erlang_pid *erl_whereis(int fd, const char *name)
{
ETERM *reply;
ETERM *n;
/* FIXME problem for threaded ? */
static erlang_pid pid;
n = erl_format("[~a]",name);
reply = erl_rpc(fd,"erlang","whereis",n);
erl_free_term(n);
if (reply && (ERL_IS_PID(reply))) {
char *node;
node = ERL_PID_NODE(reply);
strcpy(pid.node,node);
pid.num = ERL_PID_NUMBER(reply);
pid.serial = ERL_PID_SERIAL(reply);
pid.creation = ERL_PID_CREATION(reply);
erl_free_term(reply);
return &pid;
}
if (reply) erl_free_term(reply);
return NULL;
}
/*
* Sends an Erlang message to a process at an Erlang node
*/
int erl_send(int fd, ETERM *to ,ETERM *msg)
{
erlang_pid topid;
ei_x_buff x;
int r;
ei_x_new_with_version(&x);
ei_x_encode_term(&x, msg);
/* make the to-pid */
if (!ERL_IS_PID(to)) {
ei_x_free(&x);
erl_errno = EINVAL;
return -1;
}
if (to->uval.pidval.node.latin1) {
strcpy(topid.node, to->uval.pidval.node.latin1);
}
else {
strcpy(topid.node, to->uval.pidval.node.utf8);
}
topid.num = ERL_PID_NUMBER(to);
topid.serial = ERL_PID_SERIAL(to);
topid.creation = ERL_PID_CREATION(to);
r = ei_send(fd, &topid, x.buff, x.index);
ei_x_free(&x);
return r == 0;
}
static int hello_open(const char *path, struct fuse_file_info *fi)
{
int res = 0;
ETERM * response = erl_rpc(FERL_DATA->erlang_fd,"gen_server","call",erl_format("[nefs,{open,~s,~i}]",path,fi->flags));
ETERM * pattern = erl_format("{ok,Fd}");
ETERM * pattern2 = erl_format("{error,access}");
if(erl_match(pattern, response)) {
ETERM * Fd_Pid = erl_var_content(pattern, "Fd");
if(ERL_IS_PID(Fd_Pid)){
fi->fh = Fd_Pid; //store off the file handle pid to be used in subsequent functions
}else{
res= -ENOENT;
}
}else if(erl_match(pattern2, response)){
res = -EACCES;
}else{
res = -ENOENT;
}
return res;
}
int main(void)
#endif
{
ei_x_buff eix;
int index = 0;
ETERM **etermpp = NULL, *etermp = NULL;
char *charp = NULL;
unsigned char uchar, **ucharpp = NULL, *ucharp = NULL;
void *voidp = NULL;
Erl_Heap *erl_heapp = NULL;
int intx = 0;
int *intp = NULL;
unsigned int uintx, *uintp;
unsigned long *ulongp = NULL;
long longx = 0;
double doublex = 0.0;
short shortx = 42;
FILE *filep = NULL;
Erl_IpAddr erl_ipaddr = NULL;
ErlMessage *erlmessagep = NULL;
ErlConnect *erlconnectp = NULL;
struct hostent *hostp = NULL;
struct in_addr *inaddrp = NULL;
/* Converion to erl_interface format is in liberl_interface */
intx = erl_errno;
ei_encode_term(charp, &index, voidp);
ei_x_encode_term(&eix, voidp);
ei_decode_term(charp, &index, voidp);
erl_init(voidp, longx);
erl_connect_init(intx, charp,shortx);
erl_connect_xinit(charp,charp,charp,erl_ipaddr,charp,shortx);
erl_connect(charp);
erl_xconnect(erl_ipaddr,charp);
erl_close_connection(intx);
erl_receive(intx, ucharp, intx);
erl_receive_msg(intx, ucharp, intx, erlmessagep);
erl_xreceive_msg(intx, ucharpp, intp, erlmessagep);
erl_send(intx, etermp, etermp);
erl_reg_send(intx, charp, etermp);
erl_rpc(intx,charp,charp,etermp);
erl_rpc_to(intx,charp,charp,etermp);
