/dev/full

Template:Special device files In Linux /dev/full or the always full device is a special file that always returns the error code ENOSPC (meaning "No space left on device") on writing, and provides an infinite number of null characters to any process that reads from it (similar to /dev/zero). This device is usually used when testing the behaviour of a program when it encounters a "disk full" error.

 $ echo "Hello world" > /dev/full
 bash: echo: write error: No space left on device

FreeBSD, with the Linux-specific pseudo-devices configured in, also supports /dev/full.

See also

• /dev/null
• Fault injection