From f08fdedcee12c06e3ce9ac9bec363915978e8289 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Sun, 23 Nov 2003 18:04:08 +0000
Subject: Plan 9's rc.

not a clear win over byron's,
but at least it has the right syntax.
---
 src/cmd/rc/exec.h | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)
 create mode 100644 src/cmd/rc/exec.h

(limited to 'src/cmd/rc/exec.h')

diff --git a/src/cmd/rc/exec.h b/src/cmd/rc/exec.h
new file mode 100644
index 00000000..fbfe2dbb
--- /dev/null
+++ b/src/cmd/rc/exec.h
@@ -0,0 +1,71 @@
+/*
+ * Definitions used in the interpreter
+ */
+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 Xrdfn(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*);
+extern void Xerror1(char*);
+/*
+ * word lists are in correct order,
+ * i.e. word0->word1->word2->word3->0
+ */
+struct word{
+	char *word;
+	word *next;
+};
+struct list{
+	word *words;
+	list *next;
+};
+word *newword(char *, word *), *copywords(word *, word *);
+struct redir{
+	char type;			/* what to do */
+	short from, to;			/* what to do it to */
+	struct redir *next;		/* what else to do (reverse order) */
+};
+#define	NSTATUS	ERRMAX			/* length of status (from plan 9) */
+/*
+ * redir types
+ */
+#define	ROPEN	1			/* dup2(from, to); close(from); */
+#define	RDUP	2			/* dup2(from, to); */
+#define	RCLOSE	3			/* close(from); */
+struct thread{
+	union code *code;		/* code for this thread */
+	int pc;				/* code[pc] is the next instruction */
+	struct list *argv;		/* argument stack */
+	struct redir *redir;		/* redirection stack */
+	struct redir *startredir;	/* redir inheritance point */
+	struct var *local;		/* list of local variables */
+	char *cmdfile;			/* file name in Xrdcmd */
+	struct 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 */
+};
+thread *runq;
+code *codecopy(code*);
+code *codebuf;				/* compiler output */
+int ntrap;				/* number of outstanding traps */
+int trap[NSIG];				/* number of outstanding traps per type */
+extern struct builtin{
+	char *name;
+	void (*fnc)(void);
+}Builtin[];
+int eflagok;			/* kludge flag so that -e doesn't exit in startup */
+void execcd(void), execwhatis(void), execeval(void), execexec(void);
+void execexit(void), execshift(void);
+void execwait(void), execumask(void), execdot(void), execflag(void);
+void execfunc(var*), execcmds(io *);
-- 
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