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fix(linux-cpu): fix FileNotFound error

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This commit is contained in:
utox39
2025-07-22 22:32:48 +02:00
parent e88586c47a
commit 2de5047eb7
1 changed files with 40 additions and 11 deletions
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51
src/linux/hardware.zig
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@@ -51,6 +51,7 @@ pub fn getCpuInfo(allocator: std.mem.Allocator) !CpuInfo {
// Parsing /proc/cpuinfo // Parsing /proc/cpuinfo
var model_name: ?[]const u8 = null; var model_name: ?[]const u8 = null;
var cpu_max_freq_mhz_str: ?[]const u8 = null;
var lines = std.mem.splitScalar(u8, cpuinfo_data, '\n'); var lines = std.mem.splitScalar(u8, cpuinfo_data, '\n');
while (lines.next()) |line| { while (lines.next()) |line| {
@@ -60,22 +61,50 @@ pub fn getCpuInfo(allocator: std.mem.Allocator) !CpuInfo {
_ = parts.next(); // discards the key _ = parts.next(); // discards the key
if (parts.next()) |value| { if (parts.next()) |value| {
model_name = std.mem.trim(u8, value, " "); model_name = std.mem.trim(u8, value, " ");
break;
} }
} else if (std.mem.startsWith(u8, trimmed, "cpu MHz") and cpu_max_freq_mhz_str == null) {
var parts = std.mem.splitScalar(u8, trimmed, ':');
_ = parts.next(); // discard the key
if (parts.next()) |value| {
cpu_max_freq_mhz_str = std.mem.trim(u8, value, " ");
}
}
if ((model_name != null) and (cpu_max_freq_mhz_str != null)) {
break;
} }
} }
// Reads /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq var cpu_max_freq: f32 = 0.0;
const cpuinfo_max_freq_path = "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq";
var file2 = try std.fs.cwd().openFile(cpuinfo_max_freq_path, .{});
defer file2.close();
const cpuinfo_max_freq_data = try file2.readToEndAlloc(allocator, std.math.maxInt(usize));
defer allocator.free(cpuinfo_max_freq_data);
// Parsing /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq const cpuinfo_max_freq_path = "/sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq";
const trimmed = std.mem.trim(u8, cpuinfo_max_freq_data, " \n\r"); var cmf_exists: bool = true;
const cpu_max_freq_khz: f32 = try std.fmt.parseFloat(f32, trimmed);
const cpu_max_freq: f32 = cpu_max_freq_khz / 1_000_000; // Checks if /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq exists
_ = std.fs.accessAbsolute(cpuinfo_max_freq_path, .{ .mode = .read_only }) catch |err| {
if (err == std.posix.AccessError.FileNotFound) {
cmf_exists = false;
}
};
if (cmf_exists) {
// Reads /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
var file2 = try std.fs.cwd().openFile(cpuinfo_max_freq_path, .{});
defer file2.close();
const cpuinfo_max_freq_data = try file2.readToEndAlloc(allocator, std.math.maxInt(usize));
defer allocator.free(cpuinfo_max_freq_data);
// Parsing /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
const trimmed = std.mem.trim(u8, cpuinfo_max_freq_data, " \n\r");
const cpu_max_freq_khz: f32 = try std.fmt.parseFloat(f32, trimmed);
cpu_max_freq = cpu_max_freq_khz / 1_000_000;
} else {
if (cpu_max_freq_mhz_str != null) {
const cpu_max_freq_mhz: f32 = try std.fmt.parseFloat(f32, cpu_max_freq_mhz_str.?);
cpu_max_freq = cpu_max_freq_mhz / 1_000;
}
}
return CpuInfo{ return CpuInfo{
.cpu_name = try allocator.dupe(u8, model_name orelse "Unknown"), .cpu_name = try allocator.dupe(u8, model_name orelse "Unknown"),