48 lines
1.5 KiB
Zig
48 lines
1.5 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` 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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pub fn main() void {
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const u = @import("posix").unistd;
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const payload = "hello-vfs";
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// The VFS server may not have registered yet — retry open until it's up.
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var fd: i32 = -1;
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var tries: u32 = 0;
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while (fd < 0 and tries < 200) : (tries += 1) {
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fd = u.open("greeting", u.O_CREAT);
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if (fd < 0) runtime.system.sleep(20);
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}
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if (fd < 0) {
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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 (u.write(fd, payload) != @as(isize, 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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_ = u.lseek(fd, 0, u.SEEK_SET);
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var buffer: [32]u8 = undefined;
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const n = u.read(fd, &buffer);
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u.close(fd);
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if (n == @as(isize, payload.len) and std.mem.eql(u8, buffer[0..@intCast(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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pub const panic = runtime.panic;
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comptime {
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_ = &runtime.start._start;
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}
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