int TB_handle_one(int cid)
{
term *trm, *result;
TBbool sndvoid = TBfalse;
assert_valid_cid(cid);
trm = TB_receive(cid);
if(!trm) {
err_fatal("contact with ToolBus lost.\n");
}
if(streq(get_txt(fun_sym(trm)), "rec-do")) {
sndvoid = TBtrue;
}
result = connections[cid]->handler(cid, trm);
if(result) {
return TB_send(cid, result);
}
else if(sndvoid) {
return TB_send(cid, TBmake("snd-void()"));
}
err_fatal("Unhandled case in TB_handle_one!\n");
return -1;
}
int TB_connect(int cid)
{
int r, dummy;
term *trm, *in_sign, *out_sign;
assert_valid_cid(cid);
WellKnownSocketPort = connections[cid]->port;
r = mkports(TBfalse, connections[cid]->tool_name, connections[cid]->host,
&connections[cid]->tid, &connections[cid]->socket, &dummy);
if(r == TB_ERROR) {
if(connections[cid]->verbose)
TBmsg("TB_connect: failed to connect to ToolBus port %d\n",
connections[cid]->port);
return -1;
}
if(connections[cid]->verbose)
TBmsg("TB_connect: connected to ToolBus port %d, tid = %d\n",
connections[cid]->port, connections[cid]->tid);
trm = TBread(connections[cid]->socket); /* obtain the tool signature from the ToolBus */
if(TBmatch(trm, "rec-do(signature(%t,%t))", &in_sign, &out_sign)){
TBwrite(connections[cid]->socket, TBmake("snd-void()"));
if(connections[cid]->sigchecker){
trm = (*connections[cid]->sigchecker)(cid, in_sign);
if(trm)
err_warn("TBconnect -- NOT IN INPUT SIGNATURE: %t", trm);
}
} else
err_fatal("signature information garbled: %t", trm);
return 0;
}
int TBinit(char *tname, int argc, char *argv[],
TBcallbackTerm fun, term * (check_in_sign)(term *))
{
char *s;
char host_toolbus[MAXHOSTNAMELEN];
int fromToolBus, i = 1;
TBbool local_ports = TBfalse;
term *trm;
tool_name = (tname) ? tname : "anonymous_tool";
ToolBus = TBfalse;
init_terms();
init_utils();
if(gethostname(this_host, MAXHOSTNAMELEN) < 0)
err_sys_fatal("TBinit -- can't get host name");
strcpy(host_toolbus, this_host);
WellKnownSocketPort = TB_PORT;
while(i < argc){
if(streq(argv[i], "-help")){
help(); exit(0);
} else if(streq(argv[i], "-verbose")){
TBverbose = TBtrue;
} else if(streq(argv[i], "-TB_HOST")){
i++;
if(strlen(argv[i]) > MAXHOSTNAMELEN)
err_fatal("TBinit -- name of ToolBus host too long");
strcpy(host_toolbus, argv[i]);
i++;
} else if(streq(argv[i],"-TB_PORT")){
i++;
WellKnownSocketPort = atoi(argv[i++]);
} else if(streq(argv[i],"-TB_TOOL_ID")){
i++;
this_tool_id = atoi(argv[i++]);
} else if(streq(argv[i], "-TB_TOOL_NAME")){
tool_name = argv[i+1];
i += 2;
} else if(streq(argv[i], "-TB_SINGLE")){
i++;
stand_alone = TBtrue;
} else if(streq(argv[i],"-TB_LOCAL_PORTS")){
i++;
local_ports = TBtrue;
} else
i++;
}
if((s = getenv("TB_VERBOSE")) &&
streq(s ,"true"))
TBverbose = TBtrue;
if((s = getenv("TB_LOCAL_PORTS")) &&
streq(s ,"true"))
local_ports = TBtrue;
if(stand_alone || !fun){ /* execute stand alone */
/* TBaddTermPort(0, fun); */
return TB_OK;
}
if(mkports(local_ports, tool_name, host_toolbus, &this_tool_id, &fromToolBus,
