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-rw-r--r--bin/dash/src/eval.c1139
1 files changed, 0 insertions, 1139 deletions
diff --git a/bin/dash/src/eval.c b/bin/dash/src/eval.c
deleted file mode 100644
index d4190f95..00000000
--- a/bin/dash/src/eval.c
+++ /dev/null
@@ -1,1139 +0,0 @@
-/*-
- * Copyright (c) 1993
- *	The Regents of the University of California.  All rights reserved.
- * Copyright (c) 1997-2005
- *	Herbert Xu <herbert@gondor.apana.org.au>.  All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Kenneth Almquist.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#include <stdlib.h>
-#include <signal.h>
-#include <unistd.h>
-#include <sys/types.h>
-
-/*
- * Evaluate a command.
- */
-
-#include "init.h"
-#include "main.h"
-#include "shell.h"
-#include "nodes.h"
-#include "syntax.h"
-#include "expand.h"
-#include "parser.h"
-#include "jobs.h"
-#include "eval.h"
-#include "builtins.h"
-#include "options.h"
-#include "exec.h"
-#include "redir.h"
-#include "input.h"
-#include "output.h"
-#include "trap.h"
-#include "var.h"
-#include "memalloc.h"
-#include "error.h"
-#include "show.h"
-#include "mystring.h"
-#ifndef SMALL
-#include "myhistedit.h"
-#endif
-
-
-int evalskip;			/* set if we are skipping commands */
-STATIC int skipcount;		/* number of levels to skip */
-MKINIT int loopnest;		/* current loop nesting level */
-static int funcline;		/* starting line number of current function, or 0 if not in a function */
-
-
-char *commandname;
-int exitstatus;			/* exit status of last command */
-int back_exitstatus;		/* exit status of backquoted command */
-int savestatus = -1;		/* exit status of last command outside traps */
-
-
-#if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3)
-STATIC
-#endif
-void evaltreenr(union node *, int) __attribute__ ((__noreturn__));
-STATIC int evalloop(union node *, int);
-STATIC int evalfor(union node *, int);
-STATIC int evalcase(union node *, int);
-STATIC int evalsubshell(union node *, int);
-STATIC void expredir(union node *);
-STATIC int evalpipe(union node *, int);
-#ifdef notyet
-STATIC int evalcommand(union node *, int, struct backcmd *);
-#else
-STATIC int evalcommand(union node *, int);
-#endif
-STATIC int evalbltin(const struct builtincmd *, int, char **, int);
-STATIC int evalfun(struct funcnode *, int, char **, int);
-STATIC void prehash(union node *);
-STATIC int eprintlist(struct output *, struct strlist *, int);
-STATIC int bltincmd(int, char **);
-
-
-STATIC const struct builtincmd bltin = {
-	.name = nullstr,
-	.builtin = bltincmd,
-	.flags = BUILTIN_REGULAR,
-};
-
-
-/*
- * Called to reset things after an exception.
- */
-
-#ifdef mkinit
-INCLUDE "eval.h"
-
-EXITRESET {
-	if (savestatus >= 0) {
-		if (exception == EXEXIT || evalskip == SKIPFUNCDEF)
-			exitstatus = savestatus;
-		savestatus = -1;
-	}
-	evalskip = 0;
-	loopnest = 0;
-}
-#endif
-
-
-
-/*
- * The eval commmand.
- */
-
-static int evalcmd(int argc, char **argv, int flags)
-{
-        char *p;
-        char *concat;
-        char **ap;
-
-        if (argc > 1) {
-                p = argv[1];
-                if (argc > 2) {
-                        STARTSTACKSTR(concat);
-                        ap = argv + 2;
-                        for (;;) {
-                        	concat = stputs(p, concat);
-                                if ((p = *ap++) == NULL)
-                                        break;
-                                STPUTC(' ', concat);
-                        }
-                        STPUTC('\0', concat);
-                        p = grabstackstr(concat);
-                }
-                return evalstring(p, flags & EV_TESTED);
-        }
-        return 0;
-}
-
-
-/*
- * Execute a command or commands contained in a string.
