diff --git a/hush.c b/hush.c
new file mode 100644
index 0000000..f2a4ea4
--- /dev/null
+++ b/hush.c
@@ -0,0 +1,2191 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * sh.c -- a prototype Bourne shell grammar parser
+ *      Intended to follow the original Thompson and Ritchie
+ *      "small and simple is beautiful" philosophy, which
+ *      incidentally is a good match to today's BusyBox.
+ *
+ * Copyright (C) 2000,2001  Larry Doolittle  <larry@doolittle.boa.org>
+ *
+ * Credits:
+ *      The parser routines proper are all original material, first
+ *      written Dec 2000 and Jan 2001 by Larry Doolittle.
+ *      The execution engine, the builtins, and much of the underlying
+ *      support has been adapted from busybox-0.49pre's lash,
+ *      which is Copyright (C) 2000 by Lineo, Inc., and
+ *      written by Erik Andersen <andersen@lineo.com>, <andersee@debian.org>.
+ *      That, in turn, is based in part on ladsh.c, by Michael K. Johnson and
+ *      Erik W. Troan, which they placed in the public domain.  I don't know
+ *      how much of the Johnson/Troan code has survived the repeated rewrites.
+ * Other credits:
+ *      simple_itoa() was lifted from boa-0.93.15
+ *      b_addchr() derived from similar w_addchar function in glibc-2.2
+ *      setup_redirect(), redirect_opt_num(), and big chunks of main()
+ *        and many builtins derived from contributions by Erik Andersen
+ *      miscellaneous bugfixes from Matt Kraai
+ *
+ * There are two big (and related) architecture differences between
+ * this parser and the lash parser.  One is that this version is
+ * actually designed from the ground up to understand nearly all
+ * of the Bourne grammar.  The second, consequential change is that
+ * the parser and input reader have been turned inside out.  Now,
+ * the parser is in control, and asks for input as needed.  The old
+ * way had the input reader in control, and it asked for parsing to
+ * take place as needed.  The new way makes it much easier to properly
+ * handle the recursion implicit in the various substitutions, especially
+ * across continuation lines.
+ *
+ * Bash grammar not implemented: (how many of these were in original sh?)
+ *      $@ (those sure look like weird quoting rules)
+ *      $_
+ *      ! negation operator for pipes
+ *      &> and >& redirection of stdout+stderr
+ *      Brace Expansion
+ *      Tilde Expansion
+ *      fancy forms of Parameter Expansion
+ *      Arithmetic Expansion
+ *      <(list) and >(list) Process Substitution
+ *      reserved words: if, then, elif, else, fi, while, until, for,
+ *                      do, done, case
+ *      Here Documents ( << word )
+ *      Functions
+ * Major bugs:
+ *      job handling woefully incomplete and buggy
+ *      reserved word execution woefully incomplete and buggy
+ *      incomplete reserved word sequence doesn't request more lines of input
+ * to-do:
+ *      port selected bugfixes from post-0.49 busybox lash
+ *      finish implementing reserved words
+ *      handle children going into background
+ *      clean up recognition of null pipes
+ *      have builtin_exec set flag to avoid restore_redirects
+ *      figure out if "echo foo}" is fixable
+ *      check setting of global_argc and global_argv
+ *      control-C handling, probably with longjmp
+ *      VAR=value prefix for simple commands
+ *      follow IFS rules more precisely, including update semantics
+ *      write builtin_eval, builtin_ulimit, builtin_umask
+ *      figure out what to do with backslash-newline
+ *      explain why we use signal instead of sigaction
+ *      propagate syntax errors, die on resource errors?
+ *      continuation lines, both explicit and implicit - done?
+ *      memory leak finding and plugging - done?
+ *      more testing, especially quoting rules and redirection
+ *      maybe change map[] to use 2-bit entries
+ *      (eventually) remove all the printf's
+ *      more integration with BusyBox: prompts, cmdedit, applets
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <ctype.h>     /* isalpha, isdigit */
+#include <unistd.h>    /* getpid */
+#include <stdlib.h>    /* getenv, atoi */
+#include <string.h>    /* strchr */
+#include <stdio.h>     /* popen etc. */
+#include <glob.h>      /* glob, of course */
+#include <stdarg.h>    /* va_list */
+#include <errno.h>
+#include <fcntl.h>
+#include <getopt.h>    /* should be pretty obvious */
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <signal.h>
+
+/* #include <dmalloc.h> */
+/* #define DEBUG_SHELL */
+
+#ifdef BB_VER
+#include "busybox.h"
+#include "cmdedit.h"
+#else
+/* in place of #include "busybox.h"; much of this is indeed
+ * pasted in from the copy of busybox.h in busybox-0.49pre */
+
+#define xrealloc realloc
+#define applet_name "hush"
+#define shell_main main
+
+extern void *xmalloc(size_t size)
+{
+	void *ptr = malloc(size);
+
+	if (!ptr) {
+		fprintf(stderr, "memory_exhausted\n");
+		exit (EXIT_FAILURE);
+	}
+	return ptr;
+}
+
+extern void usage(const char *usage)
+{
+	fprintf(stderr, "Usage: %s\n", usage);
+	exit(EXIT_FAILURE);
+}
+
+static void verror_msg(const char *s, va_list p)
+{
+	fflush(stdout);
+	fprintf(stderr, "%s: ", applet_name);
+	vfprintf(stderr, s, p);
+	fflush(stderr);
+}
+
+extern void error_msg(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	verror_msg(s, p);
+	va_end(p);
+}
+
+extern void error_msg_and_die(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	verror_msg(s, p);
+	va_end(p);
+	exit(EXIT_FAILURE);
+}
+
+static void vperror_msg(const char *s, va_list p)
+{
+	fflush(stdout);
+	fprintf(stderr, "%s: ", applet_name);
+	if (s && *s) {
+		vfprintf(stderr, s, p);
+		fputs(": ", stderr);
+	}
+	fprintf(stderr, "%s\n", strerror(errno));
+	fflush(stderr);
+}
+
+extern void perror_msg(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	vperror_msg(s, p);
+	va_end(p);
+}
+
+extern void perror_msg_and_die(const char *s, ...)
