C - ERROR not defined and storage unknown - c

Question

I have this code for deleting directories. I have header1.h, header1.c, main.c.
I get some errors, but the one is more difficult to me to understand is the errors:
(1) storage size of ffblk isn't known.
Also, i have the doubt of how to define the attributes of ffblk, which are ff_name and ff_attrib
This example is from various code examples from the internet(even other from here), all of them do the same code, just in my case it does not work.
Am i missing the definition of the struct? or maybe i have added code where it should not be any code?
Could you please help me? I dont usually program in C. and i am using Dev-Cpp.
header1.h:
#ifndef HEADER1_H_INCLUDED
#define HEADER1_H_INCLUDED
typedef struct ffblk ffblk;
#endif
header.c:
#include <stdio.h>
#include <stdlib.h>
#include "header1.h"
struct ffblk
{
char ff_attrib[20]; //this line i added just so dont show error of unknown
char ff_name[20]; //this line i added just so dont show error of unknown
};
main.c:
#ifndef FA_RDONLY
#define FA_RDONLY _A_RDONLY
#endif
#ifndef FA_HIDDEN
#define FA_HIDDEN _A_HIDDEN
#endif
#ifndef FA_SYSTEM
#define FA_SYSTEM _A_SYSTEM
#endif
#ifndef FA_DIREC
#define FA_DIREC _A_SUBDIR
#endif
#ifndef FA_ARCH
#define FA_ARCH _A_ARCH
#endif
# include <stdio.h>
# include <dos.h>
# include <dir.h>
# include <io.h>
# include <conio.h>
#include "header1.h"
typedef struct ffblk ffblk;
int BorrarArchivo(char *nombarch)
{
printf("Borrando Archivo %s \n",nombarch);
remove(nombarch);
return 0;
}
int EliminarAtributo(char *nombarch,int atributo)
{
printf("Elimina Atributo %s %d\n",nombarch,atributo);
chmod(nombarch,atributo);
return 0;
}
int BorrarArbol(void)
{
struct ffblk ffblk;
int done,err;
err=0;
done=findfirst("*.*",&ffblk,FA_RDONLY|FA_HIDDEN|FA_DIREC|FA_ARCH|FA_SYSTEM);
while (!done)
{
if (FA_HIDDEN & ffblk.ff_attrib)
EliminarAtributo(ffblk.ff_name,FA_HIDDEN);
if (FA_SYSTEM & ffblk.ff_attrib)
EliminarAtributo(ffblk.ff_name,FA_SYSTEM);
if (FA_RDONLY & ffblk.ff_attrib)
EliminarAtributo(ffblk.ff_name,FA_RDONLY);
if (FA_ARCH & ffblk.ff_attrib)
err=BorrarArchivo(ffblk.ff_name);
else if (FA_DIREC & ffblk.ff_attrib)
{
if (ffblk.ff_name[0]!='.')
{
chdir(ffblk.ff_name);
err=BorrarArbol();
chdir("..");
if (!err)
printf("Removiendo %s\n",ffblk.ff_name);
rmdir(ffblk.ff_name);
}
}
else
err=BorrarArchivo(ffblk.ff_name);
if (err)
{
printf("Error en el borrado ... !"); return err;
}
done=findnext(&ffblk);
}
return 0;
}
int main (void)
{ int err=0;
char c;
printf("Esta seguro [ Si -> S , No ->otra tecla ] =>");
c=getchar();
if (!(c=='S' || c=='s')) return 0;
err=BorrarArbol();
if (err) printf("Error en el borrado ... !");
return err;
}
EDIT:
I found a definition of struct and paste it in header.h
typedef struct ffblk {
char lfn_magic[6]; /* LFN: the magic "LFN32" signature */
short lfn_handle; /* LFN: the handle used by findfirst/findnext */
unsigned short lfn_ctime; /* LFN: file creation time */
unsigned short lfn_cdate; /* LFN: file creation date */
unsigned short lfn_atime; /* LFN: file last access time (usually 0) */
unsigned short lfn_adate; /* LFN: file last access date */
char ff_reserved[5]; /* used to hold the state of the search */
unsigned char ff_attrib; /* actual attributes of the file found */
unsigned short ff_ftime; /* hours:5, minutes:6, (seconds/2):5 */
unsigned short ff_fdate; /* (year-1980):7, month:4, day:5 */
unsigned long ff_fsize; /* size of file */
char ff_name[260]; /* name of file as ASCIIZ string */
}ffblk;
now it shows error:
C:\Users\1\AppData\Local\Temp\cc89P309.o:Untitled3.c:(.text+0x8e): undefined reference to `findfirst'
C:\Users\1\AppData\Local\Temp\cc89P309.o:Untitled3.c:(.text+0x1d8): undefined reference to `findnext'

Answer 1

At the end, the problem was always the functions findfirst(a,b,c) and findnext(a,b,c). I had to change the functions and use their version with 2 parameters and not 3. I put all the code in one file with the includes, typedef struct and the code below.