- */
-
-int
-evalstring(char *s, int flags)
-{
-	union node *n;
-	struct stackmark smark;
-	int status;
-
-	s = sstrdup(s);
-	setinputstring(s);
-	setstackmark(&smark);
-
-	status = 0;
-	for (; (n = parsecmd(0)) != NEOF; popstackmark(&smark)) {
-		int i;
-
-		i = evaltree(n, flags & ~(parser_eof() ? 0 : EV_EXIT));
-		if (n)
-			status = i;
-
-		if (evalskip)
-			break;
-	}
-	popstackmark(&smark);
-	popfile();
-	stunalloc(s);
-
-	return status;
-}
-
-
-
-/*
- * Evaluate a parse tree.  The value is left in the global variable
- * exitstatus.
- */
-
-int
-evaltree(union node *n, int flags)
-{
-	int checkexit = 0;
-	int (*evalfn)(union node *, int);
-	struct stackmark smark;
-	unsigned isor;
-	int status = 0;
-
-	setstackmark(&smark);
-
-	if (n == NULL) {
-		TRACE(("evaltree(NULL) called\n"));
-		goto out;
-	}
-
-	dotrap();
-
-#ifndef SMALL
-	displayhist = 1;	/* show history substitutions done with fc */
-#endif
-	TRACE(("pid %d, evaltree(%p: %d, %d) called\n",
-	    getpid(), n, n->type, flags));
-	switch (n->type) {
-	default:
-#ifdef DEBUG
-		out1fmt("Node type = %d\n", n->type);
-#ifndef USE_GLIBC_STDIO
-		flushout(out1);
-#endif
-		break;
-#endif
-	case NNOT:
-		status = !evaltree(n->nnot.com, EV_TESTED);
-		goto setstatus;
-	case NREDIR:
-		errlinno = lineno = n->nredir.linno;
-		if (funcline)
-			lineno -= funcline - 1;
-		expredir(n->nredir.redirect);
-		pushredir(n->nredir.redirect);
-		status = redirectsafe(n->nredir.redirect, REDIR_PUSH) ?:
-			 evaltree(n->nredir.n, flags & EV_TESTED);
-		if (n->nredir.redirect)
-			popredir(0);
-		goto setstatus;
-	case NCMD:
-		evalfn = evalcommand;
-checkexit:
-		checkexit = ~flags & EV_TESTED;
-		goto calleval;
-	case NFOR:
-		evalfn = evalfor;
-		goto calleval;
-	case NWHILE:
-	case NUNTIL:
-		evalfn = evalloop;
-		goto calleval;
-	case NSUBSHELL:
-	case NBACKGND:
-		evalfn = evalsubshell;
-		goto checkexit;
-	case NPIPE:
-		evalfn = evalpipe;
-		goto checkexit;
-	case NCASE:
-		evalfn = evalcase;
-		goto calleval;
-	case NAND:
-	case NOR:
-	case NSEMI:
-#if NAND + 1 != NOR
-#error NAND + 1 != NOR
-#endif
-#if NOR + 1 != NSEMI
-#error NOR + 1 != NSEMI
-#endif
-		isor = n->type - NAND;
-		status = evaltree(n->nbinary.ch1,
-				  (flags | ((isor >> 1) - 1)) & EV_TESTED);
-		if ((!status) == isor || evalskip)
-			break;
-		n = n->nbinary.ch2;
-evaln:
-		evalfn = evaltree;
-calleval:
-		status = evalfn(n, flags);
-		goto setstatus;
-	case NIF:
-		status = evaltree(n->nif.test, EV_TESTED);
-		if (evalskip)
-			break;
-		if (!status) {
-			n = n->nif.ifpart;
-			goto evaln;
-		} else if (n->nif.elsepart) {
-			n = n->nif.elsepart;
-			goto evaln;
-		}
-		status = 0;
-		goto setstatus;
-	case NDEFUN:
-		defun(n);
-setstatus:
-		exitstatus = status;
-		break;
-	}
-out:
-	dotrap();
-
-	if (eflag && checkexit && status)
-		goto exexit;
-
-	if (flags & EV_EXIT) {
-exexit:
-		exraise(EXEND);
-	}
-
-	popstackmark(&smark);
-
-	return exitstatus;
-}
-
-
-#if !defined(__alpha__) || (defined(__GNUC__) && __GNUC__ >= 3)
-STATIC
-#endif
-void evaltreenr(union node *n, int flags)
-#ifdef HAVE_ATTRIBUTE_ALIAS
