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/*
* The Unix Channel
*
* by Michel Beaudouin-Lafon
*
* Copyright 1990-1993
* Laboratoire de Recherche en Informatique (LRI)
*
* Send a request to a server
*
* $Id$
* $CurLog$
*/
/* Usage:
* tellagent agentname request
* tellagent agentname -f file
* tellagent agentname
*/
#include "TextStream.h"
#include "Multiplexer.h"
#include "error.h"
#include <sys/file.h>
#include <string.h>
#include <stdlib.h>
#include <sys/wait.h>
class INPUT;
class TELLER;
class INPUT : public UchChannel {
protected:
TELLER* tell;
UchMsgBuffer input;
public:
INPUT (TELLER* t, int fd) : UchChannel (fd) { tell = t; }
void HandleRead ();
};
class TELLER : public UchTextService {
protected:
pUchChannel in;
pUchChannel out;
cmd_res Execute (const UchTextLine&);
void AbandonRestart ();
public:
TELLER () : UchTextService () { in = 0; out = 0; }
void SetOutput (int);
void SetInput (int fd);
void Close ();
};
//---------------- INPUT
void
INPUT :: HandleRead ()
{
input.NeedSize (128);
int n = Read (input);
if (n < 0)
SysError (ErrFatal, "read input");
if (n == 0) {
if (input.BufLength ()) {
input.Append ('\n');
input.Append ('\0');
tell->Send ((const char*) input.Buffer ());
input.Flush ();
}
tell->Close ();
return;
}
input.Append ('\0');
tell->Send ((const char*) input.Buffer ());
input.Flush ();
}
void
TELLER :: SetOutput (int fd)
{
out = new UchChannel (fd);
}
void
TELLER :: SetInput (int fd)
{
in = new INPUT (this, fd);
in->SetMode (IORead);
if (Mpx)
Mpx->Add (*in);
}
UchTextService::cmd_res
TELLER :: Execute (const UchTextLine& l)
{
if (! out)
return isCmdOk;
UchMsgBuffer buf;
l.Unparse (&buf);
buf.Append ('\n');
out->WriteBuffer (buf);
return isCmdOk;
}
void
TELLER :: AbandonRestart ()
{
if (in) {
Mpx->Remove (*in);
in = 0;
}
out = 0;
UchTextService::AbandonRestart ();
}
void
TELLER :: Close ()
{
if (in) {
Mpx->Remove (*in);
in = 0;
}
out = 0;
UchTextService::Close ();
}
//---------------- Usage
void
Usage ()
{
Error (ErrUsage, NULL, "server[@host] [request | -f file]");
}
//---------------- main
main (int argc, char** argv)
{
ProgramName (argv [0]);
// LogfileName ("tellagent.log");
if (argc < 2)
Usage ();
const char* sname = argv [1];
const char* host = 0;
char* p = strchr (sname, '@');
if (p) {
*p++ = '\0';
host = p;
}
UchMultiplexer mpx;
TELLER* tell = new TELLER;
tell->Init (mpx, sname, host);
int fdin = 0; /*stdin*/
if (argc == 2) {
// tellagent server : start interactive session
} else if (strcmp (argv [2], "-f") == 0) {
// tellagent server -f file: read from file
if (argc != 4)
Usage ();
const char* fname = argv [3];
fdin = open (fname, O_RDONLY);
if (fdin < 0)
SysError (ErrFatal, fname);
} else {
// tellagent server request: send request and close
UchTextLine line;
for (int i = 2; i < argc; i++)
line << argv [i];
tell->SetOutput (1 /*stdout*/);
tell->Send (line);
tell->Close ();
while (tell->GetStatus () != UchTextService::isRunning) {
mpx.LoopScan ();
wait (0);
}
exit (1);
}
if (fdin >= 0)
tell->SetInput (fdin);
tell->SetOutput (1 /*stdout*/);
#if 0
if (MpxRun () == isMpxEmpty)
exit (0);
#else
mpx.LoopScan ();
#endif
exit (1);
}
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