<div>
printenv is a csh builtin, and echo is an external command that will only see exported variables (ie: setenv)
</div>


printenv is a csh builtin, and echo is an external command that will only see exported variables (ie: setenv)

<div>
printenv takes variable name as parameter.<br />
<br />
&quot;printenv caller&quot; will display value for instance.
</div>


printenv takes variable name as parameter.

"printenv caller" will display value for instance.

<div>
It looks like first command sequence misses eol after last line...
</div>


It looks like first command sequence misses eol after last line...

<div>
<div class="content wysiwyg-content">
#!/bin/csh<br />
setenv caller &quot;enviroment1&quot;<br />
echo $caller<br />
setenv caller &quot;enviroment2&quot;<br />
echo $caller<br />
set caller=&quot;ordinary1&quot;<br />
echo $caller<br />
set caller=&quot;ordinary2&quot;<br />
echo $caller<br />
<br />
output is<br />
<br />
enviroment1<br />
enviroment2<br />
ordinary1<br />
<br />
<br />
But <br />
<br />
#!/bin/csh<br />
setenv caller &quot;enviroment1&quot;<br />
echo $caller<br />
setenv caller &quot;enviroment2&quot;<br />
echo $caller<br />
set caller=&quot;ordinary1&quot;<br />
echo $caller<br />
set caller=&quot;ordinary2&quot;<br />
echo $caller<br />
printenv $caller <br />
<br />
output is<br />
<br />
enviroment1<br />
enviroment2<br />
ordinary1<br />
ordinary2<br />
<br />
Why? <br />
<br />
thanks
</div>
</div>


#!/bin/csh
setenv caller "enviroment1"
echo $caller
setenv caller "enviroment2"
echo $caller
set caller="ordinary1"
echo $caller
set caller="ordinary2"
echo $caller

output is

enviroment1
enviroment2
ordinary1


But 

#!/bin/csh
setenv caller "enviroment1"
echo $caller
setenv caller "enviroment2"
echo $caller
set caller="ordinary1"
echo $caller
set caller="ordinary2"
echo $caller
printenv $caller 

output is

enviroment1
enviroment2
ordinary1
ordinary2

Why? 

thanks

C shell question

Unix is a multitasking, multi-user computer operating system originally developed in 1969 at Bell Labs. Today, it is a modern OS with many commercial flavors and licensees, including FreeBSD, Hewlett-Packard’s UX, IBM AIX and Apple Mac OS-X. Apart from its command-line interface, most UNIX variations support the standardized X Window System for GUIs, with the exception of the Mac OS, which uses a proprietary system.