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chmod: Implement the --recursive flag

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Tim Schumacher 2022-07-24 18:59:14 +02:00 committed by Andreas Kling
parent 0329a644f8
commit a031b7a174
Notes: sideshowbarker 2024-07-17 08:35:25 +09:00 
Author: https://github.com/timschumi
Commit: https://github.com/SerenityOS/serenity/commit/a031b7a174
Pull-request: https://github.com/SerenityOS/serenity/pull/14675
1 changed files with 29 additions and 2 deletions
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31
Userland/Utilities/chmod.cpp
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@ -8,6 +8,7 @@
#include <AK/Vector.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/DirIterator.h>
#include <LibCore/FilePermissionsMask.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
@ -18,17 +19,43 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
StringView mode;
Vector<StringView> paths;
bool recursive = false;
Core::ArgsParser args_parser;
args_parser.add_option(recursive, "Change file modes recursively", "recursive", 'R');
args_parser.add_positional_argument(mode, "File mode in octal or symbolic notation", "mode");
args_parser.add_positional_argument(paths, "Paths to file", "paths");
args_parser.parse(arguments);
auto mask = TRY(Core::FilePermissionsMask::parse(mode));
Function<ErrorOr<void>(StringView const&)> update_path_permissions = [&](StringView const& path) -> ErrorOr<void> {
auto stat = TRY(Core::System::lstat(path));
if (S_ISLNK(stat.st_mode)) {
// Symlinks don't get processed unless they are explicitly listed on the command line.
if (!paths.contains_slow(path))
return {};
// The chmod syscall changes the file that a link points to, so we will have to get
// the correct mode to base our modifications on.
stat = TRY(Core::System::stat(path));
}
TRY(Core::System::chmod(path, mask.apply(stat.st_mode)));
if (recursive && S_ISDIR(stat.st_mode)) {
Core::DirIterator it(path, Core::DirIterator::Flags::SkipParentAndBaseDir);
while (it.has_next())
TRY(update_path_permissions(it.next_full_path()));
}
return {};
};
for (auto const& path : paths) {
auto current_access = TRY(Core::System::stat(path));
TRY(Core::System::chmod(path, mask.apply(current_access.st_mode)));
TRY(update_path_permissions(path));
}
return 0;