fix possible link problem

1 files changed, 76 insertions, 0 deletions

diff --git a/training/utils/sentclient.cc b/training/utils/sentclient.cc
new file mode 100644
index 00000000..91d994ab
--- /dev/null
+++ b/training/utils/sentclient.cc
@@ -0,0 +1,76 @@
+/* Copyright (c) 2001 by David Chiang. All rights reserved.*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <string.h>
+
+#include "sentserver.h"
+
+int main (int argc, char *argv[]) {
+  int sock, port;
+  char *s, *key;
+  struct hostent *hp;
+  struct sockaddr_in server;
+  int errors = 0;
+
+  if (argc < 3) {
+    fprintf(stderr, "Usage: sentclient host[:port[:key]] command [args ...]\n");
+    exit(1);
+  }
+
+  s = strchr(argv[1], ':');
+  key = NULL;
+
+  if (s == NULL) {
+    port = DEFAULT_PORT;
+  } else {
+    *s = '\0';
+    s+=1;
+	/* dumb hack */
+	key = strchr(s, ':');
+	if (key != NULL){
+		*key = '\0';
+		key += 1;
+	}
+    port = atoi(s);
+  }
+
+  sock = socket(AF_INET, SOCK_STREAM, 0);
+
+  hp = gethostbyname(argv[1]);
+  if (hp == NULL) {
+    fprintf(stderr, "unknown host %s\n", argv[1]);
+    exit(1);
+  }
+
+  bzero((char *)&server, sizeof(server));
+  bcopy(hp->h_addr, (char *)&server.sin_addr, hp->h_length);
+  server.sin_family = hp->h_addrtype;
+  server.sin_port = htons(port);
+
+  while (connect(sock, (struct sockaddr *)&server, sizeof(server)) < 0) {
+    perror("connect()");
+    sleep(1);
+    errors++;
+    if (errors > 5)
+      exit(1);
+  }
+
+  close(0);
+  close(1);
+  dup2(sock, 0);
+  dup2(sock, 1);
+
+  if (key != NULL){
+	write(1, key, strlen(key));
+	write(1, "\n", 1);
+  }
+
+  execvp(argv[2], argv+2);
+  return 0;
+}