+{
+	va_list p;
+
+	va_start(p, s);
+	vperror_msg(s, p);
+	va_end(p);
+	exit(EXIT_FAILURE);
+}
+
+FILE *xfopen(const char *path, const char *mode)
+{
+	FILE *fp;
+	if ((fp = fopen(path, mode)) == NULL)
+		perror_msg_and_die(path);
+	return fp;
+}
+#endif  /* of busybox.h replacement */
+
+typedef enum {
+	REDIRECT_INPUT     = 1,
+	REDIRECT_OVERWRITE = 2,
+	REDIRECT_APPEND    = 3,
+	REDIRECT_HEREIS    = 4,
+	REDIRECT_IO        = 5
+} redir_type;
+
+/* The descrip member of this structure is only used to make debugging
+ * output pretty */
+struct {int mode; int default_fd; char *descrip;} redir_table[] = {
+	{ 0,                         0, "()" },
+	{ O_RDONLY,                  0, "<"  },
+	{ O_CREAT|O_TRUNC|O_WRONLY,  1, ">"  },
+	{ O_CREAT|O_APPEND|O_WRONLY, 1, ">>" },
+	{ O_RDONLY,                 -1, "<<" },
+	{ O_RDWR,                    1, "<>" }
+};
+
+typedef enum {
+	PIPE_SEQ = 1,
+	PIPE_AND = 2,
+	PIPE_OR  = 3,
+	PIPE_BG  = 4,
+} pipe_style;
+
+/* might eventually control execution */
+typedef enum {
+	RES_NONE  = 0,
+	RES_IF    = 1,
+	RES_THEN  = 2,
+	RES_ELIF  = 3,
+	RES_ELSE  = 4,
+	RES_FI    = 5,
+	RES_FOR   = 6,
+	RES_WHILE = 7,
+	RES_UNTIL = 8,
+	RES_DO    = 9,
+	RES_DONE  = 10,
+	RES_XXXX  = 11
+} reserved_style;
+#define FLAG_END   (1<<RES_NONE)
+#define FLAG_IF    (1<<RES_IF)
+#define FLAG_THEN  (1<<RES_THEN)
+#define FLAG_ELIF  (1<<RES_ELIF)
+#define FLAG_ELSE  (1<<RES_ELSE)
+#define FLAG_FI    (1<<RES_FI)
+#define FLAG_FOR   (1<<RES_FOR)
+#define FLAG_WHILE (1<<RES_WHILE)
+#define FLAG_UNTIL (1<<RES_UNTIL)
+#define FLAG_DO    (1<<RES_DO)
+#define FLAG_DONE  (1<<RES_DONE)
+#define FLAG_START (1<<RES_XXXX)
+
+/* This holds pointers to the various results of parsing */
+struct p_context {
+	struct child_prog *child;
+	struct pipe *list_head;
+	struct pipe *pipe;
+	struct redir_struct *pending_redirect;
+	reserved_style w;
+	int old_flag;				/* for figuring out valid reserved words */
+	struct p_context *stack;
+	/* How about quoting status? */
+};
+
+struct redir_struct {
+	redir_type type;			/* type of redirection */
+	int fd;						/* file descriptor being redirected */
+	int dup;					/* -1, or file descriptor being duplicated */
+	struct redir_struct *next;	/* pointer to the next redirect in the list */ 
+	glob_t word;				/* *word.gl_pathv is the filename */
+};
+
+struct child_prog {
+	pid_t pid;					/* 0 if exited */
+	char **argv;				/* program name and arguments */
+	struct pipe *group;			/* if non-NULL, first in group or subshell */
+	int subshell;				/* flag, non-zero if group must be forked */
+	struct redir_struct *redirects;	/* I/O redirections */
+	glob_t glob_result;			/* result of parameter globbing */
+	int is_stopped;				/* is the program currently running? */
+	struct pipe *family;		/* pointer back to the child's parent pipe */
+};
+
+struct pipe {
+	int jobid;					/* job number */
+	int num_progs;				/* total number of programs in job */
+	int running_progs;			/* number of programs running */
+	char *text;					/* name of job */
+	char *cmdbuf;				/* buffer various argv's point into */
+	pid_t pgrp;					/* process group ID for the job */
+	struct child_prog *progs;	/* array of commands in pipe */
+	struct pipe *next;			/* to track background commands */
+	int stopped_progs;			/* number of programs alive, but stopped */
+	int job_context;			/* bitmask defining current context */
+	pipe_style followup;		/* PIPE_BG, PIPE_SEQ, PIPE_OR, PIPE_AND */
+	reserved_style r_mode;		/* supports if, for, while, until */
+	struct jobset *job_list;
+};
+
+struct jobset {
+	struct pipe *head;			/* head of list of running jobs */
+	struct pipe *fg;			/* current foreground job */
+};
+
+struct close_me {
+	int fd;
+	struct close_me *next;
+};
+
+/* globals, connect us to the outside world
+ * the first three support $?, $#, and $1 */
+char **global_argv;
+unsigned int global_argc;
+unsigned int last_return_code;
+extern char **environ; /* This is in <unistd.h>, but protected with __USE_GNU */
+ 
+/* Variables we export */
+unsigned int shell_context;  /* Used in cmdedit.c to reset the
+                              * context when someone hits ^C */
+
+/* "globals" within this file */
+static char *ifs=NULL;
+static char map[256];
+static int fake_mode=0;
+static int interactive=0;
+static struct close_me *close_me_head = NULL;
+static char *cwd;
+static struct jobset job_list = { NULL, NULL };
+static unsigned int last_bg_pid=0;
+static char *PS1;
+static char *PS2 = "> ";
+
+#define B_CHUNK (100)
+#define B_NOSPAC 1
+#define MAX_LINE 256       /* for cwd */
+#define MAX_READ 256       /* for builtin_read */
+
+typedef struct {
+	char *data;
+	int length;
+	int maxlen;
+	int quote;
+	int nonnull;
+} o_string;
+#define NULL_O_STRING {NULL,0,0,0,0}
+/* used for initialization:
+	o_string foo = NULL_O_STRING; */
+
+/* I can almost use ordinary FILE *.  Is open_memstream() universally
+ * available?  Where is it documented? */
+struct in_str {
+	const char *p;
+	int __promptme;
+	int promptmode;
+	FILE *file;
+	int (*get) (struct in_str *);
+	int (*peek) (struct in_str *);
+};
+#define b_getch(input) ((input)->get(input))
+#define b_peek(input) ((input)->peek(input))
+
+#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
+
+struct built_in_command {
+	char *cmd;					/* name */
+	char *descr;				/* description */
+	int (*function) (struct child_prog *);	/* function ptr */
+};
+
+/* belongs in busybox.h */
+static inline int max(int a, int b) {
+	return (a>b)?a:b;
+}
+
+/* This should be in utility.c */
+#ifdef DEBUG_SHELL
+static void debug_printf(const char *format, ...)
+{
+	va_list args;
+	va_start(args, format);
+	vfprintf(stderr, format, args);
+	va_end(args);
+}
+#else
+static void debug_printf(const char *format, ...) { }
+#endif
+#define final_printf debug_printf
+
+void __syntax(char *file, int line) {
+	fprintf(stderr,"syntax error %s:%d\n",file,line);
+}
+#define syntax() __syntax(__FILE__, __LINE__)
+
+/* Index of subroutines: */
+/*   function prototypes for builtins */
+static int builtin_cd(struct child_prog *child);
+static int builtin_env(struct child_prog *child);
+static int builtin_exec(struct child_prog *child);
+static int builtin_exit(struct child_prog *child);
+static int builtin_export(struct child_prog *child);
+static int builtin_fg_bg(struct child_prog *child);
+static int builtin_help(struct child_prog *child);
+static int builtin_jobs(struct child_prog *child);
+static int builtin_pwd(struct child_prog *child);
+static int builtin_read(struct child_prog *child);
+static int builtin_shift(struct child_prog *child);
+static int builtin_source(struct child_prog *child);
+static int builtin_ulimit(struct child_prog *child);
+static int builtin_umask(struct child_prog *child);
+static int builtin_unset(struct child_prog *child);
+/*   o_string manipulation: */
+static int b_check_space(o_string *o, int len);
+static int b_addchr(o_string *o, int ch);
+static void b_reset(o_string *o);
+static int b_addqchr(o_string *o, int ch, int quote);
+static int b_adduint(o_string *o, unsigned int i);
+/*  in_str manipulations: */
+static int static_get(struct in_str *i);
+static int static_peek(struct in_str *i);
+static int file_get(struct in_str *i);
+static int file_peek(struct in_str *i);
+static void setup_file_in_str(struct in_str *i, FILE *f);
+static void setup_string_in_str(struct in_str *i, const char *s);
+/*  close_me manipulations: */
+static void mark_open(int fd);
+static void mark_closed(int fd);
+static void close_all();
+/*  "run" the final data structures: */
+static char *indenter(int i);
+static int run_list_test(struct pipe *head, int indent);
+static int run_pipe_test(struct pipe *pi, int indent);
+/*  really run the final data structures: */
+static int setup_redirects(struct child_prog *prog, int squirrel[]);
+static int pipe_wait(struct pipe *pi);
+static int run_list_real(struct pipe *pi);
+static void pseudo_exec(struct child_prog *child) __attribute__ ((noreturn));
+static int run_pipe_real(struct pipe *pi);
+/*   extended glob support: */
+static int globhack(const char *src, int flags, glob_t *pglob);
+static int glob_needed(const char *s);
+static int xglob(o_string *dest, int flags, glob_t *pglob);
+/*   data structure manipulation: */
+static int setup_redirect(struct p_context *ctx, int fd, redir_type style, struct in_str *input);
+static void initialize_context(struct p_context *ctx);
+static int done_word(o_string *dest, struct p_context *ctx);
+static int done_command(struct p_context *ctx);
+static int done_pipe(struct p_context *ctx, pipe_style type);
+/*   primary string parsing: */
+static int redirect_dup_num(struct in_str *input);
+static int redirect_opt_num(o_string *o);
+static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end);
+static int parse_group(o_string *dest, struct p_context *ctx, struct in_str *input, int ch);
+static void lookup_param(o_string *dest, struct p_context *ctx, o_string *src);
+static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input);
+static int parse_string(o_string *dest, struct p_context *ctx, const char *src);
+static int parse_stream(o_string *dest, struct p_context *ctx, struct in_str *input0, int end_trigger);
+/*   setup: */
+static int parse_stream_outer(struct in_str *inp);
+static int parse_string_outer(const char *s);
+static int parse_file_outer(FILE *f);
+
+/* Table of built-in functions.  They can be forked or not, depending on
+ * context: within pipes, they fork.  As simple commands, they do not.
