/* Try different input methods along with different permitted file */
/* actions. Lots of unexpected results!				   */

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

main(argc,argv)
int argc;
char *argv[];
{int fd,n;
 FILE *fp;
 if (argc<2) {
  printf("Specify the file!!!\n");
  exit(1);
 } 
 printf("fdopen using r\n");
 fd=open(argv[1],O_RDONLY);
 printf("READ ONLY\n");
 fp=fdopen(fd,"r");
 fscanf(fp,"%i",&n);
 printf("fscanf(ed) %d\n",n);
 fseek(fp,0,SEEK_SET);
 fread(&n,sizeof(int),1,fp);
 printf("fread(ed) %d\n",n);
 lseek(fd,0,SEEK_SET);
 read(fd,&n,sizeof(int));
 printf("read(ed) %d\n",n);
 fclose(fp);
 fd=open(argv[1],O_RDWR);
 printf("READ WRITE\n");
 fp=fdopen(fd,"r");
 fscanf(fp,"%i",&n);
 printf("fscanf(ed) %d\n",n);
 fseek(fp,0,SEEK_SET);
 fread(&n,sizeof(int),1,fp);
 printf("fread(ed) %d\n",n);
 lseek(fd,0,SEEK_SET);
 read(fd,&n,sizeof(int));
 printf("read(ed) %d\n",n);
 fclose(fp);
 printf("fdopen using w\n");
 fd=open(argv[1],O_RDONLY);
 printf("READ ONLY\n");
 fp=fdopen(fd,"w");
 fscanf(fp,"%i",&n);
 printf("fscanf(ed) %d\n",n);
 fseek(fp,0,SEEK_SET);
 fread(&n,sizeof(int),1,fp);
 printf("fread(ed) %d\n",n);
 lseek(fd,0,SEEK_SET);
 read(fd,&n,sizeof(int));
 printf("read(ed) %d\n",n);
 fclose(fp);
 fd=open(argv[1],O_RDWR);
 printf("READ WRITE\n");
 fp=fdopen(fd,"w");
 fscanf(fp,"%i",&n);
 printf("fscanf(ed) %d\n",n);
 fseek(fp,0,SEEK_SET);
 fread(&n,sizeof(int),1,fp);
 printf("fread(ed) %d\n",n);
 lseek(fd,0,SEEK_SET);
 read(fd,&n,sizeof(int));
 printf("read(ed) %d\n",n);
 fclose(fp);
}