-	__attribute__ ((alias("evaltree")));
-#else
-{
-	evaltree(n, flags);
-	abort();
-}
-#endif
-
-
-static int skiploop(void)
-{
-	int skip = evalskip;
-
-	switch (skip) {
-	case 0:
-		break;
-
-	case SKIPBREAK:
-	case SKIPCONT:
-		if (likely(--skipcount <= 0)) {
-			evalskip = 0;
-			break;
-		}
-
-		skip = SKIPBREAK;
-		break;
-	}
-
-	return skip;
-}
-
-
-STATIC int
-evalloop(union node *n, int flags)
-{
-	int skip;
-	int status;
-
-	loopnest++;
-	status = 0;
-	flags &= EV_TESTED;
-	do {
-		int i;
-
-		i = evaltree(n->nbinary.ch1, EV_TESTED);
-		skip = skiploop();
-		if (skip == SKIPFUNC)
-			status = i;
-		if (skip)
-			continue;
-		if (n->type != NWHILE)
-			i = !i;
-		if (i != 0)
-			break;
-		status = evaltree(n->nbinary.ch2, flags);
-		skip = skiploop();
-	} while (!(skip & ~SKIPCONT));
-	loopnest--;
-
-	return status;
-}
-
-
-
-STATIC int
-evalfor(union node *n, int flags)
-{
-	struct arglist arglist;
-	union node *argp;
-	struct strlist *sp;
-	int status;
-
-	errlinno = lineno = n->nfor.linno;
-	if (funcline)
-		lineno -= funcline - 1;
-
-	arglist.lastp = &arglist.list;
-	for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
-		expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
-	}
-	*arglist.lastp = NULL;
-
-	status = 0;
-	loopnest++;
-	flags &= EV_TESTED;
-	for (sp = arglist.list ; sp ; sp = sp->next) {
-		setvar(n->nfor.var, sp->text, 0);
-		status = evaltree(n->nfor.body, flags);
-		if (skiploop() & ~SKIPCONT)
-			break;
-	}
-	loopnest--;
-
-	return status;
-}
-
-
-
-STATIC int
-evalcase(union node *n, int flags)
-{
-	union node *cp;
-	union node *patp;
-	struct arglist arglist;
-	int status = 0;
-
-	errlinno = lineno = n->ncase.linno;
-	if (funcline)
-		lineno -= funcline - 1;
-
-	arglist.lastp = &arglist.list;
-	expandarg(n->ncase.expr, &arglist, EXP_TILDE);
-	for (cp = n->ncase.cases ; cp && evalskip == 0 ; cp = cp->nclist.next) {
-		for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
-			if (casematch(patp, arglist.list->text)) {
-				/* Ensure body is non-empty as otherwise
-				 * EV_EXIT may prevent us from setting the
-				 * exit status.
-				 */
-				if (evalskip == 0 && cp->nclist.body) {
-					status = evaltree(cp->nclist.body,
-							  flags);
-				}
-				goto out;
-			}
-		}
-	}
-out:
-	return status;
-}
-
-
-
-/*
- * Kick off a subshell to evaluate a tree.
- */
-
-STATIC int
-evalsubshell(union node *n, int flags)
-{
-	struct job *jp;
-	int backgnd = (n->type == NBACKGND);
-	int status;
-
-	errlinno = lineno = n->nredir.linno;
-	if (funcline)
-		lineno -= funcline - 1;
-
-	expredir(n->nredir.redirect);
-	INTOFF;
-	if (!backgnd && flags & EV_EXIT && !have_traps()) {
-		forkreset();
-		goto nofork;
-	}
-	jp = makejob(n, 1);
-	if (forkshell(jp, n, backgnd) == 0) {
-		flags |= EV_EXIT;
-		if (backgnd)
-			flags &=~ EV_TESTED;
-nofork:
-		INTON;
-		redirect(n->nredir.redirect, 0);
-		evaltreenr(n->nredir.n, flags);
-		/* never returns */
-	}
-	status = 0;
-	if (! backgnd)
-		status = waitforjob(jp);
-	INTON;
-	return status;
-}
-
-
-
-/*
- * Compute the names of the files in a redirection list.