+ * When used in non-forking context, they can change global variables
+ * in the parent shell process.  If forked, of course they can not.
+ * For example, 'unset foo | whatever' will parse and run, but foo will
+ * still be set at the end. */
+static struct built_in_command bltins[] = {
+	{"bg", "Resume a job in the background", builtin_fg_bg},
+	{"cd", "Change working directory", builtin_cd},
+	{"env", "Print all environment variables", builtin_env},
+	{"exec", "Exec command, replacing this shell with the exec'd process", builtin_exec},
+	{"exit", "Exit from shell()", builtin_exit},
+	{"export", "Set environment variable", builtin_export},
+	{"fg", "Bring job into the foreground", builtin_fg_bg},
+	{"jobs", "Lists the active jobs", builtin_jobs},
+	{"pwd", "Print current directory", builtin_pwd},
+	{"read", "Input environment variable", builtin_read},
+	{"shift", "Shift positional parameters", builtin_shift},
+	{"ulimit","Controls resource limits", builtin_ulimit},
+	{"umask","Sets file creation mask", builtin_umask},
+	{"unset", "Unset environment variable", builtin_unset},
+	{".", "Source-in and run commands in a file", builtin_source},
+	{"help", "List shell built-in commands", builtin_help},
+	{NULL, NULL, NULL}
+};
+
+/* built-in 'cd <path>' handler */
+static int builtin_cd(struct child_prog *child)
+{
+	char *newdir;
+	if (child->argv[1] == NULL)
+		newdir = getenv("HOME");
+	else
+		newdir = child->argv[1];
+	if (chdir(newdir)) {
+		printf("cd: %s: %s\n", newdir, strerror(errno));
+		return EXIT_FAILURE;
+	}
+	getcwd(cwd, sizeof(char)*MAX_LINE);
+	return EXIT_SUCCESS;
+}
+
+/* built-in 'env' handler */
+static int builtin_env(struct child_prog *dummy)
+{
+	char **e = environ;
+	if (e == NULL) return EXIT_FAILURE;
+	for (; *e; e++) {
+		puts(*e);
+	}
+	return EXIT_SUCCESS;
+}
+
+/* built-in 'exec' handler */
+static int builtin_exec(struct child_prog *child)
+{
+	if (child->argv[1] == NULL)
+		return EXIT_SUCCESS;   /* Really? */
+	child->argv++;
+	pseudo_exec(child);
+	/* never returns */
+}
+
+/* built-in 'exit' handler */
+static int builtin_exit(struct child_prog *child)
+{
+	if (child->argv[1] == NULL)
+		exit(EXIT_SUCCESS);
+	exit (atoi(child->argv[1]));
+}
+
+/* built-in 'export VAR=value' handler */
+static int builtin_export(struct child_prog *child)
+{
+	int res;
+
+	if (child->argv[1] == NULL) {
+		return (builtin_env(child));
+	}
+	res = putenv(child->argv[1]);
+	if (res)
+		fprintf(stderr, "export: %s\n", strerror(errno));
+	return (res);
+}
+
+/* built-in 'fg' and 'bg' handler */
+static int builtin_fg_bg(struct child_prog *child)
+{
+	int i, jobNum;
+	struct pipe *job=NULL;
+	
+	if (!child->argv[1] || child->argv[2]) {
+		error_msg("%s: exactly one argument is expected\n",
+				child->argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	if (sscanf(child->argv[1], "%%%d", &jobNum) != 1) {
+		error_msg("%s: bad argument '%s'\n",
+				child->argv[0], child->argv[1]);
+		return EXIT_FAILURE;
+	}
+
+	for (job = child->family->job_list->head; job; job = job->next) {
+		if (job->jobid == jobNum) {
+			break;
+		}
+	}
+
+	if (!job) {
+		error_msg("%s: unknown job %d\n",
+				child->argv[0], jobNum);
+		return EXIT_FAILURE;
+	}
+
+	if (*child->argv[0] == 'f') {
+		/* Make this job the foreground job */
+		/* suppress messages when run from /linuxrc mag@sysgo.de */
+		if (tcsetpgrp(0, job->pgrp) && errno != ENOTTY)
+			perror_msg("tcsetpgrp"); 
+		child->family->job_list->fg = job;
+	}
+
+	/* Restart the processes in the job */
+	for (i = 0; i < job->num_progs; i++)
+		job->progs[i].is_stopped = 0;
+
+	kill(-job->pgrp, SIGCONT);
+
+	job->stopped_progs = 0;
+	return EXIT_SUCCESS;
+}
+
+/* built-in 'help' handler */
+static int builtin_help(struct child_prog *dummy)
+{
+	struct built_in_command *x;
+
+	printf("\nBuilt-in commands:\n");
+	printf("-------------------\n");
+	for (x = bltins; x->cmd; x++) {
+		if (x->descr==NULL)
+			continue;
+		printf("%s\t%s\n", x->cmd, x->descr);
+	}
+	printf("\n\n");
+	return EXIT_SUCCESS;
+}
+
+/* built-in 'jobs' handler */
+static int builtin_jobs(struct child_prog *child)
+{
+	struct pipe *job;
+	char *status_string;
+
+	for (job = child->family->job_list->head; job; job = job->next) {
+		if (job->running_progs == job->stopped_progs)
+			status_string = "Stopped";
+		else
+			status_string = "Running";
+		printf(JOB_STATUS_FORMAT, job->jobid, status_string, job->text);
+	}
+	return EXIT_SUCCESS;
+}
+
+
+/* built-in 'pwd' handler */
+static int builtin_pwd(struct child_prog *dummy)
+{
+	getcwd(cwd, MAX_LINE);
+	puts(cwd);
+	return EXIT_SUCCESS;
+}
+
+/* built-in 'read VAR' handler */
+static int builtin_read(struct child_prog *child)
+{
+	int res = 0, len, newlen;
+	char *s;
+	char string[MAX_READ];
+
+	if (child->argv[1]) {
+		/* argument (VAR) given: put "VAR=" into buffer */
+		strcpy(string, child->argv[1]);
+		len = strlen(string);
+		string[len++] = '=';
+		string[len]   = '\0';
+		/* XXX would it be better to go through in_str? */
+		fgets(&string[len], sizeof(string) - len, stdin);	/* read string */
+		newlen = strlen(string);
+		if(newlen > len)
+			string[--newlen] = '\0';	/* chomp trailing newline */
+		/*
+		** string should now contain "VAR=<value>"
+		** copy it (putenv() won't do that, so we must make sure
+		** the string resides in a static buffer!)
