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- Standard Unix streams, redirection and piping
- How and why to direct script diagnostic messages to standard error, but function results to standard output
- Argument defaulting
- Automatically creating a log file for a script
- Capturing standard output in a variable using backtick quoting
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- Starts automatic logging to a log file named using its 1st logFileTag argument.
- Calls stdStreams with its 2nd and 3rd arguments.
- Calls stdStreams again, but this time capturing its output in a local variable using backtick execution syntax, then displays the captured text.
- Calls the echo_se function with some text.
- Calls the echo_se function again, capturing its output in a local variable, then displays the captured text.
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Because backtick execution evaluation creates a new execution environment, and only standard output is returned. |
Why is the $output variable empty in segment 4) when echo_se "Some random text"is called with output being captured?
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Because Because backtick execution evaluation creates a new execution environment, and only standard output is returned. |
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