- */
-
-STATIC void
-expredir(union node *n)
-{
-	union node *redir;
-
-	for (redir = n ; redir ; redir = redir->nfile.next) {
-		struct arglist fn;
-		fn.lastp = &fn.list;
-		switch (redir->type) {
-		case NFROMTO:
-		case NFROM:
-		case NTO:
-		case NCLOBBER:
-		case NAPPEND:
-			expandarg(redir->nfile.fname, &fn, EXP_TILDE | EXP_REDIR);
-			redir->nfile.expfname = fn.list->text;
-			break;
-		case NFROMFD:
-		case NTOFD:
-			if (redir->ndup.vname) {
-				expandarg(redir->ndup.vname, &fn, EXP_TILDE | EXP_REDIR);
-				fixredir(redir, fn.list->text, 1);
-			}
-			break;
-		}
-	}
-}
-
-
-
-/*
- * Evaluate a pipeline.  All the processes in the pipeline are children
- * of the process creating the pipeline.  (This differs from some versions
- * of the shell, which make the last process in a pipeline the parent
- * of all the rest.)
- */
-
-STATIC int
-evalpipe(union node *n, int flags)
-{
-	struct job *jp;
-	struct nodelist *lp;
-	int pipelen;
-	int prevfd;
-	int pip[2];
-	int status = 0;
-
-	TRACE(("evalpipe(0x%lx) called\n", (long)n));
-	pipelen = 0;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
-		pipelen++;
-	flags |= EV_EXIT;
-	INTOFF;
-	jp = makejob(n, pipelen);
-	prevfd = -1;
-	for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
-		prehash(lp->n);
-		pip[1] = -1;
-		if (lp->next) {
-			if (pipe(pip) < 0) {
-				close(prevfd);
-				sh_error("Pipe call failed");
-			}
-		}
-		if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
-			INTON;
-			if (pip[1] >= 0) {
-				close(pip[0]);
-			}
-			if (prevfd > 0) {
-				dup2(prevfd, 0);
-				close(prevfd);
-			}
-			if (pip[1] > 1) {
-				dup2(pip[1], 1);
-				close(pip[1]);
-			}
-			evaltreenr(lp->n, flags);
-			/* never returns */
-		}
-		if (prevfd >= 0)
-			close(prevfd);
-		prevfd = pip[0];
-		close(pip[1]);
-	}
-	if (n->npipe.backgnd == 0) {
-		status = waitforjob(jp);
-		TRACE(("evalpipe:  job done exit status %d\n", status));
-	}
-	INTON;
-
-	return status;
-}
-
-
-
-/*
- * Execute a command inside back quotes.  If it's a builtin command, we
- * want to save its output in a block obtained from malloc.  Otherwise
- * we fork off a subprocess and get the output of the command via a pipe.
- * Should be called with interrupts off.
- */
-
-void
-evalbackcmd(union node *n, struct backcmd *result)
-{
-	int pip[2];
-	struct job *jp;
-
-	result->fd = -1;
-	result->buf = NULL;
-	result->nleft = 0;
-	result->jp = NULL;
-	if (n == NULL) {
-		goto out;
-	}
-
-	if (pipe(pip) < 0)
-		sh_error("Pipe call failed");
-	jp = makejob(n, 1);
-	if (forkshell(jp, n, FORK_NOJOB) == 0) {
-		FORCEINTON;
-		close(pip[0]);
-		if (pip[1] != 1) {
-			dup2(pip[1], 1);
-			close(pip[1]);
-		}
-		ifsfree();
-		evaltreenr(n, EV_EXIT);
-		/* NOTREACHED */
-	}
-	close(pip[1]);
-	result->fd = pip[0];
-	result->jp = jp;
-
-out:
-	TRACE(("evalbackcmd done: fd=%d buf=0x%x nleft=%d jp=0x%x\n",
-		result->fd, result->buf, result->nleft, result->jp));
-}
-
-static struct strlist *fill_arglist(struct arglist *arglist,
-				    union node **argpp)
-{
-	struct strlist **lastp = arglist->lastp;
-	union node *argp;
-
-	while ((argp = *argpp)) {
-		expandarg(argp, arglist, EXP_FULL | EXP_TILDE);
-		*argpp = argp->narg.next;
-		if (*lastp)
-			break;
-	}
-
-	return *lastp;
-}
-
-static int parse_command_args(struct arglist *arglist, union node **argpp,
-			      const char **path)
-{
-	struct strlist *sp = arglist->list;
-	char *cp, c;
-
-	for (;;) {
-		sp = unlikely(sp->next) ? sp->next :
-					  fill_arglist(arglist, argpp);
-		if (!sp)
-			return 0;
-		cp = sp->text;
-		if (*cp++ != '-')
-			break;
-		if (!(c = *cp++))
-			break;
-		if (c == '-' && !*cp) {
-			if (likely(!sp->next) && !fill_arglist(arglist, argpp))
-				return 0;
-			sp = sp->next;
-			break;
-		}
-		do {
-			switch (c) {
-			case 'p':
-				*path = defpath;
-				break;
-			default:
-				/* run 'typecmd' for other options */
-				return 0;
-			}
-		} while ((c = *cp++));
-	}
-
-	arglist->list = sp;
-	return DO_NOFUNC;
-}
-
-/*
- * Execute a simple command.
