Date: Fri, 23 Apr 2010 19:32:39 +0300 From: Andriy Gapon <avg@freebsd.org> To: freebsd-scsi@freebsd.org Subject: Re: cam.3: do not discourage use of cam_open_device Message-ID: <4BD1CBA7.6020405@freebsd.org> In-Reply-To: <4BCDEBF6.3030609@icyb.net.ua>
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on 20/04/2010 21:01 Andriy Gapon said the following: > This is based on my understanding what Scott Long tried to explain me a while ago. > > Index: lib/libcam/cam.3 > =================================================================== > --- lib/libcam/cam.3 (revision 206902) > +++ lib/libcam/cam.3 (working copy) > @@ -190,12 +190,6 @@ > Once the device name and unit number > are determined, a lookup is performed to determine the passthrough device > that corresponds to the given device. > -.Fn cam_open_device > -is rather simple to use, but it is not really suitable for general use > -because its behavior is not necessarily deterministic. > -Programmers writing > -new applications should make the extra effort to use one of the other open > -routines documented below. > .Pp > .Fn cam_open_spec_device > opens the If no one tries to stop me I will commit this. > It seems that this warning about ambiguity came from pre-devfs days when e.g. cd0 > nodes in different directories could correspond to different actual SCSI > peripherals. It seems that there wasn't an ambiguity if an absolute device path > was given. > > Nowadays, cam_open_device seems to always do a proper job of finding a correct > pass device. > -- Andriy Gaponhelp
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