#include <stdio.h>
#include <stdlib.h>

#include <llapi.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <time.h> 

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>

#define CHAR_BUFFER 256
#define FILE_LENGTH 256

void reverse(char s[])
{
	int c,i,j;

	for(i=0,j=strlen(s)-1;i<j;i++,j--){
		c=s[i];
		s[i]=s[j];
		s[j]=c;
	}
}

void itoa(int n,char s[])
{
	int i, sign;
	
	if((sign = n) <0)
		n=-n;
	i=0;
	do{
		s[i++]=n%10+'0';
	} while((n/=10)>0);
	if(sign<0)
		s[i++]='-';
	s[i]='\0';
	reverse(s);
}

int main(int argc, char *argv[])
{
	int fd = -1;
	int fp;
	char* file;
	char buf[CHAR_BUFFER]="";
	char adrr[256] = "/home/mamon/michal/5_1/test_mon.txt";
	uid_t id;
	time_t rawtime;
	struct tm * timeinfo;

	time ( &rawtime );
	timeinfo = localtime ( &rawtime );  	

	fd = open(adrr,O_WRONLY | O_CREAT | O_APPEND, 0644); // DRMAA powinna byc thread-safe, wiec nazwa pliku musi byc za kazdym razem inna
	if(fd==-1)
		exit(0);
	
	file = malloc(FILE_LENGTH);
	memset(file,'\0',FILE_LENGTH);
	strftime (file, 40, "[%x %X] \n",timeinfo); 
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	gethostname(buf,CHAR_BUFFER);
	/*strcat(file,"Hostname: ");
	strcat(file,buf);
	strcat(file,"\n");*/
	sprintf(file,"Hostname: %s\n",buf);
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);

	/*memset(buf,'\0',CHAR_BUFFER);
	strcat(file,"UID: ");
	id = getuid();
	itoa(id,buf);
	strcat(file,buf);
	strcat(file,"\n");*/

	sprintf(file,"UID: %d\n",getuid());
	write(fd,file,FILE_LENGTH);
	
	memset(file,'\0',FILE_LENGTH);
	sprintf(file,"Getcwd: ");
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	getcwd(file,FILE_LENGTH);
	strcat(file,"\n");	
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	sprintf(file,"argv[1] - job_id: %s\n",argv[1]);	
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	sprintf(file,"argv[2] - user_arg: %s\n",argv[2]);	
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	sprintf(file,"argv[3] - state: %s\n",argv[3]);	
	write(fd,file,FILE_LENGTH);

	memset(file,'\0',FILE_LENGTH);
	sprintf(file,"argv[4] - exit_status: %s\n\n",argv[4]);
	write(fd,file,FILE_LENGTH);

	close(fd);

	return 0;
}