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9ced683c99
* readonly, {un,}compress, zbarcam: use proper syntax for IO streams
* style-guide: add guidelines for standard streams
* duckdb, perl: add backticks around stdin and stdout
17 lines
541 B
Markdown
17 lines
541 B
Markdown
# readonly
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> Create or modify read-only variables within a shell script, preventing the variable from being changed by subsequent commands.
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> This is useful when you want to ensure that a variable retains a constant value throughout the execution of a script.
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> More information: <https://manned.org/readonly.1p>.
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- Create a read-only variable:
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`readonly {{variable_name}}={{value}}`
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- Mark a variable as read-only:
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`readonly {{existing_variable}}`
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- [p]rint the names and values of all read-only variables to `stdout`:
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`readonly -p`
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