Function full_write

util1.c:278–295

* Write @p len bytes at @p ptr to descriptor @p desc, retrying if * interrupted. * * @retval len upon success * * @retval <0 write's (negative) error code * * Derived from GNU C's cccp.c. */

 * Derived from GNU C's cccp.c.
 */
int full_write(int desc, const char *ptr, size_t len)
{
	int total_written;

	total_written = 0;
	while (len > 0) {
		int written = write(desc, ptr, len);
		if (written < 0)  {
			if (errno == EINTR)
				continue;
			return written;
		}
		total_written += written;
		ptr += written;
		len -= written;
	}
	return total_written;
}

/**
 * Read @p len bytes at @p ptr from descriptor @p desc, retrying if