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eval(1)

eval - evaluate the specified commands

EVAL(1) fish-shell EVAL(1)

eval - evaluate the specified commands

eval [COMMANDS ...]

eval evaluates the specified parameters as a command. If more than one parameter is specified, all parameters will be joined using a space character as a separator.

If the command does not need access to stdin, consider using source <> instead.

If no piping or other compound shell constructs are required, variable-expansion-as-command, as in set cmd ls -la; $cmd, is also an option.

The following code will call the ls command and truncate each filename to the first 12 characters.

set cmd ls \| cut -c 1-12
eval $cmd


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September 9, 2026 4.9

fish 4.9.3-r0 · os · ingested 2026-09-30