Code example for iterating on directory entries.

zig-impl/misc/messing-with-files.zig

@@ -0,0 +1,51 @@
+const std = @import("std");
+const testing = std.testing;
+const net = std.net;
+const fmt = std.fmt;
+const mem = std.mem;
+const print = std.debug.print;
+
+
+fn print_current_dir() !void {
+    const buffer_size = 10000;
+    var buffer: [buffer_size]u8 = undefined;
+    var fba = std.heap.FixedBufferAllocator.init(&buffer);
+    var allocator = fba.allocator();
+
+    print("Print current directory\n", .{});
+    var current_dir = try std.fs.cwd().openIterableDir(".", .{});
+    var walker = try current_dir.walk(allocator);
+    while (try walker.next()) |entry| {
+        print("content: {s}\n", .{entry.basename});
+    }
+    walker.deinit();
+    print("DONE\n", .{});
+}
+
+fn add_line_in_file() !void {
+    var cwd = std.fs.cwd();
+    var f = try cwd.createFile("some-file.log", .{.read = true});
+    // defer f.close(); // closed in add_line_from_fd
+
+    var writer = f.writer();
+
+    try writer.print("hello\n", .{});
+
+    try add_line_from_fd(f.handle);
+}
+
+fn add_line_from_fd(fd: i32) !void {
+    // var f = std.fs.File {.handle = fd};
+    // defer f.close();
+
+    _ = try std.os.write(fd, "hello this is another line\n");
+    std.os.close(fd);
+}
+
+pub fn main() !u8 {
+    // var path = "/tmp/.TEST_USOCK";
+    // print("Opening the file '{s}'.\n", .{path});
+    //try print_current_dir();
+    try add_line_in_file();
+    return 0;
+}