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On Mon Nov 21 11, Benjamin Kaduk wrote:
> On Mon, 21 Nov 2011, Alexander Best wrote:
>
> >On Mon Nov 21 11, Alexander Best wrote:
> >>On Mon Nov 21 11, Benjamin Kaduk wrote:
> >>>On Mon, 21 Nov 2011, per...@pluto.rain.com wrote:
> >>>
> Alexander Best wrote:
>
> >here's a revised pat
On Mon, 21 Nov 2011, Alexander Best wrote:
On Mon Nov 21 11, Alexander Best wrote:
On Mon Nov 21 11, Benjamin Kaduk wrote:
On Mon, 21 Nov 2011, per...@pluto.rain.com wrote:
Alexander Best wrote:
here's a revised patch.
...
+.Sh CAVEATS
+If the
+.Fn lseek
+system call is operating on a dev
On Mon Nov 21 11, Alexander Best wrote:
> On Mon Nov 21 11, Benjamin Kaduk wrote:
> > On Mon, 21 Nov 2011, per...@pluto.rain.com wrote:
> >
> > >Alexander Best wrote:
> > >
> > >>here's a revised patch.
> > >>...
> > >>+.Sh CAVEATS
> > >>+If the
> > >>+.Fn lseek
> > >>+system call is operating on
On Mon Nov 21 11, Benjamin Kaduk wrote:
> On Mon, 21 Nov 2011, per...@pluto.rain.com wrote:
>
> >Alexander Best wrote:
> >
> >>here's a revised patch.
> >>...
> >>+.Sh CAVEATS
> >>+If the
> >>+.Fn lseek
> >>+system call is operating on a device, which is incapable of seeking,
> >>+it will request
On Mon, 21 Nov 2011, per...@pluto.rain.com wrote:
Alexander Best wrote:
here's a revised patch.
...
+.Sh CAVEATS
+If the
+.Fn lseek
+system call is operating on a device, which is incapable of seeking,
+it will request the seek operation and complete successfully.
I think it would be better
On 21/11/11 5:45 PM, "per...@pluto.rain.com" wrote:
>Alexander Best wrote:
>
>> here's a revised patch.
>> ...
>> +.Sh CAVEATS
>> +If the
>> +.Fn lseek
>> +system call is operating on a device, which is incapable of seeking,
>> +it will request the seek operation and complete successfully.
>
>
Alexander Best wrote:
> here's a revised patch.
> ...
> +.Sh CAVEATS
> +If the
> +.Fn lseek
> +system call is operating on a device, which is incapable of seeking,
> +it will request the seek operation and complete successfully.
I think it would be better without the first comma (after "device")
On Sun Nov 20 11, Dieter BSD wrote:
> > something like the following inside lseek() would take care of tape drives:
> >
> > if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
> > if (ioctl(io->fd, FIODTYPE, &type) == -1)
> > err(1, "%s", io->name);
> >
>
> something like the following inside lseek() would take care of tape drives:
>
> if (S_ISCHR(sb.st_mode) || S_ISBLK(sb.st_mode)) {
> if (ioctl(io->fd, FIODTYPE, &type) == -1)
> err(1, "%s", io->name);
>
> if (type & D_TAPE)
>
On Sat Nov 19 11, Tim Kientzle wrote:
>
> On Nov 18, 2011, at 12:31 PM, Alexander Best wrote:
>
> > On Fri Nov 18 11, Tim Kientzle wrote:
> >>
> >> Take a look at
> >>
> >> http://libarchive.googlecode.com/svn/trunk/libarchive/archive_read_open_filename.c
> >>
> >> Especially the comments abo
On Sun Nov 20 11, Alexander Best wrote:
> On Sun Nov 20 11, Alexander Best wrote:
> > On Sat Nov 19 11, Tim Kientzle wrote:
> > >
> > > On Nov 18, 2011, at 12:31 PM, Alexander Best wrote:
> > >
> > > > On Fri Nov 18 11, Tim Kientzle wrote:
> > > >>
[snip]
>
> so...any thoughts regarding this
On Sun Nov 20 11, Alexander Best wrote:
> On Sat Nov 19 11, Tim Kientzle wrote:
> >
> > On Nov 18, 2011, at 12:31 PM, Alexander Best wrote:
> >
> > > On Fri Nov 18 11, Tim Kientzle wrote:
> > >>
> > >> Take a look at
> > >>
> > >> http://libarchive.googlecode.com/svn/trunk/libarchive/archive_r
On Sat Nov 19 11, Tim Kientzle wrote:
>
> On Nov 18, 2011, at 12:31 PM, Alexander Best wrote:
>
> > On Fri Nov 18 11, Tim Kientzle wrote:
> >>
> >> Take a look at
> >>
> >> http://libarchive.googlecode.com/svn/trunk/libarchive/archive_read_open_filename.c
> >>
> >> Especially the comments abo
On Nov 18, 2011, at 12:31 PM, Alexander Best wrote:
> On Fri Nov 18 11, Tim Kientzle wrote:
>>
>> Take a look at
>>
>> http://libarchive.googlecode.com/svn/trunk/libarchive/archive_read_open_filename.c
>>
>> Especially the comments about detecting "disk-like" devices.
