Re: Ksh output garbled/out-of-sync

On May 10, 9:00 am, Janis <janis_papanag...@xxxxxxxxxxx> wrote:
On 10 Mai, 11:54, Bill Marcum <marcumb...@xxxxxxxxxxxxx> wrote:





On 9 May 2007 19:20:15 -0700, govindrjuj...@xxxxxxxxx

<govindrjuj...@xxxxxxxxx> wrote:

On May 9, 8:28 pm, govindrjuj...@xxxxxxxxx wrote:
Can somebody explain this ? -- thx

/tmp> cat ./1.sh
#!/bin/ksh

for name in 1 2 3 4 5 6 7 8 9 10
do
/bin/echo "<$name>"
/bin/cat /etc/passwd | head -1 | tail
done

/tmp> ./1.sh
<1>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<2>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<3>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<4>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<5>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<6>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<7>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<8>
<9>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh
<10>
root:x:0:1:HOSTNAME Super-User:/:/usr/bin/ksh

Looks like problem with "head". Happening on Solaris 5.8.

Try adding "wait" before "done". What version ofkshis this?
What happens if you use the builtin echo instead of /bin/echo?

--
Heard that the next Space Shuttle is supposed to carry several Guernsey cows?
It's gonna be the herd shot 'round the world.

And while experimenting; what's the result if you remove all
superfluous processs from

/bin/cat /etc/passwd | head -1 | tail

head -1 </etc/passwd

Does this also produce the disorderedoutput?

Janis- Hide quoted text -

- Show quoted text -


That suggestion worked. No more garbled output.

I ran the original script as-is on couple of more other systems with
Solaris 5.8. On some the output seems ok
and on some others, it gets unordered. I guess it varies with cpu
load. Whenever I am not able to reproduce the
problem, I just add few more "head -1" commands and the output gets
unordered.

I am leaning towards the possibilities that there is something wrong
with the configuration of our systems or
"head" is doing something mysterious with STDIN.





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