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Code Issues Projects Releases Packages Wiki Activity Actions 10

Kernel+LibC+LibCore+UserspaceEmulator: Implement faccessat(2)

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Co-Authored-By: Daniel Bertalan <dani@danielbertalan.dev>
This commit is contained in:
sin-ack 2022-10-01 12:24:56 +00:00 • committed by Andrew Kaster
parent fa692e13f9
commit 2a502fe232
Notes: sideshowbarker 2024-07-17 06:09:44 +09:00
13 changed files with 89 additions and 39 deletions
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12
Kernel/FileSystem/VirtualFileSystem.cpp
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@ -523,24 +523,26 @@ ErrorOr<void> VirtualFileSystem::mkdir(Credentials const& credentials, StringVie
return {};
}
ErrorOr<void> VirtualFileSystem::access(Credentials const& credentials, StringView path, int mode, Custody& base)
ErrorOr<void> VirtualFileSystem::access(Credentials const& credentials, StringView path, int mode, Custody& base, AccessFlags access_flags)
{
auto custody = TRY(resolve_path(credentials, path, base));
auto should_follow_symlinks = !has_flag(access_flags, AccessFlags::DoNotFollowSymlinks);
auto custody = TRY(resolve_path(credentials, path, base, nullptr, should_follow_symlinks ? 0 : O_NOFOLLOW_NOERROR));
auto& inode = custody->inode();
auto metadata = inode.metadata();
auto use_effective_ids = has_flag(access_flags, AccessFlags::EffectiveAccess) ? UseEffectiveIDs::Yes : UseEffectiveIDs::No;
if (mode & R_OK) {
if (!metadata.may_read(credentials, UseEffectiveIDs::No))
if (!metadata.may_read(credentials, use_effective_ids))
return EACCES;
}
if (mode & W_OK) {
if (!metadata.may_write(credentials, UseEffectiveIDs::No))
if (!metadata.may_write(credentials, use_effective_ids))
return EACCES;
if (custody->is_readonly())
return EROFS;
}
if (mode & X_OK) {
if (!metadata.may_execute(credentials, UseEffectiveIDs::No))
if (!metadata.may_execute(credentials, use_effective_ids))
return EACCES;
}
return {};