Date: Tue, 14 Sep 1999 11:51:42 +0930 From: Greg Lehey <grog@lemis.com> To: Mark Ovens <mark@dogma.freebsd-uk.eu.org>, Ben Smithurst <ben@scientia.demon.co.uk> Cc: "Michael W. Akers" <mwakers@home.com>, questions@FreeBSD.ORG Subject: Re: Where's the source Luke? Message-ID: <19990914115142.Z10106@freebie.lemis.com> In-Reply-To: <19990913235609.A276@marder-1>; from Mark Ovens on Mon, Sep 13, 1999 at 11:56:09PM %2B0100 References: <19990913200752.A2529@marder-1> <19990913222616.A48265@lithium.scientia.demon.co.uk> <01BEFDE7.E679FEA0@c67050-a.plstn1.sfba.home.com> <19990913235609.A276@marder-1>
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On Monday, 13 September 1999 at 23:56:09 +0100, Mark Ovens wrote:
> On Mon, Sep 13, 1999 at 01:00:04PM -0700, Michael W. Akers wrote:
>> On Monday, September 13, 1999 12:08 PM, Mark Ovens <mark@dogma.freebsd-uk.eu.org> wrote:
>>> To: questions@FreeBSD.ORG
>>> Subject: Where's the source Luke?
>>>
>>> Can someone tell me where to find the source code for ioctl()? I've
>>> searched all the .c files under /usr/src/sys and have found plenty
>>> of functions called xxxx_ioctl, e.g. kbd_ioctl(), but not a plain
>>> ``ioctl()''.
>>>
>>> I'm beginning to think that a call to ioctl() gets mapped to some
>>> function specific to the device.
>>>
>>> The particular instance I'm interested in is in video_mode() in
>>> vidcontrol.c:
>>>
>>> if (*index < argc) {
>>> for (i = 0; modes[i].name != NULL; ++i) {
>>> if (!strcmp(argv[*index], modes[i].name)) {
>>> mode = modes[i].mode;
>>> break;
>>> }
>>> }
>>>
>>> if (modes[i].name == NULL)
>>> return;
>>> =====>> if (ioctl(0, mode, NULL) < 0) <<===============
>>> warn("cannot set videomode");
>>>
>>> Thanks.
>>
>> Found it in /usr/src/lib/libstand
>
> Thanks:)
>
> Since it's part of the kernel I figured it would be under /usr/src/sys.
> Guess I should have started one level higher.
No, that's for the standalone utilities.
On Monday, 13 September 1999 at 22:26:16 +0100, Ben Smithurst wrote:
> Mark Ovens wrote:
>
>> Can someone tell me where to find the source code for ioctl()? I've
>> searched all the .c files under /usr/src/sys and have found plenty
>> of functions called xxxx_ioctl, e.g. kbd_ioctl(), but not a plain
>> ``ioctl()''.
>
> It seems to be in /sys/kern/sys_generic.c. Just grep for ^ioctl
This is the correct answer. Use ctags or etags to find function
definitions.
Greg
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