ref: 7975eec3e602fd5bc3e93c78f4166259190f2fe9
dir: /utils/rcsh/rc.h/
#define INFERNO_KEEPENVIRON
#include <lib9.h>
#define Lock Rclock
#define Ref Rcref
typedef union Code Code;
typedef struct Tree Tree;
typedef struct Thread Thread;
typedef struct Word Word;
typedef struct Var Var;
typedef struct List List;
typedef struct Redir Redir;
typedef struct Io Io;
typedef struct Here Here;
typedef struct Ref Ref;
typedef struct Lock Lock;
typedef struct Direntry Direntry;
#define EOF (-1)
#define NBUF 512
/* values for Tree->rtype */
#define APPEND 1
#define WRITE 2
#define READ 3
#define HERE 4
#define DUPFD 5
#define CLOSE 6
/*
* redir types
*/
#define ROPEN 1 /* dup2(from, to); close(from); */
#define RDUP 2 /* dup2(from, to); */
#define RCLOSE 3 /* close(from); */
#define NSTATUS 64 /* length of status (from plan 9) */
#define IWS 0x01 /* inter word seperator when word lists are stored in env variables */
/*
* 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)0x02)
/*
* 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;
};
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;
};
struct Thread
{
Code *code; /* code for this thread */
int pc; /* code[pc] is the next instruction */
List *argv; /* argument stack */
Redir *redir; /* redirection stack */
Redir *startredir; /* redir inheritance point */
Var *local; /* list of local variables */
char *cmdfile; /* file name in Xrdcmd */
Io *cmdfd; /* file descriptor for Xrdcmd */
int iflast; /* static `if not' checking */
int eof; /* is cmdfd at eof? */
int iflag; /* interactive? */
int lineno; /* linenumber */
int pid; /* process for Xpipewait to wait for */
char status[NSTATUS]; /* status for Xpipewait */
Tree *treenodes; /* tree nodes created by this process */
Thread *ret; /* who continues when this finishes */
};
struct Io
{
int fd;
char *bufp;
char *ebuf;
char *strp;
char buf[NBUF];
};
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 */
};
struct Word
{
char *word;
Word *next;
};
struct List
{
Word *words;
List *next;
};
struct Redir
{
char type; /* what to do */
short from, to; /* what to do it to */
Redir *next; /* what else to do (reverse order) */
};
struct Here{
Tree *tag;
char *name;
Here *next;
};
struct Lock {
int val;
};
struct Ref
{
Lock lk;
int ref;
};
struct Direntry
{
int isdir;
char *name;
};
/* main.c */
void start(Code *c, int pc, Var *local);
/* lex.c */
void yyerror(char*);
int yylex(void);
int yyparse(void);
int wordchr(int);
int idchr(int);
/* code.c */
int compile(Tree*);
Code *codecopy(Code*);
void codefree(Code*);
void cleanhere(char *f);
void skipnl(void);
void panic(char*, int);
/* var.c */
void kinit(void);
void vinit(void);
Var *vlook(char*);
Var *gvlook(char*);
Var *newvar(char*, Var*);
void setvar(char*, Word*);
void updenv(void);
void kenter(int type, char *name);
/* glob.c */
void deglob(char*);
void globlist(void);
int match(char *s, char *p, int stop);
/* main.c */
void setstatus(char *s);
char *getstatus(void);
int truestatus(void);
void execcmds(Io*);
char *concstatus(char *s, char *t);
char **procargv(char*, char*, char*, char*, Word *w);
void freewords(Word*);
/* tree.c */
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*);
void freenodes(void);
/* here.c */
Tree *heredoc(Tree *tag);
/* exec.c */
extern void Xappend(void), Xasync(void), Xbackq(void), Xbang(void), Xclose(void);
extern void Xconc(void), Xcount(void), Xdelfn(void), Xdol(void), Xqdol(void), Xdup(void);
extern void Xexit(void), Xfalse(void), Xfn(void), Xfor(void), Xglob(void);
extern void Xjump(void), Xmark(void), Xmatch(void), Xpipe(void), Xread(void);
extern void Xunredir(void), Xstar(void), Xreturn(void), Xsubshell(void);
extern void Xtrue(void), Xword(void), Xwrite(void), Xpipefd(void), Xcase(void);
extern void Xlocal(void), Xunlocal(void), Xassign(void), Xsimple(void), Xpopm(void);
extern void Xrdcmds(void), Xwastrue(void), Xif(void), Xifnot(void), Xpipewait(void);
extern void Xdelhere(void), Xpopredir(void), Xsub(void), Xeflag(void), Xsettrue(void);
extern void Xerror(char*), Xperror(char*);
/* word.c */
Word *newword(char*, Word*);
void pushlist(void);
void poplist(void);
void pushword(char*);
void popword(void);
int count(Word*);
Word *copywords(Word*, Word*);
void pushredir(int, int, int);
void turfredir(void);
char *list2str(Word*);
void freelist(Word*);
Word *conclist(Word*, Word*, Word*);
Word *subwords(Word*, int, Word*, Word*);
/* io.c */
#define pchr(b, c) if((b)->bufp==(b)->ebuf)fullbuf((b), (c));else (*(b)->bufp++=(c))
#define rchr(b) ((b)->bufp==(b)->ebuf?emptybuf(b):(*(b)->bufp++&0xff))
Io *openfd(int), *openstr(void), *opencore(char*, int);
int emptybuf(Io*);
void closeio(Io*);
void flush(Io*);
int fullbuf(Io*, int);
void pfmt(Io*, char*, ...);
void perr(Io*);
void pstr(Io*, char*);
void pfnc(Io*, Thread*);
void pprompt(void);
/* trap.c */
void dotrap(void);
void dointr(void);
void waitfor(uint);
/* nt.c */
Direntry* readdirect(char*);
void fatal(char*, ...);
uint proc(char**, int, int, int);
int procwait(uint);
int refinc(Ref*);
int refdec(Ref*);
int pipe(int*);
/*
* 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 new(type) ((type *)malloc(sizeof(type)))
extern Tree *cmdtree;
extern Thread *runq;
extern Io *err;
extern int flag[256];
extern int doprompt;
extern char *promptstr;
extern int ndot;
extern int nerror;
extern Code *codebuf;
extern int eflagok;
extern int interrupted;
extern Ref ntrap;