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//============================================================================
// Name : Client.cpp
// Author : Erik Hellström, hellstrom@isy.liu.se, 2008-12-14
// Modified : Emil Larsson, lime@isy.liu.se, 2012-01-13
//
// Description : The client requests data to be sent by the server.
//
//============================================================================
#include <stdio.h>
#include <string>
#include "ComConduit.h"
//
// Show the command-line usage
//
void Usage(char* argv[]) {
printf("\nUsage: %s <options>\n\n",argv[0]);
printf(" -S=<message> Send message, ex -S=\"hello world\".\n");
printf(" -X Shutdown server.\n");
printf("\n\n");
}
//
// Module main function
//
int main(int argc, char* argv[]) {
// Conduit object
ComConduit Link;
// Key
KeyType key[KEY_LEN] = COM_KEY;
// Work variables
wchar_t data[COMSTR_LEN];
bool doShutdown;
FlagType ret;
int i,j;
char c,*ptr;
WaitResult wr;
// Initialize data
data[0] = '\0';
doShutdown = false;
//
// Parse the command-line.
//
for (i=1; i<argc; i++) {
ptr = argv[i];
while(*ptr == '-') // Step forward
ptr++;
c = *ptr; // Get option
ptr++;
if(*ptr == '=') // Step forward
ptr++;
switch(c) {
case 'S':
case 's':
// Read message
j = 0;
do {
// add 1 to avoid the "null" character
// data[j] = (*ptr)+1;
data[j] = (*ptr);
ptr++;
j++;
} while(j<COMSTR_LEN && *ptr != '\0');
if(j >= COMSTR_LEN) {
fprintf(stderr,"\nToo long message.\n");
return EXIT_FAIL;
}
data[j] = '\0';
break;
case 'X':
case 'x':
// Shutdown
doShutdown = true;
break;
}
}
// Check valid args
if(!doShutdown && data[0] == '\0') {
Usage(argv);
return EXIT_FAIL;
}
//
// Start client
//
if(!Link.StartClient(key)) {
fprintf(stderr,"StartClient() failed.\n");
return EXIT_FAIL;
}
ret = EXIT_OK;
if(doShutdown) {
// Tell server to shutdown
if(!Link.CauseShutdown()) {
fprintf(stderr,"\nCauseShutdown() failed.\n");
ret = EXIT_FAIL;
}
}
else {
do {
// Check if server is ready
wr = Link.WaitForEvent(COM_READY,0);
if(wr != WAIT_OK) {
fprintf(stderr,"Server is not ready.\n");
ret = EXIT_FAIL;
break;
}
// Set data in shm
if(!Link.SetData(data)) {
fprintf(stderr,"SetData() failed.\n");
ret = EXIT_FAIL;
break;
}
// Request that the server send the data
if(!Link.CauseEvent(COM_REQUEST)) {
fprintf(stderr,"CauseEvent() failed.\n");
ret = EXIT_FAIL;
break;
}
} while(false);
}
//
// Shutdown
//
if(!Link.Shutdown()) {
fprintf(stderr,"Shutdown() failed.\n");
ret = EXIT_FAIL;
}
if(ret == EXIT_OK)
fprintf(stdout, "\nClean exit.\n");
return ret;
}
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