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Don't allow relative -walletdir paths

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Also warn if bitcoind is configured to use a relative -datadir path.

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 also 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.
This commit is contained in:
Russell Yanofsky
2018-01-18 13:15:00 -05:00
parent e839d6570d
commit ec527c6c88
7 changed files with 32 additions and 16 deletions
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9
src/init.cpp
View File

@@ -1210,6 +1210,15 @@ bool AppInitMain(boost::thread_group& threadGroup, CScheduler& scheduler)
LogPrintf("Using config file %s\n", GetConfigFile(gArgs.GetArg("-conf", BITCOIN_CONF_FILENAME)).string());
LogPrintf("Using at most %i automatic connections (%i file descriptors available)\n", nMaxConnections, nFD);
// Warn about relative -datadir path.
if (gArgs.IsArgSet("-datadir") && !fs::path(gArgs.GetArg("-datadir", "")).is_absolute()) {
LogPrintf("Warning: relative datadir option '%s' specified, which will be interpreted relative to the "
"current working directory '%s'. This is fragile, because if bitcoin is started in the future "
"from a different location, it will be unable to locate the current data files. There could "
"also be data loss if bitcoin is started while in a temporary directory.\n",
gArgs.GetArg("-datadir", ""), fs::current_path().string());
}
InitSignatureCache();
InitScriptExecutionCache();

12
src/wallet/init.cpp
View File

@@ -205,11 +205,15 @@ bool VerifyWallets()
return true;
}
if (gArgs.IsArgSet("-walletdir") && !fs::is_directory(GetWalletDir())) {
if (fs::exists(fs::system_complete(gArgs.GetArg("-walletdir", "")))) {
return InitError(strprintf(_("Specified -walletdir \"%s\" is not a directory"), gArgs.GetArg("-walletdir", "").c_str()));
if (gArgs.IsArgSet("-walletdir")) {
fs::path wallet_dir = gArgs.GetArg("-walletdir", "");
if (!fs::exists(wallet_dir)) {
return InitError(strprintf(_("Specified -walletdir \"%s\" does not exist"), wallet_dir.string()));
} else if (!fs::is_directory(wallet_dir)) {
return InitError(strprintf(_("Specified -walletdir \"%s\" is not a directory"), wallet_dir.string()));
} else if (!wallet_dir.is_absolute()) {
return InitError(strprintf(_("Specified -walletdir \"%s\" is a relative path"), wallet_dir.string()));
}
return InitError(strprintf(_("Specified -walletdir \"%s\" does not exist"), gArgs.GetArg("-walletdir", "").c_str()));
}
LogPrintf("Using wallet directory %s\n", GetWalletDir().string());

2
src/wallet/walletutil.cpp
View File

@@ -9,7 +9,7 @@ fs::path GetWalletDir()
fs::path path;
if (gArgs.IsArgSet("-walletdir")) {
path = fs::system_complete(gArgs.GetArg("-walletdir", ""));
path = gArgs.GetArg("-walletdir", "");
if (!fs::is_directory(path)) {
// If the path specified doesn't exist, we return the deliberately
// invalid empty string.