exec.h - 9base - revived minimalist port of Plan 9 userland to Unix
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exec.h (2828B)
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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 Xrdwr(void);
9 extern void Xrdfn(void), Xunredir(void), Xstar(void), Xreturn(void), Xsubshell(void);
10 extern void Xtrue(void), Xword(void), Xwrite(void), Xpipefd(void), Xcase(void);
11 extern void Xlocal(void), Xunlocal(void), Xassign(void), Xsimple(void), Xpopm(void);
12 extern void Xrdcmds(void), Xwastrue(void), Xif(void), Xifnot(void), Xpipewait(void);
13 extern void Xdelhere(void), Xpopredir(void), Xsub(void), Xeflag(void), Xsettrue(void);
14 extern void Xerror(char*);
15 extern void Xerror1(char*);
16 /*
17 * word lists are in correct order,
18 * i.e. word0->word1->word2->word3->0
19 */
20 struct word{
21 char *word;
22 word *next;
23 };
24 struct list{
25 word *words;
26 list *next;
27 };
28 word *newword(char *, word *), *copywords(word *, word *);
29 struct redir{
30 char type; /* what to do */
31 short from, to; /* what to do it to */
32 struct redir *next; /* what else to do (reverse order) */
33 };
34 #define NSTATUS ERRMAX /* length of status (from plan 9) */
35 /*
36 * redir types
37 */
38 #define ROPEN 1 /* dup2(from, to); close(from); */
39 #define RDUP 2 /* dup2(from, to); */
40 #define RCLOSE 3 /* close(from); */
41 struct thread{
42 union code *code; /* code for this thread */
43 int pc; /* code[pc] is the next instruction */
44 struct list *argv; /* argument stack */
45 struct redir *redir; /* redirection stack */
46 struct redir *startredir; /* redir inheritance point */
47 struct var *local; /* list of local variables */
48 char *cmdfile; /* file name in Xrdcmd */
49 struct io *cmdfd; /* file descriptor for Xrdcmd */
50 int iflast; /* static `if not' checking */
51 int eof; /* is cmdfd at eof? */
52 int iflag; /* interactive? */
53 int lineno; /* linenumber */
54 int pid; /* process for Xpipewait to wait for */
55 char status[NSTATUS]; /* status for Xpipewait */
56 tree *treenodes; /* tree nodes created by this process */
57 thread *ret; /* who continues when this finishes */
58 };
59 thread *runq;
60 code *codecopy(code*);
61 code *codebuf; /* compiler output */
62 int ntrap; /* number of outstanding traps */
63 int trap[NSIG]; /* number of outstanding traps per type */
64 struct builtin{
65 char *name;
66 void (*fnc)(void);
67 };
68 extern struct builtin Builtin[];
69 int eflagok; /* kludge flag so that -e doesn't exit in startup */
70 int havefork;
71
72 void execcd(void), execwhatis(void), execeval(void), execexec(void);
73 int execforkexec(void);
74 void execexit(void), execshift(void);
75 void execwait(void), execumask(void), execdot(void), execflag(void);
76 void execfunc(var*), execcmds(io *);