Popen.cc

Go to the documentation of this file.

#include "casm/system/Popen.hh"
 
#include <stdexcept>
 
namespace CASM {
 
Popen::Popen(std::function<void(FILE *)> _popen_handler,
             std::function<void(int)> _pclose_handler,
             bool _combine_stdout_stderr)
    : m_popen_handler(_popen_handler),
      m_pclose_handler(_pclose_handler),
      m_combine_stdout_stderr(_combine_stdout_stderr) {}
 
void Popen::popen(std::string _command) {
  m_command = _command;
 
  if (m_combine_stdout_stderr) {
    m_command += " 2>&1";
  }
 
  FILE *fp;
  char path[PATH_MAX];
 
  fp = ::popen(m_command.c_str(), "r");
  m_popen_handler(fp);
 
  m_stdout = "";
  while (fgets(path, PATH_MAX, fp) != nullptr) {
    m_stdout += path;
  }
 
  m_pclose_result = pclose(fp);
 
  m_pclose_handler(m_pclose_result);
}
 
std::string Popen::gets() const { return m_stdout; }
 
void Popen::print(std::ostream &sout) const {
  sout << m_command << "\n";
  sout << m_stdout;
}
 
int Popen::exit_code() const { return m_pclose_result / 256; }
 
void Popen::default_popen_handler(FILE *fp) {
  if (fp == nullptr) {
    throw std::runtime_error("Error: popen failed.");
  }
}
 
void Popen::default_pclose_handler(int status) {
  if (status == -1) {
    throw std::runtime_error("Error: pclose failed.");
  }
}
 
}  // namespace CASM