Date: Wed, 8 Oct 1997 00:04:03 +0200 From: j@uriah.heep.sax.de (J Wunsch) To: freebsd-hackers@FreeBSD.ORG Cc: mdean@best.com (mdean) Subject: Re: Device Drivers Message-ID: <19971008000403.RT08354@uriah.heep.sax.de> In-Reply-To: <Pine.SGI.3.95.971006234141.3491A-100000@shellx.best.com>; from mdean on Oct 6, 1997 23:49:55 -0700 References: <Pine.SGI.3.95.971006234141.3491A-100000@shellx.best.com>
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As mdean wrote: > d_stop Stop tty output (i believe) > d_reset (Can't find any use of it.) > d_devtotty Convert a dev_t into a struct tty *. Useful for tty drivers only, obviously. > d_strategy (I've seen this one in another unix book, I just can't remeber > what it is actually used for) Something you should read a Unix driver book for. The central IO routine for `strategy-controlled' IO, like disk drivers. > and why does d_maj=-1 in the driver when I would think you need to set it > to the major of your device. Dynamic major # assignment. The ultimate goal once devfs is running completely, but currently probably not very useful. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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