RE: [boost] Re: process control, fork/pipe, etc.

From: Jeff Garland (jeff_at_[hidden])
Date: 2002-07-26 16:31:14

How about this:

  //usage:
  systemistream s("./hello.exe"); //execute hello.cpp put results stream
  std::string data;
  while (getline(s,data)) {
    std::cout << data << std::endl;
  }

//! An input stream built from the result of running a shell command
/*! This class is intended to facilitate large scale integration by similar
 *  to the perl "open" command by combining the concept of an input stream
 *  and the common idea of a spawning a subprocess to perform a task.
 *
 *  The class takes the definition optionally tasks the the subprocess 
 *  execution string as the a construction argument and will automatically 
 *  spawn the child process.  Alternatively, the child process can be created
 *  later using the open method.
 */
class systemistream :  public std::basic_istream<char, std::char_traits<char> > {
public:
  systemistream(const std::string& command="");
  ~systemistream();
  void open(const std::string& command);
  void close();
private:
  std::basic_filebuf<char, std::char_traits<char> >* buf_;

};

It's a bit of a hack, but it works...

Jeff