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Kernel+LibC+LibCore: Implement the unlinkat(2) syscall

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sin-ack 2022-02-10 11:30:33 +00:00 • committed by Brian Gianforcaro
parent a5514fece9
commit bc7c8879c5
7 changed files with 31 additions and 6 deletions
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21
Kernel/Syscalls/unlink.cpp
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@ -10,12 +10,29 @@
namespace Kernel {
ErrorOr<FlatPtr> Process::sys$unlink(Userspace<char const*> user_path, size_t path_length)
ErrorOr<FlatPtr> Process::sys$unlink(int dirfd, Userspace<char const*> user_path, size_t path_length, int flags)
{
VERIFY_NO_PROCESS_BIG_LOCK(this)
TRY(require_promise(Pledge::cpath));
auto path = TRY(get_syscall_path_argument(user_path, path_length));
TRY(VirtualFileSystem::the().unlink(path->view(), current_directory()));
if (flags & ~AT_REMOVEDIR)
return Error::from_errno(EINVAL);
RefPtr<Custody> base;
if (dirfd == AT_FDCWD) {
base = current_directory();
} else {
auto base_description = TRY(open_file_description(dirfd));
if (!base_description->custody())
return Error::from_errno(EINVAL);
base = base_description->custody();
}
if (flags & AT_REMOVEDIR)
TRY(VirtualFileSystem::the().rmdir(path->view(), *base));
else
TRY(VirtualFileSystem::the().unlink(path->view(), *base));
return 0;
}