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LibCore: Add convenience templates for System::{unveil,pledge}

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These convenience templates allow the following to be written as before:

    TRY(Core::System::pledge("promises..."));
    TRY(Core::System::pledge("promises...", "execpromises..."));
    TRY(Core::System::unveil("path", "permissions"));
    TRY(Core::System::unveil(nullptr, nullptr));

Other uses must now append sv to any literal string passed to pledge and
unveil.
This commit is contained in:
sin-ack 2022-07-11 20:49:07 +00:00 committed by Andreas Kling
parent a4c251f858
commit 828060e631
Notes: sideshowbarker 2024-07-17 09:27:22 +09:00 
Author: https://github.com/sin-ack
Commit: https://github.com/SerenityOS/serenity/commit/828060e631
Pull-request: https://github.com/SerenityOS/serenity/pull/14555
Reviewed-by: https://github.com/Dexesttp ✅
Reviewed-by: https://github.com/kleinesfilmroellchen
1 changed files with 23 additions and 0 deletions
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23
Userland/Libraries/LibCore/System.h
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@ -55,6 +55,29 @@ inline ErrorOr<void> unveil(StringView, StringView)
inline ErrorOr<void> pledge(StringView, StringView = {}) { return {}; }
#endif
template<size_t N>
ALWAYS_INLINE ErrorOr<void> pledge(char const (&promises)[N])
{
return pledge(StringView { promises, N - 1 });
}
template<size_t NPromises, size_t NExecPromises>
ALWAYS_INLINE ErrorOr<void> pledge(char const (&promises)[NPromises], char const (&execpromises)[NExecPromises])
{
return pledge(StringView { promises, NPromises - 1 }, StringView { execpromises, NExecPromises - 1 });
}
template<size_t NPath, size_t NPermissions>
ALWAYS_INLINE ErrorOr<void> unveil(char const (&path)[NPath], char const (&permissions)[NPermissions])
{
return unveil(StringView { path, NPath - 1 }, StringView { permissions, NPermissions - 1 });
}
ALWAYS_INLINE ErrorOr<void> unveil(std::nullptr_t, std::nullptr_t)
{
return unveil(StringView {}, StringView {});
}
#ifndef AK_OS_BSD_GENERIC
ErrorOr<Optional<struct spwd>> getspent();
ErrorOr<Optional<struct spwd>> getspnam(StringView name);