Every QNX system also provides a simple RAM-based filesystem that allows read/write files to be placed under /dev/shmem.
This RAM filesystem finds the most use in tiny embedded systems where persistent storage across reboots isn't required, yet where a small, fast, temporary-storage filesystem with limited features is called for.
The filesystem comes for free with procnto and doesn't require any setup. You can simply create files under /dev/shmem and grow them to any size (depending on RAM resources).
Although the RAM filesystem itself doesn't support hard or soft links or directories, you can create a link to it by using process-manager links. For example, you could create a link to a RAM-based /tmp directory:
ln -sP /dev/shmem /tmp
This tells procnto to create a process manager link to /dev/shmem known as /tmp. Application programs can then open files under /tmp as if it were a normal filesystem.