protected int claimFd(EmuUnixFileDescriptor<T> desc) {
		synchronized (descriptors) {
			int fd = lowestFd();
			putDescriptor(fd, desc);
			return fd;
		}
	}
Claim the lowest available file descriptor number for the given descriptor object

<p>
The descriptor will be added to the descriptor table for the claimed number

@param desc the descriptor object
@return the descriptor number
Ghidra/Features/SystemEmulation/src/main/java/ghidra/pcode/emu/unix/AbstractEmuUnixSyscallUseropLibrary.java