+		*/
+		res = -1;
+		if((s = strdup(string)))
+			res = putenv(s);
+		if (res)
+			fprintf(stderr, "read: %s\n", strerror(errno));
+	}
+	else
+		fgets(string, sizeof(string), stdin);
+
+	return (res);
+}
+
+/* Built-in 'shift' handler */
+static int builtin_shift(struct child_prog *child)
+{
+	int n=1;
+	if (child->argv[1]) {
+		n=atoi(child->argv[1]);
+	}
+	if (n>=0 && n<global_argc) {
+		/* XXX This probably breaks $0 */
+		global_argc -= n;
+		global_argv += n;
+		return EXIT_SUCCESS;
+	} else {
+		return EXIT_FAILURE;
+	}
+}
+
+/* Built-in '.' handler (read-in and execute commands from file) */
+static int builtin_source(struct child_prog *child)
+{
+	FILE *input;
+	int status;
+
+	if (child->argv[1] == NULL)
+		return EXIT_FAILURE;
+
+	/* XXX search through $PATH is missing */
+	input = fopen(child->argv[1], "r");
+	if (!input) {
+		fprintf(stderr, "Couldn't open file '%s'\n", child->argv[1]);
+		return EXIT_FAILURE;
+	}
+
+	/* Now run the file */
+	/* XXX argv and argc are broken; need to save old global_argv
+	 * (pointer only is OK!) on this stack frame,
+	 * set global_argv=child->argv+1, recurse, and restore. */
+	mark_open(fileno(input));
+	status = parse_file_outer(input);
+	mark_closed(fileno(input));
+	fclose(input);
+	return (status);
+}
+
+static int builtin_ulimit(struct child_prog *child)
+{
+	printf("builtin_ulimit not written\n");
+	return EXIT_FAILURE;
+}
+
+static int builtin_umask(struct child_prog *child)
+{
+	printf("builtin_umask not written\n");
+	return EXIT_FAILURE;
+}
+
+/* built-in 'unset VAR' handler */
+static int builtin_unset(struct child_prog *child)
+{
+	if (child->argv[1] == NULL) {
+		fprintf(stderr, "unset: parameter required.\n");
+		return EXIT_FAILURE;
+	}
+	unsetenv(child->argv[1]);
+	return EXIT_SUCCESS;
+}
+
+static int b_check_space(o_string *o, int len)
+{
+	/* It would be easy to drop a more restrictive policy
+	 * in here, such as setting a maximum string length */
+	if (o->length + len > o->maxlen) {
+		char *old_data = o->data;
+		/* assert (data == NULL || o->maxlen != 0); */
+		o->maxlen += max(2*len, B_CHUNK);
+		o->data = realloc(o->data, 1 + o->maxlen);
+		if (o->data == NULL) {
+			free(old_data);
+		}
+	}
+	return o->data == NULL;
+}
+
+static int b_addchr(o_string *o, int ch)
+{
+	debug_printf("b_addchr: %c %d %p\n", ch, o->length, o);
+	if (b_check_space(o, 1)) return B_NOSPAC;
+	o->data[o->length] = ch;
+	o->length++;
+	o->data[o->length] = '\0';
+	return 0;
+}
+
+static void b_reset(o_string *o)
+{
+	o->length = 0;
+	o->nonnull = 0;
+	if (o->data != NULL) *o->data = '\0';
+}
+
+static void b_free(o_string *o)
+{
+	b_reset(o);
+	if (o->data != NULL) free(o->data);
+	o->data = NULL;
+	o->maxlen = 0;
+}
+
+/* My analysis of quoting semantics tells me that state information
+ * is associated with a destination, not a source.
+ */
+static int b_addqchr(o_string *o, int ch, int quote)
+{
+	if (quote && strchr("*?[\\",ch)) {
+		int rc;
+		rc = b_addchr(o, '\\');
+		if (rc) return rc;
+	}
+	return b_addchr(o, ch);
+}
+
+/* belongs in utility.c */
+char *simple_itoa(unsigned int i)
+{
+	/* 21 digits plus null terminator, good for 64-bit or smaller ints */
+	static char local[22];
+	char *p = &local[21];
+	*p-- = '\0';
+	do {
+		*p-- = '0' + i % 10;
+		i /= 10;
+	} while (i > 0);
+	return p + 1;
+}
+
+static int b_adduint(o_string *o, unsigned int i)
+{
+	int r;
+	char *p = simple_itoa(i);
+	/* no escape checking necessary */
+	do r=b_addchr(o, *p++); while (r==0 && *p);
+	return r;
+}
+
+static int static_get(struct in_str *i)
+{
+	int ch=*i->p++;
+	if (ch=='\0') return EOF;
+	return ch;
+}
+
+static int static_peek(struct in_str *i)
+{
+	return *i->p;
+}
+
+static inline void cmdedit_set_initial_prompt(void)
+{
+#ifdef BB_FEATURE_SH_SIMPLE_PROMPT
+	PS1 = NULL;
+#else
+	PS1 = getenv("PS1");
+	if(PS1==0)
+		PS1 = "\\w \\$ ";
+#endif	
+}
+
+static inline void setup_prompt_string(int promptmode, char **prompt_str)
+{
+#ifdef BB_FEATURE_SH_SIMPLE_PROMPT
+	/* Set up the prompt */
+	if (promptmode == 1) {
+		if (PS1)
+			free(PS1);
+		PS1=xmalloc(strlen(cwd)+4);
+		sprintf(PS1, "%s %s", cwd, ( geteuid() != 0 ) ?  "$ ":"# ");
+		*prompt_str = PS1;
+	} else {
+		*prompt_str = PS2;
+	}
+#else
+	*prompt_str = (promptmode==0)? PS1 : PS2;
+#endif	
+}
+
+static void get_user_input(struct in_str *i)
+{
+	char *prompt_str;
+	static char the_command[MAX_LINE];
+
+	setup_prompt_string(i->promptmode, &prompt_str);
+#ifdef BB_FEATURE_COMMAND_EDITING
+	/*
+	 ** enable command line editing only while a command line
+	 ** is actually being read; otherwise, we'll end up bequeathing
+	 ** atexit() handlers and other unwanted stuff to our
+	 ** child processes (rob@sysgo.de)
+	 */
+	cmdedit_read_input(prompt_str, the_command);
+	cmdedit_terminate();
+#else
+	fputs(prompt_str, stdout);
+	fflush(stdout);
+	the_command[0]=fgetc(i->file);
+	the_command[1]='\0';
+#endif
+	i->p = the_command;
+}
+
+/* This is the magic location that prints prompts 
+ * and gets data back from the user */
+static int file_get(struct in_str *i)
+{
+	int ch;
+
+	ch = 0;
+	/* If there is data waiting, eat it up */
+	if (i->p && *i->p) {
+		ch=*i->p++;
+	} else {
+		/* need to double check i->file because we might be doing something
+		 * more complicated by now, like sourcing or substituting. */
+		if (i->__promptme && interactive && i->file == stdin) {
+			get_user_input(i);
+			i->promptmode=2;
+		}
+		i->__promptme = 0;
+
+		if (i->p && *i->p) {
+			ch=*i->p++;
+		}
+		debug_printf("b_getch: got a %d\n", ch);
+	}
+	if (ch == '\n') i->__promptme=1;
+	return ch;
+}
+
+/* All the callers guarantee this routine will never be
+ * used right after a newline, so prompting is not needed.
