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NetMesh/electron/bridges/sshBridge/sessionOps.serverStats.test.cjs

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[Init] Initial commit - NetMesh terminal manager
2026-09-13 18:24:01 +08:00
const test = require("node:test");
const assert = require("node:assert/strict");
const { spawnSync } = require("node:child_process");
const { EventEmitter } = require("node:events");
const { createSessionOpsApi } = require("./sessionOps.cjs");
function quoteShellArg(value) {
return "'" + String(value).replace(/'/g, "'\\''") + "'";
}
function unwrapExecShC(command) {
const prefix = "exec sh -c ";
if (!String(command).startsWith(prefix)) return command;
const quoted = command.slice(prefix.length);
if (!quoted.startsWith("'") || !quoted.endsWith("'")) return command;
return quoted.slice(1, -1).replace(/'\\''/g, "'");
}
const { selectServerStatsFixtureOutput } = require("./serverStatsTestHelpers.cjs");
const {
borrowTransport,
createTransport,
findTransportByEndpoint,
getTransportStats,
resetSshTransportRegistryForTests,
} = require("../sshConnectionPool.cjs");
// A fake ssh2 exec stream that emits the canned stdout then closes.
function fakeStream(stdout) {
const stream = new EventEmitter();
stream.stderr = new EventEmitter();
let sent = false;
const send = () => {
if (sent) return;
sent = true;
if (stdout) stream.emit("data", Buffer.from(stdout));
stream.emit("close", 0);
};
stream.write = () => true;
setImmediate(send);
return stream;
}
// A fake connection whose exec() always returns the same canned Linux stats
// line so getServerStats parses a successful result.
function fakeConn(stdout) {
return {
exec(command, cb) {
cb(null, fakeStream(selectServerStatsFixtureOutput(command, stdout)));
},
};
}
// Minimal Linux stats payload: enough for the parser to report success
// (memTotal present). CPU needs two samples for a delta, which is fine — the
// success gate only requires cpu OR memTotal OR cpuCores to be non-null.
const LINUX_STATS =
"CPURAW:1000 900|CORES:4|PERCORERAW:|MEMINFO:8000 4000 100 900 0 0|PROCS:|DISKS:|NET:";
const MACOS_STATS =
"NC_LATENCY_MARK|CPU:27|CORES:10|MEMINFO:32768 4096 0 8192 2048 1536|PROCS:123;1.2;Finder|DISKS:/:120:460:26:apfs:/dev/disk3|NET:en0:1000:3000";
function makeSessionOps(sessions) {
return createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
measureTcpConnectLatency: async () => 3,
// The rest of the sessionOps surface isn't exercised by getServerStats.
});
}
function runStatsCommandWithBusyBoxTools(command) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 4; }",
"ps() { return 1; }",
"top() {",
" printf '%s\\n' 'Mem: 256000K used, 768000K free, 0K shrd, 0K buff, 0K cached'",
" printf '%s\\n' 'CPU: 0% usr 0% sys 0% nic 100% idle 0% io 0% irq 0% sirq'",
" printf '%s\\n' ' PID PPID USER STAT VSZ %VSZ %CPU COMMAND'",
" printf '%s\\n' ' 1 0 root S 2048 2% 3% /sbin/procd'",
"}",
"mount() { return 1; }",
"df() {",
" if [ \"$1\" = '-kPT' ]; then return 1; fi",
" if [ \"$1\" = '-BG' ]; then return 1; fi",
" printf '%s\\n' 'Filesystem 1024-blocks Used Available Capacity Mounted on'",
" printf '%s\\n' 'overlayfs:/overlay 1048576 262144 786432 25% /'",
" printf '%s\\n' '/dev/loop0 131072 131072 0 100% /snap/example/1'",
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
function runStatsCommandWithBusyBoxSmpTop(command) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 4; }",
"ps() { return 1; }",
"top() {",
" printf '%s\\n' 'Mem: 256000K used, 768000K free, 0K shrd, 0K buff, 0K cached'",
" printf '%s\\n' 'CPU: 0% usr 0% sys 0% nic 100% idle 0% io 0% irq 0% sirq'",
" printf '%s\\n' ' PID PPID USER STAT VSZ %VSZ CPU %CPU COMMAND'",
" printf '%s\\n' ' 1 0 root S 2048 2.0 0 3.0 /sbin/procd sh -c echo a,b|c'",
"}",
"df() { return 1; }",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
// Proxmox LXC (CT) guests often expose ZFS datasets / host bind mounts as the
// df "Filesystem" column instead of /dev/* block devices.
