ssize_t read(int fd, void* buf, size_t count);
Reads count bytes from the file handle fd, and places the result in buf. Returns the number of bytes read, or the negation of the error code on error. It is possible for the number of bytes read to be smaller than the number of bytes requested.
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If the system call is interrupted, this function will return -EINTR. This differs from most C runtimes, where -1 is returned with errno set to EINTR. As this runtime does not have errno, callers should check for -EINTR and a result less than zero in the error checking code. |