리눅스 예제에서 이것이 어떤 것을 의미하나요??

#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
 
int main(int argc, char *argv[])
{
    struct stat finfo
    char fname[1024]; 
    if(argc > 1)
        strcpy(fname, argv[1]);
    else
        strcpy(fname, argv[0]);
     if(stat(fname, &finfo) == -1) {
        fprintf(stderr, "Couldn't stat %s \n", fname);
        exit(1);
      }
   printf("%s \n", fname);
   printf("ID of device: %d \n", finfo.st_dev);
   printf("Inode number: %d \n", finfo.st_ino);
   printf("File mode   : %o \n", finfo.st_mode);
   printf("Num of links: %d \n", finfo.st_nlink);
   printf("User ID     : %d \n", finfo.st_uid);
   printf("Group ID    : %d \n", finfo.st_gid);
   printf("Files size  : %d \n", finfo.st_size);
   printf("Last access time : %u \n", finfo.st_atim);
   printf("Last modify time : %u \n", finfo.st_mtim);
   printf("Last stat change : %u \n", finfo.st_ctim);
   printf("I/O Block size : %d \n", finfo.st_blksize);
   printf("Num of blocks  : %d \n", finfo.st_blocks);
   printf("File system : %s \n", finfo.st_fstype);
}    
     }