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Full Discussion: Korn shell behaviour in AIX
Top Forums Shell Programming and Scripting Korn shell behaviour in AIX Post 302728639 by rbatte1 on Thursday 8th of November 2012 08:00:09 AM
Old 11-08-2012
Yes, well I have it running on HP-UX with a file not found error then the "I am here" bit, but on AIX 6.1, AIX 5.1 (please don't laugh yet) and ...... AIX 4.3.3 Smilie I just get the file not found error and the script aborts.

I also inserted
Code:
 #!/bin/ksh

as the first line to be sure, but no change. I presume that this is suddenly a good reason to use cat!!!

If I write this in my natural style as
Code:
#!/bin/ksh
fun()
{
cat some_file_that_does_not_exist | while read x
do
echo $x
done 
}

fun
echo I am here

...it works fine on AIX too.


Can anyone explain the mismatch?


.... and here's me battling my instincts to avoid a useless use of cat such as cat $file | while code. Smilie



Robin
Liverpool/Blackburn
UK
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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