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notes: fixup whitespace

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Khaïs COLIN 2025-02-07 16:02:50 +01:00
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@ -67,7 +67,7 @@ The first **word** specifies a command to be executed, with the rest of the
The return status (see _Exit Status_) of a simple command is its exit status as The return status (see _Exit Status_) of a simple command is its exit status as
provided by the POSIX 1003.1 waitpid function, or 128+n if the command was provided by the POSIX 1003.1 waitpid function, or 128+n if the command was
terminated by signal n. terminated by signal n.
#### Pipelines #### Pipelines
@ -76,7 +76,7 @@ cf. 3.2.3 Pipelines
A pipeline is a sequence of one or more commands separated by the control operator '|'. A pipeline is a sequence of one or more commands separated by the control operator '|'.
The output of each command in the pipeline is connected via a pipe to the input The output of each command in the pipeline is connected via a pipe to the input
of the next command. of the next command.
That is, each command reads the previous command’s output. That is, each command reads the previous command’s output.
This connection is performed before any redirections specified by the first This connection is performed before any redirections specified by the first
command. command.
@ -106,7 +106,7 @@ A list is a sequence of one or more pipelines separated by one of the
**operators** ‘&&’, or ‘||’, and optionally terminated by a newline. **operators** ‘&&’, or ‘||’, and optionally terminated by a newline.
AND and OR lists are sequences of one or more pipelines separated by the control AND and OR lists are sequences of one or more pipelines separated by the control
operators ‘&&’ and ‘||’, respectively. operators ‘&&’ and ‘||’, respectively.
AND and OR lists are executed with left associativity. AND and OR lists are executed with left associativity.
e.g. e.g.
@ -144,7 +144,7 @@ executed in the list.
cf. 3.2.5 Compound Commands cf. 3.2.5 Compound Commands
Each group begins with the **control operator** '(' and ends with the Each group begins with the **control operator** '(' and ends with the
**control operator** ')'. **control operator** ')'.
Any redirections associated with a _group of commands_ apply to all commands Any redirections associated with a _group of commands_ apply to all commands
@ -183,7 +183,7 @@ order:
* command substitution (left to right) * command substitution (left to right)
* word splitting * word splitting
* filename expansion * filename expansion
We only have to implement the following kinds: We only have to implement the following kinds:
* parameter expansion * parameter expansion
* word splitting * word splitting
@ -253,7 +253,7 @@ cf. 3.5.8.1 Pattern Matching
Any character that appears in a pattern, other than the special pattern Any character that appears in a pattern, other than the special pattern
characters described below, matches itself. The NUL character may not occur in characters described below, matches itself. The NUL character may not occur in
a pattern. a pattern.
The special pattern characters have the following meanings: The special pattern characters have the following meanings:
'\*' '\*'
@ -281,11 +281,11 @@ expansions are removed.
cf. 3.7.3 Command Execution Environment cf. 3.7.3 Command Execution Environment
The shell has an execution environment, which consists of the following: The shell has an execution environment, which consists of the following:
open files inherited by the shell at invocation, as modified by redirections open files inherited by the shell at invocation, as modified by redirections
the current working directory as set by cd or inherited by the shell at invocation the current working directory as set by cd or inherited by the shell at invocation
shell variables, passed in the environment shell variables, passed in the environment
@ -310,8 +310,8 @@ delimiter is the result of quote removal on word, and the lines in the
here-document are not expanded. If word is unquoted, all lines of the here-document are not expanded. If word is unquoted, all lines of the
here-document are subjected to parameter expansion, command substitution, and here-document are subjected to parameter expansion, command substitution, and
arithmetic expansion, the character sequence \newline is ignored, and ‘\’ must arithmetic expansion, the character sequence \newline is ignored, and ‘\’ must
be used to quote the characters ‘\’, ‘$’, and ‘`’. be used to quote the characters ‘\’, ‘$’, and ‘`’.
## Definitions ## Definitions
cf. [Bash Reference Manual](https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#Definitions) cf. [Bash Reference Manual](https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#Definitions)
cf. 2 Definitions cf. 2 Definitions
@ -322,16 +322,16 @@ word or an operator
**word** **word**
A sequence of characters treated as a unit by the shell. Words may not include A sequence of characters treated as a unit by the shell. Words may not include
unquoted metacharacters. unquoted metacharacters.
**operator** **operator**
A **control operator** or a **redirection operator**. A **control operator** or a **redirection operator**.
Operators contain at least one unquoted **metacharacter**. Operators contain at least one unquoted **metacharacter**.
**control operator** **control operator**
A token that performs a control function. A token that performs a control function.
It is a newline or one of the following: '|', ‘||’, ‘&&’, ‘(’, or ‘)’. It is a newline or one of the following: '|', ‘||’, ‘&&’, ‘(’, or ‘)’.
**redirection operator** **redirection operator**
For our project: For our project: