I didn't look at the file but I find that perfectly comprehensible. I can see read & write pointers in a buffer, n as bytes copied. Not sure if p is source or d

I didn't look at the file but I find that perfectly comprehensible. I can see read & write pointers in a buffer, n as bytes copied. Not sure if p is source or dest w/out looking but my guess is dest? Maybe it's a cultural thing - lots of C code looks like this from Lion's UNIX book onwards. I still find this style easier on the eyes when it's clear from context what is going on. For i/o code this is about as obscure as using "i" for a loop index.