>> I rewrote a bunch of
On Nov 18, 2011, at 2:10 PM, Juergen Lock wrote:
> On Fri, Nov 18, 2011 at 12:00:07PM -0800, Tim Kientzle wrote:
>>
>> On Nov 17, 2011, at 12:55 PM, Juergen Lock wrote:
>>
After a few experiments, bsdtar stopped using lseek() on
FreeBSD for anything other than regular files and
On Fri, Nov 18, 2011 at 12:00:07PM -0800, Tim Kientzle wrote:
>
> On Nov 17, 2011, at 12:55 PM, Juergen Lock wrote:
>
> >>
> >> After a few experiments, bsdtar stopped using lseek() on
> >> FreeBSD for anything other than regular files and block
> >> devices. I believe there are other things t
On Fri Nov 18 11, Alexander Best wrote:
> On Fri Nov 18 11, Tim Kientzle wrote:
> > On Nov 17, 2011, at 1:48 PM, Alexander Best wrote:
> >
> > > On Thu Nov 17 11, Dieter BSD wrote:
> > >>> lseek() on a tape drive does not return an error, nor does it
> > >>> actually do anything.
> > >>
> > >> II
On Fri Nov 18 11, Tim Kientzle wrote:
> On Nov 17, 2011, at 1:48 PM, Alexander Best wrote:
>
> > On Thu Nov 17 11, Dieter BSD wrote:
> >>> lseek() on a tape drive does not return an error, nor does it
> >>> actually do anything.
> >>
> >> IIRC some tape drives can seek, while others cannot.
> >>
On Nov 17, 2011, at 1:48 PM, Alexander Best wrote:
> On Thu Nov 17 11, Dieter BSD wrote:
>>> lseek() on a tape drive does not return an error, nor does it
>>> actually do anything.
>>
>> IIRC some tape drives can seek, while others cannot.
>> Vague memories that it is supposed to be possible to p
On Fri Nov 18 11, Tim Kientzle wrote:
>
> On Nov 17, 2011, at 12:55 PM, Juergen Lock wrote:
>
> >>
> >> After a few experiments, bsdtar stopped using lseek() on
> >> FreeBSD for anything other than regular files and block
> >> devices. I believe there are other things that do support
> >> seek
On Nov 17, 2011, at 12:55 PM, Juergen Lock wrote:
>>
>> After a few experiments, bsdtar stopped using lseek() on
>> FreeBSD for anything other than regular files and block
>> devices. I believe there are other things that do support
>> seeking, but I don't believe there is an accurate mechanis
On Fri, Nov 18, 2011 at 4:13 AM, Stefan Esser wrote:
> I have no idea, whether tape drives are still in wide use. For the
> purposes that I administrated and used tapes for (gamma/particle
> coincidence spectroscopy and large numerical simulations), large disk
> arrays have completely replaced ta
Am 18.11.2011 06:00, schrieb per...@pluto.rain.com:
> "Dieter BSD" wrote:
>> IIRC some tape drives can seek, while others cannot.
>> Vague memories that it is supposed to be possible to put a
>> filesystem on a DECtape and mount the filesystem.
>
> Back in the Bell Labs 6th Edition days, it was p
In article you write:
>On Nov 16, 2011, at 4:24 PM, Alexander Best wrote:
>
>> On Thu Nov 17 11, Joerg Sonnenberger wrote:
>>> On Wed, Nov 16, 2011 at 01:14:28PM +, Alexander Best wrote:
On Wed Nov 16 11, Joerg Sonnenberger wrote:
> On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander
"Dieter BSD" wrote:
> IIRC some tape drives can seek, while others cannot.
> Vague memories that it is supposed to be possible to put a
> filesystem on a DECtape and mount the filesystem.
Back in the Bell Labs 6th Edition days, it was possible to put
a filesystem on a _9-track magtape_ and mount
Alexander Best wrote:
> since i've never worked with tape: what file type does it identify
> as? character special file, or block special file, or ...?
IIUC all devices are now character, block devices having been
dropped from FreeBSD some time ago. Come to think of it, it
would not be altoget
On Thu Nov 17 11, Dieter BSD wrote:
> > lseek() on a tape drive does not return an error, nor does it
> > actually do anything.
>
> IIRC some tape drives can seek, while others cannot.
> Vague memories that it is supposed to be possible to put a
> filesystem on a DECtape and mount the filesystem.
