Internal utilities. More...

Functions
variable *	get_variable (std::string_view name)
	Get a pointer to an internal variable with the given name.

void	set_variable (const std::string &name, const std::string &value)
	Set the value of an internal variable with the given name.

void	msh_init ()
	Initialize the shell.

void	msh_exit ()
	Perform necessary operations before exiting the shell.

Variables
std::vector< variable >	variables
	The internal variable table.

const std::map< TokenType, int >	token_flags
	The internal token flags table.

Detailed Description

Internal utilities.

Function Documentation

◆ get_variable()

variable * get_variable ( std::string_view name )

Get a pointer to an internal variable with the given name.

Parameters

name	Name of the variable.

Returns: Pointer to the variable, nullptr otherwise

◆ msh_exit()

void msh_exit ( )

Perform necessary operations before exiting the shell.

Saves the history to the file specified by MSH_HISTORY_PATH.

Note: MSH_HISTORY_PATH is set automatically by the build system.

See also: MSH_HISTORY_PATH; write_history; atexit

◆ msh_init()

void msh_init ( )

Initialize the shell.

This function should be called before any other shell functions.

Sets up necessary handlers, job control, and copies the current process environment variables internally.

Sets the SHELL and VERSION to default values specified in msh_internal.h

◆ set_variable()

void set_variable	(	const std::string &	name,
		const std::string &	value )

Set the value of an internal variable with the given name.

Parameters

name	Name of the variable.
value	Value to set.

Variable Documentation

◆ token_flags

const std::map<TokenType, int> token_flags

Initial value:

= {
        {TokenType::EMPTY,     0},
        {TokenType::WORD,      WORD_LIKE | GLOB_EXPAND | VAR_EXPAND},
        {TokenType::COMMAND,   WORD_LIKE | VAR_EXPAND},
#ifdef ENABLE_DOUBLE_QUOTE_WILDCARD_SUBSTITUTION
        {TokenType::DQSTRING,  WORD_LIKE | IS_STRING | VAR_EXPAND | GLOB_EXPAND},
#else
        {TokenType::DQSTRING, WORD_LIKE | NO_WORD_SPLIT | VAR_EXPAND},
#endif
        {TokenType::SQSTRING, WORD_LIKE | NO_WORD_SPLIT},
        {TokenType::VAR_DECL,  ASSIGNMENT_WORD},
        {TokenType::SUBOPEN,   UNSUPPORTED | COMMAND_SEPARATOR},
        {TokenType::SUBCLOSE,  UNSUPPORTED},
        {TokenType::AMP,       COMMAND_SEPARATOR},
        {TokenType::AND,       COMMAND_SEPARATOR},
        {TokenType::PIPE,      COMMAND_SEPARATOR},
        {TokenType::PIPE_AMP,  COMMAND_SEPARATOR},
        {TokenType::OR,        COMMAND_SEPARATOR},
        {TokenType::OUT,       REDIRECT},
        {TokenType::OUT_APPEND,REDIRECT},
        {TokenType::IN,        REDIRECT},
        {TokenType::OUT_AMP,   REDIRECT},
        {TokenType::IN_AMP,    REDIRECT},
        {TokenType::AMP_OUT,   REDIRECT},
        {TokenType::AMP_APPEND,REDIRECT},
        {TokenType::SEMICOLON, COMMAND_SEPARATOR},
        {TokenType::COM_SUB,   WORD_LIKE},
}

The internal token flags table.

Maps token types to their corresponding flags.

See also: TokenType

Note: Wildcard expansion is disabled for double quoted strings by default. To enable it, define ENABLE_DOUBLE_QUOTE_WILDCARD_SUBSTITUTION in CMakeLists.txt.; Glob expansion is not performed for COMMAND tokens by default due to requirement We ignore masks in the program name. However, this behavior is unnatural.

◆ variables

std::vector<variable> variables

The internal variable table.

Maps variable names to variable objects.

See also: variable

Functions

Variables