+ */
+static int file_peek(struct in_str *i)
+{
+	if (i->p && *i->p) {
+		return *i->p;
+	} else {
+		static char buffer;
+		buffer = fgetc(i->file);
+		i->p = &buffer;
+		debug_printf("b_peek: got a %d\n", *i->p);
+		return *i->p; 
+	}
+}
+
+static void setup_file_in_str(struct in_str *i, FILE *f)
+{
+	i->peek = file_peek;
+	i->get = file_get;
+	i->__promptme=1;
+	i->promptmode=1;
+	i->file = f;
+	i->p = NULL;
+}
+
+static void setup_string_in_str(struct in_str *i, const char *s)
+{
+	i->peek = static_peek;
+	i->get = static_get;
+	i->__promptme=1;
+	i->promptmode=1;
+	i->p = s;
+}
+
+static void mark_open(int fd)
+{
+	struct close_me *new = xmalloc(sizeof(struct close_me));
+	new->fd = fd;
+	new->next = close_me_head;
+	close_me_head = new;
+}
+
+static void mark_closed(int fd)
+{
+	struct close_me *tmp;
+	if (close_me_head == NULL || close_me_head->fd != fd)
+		error_msg_and_die("corrupt close_me");
+	tmp = close_me_head;
+	close_me_head = close_me_head->next;
+	free(tmp);
+}
+
+static void close_all()
+{
+	struct close_me *c;
+	for (c=close_me_head; c; c=c->next) {
+		close(c->fd);
+	}
+	close_me_head = NULL;
+}
+
+/* squirrel != NULL means we squirrel away copies of stdin, stdout,
+ * and stderr if they are redirected. */
+static int setup_redirects(struct child_prog *prog, int squirrel[])
+{
+	int openfd, mode;
+	struct redir_struct *redir;
+
+	for (redir=prog->redirects; redir; redir=redir->next) {
+		if (redir->dup == -1) {
+			mode=redir_table[redir->type].mode;
+			openfd = open(redir->word.gl_pathv[0], mode, 0666);
+			if (openfd < 0) {
+			/* this could get lost if stderr has been redirected, but
+			   bash and ash both lose it as well (though zsh doesn't!) */
+				fprintf(stderr,"error opening %s: %s\n", redir->word.gl_pathv[0],
+					strerror(errno));
+				return 1;
+			}
+		} else {
+			openfd = redir->dup;
+		}
+
+		if (openfd != redir->fd) {
+			if (squirrel && redir->fd < 3) {
+				squirrel[redir->fd] = dup(redir->fd);
+			}
+			dup2(openfd, redir->fd);
+			close(openfd);
+		}
+	}
+	return 0;
+}
+
+static void restore_redirects(int squirrel[])
+{
+	int i, fd;
+	for (i=0; i<3; i++) {
+		fd = squirrel[i];
+		if (fd != -1) {
+			/* No error checking.  I sure wouldn't know what
+			 * to do with an error if I found one! */
+			dup2(fd, i);
+			close(fd);
+		}
+	}
+}
+
+/* XXX this definitely needs some more thought, work, and
+ * cribbing from other shells */
+static int pipe_wait(struct pipe *pi)
+{
+	int rcode=0, i, pid, running, status;
+	running = pi->num_progs;
+	while (running) {
+		pid=waitpid(-1, &status, 0);
+		if (pid < 0) perror_msg_and_die("waitpid");
+		for (i=0; i < pi->num_progs; i++) {
+			if (pi->progs[i].pid == pid) {
+				if (i==pi->num_progs-1) rcode=WEXITSTATUS(status);
+				pi->progs[i].pid = 0;
+				running--;
+				break;
+			}
+		}
+	}
+	return rcode;
+}
+
+/* very simple version for testing */
+static void pseudo_exec(struct child_prog *child)
+{
+	int rcode;
+	struct built_in_command *x;
+	if (child->argv) {
+		/*
+		 * Check if the command matches any of the builtins.
+		 * Depending on context, this might be redundant.  But it's
+		 * easier to waste a few CPU cycles than it is to figure out
+		 * if this is one of those cases.
+		 */
+		for (x = bltins; x->cmd; x++) {
+			if (strcmp(child->argv[0], x->cmd) == 0 ) {
+				debug_printf("builtin exec %s\n", child->argv[0]);
+				exit(x->function(child));
+			}
+		}
+		debug_printf("exec of %s\n",child->argv[0]);
+		execvp(child->argv[0],child->argv);
+		perror("execvp");
+		exit(1);
+	} else if (child->group) {
+		debug_printf("runtime nesting to group\n");
+		interactive=0;    /* crucial!!!! */
+		rcode = run_list_real(child->group);
+		/* OK to leak memory by not calling run_list_test,
+		 * since this process is about to exit */
+		exit(rcode);
+	} else {
+		/* Can happen.  See what bash does with ">foo" by itself. */
+		debug_printf("trying to pseudo_exec null command\n");
+		exit(EXIT_SUCCESS);
+	}
+}
+
+/* run_pipe_real() starts all the jobs, but doesn't wait for anything
+ * to finish.  See pipe_wait().
+ *
+ * return code is normally -1, when the caller has to wait for children
+ * to finish to determine the exit status of the pipe.  If the pipe
+ * is a simple builtin command, however, the action is done by the
+ * time run_pipe_real returns, and the exit code is provided as the
+ * return value.
+ *
+ * The input of the pipe is always stdin, the output is always
+ * stdout.  The outpipe[] mechanism in BusyBox-0.48 lash is bogus,
+ * because it tries to avoid running the command substitution in
+ * subshell, when that is in fact necessary.  The subshell process
+ * now has its stdout directed to the input of the appropriate pipe,
+ * so this routine is noticeably simpler.
+ */
+static int run_pipe_real(struct pipe *pi)
+{
+	int i;
+	int nextin, nextout;
+	int pipefds[2];				/* pipefds[0] is for reading */
+	struct child_prog *child;
+	struct built_in_command *x;
+
+	nextin = 0;
+	pi->pgrp = 0;
+
+	/* Check if this is a simple builtin (not part of a pipe).
+	 * Builtins within pipes have to fork anyway, and are handled in
+	 * pseudo_exec.  "echo foo | read bar" doesn't work on bash, either.
+	 */
+	if (pi->num_progs == 1 && pi->progs[0].argv != NULL) {
+		child = & (pi->progs[0]);
+		if (child->group && ! child->subshell) {
+			int squirrel[] = {-1, -1, -1};
+			int rcode;
+			debug_printf("non-subshell grouping\n");
+			setup_redirects(child, squirrel);
+			/* XXX could we merge code with following builtin case,
+			 * by creating a pseudo builtin that calls run_list_real? */
+			rcode = run_list_real(child->group);
+			restore_redirects(squirrel);
+			return rcode;
+		}
+		for (x = bltins; x->cmd; x++) {
+			if (strcmp(child->argv[0], x->cmd) == 0 ) {
+				int squirrel[] = {-1, -1, -1};
+				int rcode;
+				debug_printf("builtin inline %s\n", child->argv[0]);
+				/* XXX setup_redirects acts on file descriptors, not FILEs.
