92 行
2.4 KiB
Zig
92 行
2.4 KiB
Zig
|
const std = @import("std");
|
||
|
const fs = std.fs;
|
||
|
const io = std.io;
|
||
|
const os = std.os;
|
||
|
|
||
|
const version = @import("version.zig").version;
|
||
|
|
||
|
fn help() !void {
|
||
|
const stdof = io.getStdOut().writer();
|
||
|
var bw = io.bufferedWriter(stdof);
|
||
|
const stdout = bw.writer();
|
||
|
|
||
|
try stdout.print("076 coreutils\n", .{});
|
||
|
try stdout.print("使用法: whoami\n", .{});
|
||
|
try stdout.print("ユーザー名を表示\n\n", .{});
|
||
|
try stdout.print("-h ヘルプを表示\n", .{});
|
||
|
try stdout.print("-v バージョンを表示\n", .{});
|
||
|
|
||
|
try bw.flush();
|
||
|
}
|
||
|
|
||
|
fn ver() !void {
|
||
|
const stdof = io.getStdOut().writer();
|
||
|
var bw = io.bufferedWriter(stdof);
|
||
|
const stdout = bw.writer();
|
||
|
|
||
|
try stdout.print("whoami (076 coreutils) {s}\n", .{version});
|
||
|
|
||
|
try bw.flush();
|
||
|
}
|
||
|
|
||
|
pub fn main() !void {
|
||
|
var gpa = std.heap.GeneralPurposeAllocator(.{}){};
|
||
|
defer _ = gpa.deinit();
|
||
|
const alloc = gpa.allocator();
|
||
|
|
||
|
var option = std.ArrayList(u8).init(alloc);
|
||
|
defer option.deinit();
|
||
|
|
||
|
const args = try std.process.argsAlloc(alloc);
|
||
|
defer std.process.argsFree(alloc, args);
|
||
|
|
||
|
for (args, 0..) |arg, i| {
|
||
|
if (i == 0) continue;
|
||
|
var m: [1]u8 = [_]u8{'-'};
|
||
|
if (std.mem.eql(u8, arg[0..1], m[0..])) {
|
||
|
for (arg, 0..) |a, j| {
|
||
|
if (j == 0) continue;
|
||
|
try option.append(a);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
for (option.items) |i| {
|
||
|
if (i == 'h') {
|
||
|
try help();
|
||
|
return;
|
||
|
}
|
||
|
if (i == 'v') {
|
||
|
try ver();
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
const stdof = io.getStdOut().writer();
|
||
|
var bw = io.bufferedWriter(stdof);
|
||
|
const stdout = bw.writer();
|
||
|
|
||
|
const file = try fs.cwd().openFile("/etc/passwd", .{});
|
||
|
defer file.close();
|
||
|
|
||
|
var buf: [4096]u8 = undefined;
|
||
|
const stream = file.reader();
|
||
|
const real = try stream.readAll(&buf);
|
||
|
|
||
|
var lines = std.mem.split(u8, buf[0..real], "\n");
|
||
|
while (lines.next()) |*line| {
|
||
|
var fields = std.mem.split(u8, line.*, ":");
|
||
|
var username_opt = fields.next();
|
||
|
_ = fields.next();
|
||
|
var uid_str_opt = fields.next();
|
||
|
if (username_opt != null and uid_str_opt != null) {
|
||
|
const puid = std.fmt.parseInt(u32, uid_str_opt.?, 10) catch continue;
|
||
|
if (puid == os.linux.getuid()) {
|
||
|
try stdout.print("{s}\n", .{username_opt.?});
|
||
|
try bw.flush();
|
||
|
return;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|