function runStatsCommandWithPveCtDf(command) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 2; }",
"ps() { return 1; }",
"top() { return 1; }",
"mount() { return 1; }",
"df() {",
" path=",
" for a in \"$@\"; do",
" case \"$a\" in /*) path=$a ;; esac",
" done",
" if [ \"$1\" = '-kPT' ]; then",
" printf '%s\\n' 'Filesystem Type 1024-blocks Used Available Capacity Mounted on'",
" if [ -n \"$path\" ]; then",
" printf '%s\\n' 'rpool/data/subvol-101-disk-0 zfs 8388608 1048576 7340032 13% /'",
" return 0",
" fi",
" printf '%s\\n' 'rpool/data/subvol-101-disk-0 zfs 8388608 1048576 7340032 13% /'",
" printf '%s\\n' 'rpool/data/subvol-101-disk-1 zfs 20971520 5242880 15728640 25% /mnt/data'",
" printf '%s\\n' '/tank/shared ext4 104857600 52428800 52428800 50% /srv'",
" printf '%s\\n' 'tmpfs tmpfs 102400 100 102300 1% /run'",
" printf '%s\\n' 'udev devtmpfs 1024652 0 1024652 0% /dev'",
" printf '%s\\n' '/dev/loop0 squashfs 131072 131072 0 100% /snap/example/1'",
" printf '%s\\n' 'rpool/data/subvol-101-disk-2 zfs 4194304 1048576 3145728 - /mnt/scratch'",
" return 0",
" fi",
" printf '%s\\n' 'Filesystem 1024-blocks Used Available Capacity Mounted on'",
" if [ -n \"$path\" ]; then",
" printf '%s\\n' 'rpool/data/subvol-101-disk-0 8388608 1048576 7340032 13% /'",
" return 0",
" fi",
" printf '%s\\n' 'rpool/data/subvol-101-disk-0 8388608 1048576 7340032 13% /'",
" printf '%s\\n' 'rpool/data/subvol-101-disk-1 20971520 5242880 15728640 25% /mnt/data'",
" printf '%s\\n' '/tank/shared 104857600 52428800 52428800 50% /srv'",
" printf '%s\\n' 'tmpfs 102400 100 102300 1% /run'",
" printf '%s\\n' 'udev 1024652 0 1024652 0% /dev'",
" printf '%s\\n' '/dev/loop0 131072 131072 0 100% /snap/example/1'",
" printf '%s\\n' 'rpool/data/subvol-101-disk-2 4194304 1048576 3145728 - /mnt/scratch'",
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
test("getServerStats falls back to BusyBox tools and excludes loop-backed images", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "router.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithBusyBoxTools(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.topProcesses, [
{ pid: "1", memPercent: 2, command: "/sbin/procd" },
]);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 0.25, total: 1, percent: 25, capacityKey: "overlayfs:/overlay" },
]);
assert.equal(result.stats.diskPercent, 25);
});
test("getServerStats keeps PVE CT ZFS/bind mounts and recovers dash Capacity", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "ct.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithPveCtDf(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 1, total: 8, percent: 13, capacityKey: "rpool/data/subvol-101-disk-0", filesystemType: "zfs" },
{ mountPoint: "/mnt/data", used: 5, total: 20, percent: 25, capacityKey: "rpool/data/subvol-101-disk-1", filesystemType: "zfs" },
{ mountPoint: "/srv", used: 50, total: 100, percent: 50, capacityKey: "/tank/shared", filesystemType: "ext4" },
{ mountPoint: "/mnt/scratch", used: 1, total: 4, percent: 25, capacityKey: "rpool/data/subvol-101-disk-2", filesystemType: "zfs" },
]);
assert.equal(result.stats.diskPercent, 13);
assert.equal(result.stats.diskUsed, 1);
assert.equal(result.stats.diskTotal, 8);
});
// rclone / CloudDrive / union-style FUSE mounts expose cloud quotas that should
// not inflate System Overview disk totals after the PVE CT filter broadening.
