static void print_et(m_et* b)
{
fprintf(stdout, "\net struct --------\n");
erl_print_term(stdout, b->e);
fprintf(stdout, "long: %ld\n", b->l);
fprintf(stdout, "\n--------\n");
}
static void print_etseq(m_etseq *b)
{
int i;
for (i = 0; i < b->_length; i++) {
fprintf(stdout, "[%d]:\n", i);
erl_print_term(stdout, b->_buffer[i]);
}
}
int main()
#endif
{
_setmode(0, _O_BINARY);
_setmode(1, _O_BINARY);
erl_init(NULL, 0);
for (;;) {
char buf[4*1024];
ETERM* term;
char* message;
int n;
if (readn(0, buf, 2) <= 0) {
/* fprintf(stderr, "error reading message header\n"); */
/* actually this is where we leave the infinite loop */
exit(1);
}
n = buf[0] * 256 + buf[1];
if (readn(0, buf, n) < 0) {
fprintf(stderr, "error reading message contents\n");
exit(1);
}
term = erl_decode(buf);
if (term == NULL) {
fprintf(stderr, "erl_decode() failed\n");
exit(1);
}
n = erl_print_term(stdout, term);
erl_free_compound(term);
fprintf(stdout,"\r%d\n", n);
fflush(stdout);
}
}
int erl_print_term(FILE *fp, const ETERM *ep)
{
int j,i,doquote;
int ch_written = 0; /* counter of written chars */
if ((!fp) || (!ep)) return 0;
/* ASSERT(ep != NULL); */
j = i = doquote = 0;
switch(ERL_TYPE(ep))
{
case ERL_ATOM: {
char* adata = ERL_ATOM_PTR(ep);
/* FIXME: what if some weird locale is in use? */
if (!islower(adata[0]))
doquote = 1;
for (i = 0; !doquote && i < ERL_ATOM_SIZE(ep); i++)
{
doquote = !(isalnum(adata[i]) || (adata[i] == '_'));
}
if (doquote) {
putc('\'', fp);
ch_written++;
}
fputs(adata, fp);
ch_written += ERL_ATOM_SIZE(ep);
if (doquote) {
putc('\'', fp);
ch_written++;
}
break;
}
case ERL_VARIABLE:
if (!isupper((int)ERL_VAR_NAME(ep)[0])) {
doquote = 1;
putc('\'', fp);
ch_written++;
}
fputs(ERL_VAR_NAME(ep), fp);
ch_written += ERL_VAR_LEN(ep);
if (doquote) {
putc('\'', fp);
ch_written++;
}
break;
case ERL_PID:
ch_written += fprintf(fp, "<%s.%d.%d>",
ERL_PID_NODE(ep),
ERL_PID_NUMBER(ep), ERL_PID_SERIAL(ep));
break;
case ERL_PORT:
ch_written += fprintf(fp, "#Port");
break;
case ERL_REF:
ch_written += fprintf(fp, "#Ref");
break;
case ERL_EMPTY_LIST:
ch_written += fprintf(fp, "[]");
break;
case ERL_LIST:
if (is_printable_list(ep)) {
ch_written += print_string(fp, ep);
} else {
putc('[', fp);
ch_written++;
while (ERL_IS_CONS(ep)) {
ch_written += erl_print_term(fp, HEAD(ep));
ep = TAIL(ep);
if (ERL_IS_CONS(ep)) {
putc(',', fp);
ch_written++;
}
}
if (!ERL_IS_EMPTY_LIST(ep)) {
putc('|', fp);
ch_written++;
ch_written += erl_print_term(fp, ep);
}
putc(']', fp);
ch_written++;
}
break;
case ERL_TUPLE:
putc('{', fp);
ch_written++;
for (i=0; i < ERL_TUPLE_SIZE(ep); i++) {
ch_written += erl_print_term(fp, ERL_TUPLE_ELEMENT(ep, j++) );
if (i != ERL_TUPLE_SIZE(ep)-1) {
putc(',', fp);
ch_written++;
}
}
putc('}', fp);
ch_written++;
break;
case ERL_BINARY: {
int sz = (ERL_BIN_SIZE(ep) > 20) ? 20 : ERL_BIN_SIZE(ep);
unsigned char *ptr = ERL_BIN_PTR(ep);
ch_written += fprintf(fp, "#Bin<");
for (i = 0; i < sz; i++) {
putc(ptr[i], fp); ch_written++;
}
if (sz == 20) ch_written += fprintf(fp, "(%d)....>", ERL_BIN_SIZE(ep)-20);
