Read write to SD card from Linux C program

[SimbadSubZero]

hi,
I would like to read and write files from / to SD card. I already have a driver for my SD card but I need to call it from user space.

Could someone know from where I could see some examples? I know that there is also an option to write from system command but this not a good option.

Thanks,
Simabd

[kbw]

Can't you just copy the files?

[SimbadSubZero]

Yes I could but I want from C programming, src code not from shell.

[kbw]

Just open the file. I presume the SD Card's already mounted.