ruby(1) implementation

A part of the implementation of ruby(1) command. More...

Collaboration diagram for ruby(1) implementation:

Macros
#define	RUBY_INIT_STACK
	A convenience macro to call ruby_init_stack(). More...

Functions
void	ruby_sysinit (int *argc, char ***argv)
	Initializes the process for libruby. More...
void	ruby_init (void)
	Calls ruby_setup() and check error. More...
void *	ruby_options (int argc, char **argv)
	Processes command line arguments and compiles the Ruby source to execute. More...
int	ruby_executable_node (void *n, int *status)
	Checks the return value of ruby_options(). More...
int	ruby_run_node (void *n)
	Runs the given compiled source and exits this process. More...
void	ruby_show_version (void)
	Prints the version information of the CRuby interpreter to stdout. More...
void	ruby_show_copyright (void)
	Prints the copyright notice of the CRuby interpreter to stdout. More...

Detailed Description

A part of the implementation of ruby(1) command.

Other programs that embed Ruby interpreter do not always need to use these functions.

Macro Definition Documentation

RUBY_INIT_STACK

#define RUBY_INIT_STACK

Value:

    VALUE variable_in_this_stack_frame; \
    ruby_init_stack(&variable_in_this_stack_frame);

A convenience macro to call ruby_init_stack().

Must be placed just after variable declarations.

Definition at line 131 of file interpreter.h.

Function Documentation

ruby_executable_node()

int ruby_executable_node	(	void *	n,
		int *	status
	)

Checks the return value of ruby_options().

ruby_options() sometimes returns a special value to indicate this process should immediately exit. This function checks if the case. Also stores the exit status that the caller have to pass to exit(3) into *status.

Parameters

[in]	n	A return value of ruby_options().
[out]	status	Pointer to the exit status of this process.

Return values

0	The given value is such a special value.
otherwise	The given opaque pointer is actually a compiled source.

Definition at line 294 of file eval.c.

Referenced by ruby_run_node().

ruby_init()

void ruby_init

(

void

)

Calls ruby_setup() and check error.

Prints errors and calls exit(3) if an error occurred.

Definition at line 96 of file eval.c.

ruby_options()

void* ruby_options	(	int	argc,
		char **	argv
	)

Processes command line arguments and compiles the Ruby source to execute.

This function does:

• Processes the given command line flags and arguments for ruby(1)
• Compiles the source code from the given argument, -e or stdin, and
• Returns the compiled source as an opaque pointer to an internal data structure

Parameters

[in]	argc	Process main's argc.
[in]	argv	Process main's argv.

Returns

An opaque pointer to the compiled source or an internal special value. Pass it to ruby_executable_node() to detect which.

See also

ruby_executable_node

Definition at line 109 of file eval.c.

ruby_run_node()

int ruby_run_node

(

void *

n

)

Runs the given compiled source and exits this process.

Parameters

[in]

n

Opaque "node" pointer.

Return values

EXIT_SUCCESS	Successfully run the source.
EXIT_FAILURE	An error occurred.

Definition at line 311 of file eval.c.

ruby_show_copyright()

void ruby_show_copyright

(

void

)

Prints the copyright notice of the CRuby interpreter to stdout.

Definition at line 245 of file version.c.

ruby_show_version()

void ruby_show_version

(

void

)

Prints the version information of the CRuby interpreter to stdout.

Definition at line 231 of file version.c.

ruby_sysinit()

void ruby_sysinit	(	int *	argc,
		char ***	argv
	)

Initializes the process for libruby.

This function assumes this process is ruby(1) and it has just started. Usually programs that embed CRuby interpreter may not call this function, and may do their own initialization.

Parameters

[in]	argc	Pointer to process main's argc.
[in]	argv	Pointer to process main's argv.

Warning

argc and argv cannot be NULL.

Definition at line 3215 of file ruby.c.