26 lines
805 B
Zig
26 lines
805 B
Zig
const std = @import("std");
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const gpio = @import("gpio");
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pub fn main() !void {
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var iter_dir = try std.fs.openDirAbsolute("/dev", .{ .iterate = true });
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defer iter_dir.close();
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const stdout = std.io.getStdOut().writer();
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var iter = iter_dir.iterate();
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while (try iter.next()) |entry| {
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if (!hasPrefix(entry.name, "gpiochip")) continue;
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const fl = try iter_dir.openFile(entry.name, .{});
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var chip = try gpio.getChipByFd(fl.handle);
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defer chip.close(); // This will close the fd
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try stdout.print("{s} [{s}] ({d} lines)\n", .{ chip.nameSlice(), chip.labelSlice(), chip.lines });
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}
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}
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fn hasPrefix(s: []const u8, prefix: []const u8) bool {
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if (s.len < prefix.len) return false;
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return (std.mem.eql(u8, s[0..prefix.len], prefix));
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}
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