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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/pstree.remy/lib/utils.js | |
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api, login, auth
Diffstat (limited to 'node_modules/pstree.remy/lib/utils.js')
-rw-r--r-- | node_modules/pstree.remy/lib/utils.js | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/node_modules/pstree.remy/lib/utils.js b/node_modules/pstree.remy/lib/utils.js new file mode 100644 index 0000000..8fa5719 --- /dev/null +++ b/node_modules/pstree.remy/lib/utils.js @@ -0,0 +1,53 @@ +const spawn = require('child_process').spawn; + +module.exports = { tree, pidsForTree, getStat }; + +function getStat() { + return new Promise((resolve) => { + const command = `ls /proc | grep -E '^[0-9]+$' | xargs -I{} cat /proc/{}/stat`; + const spawned = spawn('sh', ['-c', command], { + stdio: ['pipe', 'pipe', 'pipe'], + }); + + var res = ''; + spawned.stdout.on('data', (data) => (res += data)); + spawned.on('close', () => resolve(res)); + }); +} + +function template(s) { + var stat = null; + // 'pid', 'comm', 'state', 'ppid', 'pgrp' + // %d (%s) %c %d %d + s.replace( + /(\d+) \((.*?)\)\s(.+?)\s(\d+)\s/g, + (all, PID, COMMAND, STAT, PPID) => { + stat = { PID, COMMAND, PPID, STAT }; + } + ); + + return stat; +} + +function tree(stats) { + const processes = stats.split('\n').map(template).filter(Boolean); + + return processes; +} + +function pidsForTree(tree, pid) { + if (typeof pid === 'number') { + pid = pid.toString(); + } + const parents = [pid]; + const pids = []; + + tree.forEach((proc) => { + if (parents.indexOf(proc.PPID) !== -1) { + parents.push(proc.PID); + pids.push(proc); + } + }); + + return pids; +} |