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I want to get the value of name and put it in a variable using XMLLint
<body>
<value name="abc"></value>
</body>
echo 'cat //body/value/@name' | xmllint --shell "test.xml"
/ > -------
name="abc"
/ >
So I want to assign the value "abc" to variable $test
742
You need to use fn:string(), which will return the value of its argument as xs:string. In case its argument is an attribute, it will therefore return the attribute's value as xs:string.
test=$(xmllint --xpath "string(//body/value/@name)" test.xml)
Try this, it's not beautiful but it works :)
I just erase lines containing > from stdout , cut the string to get the second part after the = , and delete "
test=$(echo 'cat //body/value/@name' | xmllint --shell "test.xml" | grep -v ">" | cut -f 2 -d "=" | tr -d \");
echo $test
An approach with a helper awk command that supports multiple attributes (a streamlined version of ego's approach):
echo 'cat //*/@name' | xmllint --shell file | awk -F\" 'NR % 2 == 0 { print $2 }'
The awk command:
splits xmllint's output lines into fields by " chars. (-F\")
xmllint normalizes quoting around attribute values to "..." on output, even if the input had '...', so it's sufficient to split by ".only processes even-numbered lines (NR %2 == 0), thereby filtering out the separator lines that cat invariably prints.
print $2 then prints only the 2nd field, which is the value of each attribute without the enclosing "...".
Assuming the following sample XML in file:
<body>
<value name="abc"></value>
<value name="def"></value>
</body>
the above yields:
abc
def
I recently had to port my original simpler solution using --xpath to a platform lacking this feature, so had to adopt the "cat" solution too. This will handle multiple matches, tested on Ubuntu 12.04 and Solaris 11:
getxml() { # $1 = xml file, $2 = xpath expression
echo "cat $2" | xmllint --shell $1 |\
sed -n 's/[^\"]*\"\([^\"]*\)\"[^\"]*/\1/gp'
}
e.g. extracting instance names from a glassfish domain config:
$ getxml /tmp/test.xml "//server[@node-ref]/@name"
inst1
inst2
The sed post-processing just grabs all quoted values which was adequate for my needs (getting bits of glassfish config).
4
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