Sometime Today, Devdas Bhagat assembled some asciibets to say:
> /*
> * The OP should tell us why he/she is using read and write instead of
> * fread and fwrite, or perhaps rename to move the file instead
> */
irrelevant. fread/fwrite won't work on file descriptors. They require
FILE pointers. open/creat/socket return file descriptors.
> while (fd) {
and who sets fd to 0?
> if (n < sizeof(buff)) { /* Short read, eof? */
this is a short read. it does not mean eof. eof is signalled by a
return value of 0. n < requested size just means that fewer bytes than
requested were available at the time.
> close_check = close(fd); /* Close file */
don't close here. close only if n == 0. If n < 0, check for errno of
EINTR or EAGAIN, and redo the read.
Philip
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If you can't understand it, it is intuitively obvious.
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