- */
-
-STATIC int
-#ifdef notyet
-evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
-#else
-evalcommand(union node *cmd, int flags)
-#endif
-{
-	struct localvar_list *localvar_stop;
-	struct parsefile *file_stop;
-	struct redirtab *redir_stop;
-	union node *argp;
-	struct arglist arglist;
-	struct arglist varlist;
-	char **argv;
-	int argc;
-	struct strlist *osp;
-	struct strlist *sp;
-#ifdef notyet
-	int pip[2];
-#endif
-	struct cmdentry cmdentry;
-	struct job *jp;
-	char *lastarg;
-	const char *path;
-	int spclbltin;
-	int cmd_flag;
-	int execcmd;
-	int status;
-	char **nargv;
-	int vflags;
-	int vlocal;
-
-	errlinno = lineno = cmd->ncmd.linno;
-	if (funcline)
-		lineno -= funcline - 1;
-
-	/* First expand the arguments. */
-	TRACE(("evalcommand(0x%lx, %d) called\n", (long)cmd, flags));
-	file_stop = parsefile;
-	back_exitstatus = 0;
-
-	cmdentry.cmdtype = CMDBUILTIN;
-	cmdentry.u.cmd = &bltin;
-	varlist.lastp = &varlist.list;
-	*varlist.lastp = NULL;
-	arglist.lastp = &arglist.list;
-	*arglist.lastp = NULL;
-
-	cmd_flag = 0;
-	execcmd = 0;
-	spclbltin = -1;
-	vflags = 0;
-	vlocal = 0;
-	path = NULL;
-
-	argc = 0;
-	argp = cmd->ncmd.args;
-	if ((osp = fill_arglist(&arglist, &argp))) {
-		int pseudovarflag = 0;
-
-		for (;;) {
-			find_command(arglist.list->text, &cmdentry,
-				     cmd_flag | DO_REGBLTIN, pathval());
-
-			vlocal++;
-
-			/* implement bltin and command here */
-			if (cmdentry.cmdtype != CMDBUILTIN)
-				break;
-
-			pseudovarflag = cmdentry.u.cmd->flags & BUILTIN_ASSIGN;
-			if (likely(spclbltin < 0)) {
-				spclbltin =
-					cmdentry.u.cmd->flags &
-					BUILTIN_SPECIAL
-				;
-				vlocal = spclbltin ^ BUILTIN_SPECIAL;
-			}
-			execcmd = cmdentry.u.cmd == EXECCMD;
-			if (likely(cmdentry.u.cmd != COMMANDCMD))
-				break;
-
-			cmd_flag = parse_command_args(&arglist, &argp, &path);
-			if (!cmd_flag)
-				break;
-		}
-
-		for (; argp; argp = argp->narg.next)
-			expandarg(argp, &arglist,
-				  pseudovarflag &&
-				  isassignment(argp->narg.text) ?
