testcases/kernel/fs/fs-bench/create-files.c

/* create.c (GPL)*/
/* Hironobu SUZUKI <hironobu@h2np.net> */
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <time.h>
#include <stdlib.h>

#define MAXN 4096

#define MAXFSIZE 1024 * 192

char wbuf[MAXFSIZE];
static int filecount=0;

void makedir(char *dir1);
void changedir(char *dir);
void create_file(char *filename);

extern int box_muler(int, int);

int startc=0;
int main(int ac,char *av[])
{
  int i=0;
  int j=0;
  int k=0;
  int l=0;
  char dir1[MAXN];
  char dir2[MAXN];
  char dir3[MAXN];
  char filename[MAXN];
  time_t t;
  int maxfiles=0xFFFFFF;
  int createfiles=0;

  if (ac > 1) {
    sscanf(av[1],"%x",&maxfiles);
    if (maxfiles==0) {
      printf("maxfile argument error (0 value)\n");
      exit(1);
    }
  }
  time(&t);
  srandom((unsigned int)getpid()^(((unsigned int)t<<16)| (unsigned int)t>>16));
  printf("Create files\n");
  for (i = 0 ; i < 0xFF ; i++) {
    sprintf(dir1,"%2.2x",i);
    makedir(dir1);
    changedir(dir1);
    for (j = 0 ; j < 0xFF ; j++) {
      sprintf(dir2,"%2.2x",j);
      makedir(dir2);
      changedir(dir2);
      for (k = 0 ; k < 0xFF ; k++) {
	sprintf(dir3,"%2.2x",k);
	makedir(dir3);
	changedir(dir3);
	for (l = 0 ; l < 0xFF ; l++) {
	  sprintf(filename,"%s%s%s%2.2x",dir1,dir2,dir3,l);
	  create_file(filename);
	  if (maxfiles < createfiles++) {
	    goto end;
	  }
	}
	changedir("../");
      }
      changedir("../");
    }
    changedir("../");
  }
end:
  fprintf(stderr,"\nTotal create files: %d\n",filecount);
  printf("Done\n");
        return 0;
}

int showchar[]={124,47,45,92,124,47,45,92};

void makedir(char *dir1)
{
  if (mkdir(dir1, S_IRWXU) < 0) {
    perror(dir1);
    exit(1);
  }
}

void changedir(char *dir)
{
  if (chdir(dir) < 0) {
    perror(dir);
    exit(1);
  }
}

void create_file(char *filename)
{
  int fd;
  int randomsize;
  if ((fd=creat(filename, S_IRWXU)) < 0) {
    fprintf(stderr,"\nTotal create files: %d\n",filecount);
    perror(filename);
    exit(1);
  }
  if ((randomsize=box_muler(0,MAXFSIZE)) < 0) {
    randomsize = MAXFSIZE;
  }
  if (write(fd,wbuf,randomsize) < 0) {
    fprintf(stderr,"\nTotal create files: %d\n",filecount);
    perror(filename);
    exit(1);
  }
  filecount++;
  close(fd);
}