Subversion Repositories planix.SVN

/*

 * Assume plan 9 by default; if Unix is defined, assume unix.

 * Please don't litter the code with ifdefs.  The five below should be enough.

 */

#ifndef Unix

/* plan 9 */

#include <u.h>

#include <libc.h>

#define	NSIG	32

#define	SIGINT	2

#define	SIGQUIT	3

#define fcntl(fd, op, arg)	/* unix compatibility */

#define F_SETFD

#define FD_CLOEXEC

#else

#include "unix.h"

#endif

#ifndef ERRMAX

#define ERRMAX 128

#endif

#define	YYMAXDEPTH	500

#ifndef YYPREFIX

#ifndef PAREN

#include "x.tab.h"

#endif

#endif

typedef struct tree tree;

typedef struct word word;

typedef struct io io;

typedef union code code;

typedef struct var var;

typedef struct list list;

typedef struct redir redir;

typedef struct thread thread;

typedef struct builtin builtin;

#ifndef Unix

#pragma incomplete word

#pragma incomplete io

#endif

struct tree{

	int	type;

	int	rtype, fd0, fd1;	/* details of REDIR PIPE DUP tokens */

	char	*str;

	int	quoted;

	int	iskw;

	tree	*child[3];

	tree	*next;

};

tree *newtree(void);

tree *token(char*, int), *klook(char*), *tree1(int, tree*);

tree *tree2(int, tree*, tree*), *tree3(int, tree*, tree*, tree*);

tree *mung1(tree*, tree*), *mung2(tree*, tree*, tree*);

tree *mung3(tree*, tree*, tree*, tree*), *epimung(tree*, tree*);

tree *simplemung(tree*), *heredoc(tree*);

void freetree(tree*);

tree *cmdtree;

/*

 * The first word of any code vector is a reference count.

 * Always create a new reference to a code vector by calling codecopy(.).

 * Always call codefree(.) when deleting a reference.

 */

union code{

	void	(*f)(void);

	int	i;

	char	*s;

};

char *promptstr;

int doprompt;

#define	NTOK	8192		/* maximum bytes in a word (token) */

char tok[NTOK + UTFmax];

#define	APPEND	1

#define	WRITE	2

#define	READ	3

#define	HERE	4

#define	DUPFD	5

#define	CLOSE	6

#define RDWR	7

struct var{

	char	*name;		/* ascii name */

	word	*val;		/* value */

	int	changed;

	code	*fn;		/* pointer to function's code vector */

	int	fnchanged;

	int	pc;		/* pc of start of function */

	var	*next;		/* next on hash or local list */

};

var *vlook(char*), *gvlook(char*), *newvar(char*, var*);

#define	NVAR	521

var *gvar[NVAR];		/* hash for globals */

#define	new(type)	((type *)emalloc(sizeof(type)))

void *emalloc(long);

void *Malloc(ulong);

void efree(void *);

struct here{

	tree	*tag;

	char	*name;

	struct here *next;

};

int mypid;

/*

 * Glob character escape in strings:

 *	In a string, GLOB must be followed by *?[ or GLOB.

 *	GLOB* matches any string

 *	GLOB? matches any single character

 *	GLOB[...] matches anything in the brackets

 *	GLOBGLOB matches GLOB

 */

#define	GLOB	'\001'

char **argp;

char **args;

int nerror;		/* number of errors encountered during compilation */

int doprompt;		/* is it time for a prompt? */

/*

 * Which fds are the reading/writing end of a pipe?

 * Unfortunately, this can vary from system to system.

 * 9th edition Unix doesn't care, the following defines

 * work on plan 9.

 */

#define	PRD	0

#define	PWR	1

char *Rcmain, *Fdprefix;

/*

 * How many dot commands have we executed?

 * Used to ensure that -v flag doesn't print rcmain.

 */

int ndot;

char *getstatus(void);

int lastc;

int lastword;