mirror of https://github.com/tLDP/LDP
56 lines
1.4 KiB
Bash
56 lines
1.4 KiB
Bash
#!/bin/bash
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# Functions and parameters
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DEFAULT=default # Default param value.
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func2 () {
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if [ -z "$1" ] # Is parameter #1 zero length?
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then
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echo "-Parameter #1 is zero length.-" # Or no parameter passed.
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else
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echo "-Parameter #1 is \"$1\".-"
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fi
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variable=${1-$DEFAULT} # What does
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echo "variable = $variable" #+ parameter substitution show?
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# ---------------------------
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# It distinguishes between
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#+ no param and a null param.
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if [ "$2" ]
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then
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echo "-Parameter #2 is \"$2\".-"
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fi
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return 0
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}
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echo
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echo "Nothing passed."
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func2 # Called with no params
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echo
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echo "Zero-length parameter passed."
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func2 "" # Called with zero-length param
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echo
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echo "Null parameter passed."
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func2 "$uninitialized_param" # Called with uninitialized param
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echo
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echo "One parameter passed."
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func2 first # Called with one param
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echo
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echo "Two parameters passed."
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func2 first second # Called with two params
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echo
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echo "\"\" \"second\" passed."
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func2 "" second # Called with zero-length first parameter
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echo # and ASCII string as a second one.
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exit 0
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