IBM AIX Continuous Availability Features - IBM Redbooks

if (!strcmp(*(argv+1),"read")){
if (rc=ukeyset_add_key(&ckeyset, ckey, UK_READ)){
perror("main():ukeyset_add_key(ckeyset, ckey,UK_READ)");
exit(1);
}
}else{
if (rc=ukeyset_add_key(&ckeyset, ckey, UK_RW)){
perror("main():ukeyset_add_key(ckeyset, ckey,UK_RW)");
exit(1);
}
}
}
key=ftok("./ukey1.c",5);
pid=fork();
switch(pid){
case (0):/* CHILD */
sleep (1);
if ((id=shmget(key, 0, 0))==-1){
perror("child :shmget()");
return (1);
}
if ( (data=shmat(id,(void *)0, 0)) == (char*) (-1) ){
perror("child :shmat()");
return (1);
}
printf("child:data=0x%x\n",data);
if (rc=ukey_protect(data,one_page,ckey)){
perror("child :ukey_protect(ckey)");
exit(1);
}
oldset=ukeyset_activate(ckeyset,UKA_ADD_KEYS);
if (oldset==UKSET_INVALID){
printf("child :ukeyset_activate() failed");
exit (1);
}
printf("child :READ1 =[%s]\n",data);
strcpy(data+strlen(data),"abcd");
printf("child :WRITE1=[abcd]\n");
sleep(2);
printf("child :READ2 =[%s]\n",data);
strcpy(data+strlen(data),"efgh");
printf("child :WRITE2=[efgh]\n");
sleep(2);
if (shmdt(data)==-1){
perror("child :shmdt()");
return (1);
}
return (0);
case (-1):/* ERROR */
perror("fork()");
return (1);
default:/* PARENT */
one_page=4096;
printf("parent:pagesize=%d\n", one_page);
if ((id=shmget(key, one_page, IPC_CREAT|0644))==-1){
104 IBM AIX Continuous Availability Features