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rpc: Input-from-stdin mode for bitcoin-cli 

Implements #7442 by adding an option `-stdin` which reads
additional arguments from stdin, one per line.

For example

```bash
echo -e "mysecretcode\n120" | src/bitcoin-cli -stdin walletpassphrase
echo -e "walletpassphrase\nmysecretcode\n120" | src/bitcoin-cli -stdin
```
This commit is contained in:
Wladimir J. van der Laan 2016-02-17 15:03:38 +01:00 committed by Jack Grigg
parent 6c9d672f3c
commit 21e33231af
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GPG Key ID: 665DBCD284F7DAFF
1 changed files with 12 additions and 9 deletions
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21
src/bitcoin-cli.cpp
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@ -39,6 +39,7 @@ std::string HelpMessageCli()
strUsage += HelpMessageOpt("-rpcuser=<user>", _("Username for JSON-RPC connections"));
strUsage += HelpMessageOpt("-rpcpassword=<pw>", _("Password for JSON-RPC connections"));
strUsage += HelpMessageOpt("-rpcclienttimeout=<n>", strprintf(_("Timeout in seconds during HTTP requests, or 0 for no timeout. (default: %d)"), DEFAULT_HTTP_CLIENT_TIMEOUT));
strUsage += HelpMessageOpt("-stdin", _("Read extra arguments from standard input, one per line until EOF/Ctrl-D (recommended for sensitive information such as passphrases)"));
return strUsage;
}
@ -258,15 +259,17 @@ int CommandLineRPC(int argc, char *argv[])
argc--;
argv++;
}
// Method
if (argc < 2)
throw runtime_error("too few parameters");
string strMethod = argv[1];
// Parameters default to strings
std::vector<std::string> strParams(&argv[2], &argv[argc]);
UniValue params = RPCConvertValues(strMethod, strParams);
std::vector<std::string> args = std::vector<std::string>(&argv[1], &argv[argc]);
if (GetBoolArg("-stdin", false)) {
// Read one arg per line from stdin and append
std::string line;
while (std::getline(std::cin,line))
args.push_back(line);
}
if (args.size() < 1)
throw runtime_error("too few parameters (need at least command)");
std::string strMethod = args[0];
UniValue params = RPCConvertValues(strMethod, std::vector<std::string>(args.begin()+1, args.end()));
// Execute and handle connection failures with -rpcwait
const bool fWait = GetBoolArg("-rpcwait", false);