function runStatsCommandWithNetworkFuseDf(command, { forceLegacy = false } = {}) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 2; }",
"ps() { return 1; }",
"top() { return 1; }",
"mount() {",
" printf '%s\\n' 'remote:gdrive on /mnt/rclone type fuse.rclone (rw)'",
" printf '%s\\n' 'remote:gdrive on /mnt/gdrive type fuse.rclone (rw)'",
" printf '%s\\n' 'user@host:/media on /mnt/sshfs type fuse.sshfs (rw)'",
" printf '%s\\n' 'CloudNAS on /CloudNAS type fuse.CloudDrive (rw)'",
" printf '%s\\n' 'ufs-backend on /mnt/ufs type fuse.ufs (rw)'",
" printf '%s\\n' 'nas.local:/volume1/media on /mnt/nas type nfs4 (rw)'",
" printf '%s\\n' '//nas.local/share on /mnt/smb type cifs (rw)'",
" printf '%s\\n' 'mergerfs on /mnt/pool type fuse.mergerfs (rw)'",
" printf '%s\\n' 'gluster on /mnt/gluster type fuse.glusterfs (rw)'",
" printf '%s\\n' 'ceph-fuse on /mnt/ceph type fuse.ceph-fuse (rw)'",
" printf '%s\\n' 'unionfs on /mnt/unionfs type fuse.unionfs-fuse (rw)'",
" printf '%s\\n' 'CloudFS on /mnt/CloudNAS/openlist type fuse (rw)'",
"}",
"df() {",
...(forceLegacy ? [" if [ \"$1\" = '-kPT' ]; then return 1; fi"] : []),
" path=",
" for a in \"$@\"; do",
" case \"$a\" in /*) path=$a ;; esac",
" done",
" if [ \"$1\" = '-kPT' ]; then",
" printf '%s\\n' 'Filesystem Type 1024-blocks Used Available Capacity Mounted on'",
" if [ -n \"$path\" ]; then",
" printf '%s\\n' '/dev/sda1 ext4 104857600 20971520 83886080 20% /'",
" return 0",
" fi",
" printf '%s\\n' '/dev/sda1 ext4 104857600 20971520 83886080 20% /'",
" printf '%s\\n' '/dev/sdb1 ext4 52428800 10485760 41943040 20% /data'",
" printf '%s\\n' 'remote:gdrive fuse.rclone 1073741824 536870912 536870912 50% /mnt/rclone'",
" printf '%s\\n' 'user@host:/media fuse.sshfs 2147483648 1073741824 1073741824 50% /mnt/sshfs'",
" printf '%s\\n' 'CloudNAS fuse.CloudDrive 4294967296 2147483648 2147483648 50% /CloudNAS'",
" printf '%s\\n' 'ufs-backend fuse.ufs 1048576000 524288000 524288000 50% /mnt/ufs'",
" printf '%s\\n' 'nas.local:/volume1/media nfs4 20971520000 8388608000 12582912000 40% /mnt/nas'",
" printf '%s\\n' '//nas.local/share cifs 10485760000 4194304000 6291456000 40% /mnt/smb'",
" printf '%s\\n' 'mergerfs fuse.mergerfs 31457280000 9437184000 22020096000 30% /mnt/pool'",
" printf '%s\\n' 'gluster fuse.glusterfs 15728640000 7340032000 8388608000 47% /mnt/gluster'",
" printf '%s\\n' 'ceph-fuse fuse.ceph-fuse 12582912000 6291456000 6291456000 50% /mnt/ceph'",
" printf '%s\\n' 'unionfs fuse.unionfs-fuse 8388608000 2097152000 6291456000 25% /mnt/unionfs'",
" printf '%s\\n' 'CloudFS fuse 10995116277760 0 10995116277760 0% /mnt/CloudNAS/openlist'",
" printf '%s\\n' 'tmpfs tmpfs 102400 100 102300 1% /run'",
" return 0",
" fi",
" printf '%s\\n' 'Filesystem 1024-blocks Used Available Capacity Mounted on'",
" if [ -n \"$path\" ]; then",
" printf '%s\\n' '/dev/sda1 104857600 20971520 83886080 20% /'",
" return 0",
" fi",
" printf '%s\\n' '/dev/sda1 104857600 20971520 83886080 20% /'",
" printf '%s\\n' '/dev/sdb1 52428800 10485760 41943040 20% /data'",
" printf '%s\\n' 'fuse.rclone 1073741824 536870912 536870912 50% /mnt/rclone'",
" printf '%s\\n' 'remote:gdrive:media 2147483648 1073741824 1073741824 50% /mnt/gdrive'",
" printf '%s\\n' 'user@host:/media 2147483648 1073741824 1073741824 50% /mnt/sshfs'",
" printf '%s\\n' 'CloudDrive 4294967296 2147483648 2147483648 50% /CloudNAS/CloudDrive'",
" printf '%s\\n' 'ufs 1048576000 524288000 524288000 50% /mnt/ufs'",
" printf '%s\\n' 'nas.local:/volume1/media 20971520000 8388608000 12582912000 40% /mnt/nas'",
" printf '%s\\n' '//nas.local/share 10485760000 4194304000 6291456000 40% /mnt/smb'",
" printf '%s\\n' 'mergerfs 31457280000 9437184000 22020096000 30% /mnt/pool'",
" printf '%s\\n' 'gluster 15728640000 7340032000 8388608000 47% /mnt/gluster'",
" printf '%s\\n' 'ceph-fuse 12582912000 6291456000 6291456000 50% /mnt/ceph'",
" printf '%s\\n' 'unionfs 8388608000 2097152000 6291456000 25% /mnt/unionfs'",
" printf '%s\\n' 'tmpfs 102400 100 102300 1% /run'",
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
function runStatsCommandWithRootFuseDf(command, filesystemType = "fuse.rclone") {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 2; }",
"ps() { return 1; }",
"top() { return 1; }",
"mount() { return 1; }",
"df() {",
" if [ \"$1\" != '-kPT' ]; then return 1; fi",
" printf '%s\\n' 'Filesystem Type 1024-blocks Used Available Capacity Mounted on'",
` printf '%s\\n' 'remote:gdrive ${filesystemType} 1073741824 536870912 536870912 50% /'`,
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
test("getServerStats excludes FUSE mounts using df filesystem types", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "nas.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithNetworkFuseDf(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 20, total: 100, percent: 20, capacityKey: "/dev/sda1", filesystemType: "ext4" },
{ mountPoint: "/data", used: 10, total: 50, percent: 20, capacityKey: "/dev/sdb1", filesystemType: "ext4" },