&toToolBus) == TB_ERROR)
err_fatal("TBinit -- can't connect to ToolBus");
TBaddTermPort(fromToolBus, fun);
Snd_Void = TBmake("snd-void()");
TBprotect(&Snd_Void);
trm = TBread(fromToolBus); /* obtain the tool signature from the ToolBus */
if(TBmatch(trm, "rec-do(signature(%t,%t))", &tool_in_sign, &tool_out_sign)){
TBsend(Snd_Void);
if(check_in_sign){
trm = (*check_in_sign)(tool_in_sign);
if(trm)
err_fatal("TBinit -- NOT IN INPUT SIGNATURE: %t", trm);
}
} else
err_fatal("signature information garbled: %t", trm);
return TB_OK;
}
term *handle_input_from_toolbus(term *e)
{
char *txt, *cmd_txt, output[MAXOUTPUT], *outp;
int n, len, r, status;
FILE *from_cmd;
term *arg;
outp = output;
if(TBmatch(e, "rec-terminate(%t)", &arg)){
unlink(tmp_in);
unlink(tmp_out);
exit(0);
} else if(TBmatch(e, "rec-eval(cmd(%s,input(%s)))", &cmd_txt, &txt)){
split_args(cmd_txt);
the_cmd = cmd;
len = strlen(txt);
goto exec_cmd;
} else if(TBmatch(e, "rec-eval(input(%s))", &txt)){
the_cmd = def_cmd;
len = strlen(txt);
goto exec_cmd;
} else if(TBmatch(e, "rec-eval(input-term(%t))", &arg)) {
the_cmd = def_cmd;
txt = TBsprintf("%t", arg);
len = strlen(txt);
goto exec_cmd;
} else if(TBmatch(e, "rec-eval(cmd(%s,input-term(%t)))", &cmd_txt, &arg)){
split_args(cmd_txt);
the_cmd = cmd;
txt = TBsprintf("%t", arg);
len = strlen(txt);
goto exec_cmd;
} else if(TBmatch(e, "rec-eval(input(%b))", &txt, &len)){
the_cmd = def_cmd;
exec_cmd:
if(addnewline)
txt[len++] = '\n';
exec_cmd(txt, len);
while ((r = wait(&status)) != cmd_pid && r != -1)
fprintf(stderr, "wait = %d\n", r);
if((from_cmd = fopen(tmp_out, "rb")) == NULL)
err_sys_fatal("Can't open tmp output file");
/* Mon May 3 17:36:12 MET DST 1999 mdejonge
*
* When output type != tb_term, we read the output of the command that
* we executed (stored in the file tmp_out) as string. When output type
* equals tb_term, we use TBreadTerm to read (and parse) the contents of
* that file to obtain an term.
*
* NOTE: With the new aterm library we would probably have used the function
* ATparse to obtain an aterm from a string.
*
*/
if( output_type != tb_term )
{
while((n=fread(outp, 1, 512, from_cmd)) > 0){
if(outp + n > &output[MAXOUTPUT])
err_fatal("Executed command produces too long output");
outp += n;
}
if(*(outp-1) == '\n' && !keepnewline) {
if(output_type == tb_bstring)
outp--;
else
*(outp-1) = '\0';
} else {
if(output_type != tb_bstring)
*outp++ = '\0';
}
fclose(from_cmd);
switch( output_type )
{
case tb_bstring:
return TBmake(TBfalse, "snd-value(output(%b))", output, outp-output);
case tb_string:
return TBmake(TBfalse, "snd-value(output(%s))", output);
case tb_term:
return NULL;
}
}
else
{
/* Mon May 3 17:36:12 MET DST 1999 mdejonge
*
* Construct a term from the contents of the file tmp_out by using
* the function TBreadTerm.
*/
term *t;
t = TBreadTerm( from_cmd );
fclose(from_cmd );
return TBmake(TBfalse, "snd-value(output(%t))", t );
}
}
TBmsg("Ignore: %t\n", e);
return NULL;
}
