275 lines
9.2 KiB
Zig
275 lines
9.2 KiB
Zig
const std = @import("std");
|
|
const fs = std.fs;
|
|
const io = std.io;
|
|
const os = std.os;
|
|
const fmt = std.fmt;
|
|
const mem = std.mem;
|
|
const heap = std.heap;
|
|
const math = std.math;
|
|
const meta = std.meta;
|
|
const ArrayList = std.ArrayList;
|
|
const Allocator = std.mem.Allocator;
|
|
const BoundedArray = std.BoundedArray;
|
|
|
|
const flags = @import("flags.zig");
|
|
const User = @import("User.zig");
|
|
const PackedUser = @import("PackedUser.zig");
|
|
|
|
const usage =
|
|
\\usage: turbonss-makecorpus [OPTION]...
|
|
\\
|
|
\\Options:
|
|
\\ -h Print this help message and exit
|
|
\\ --directory Write files to given directory (default: .)
|
|
\\ --num-users Number of users (default: 10000)
|
|
\\ --num-groups Number of groups (default: 10000)
|
|
\\ --avg-members Average members per group (default: 1000)
|
|
\\
|
|
;
|
|
|
|
const shells = &[_][]const u8{
|
|
"/bin/bash",
|
|
"/bin/sh",
|
|
"/bin/zsh",
|
|
"/usr/sbin/nologin",
|
|
};
|
|
|
|
pub fn main() void {
|
|
// This line is here because of https://github.com/ziglang/zig/issues/7807
|
|
const argv: []const [*:0]const u8 = os.argv;
|
|
|
|
const stderr = io.getStdErr().writer();
|
|
const stdout = io.getStdOut().writer();
|
|
|
|
execute(stdout, stderr, argv[1..]) catch |err| switch (err) {
|
|
error.User => os.exit(1),
|
|
error.IO => os.exit(3),
|
|
};
|
|
}
|
|
|
|
const options = &[_]flags.Flag{
|
|
.{ .name = "-h", .kind = .boolean },
|
|
.{ .name = "--directory", .kind = .arg },
|
|
.{ .name = "--num-users", .kind = .arg },
|
|
.{ .name = "--num-groups", .kind = .arg },
|
|
.{ .name = "--avg-members", .kind = .arg },
|
|
};
|
|
|
|
fn execute(
|
|
stdout: anytype,
|
|
stderr: anytype,
|
|
argv: []const [*:0]const u8,
|
|
) error{ User, IO }!void {
|
|
const myflags = flags.parse(argv, options) catch {
|
|
stderr.writeAll(usage) catch {};
|
|
return error.User;
|
|
};
|
|
|
|
if (myflags.boolFlag("-h")) {
|
|
stdout.writeAll(usage) catch return error.IO;
|
|
return;
|
|
}
|
|
|
|
if (myflags.args.len != 0) {
|
|
stderr.writeAll(usage) catch {};
|
|
return error.User;
|
|
}
|
|
|
|
const num_users = parseInt(stderr, myflags, "--num-users", 10000) orelse return error.User;
|
|
const num_groups = parseInt(stderr, myflags, "--num-groups", 10000) orelse return error.User;
|
|
const avg_members = parseInt(stderr, myflags, "--avg-members", 1000) orelse return error.User;
|
|
|
|
// longest possible path name: 16k? dunno.