On Thu Nov 17 11, Dieter BSD wrote:
> > lseek() on a tape drive does not return an error, nor does it
> > actually do anything.
>
> IIRC some tape drives can seek, while others cannot.
> Vague memories that it is supposed to be possible to put a
> filesystem on a DECtape and mount the filesystem.
> lseek() on a tape drive does not return an error, nor does it
> actually do anything.
IIRC some tape drives can seek, while others cannot.
Vague memories that it is supposed to be possible to put a
filesystem on a DECtape and mount the filesystem.
It might be that FreeBSD doesn't currently supp
On Wed Nov 16 11, Tim Kientzle wrote:
>
> On Nov 16, 2011, at 4:24 PM, Alexander Best wrote:
>
> > On Thu Nov 17 11, Joerg Sonnenberger wrote:
> >> On Wed, Nov 16, 2011 at 01:14:28PM +, Alexander Best wrote:
> >>> On Wed Nov 16 11, Joerg Sonnenberger wrote:
> On Tue, Nov 15, 2011 at 08:2
On Nov 16, 2011, at 4:24 PM, Alexander Best wrote:
> On Thu Nov 17 11, Joerg Sonnenberger wrote:
>> On Wed, Nov 16, 2011 at 01:14:28PM +, Alexander Best wrote:
>>> On Wed Nov 16 11, Joerg Sonnenberger wrote:
On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander Best wrote:
> one of the
On Thu Nov 17 11, Joerg Sonnenberger wrote:
> On Wed, Nov 16, 2011 at 01:14:28PM +, Alexander Best wrote:
> > On Wed Nov 16 11, Joerg Sonnenberger wrote:
> > > On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander Best wrote:
> > > > one of the things i'm missing is an easy way to determine, whet
On Wed, Nov 16, 2011 at 01:14:28PM +, Alexander Best wrote:
> On Wed Nov 16 11, Joerg Sonnenberger wrote:
> > On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander Best wrote:
> > > one of the things i'm missing is an easy way to determine, whether a
> > > stream or
> > > fd is seekable. i check
On Wed Nov 16 11, Alexander Best wrote:
> On Wed Nov 16 11, Alexander Best wrote:
> > On Wed Nov 16 11, Alexander Best wrote:
> > > On Tue Nov 15 11, Brandon Gooch wrote:
> > > > On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
> > > > >
> > > > > hi there,
> > > > >
> > > > > one of the things i'
On Wed Nov 16 11, Alexander Best wrote:
> On Wed Nov 16 11, Alexander Best wrote:
> > On Wed Nov 16 11, Alexander Best wrote:
> > > On Tue Nov 15 11, Brandon Gooch wrote:
> > > > On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
> > > > >
> > > > > hi there,
> > > > >
> > > > > one of the things i'
On Wed Nov 16 11, Joerg Sonnenberger wrote:
> On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander Best wrote:
> > one of the things i'm missing is an easy way to determine, whether a stream
> > or
> > fd is seekable. i checked the dd(1) and hd(1) sources and those tools are
> > performing so much
On Wed Nov 16 11, Alexander Best wrote:
> On Wed Nov 16 11, Alexander Best wrote:
> > On Tue Nov 15 11, Brandon Gooch wrote:
> > > On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
> > > >
> > > > hi there,
> > > >
> > > > one of the things i'm missing is an easy way to determine, whether a
> > > s
On Wed Nov 16 11, Alexander Best wrote:
> On Tue Nov 15 11, Brandon Gooch wrote:
> > On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
> > >
> > > hi there,
> > >
> > > one of the things i'm missing is an easy way to determine, whether a
> > stream or
> > > fd is seekable. i checked the dd(1) and h
On Tue, Nov 15, 2011 at 08:24:50PM +, Alexander Best wrote:
> one of the things i'm missing is an easy way to determine, whether a stream or
> fd is seekable. i checked the dd(1) and hd(1) sources and those tools are
> performing so much stuff just to find out if this is the case, and they stil
On Tue Nov 15 11, Brandon Gooch wrote:
> On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
> >
> > hi there,
> >
> > one of the things i'm missing is an easy way to determine, whether a
> stream or
> > fd is seekable. i checked the dd(1) and hd(1) sources and those tools are
> > performing so much
On Nov 15, 2011 2:25 PM, "Alexander Best" wrote:
>
> hi there,
>
> one of the things i'm missing is an easy way to determine, whether a
stream or
> fd is seekable. i checked the dd(1) and hd(1) sources and those tools are
> performing so much stuff just to find out if this is the case, and they
st
hi there,
one of the things i'm missing is an easy way to determine, whether a stream or
fd is seekable. i checked the dd(1) and hd(1) sources and those tools are
performing so much stuff just to find out if this is the case, and they still
are doing a very poor job.
dd(1) e.g. identifies /dev/ze
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