]);
assert.equal(result.stats.diskPercent, 20);
assert.equal(result.stats.diskUsed, 20);
assert.equal(result.stats.diskTotal, 100);
});
test("getServerStats uses mount metadata when df filesystem types are unavailable", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "legacy-fuse.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithNetworkFuseDf(command, { forceLegacy: true });
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 20, total: 100, percent: 20, capacityKey: "/dev/sda1" },
{ mountPoint: "/data", used: 10, total: 50, percent: 20, capacityKey: "/dev/sdb1" },
]);
assert.equal(result.stats.diskPercent, 20);
assert.equal(result.stats.diskUsed, 20);
assert.equal(result.stats.diskTotal, 100);
});
function runStatsCommandWithUntypedScopedIpv6NfsDf(command) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 2; }",
"ps() { return 1; }",
"top() { return 1; }",
"mount() { return 1; }",
"df() {",
" if [ \"$1\" = '-kPT' ]; then return 1; fi",
" printf '%s\\n' 'Filesystem 1024-blocks Used Available Capacity Mounted on'",
" printf '%s\\n' '/dev/sda1 104857600 20971520 83886080 20% /'",
" printf '%s\\n' '[fe80::1%eth0]:/export 20971520000 8388608000 12582912000 40% /mnt/nfs6'",
" printf '%s\\n' 'ceph-fuse 12582912000 6291456000 6291456000 50% /mnt/ceph'",
" printf '%s\\n' 'gluster 15728640000 7340032000 8388608000 47% /mnt/gluster'",
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
test("getServerStats excludes scoped IPv6 NFS sources without filesystem types", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "nfs6.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithUntypedScopedIpv6NfsDf(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 20, total: 100, percent: 20, capacityKey: "/dev/sda1" },
]);
assert.equal(result.stats.diskPercent, 20);
assert.equal(result.stats.diskUsed, 20);
assert.equal(result.stats.diskTotal, 100);
});
test("getServerStats does not fall back to a root FUSE quota", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "fuse-root.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithRootFuseDf(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, []);
assert.equal(result.stats.diskPercent, null);
assert.equal(result.stats.diskUsed, null);
assert.equal(result.stats.diskTotal, null);
});
test("getServerStats keeps a local fuseblk root filesystem", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "ntfs-root.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithRootFuseDf(command, "fuseblk");
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 512, total: 1024, percent: 50, capacityKey: "remote:gdrive", filesystemType: "fuseblk" },
]);
assert.equal(result.stats.diskPercent, 50);
assert.equal(result.stats.diskUsed, 512);
assert.equal(result.stats.diskTotal, 1024);
});
function runStatsCommandWithLoopRootDf(command) {
command = unwrapExecShC(command);
const script = [
"uname() { printf '%s\\n' Linux; }",
"nproc() { printf '%s\\n' 2; }",
"ps() { return 1; }",
"top() { return 1; }",
"mount() { return 1; }",
"df() {",
" if [ \"$1\" != '-kPT' ]; then return 1; fi",
" printf '%s\\n' 'Filesystem Type 1024-blocks Used Available Capacity Mounted on'",
" printf '%s\\n' '/dev/loop0 ext4 8388608 2097152 6291456 25% /'",
" printf '%s\\n' '/dev/loop1 squashfs 131072 131072 0 100% /snap/example/1'",
"}",
command,
].join("\n");
return spawnSync("sh", ["-c", script], { encoding: "utf8" });
}
test("getServerStats keeps a loop-backed root while skipping snap loops", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "ct-loop.example.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithLoopRootDf(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 2, total: 8, percent: 25, capacityKey: "/dev/loop0", filesystemType: "ext4" },
]);
assert.equal(result.stats.diskPercent, 25);
assert.equal(result.stats.diskUsed, 2);
assert.equal(result.stats.diskTotal, 8);
});
test("getServerStats reads commands after BusyBox top's CPU column", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "router.test", port: 22 },
conn: {
exec(command, cb) {
const execution = runStatsCommandWithBusyBoxSmpTop(command);
assert.equal(execution.status, 0, execution.stderr);
cb(null, fakeStream(execution.stdout));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.topProcesses, [
{ pid: "1", memPercent: 2, command: "/sbin/procd" },
]);
});
test("getServerStats opens a Mosh stats companion connection when session.conn is missing", async () => {
const sessions = new Map();
const session = { type: "mosh", moshStatsAuth: { hostname: "h", password: "p" } };
sessions.set("sid", session);
let ensureCalls = 0;
const api = createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
ensureMoshStatsConnection: async (s, id) => {
ensureCalls += 1;
assert.equal(s, session);
assert.equal(id, "sid");
// Simulate a successful companion connection. The real helper stores it
// on moshStatsConn (NOT conn) so it stays invisible to other bridges.
