_rpc_connection()
         except:
@@ -271,10 +271,10 @@ class BitcoinTestFramework():
         self.stop_node(i)
         self.start_node(i, extra_args)
 
-    def assert_start_raises_init_error(self, i, extra_args=None, expected_msg=None):
+    def assert_start_raises_init_error(self, i, extra_args=None, expected_msg=None, *args, **kwargs):
         with tempfile.SpooledTemporaryFile(max_size=2**16) as log_stderr:
             try:
-                self.start_node(i, extra_args, stderr=log_stderr)
+                self.start_node(i, extra_args, stderr=log_stderr, *args, **kwargs)
                 self.stop_node(i)
             except Exception as e:
                 assert 'bitcoind exited' in str(e)  # node must have shutdown

test/functional/test_framework/test_node.py

@@ -81,13 +81,13 @@ class TestNode():
             assert self.rpc_connected and self.rpc is not None, "Error: no RPC connection"
             return getattr(self.rpc, name)
 
-    def start(self, extra_args=None, stderr=None):
+    def start(self, extra_args=None, stderr=None, *args, **kwargs):
         """Start the node."""
         if extra_args is None:
             extra_args = self.extra_args
         if stderr is None:
             stderr = self.stderr
-        self.process = subprocess.Popen(self.args + extra_args, stderr=stderr)
+        self.process = subprocess.Popen(self.args + extra_args, stderr=stderr, *args, **kwargs)
         self.running = True
         self.log.debug("bitcoind started, waiting for RPC to come up")