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std.Io: add ioctl / DeviceIoControlFile API

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This commit is contained in:
Andrew Kelley
2026-02-01 01:08:01 -08:00
parent e5454ff780
commit 59073484ba
5 changed files with 211 additions and 58 deletions
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lib/std/Progress.zig
+14 -9
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@@ -573,7 +573,7 @@ fn updateTask(io: Io) void {
{
const resize_flag = wait(io, global_progress.initial_delay_ns);
if (@atomicLoad(bool, &global_progress.done, .monotonic)) return;
maybeUpdateSize(resize_flag);
maybeUpdateSize(io, resize_flag) catch return;
const buffer, _ = computeRedraw(&serialized_buffer);
if (io.vtable.tryLockStderr(io.userdata, null) catch return) |locked_stderr| {
@@ -592,7 +592,7 @@ fn updateTask(io: Io) void {
return clearWrittenWithEscapeCodes(stderr.file_writer) catch {};
}
maybeUpdateSize(resize_flag);
maybeUpdateSize(io, resize_flag) catch return;
const buffer, _ = computeRedraw(&serialized_buffer);
if (io.vtable.tryLockStderr(io.userdata, null) catch return) |locked_stderr| {
@@ -622,7 +622,7 @@ fn windowsApiUpdateTask(io: Io) void {
{
const resize_flag = wait(io, global_progress.initial_delay_ns);
if (@atomicLoad(bool, &global_progress.done, .monotonic)) return;
maybeUpdateSize(resize_flag);
maybeUpdateSize(io, resize_flag) catch return;
const buffer, const nl_n = computeRedraw(&serialized_buffer);
if (io.vtable.tryLockStderr(io.userdata, null) catch return) |locked_stderr| {
@@ -643,7 +643,7 @@ fn windowsApiUpdateTask(io: Io) void {
return clearWrittenWindowsApi() catch {};
}
maybeUpdateSize(resize_flag);
maybeUpdateSize(io, resize_flag) catch return;
const buffer, const nl_n = computeRedraw(&serialized_buffer);
if (io.vtable.tryLockStderr(io.userdata, null) catch return) |locked_stderr| {
@@ -1484,15 +1484,15 @@ fn writevNonblock(io: Io, file: Io.File, iov: [][]const u8) Io.File.Writer.Error
}
}
fn maybeUpdateSize(resize_flag: bool) void {
fn maybeUpdateSize(io: Io, resize_flag: bool) !void {
if (!resize_flag) return;
const fd = global_progress.terminal.handle;
const file = global_progress.terminal;
if (is_windows) {
var info: windows.CONSOLE_SCREEN_BUFFER_INFO = undefined;
if (windows.kernel32.GetConsoleScreenBufferInfo(fd, &info) != windows.FALSE) {
if (windows.kernel32.GetConsoleScreenBufferInfo(file.handle, &info) != windows.FALSE) {
// In the old Windows console, dwSize.Y is the line count of the
// entire scrollback buffer, so we use this instead so that we
// always get the size of the screen.
@@ -1512,8 +1512,13 @@ fn maybeUpdateSize(resize_flag: bool) void {
.ypixel = 0,
};
const err = posix.system.ioctl(fd, posix.T.IOCGWINSZ, @intFromPtr(&winsize));
if (posix.errno(err) == .SUCCESS) {
const err = (try io.operate(.{ .device_io_control = .{
.file = file,
.code = posix.T.IOCGWINSZ,
.arg = &winsize,
} })).device_io_control;
if (err >= 0) {
global_progress.rows = winsize.row;
global_progress.cols = winsize.col;
} else {