s.moshStatsConn = fakeConn(LINUX_STATS);
return s.moshStatsConn;
},
measureTcpConnectLatency: async () => 3,
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(ensureCalls, 1);
// session.conn must remain unset — only moshStatsConn carries the companion.
assert.equal(session.conn, undefined);
assert.equal(result.success, true);
assert.equal(result.stats.memTotal, 8000);
assert.equal(result.stats.cpuCores, 4);
assert.equal(typeof result.stats.latencyMs, "number");
});
test("getServerStats fails gracefully when the companion connection cannot be established", async () => {
const sessions = new Map();
const session = { type: "mosh", moshStatsAuth: { hostname: "h" } };
sessions.set("sid", session);
const api = createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
ensureMoshStatsConnection: async () => null, // no usable auth, etc.
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, false);
assert.match(result.error, /not connected/);
});
test("getServerStats does not touch the companion path for a normal SSH session", async () => {
const sessions = new Map();
const session = { type: "ssh", conn: fakeConn(LINUX_STATS) };
sessions.set("sid", session);
let ensureCalls = 0;
const api = createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
ensureMoshStatsConnection: async () => {
ensureCalls += 1;
return null;
},
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(ensureCalls, 0);
assert.equal(result.success, true);
});
test("getServerStats measures TCP connectivity instead of SSH protocol latency", async () => {
const sessions = new Map();
const session = {
type: "mosh",
hostname: "vm.example.test",
moshStatsAuth: { hostname: "vm.example.test", port: 2222 },
moshStatsConn: fakeConn(LINUX_STATS),
};
sessions.set("sid", session);
const probes = [];
const api = createSessionOpsApi({
sessions,
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
measureTcpConnectLatency: async (target) => {
probes.push(target);
return 2;
},
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(result.stats.latencyMs, 2);
assert.deepEqual(probes, [{ hostname: "vm.example.test", port: 2222 }]);
});
test("getServerStats skips a misleading direct probe for jump-host sessions", async () => {
const sessions = new Map([["sid", {
type: "mosh",
moshStatsAuth: { hostname: "private.example.test", port: 22, hasJumpHost: true },
moshStatsConn: fakeConn(LINUX_STATS),
}]]);
let probeCalls = 0;
const api = createSessionOpsApi({
sessions,
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
measureTcpConnectLatency: async () => {
probeCalls += 1;
return 2;
},
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(result.stats.latencyMs, null);
assert.equal(probeCalls, 0);
});
test("getServerStats closes a blocked probe channel when stats time out", async () => {
let fireTimeout;
let closeCalls = 0;
const stream = new EventEmitter();
stream.stderr = new EventEmitter();
stream.write = () => true;
stream.close = () => { closeCalls += 1; };
const api = createSessionOpsApi({
sessions: new Map([["sid", { type: "ssh", conn: { exec: (_command, cb) => cb(null, stream) } }]]),
Date,
setTimeout: (callback) => {
fireTimeout = callback;
return 1;
},
clearTimeout: () => {},
Buffer,
quoteShellArg,
});
const pending = api.getServerStats({ sender: {} }, { sessionId: "sid" });
fireTimeout();
const result = await pending;
assert.equal(result.success, false);
assert.match(result.error, /Timeout/);
assert.equal(closeCalls, 1);
});
test("getServerStats closes a stats stream delivered after timeout", async () => {
let execCallback;
let fireTimeout;
let closeCalls = 0;
const api = createSessionOpsApi({
sessions: new Map([["sid", {
type: "ssh",
conn: { exec: (_command, callback) => { execCallback = callback; } },
}]]),
Date,
setTimeout: (callback) => {
fireTimeout = callback;
return 1;
},
clearTimeout: () => {},
Buffer,
quoteShellArg,
});
const pending = api.getServerStats({ sender: {} }, { sessionId: "sid" });
fireTimeout();
const result = await pending;
const lateStream = new EventEmitter();
lateStream.stderr = new EventEmitter();
lateStream.close = () => { closeCalls += 1; };
execCallback(null, lateStream);
assert.equal(result.success, false);
assert.equal(closeCalls, 1);
});
test("three stats retries on an unresponsive exec open leave no pooled transport or channel callbacks", async () => {
resetSshTransportRegistryForTests({ defaultIdleTtlMs: 0 });
const endpoint = { hostId: "stats-host", hostname: "wedged.example", username: "root" };
const conn = new EventEmitter();
conn._sock = { destroyed: false };
conn.pendingChannelCallbacks = [];
conn.exec = (_command, callback) => {