|
|
var buf: [1 << 14]u8 = undefined;
|
|
var fixed = std.heap.FixedBufferAllocator.init(buf[0..]);
|
|
const fixed_a = fixed.allocator();
|
|
const dir = myflags.argFlag("--directory") orelse ".";
|
|
const passwd_path = fs.path.join(fixed_a, &[_][]const u8{ dir, "passwd" }) catch |err| switch (err) {
|
|
error.OutOfMemory => {
|
|
stderr.print("ERROR: --directory too long\n", .{}) catch {};
|
|
return error.User;
|
|
},
|
|
};
|
|
|
|
const open_flags = std.fs.File.CreateFlags{ .mode = 0o644 };
|
|
var passwdf = fs.cwd().createFile(passwd_path, open_flags) catch |err| {
|
|
stderr.print("ERROR: create passwd: {s}\n", .{@errorName(err)}) catch {};
|
|
return error.User;
|
|
};
|
|
defer passwdf.close();
|
|
errdefer os.unlink(passwd_path) catch {};
|
|
try dump_passwd(passwdf.writer(), num_users);
|
|
|
|
fixed.reset();
|
|
// if passwd fit, group will too
|
|
const group_path = fs.path.join(fixed_a, &[_][]const u8{ dir, "group" }) catch unreachable;
|
|
var groupf = fs.cwd().createFile(group_path, open_flags) catch |err| {
|
|
stderr.print("ERROR: creating group: {s}\n", .{@errorName(err)}) catch {};
|
|
return error.User;
|
|
};
|
|
defer groupf.close();
|
|
errdefer os.unlink(group_path) catch {};
|
|
var group_wr = io.bufferedWriter(groupf.writer());
|
|
try dump_group(group_wr.writer(), num_users, num_groups, avg_members);
|
|
group_wr.flush() catch return error.IO;
|
|
|
|
stderr.print("wrote users={d} groups={d} avg-members={d} to {s}\n", .{
|
|
num_users,
|
|
num_groups,
|
|
avg_members,
|
|
dir,
|
|
}) catch {};
|
|
}
|
|
|
|
fn dump_passwd(wr: anytype, num_users: u64) error{IO}!void {
|
|
var i: u32 = 1000000;
|
|
var buf_gecos: [PackedUser.max_gecos_len]u8 = undefined;
|
|
var buf_name: [PackedUser.max_name_len]u8 = undefined;
|
|
var buf_home: [PackedUser.max_home_len]u8 = undefined;
|
|
while (i < 1000000 + num_users) : (i += 1) {
|
|
const name = fmt.bufPrint(buf_name[0..], "u_{d}", .{i}) catch unreachable;
|
|
const gecos = fmt.bufPrint(buf_gecos[0..], "User {d}", .{i}) catch unreachable;
|
|
const home = fmt.bufPrint(buf_home[0..], "/home/{s}", .{name}) catch unreachable;
|
|
const user = User{
|
|
.uid = i,
|
|
.gid = 1000000,
|
|
.name = name,
|
|
.gecos = gecos,
|
|
.home = home,
|
|
.shell = shells[i % shells.len],
|
|
};
|
|
_ = wr.write(user.toLine().constSlice()) catch return error.IO;
|
|
}
|
|
}
|
|
|
|
fn dump_group(wr: anytype, num_users: u64, num_groups: u64, avg_members: u32) error{IO}!void {
|
|
var lw = io.bufferedWriter(wr);
|
|
var lwr = lw.writer();
|
|
var i: u32 = 1000000;
|
|
while (i < 1000000 + num_groups) : (i += 1) {
|
|
lwr.print("g_{d}:x:{d}:", .{ i, i }) catch return error.IO;
|
|
var j: usize = 0;
|
|
if (avg_members > 0) {
|
|
while (j < i % avg_members) : (j += 1) {
|
|
const user_idx = (i + j - 1) % num_users;
|
|
if (j != 0)
|
|
_ = lwr.write(",") catch return error.IO;
|
|
_ = lwr.print("u_{d}", .{1000000 + user_idx}) catch return error.IO;
|
|
}
|
|
}
|
|
_ = lwr.write("\n") catch return error.IO;
|
|
}
|
|
lw.flush() catch return error.IO;
|
|
}
|
|
|
|
fn parseInt(stderr: anytype, myflags: flags.ParseResult(options), option: [:0]const u8, default: u32) ?u32 {
|
|
const arg = myflags.argFlag(option) orelse return default;
|
|
const num = std.fmt.parseUnsigned(u32, arg, 0) catch |err| {
|
|
stderr.print("unable to parse {s}={s}: {s}\n", .{ option, arg, @errorName(err) }) catch {};
|
|
return null;
|
|
};
|
|
return num;
|
|
}
|
|
|
|
