forked from lix-project/lix-website
129 lines
2.8 KiB
JavaScript
Executable file
129 lines
2.8 KiB
JavaScript
Executable file
#!/usr/bin/env node
|
|
|
|
'use strict';
|
|
|
|
var os = require('os');
|
|
var pidtree = require('..');
|
|
|
|
// The method startsWith is not defined on string objects in node 0.10
|
|
// eslint-disable-next-line no-extend-native
|
|
String.prototype.startsWith = function(suffix) {
|
|
return this.substring(0, suffix.length) === suffix;
|
|
};
|
|
|
|
function help() {
|
|
var help =
|
|
' Usage\n' +
|
|
' $ pidtree <ppid>\n' +
|
|
'\n' +
|
|
'Options\n' +
|
|
' --list To print the pids as a list.\n' +
|
|
'\n' +
|
|
'Examples\n' +
|
|
' $ pidtree\n' +
|
|
' $ pidtree --list\n' +
|
|
' $ pidtree 1\n' +
|
|
' $ pidtree 1 --list\n';
|
|
console.log(help);
|
|
}
|
|
|
|
function list(ppid) {
|
|
pidtree(ppid === undefined ? -1 : ppid, function(err, list) {
|
|
if (err) {
|
|
console.error(err.message);
|
|
return;
|
|
}
|
|
|
|
console.log(list.join(os.EOL));
|
|
});
|
|
}
|
|
|
|
function tree(ppid) {
|
|
pidtree(ppid, {advanced: true}, function(err, list) {
|
|
if (err) {
|
|
console.error(err.message);
|
|
return;
|
|
}
|
|
|
|
var parents = {}; // Hash Map of parents
|
|
var tree = {}; // Adiacency Hash Map
|
|
while (list.length > 0) {
|
|
var element = list.pop();
|
|
if (tree[element.ppid]) {
|
|
tree[element.ppid].push(element.pid);
|
|
} else {
|
|
tree[element.ppid] = [element.pid];
|
|
}
|
|
|
|
if (ppid === -1) {
|
|
parents[element.pid] = element.ppid;
|
|
}
|
|
}
|
|
|
|
var roots = [ppid];
|
|
if (ppid === -1) {
|
|
// Get all the roots
|
|
roots = Object.keys(tree).filter(function(node) {
|
|
return parents[node] === undefined;
|
|
});
|
|
}
|
|
|
|
roots.forEach(function(root) {
|
|
print(tree, root);
|
|
});
|
|
});
|
|
|
|
function print(tree, start) {
|
|
function printBranch(node, branch) {
|
|
var isGraphHead = branch.length === 0;
|
|
var children = tree[node] || [];
|
|
|
|
var branchHead = '';
|
|
if (!isGraphHead) {
|
|
branchHead = children.length > 0 ? '┬ ' : '─ ';
|
|
}
|
|
|
|
console.log(branch + branchHead + node);
|
|
|
|
var baseBranch = branch;
|
|
if (!isGraphHead) {
|
|
var isChildOfLastBranch = branch.slice(-2) === '└─';
|
|
baseBranch = branch.slice(0, -2) + (isChildOfLastBranch ? ' ' : '| ');
|
|
}
|
|
|
|
var nextBranch = baseBranch + '├─';
|
|
var lastBranch = baseBranch + '└─';
|
|
children.forEach(function(child, index) {
|
|
printBranch(
|
|
child,
|
|
children.length - 1 === index ? lastBranch : nextBranch
|
|
);
|
|
});
|
|
}
|
|
|
|
printBranch(start, '');
|
|
}
|
|
}
|
|
|
|
function run() {
|
|
var flag;
|
|
var ppid;
|
|
for (var i = 2; i < process.argv.length; i++) {
|
|
if (process.argv[i].startsWith('--')) {
|
|
flag = process.argv[i];
|
|
} else {
|
|
ppid = process.argv[i];
|
|
}
|
|
}
|
|
|
|
if (ppid === undefined) {
|
|
ppid = -1;
|
|
}
|
|
|
|
if (flag === '--list') list(ppid);
|
|
else if (flag === undefined) tree(ppid);
|
|
else help();
|
|
}
|
|
|
|
run();
|