if (conn._sock.destroyed) throw new Error("Not connected");
conn.pendingChannelCallbacks.push(callback);
};
conn.end = () => {};
conn.destroy = () => {
if (conn._sock.destroyed) return;
conn._sock.destroyed = true;
conn.pendingChannelCallbacks.length = 0;
conn.emit("close");
};
const transport = createTransport({ conn, endpoint });
borrowTransport(transport, { kind: "shell", holder: {} });
const timers = [];
const api = createSessionOpsApi({
sessions: new Map([["sid", { type: "ssh", conn }]]),
Date,
setTimeout: (callback) => {
const timer = { callback, cleared: false, unref() {} };
timers.push(timer);
return timer;
},
clearTimeout: (timer) => { if (timer) timer.cleared = true; },
Buffer,
quoteShellArg,
});
const first = api.getServerStats({ sender: {} }, { sessionId: "sid" });
const openingTimer = timers.find((timer) => !timer.cleared);
assert.ok(openingTimer);
openingTimer.callback();
const results = [await first];
results.push(await api.getServerStats({ sender: {} }, { sessionId: "sid" }));
results.push(await api.getServerStats({ sender: {} }, { sessionId: "sid" }));
assert.ok(results.every((result) => result.success === false));
assert.equal(conn.pendingChannelCallbacks.length, 0);
assert.equal(getTransportStats().transports, 0);
assert.equal(findTransportByEndpoint(endpoint), null);
const replacement = new EventEmitter();
replacement._sock = { destroyed: false };
replacement.end = () => {};
const replacementTransport = createTransport({ conn: replacement, endpoint });
assert.equal(findTransportByEndpoint(endpoint), replacementTransport);
resetSshTransportRegistryForTests({ defaultIdleTtlMs: 0 });
});
test("getServerStats includes host identity, load average, and uptime", async () => {
const sessions = new Map();
const session = {
type: "ssh",
conn: fakeConn(
"CPURAW:1000 900|CORES:4|PERCORERAW:|MEMINFO:8000 4000 100 900 0 0|PROCS:|DISKS:/:20:80:25|NET:eth0:1000:2000|HOST:demo-box|OS:Ubuntu 24.04 LTS|KERNEL:6.8.0|UPTIME:12345|LOAD:0.10 0.20 0.30",
),
};
sessions.set("sid", session);
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(result.stats.hostname, "demo-box");
assert.equal(result.stats.osName, "Ubuntu 24.04 LTS");
assert.equal(result.stats.kernelRelease, "6.8.0");
assert.equal(result.stats.uptimeSeconds, 12345);
assert.deepEqual(result.stats.loadAverage, [0.1, 0.2, 0.3]);
});
test("getServerStats derives disk percent when the Capacity field is non-numeric", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
conn: fakeConn(
"CPURAW:1000 900|CORES:4|PERCORERAW:|MEMINFO:8000 4000 100 900 0 0|PROCS:|DISKS:/:1:8:-:rpool/data/subvol-101-disk-0|NET:",
),
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.deepEqual(result.stats.disks, [
{ mountPoint: "/", used: 1, total: 8, percent: 13, capacityKey: "rpool/data/subvol-101-disk-0" },
]);
assert.equal(result.stats.diskPercent, 13);
});
test("getServerStats keeps blank load average and uptime as missing data", async () => {
const sessions = new Map();
const session = {
type: "ssh",
conn: fakeConn(
"CPURAW:1000 900|CORES:4|PERCORERAW:|MEMINFO:8000 4000 100 900 0 0|PROCS:|DISKS:|NET:|UPTIME:|LOAD:",
),
};
sessions.set("sid", session);
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(result.stats.uptimeSeconds, null);
assert.deepEqual(result.stats.loadAverage, []);
});
test("getServerStats parses macOS stats and avoids blocking top command", async () => {
const sessions = new Map();
let command = "";
const session = {
type: "ssh",
_reuseEndpoint: { hostname: "mac.example.test", port: 22 },
conn: {
exec(cmd, cb) {
command = cmd;
cb(null, fakeStream(MACOS_STATS));
},
},
};
sessions.set("sid", session);
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.match(command, /Darwin/);
assert.match(command, /ps -A -o %cpu=/);
assert.match(command, /awk -v c="\$cores"/);
assert.match(command, /s=s\/c/);
assert.match(command, /u=\(\$2-\$4\)\/1048576/);
assert.doesNotMatch(command, /top -l/);
assert.equal(result.stats.cpu, 27);
assert.equal(result.stats.cpuCores, 10);
assert.equal(result.stats.memTotal, 32768);
assert.equal(result.stats.memUsed, 20480);
assert.equal(result.stats.diskPercent, 26);
assert.equal(result.stats.disks[0].capacityKey, "apfs:/dev/disk3");
assert.equal(result.stats.netInterfaces.length, 1);
assert.equal(result.stats.netInterfaces[0].name, "en0");
assert.equal(result.stats.netInterfaces[0].rxBytes, 1000);
assert.equal(result.stats.netInterfaces[0].txBytes, 3000);
assert.equal(typeof result.stats.latencyMs, "number");
});
test("getServerStats keeps every remote command within Dropbear's command limit", async () => {
const commands = [];