+				 * This is perfect for work that comes after exec().
+				 * Is it really safe for inline use?  Experimentally,
+				 * things seem to work with glibc. */
+				setup_redirects(child, squirrel);
+				rcode = x->function(child);
+				restore_redirects(squirrel);
+				return rcode;
+			}
+		}
+	}
+
+	for (i = 0; i < pi->num_progs; i++) {
+		child = & (pi->progs[i]);
+
+		/* pipes are inserted between pairs of commands */
+		if ((i + 1) < pi->num_progs) {
+			if (pipe(pipefds)<0) perror_msg_and_die("pipe");
+			nextout = pipefds[1];
+		} else {
+			nextout=1;
+			pipefds[0] = -1;
+		}
+
+		/* XXX test for failed fork()? */
+		if (!(child->pid = fork())) {
+			close_all();
+
+			if (nextin != 0) {
+				dup2(nextin, 0);
+				close(nextin);
+			}
+			if (nextout != 1) {
+				dup2(nextout, 1);
+				close(nextout);
+			}
+			if (pipefds[0]!=-1) {
+				close(pipefds[0]);  /* opposite end of our output pipe */
+			}
+
+			/* Like bash, explicit redirects override pipes,
+			 * and the pipe fd is available for dup'ing. */
+			setup_redirects(child,NULL);
+
+			pseudo_exec(child);
+		}
+		if (interactive) {
+			/* Put our child in the process group whose leader is the
+			 * first process in this pipe. */
+			if (pi->pgrp==0) {
+				pi->pgrp = child->pid;
+			}
+			/* Don't check for errors.  The child may be dead already,
+			 * in which case setpgid returns error code EACCES. */
+			setpgid(child->pid, pi->pgrp);
+		}
+		/* In the non-interactive case, do nothing.  Leave the children
+		 * with the process group that they inherited from us. */
+	
+		if (nextin != 0)
+			close(nextin);
+		if (nextout != 1)
+			close(nextout);
+
+		/* If there isn't another process, nextin is garbage 
+		   but it doesn't matter */
+		nextin = pipefds[0];
+	}
+	return -1;
+}
+
+static int run_list_real(struct pipe *pi)
+{
+	int rcode=0;
+	int if_code=0, next_if_code=0;  /* need double-buffer to handle elif */
+	reserved_style rmode=RES_NONE;
+	for (;pi;pi=pi->next) {
+		rmode = pi->r_mode;
+		debug_printf("rmode=%d  if_code=%d  next_if_code=%d\n", rmode, if_code, next_if_code);
+		if (rmode == RES_THEN || rmode == RES_ELSE) if_code = next_if_code;
+		if (rmode == RES_THEN &&  if_code) continue;
+		if (rmode == RES_ELSE && !if_code) continue;
+		if (rmode == RES_ELIF && !if_code) continue;
+		if (pi->num_progs == 0) break;
+		rcode = run_pipe_real(pi);
+		if (rcode!=-1) {
+			/* We only ran a builtin: rcode was set by the return value
+			 * of run_pipe_real(), and we don't need to wait for anything. */
+		} else if (pi->followup==PIPE_BG) {
+			/* XXX check bash's behavior with nontrivial pipes */
+			/* XXX compute jobid */
+			/* XXX what does bash do with attempts to background builtins? */
+			printf("[%d] %d\n", pi->jobid, pi->pgrp);
+			last_bg_pid = pi->pgrp;
+			rcode = EXIT_SUCCESS;
+		} else {
+			if (interactive) {
+				/* move the new process group into the foreground */
+				/* suppress messages when run from /linuxrc mag@sysgo.de */
+				signal(SIGTTIN, SIG_IGN);
+				signal(SIGTTOU, SIG_IGN);
+				if (tcsetpgrp(0, pi->pgrp) && errno != ENOTTY)
+					perror_msg("tcsetpgrp");
+				rcode = pipe_wait(pi);
+				if (tcsetpgrp(0, getpid()) && errno != ENOTTY)
+					perror_msg("tcsetpgrp");
+				signal(SIGTTIN, SIG_DFL);
+				signal(SIGTTOU, SIG_DFL);
+			} else {
+				rcode = pipe_wait(pi);
+			}
+		}
+		last_return_code=rcode;
+		if ( rmode == RES_IF || rmode == RES_ELIF )
+			next_if_code=rcode;  /* can be overwritten a number of times */
+		if ( (rcode==EXIT_SUCCESS && pi->followup==PIPE_OR) ||
+		     (rcode!=EXIT_SUCCESS && pi->followup==PIPE_AND) )
+			return rcode;  /* XXX broken if list is part of if/then/else */
+	}
+	return rcode;
+}
+
+/* broken, of course, but OK for testing */
+static char *indenter(int i)
+{
+	static char blanks[]="                                    ";
+	return &blanks[sizeof(blanks)-i-1];
+}
+
+/* return code is the exit status of the pipe */
+static int run_pipe_test(struct pipe *pi, int indent)
+{
+	char **p;
+	struct child_prog *child;
+	struct redir_struct *r, *rnext;
+	int a, i, ret_code=0;
+	char *ind = indenter(indent);
+	final_printf("%s run pipe: (pid %d)\n",ind,getpid());
+	for (i=0; i<pi->num_progs; i++) {
+		child = &pi->progs[i];
+		final_printf("%s  command %d:\n",ind,i);
+		if (child->argv) {
+			for (a=0,p=child->argv; *p; a++,p++) {
+				final_printf("%s   argv[%d] = %s\n",ind,a,*p);
+			}
+			globfree(&child->glob_result);
+			child->argv=NULL;
+		} else if (child->group) {
+			final_printf("%s   begin group (subshell:%d)\n",ind, child->subshell);
+			ret_code = run_list_test(child->group,indent+3);
+			final_printf("%s   end group\n",ind);
+		} else {
+			final_printf("%s   (nil)\n",ind);
+		}
+		for (r=child->redirects; r; r=rnext) {
+			final_printf("%s   redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
+			if (r->dup == -1) {
+				final_printf(" %s\n", *r->word.gl_pathv);
+				globfree(&r->word);
+			} else {
+				final_printf("&%d\n", r->dup);
+			}
+			rnext=r->next;
+			free(r);
+		}
+		child->redirects=NULL;
+	}
+	free(pi->progs);   /* children are an array, they get freed all at once */
+	pi->progs=NULL;
+	return ret_code;
+}
+
+static int run_list_test(struct pipe *head, int indent)
+{
+	int rcode=0;   /* if list has no members */
+	struct pipe *pi, *next;
+	char *ind = indenter(indent);
+	for (pi=head; pi; pi=next) {
+		if (pi->num_progs == 0) break;
+		final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
+		rcode = run_pipe_test(pi, indent);
+		final_printf("%s pipe followup code %d\n", ind, pi->followup);
+		next=pi->next;
+		pi->next=NULL;
+		free(pi);
+	}
+	return rcode;	
+}
+
+/* Select which version we will use */
+static int run_list(struct pipe *pi)
+{
+	int rcode=0;
+	if (fake_mode==0) {
+		rcode = run_list_real(pi);
+	} 
+	/* run_list_test has the side effect of clearing memory
+	 * In the long run that function can be merged with run_list_real,
+	 * but doing that now would hobble the debugging effort. */
+	run_list_test(pi,0);
+	return rcode;
+}
+
+/* The API for glob is arguably broken.  This routine pushes a non-matching
+ * string into the output structure, removing non-backslashed backslashes.
