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Full Discussion: until command syntax error
Top Forums Shell Programming and Scripting until command syntax error Post 94754 by vgersh99 on Tuesday 3rd of January 2006 04:43:29 PM
Old 01-03-2006
Quote:
Originally Posted by 435 Gavea
Hi there.

I spent too much time away from Unix, now I can't remember how to issue a simple until command in ksh Smilie

could you tell me what is wrong with the following code sample:


export v = "1"
don't need the 'export'
loose the spaces around '='

Quote:
Originally Posted by 435 Gavea

until [ $v -lt 5 ]
well...... wouldn't the above always be 'true' if you start with 'v=1' ?
Quote:
Originally Posted by 435 Gavea
do
echo 'executing repeat_until'
v = `expr $v + 1`
done



I've already tried adding the semicolon to the end of the until line, in addition to a lot of other trials, but none of them made effect Smilie


Thanks for any help.
how 'bout:
Code:
#!/bin/ksh

typeset -i v=1

until (( v > 5 ))
do
  echo 'executing repeat_until'
  v=$(( v + 1 ))
done

 

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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 5.10 3 Aug 1994 echo(1B)
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