沙盒:修订间差异

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These definitions are used throughout the remainder of this manual.
[[文件:14.png]]
 
POSIX
: 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.
 
blank
: A space or tab character.
 
builtin
: A command that is implemented internally by the shell itself, rather than by an executable program somewhere in the file system.
 
control operator
: A token that performs a control function. It is a newline or one of the following: ‘||’, ‘&&’, ‘&’, ‘;’, ‘;;’, ‘|’, ‘|&’, ‘(’, or ‘)’.
 
exit status
: 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.
 
field
: 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.
 
filename
: A string of characters used to identify a file.
 
job
: A set of processes comprising a pipeline, and any processes descended from it, that are all in the same process group.
 
job control
: A mechanism by which users can selectively stop (suspend) and restart (resume) execution of processes.
 
metacharacter
: A character that, when unquoted, separates words. A metacharacter is a blank or one of the following characters: ‘|’, ‘&’, ‘;’, ‘(’, ‘)’, ‘<’, or ‘>’.
 
name
: A word consisting solely of letters, numbers, and underscores, and beginning with a letter or underscore. Names are used as shell variable and function names. Also referred to as an identifier.
 
operator
: A control operator or a redirection operator. See [[#Redirections|Redirections]], for a list of redirection operators. Operators contain at least one unquoted metacharacter.
 
process group
: A collection of related processes each having the same process group ID.
 
process group ID
: A unique identifier that represents a process group during its lifetime.
 
reserved word
: A word that has a special meaning to the shell. Most reserved words introduce shell flow control constructs, such as for and while.
 
return status
: A synonym for exit status.

2023年10月22日 (日) 12:07的最新版本