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'use strict';
/* Read the contents of /proc/net/netstat, and transform the output into a JS object.
* Netstat contains sections of key/value pairs, for different metrics tracked by the
* Linux kernel. Sections are encoded as two lines, prefixed by the field name. The first
* line contains an ordered list of all key names. The second line contains the ordered
* list of values.
* The schema of resulting Javascript object is:
* {
* "section1": {
* "key1": value1,
* "key2": value2,
* ...
* },
* "section2": {
* "key1": value1,
* ...
* },
* ...
* }
*/
function getNetStatObj() {
return cat("/proc/net/netstat")
.split("\n")
.filter((item) => item.length)
.map(line => line.split(" "))
.reduce((acc, current) => {
const sectionName = current[0].slice(0, -1);
// If we're populating a subsection for the first time,
// just copy over the key names, resulting in:
// {..., "section": ["key1", "key2", ..., "keyN"] }
if (!acc[sectionName]) {
acc[sectionName] = current.slice(1);
} else {
// Merge the values into a subsection, resulting in:
// {..., "section": {"key1": value1, ..., "keyN", valueN} }
const populated = {};
acc[sectionName].forEach((item, index) => {
populated[item] = current[index + 1];
});
acc[sectionName] = populated;
}
return acc;
}, {});
}
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