ly/src/LogFile.zig

52 lines
1.5 KiB
Zig

const std = @import("std");
const LogFile = @This();
path: []const u8,
could_open_log_file: bool = undefined,
file: std.fs.File = undefined,
buffer: []u8,
file_writer: std.fs.File.Writer = undefined,
pub fn init(path: []const u8, buffer: []u8) !LogFile {
var log_file = LogFile{ .path = path, .buffer = buffer };
log_file.could_open_log_file = try openLogFile(path, &log_file);
return log_file;
}
pub fn reinit(self: *LogFile) !void {
self.could_open_log_file = try openLogFile(self.path, self);
}
pub fn deinit(self: *LogFile) void {
self.file_writer.interface.flush() catch {};
self.file.close();
}
fn openLogFile(path: []const u8, log_file: *LogFile) !bool {
var could_open_log_file = true;
open_log_file: {
log_file.file = std.fs.cwd().openFile(path, .{ .mode = .write_only }) catch std.fs.cwd().createFile(path, .{ .mode = 0o666 }) catch {
// If we could neither open an existing log file nor create a new
// one, abort.
could_open_log_file = false;
break :open_log_file;
};
}
if (!could_open_log_file) {
log_file.file = try std.fs.openFileAbsolute("/dev/null", .{ .mode = .write_only });
}
var log_file_writer = log_file.file.writer(log_file.buffer);
// Seek to the end of the log file
if (could_open_log_file) {
const stat = try log_file.file.stat();
try log_file_writer.seekTo(stat.size);
}
log_file.file_writer = log_file_writer;
return could_open_log_file;
}