<div>
while echo $jnickname | grep ' ' 
</div>


<div>
while [ -z $jnickname ] || [ echo $jnickname | grep ' ' ]; do<br />
cat /dev/null &gt;&nbsp;$tempfile<br />
&nbsp; &nbsp;dialog --title &quot;EvoPanel - getmuh v1.5&quot; \<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; --inputbox &quot;\nError: You cannot have a null nickname.\n\<br />
Please try again.\n&quot; 12 50 &quot;$jnickname&quot;<br />
&nbsp; &nbsp;jnickname=`cat $tempfile`<br />
<br />
done<br />
<br />
but it does not say anything .. it forks if i type: aa aa
</div>


while [ -z $jnickname ] || [ echo $jnickname | grep ' ' ]; do
cat /dev/null > $tempfile
   dialog --title "EvoPanel - getmuh v1.5" \
          --inputbox "\nError: You cannot have a null nickname.\n\
Please try again.\n" 12 50 "$jnickname"
   jnickname=`cat $tempfile`

done

but it does not say anything .. it forks if i type: aa aa

<div>
i was wrong, if i type aa aa it does not work, but if i tipe &lt;space&gt;&lt;space&gt;aa it works, or aa&lt;space&gt;&lt;space&gt;
</div>


i was wrong, if i type aa aa it does not work, but if i tipe <space><space>aa it works, or aa<space><space>

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<div class="content wysiwyg-content">
Hello, how can i repeat an dialog until &nbsp;there are no spaces in the word that is read from the dialog ?<br />
example:<br />
<br />
&nbsp; &nbsp;dialog --title &quot;EvoPanel - getmuh v1.5&quot; \<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; --inputbox &quot;\nWrite the nickname\n&quot; 13 50 &quot;$jnickname&quot;<br />
&nbsp; &nbsp;jnickname=`cat $tempfile`<br />
<br />
while -nickname has spaces in it-; do something<br />
<br />
so if i write &quot;&nbsp; &nbsp; blah&quot; the while will turn on and ask me again, until i remove the spaces
</div>
</div>


Hello, how can i repeat an dialog until  there are no spaces in the word that is read from the dialog ?
example:

   dialog --title "EvoPanel - getmuh v1.5" \
          --inputbox "\nWrite the nickname\n" 13 50 "$jnickname"
   jnickname=`cat $tempfile`

while -nickname has spaces in it-; do something

so if i write "    blah" the while will turn on and ask me again, until i remove the spaces

Bash - check for spaces

Kernel and system programming is the process of creating the software necessary for a computer or device to function and operate other programs. Some operating systems (such as Microsoft Windows) are proprietary, but others, such as the various Linux distributions, are open source.

System Programming

Kernel programming for Linux operating systems can be done with many different languages; C, C++, Python, Perl and Java, which are some of the most common languages used.There are also many different varieties of Linux, such as Ubuntu, Fedora and OpenSUSE.