thanks !
I will look at it

New results :
Initializing ...
Initializing SD card
Initializing SPIFF
Initializations done
----
Running tests with a non existing file on :
SD card : r a w r+ a+ w+
SPIFFS : r a w r+ a+ w+
Running tests with a existing empty file on :
SD card : r a w r+ a+ w+
SPIFFS : r a w r+ a+ w+
Running ...

summary

Initializing SPIFF
Initializing SD card
Initializations done
Support Mode Open Size Position Available Size Position Available
SD card r OK
SD card a OK NOK OK NOK OK OK OK
SD card w OK NOK OK NOK OK OK OK
SPIFFS r NOK
SPIFFS a OK NOK OK NOK NOK OK NOK
SPIFFS w OK NOK OK NOK NOK OK NOK ...

Hi,

can somebody explain me the reasons for such different types when manipulating Files and not only one : size_t

below, we have : size_t (unsigned int), uint32_t , int :?:

FS.h extract
size_t write(uint8_t) override;
size_t write(const uint8_t *buf, size_t size) override;
int available ...

I extended the previous program to also tests SPIFFS and various file modes,
the results are badly impressive ... :o :shock:

To me there are clearly bugs, for example on SPIFFS, opening a non existing file in read mode will return a File object, when it clearly should not !
If a specialist of ...

Hello,

this is the rework of my previous post "Incorrect File object information after file creation on a SD card and on SPIFFS"

I extended the investigation and modified the test program that lead me to conclude that the implementation of the Arduino ESP32 file manipulation do not comply with ...

thanks @ESp_iggr

I switched to from FILE_WRITE to "a+" , and no more error ...

in the file <FS.h> the only possible options for open are :
namespace fs
{

#define FILE_READ "r"
#define FILE_WRITE "w"
#define FILE_APPEND "a"

class File;

Here is the output of the above program :

initialization done
Openning file : /f1.txt
Writing to file : /f1.txt
Current Position : 32
New ...

Hello
the following code end up with a read returning -1
I don't see what I am missing here ... :(
if you have ideas, thanks much !


#include <Arduino.h>
#include <SPI.h>
#include <SD.h>
#include <errno.h>
#include <WiFi.h>
#include <time.h>
#include <sys/time.h>
#include <Wire.h>
#include ...