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "openwrt.example.test", port: 22 },
conn: {
exec(command, cb) {
commands.push(command);
const output = command.includes("CPURAW:")
? `NC_LATENCY_MARK|${LINUX_STATS}`
: command.includes("DISKS:")
? "DISKS:"
: "";
cb(null, fakeStream(output));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(commands.length, 2, "Linux base and disk stats must use separate commands");
for (const command of commands) {
assert.ok(
Buffer.byteLength(command, "utf8") <= 9000,
`remote command is ${Buffer.byteLength(command, "utf8")} bytes`,
);
}
});
test("getServerStats settles when the split disk command fails", async () => {
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
conn: {
exec(command, cb) {
if (command.includes('echo "DISKS:$disks"')) {
cb(new Error("disk stats rejected"));
return;
}
cb(null, fakeStream(`NC_LATENCY_MARK|${LINUX_STATS}`));
},
},
});
const api = makeSessionOps(sessions);
const result = await Promise.race([
api.getServerStats({ sender: {} }, { sessionId: "sid" }),
new Promise((resolve) => setTimeout(() => resolve({ timedOut: true }), 100)),
]);
assert.notEqual(result.timedOut, true);
assert.equal(result.success, false);
assert.equal(result.error, "disk stats rejected");
});
test("getServerStats reports pending (not a hard failure) for a Mosh session before the handshake swap", async () => {
const sessions = new Map();
// Connected (renderer polls) but moshStatsAuth not yet assigned.
const session = { type: "mosh" };
sessions.set("sid", session);
let ensureCalls = 0;
const api = createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
ensureMoshStatsConnection: async () => {
ensureCalls += 1;
return null; // nothing to connect with yet
},
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(ensureCalls, 1);
assert.equal(result.success, false);
// pending must be set so the renderer doesn't count this toward give-up.
assert.equal(result.pending, true);
});
test("getServerStats reports a hard failure (not pending) once the companion permanently failed", async () => {
const sessions = new Map();
// moshStatsAuth present but the companion has permanently failed (e.g. auth
// rejected) — this is a real failure, the renderer should be allowed to give
// up.
const session = { type: "mosh", moshStatsAuth: { hostname: "h" }, moshStatsConnFailed: true };
sessions.set("sid", session);
const api = createSessionOpsApi({
get sessions() {
return sessions;
},
setTimeout,
clearTimeout,
Buffer,
quoteShellArg,
ensureMoshStatsConnection: async () => null,
});
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, false);
assert.notEqual(result.pending, true);
});
test("getServerStats returns an error for an unknown session", async () => {
const sessions = new Map();
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "missing" });
assert.equal(result.success, false);
});
test("getServerStats wraps probes in a remote watchdog matching the client timeout", async () => {
const commands = [];
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
_reuseEndpoint: { hostname: "slow.example", port: 22 },
conn: {
exec(command, cb) {
commands.push(command);
cb(null, fakeStream(LINUX_STATS));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getServerStats({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(commands.length, 2);
for (const command of commands) {
// The watchdog must be armed before the probe and killed after it, with
// the same 10s bound the client enforces, so an abandoned probe cannot
// linger and burn CPU on the remote host (#3187). It must also kill the
// probe's whole descendant tree: a probe blocked in an external child
// (df, ps, lsof, ...) would otherwise survive `kill -9 $$` and keep
// holding the channel's output descriptors.
assert.ok(
command.startsWith('exec sh -c '),
`missing POSIX sh wrap: ${command.slice(0, 120)}`,
);
assert.ok(
command.includes('( sleep 10 &&'),
`missing watchdog arm: ${command.slice(0, 160)}`,
);
assert.ok(
command.includes('kill -9 $nc_tree "$$"'),
"watchdog must kill the probe's descendant tree, not only the shell",
);
// The watchdog's stdio must be detached from the channel so its `sleep`
// child cannot hold the channel's output descriptors open.
assert.ok(
command.includes(") </dev/null >/dev/null 2>&1 & nc_watchdog_pid=$!"),
"watchdog subshell must not inherit the channel's stdio",
);
// Cleanup must reap the watchdog's pending `sleep` (before killing the
// subshell, while the PPID walk can still find it): killing only the
// subshell would leave the `sleep` alive for the full watchdog duration,
// delaying the channel close and racing the client-side timeout.
