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AK: Add method to create MappedFile from fd

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Timothy 2021-08-06 11:47:55 +10:00 • committed by Andreas Kling
parent 95ee7069d5
commit bc75ca4fe5
2 changed files with 10 additions and 0 deletions
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9
AK/MappedFile.cpp
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@ -21,6 +21,15 @@ Result<NonnullRefPtr<MappedFile>, OSError> MappedFile::map(const String& path)
if (fd < 0) if (fd < 0)
return OSError(errno); return OSError(errno);
return map_from_fd_and_close(fd, path);
}
Result<NonnullRefPtr<MappedFile>, OSError> MappedFile::map_from_fd_and_close(int fd, [[maybe_unused]] String const& path)
{
if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) {
return OSError(errno);
}
ScopeGuard fd_close_guard = [fd] { ScopeGuard fd_close_guard = [fd] {
close(fd); close(fd);
}; };

1
AK/MappedFile.h
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@ -20,6 +20,7 @@ class MappedFile : public RefCounted<MappedFile> {
public: public:
static Result<NonnullRefPtr<MappedFile>, OSError> map(const String& path); static Result<NonnullRefPtr<MappedFile>, OSError> map(const String& path);
static Result<NonnullRefPtr<MappedFile>, OSError> map_from_fd_and_close(int fd, String const& path);
~MappedFile(); ~MappedFile();
void* data() { return m_data; } void* data() { return m_data; }