Re: [PATCH] Re: dd blocks/bytes at a time

[Matthew Woehlke]

Jim Meyering wrote:
> Matthew Woehlke <address@hidden> wrote:
> > Jim Meyering wrote:
> > > I see that both freebsd6 and netbsd1.6 disallow the usage in
> > > your test case:
> > >   netbsd$ echo x | /bin/dd bs=3 ibs=10 obs=10 conv=sync | wc -c
> > >   dd: ibs: illegal argument combination or already set
> > >   0
> > > Solaris 10 does what you propose.
> > > Can anyone check other implementations?
> > I can test oodles of systems (about six Unix flavors across almost a
> > dozen OS/HW combinations), but I'm not clear what you are looking for.
> > Should I just send the output from each system?
>
> Yep, just run this (assuming your vendor-provided dd is in /bin/dd):
>
>   echo x | /bin/dd bs=3 ibs=10 obs=10 conv=sync | wc -c

Ok:

==== Set 1
0+1 records in
1+0 records out
3
==== Set 2
0+1 records in
1+0 records out
10
==== PPC/Darwin 7.9.0
dd: ibs: illegal argument combination or already set
0
==== x86/Darwin 8.8.1
dd: bs supersedes ibs and obs
0+1 records in
1+0 records out
3 bytes transferred in 0.000039 secs (76725 bytes/sec)
3
====

Set 1 was:
 IRIS/IRIX 6.5
 Alpha/OSF 4.0F, 4.0G, 5.1
 SPARC/Solaris 5.6 - 5.10
 x86/Solaris 5.10
 PA-RISC/HP-UX 11.00, 11.11
 IA64/HP-UX 11.22
 PPC/AIX 5.3

Set 2 was various versions of coreutils on x86/Linux, IA64/Linux, and 
the infamous ;-) Tandem-NSK/OSS. Some example versions are 4.1, 4.5.3, 
5.97 and 6.6; coreutils has been doing it "wrong" since it was known as 
fileutils :-).

Some in Set 1 also had the '3 bytes transfered...' line, but I don't 
recall seeing any of the warnings ala x86/Darwin 8.8.1.

--
Matthew
We interrupt this e-mail to bring you a lame signature attempting to be 
witty.