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// This file is part of river, a dynamic tiling wayland compositor.
//
// Copyright 2020-2021 The River Developers
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, version 3.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
const std = @import("std");
const mem = std.mem;
const io = std.io;
const os = std.os;
const assert = std.debug.assert;
const builtin = @import("builtin");
const wayland = @import("wayland");
const wl = wayland.client.wl;
const zriver = wayland.client.zriver;
const flags = @import("flags");
const usage =
\\usage: riverctl [options] <command>
\\
\\ -h Print this help message and exit.
\\ -version Print the version number and exit.
\\
\\Complete documentation of the recognized commands may be found in
\\the riverctl(1) man page.
\\
;
const gpa = std.heap.c_allocator;
pub const Globals = struct {
control: ?*zriver.ControlV1 = null,
seat: ?*wl.Seat = null,
};
pub fn main() !void {
_main() catch |err| {
if (builtin.mode == .Debug) return err;
switch (err) {
error.RiverControlNotAdvertised => fatal(
\\The Wayland server does not support river-control-unstable-v1.
\\Do your versions of river and riverctl match?
, .{}),
error.SeatNotAdverstised => fatal(
\\The Wayland server did not advertise any seat.
, .{}),
else => return err,
}
};
}
fn _main() !void {
// This line is here because of https://github.com/ziglang/zig/issues/7807
const argv: [][*:0]const u8 = os.argv;
const result = flags.parse(argv[1..], &[_]flags.Flag{
.{ .name = "-h", .kind = .boolean },
.{ .name = "-version", .kind = .boolean },
}) catch {
try io.getStdErr().writeAll(usage);
os.exit(1);
};
if (result.boolFlag("-h")) {
try io.getStdOut().writeAll(usage);
os.exit(0);
}
if (result.boolFlag("-version")) {
try io.getStdOut().writeAll(@import("build_options").version ++ "\n");
os.exit(0);
}
const display = try wl.Display.connect(null);
const registry = try display.getRegistry();
var globals = Globals{};
registry.setListener(*Globals, registryListener, &globals);
_ = try display.roundtrip();
const control = globals.control orelse return error.RiverControlNotAdvertised;
const seat = globals.seat orelse return error.SeatNotAdverstised;
for (result.args) |arg| control.addArgument(arg);
const callback = try control.runCommand(seat);
callback.setListener(?*anyopaque, callbackListener, null);
// Loop until our callback is called and we exit.
while (true) _ = try display.dispatch();
}
fn registryListener(registry: *wl.Registry, event: wl.Registry.Event, globals: *Globals) void {
switch (event) {
.global => |global| {
if (std.cstr.cmp(global.interface, wl.Seat.getInterface().name) == 0) {
assert(globals.seat == null); // TODO: support multiple seats
globals.seat = registry.bind(global.name, wl.Seat, 1) catch @panic("out of memory");
} else if (std.cstr.cmp(global.interface, zriver.ControlV1.getInterface().name) == 0) {
globals.control = registry.bind(global.name, zriver.ControlV1, 1) catch @panic("out of memory");
}
},
.global_remove => {},
}
}
fn callbackListener(_: *zriver.CommandCallbackV1, event: zriver.CommandCallbackV1.Event, _: ?*anyopaque) void {
switch (event) {
.success => |success| {
if (mem.len(success.output) > 0) {
const stdout = std.io.getStdOut().writer();
stdout.print("{s}\n", .{success.output}) catch @panic("failed to write to stdout");
}
os.exit(0);
},
.failure => |failure| {
// A small hack to provide usage text when river reports an unknown command.
if (std.cstr.cmp(failure.failure_message, "unknown command") == 0) {
std.log.err("unknown command", .{});
io.getStdErr().writeAll(usage) catch {};
os.exit(1);
}
fatal("{s}", .{failure.failure_message});
},
}
}
fn fatal(comptime format: []const u8, args: anytype) noreturn {
std.log.err(format, args);
std.os.exit(1);
}
|
