add debug logs

configure using config file (generated by the master)
implementation of message passing (send and receive)

git-svn-id: svn+ssh://cvs.lpds.sztaki.hu/var/lib/svn/szdg/dcapi/trunk@738 a7169a2c-3604-0410-bc95-c702d8d87f7a

dcapi/condor/condor_slave.c

@@ -2,17 +2,30 @@
 /* c-file-style: "linux" */
 /* End: */
 
+#include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <unistd.h>
 
 #include "dc_common.h"
 #include "dc_client.h"
+#include "dc_internal.h"
+
+#include "condor_common.h"
+#include "condor_slave.h"
 
 
 /* Initializes the client API. */
 int DC_initClient(void)
 {
-	return(0);
+	int ret= _DC_parseCfg(CLIENT_CONFIG_NAME);
+	if (ret)
+		fprintf(stderr, "Error parsing configfile %s",
+			CLIENT_CONFIG_NAME);
+	DC_log(LOG_DEBUG, "Slave dcapi initialized");
+	return(ret);
 }
 
 
@@ -20,9 +33,13 @@ int DC_initClient(void)
 char *DC_resolveFileName(DC_FileType type,
 			 const char *logicalFileName)
 {
+	/* init_log calls this fn, so it is not possible to call DC_log
+	   from here */
+	/*DC_log(LOG_DEBUG, "DC_resolveFileName(%d,%s)",
+	  type, logicalFileName);*/
 	if (!strcmp(logicalFileName, DC_CHECKPOINT_FILE))
-		return("dc_checkpoint.txt");
+		return(strdup(CKPT_LABEL));
-	return((char*)logicalFileName);
+	return(strdup((char*)logicalFileName));
 }
 
 
@@ -31,45 +48,165 @@ int DC_sendResult(const char *logicalFileName,
 		  const char *path,
 		  DC_FileMode fileMode)
 {
-	return(0);
+	DC_log(LOG_DEBUG, "DC_sendResult(%s,%s,%d)",
+	       logicalFileName,
+	       path,
+	       fileMode);
+	return(DC_ERR_NOTIMPL);
 }
 
 
+static int _DC_message_id= 0;
+
 /* Sends a message to the master. */
 int DC_sendMessage(const char *message)
 {
-	return(0);
+	char fn[254];
+	FILE *f;
+
+	DC_log(LOG_DEBUG, "DC_sendMessage(%s)", message);
+	mkdir("client_messages", S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH);
+	_DC_message_id++;
+	sprintf(fn, "client_messages/message.%d", _DC_message_id);
+	if ((f= fopen(fn, "w")) != NULL)
+	{
+		fprintf(f, "%s", message);
+		fclose(f);
+		DC_log(LOG_DEBUG, "Message %d created", _DC_message_id);
+	}
+	else
+	{
+		DC_log(LOG_ERR, "Error creating message file (%d)",
+		       _DC_message_id);
+		return(DC_ERR_SYSTEM);
+	}
+
+	return(DC_OK);
 }
 
 
 /* Checks for application control events. */
 DC_ClientEvent *DC_checkClientEvent(void)
 {
-	return(0);
+	char *dn;
+	DIR *d;
+	struct dirent *de;
+	int min_id;
+	DC_ClientEvent *e= NULL;
+
+	dn= strdup("master_messages");
+	d= opendir(dn);
+	min_id= -1;
+	while (d &&
+	       (de= readdir(d)) != NULL)
+	{
+		char *found= strstr(de->d_name, "message.");
+		if (found)
+		{
+			char *pos= strrchr(de->d_name, '.');
+			if (pos)
+			{
+				int id= 0;
+				pos++;
+				id= strtol(pos, NULL, 10);
+				if (id > 0)
+				{
+					if (min_id < 0)
+						min_id= id;
+					else
+						if (id < min_id)
+							min_id= id;
+				}
+			}
+		}
+	}
+	if (d)
+		closedir(d);
+	if (min_id >= 0)
+	{
+		FILE *f;
+		dn= realloc(dn, 100);
+		sprintf(dn, "master_messages/message.%d", min_id);
+		DC_log(LOG_DEBUG, "Reading message from %s", dn);
+		if ((f= fopen(dn, "r")) != NULL)
+		{
+			char *cont;
+			int bs= 100, i;
+			char c;
+
+			cont= malloc(bs);
+			i= 0;
+			cont[i]= '\0';
+			while ((c= fgetc(f)) != EOF)
+			{
+				if (i > bs-2)
+				{
+					bs+= 100;
+					cont= realloc(cont, bs);
+				}
+				cont[i]= c;
+				i++;
+				cont[i]= '\0';
+			}
+			if (i > 0)
+			{
+				if ((e= calloc(1, sizeof(DC_ClientEvent))))
+				{
+					DC_log(LOG_DEBUG, "API event created: "
+					       "%p", e);
+					e->type= DC_CLIENT_MESSAGE;
+					e->message= cont;
+					DC_log(LOG_DEBUG, "Message of the "
+					       "event: %s",
+					       e->message);
+				}
+				else
+					DC_log(LOG_ERR, "Failed to create "
+					       "API event, memory allocation "
+					       "error");
+			}
+			fclose(f);
+			if (e)
+				unlink(dn);
+		}
+	}
+	if (dn)
+		free(dn);
+	return(e);
 }
 
 
 /* Destroys the event-specific data returned by DC_checkClientEvent(). */
 void DC_destroyClientEvent(DC_ClientEvent *event)
 {
+	DC_log(LOG_DEBUG, "DC_destroyClientEvent(%p)", event);
+	if (event)
+	{
+		if (event->message)
+			free(event->message);
+		free(event);
+	}
 }
 
 
 /* Indicates that an application-level checkpoint has completed. */
 void DC_checkpointMade(const char *fileName)
 {
+	DC_log(LOG_DEBUG, "DC_checkpointMade(%s)", fileName);
 }
 
 
 /* Informs the user interface about the fraction of work already done. */
 void DC_fractionDone(double fraction)
 {
+	DC_log(LOG_DEBUG, "DC_fractionDone(%g)", fraction);
 }
 
 
 /* Finishes computation. */
 void DC_finishClient(int exitcode)
 {
+	DC_log(LOG_DEBUG, "DC_finishClient(%d)", exitcode);
 	exit(exitcode);
 }