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Annotation of lucent/sys/src/cmd/rc/exec.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Definitions used in the interpreter
                      3:  */
                      4: extern void Xappend(void), Xasync(void), Xbackq(void), Xbang(void), Xclose(void);
                      5: extern void Xconc(void), Xcount(void), Xdelfn(void), Xdol(void), Xqdol(void), Xdup(void);
                      6: extern void Xexit(void), Xfalse(void), Xfn(void), Xfor(void), Xglob(void);
                      7: extern void Xjump(void), Xmark(void), Xmatch(void), Xpipe(void), Xread(void);
                      8: extern void Xrdfn(void), Xunredir(void), Xstar(void), Xreturn(void), Xsubshell(void);
                      9: extern void Xtrue(void), Xword(void), Xwrite(void), Xpipefd(void), Xcase(void);
                     10: extern void Xlocal(void), Xunlocal(void), Xassign(void), Xsimple(void), Xpopm(void);
                     11: extern void Xrdcmds(void), Xwastrue(void), Xif(void), Xifnot(void), Xpipewait(void);
                     12: extern void Xdelhere(void), Xpopredir(void), Xsub(void), Xeflag(void), Xsettrue();
                     13: extern void Xerror(char*), Xperror(char*);
                     14: /*
                     15:  * word lists are in correct order,
                     16:  * i.e. word0->word1->word2->word3->0
                     17:  */
                     18: struct word{
                     19:        char *word;
                     20:        word *next;
                     21: };
                     22: struct list{
                     23:        word *words;
                     24:        list *next;
                     25: };
                     26: word *newword(char *, word *), *copywords(word *, word *);
                     27: struct redir{
                     28:        char type;                      /* what to do */
                     29:        short from, to;                 /* what to do it to */
                     30:        struct redir *next;             /* what else to do (reverse order) */
                     31: };
                     32: #define        NSTATUS 64                      /* length of status (from plan 9) */
                     33: /*
                     34:  * redir types
                     35:  */
                     36: #define        ROPEN   1                       /* dup2(from, to); close(from); */
                     37: #define        RDUP    2                       /* dup2(from, to); */
                     38: #define        RCLOSE  3                       /* close(from); */
                     39: struct thread{
                     40:        union code *code;               /* code for this thread */
                     41:        int pc;                         /* code[pc] is the next instruction */
                     42:        struct list *argv;              /* argument stack */
                     43:        struct redir *redir;            /* redirection stack */
                     44:        struct redir *startredir;       /* redir inheritance point */
                     45:        struct var *local;              /* list of local variables */
                     46:        char *cmdfile;                  /* file name in Xrdcmd */
                     47:        struct io *cmdfd;               /* file descriptor for Xrdcmd */
                     48:        int iflast;                     /* static `if not' checking */
                     49:        int eof;                        /* is cmdfd at eof? */
                     50:        int iflag;                      /* interactive? */
                     51:        int lineno;                     /* linenumber */
                     52:        int pid;                        /* process for Xpipewait to wait for */
                     53:        char status[NSTATUS];           /* status for Xpipewait */
                     54:        tree *treenodes;                /* tree nodes created by this process */
                     55:        thread *ret;            /* who continues when this finishes */
                     56: };
                     57: thread *runq;
                     58: code *codecopy(code*);
                     59: code *codebuf;                         /* compiler output */
                     60: int ntrap;                             /* number of outstanding traps */
                     61: int trap[NSIG];                                /* number of outstanding traps per type */
                     62: struct builtin{
                     63:        char *name;
                     64:        void (*fnc)(void);
                     65: }Builtin[];
                     66: int eflagok;                   /* kludge flag so that -e doesn't exit in startup */
                     67: void execcd(void), execwhatis(void), execeval(void), execexec(void);
                     68: void execexit(void), execshift(void);
                     69: void execwait(void), execumask(void), execdot(void), execflag(void);
                     70: void execfunc(var*), execcmds(io *);

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