source: trunk/vizservers/nanoscale/client.c @ 952

Last change on this file since 952 was 409, checked in by kennell, 17 years ago

Added nanoscale for visualization server load distribution.

File size: 2.5 KB
Line 
1#include <stdio.h>
2#include <unistd.h>
3#include <stdlib.h>
4#include <string.h>
5#include <signal.h>
6#include <sys/types.h>
7#include <sys/socket.h>
8#include <sys/wait.h>
9#include <sys/select.h>
10#include <sys/time.h>
11#include <netinet/in.h>
12#include <getopt.h>
13
14#include "clientlib.h"
15
16/*
17 * min()/max() macros that also do
18 * strict type-checking.. See the
19 * "unnecessary" pointer comparison.
20 */
21#define min(x,y) ({ \
22        typeof(x) _x = (x);     \
23        typeof(y) _y = (y);     \
24        (void) (&_x == &_y);            \
25        _x < _y ? _x : _y; })
26
27#define max(x,y) ({ \
28        typeof(x) _x = (x);     \
29        typeof(y) _y = (y);     \
30        (void) (&_x == &_y);            \
31        _x > _y ? _x : _y; })
32
33void help(const char *argv0)
34{
35  fprintf(stderr,
36          "Syntax: %s addr:port load\n",
37          argv0);
38  exit(1);
39}
40
41int connect_fd = -1;
42
43void activity(int signum)
44{
45  write(connect_fd, "hello\n\r", 7);
46  write(1,".",1);
47}
48
49
50int main(int argc, char *argv[])
51{
52  int val;
53  int status;
54  struct sockaddr_in connect_addr;
55  int connect_port = -1;
56
57  if (argc != 3) {
58    help(argv[0]);
59  }
60
61  char addr[100];
62  if (sscanf(argv[1], "%100[^:\n]:%d\n", addr, &connect_port) != 2) {
63    help(argv[0]);
64  }
65  int memory = strtoul(argv[2],0,0);
66
67  connect_fd = connect_renderer(addr, connect_port, memory);
68
69  if (connect_fd == -1) {
70    return 1;
71  }
72
73  printf("Connection accepted.\n");
74
75#ifdef DEBUGGING
76  if (signal(SIGALRM, activity) == SIG_ERR) {
77    perror("signal");
78  }
79
80  struct itimerval itvalue = {
81    {0,500000}, {0,500000}
82  };
83  status = setitimer(ITIMER_REAL, &itvalue, NULL);
84#endif
85
86  fd_set rfds;
87  FD_ZERO(&rfds);
88  while(1) {
89    char buffer[100];
90    FD_SET(0,&rfds);
91    FD_SET(connect_fd,&rfds);
92    status = select(connect_fd+1, &rfds, NULL, NULL, NULL);
93    if (FD_ISSET(0,&rfds)) {
94      status = read(0,buffer,sizeof(buffer));
95      if (status <= 0) {
96        fprintf(stderr,"Goodbye\n");
97        exit(0);
98      } else {
99        status = write(connect_fd, buffer, status);
100        if (status < 0) {
101          perror("write");
102        }
103      }
104    }
105
106    else if (FD_ISSET(connect_fd,&rfds)) {
107      status = read(connect_fd,buffer,sizeof(buffer));
108      if (status <= 0) {
109        fprintf(stderr,"Server closed connection\n");
110        exit(0);
111      } else {
112        status = write(1, buffer, status);
113        if (status < 0) {
114          perror("write");
115        }
116      }
117    }
118
119    else {
120      fprintf(stderr,"Strange case for select: %d\n", status);
121      exit(1);
122    }
123  }
124
125  return 0;
126}
127
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