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export
Время создания: 31.08.2017 20:51
Текстовые метки: knowledge
Раздел: bash - Variables
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Now run:


$ MYVAR=hello
$ ./myvar2.sh
MYVAR is:
MYVAR is: hi there


$ MYVAR=hello
$
./myvar2.sh
MYVAR is
:
MYVAR is
: hi there

It's still not been set! What's going on?! 
When you call 
myvar2.sh from your interactive shell, a new shell is spawned to run the script. This is partly because of the #!/bin/sh line at the start of the script, which we discussed earlier
We need to export the variable for it to be inherited by another program - including a shell script. Type:


$ export MYVAR
$ ./myvar2.sh
MYVAR is: hello
MYVAR is: hi there

$ export MYVAR
$
./myvar2.sh
MYVAR is
: hello
MYVAR is
: hi there

Так же в этом разделе:
 
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