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* eval, exec, exit, export, readonly, set, shift, trap: use Open Group links * exec, export, trap: split Linux and POSIX
593 B
593 B
readonly
Create or modify read-only variables within a shell script, preventing the variable from being changed by subsequent commands. This is useful when you want to ensure that a variable retains a constant value throughout the execution of a script. More information: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#readonly.
- Create a read-only variable:
readonly {{variable_name}}={{value}}
- Mark a variable as read-only:
readonly {{existing_variable}}
- [p]rint the names and values of all read-only variables to
stdout
:
readonly -p