Best way to copy a file in C?

I checked dos.library autodocs but couldn't spot a function to copy some file. Is there any ?

@Capehill
Quote:No.

Easiest way is probably something like
Or allocate a MEMF_SHARED buffer, for example 16 MB, fopen() source and dest files, fread()/fwrite() buffer size loop until done, fclose() source and dest files (or IDOS->FOpen()/FRead()/FWrite()/FClose() instead of the C library functions) and copy the protection bits, user/group and comment with IDOS->SetProtection(), IDOS->SetOwnerInfo() and IDOS->SetComment().

ask chatGPT, it knows Amiga stuff!

@joerg

Quote:Don't forget to set/clone the datestamp as well.

Best regards,

Niels

@NinjaCyborg

Quote:No need to mess with an AI when we have an RI (Jörg) at hand .

Best regards,

Niels

There's not AFAIK. I would have thought a copy function would be in place, to standardise this, with an optional hook to account for progress bars.

So there's only the old fashioned way. Open, read, write, rinse and repeat. Just using newer functions to examine file info. Not sure about being able to open file for write with specific attributes, to avoid resetting it later and causing wear.

@nbache
Quote:Yes, and there is something else I forgot to mention:
After opening the dest file and before the first write to it use IDOS->ChangeFileSize() to set the size of the dest file to the one of the source file. Requires using dos.library functions for everything instead of C library functions.
Using ChangeFileSize() minimizes the fragmentation of the new file, in best case it's just a single contiguous space, at least on SFS partitions that's important.
Even on SSD unfragmented files can be read and written much faster than fragmented ones.