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89 lines
2.7 KiB
JavaScript
89 lines
2.7 KiB
JavaScript
"use strict";
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const Promise = require("bluebird");
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const execBinary = require("../exec-binary");
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const parseIECBytes = require("../parse-bytes-iec");
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const parseMountOptions = require("../parse-mount-options");
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const createJsonParser = require("../text-parser-json");
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// TODO: Should we replace this with a read from /proc/mounts directly?
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// Ref. https://unix.stackexchange.com/a/18067
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function mapMountList(mounts) {
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return mounts.map((mount) => {
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// Some poorly-documented pseudo-filesystems were not worth investigating mount options for, yet. For those, we silently ignore missing/unknown entries.
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// TODO: FUSE should eventually be removed from this list
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let missingOptionsAllowed = ["cgroup", "cgroup2", "bpf", "pstore", "fuse"].includes(mount.fstype);
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let parsedOptions = parseMountOptions(mount.fstype, mount.options);
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// For dealing with bind mounts, which have a path suffix, like eg.:
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// /dev/disk/by-uuid/692937db-d74c-4110-b55b-41a20f1b9342[/nix/store]
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let cleanSourceDevice = (mount.source.startsWith("/"))
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? mount.source.replace(/\[.+$/, "")
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: null; // Pseudo-filesystems
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if (missingOptionsAllowed || parsedOptions.missing.length === 0) {
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return {
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id: mount.id,
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sourceDevice: cleanSourceDevice,
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isBindMount: (cleanSourceDevice != null)
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? mount.source.includes("[") // FIXME: Is this actually correct? Can a square bracket ever appear in a device path legitimately?
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: false, // Pseudo-filesystems
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mountpoint: mount.target,
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filesystem: mount.fstype,
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options: parsedOptions.parsed,
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label: mount.label,
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uuid: mount.uuid,
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partitionLabel: mount.partlabel,
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partitionUUID: mount.partuuid,
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deviceNumber: mount["maj:min"],
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totalSpace: parseIECBytes(mount.size),
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freeSpace: parseIECBytes(mount.avail),
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usedSpace: parseIECBytes(mount.used),
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rootPath: mount.fsroot,
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taskID: mount.tid,
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optionalFields: mount["opt-fields"],
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propagationFlags: mount.propagation,
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children: (mount.children != null) ? mapMountList(mount.children) : []
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};
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} else {
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throw new Error(`Encountered unrecognized mount options for mount '${mount.target}': ${parsedOptions.missing.join(", ")}`);
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}
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});
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}
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let columns = [
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"SOURCE",
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"TARGET",
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"FSTYPE",
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"OPTIONS",
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"LABEL",
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"UUID",
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"PARTLABEL",
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"PARTUUID",
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"MAJ:MIN",
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"SIZE",
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"AVAIL",
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"USED",
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"FSROOT",
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"TID",
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"ID",
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"OPT-FIELDS",
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"PROPAGATION"
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];
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module.exports = function findmnt() {
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return Promise.try(() => {
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return execBinary("findmnt")
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.withFlags({
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json: true,
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o: columns.join(",")
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})
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.requireOnStdout(createJsonParser())
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.execute();
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}).then((output) => {
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return mapMountList(output.result.filesystems);
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});
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};
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