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Example cat program in Zig
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| // cat example in zig - by hibi | |
| const std = @import("std"); | |
| // good practices | |
| const logger = std.log.scoped(.cat); | |
| pub fn main() !void { | |
| const stdout = std.io.getStdOut(); | |
| var args = std.process.args(); | |
| defer args.deinit(); | |
| // Skip the executable name | |
| _ = args.skip(); | |
| while (args.next()) |arg| { | |
| var file = std.fs.cwd().openFile(arg, .{ .mode = .read_only }) catch |err| { | |
| logger.err("unable to open file \"{s}\": {}", .{ arg, err }); | |
| continue; | |
| }; | |
| defer file.close(); | |
| // x86 page | |
| const BUF_SIZE = 4096; | |
| var buf: [BUF_SIZE]u8 = undefined; | |
| in_file: while (true) { | |
| const bytes_read = file.read(&buf) catch |err| { | |
| logger.err("unable to read file \"{s}\": {}", .{ arg, err }); | |
| break :in_file; | |
| }; | |
| if (bytes_read <= 0) break :in_file; | |
| // Instead of using C-brained null terminator, we make a slice out | |
| // of the buffer. Also, easier to read. | |
| const slice = buf[0..bytes_read]; | |
| _ = try stdout.write(slice); | |
| } | |
| } | |
| } |
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