63 lines
2.2 KiB
Zig
63 lines
2.2 KiB
Zig
//! /system/services/vfs/vfs-test — a client that proves the VFS round trip end to end: open a
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//! file through the `runtime.fs` file API, write to it, seek back, read it, and compare.
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//! On success it heartbeats "vfstest: ok" so the kernel test can observe it;
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//! on failure it reports what went wrong. Shipped in the initial_ramdisk alongside vfs.
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const std = @import("std");
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const runtime = @import("runtime");
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const fs = runtime.fs;
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pub fn main(init: runtime.process.Init) void {
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const payload = "hello-vfs";
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// The "park" role (the vfs-client-death test): open a file, then hold the
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// handle forever without closing — the kill and the VFS's release-on-death
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// are the point.
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if (init.arguments.count > 1) {
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var parked: ?fs.File = null;
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var tries: u32 = 0;
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while (parked == null and tries < 200) : (tries += 1) {
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parked = fs.open("parked", .{ .create = true });
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if (parked == null) runtime.system.sleep(20);
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}
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if (parked == null) {
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_ = runtime.system.write("vfstest: park open failed\n");
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return;
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}
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while (true) {
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_ = runtime.system.write("vfstest: parked\n");
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runtime.system.sleep(500);
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}
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}
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// The VFS server may not have registered yet — retry open until it's up.
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var opened: ?fs.File = null;
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var tries: u32 = 0;
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while (opened == null and tries < 200) : (tries += 1) {
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opened = fs.open("greeting", .{ .create = true });
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if (opened == null) runtime.system.sleep(20);
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}
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var greeting = opened orelse {
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_ = runtime.system.write("vfstest: open failed\n");
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return;
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};
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if ((greeting.write(payload) orelse 0) != payload.len) {
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_ = runtime.system.write("vfstest: write failed\n");
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return;
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}
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greeting.seekTo(0);
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var buffer: [32]u8 = undefined;
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const n = greeting.read(&buffer) orelse 0;
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greeting.close();
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if (n == payload.len and std.mem.eql(u8, buffer[0..n], payload)) {
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while (true) {
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_ = runtime.system.write("vfstest: ok\n");
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runtime.system.sleep(1000);
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}
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}
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_ = runtime.system.write("vfstest: mismatch\n");
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}
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