makefs.c

be文件系统实现的源码

/*
  This file contains the code that will call the initialization routine
  for a file system (which in turn will initialize the file system). It
  also has to do a few other housekeeping chores to make sure that the
  file system is unmounted properly and all that.
  
  
  THIS CODE COPYRIGHT DOMINIC GIAMPAOLO.  NO WARRANTY IS EXPRESSED 
  OR IMPLIED.  YOU MAY USE THIS CODE AND FREELY DISTRIBUTE IT FOR
  NON-COMMERCIAL USE AS LONG AS THIS NOTICE REMAINS ATTACHED.

  FOR COMMERCIAL USE, CONTACT DOMINIC GIAMPAOLO ([e-mail]).

  Dominic Giampaolo
  [e-mail]
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>

#include "myfs.h"
#include "kprotos.h"


static int
get_value(char *str)
{
    char buff[128];
    
    printf("%s: ", str); fflush(stdout);
    fgets(buff, sizeof(buff), stdin);

    return strtol(buff, NULL, 0);
}


int
main(int argc, char **argv)
{
    int        block_size = 1024, i;
    char      *disk_name = "big_file";
    char      *volume_name = "untitled";
    myfs_info  *myfs;

    for (i=1; i < argc; i++) {
        if (isdigit(argv[i][0])) {
            block_size = strtoul(argv[i], NULL, 0);
        } else if (disk_name == NULL) {
            disk_name = argv[i];
        } else {
            volume_name = argv[i];
        }
    }
    
    if (disk_name == NULL) {
        fprintf(stderr, "makefs error: you must specify a file name that\n");
        fprintf(stderr, "              will contain the file systemn");
        exit(5);
    }

    init_block_cache(256, 0);

    myfs = myfs_create_fs(disk_name, volume_name, block_size, NULL);
    if (myfs != NULL)
        printf("MYFS w/%d byte blocks successfully created on %s as %s\n",
               block_size, disk_name, volume_name);
    else {
        printf("!HOLA! FAILED to create a MYFS file system on %s\n", disk_name);
        exit(5);
    }

    myfs_unmount(myfs);

    shutdown_block_cache();

    return 0;   
}