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fsdb.c
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/
fsdb.c
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/*--------------------------------------------------------------*/
/*---------------------------- fsdb.c --------------------------*/
/*--------------------------------------------------------------*/
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#include <linux/fs.h>
#include "../kern/ux_fs.h"
struct ux_superblock sb;
int devfd;
void
print_inode(int inum, struct ux_inode *uip)
{
char buf[UX_BSIZE];
struct ux_dirent *dirent;
int i, x;
printf("\ninode number %d\n", inum);
printf(" i_mode = %x\n", uip->i_mode);
printf(" i_nlink = %d\n", uip->i_nlink);
printf(" i_atime = %s",
ctime((time_t *)&uip->i_atime));
printf(" i_mtime = %s",
ctime((time_t *)&uip->i_mtime));
printf(" i_ctime = %s",
ctime((time_t *)&uip->i_ctime));
printf(" i_uid = %d\n", uip->i_uid);
printf(" i_gid = %d\n", uip->i_gid);
printf(" i_size = %d\n", uip->i_size);
printf(" i_blocks = %d", uip->i_blocks);
for (i=0 ; i<UX_DIRECT_BLOCKS; i++) {
if (i % 4 == 0) {
printf("\n");
}
printf(" i_addr[%2d] = %3d ",
i, uip->i_addr[i]);
}
/*
* Print out the directory entries
*/
if (uip->i_mode & S_IFDIR) {
printf("\n\n Directory entries:\n");
for (i=0 ; i < uip->i_blocks ; i++) {
lseek(devfd, uip->i_addr[i] * UX_BSIZE,
SEEK_SET);
read(devfd, buf, UX_BSIZE);
dirent = (struct ux_dirent *)buf;
for (x = 0 ; x < UX_DIRECT_BLOCKS ; x++) {
if (dirent->d_ino != 0) {
printf(" inum[%2d],"
"name[%s]\n",
dirent->d_ino,
dirent->d_name);
}
dirent++;
}
}
printf("\n");
} else {
printf("\n\n");
}
}
int read_inode(ino_t inum, struct ux_inode *uip)
{
if (sb.s_inode[inum] == UX_INODE_FREE) {
return -1;
}
lseek(devfd, (UX_INODE_BLOCK * UX_BSIZE) +
(inum * UX_BSIZE), SEEK_SET);
read(devfd, (char *)uip, sizeof(struct ux_inode));
return 0;
}
main(int argc, char **argv)
{
struct ux_inode inode;
char buf[512];
char command[512];
off_t nsectors;
int error, i, blk;
ino_t inum;
devfd = open(argv[1], O_RDWR);
if (devfd < 0) {
fprintf(stderr, "uxmkfs: Failed to open device\n");
exit(1);
}
/*
* Read in and validate the superblock
*/
read(devfd, (char *)&sb, sizeof(struct ux_superblock));
if (sb.s_magic != UX_MAGIC) {
printf("This is not a uxfs filesystem\n");
exit(1);
}
while (1) {
printf("uxfsdb > ") ;
fflush(stdout);
scanf("%s", command);
if (command[0] == 'q') {
exit(0);
}
if (command[0] == 'i') {
inum = atoi(&command[1]);
read_inode(inum, &inode);
print_inode(inum, &inode);
}
if (command[0] == 's') {
printf("\nSuperblock contents:\n");
printf(" s_magic = 0x%x\n", sb.s_magic);
printf(" s_mod = %s\n",
(sb.s_mod == UX_FSCLEAN) ?
"UX_FSCLEAN" : "UX_FSDIRTY");
printf(" s_nifree = %d\n", sb.s_nifree);
printf(" s_nbfree = %d\n\n", sb.s_nbfree);
}
}
}