const want_group =
|
|
\\g_1000000:x:1000000:
|
|
\\g_1000001:x:1000001:u_1000001
|
|
\\g_1000002:x:1000002:u_1000002,u_1000003
|
|
\\g_1000003:x:1000003:u_1000003,u_1000004,u_1000005
|
|
\\g_1000004:x:1000004:
|
|
\\g_1000005:x:1000005:u_1000005
|
|
\\g_1000006:x:1000006:u_1000006,u_1000000
|
|
\\g_1000007:x:1000007:u_1000000,u_1000001,u_1000002
|
|
\\
|
|
;
|
|
|
|
const want_passwd =
|
|
\\u_1000000:x:1000000:1000000:User 1000000:/home/u_1000000:/bin/bash
|
|
\\u_1000001:x:1000001:1000000:User 1000001:/home/u_1000001:/bin/sh
|
|
\\u_1000002:x:1000002:1000000:User 1000002:/home/u_1000002:/bin/zsh
|
|
\\u_1000003:x:1000003:1000000:User 1000003:/home/u_1000003:/usr/sbin/nologin
|
|
\\u_1000004:x:1000004:1000000:User 1000004:/home/u_1000004:/bin/bash
|
|
\\u_1000005:x:1000005:1000000:User 1000005:/home/u_1000005:/bin/sh
|
|
\\u_1000006:x:1000006:1000000:User 1000006:/home/u_1000006:/bin/zsh
|
|
\\
|
|
;
|
|
|
|
const testing = std.testing;
|
|
|
|
test "turbonss-makecorpus: bad flag" {
|
|
var stdout = ArrayList(u8).init(testing.allocator);
|
|
defer stdout.deinit();
|
|
var stderr = ArrayList(u8).init(testing.allocator);
|
|
defer stderr.deinit();
|
|
|
|
const args = &[_][*:0]const u8{ "--num-users", "x" };
|
|
|
|
const got = execute(stdout.writer(), stderr.writer(), args);
|
|
try testing.expectEqual(got, error.User);
|
|
try testing.expectEqualStrings(stderr.items, "unable to parse --num-users=x: InvalidCharacter\n");
|
|
try testing.expectEqualStrings(stdout.items, "");
|
|
}
|
|
|
|
test "turbonss-makecorpus: simple OK case" {
|
|
const allocator = testing.allocator;
|
|
var stdout = ArrayList(u8).init(allocator);
|
|
defer stdout.deinit();
|
|
var stderr = ArrayList(u8).init(allocator);
|
|
defer stderr.deinit();
|
|
|
|
var tmp = testing.tmpDir(.{});
|
|
//defer tmp.cleanup();
|
|
|
|
const tmp_path = blk: {
|
|
const relative_path = try fs.path.join(allocator, &[_][]const u8{
|
|
"zig-cache",
|
|
"tmp",
|
|
tmp.sub_path[0..],
|
|
});
|
|
defer allocator.free(relative_path);
|
|
const real_path = try fs.realpathAlloc(allocator, relative_path);
|
|
const real_pathZ = try allocator.dupeZ(u8, real_path);
|
|
allocator.free(real_path);
|
|
break :blk real_pathZ;
|
|
};
|
|
defer allocator.free(tmp_path);
|
|
|
|
const args = &[_][*:0]const u8{
|
|
"--num-users",
|
|
"1",
|
|
"--num-groups",
|
|
"1",
|
|
"--avg-members",
|
|
"1",
|
|
"--directory",
|
|
tmp_path,
|
|
};
|
|
|
|
try execute(stdout.writer(), stderr.writer(), args);
|
|
try testing.expectStringStartsWith(stderr.items, "wrote users=1 groups=1 avg-members=1 to /");
|
|
try testing.expectEqualStrings(stdout.items, "");
|
|
|
|
const passwd_fname = try fs.path.join(allocator, &[_][]const u8{ tmp_path, "passwd" });
|
|
defer allocator.free(passwd_fname);
|
|
var passwd_file = try fs.cwd().openFile(passwd_fname, .{ .mode = .read_only });
|
|
defer passwd_file.close();
|
|
var group_file = try fs.cwd().openFile(passwd_fname, .{ .mode = .read_only });
|
|
defer group_file.close();
|
|
}
|
|
|
|
test "turbonss-makecorpus: dump_passwd" {
|
|
var wr = ArrayList(u8).init(testing.allocator);
|
|
defer wr.deinit();
|
|
|
|
try dump_passwd(wr.writer(), 7);
|
|
try testing.expectEqualStrings(want_passwd, wr.items);
|
|
}
|
|
|
|
test "turbonss-makecorpus: dump_group" {
|
|
var wr = ArrayList(u8).init(testing.allocator);
|
|
defer wr.deinit();
|
|
|
|
try dump_group(wr.writer(), 7, 8, 4);
|
|
try testing.expectEqualStrings(want_group, wr.items);
|
|
}
|