else ch_written += fprintf(fp, ">");
break;
}
case ERL_INTEGER:
case ERL_SMALL_BIG:
ch_written += fprintf(fp, "%d", ERL_INT_VALUE(ep));
break;
case ERL_U_INTEGER:
case ERL_U_SMALL_BIG:
ch_written += fprintf(fp, "%d", ERL_INT_UVALUE(ep));
break;
case ERL_LONGLONG:
case ERL_U_LONGLONG:
ch_written += fprintf(fp, "%lld", ERL_LL_UVALUE(ep));
break;
case ERL_FLOAT:
ch_written += fprintf(fp, "%f", ERL_FLOAT_VALUE(ep));
break;
case ERL_FUNCTION:
ch_written += fprintf(fp, "#Fun<");
ch_written += erl_print_term(fp, ERL_FUN_MODULE(ep));
putc('.', fp);
ch_written++;
ch_written += erl_print_term(fp, ERL_FUN_INDEX(ep));
putc('.', fp);
ch_written++;
ch_written += erl_print_term(fp, ERL_FUN_UNIQ(ep));
putc('>', fp);
ch_written++;
break;
default:
ch_written = -10000;
erl_err_msg("<ERROR> erl_print_term: Bad type of term !");
}
return ch_written;
}
static void print_term(ETERM *t)
{
fprintf(stdout, "\nETERM --------\n");
erl_print_term(stdout, t);
fprintf(stdout, "\n--------\n");
}
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);
}
void process_init_cmd(ETERM* init_cmd_pattern, int erl_fd, ETERM* msg_frompid)
{
fprintf(stderr, "process_init_cmd got PID "); erl_print_term(stderr, msg_frompid); fprintf(stderr, "\n");
ETERM* response;
ETERM* msg_arg = erl_var_content(init_cmd_pattern, "Arg");
if (!ERL_IS_LIST(msg_arg))
{
erl_err_msg("invalid argument to init command");
response = erl_format("{ecap_node, {error, {badarg, {init, ~w} } } }", msg_arg);
erl_send(erl_fd, msg_frompid, response);
goto invarg_cleanup;
}
char* fn_str = erl_iolist_to_string(msg_arg);
if (fn_str == NULL)
{
erl_err_msg("could not unpack string");
response = erl_format("{ecap_node, {error, {badarg, {init, ~w}}}}", msg_arg);
erl_send(erl_fd, msg_frompid, response);
goto nostr_cleanup;
}
TRACE(("init command got argstring: %s", fn_str));
pthread_t* thread = (pthread_t*)malloc(sizeof(pthread_t));
info_t* threadinfo = (info_t*)malloc(sizeof(info_t));
// We copy all of this data because the transient pointers will be free()d
// just before each function returns, destroying in the thread context.
threadinfo->topid = msg_frompid;
threadinfo->self = thread;
threadinfo->fname = (char*)malloc(strlen(fn_str)+1);
strncpy(threadinfo->fname, fn_str, strlen(fn_str)+1);
threadinfo->erlvm_fd = erl_fd;
int ret;
if ((ret = pthread_create(thread, NULL, watcher, threadinfo)) != 0)
{
TRACE(("failed to create thread, with return code %d", ret));
erl_err_ret("failed to create watcher thread");
response = erl_format("{ecap_node, {error, {threadfail}}}");
erl_send(erl_fd, msg_frompid, response);
TRACE(("freeing thread stuff"));
free(thread);
free(threadinfo->fname);
free(threadinfo);
goto nothread_cleanup;
}
response = erl_format("{ecap_node, ok}");
erl_send(erl_fd, msg_frompid, response);
TRACE(("normal cleanup from init command call"));
nothread_cleanup:
nostr_cleanup:
TRACE(("freeing fn_str"));
erl_free(fn_str);
invarg_cleanup:
TRACE(("freeing terms"));
erl_free_term(response);
erl_free_term(msg_arg);
TRACE(("done with init command processing"));
}
