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12345678910111213141516171819202122232425262728const std = @import("std");const builtin = @import("builtin");
pub fn getKernelInfo(alloc: std.mem.Allocator) ?[]const u8 { if (comptime builtin.os.tag != .linux) return null; const path = "/proc/sys/kernel/osrelease"; var file = std.fs.openFileAbsolute(path, .{}) catch return null; defer file.close();
// 128 bytes should be enough to hold the kernel information const kernel_info = file.readToEndAlloc(alloc, 128) catch return null; defer alloc.free(kernel_info); return alloc.dupe(u8, std.mem.trim(u8, kernel_info, &std.ascii.whitespace)) catch return null;}
test "read /proc/sys/kernel/osrelease" { if (comptime builtin.os.tag != .linux) return null; const allocator = std.testing.allocator;
const kernel_info = getKernelInfo(allocator).?; defer allocator.free(kernel_info);
// Since we can't hardcode the info in tests, just check // if something was read from the file try std.testing.expect(kernel_info.len > 0); try std.testing.expect(!std.mem.eql(u8, kernel_info, ""));}