Bitcoin Core  27.99.0
P2P Digital Currency
run_command.cpp
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1 // Copyright (c) 2022 The Bitcoin Core developers
2 // Distributed under the MIT software license, see the accompanying
3 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
4 
5 #include <config/bitcoin-config.h> // IWYU pragma: keep
6 
7 #include <common/run_command.h>
8 
9 #include <tinyformat.h>
10 #include <univalue.h>
11 
12 #ifdef ENABLE_EXTERNAL_SIGNER
13 #include <util/subprocess.h>
14 #endif // ENABLE_EXTERNAL_SIGNER
15 
16 UniValue RunCommandParseJSON(const std::string& str_command, const std::string& str_std_in)
17 {
18 #ifdef ENABLE_EXTERNAL_SIGNER
19  namespace sp = subprocess;
20 
21  UniValue result_json;
22  std::istringstream stdout_stream;
23  std::istringstream stderr_stream;
24 
25  if (str_command.empty()) return UniValue::VNULL;
26 
27  auto c = sp::Popen(str_command, sp::input{sp::PIPE}, sp::output{sp::PIPE}, sp::error{sp::PIPE});
28  if (!str_std_in.empty()) {
29  c.send(str_std_in);
30  }
31  auto [out_res, err_res] = c.communicate();
32  stdout_stream.str(std::string{out_res.buf.begin(), out_res.buf.end()});
33  stderr_stream.str(std::string{err_res.buf.begin(), err_res.buf.end()});
34 
35  std::string result;
36  std::string error;
37  std::getline(stdout_stream, result);
38  std::getline(stderr_stream, error);
39 
40  const int n_error = c.retcode();
41  if (n_error) throw std::runtime_error(strprintf("RunCommandParseJSON error: process(%s) returned %d: %s\n", str_command, n_error, error));
42  if (!result_json.read(result)) throw std::runtime_error("Unable to parse JSON: " + result);
43 
44  return result_json;
45 #else
46  throw std::runtime_error("Compiled without external signing support (required for external signing).");
47 #endif // ENABLE_EXTERNAL_SIGNER
48 }
@ VNULL
Definition: univalue.h:24
bool read(std::string_view raw)
UniValue RunCommandParseJSON(const std::string &str_command, const std::string &str_std_in)
Execute a command which returns JSON, and parse the result.
Definition: run_command.cpp:16
#define strprintf
Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition: tinyformat.h:1161