+ * If someone can prove me wrong, by performing this function within the
+ * original glob(3) api, feel free to rewrite this routine into oblivion.
+ * Return code (0 vs. GLOB_NOSPACE) matches glob(3).
+ * XXX broken if the last character is '\\', check that before calling.
+ */
+static int globhack(const char *src, int flags, glob_t *pglob)
+{
+	int cnt, pathc;
+	const char *s;
+	char *dest;
+	for (cnt=1, s=src; *s; s++) {
+		if (*s == '\\') s++;
+		cnt++;
+	}
+	dest = malloc(cnt);
+	if (!dest) return GLOB_NOSPACE;
+	if (!(flags & GLOB_APPEND)) {
+		pglob->gl_pathv=NULL;
+		pglob->gl_pathc=0;
+		pglob->gl_offs=0;
+		pglob->gl_offs=0;
+	}
+	pathc = ++pglob->gl_pathc;
+	pglob->gl_pathv = realloc(pglob->gl_pathv, (pathc+1)*sizeof(*pglob->gl_pathv));
+	if (pglob->gl_pathv == NULL) return GLOB_NOSPACE;
+	pglob->gl_pathv[pathc-1]=dest;
+	pglob->gl_pathv[pathc]=NULL;
+	for (s=src; *s; s++, dest++) {
+		if (*s == '\\') s++;
+		*dest = *s;
+	}
+	*dest='\0';
+	return 0;
+}
+
+/* XXX broken if the last character is '\\', check that before calling */
+static int glob_needed(const char *s)
+{
+	for (; *s; s++) {
+		if (*s == '\\') s++;
+		if (strchr("*[?",*s)) return 1;
+	}
+	return 0;
+}
+
+#if 0
+static void globprint(glob_t *pglob)
+{
+	int i;
+	debug_printf("glob_t at %p:\n", pglob);
+	debug_printf("  gl_pathc=%d  gl_pathv=%p  gl_offs=%d  gl_flags=%d\n",
+		pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
+	for (i=0; i<pglob->gl_pathc; i++)
+		debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
+			pglob->gl_pathv[i], pglob->gl_pathv[i]);
+}
+#endif
+
+static int xglob(o_string *dest, int flags, glob_t *pglob)
+{
+	int gr;
+
+ 	/* short-circuit for null word */
+	/* we can code this better when the debug_printf's are gone */
+ 	if (dest->length == 0) {
+ 		if (dest->nonnull) {
+ 			/* bash man page calls this an "explicit" null */
+ 			gr = globhack(dest->data, flags, pglob);
+ 			debug_printf("globhack returned %d\n",gr);
+ 		} else {
+			return 0;
+		}
+ 	} else if (glob_needed(dest->data)) {
+		gr = glob(dest->data, flags, NULL, pglob);
+		debug_printf("glob returned %d\n",gr);
+		if (gr == GLOB_NOMATCH) {
+			/* quote removal, or more accurately, backslash removal */
+			gr = globhack(dest->data, flags, pglob);
+			debug_printf("globhack returned %d\n",gr);
+		}
+	} else {
+		gr = globhack(dest->data, flags, pglob);
+		debug_printf("globhack returned %d\n",gr);
+	}
+	if (gr == GLOB_NOSPACE) {
+		fprintf(stderr,"out of memory during glob\n");
+		exit(1);
+	}
+	if (gr != 0) { /* GLOB_ABORTED ? */
+		fprintf(stderr,"glob(3) error %d\n",gr);
+	}
+	/* globprint(glob_target); */
+	return gr;
+}
+
+/* the src parameter allows us to peek forward to a possible &n syntax
+ * for file descriptor duplication, e.g., "2>&1".
+ * Return code is 0 normally, 1 if a syntax error is detected in src.
+ * Resource errors (in xmalloc) cause the process to exit */
+static int setup_redirect(struct p_context *ctx, int fd, redir_type style,
+	struct in_str *input)
+{
+	struct child_prog *child=ctx->child;
+	struct redir_struct *redir = child->redirects;
+	struct redir_struct *last_redir=NULL;
+
+	/* Create a new redir_struct and drop it onto the end of the linked list */
+	while(redir) {
+		last_redir=redir;
+		redir=redir->next;
+	}
+	redir = xmalloc(sizeof(struct redir_struct));
+	redir->next=NULL;
+	if (last_redir) {
+		last_redir->next=redir;
+	} else {
+		child->redirects=redir;
+	}
+
+	redir->type=style;
+	redir->fd= (fd==-1) ? redir_table[style].default_fd : fd ;
+
+	debug_printf("Redirect type %d%s\n", redir->fd, redir_table[style].descrip);
+
+	/* Check for a '2>&1' type redirect */ 
+	redir->dup = redirect_dup_num(input);
+	if (redir->dup == -2) return 1;  /* syntax error */
+	if (redir->dup != -1) {
+		/* Erik had a check here that the file descriptor in question
+		 * is legit; I postpone that to "run time" */
+		debug_printf("Duplicating redirect '%d>&%d'\n", redir->fd, redir->dup);
+	} else {
+		/* We do _not_ try to open the file that src points to,
+		 * since we need to return and let src be expanded first.
+		 * Set ctx->pending_redirect, so we know what to do at the
+		 * end of the next parsed word.
+		 */
+		ctx->pending_redirect = redir;
+	}
+	return 0;
+}
+
+struct pipe *new_pipe(void) {
+	struct pipe *pi;
+	pi = xmalloc(sizeof(struct pipe));
+	pi->num_progs = 0;
+	pi->progs = NULL;
+	pi->next = NULL;
+	pi->followup = 0;  /* invalid */
+	return pi;
+}
+
+static void initialize_context(struct p_context *ctx)
+{
+	ctx->pipe=NULL;
+	ctx->pending_redirect=NULL;
+	ctx->child=NULL;
+	ctx->list_head=new_pipe();
+	ctx->pipe=ctx->list_head;
+	ctx->w=RES_NONE;
+	ctx->stack=NULL;
+	done_command(ctx);   /* creates the memory for working child */
+}
+
+/* normal return is 0
+ * if a reserved word is found, and processed, return 1
+ * should handle if, then, elif, else, fi, for, while, until, do, done.
+ * case, function, and select are obnoxious, save those for later.
+ */
+int reserved_word(o_string *dest, struct p_context *ctx)
+{
+	struct reserved_combo {
+		char *literal;
+		int code;
+		long flag;
+	};
+	/* Mostly a list of accepted follow-up reserved words.
+	 * FLAG_END means we are done with the sequence, and are ready
+	 * to turn the compound list into a command.
+	 * FLAG_START means the word must start a new compound list.