-				  EXP_VARTILDE : EXP_FULL | EXP_TILDE);
-
-		for (sp = arglist.list; sp; sp = sp->next)
-			argc++;
-
-		if (execcmd && argc > 1)
-			vflags = VEXPORT;
-	}
-
-	localvar_stop = pushlocalvars(vlocal);
-
-	/* Reserve one extra spot at the front for shellexec. */
-	nargv = stalloc(sizeof (char *) * (argc + 2));
-	argv = ++nargv;
-	for (sp = arglist.list ; sp ; sp = sp->next) {
-		TRACE(("evalcommand arg: %s\n", sp->text));
-		*nargv++ = sp->text;
-	}
-	*nargv = NULL;
-
-	lastarg = NULL;
-	if (iflag && funcline == 0 && argc > 0)
-		lastarg = nargv[-1];
-
-	preverrout.fd = 2;
-	expredir(cmd->ncmd.redirect);
-	redir_stop = pushredir(cmd->ncmd.redirect);
-	status = redirectsafe(cmd->ncmd.redirect, REDIR_PUSH|REDIR_SAVEFD2);
-
-	if (unlikely(status)) {
-bail:
-		exitstatus = status;
-
-		/* We have a redirection error. */
-		if (spclbltin > 0)
-			exraise(EXERROR);
-
-		goto out;
-	}
-
-	for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) {
-		struct strlist **spp;
-
-		spp = varlist.lastp;
-		expandarg(argp, &varlist, EXP_VARTILDE);
-
-		if (vlocal)
-			mklocal((*spp)->text, VEXPORT);
-		else
-			setvareq((*spp)->text, vflags);
-	}
-
-	/* Print the command if xflag is set. */
-	if (xflag) {
-		struct output *out;
-		int sep;
-
-		out = &preverrout;
-		outstr(expandstr(ps4val()), out);
-		sep = 0;
-		sep = eprintlist(out, varlist.list, sep);
-		eprintlist(out, osp, sep);
-		outcslow('\n', out);
-#ifdef FLUSHERR
-		flushout(out);
-#endif
-	}
-
-	/* Now locate the command. */
-	if (cmdentry.cmdtype != CMDBUILTIN ||
-	    !(cmdentry.u.cmd->flags & BUILTIN_REGULAR)) {
-		path = unlikely(path) ? path : pathval();
-		find_command(argv[0], &cmdentry, cmd_flag | DO_ERR, path);
-	}
-
-	jp = NULL;
-
-	/* Execute the command. */
-	switch (cmdentry.cmdtype) {
-	case CMDUNKNOWN:
-		status = 127;
-#ifdef FLUSHERR
-		flushout(&errout);
-#endif
-		goto bail;
-
-	default:
-		/* Fork off a child process if necessary. */
-		if (!(flags & EV_EXIT) || have_traps()) {
-			INTOFF;
-			jp = vforkexec(cmd, argv, path, cmdentry.u.index);
-			break;
-		}
-		shellexec(argv, path, cmdentry.u.index);
-		/* NOTREACHED */
-
-	case CMDBUILTIN:
-		if (evalbltin(cmdentry.u.cmd, argc, argv, flags) &&
-		    !(exception == EXERROR && spclbltin <= 0)) {
-raise:
-			longjmp(handler->loc, 1);
-		}
-		break;
-
-	case CMDFUNCTION:
-		if (evalfun(cmdentry.u.func, argc, argv, flags))
-			goto raise;
-		break;
-	}
-
-	status = waitforjob(jp);
-	FORCEINTON;
-
-out:
-	if (cmd->ncmd.redirect)
-		popredir(execcmd);
-	unwindredir(redir_stop);
-	unwindfiles(file_stop);
-	unwindlocalvars(localvar_stop);
-	if (lastarg)
-		/* dsl: I think this is intended to be used to support
-		 * '_' in 'vi' command mode during line editing...
-		 * However I implemented that within libedit itself.
