SecretFile.cxx

// Linux
#include <sys/syscall.h>
 
// cosmos
#include <cosmos/error/ApiError.hxx>
#include <cosmos/io/SecretFile.hxx>
 
namespace cosmos {
 
void SecretFile::create(const CloseOnExec cloexec) {
        close();
 
        // this is a rather new system call, be prepared for it's non
        // existence
#ifdef SYS_memfd_secret
        auto fd = ::syscall(SYS_memfd_secret, cloexec ? FD_CLOEXEC : 0);
 
        if (fd == -1) {
                cosmos_throw (ApiError("memfd_secret()"));
        }
 
        m_fd.setFD(FileNum{static_cast<int>(fd)});
#else
        (void)cloexec;
        cosmos_throw (ApiError("memfd_secret()", Errno::NO_SYS));
#endif
}
 
} // end ns