/**
 * @PROJECT			CGI Bash Shell Interface
 * @COPYRIGHT		See COPYING in the top level directory
 * @FILE			subshell.h
 * @PURPOSE			Subshell execution
 * @DEVELOPERS		Nathan Angelacos <nangel@users.sourceforge.net>
 *					Rafal Kupiec <belliash@asiotec.eu.org>
 */

#ifndef __SUBSHELL_H
#define __SUBSHELL_H

static int subshell_pid;
static int subshell_pipe[2];

enum pipe_t { PARENT_IN, PARENT_OUT };
enum tag_t { HTML, RUN, ECHO, TRANSLATE, NOOP };

typedef struct {
	char* name;
	int size;
	uid_t uid;
	gid_t gid;
	char* buf;
	size_t curpos;
	void* next;
} script_t;

typedef struct {
	script_t* script;
	enum tag_t tag;
	size_t len;
	char* buf;
	void* next;
} token_t;

token_t* build_token_list(script_t* scriptbuf, token_t* tokenlist);
void free_script_list(script_t* script);
void free_token_list(token_t* tokenlist);
script_t* load_script(char* filename, script_t* scriptlist);
void preprocess_token_list(token_t* tokenlist);
token_t* process_token_list(buffer_t* buf, token_t* tokenlist);
token_t* push_token_on_list(token_t* tokenlist, script_t* scriptbuf, char* start, size_t len);
void subshell_destroy(void);
void subshell_doscript(buffer_t* script, char* name);
void subshell_echo(buffer_t* buf, char* str, size_t len);
void subshell_eval(buffer_t* buf, char* str, size_t len);
void subshell_exec(buffer_t* buf, char* str);
void subshell_setup(char* shell, list_t* env);
void subshell_translate(buffer_t* buf, char* str, size_t len);

#endif