Add a src file for xcatflowrequest

-Tried bash /dev/udp and read built-in.  This causes single byte read() calls (see zread.c in bash source)
-Tried gawk.  No concept of a timeout and getline never did return the data right...

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@15902 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

src/xcatflowrequest.c

@@ -0,0 +1,48 @@
+/* IBM(c) 2013 EPL licens http://www.eclipse.org/legal/epl-v10.html
+ * Jarrod Johnson - jbjohnso@us.ibm.com
+ * This program periodically transmits a udp packet to designated xCAT server
+ * It waits for an 'ok' and then exits
+ */
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+int main(int argc, char* argv[]) { 
+	int server;
+	struct addrinfo hints;
+	struct addrinfo *results,*cur;
+	struct timeval timeout;
+	int canread=0;
+	char buffer[128];
+	srand(time(NULL));
+	memset(&hints,0,sizeof(struct addrinfo));
+	hints.ai_family = AF_UNSPEC;
+	hints.ai_socktype = SOCK_DGRAM;
+	hints.ai_protocol = IPPROTO_UDP;
+	fd_set selectset;
+	getaddrinfo(argv[1],argv[2],&hints,&results);
+	server = socket(AF_UNSPEC,SOCK_DGRAM,17);
+	for (cur=results; cur != NULL; cur = cur->ai_next) {
+		server = socket(cur->ai_family,cur->ai_socktype,cur->ai_protocol);
+		if (server == -1) continue;
+		if (connect(server,cur->ai_addr,cur->ai_addrlen) != -1) break;
+		close(server);
+	}
+	FD_ZERO(&selectset);
+	FD_SET(server,&selectset);
+	while (1) {
+		timeout.tv_sec = rand() % 120+60;
+		timeout.tv_usec = rand() % 10000;
+		write(server,"resourcerequest: xcatd\n",strlen("resourcerequest: xcatd\n"));
+		canread = select(FD_SETSIZE,&selectset,NULL,NULL,&timeout);
+		if (canread) {
+			read(server,buffer,sizeof(buffer));
+			if (strncmp(buffer,"resourcerequest: ok",strlen("resourcerequest: ok"))==0) {
+				exit(0);
+			}
+		}
+	}
+}