Difference between revisions of "Bash eval"

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The args are read and concatenated together into a single command. This command is then read and executed by the shell, and its exit status is returned as the value of eval. If there are no args, or only null arguments, eval returns 0.
 
The args are read and concatenated together into a single command. This command is then read and executed by the shell, and its exit status is returned as the value of eval. If there are no args, or only null arguments, eval returns 0.
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One notable use is for indirect variable mutation. See: {{Internal|Bash_Arrays#Indirect_Variable_Access_for_Associative_Arrays|Indirect Variable Access for Associative Arrays}}

Latest revision as of 03:21, 27 June 2020

Internal

Overview

eval [arg ...]

The args are read and concatenated together into a single command. This command is then read and executed by the shell, and its exit status is returned as the value of eval. If there are no args, or only null arguments, eval returns 0.

One notable use is for indirect variable mutation. See:
Indirect Variable Access for Associative Arrays