static int str_unpack (lua_State *L) {
Header h;
const char *fmt = luaL_checkstring(L, 1);
size_t ld;
const char *data = luaL_checklstring(L, 2, &ld);
size_t pos = (size_t)posrelat(luaL_optinteger(L, 3, 1), ld) - 1;
int n = 0; /* number of results */
luaL_argcheck(L, pos <= ld, 3, "initial position out of string");
initheader(L, &h);
while (*fmt != '\0') {
int size, ntoalign;
KOption opt = getdetails(&h, pos, &fmt, &size, &ntoalign);
luaL_argcheck(L, (size_t)ntoalign + size <= ld - pos, 2,
"data string too short");
pos += ntoalign; /* skip alignment */
/* stack space for item + next position */
luaL_checkstack(L, 2, "too many results");
n++;
switch (opt) {
case Kint:
case Kuint: {
lua_Integer res = unpackint(L, data + pos, h.islittle, size,
(opt == Kint));
lua_pushinteger(L, res);
break;
}
case Kfloat: {
volatile Ftypes u;
lua_Number num;
copywithendian(u.buff, data + pos, size, h.islittle);
if (size == sizeof(u.f)) num = (lua_Number)u.f;
else if (size == sizeof(u.d)) num = (lua_Number)u.d;
else num = u.n;
lua_pushnumber(L, num);
break;
}
case Kchar: {
lua_pushlstring(L, data + pos, size);
break;
}
case Kstring: {
size_t len = (size_t)unpackint(L, data + pos, h.islittle, size, 0);
luaL_argcheck(L, len <= ld - pos - size, 2, "data string too short");
lua_pushlstring(L, data + pos + size, len);
pos += len; /* skip string */
break;
}
case Kzstr: {
size_t len = (int)strlen(data + pos);
luaL_argcheck(L, pos + len < ld, 2,
"unfinished string for format 'z'");
lua_pushlstring(L, data + pos, len);
pos += len + 1; /* skip string plus final '\0' */
break;
}
case Kpaddalign: case Kpadding: case Knop:
n--; /* undo increment */
break;
}
pos += size;
}
lua_pushinteger(L, pos + 1); /* next position */
return n + 1;
}
/****** gdi/request_internal/sge_gdi_packet_unpack() *************************
* NAME
* sge_gdi_packet_unpack() -- unpacks a GDI packet
*
* SYNOPSIS
* bool
* sge_gdi_packet_unpack(sge_gdi_packet_class_t **packet,
* lList **answer_list, sge_pack_buffer *pb)
*
* FUNCTION
* This functions unpacks all data representing a single or multi
* GDI request. The information is parsed from the given packing
* buffer "pb" and ist stored into "packet". Necessary memory will
* be allocated.
*
* INPUTS
* sge_gdi_packet_class_t ** packet - new GDI packet
* lList **answer_list - answer_list
* sge_pack_buffer *pb - packing buffer
*
* RESULT
* bool - error state
* true - success
* false - error
*
* NOTES
* MT-NOTE: sge_gdi_packet_unpack() is MT safe
*
* SEE ALSO
* gdi/request_internal/sge_gdi_packet_get_pb_size()
* gdi/request_internal/sge_gdi_packet_pack_task()
* gdi/request_internal/sge_gdi_packet_pack()
*******************************************************************************/
bool
sge_gdi_packet_unpack(sge_gdi_packet_class_t **packet, lList **answer_list,
sge_pack_buffer *pb)
{
bool aret = true;
bool has_next;
int pack_ret;
DENTER(TOP_LAYER, "sge_gdi_packet_unpack");
*packet = sge_gdi_packet_create_base(answer_list);
if (*packet != NULL) {
bool first = true;
do {
u_long32 target = 0;
u_long32 command = 0;
lList *data_list = NULL;
u_long32 version = 0;
lList *a_list = NULL;
lCondition *condition = NULL;
lEnumeration *enumeration = NULL;
char *auth_info = NULL;
u_long32 task_id = 0;
u_long32 packet_id = 0;
u_long32 has_next_int = 0;
if ((pack_ret = unpackint(pb, &(command)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackint(pb, &(target)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackint(pb, &(version)))) {
goto error_with_mapping;
}
/* JG: TODO (322): At this point we should check the version!
