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cmd:isset [2011/04/08 18:48] mcb30 |
cmd:isset [2011/04/08 18:49] mcb30 |
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| ===== Notes ===== | ===== Notes ===== | ||
| - | The ''isset'' command relies upon the [[:settings]] expansion performed by all iPXE commands. The implementation of the ''isset'' command simply tests to see if it has a non-empty argument. | + | You should always consider what will happen if the value does not exist. For example: |
| - | + | ||
| - | You should always consider what will happen if the setting does not exist. For example: | + | |
| isset ${filename} && chain ${filename} | isset ${filename} && chain ${filename} | ||
