ladybird/Userland/Utilities/mknod.cpp
2023-06-07 01:01:58 +02:00

84 lines
2.5 KiB
C++

/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2023, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Format.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/FilePermissionsMask.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/sysmacros.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio dpath"));
StringView mode_string { "0666"sv };
StringView name;
StringView type_string;
StringView major_string;
StringView minor_string;
Core::ArgsParser args_parser;
args_parser.set_general_help("Creates a file system node.");
args_parser.add_option(mode_string, "File mode in octal or symbolic notation", "mode", 'm', "mode");
args_parser.add_positional_argument(name, "Pathname to create", "name", Core::ArgsParser::Required::Yes);
args_parser.add_positional_argument(
type_string,
"Type of file to create <b|c|u|p>"
"\n\t\tb\tcreate a block special file"
"\n\t\tc, u\tcreate a character special file"
"\n\t\tp\tcreate a FIFO",
"type",
Core::ArgsParser::Required::Yes);
args_parser.add_positional_argument(major_string, "Major device number", "major", Core::ArgsParser::Required::No);
args_parser.add_positional_argument(minor_string, "Minor device number", "minor", Core::ArgsParser::Required::No);
args_parser.parse(arguments);
auto mask = TRY(Core::FilePermissionsMask::parse(mode_string));
char type = type_string[0];
mode_t mode;
switch (type) {
case 'c':
case 'u':
mode = mask.apply(S_IFCHR);
break;
case 'b':
mode = mask.apply(S_IFBLK);
break;
case 'p':
mode = mask.apply(S_IFIFO);
break;
default:
warnln("Invalid device type {}", type);
return 1;
}
auto maybe_major = major_string.to_int();
auto maybe_minor = minor_string.to_int();
dev_t device;
if (type == 'p') {
if (maybe_major.has_value() || maybe_minor.has_value()) {
warnln("Do not set device numbers when creating FIFO");
return 1;
}
device = makedev(0, 0);
} else {
if (!(maybe_major.has_value() && maybe_minor.has_value())) {
warnln("Major and minor device numbers are required");
return 1;
}
device = makedev(maybe_major.value(), maybe_minor.value());
}
TRY(Core::System::mknod(name, mode, device));
return 0;
}