RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 15:47:44 +00:00
Code Issues Activity Actions

LibCore: Add Core::System::readlink

Browse source
This commit is contained in:
Peter Elliott 2022-10-24 22:15:58 -06:00 • committed by Linus Groh
parent 612a3324d7
commit 415eb17490
2 changed files with 22 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

21
Userland/Libraries/LibCore/System.cpp
View file

@ -1326,4 +1326,25 @@ ErrorOr<void> access(StringView pathname, int mode)
#endif #endif
} }
ErrorOr<String> readlink(StringView pathname)
{
// FIXME: Try again with a larger buffer.
char data[PATH_MAX];
#ifdef AK_OS_SERENITY
Syscall::SC_readlink_params small_params {
{ pathname.characters_without_null_termination(), pathname.length() },
{ data, sizeof(data) }
};
int rc = syscall(SC_readlink, &small_params);
HANDLE_SYSCALL_RETURN_VALUE("readlink", rc, String(data, rc));
#else
String path_string = pathname;
int rc = ::readlink(path_string.characters(), data, sizeof(data));
if (rc == -1)
return Error::from_syscall("readlink"sv, -errno);
return String(data, rc);
#endif
}
} }

1
Userland/Libraries/LibCore/System.h
View file

@ -193,5 +193,6 @@ ErrorOr<int> posix_openpt(int flags);
ErrorOr<void> grantpt(int fildes); ErrorOr<void> grantpt(int fildes);
ErrorOr<void> unlockpt(int fildes); ErrorOr<void> unlockpt(int fildes);
ErrorOr<void> access(StringView pathname, int mode); ErrorOr<void> access(StringView pathname, int mode);
ErrorOr<String> readlink(StringView pathname);
} }