erl_rpc_from(intx,intx,erlmessagep);
erl_publish(intx);
erl_accept(intx,erlconnectp);
erl_thiscookie();
erl_thisnodename();
erl_thishostname();
erl_thisalivename();
erl_thiscreation();
erl_unpublish(charp);
erl_err_msg(charp);
erl_err_quit(charp);
erl_err_ret(charp);
erl_err_sys(charp);
erl_cons(etermp,etermp);
erl_copy_term(etermp);
erl_element(intx,etermp);
erl_hd(etermp);
erl_iolist_to_binary(etermp);
erl_iolist_to_string(etermp);
erl_iolist_length(etermp);
erl_length(etermp);
erl_mk_atom(charp);
erl_mk_binary(charp,intx);
erl_mk_empty_list();
erl_mk_estring(charp, intx);
erl_mk_float(doublex);
erl_mk_int(intx);
erl_mk_list(etermpp,intx);
erl_mk_pid(charp,uintx,uintx,uchar);
erl_mk_port(charp,uintx,uchar);
erl_mk_ref(charp,uintx,uchar);
erl_mk_long_ref(charp,uintx,uintx,uintx,uchar);
erl_mk_string(charp);
erl_mk_tuple(etermpp,intx);
erl_mk_uint(uintx);
erl_mk_var(charp);
erl_print_term(filep,etermp);
/* erl_sprint_term(charp,etermp); */
erl_size(etermp);
erl_tl(etermp);
erl_var_content(etermp, charp);
erl_format(charp);
erl_match(etermp, etermp);
erl_global_names(intx, intp);
erl_global_register(intx, charp, etermp);
erl_global_unregister(intx, charp);
erl_global_whereis(intx, charp, charp);
erl_init_malloc(erl_heapp,longx);
erl_alloc_eterm(uchar);
erl_eterm_release();
erl_eterm_statistics(ulongp,ulongp);
erl_free_array(etermpp,intx);
erl_free_term(etermp);
erl_free_compound(etermp);
erl_malloc(longx);
erl_free(voidp);
erl_compare_ext(ucharp, ucharp);
erl_decode(ucharp);
erl_decode_buf(ucharpp);
erl_encode(etermp,ucharp);
erl_encode_buf(etermp,ucharpp);
erl_ext_size(ucharp);
erl_ext_type(ucharp);
erl_peek_ext(ucharp,intx);
erl_term_len(etermp);
erl_gethostbyname(charp);
erl_gethostbyaddr(charp, intx, intx);
erl_gethostbyname_r(charp, hostp, charp, intx, intp);
erl_gethostbyaddr_r(charp, intx, intx, hostp, charp, intx, intp);
erl_init_resolve();
erl_distversion(intx);
erl_epmd_connect(inaddrp);
erl_epmd_port(inaddrp, charp, intp);
charp = ERL_ATOM_PTR(etermp);
intx = ERL_ATOM_SIZE(etermp);
ucharp = ERL_BIN_PTR(etermp);
intx = ERL_BIN_SIZE(etermp);
etermp = ERL_CONS_HEAD(etermp);
etermp = ERL_CONS_TAIL(etermp);
intx = ERL_COUNT(etermp);
doublex= ERL_FLOAT_VALUE(etermp);
uintx = ERL_INT_UVALUE(etermp);
intx = ERL_INT_VALUE(etermp);
intx = ERL_IS_ATOM(etermp);
intx = ERL_IS_BINARY(etermp);
intx = ERL_IS_CONS(etermp);
intx = ERL_IS_EMPTY_LIST(etermp);
intx = ERL_IS_FLOAT(etermp);
intx = ERL_IS_INTEGER(etermp);
intx = ERL_IS_LIST(etermp);
intx = ERL_IS_PID(etermp);
intx = ERL_IS_PORT(etermp);
intx = ERL_IS_REF(etermp);
intx = ERL_IS_TUPLE(etermp);
intx = ERL_IS_UNSIGNED_INTEGER(etermp);
uchar = ERL_PID_CREATION(etermp);
charp = ERL_PID_NODE(etermp);
uintx = ERL_PID_NUMBER(etermp);
uintx = ERL_PID_SERIAL(etermp);
uchar = ERL_PORT_CREATION(etermp);
charp = ERL_PORT_NODE(etermp);
uintx = ERL_PORT_NUMBER(etermp);
uchar = ERL_REF_CREATION(etermp);
intx = ERL_REF_LEN(etermp);
