68 lines
2.2 KiB
Zig
68 lines
2.2 KiB
Zig
//! /system/services/vfs/vfs-test — a client that proves the VFS round trip end to end: open a
|
|
//! file through the `runtime` file API, write to it, seek back, read it, and compare.
|
|
//! On success it heartbeats "vfstest: ok" so the kernel test can observe it;
|
|
//! on failure it reports what went wrong. Shipped in the initial_ramdisk alongside vfs.
|
|
|
|
const std = @import("std");
|
|
const runtime = @import("runtime");
|
|
|
|
pub fn main(init: runtime.process.Init) void {
|
|
const u = @import("posix").unistd;
|
|
const payload = "hello-vfs";
|
|
|
|
// The "park" role (the vfs-client-death test): open a file, then hold the
|
|
// handle forever without closing — the kill and the VFS's release-on-death
|
|
// are the point.
|
|
if (init.arguments.count > 1) {
|
|
var fd: i32 = -1;
|
|
var tries: u32 = 0;
|
|
while (fd < 0 and tries < 200) : (tries += 1) {
|
|
fd = u.open("parked", u.O_CREAT);
|
|
if (fd < 0) runtime.system.sleep(20);
|
|
}
|
|
if (fd < 0) {
|
|
_ = runtime.system.write("vfstest: park open failed\n");
|
|
return;
|
|
}
|
|
while (true) {
|
|
_ = runtime.system.write("vfstest: parked\n");
|
|
runtime.system.sleep(500);
|
|
}
|
|
}
|
|
|
|
// The VFS server may not have registered yet — retry open until it's up.
|
|
var fd: i32 = -1;
|
|
var tries: u32 = 0;
|
|
while (fd < 0 and tries < 200) : (tries += 1) {
|
|
fd = u.open("greeting", u.O_CREAT);
|
|
if (fd < 0) runtime.system.sleep(20);
|
|
}
|
|
if (fd < 0) {
|
|
_ = runtime.system.write("vfstest: open failed\n");
|
|
return;
|
|
}
|
|
|
|
if (u.write(fd, payload) != @as(isize, payload.len)) {
|
|
_ = runtime.system.write("vfstest: write failed\n");
|
|
return;
|
|
}
|
|
_ = u.lseek(fd, 0, u.SEEK_SET);
|
|
|
|
var buffer: [32]u8 = undefined;
|
|
const n = u.read(fd, &buffer);
|
|
u.close(fd);
|
|
|
|
if (n == @as(isize, payload.len) and std.mem.eql(u8, buffer[0..@intCast(n)], payload)) {
|
|
while (true) {
|
|
_ = runtime.system.write("vfstest: ok\n");
|
|
runtime.system.sleep(1000);
|
|
}
|
|
}
|
|
_ = runtime.system.write("vfstest: mismatch\n");
|
|
}
|
|
|
|
pub const panic = runtime.panic;
|
|
comptime {
|
|
_ = &runtime.start._start;
|
|
}
|