-		 */
-		setvar("_", lastarg, 0);
-
-	return status;
-}
-
-STATIC int
-evalbltin(const struct builtincmd *cmd, int argc, char **argv, int flags)
-{
-	char *volatile savecmdname;
-	struct jmploc *volatile savehandler;
-	struct jmploc jmploc;
-	int status;
-	int i;
-
-	savecmdname = commandname;
-	savehandler = handler;
-	if ((i = setjmp(jmploc.loc)))
-		goto cmddone;
-	handler = &jmploc;
-	commandname = argv[0];
-	argptr = argv + 1;
-	optptr = NULL;			/* initialize nextopt */
-	if (cmd == EVALCMD)
-		status = evalcmd(argc, argv, flags);
-	else
-		status = (*cmd->builtin)(argc, argv);
-	flushall();
-	if (outerr(out1))
-		sh_warnx("%s: I/O error", commandname);
-	status |= outerr(out1);
-	exitstatus = status;
-cmddone:
-	freestdout();
-	commandname = savecmdname;
-	handler = savehandler;
-
-	return i;
-}
-
-STATIC int
-evalfun(struct funcnode *func, int argc, char **argv, int flags)
-{
-	volatile struct shparam saveparam;
-	struct jmploc *volatile savehandler;
-	struct jmploc jmploc;
-	int e;
-	int savefuncline;
-	int saveloopnest;
-
-	saveparam = shellparam;
-	savefuncline = funcline;
-	saveloopnest = loopnest;
-	savehandler = handler;
-	if ((e = setjmp(jmploc.loc))) {
-		goto funcdone;
-	}
-	INTOFF;
-	handler = &jmploc;
-	shellparam.malloc = 0;
-	func->count++;
-	funcline = func->n.ndefun.linno;
-	loopnest = 0;
-	INTON;
-	shellparam.nparam = argc - 1;
-	shellparam.p = argv + 1;
-	shellparam.optind = 1;
-	shellparam.optoff = -1;
-	evaltree(func->n.ndefun.body, flags & EV_TESTED);
-funcdone:
-	INTOFF;
-	loopnest = saveloopnest;
-	funcline = savefuncline;
-	freefunc(func);
-	freeparam(&shellparam);
-	shellparam = saveparam;
-	handler = savehandler;
-	INTON;
-	evalskip &= ~(SKIPFUNC | SKIPFUNCDEF);
-	return e;
-}
-
-
-/*
- * Search for a command.  This is called before we fork so that the
- * location of the command will be available in the parent as well as
- * the child.  The check for "goodname" is an overly conservative
- * check that the name will not be subject to expansion.
- */
-
-STATIC void
-prehash(union node *n)
-{
-	struct cmdentry entry;
-
-	if (n->type == NCMD && n->ncmd.args)
-		if (goodname(n->ncmd.args->narg.text))
-			find_command(n->ncmd.args->narg.text, &entry, 0,
-				     pathval());
-}
-
-
-
-/*
- * Builtin commands.  Builtin commands whose functions are closely
- * tied to evaluation are implemented here.
- */
-
-/*
- * No command given.
- */
-
-STATIC int
-bltincmd(int argc, char **argv)
-{
-	/*
-	 * Preserve exitstatus of a previous possible redirection
-	 * as POSIX mandates
-	 */
-	return back_exitstatus;
-}
-
-
-/*
- * Handle break and continue commands.  Break, continue, and return are
- * all handled by setting the evalskip flag.  The evaluation routines
- * above all check this flag, and if it is set they start skipping
- * commands rather than executing them.  The variable skipcount is
- * the number of loops to break/continue, or the number of function
- * levels to return.  (The latter is always 1.)  It should probably
- * be an error to break out of more loops than exist, but it isn't
- * in the standard shell so we don't make it one here.
- */
-
-int
-breakcmd(int argc, char **argv)
-{
-	int n = argc > 1 ? number(argv[1]) : 1;
-
-	if (n <= 0)
-		badnum(argv[1]);
-	if (n > loopnest)
-		n = loopnest;
-	if (n > 0) {
-		evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
-		skipcount = n;
-	}
-	return 0;
-}
-
-
-/*
- * The return command.
- */
-
-int
-returncmd(int argc, char **argv)
-{
-	int skip;
-	int status;
-
-	/*
-	 * If called outside a function, do what ksh does;
-	 * skip the rest of the file.
-	 */
-	if (argv[1]) {
-		skip = SKIPFUNC;
-		status = number(argv[1]);
-	} else {
-		skip = SKIPFUNCDEF;
-		status = exitstatus;
-	}
-	evalskip = skip;
-
-	return status;
-}
-
-
-int
-falsecmd(int argc, char **argv)
-{
-	return 1;
-}
-
-
-int
-truecmd(int argc, char **argv)
-{
-	return 0;
-}
-
-
-int
-execcmd(int argc, char **argv)
-{
-	if (argc > 1) {
-		iflag = 0;		/* exit on error */
-		mflag = 0;
-		optschanged();
-		shellexec(argv + 1, pathval(), 0);
-	}
-	return 0;
-}
-
-
-STATIC int
-eprintlist(struct output *out, struct strlist *sp, int sep)
-{
-	while (sp) {
-		const char *p;
-
-		p = " %s";
-		p += (1 - sep);
-		sep |= 1;
-		outfmt(out, p, sp->text);
-		sp = sp->next;
-	}
-
-	return sep;
-}