Littlefs to delete the file

[Tushar_V]

Hi all,

i am using Littlefs in nrf_connect_sdk,

how can i flush the contents of file

Regards

Tushar

[ovrebekk]

Hi Tushar

You can use the lfs_file_sync(..) function for this.

Best regards
Torbjørn 

[Tushar_V]

Hi, Torbjorn,

I'am running ../zephyr/samples/subsys/fs/littlefs example

is there any way i can empty the file once after reading it

Regards

Tushar

[ovrebekk]

Hi Tushar

You mean you want to delete the file entirely, or you just want to clear all the content of the file?

Best regards
Torbjørn

[Tushar_V]

Hi Torbjorn,

i want to clear the contents of file

Regards

Tushar

[ovrebekk]

Hi Tushar

There is no function for clearing a file directly. 

Either you would have to use fs_write() to overwrite the existing data with 0's, or you could possibly use the fs_truncate() function twice. One time to reduce the size of the file to 0, and a second time to increase the size back to the original size (but now filled with 0's only). 

As a side note, ignore my previous suggestion to use the lfs_file_sync() method, instead the fs_sync() method should be used for flushing the data buffers. 

Best regards
Torbjørn