Implementing the redirection


 
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Old 11-30-2006
Implementing the redirection

Hi all
I am facing a problem with redirection. Its somewhat related to parsing.
I am following the following steps.
1. take the command and tokenize it.
2. if redirection is there then give it to redirection unit
3. if pipe is there give it to piping unit.
4. do until the command ends


Could you please tell me are these steps right as I am a new guy. Please tell me how Shell do the parsing of a command.
I am doing in C language.
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pstream.h(3)						     Library Functions Manual						      pstream.h(3)

NAME
pstream.h - Declares all PStreams classes. SYNOPSIS
#include <ios> #include <streambuf> #include <istream> #include <ostream> #include <string> #include <vector> #include <algorithm> #include <cerrno> #include <cstddef> #include <cstdlib> #include <sys/types.h> #include <sys/wait.h> #include <sys/ioctl.h> #include <unistd.h> #include <signal.h> #include <fcntl.h> Classes struct redi::pstreams Common base class providing constants and typenames. class redi::basic_pstreambuf< CharT, Traits > Class template for stream buffer. class redi::pstream_common< CharT, Traits > Class template for common base class. class redi::basic_ipstream< CharT, Traits > Class template for Input PStreams. class redi::basic_opstream< CharT, Traits > Class template for Output PStreams. class redi::basic_pstream< CharT, Traits > Class template for Bidirectional PStreams. class redi::basic_rpstream< CharT, Traits > template for Restricted PStreams. Namespaces namespace redi All PStreams classes are declared in namespace redi. Defines #define PSTREAMS_VERSION 0x0070 The library version. Typedefs typedef basic_pstreambuf< char > redi::pstreambuf Type definition for common template specialisation. typedef basic_ipstream< char > redi::ipstream Type definition for common template specialisation. typedef basic_opstream< char > redi::opstream Type definition for common template specialisation. typedef basic_pstream< char > redi::pstream Type definition for common template specialisation. typedef basic_rpstream< char > redi::rpstream Type definition for common template specialisation. Detailed Description Declares all PStreams classes. Author: Jonathan Wakely Defines classes redi::ipstream, redi::opstream, redi::pstream and redi::rpstream. Author Generated automatically by Doxygen for PStreams from the source code. PStreams Thu Nov 10 2011 pstream.h(3)