run_command.cpp raw

   1  // Copyright (c) 2022-present 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 <bitcoin-build-config.h> // IWYU pragma: keep
   6  
   7  #include <common/run_command.h>
   8  
   9  #include <tinyformat.h>
  10  #include <univalue.h>
  11  #include <util/string.h>
  12  
  13  #ifdef ENABLE_EXTERNAL_SIGNER
  14  #include <util/subprocess.h>
  15  #endif // ENABLE_EXTERNAL_SIGNER
  16  
  17  UniValue RunCommandParseJSON(const std::vector<std::string>& cmd_args, const std::string& str_std_in)
  18  {
  19  #ifdef ENABLE_EXTERNAL_SIGNER
  20      namespace sp = subprocess;
  21  
  22      UniValue result_json;
  23      std::istringstream stdout_stream;
  24      std::istringstream stderr_stream;
  25  
  26      if (cmd_args.empty()) return UniValue::VNULL;
  27  
  28      auto c = sp::Popen(cmd_args, sp::input{sp::PIPE}, sp::output{sp::PIPE}, sp::error{sp::PIPE});
  29      if (!str_std_in.empty()) {
  30          c.send(str_std_in);
  31      }
  32      auto [out_res, err_res] = c.communicate();
  33      stdout_stream.str(std::string{out_res.buf.begin(), out_res.buf.end()});
  34      stderr_stream.str(std::string{err_res.buf.begin(), err_res.buf.end()});
  35  
  36      std::string result;
  37      std::string error;
  38      std::getline(stdout_stream, result);
  39      std::getline(stderr_stream, error);
  40  
  41      const int n_error = c.retcode();
  42      if (n_error) throw std::runtime_error(strprintf("RunCommandParseJSON error: process(%s) returned %d: %s\n", util::Join(cmd_args, " "), n_error, error));
  43      if (!result_json.read(result)) throw std::runtime_error("Unable to parse JSON: " + result);
  44  
  45      return result_json;
  46  #else
  47      throw std::runtime_error("Compiled without external signing support (required for external signing).");
  48  #endif // ENABLE_EXTERNAL_SIGNER
  49  }
  50