charp = ERL_REF_NODE(etermp);
uintx = ERL_REF_NUMBER(etermp);
uintp = ERL_REF_NUMBERS(etermp);
etermp = ERL_TUPLE_ELEMENT(etermp,intx);
intx = ERL_TUPLE_SIZE(etermp);
return
BUFSIZ +
EAGAIN +
EHOSTUNREACH +
EINVAL +
EIO +
EMSGSIZE +
ENOMEM +
ERL_ATOM +
ERL_BINARY +
ERL_ERROR +
ERL_EXIT +
ERL_FLOAT +
ERL_INTEGER +
ERL_LINK +
ERL_LIST +
ERL_MSG +
ERL_NO_TIMEOUT +
ERL_PID +
ERL_PORT +
ERL_REF +
ERL_REG_SEND +
ERL_SEND +
ERL_SMALL_BIG +
ERL_TICK +
ERL_TIMEOUT +
ERL_TUPLE +
ERL_UNLINK +
ERL_U_INTEGER +
ERL_U_SMALL_BIG +
ERL_VARIABLE +
ETIMEDOUT +
MAXNODELEN +
MAXREGLEN;
}
void watcher(void* data)
{
TRACE(("watcher thread started!"));
info_t* threadinfo = (info_t*)data;
int triggerfd, cnt, ret;
char attrdata[1024];
struct pollfd ufd;
if (!ERL_IS_PID(threadinfo->topid))
{
fprintf(stderr, "PID is not a pid. wat.");
pthread_exit(NULL);
}
TRACE(("watcher thread got fname(%d): %s", strlen(threadinfo->fname), threadinfo->fname));
//TRACE(("watcher got PID <.%d.%d> and fd %d",
// ERL_PID_NUMBER(&threadinfo->topid),
// ERL_PID_SERIAL(&threadinfo->topid),
// threadinfo->erlvm_fd));
fprintf(stderr, "watcher got PID "); erl_print_term(stderr, threadinfo->topid); fprintf(stderr, "\n");
if ((ufd.fd = open(threadinfo->fname, O_RDONLY)) < 0)
{
TRACE(("unable to open file %s", threadinfo->fname));
perror("unable to open file");
goto end_watcher;
}
ufd.events = POLLPRI | POLLERR;
// dummy read
cnt = read(ufd.fd, attrdata, 1023);
TRACE(("dummy read got value %d", cnt));
TRACE(("starting up main watcher loop"));
while ((ret = poll(&ufd, 1, 10000)) >= 0)
{
TRACE(("began watcher loop"));
if (ret == 0)
{
TRACE(("watcher thread poll() timed out, continuing."));
continue;
}
if (ufd.revents & (POLLPRI|POLLERR))
{
TRACE(("watcher caught an event!"));
close(ufd.fd);
if ((ufd.fd = open(threadinfo->fname, O_RDONLY)) < 0)
{
TRACE(("unable to re-open file %s", threadinfo->fname));
perror("unable to re-open file");
break;
}
cnt = read(ufd.fd, attrdata, 1023);
attrdata[cnt] = '\0';
TRACE(("watcher got %d bytes: %s", cnt, attrdata));
ETERM* notification = erl_format("{data, ~s}", attrdata);
int sendret = erl_send(threadinfo->erlvm_fd, threadinfo->topid, notification);
if (!sendret)
{
switch(erl_errno)
{
case(EINVAL):
fprintf(stderr, "unable to send notification: bad PID\n");
break;
case(ENOMEM):
fprintf(stderr, "unable to send notification: no memory\n");
break;
case(EIO):
fprintf(stderr, "unable to send notification: I/O error\n");
break;
default:
fprintf(stderr, "unable to send notification: unspecified error\n");
break;
}
}
else
{
TRACE(("sent notification"));
}
free(notification);
}
else
{
printf("watcher got something weird! revents = %d\n", ufd.revents);
}
ufd.revents = 0;
TRACE(("finishing watcher loop"));
}
end_watcher:
erl_free_compound(threadinfo->topid);
free(threadinfo->fname);
pthread_t* dying = threadinfo->self;
free(threadinfo);
free(dying);
TRACE(("watcher thread exiting"));
pthread_exit(NULL);
}