** The existent check function sge_gdi_packet_verify_version
** cannot be called as neccesary data structures are
** available here (e.g. answer list).
** Better do these changes at a more general place
** together with (hopefully coming) further communication
** redesign.
*/
if ((pack_ret = cull_unpack_list(pb, &(data_list)))) {
goto error_with_mapping;
}
if ((pack_ret = cull_unpack_list(pb, &(a_list)))) {
goto error_with_mapping;
}
if ((pack_ret = cull_unpack_cond(pb, &(condition)))) {
goto error_with_mapping;
}
if ((pack_ret = cull_unpack_enum(pb, &(enumeration)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackstr(pb, &(auth_info)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackint(pb, &(task_id)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackint(pb, &(packet_id)))) {
goto error_with_mapping;
}
if ((pack_ret = unpackint(pb, &has_next_int))) {
goto error_with_mapping;
}
has_next = (has_next_int > 0) ? true : false;
if (first) {
(*packet)->id = packet_id;
(*packet)->version = version;
(*packet)->auth_info = auth_info;
auth_info = NULL;
first = false;
} else {
auth_info = (char *) sge_free((char *) auth_info);
}
/* EB: TODO: ST: cleanup - set last parameter to true */
aret = sge_gdi_packet_append_task(*packet, &a_list, target,
command, &data_list, &a_list,
&condition, &enumeration,
false, false);
if (aret == false) {
goto error;
}
} while (has_next);
}
DRETURN(aret);
error_with_mapping:
aret = sge_gdi_map_pack_errors(pack_ret, answer_list);
error:
sge_gdi_packet_free(packet);
DRETURN(aret);
}
/* return
0 reaped a task cleanly
1 no message (asynchronuous mode)
-1 got an error
NOTES
MT-NOTE: rcv_from_execd() is not MT safe
*/
static int rcv_from_execd(sge_gdi_ctx_class_t *ctx, int options, int tag)
{
int ret;
char *msg = NULL;
u_long32 msg_len = 0;
sge_pack_buffer pb;
u_short from_id;
char host[1024];
lListElem *rt_rcv;
u_long32 exit_status=0;
sge_tid_t tid = NULL;
DENTER(TOP_LAYER, "rcv_from_execd");
host[0] = '\0';
from_id = 1;
do {
/* FIX_CONST */
ret = gdi2_receive_message(ctx, (char*)prognames[EXECD], &from_id, host, &tag,
&msg, &msg_len, (options & OPT_SYNCHRON) ? 1:0);
if (ret != CL_RETVAL_OK && ret != CL_RETVAL_SYNC_RECEIVE_TIMEOUT) {
sprintf(lasterror, MSG_GDI_MESSAGERECEIVEFAILED_SI , cl_get_error_text(ret), ret);
DEXIT;
return -1;
}
} while (options&OPT_SYNCHRON && ret == CL_RETVAL_SYNC_RECEIVE_TIMEOUT);
if (ret==CL_RETVAL_SYNC_RECEIVE_TIMEOUT) {
DEXIT;
return 1;
}
ret = init_packbuffer_from_buffer(&pb, msg, msg_len);
if(ret != PACK_SUCCESS) {
sprintf(lasterror, MSG_GDI_ERRORUNPACKINGGDIREQUEST_S, cull_pack_strerror(ret));
DEXIT;
return -1;
}
switch (tag) {
case TAG_TASK_EXIT:
unpackstr(&pb, &tid);
unpackint(&pb, &exit_status);
break;
case TAG_JOB_EXECUTION:
unpackstr(&pb, &tid);
break;
default:
break;
}
clear_packbuffer(&pb);
switch (tag) {
case TAG_TASK_EXIT:
/* change state in exited task */
if (!(rt_rcv = lGetElemStr(remote_task_list, RT_tid,
tid))) {
sprintf(lasterror, MSG_GDI_TASKNOTFOUND_S, tid);
sge_free(&tid);
DEXIT;
return -1;
}
lSetUlong(rt_rcv, RT_status, exit_status);
lSetUlong(rt_rcv, RT_state, RT_STATE_EXITED);
break;
case TAG_JOB_EXECUTION:
/* search task without taskid */
if (!(rt_rcv = lGetElemStr(remote_task_list, RT_tid, "none"))) {
sprintf(lasterror, MSG_GDI_TASKNOTFOUNDNOIDGIVEN_S , tid);
DEXIT;
return -1;
}
lSetString(rt_rcv, RT_tid, tid);
break;
default:
break;
}
sge_free(&tid);
DEXIT;
return 0;
}
