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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.
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/ArgsParser.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <grp.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 rpath chown"));
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StringView gid_arg;
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Vector<StringView> paths;
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bool dont_follow_symlinks = false;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Change the owning group for files or directories.");
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args_parser.add_option(dont_follow_symlinks, "Don't follow symlinks", "no-dereference", 'h');
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args_parser.add_positional_argument(gid_arg, "Group ID", "gid");
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args_parser.add_positional_argument(paths, "Paths to files", "paths");
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args_parser.parse(arguments);
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gid_t new_gid = -1;
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if (gid_arg.is_empty()) {
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warnln("Empty gid option");
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return 1;
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}
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auto number = gid_arg.to_number<unsigned>();
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if (number.has_value()) {
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new_gid = number.value();
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} else {
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auto group = TRY(Core::System::getgrnam(gid_arg));
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if (!group.has_value()) {
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warnln("Unknown group '{}'", gid_arg);
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return 1;
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}
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new_gid = group->gr_gid;
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}
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auto has_errors = false;
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for (auto path : paths) {
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ErrorOr<void> maybe_error;
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if (dont_follow_symlinks)
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maybe_error = Core::System::lchown(path, -1, new_gid);
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else
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maybe_error = Core::System::chown(path, -1, new_gid);
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if (maybe_error.is_error()) {
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has_errors = true;
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warnln("Changing group of '{}'. {}", path, maybe_error.release_error());
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}
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}
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return has_errors ? 1 : 0;
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}
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