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e2e7c4d574
In a bunch of cases, this actually ends up simplifying the code as
to_number will handle something such as:
```
Optional<I> opt;
if constexpr (IsSigned<I>)
opt = view.to_int<I>();
else
opt = view.to_uint<I>();
```
For us.
The main goal here however is to have a single generic number conversion
API between all of the String classes.
84 lines
2.6 KiB
C++
84 lines
2.6 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2023, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Format.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/FilePermissionsMask.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/sysmacros.h>
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio dpath"));
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StringView mode_string { "0666"sv };
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StringView name;
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StringView type_string;
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StringView major_string;
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StringView minor_string;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Creates a file system node.");
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args_parser.add_option(mode_string, "File mode in octal or symbolic notation", "mode", 'm', "mode");
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args_parser.add_positional_argument(name, "Pathname to create", "name", Core::ArgsParser::Required::Yes);
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args_parser.add_positional_argument(
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type_string,
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"Type of file to create <b|c|u|p>"
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"\n\t\tb\tcreate a block special file"
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"\n\t\tc, u\tcreate a character special file"
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"\n\t\tp\tcreate a FIFO",
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"type",
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Core::ArgsParser::Required::Yes);
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args_parser.add_positional_argument(major_string, "Major device number", "major", Core::ArgsParser::Required::No);
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args_parser.add_positional_argument(minor_string, "Minor device number", "minor", Core::ArgsParser::Required::No);
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args_parser.parse(arguments);
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auto mask = TRY(Core::FilePermissionsMask::parse(mode_string));
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char type = type_string[0];
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mode_t mode;
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switch (type) {
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case 'c':
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case 'u':
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mode = mask.apply(S_IFCHR);
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break;
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case 'b':
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mode = mask.apply(S_IFBLK);
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break;
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case 'p':
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mode = mask.apply(S_IFIFO);
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break;
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default:
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warnln("Invalid device type {}", type);
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return 1;
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}
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auto maybe_major = major_string.to_number<int>();
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auto maybe_minor = minor_string.to_number<int>();
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dev_t device;
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if (type == 'p') {
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if (maybe_major.has_value() || maybe_minor.has_value()) {
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warnln("Do not set device numbers when creating FIFO");
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return 1;
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}
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device = makedev(0, 0);
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} else {
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if (!(maybe_major.has_value() && maybe_minor.has_value())) {
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warnln("Major and minor device numbers are required");
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return 1;
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}
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device = makedev(maybe_major.value(), maybe_minor.value());
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}
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TRY(Core::System::mknod(name, mode, device));
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return 0;
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}
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