systemcalls.cpp

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#include <cstdlib>
#include <iostream>
#include <fstream>
#include <vector>
using namespace std;

#include <commandline.h>
#include <stringserialization.h>
#include <systemcalls.h>
#include <typedefs.h>

stringc systemcalls::output() const
{
  if (filename.empty())
    return "";

  string str;
  
  bool res=filestring::serialize(str,filename);
  if (res==false)
    return "";

  return str;
}

systemcalls::systemcalls
(
  stringc & command_,
  stringc & filename_ 
)
  : command(command_), filename(filename_) 
{
  file_remove=true;
  combine=false;
}

// 
int systemcalls::eval()
{
  lines.clear();

//stacktrace
//cout << SHOW3(command) << endl;

  // Remove the file first before writing to it.
  if (file_remove==true)
  {
    string s0 = "if [ -e " + filename + " ]; then rm " + filename + "; fi";
    system(s0.c_str());
  }

  string s1(command);
  s1 += " > ";
  s1 += filename;
  // <cmd> > tempfile.txt

  if (combine)
    s1 +=  " 2>&1";
  // <cmd> > tempfile.txt 2>&1
  
//cout << SHOW(s1.c_str()) << endl;
  exitstatus = system(s1.c_str());
  flush(cout);
  //cout << endl; // flush the buffer stream.

//stacktrace
//cout << SHOW3(exitstatus) << endl;

  ifstream in(filename.c_str());
  string str;
  while (in)
  {
    getline(in,str);
    if (str.length() > 0)
      lines.push_back(str);
  }

  return exitstatus;
}

systemcallseval::systemcallseval
(
  stringc& command, 
  stringc& options
)
  : systemcalls(command)
{
  commandline cmd(options);
  cmd.mapvar(file_remove,"file_remove");
  cmd.mapvar(combine,"combine");
  
  eval();
}