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− | These definitions are used throughout the remainder of this manual.
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− | POSIX
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− | : A family of open system standards based on Unix. Bash is primarily concerned with the Shell and Utilities portion of the POSIX 1003.1 standard.
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− | blank
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− | : A space or tab character.
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− | builtin
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− | : A command that is implemented internally by the shell itself, rather than by an executable program somewhere in the file system.
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− | control operator
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− | : A token that performs a control function. It is a newline or one of the following: ‘||’, ‘&&’, ‘&’, ‘;’, ‘;;’, ‘|’, ‘|&’, ‘(’, or ‘)’.
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− | exit status
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− | : A unit of text that is the result of one of the shell expansions. After expansion, when executing a command, the resulting fields are used as the command name and arguments.
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− | field
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− | : A unit of text that is the result of one of the shell expansions. After expansion, when executing a command, the resulting fields are used as the command name and arguments.
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− | filename
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− | : A string of characters used to identify a file.
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− | job
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− | : A set of processes comprising a pipeline, and any processes descended from it, that are all in the same process group.
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− | job control
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− | : A mechanism by which users can selectively stop (suspend) and restart (resume) execution of processes.
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− | metacharacter
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− | : A character that, when unquoted, separates words. A metacharacter is a blank or one of the following characters: ‘|’, ‘&’, ‘;’, ‘(’, ‘)’, ‘<’, or ‘>’.
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