assert.ok(
command.includes('kill -9 $nc_kids "$nc_watchdog_pid"'),
"watchdog cleanup must reap the watchdog's pending sleep child",
);
assert.ok(
command.includes("exit $nc_status"),
"watchdog cleanup must preserve the probe exit status",
);
assert.ok(command.includes("( sleep 10 &&"), "watchdog bound must match the 10s stats run timeout");
}
assert.ok(commands[0].includes("NC_LATENCY_MARK"));
assert.ok(commands[1].includes('echo "DISKS:$disks"'));
});
test("getSessionDistroInfo wraps the os-release probe in a remote watchdog", async () => {
const commands = [];
const sessions = new Map();
sessions.set("sid", {
type: "ssh",
conn: {
exec(command, cb) {
commands.push(command);
cb(null, fakeStream('NAME="UnionTech OS Server 20"\nID=uos'));
},
},
});
const api = makeSessionOps(sessions);
const result = await api.getSessionDistroInfo({ sender: {} }, { sessionId: "sid" });
assert.equal(result.success, true);
assert.equal(commands.length, 1);
assert.ok(
commands[0].startsWith('exec sh -c '),
"distro probe must force POSIX sh so fish/zsh login shells can parse it",
);
assert.ok(
commands[0].includes('( sleep 5 &&'),
"distro probe must carry a 5s remote watchdog",
);
assert.ok(
commands[0].includes('kill -9 $nc_tree "$$"'),
"distro watchdog must kill the probe's descendant tree, not only the shell",
);
assert.ok(
commands[0].includes(") </dev/null >/dev/null 2>&1 & nc_watchdog_pid=$!"),
"distro watchdog subshell must not inherit the channel's stdio",
);
assert.ok(
commands[0].includes('kill -9 $nc_kids "$nc_watchdog_pid"'),
"distro watchdog cleanup must reap the watchdog's pending sleep child",
);
assert.ok(commands[0].includes("cat /etc/os-release"));
});
for (const blocked of [false, true]) {
test(`real distro probe ${blocked ? 'kills blocked children' : 'cleans its watchdog after success'}`, {
skip: process.platform === 'win32', timeout: 10000,
}, async () => {
const fs = require('node:fs');
const path = require('node:path');
const { spawn } = require('node:child_process');
const directory = require('../tempDirBridge.cjs').getTempFilePath('watchdog-test');
fs.mkdirSync(directory, { mode: 0o700 });
fs.writeFileSync(path.join(directory, 'cat'), blocked
? '#!/bin/sh\nexec /bin/sleep 30\n'
: '#!/bin/sh\nprintf probe_completed\n', { mode: 0o700 });
const commands = [];
const api = makeSessionOps(new Map([['watchdog-smoke', {
type: 'ssh', conn: { exec(command, cb) { commands.push(command); cb(null, fakeStream('fixture')); } },
}]]));
const captured = await api.getSessionDistroInfo({}, { sessionId: 'watchdog-smoke' });
assert.equal(captured.success, true);
assert.equal(commands.length, 1);
const started = Date.now();
const child = spawn('/bin/sh', ['-c', commands[0]], {
detached: true, env: { ...process.env, PATH: `${directory}:${process.env.PATH}` },
stdio: ['ignore', 'pipe', 'pipe'],
});
let output = '', outcome = null;
child.stdout.on('data', data => { output += data; });
child.stderr.resume();
const finished = new Promise((resolve, reject) => {
child.once('error', reject);
child.once('close', (code, signal) => { outcome = { code, signal }; resolve(); });
});
let timer;
try {
await Promise.race([finished, new Promise(resolve => { timer = setTimeout(resolve, 7000); })]);
const ps = spawnSync('ps', ['-axo', 'pid=,pgid=,stat='], { encoding: 'utf8' });
assert.equal(ps.status, 0, ps.stderr);
const living = ps.stdout.split('\n').map(line => line.trim().split(/\s+/))
.filter(row => Number(row[1]) === child.pid && !row[2].startsWith('Z'));
assert.ok(outcome, `probe did not close; descendants still alive: ${JSON.stringify(living)}`);
assert.deepEqual(living, [], 'probe must not leave a child or watchdog sleep running');
if (blocked) {
assert.equal(outcome.signal, 'SIGKILL');
assert.ok(Date.now() - started >= 4500, 'remote watchdog must own the timeout');
} else {
assert.equal(outcome.code, 0);
assert.equal(output, 'probe_completed');
assert.ok(Date.now() - started < 2000, 'success must not wait for the watchdog deadline');
}
} finally {
clearTimeout(timer);
try { process.kill(-child.pid, 'SIGKILL'); } catch (error) { if (error.code !== 'ESRCH') throw error; }
await finished;
fs.rmSync(directory, { recursive: true, force: true });
}
});
}
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