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/*
* Plan9 is defined for plan 9
* V9 is defined for 9th edition
* Sun is defined for sun-os
* Please don't litter the code with ifdefs. The three below (and one in
* getflags) should be enough.
*/
#define Plan9
#ifdef Plan9
#include <u.h>
#include <libc.h>
#undef NSIG
#undef SIGINT
#undef SIGQUIT
#define NSIG 32
#define SIGINT 2
#define SIGQUIT 3
#endif
#ifdef V9
#include <signal.h>
#include <libc.h>
#endif
#ifdef Sun
#include <signal.h>
#endif
#define YYMAXDEPTH 500
#ifndef PAREN
#ifndef YYMAJOR
#include "x.tab.h"
#endif
#endif
#undef pipe /* so that /dev/fd works */
#define searchpath rcsearchpath /* avoid new libc function */
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;
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;
#define NTOK 8192
char tok[NTOK];
#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 */
void (*changefn)(var*);
};
var *vlook(char*), *gvlook(char*), *newvar(char*, var*);
#define NVAR 521
var *gvar[NVAR]; /* hash for globals */
#define new(type) ((type *)emalloc(sizeof(type)))
char *emalloc(long);
void *Malloc(ulong);
void efree(char*);
#define NOFILE 128 /* should come from <param.h> */
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 ((char)0x01)
/*
* onebyte(c), twobyte(c), threebyte(c)
* Is c the first character of a one- two- or three-byte utf sequence?
*/
#define onebyte(c) ((c&0x80)==0x00)
#define twobyte(c) ((c&0xe0)==0xc0)
#define threebyte(c) ((c&0xf0)==0xe0)
#define fourbyte(c) ((c&0xf8)==0xf0)
char **argp;
char **args;
int nerror; /* number of errors encountered during compilation */
extern 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
extern char *Rcmain(), Fdprefix[];
#define register
/*
* 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;
int kidpid;
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