ptrcnull/bat-alert
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ptrcnull 2023-11-13 02:57:51 +01:00
parent b57cbba805
commit d483eb1bcd
Signed by: ptrcnull
GPG key ID: 411F7B30801DD9CA
2 changed files with 74 additions and 38 deletions
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6
build.zig
View file

@ -24,6 +24,12 @@ pub fn build(b: *std.Build) void {
.optimize = optimize,
});
exe.linkLibC();
exe.addIncludePath(.{ .cwd_relative = "/usr/include/glib-2.0" });
exe.addIncludePath(.{ .cwd_relative = "/usr/lib/glib-2.0/include" });
exe.addIncludePath(.{ .cwd_relative = "/usr/include/gdk-pixbuf-2.0" });
exe.linkSystemLibrary("notify");
// This declares intent for the executable to be installed into the
// standard location when the user invokes the "install" step (the default
// step when running `zig build`).

70
src/main.zig
View file

@ -1,10 +1,23 @@
const std = @import("std");
const c = @cImport({
@cInclude("libnotify/notify.h");
});
pub const std_options = struct {
pub const log_level = .info;
};
const NOTIFICATION_TITLE: [:0]const u8 = "bat-alert";
const NOTIFICATION_BODY: [:0]const u8 = "battery running low!";
const ParseMode = enum { none, target, battery };
pub fn main() !void {
if (c.notify_init("bat-alert") == c.FALSE) {
std.log.err("notify_init failed", .{});
std.process.exit(1);
}
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
defer _ = gpa.deinit();
const allocator = gpa.allocator();
@ -15,7 +28,11 @@ pub fn main() !void {
var target: u8 = 15;
var battery: []const u8 = "BAT0";
var parse_mode = ParseMode.none;
for (args, 0..) |arg, i| {
_ = i;
switch (parse_mode) {
ParseMode.none => {
if (std.mem.eql(u8, arg, "--help")) {
const stdout = std.io.getStdOut().writer();
try stdout.print(
@ -28,35 +45,40 @@ pub fn main() !void {
, .{});
std.process.exit(0);
}
if (std.mem.eql(u8, arg, "--target") or std.mem.eql(u8, arg, "-t")) {
if (i + 1 == args.len) {
std.log.err("--target requires an argument", .{});
std.process.exit(1);
parse_mode = ParseMode.target;
}
const parsedTarget = std.fmt.parseInt(u8, args[i + 1], 10) catch |err| {
std.log.err("invalid target '{s}': {}", .{ args[i + 1], err });
if (std.mem.eql(u8, arg, "--battery")) {
parse_mode = ParseMode.battery;
}
},
ParseMode.battery => {
battery = arg;
parse_mode = ParseMode.none;
},
ParseMode.target => {
const parsedTarget = std.fmt.parseInt(u8, arg, 10) catch {
std.log.err("cannot parse target '{s}' as int", .{arg});
std.process.exit(1);
};
target = parsedTarget;
parse_mode = ParseMode.none;
},
}
if (std.mem.eql(u8, arg, "--battery")) {
if (i + 1 == args.len) {
std.log.err("--battery requires an argument", .{});
}
if (parse_mode != ParseMode.none) {
std.log.err("option requires an argument: --{s}", .{@tagName(parse_mode)});
std.process.exit(1);
}
battery = args[i + 1];
}
}
var sent = false;
const batteryPath = try std.fmt.allocPrint(allocator, "/sys/class/power_supply/{s}/capacity", .{battery});
while (true) {
const capacityFile = try std.fs.openFileAbsolute(batteryPath, .{});
const capacityFile = std.fs.openFileAbsolute(batteryPath, .{}) catch |err| {
std.log.err("open {s}: {}", .{ batteryPath, err });
std.process.exit(1);
};
var capacityStr = std.ArrayList(u8).init(allocator);
try capacityFile.reader().streamUntilDelimiter(capacityStr.writer(), '\n', null);
capacityFile.close();
@ -69,10 +91,18 @@ pub fn main() !void {
if (capacity <= target) {
if (!sent) {
sent = true;
_ = try std.process.Child.exec(.{
.allocator = allocator,
.argv = &[_][]const u8{ "notify-send", "-t", "5000", "-u", "critical", "bat-alert", "battery running low!" },
});
// _ = try std.process.Child.exec(.{
// .allocator = allocator,
// .argv = &[_][]const u8{ "notify-send", "-t", "5000", "-u", "critical", NOTIFICATION_TITLE, NOTIFICATION_BODY },
// });
const notif = c.notify_notification_new(NOTIFICATION_TITLE, NOTIFICATION_BODY, null);
var g_err: [*c]c.GError = null;
const ret = c.notify_notification_show(notif, &g_err);
if (ret == c.FALSE) {
std.log.err("failed to send a notification: {s}", .{g_err.*.message});
}
std.log.info("[NOTIFY] battery running low!", .{});
}
} else {