+	 */
+	static struct reserved_combo reserved_list[] = {
+		{ "if",    RES_IF,    FLAG_THEN | FLAG_START },
+		{ "then",  RES_THEN,  FLAG_ELIF | FLAG_ELSE | FLAG_FI },
+		{ "elif",  RES_ELIF,  FLAG_THEN },
+		{ "else",  RES_ELSE,  FLAG_FI   },
+		{ "fi",    RES_FI,    FLAG_END  },
+		{ "for",   RES_FOR,   FLAG_DO   | FLAG_START },
+		{ "while", RES_WHILE, FLAG_DO   | FLAG_START },
+		{ "until", RES_UNTIL, FLAG_DO   | FLAG_START },
+		{ "do",    RES_DO,    FLAG_DONE },
+		{ "done",  RES_DONE,  FLAG_END  }
+	};
+	struct reserved_combo *r;
+	for (r=reserved_list;
+#define NRES sizeof(reserved_list)/sizeof(struct reserved_combo)
+		r<reserved_list+NRES; r++) {
+		if (strcmp(dest->data, r->literal) == 0) {
+			debug_printf("found reserved word %s, code %d\n",r->literal,r->code);
+			if (r->flag & FLAG_START) {
+				struct p_context *new = xmalloc(sizeof(struct p_context));
+				debug_printf("push stack\n");
+				*new = *ctx;   /* physical copy */
+				initialize_context(ctx);
+				ctx->stack=new;
+			} else if ( ctx->w == RES_NONE || ! (ctx->old_flag & (1<<r->code))) {
+				syntax();  /* XXX how do we get out? */
+			}
+			ctx->w=r->code;
+			ctx->old_flag = r->flag;
+			if (ctx->old_flag & FLAG_END) {
+				struct p_context *old;
+				debug_printf("pop stack\n");
+				old = ctx->stack;
+				old->child->group = ctx->list_head;
+				*ctx = *old;   /* physical copy */
+				free(old);
+				ctx->w=RES_NONE;
+			}
+			b_reset (dest);
+			return 1;
+		}
+	}
+	return 0;
+}
+
+/* normal return is 0.
+ * Syntax or xglob errors return 1. */
+static int done_word(o_string *dest, struct p_context *ctx)
+{
+	struct child_prog *child=ctx->child;
+	glob_t *glob_target;
+	int gr, flags = 0;
+
+	debug_printf("done_word: %s %p\n", dest->data, child);
+	if (dest->length == 0 && !dest->nonnull) {
+		debug_printf("  true null, ignored\n");
+		return 0;
+	}
+	if (ctx->pending_redirect) {
+		glob_target = &ctx->pending_redirect->word;
+	} else {
+		if (child->group) {
+			syntax();
+			return 1;  /* syntax error, groups and arglists don't mix */
+		}
+		if (!child->argv) {
+			debug_printf("checking %s for reserved-ness\n",dest->data);
+			if (reserved_word(dest,ctx)) return 0;
+		}
+		glob_target = &child->glob_result;
+ 		if (child->argv) flags |= GLOB_APPEND;
+	}
+	gr = xglob(dest, flags, glob_target);
+	if (gr != 0) return 1;
+
+	b_reset(dest);
+	if (ctx->pending_redirect) {
+		ctx->pending_redirect=NULL;
+		if (glob_target->gl_pathc != 1) {
+			fprintf(stderr, "ambiguous redirect\n");
+			return 1;
+		}
+	} else {
+		child->argv = glob_target->gl_pathv;
+	}
+	return 0;
+}
+
+/* The only possible error here is out of memory, in which case
+ * xmalloc exits. */
+static int done_command(struct p_context *ctx)
+{
+	/* The child is really already in the pipe structure, so
+	 * advance the pipe counter and make a new, null child.
+	 * Only real trickiness here is that the uncommitted
+	 * child structure, to which ctx->child points, is not
+	 * counted in pi->num_progs. */
+	struct pipe *pi=ctx->pipe;
+	struct child_prog *prog=ctx->child;
+
+	if (prog && prog->group == NULL
+	         && prog->argv == NULL
+	         && prog->redirects == NULL) {
+		debug_printf("done_command: skipping null command\n");
+		return 0;
+	} else if (prog) {
+		pi->num_progs++;
+		debug_printf("done_command: num_progs incremented to %d\n",pi->num_progs);
+	} else {
+		debug_printf("done_command: initializing\n");
+	}
+	pi->progs = xrealloc(pi->progs, sizeof(*pi->progs) * (pi->num_progs+1));
+
+	prog = pi->progs + pi->num_progs;
+	prog->redirects = NULL;
+	prog->argv = NULL;
+	prog->is_stopped = 0;
+	prog->group = NULL;
+	prog->glob_result.gl_pathv = NULL;
+	prog->family = pi;
+
+	ctx->child=prog;
+	/* but ctx->pipe and ctx->list_head remain unchanged */
+	return 0;
+}
+
+static int done_pipe(struct p_context *ctx, pipe_style type)
+{
+	struct pipe *new_p;
+	done_command(ctx);  /* implicit closure of previous command */
+	debug_printf("done_pipe, type %d\n", type);
+	ctx->pipe->followup = type;
+	ctx->pipe->r_mode = ctx->w;
+	new_p=new_pipe();
+	ctx->pipe->next = new_p;
+	ctx->pipe = new_p;
+	ctx->child = NULL;
+	done_command(ctx);  /* set up new pipe to accept commands */
+	return 0;
+}
+
+/* peek ahead in the in_str to find out if we have a "&n" construct,
+ * as in "2>&1", that represents duplicating a file descriptor.
+ * returns either -2 (syntax error), -1 (no &), or the number found.
+ */
+static int redirect_dup_num(struct in_str *input)
+{
+	int ch, d=0, ok=0;
+	ch = b_peek(input);
+	if (ch != '&') return -1;
+
+	b_getch(input);  /* get the & */
+	while (ch=b_peek(input),isdigit(ch)) {
+		d = d*10+(ch-'0');
+		ok=1;
+		b_getch(input);
+	}
+	if (ok) return d;
+
+	fprintf(stderr, "ambiguous redirect\n");
+	return -2;
+}
+
+/* If a redirect is immediately preceded by a number, that number is
+ * supposed to tell which file descriptor to redirect.  This routine
+ * looks for such preceding numbers.  In an ideal world this routine
+ * needs to handle all the following classes of redirects...
+ *     echo 2>foo     # redirects fd  2 to file "foo", nothing passed to echo
+ *     echo 49>foo    # redirects fd 49 to file "foo", nothing passed to echo
+ *     echo -2>foo    # redirects fd  1 to file "foo",    "-2" passed to echo
+ *     echo 49x>foo   # redirects fd  1 to file "foo",   "49x" passed to echo
+ * A -1 output from this program means no valid number was found, so the
+ * caller should use the appropriate default for this redirection.
+ */
+static int redirect_opt_num(o_string *o)
+{
+	int num;
+
+	if (o->length==0) return -1;
+	for(num=0; num<o->length; num++) {
+		if (!isdigit(*(o->data+num))) {
+			return -1;
+		}
+	}
+	/* reuse num (and save an int) */
+	num=atoi(o->data);
+	b_reset(o);
+	return num;
+}
+
+FILE *generate_stream_from_list(struct pipe *head)
+{
+	FILE *pf;
+#if 1
+	int pid, channel[2];
+	if (pipe(channel)<0) perror_msg_and_die("pipe");
+	pid=fork();
+	if (pid<0) {
+		perror_msg_and_die("fork");
+	} else if (pid==0) {
+		close(channel[0]);
+		if (channel[1] != 1) {
+			dup2(channel[1],1);
+			close(channel[1]);
+		}
+#if 0
+#define SURROGATE "surrogate response"
+		write(1,SURROGATE,sizeof(SURROGATE));
+		exit(run_list(head));
+#else
+		exit(run_list_real(head));   /* leaks memory */
+#endif
+	}
+	debug_printf("forked child %d\n",pid);
+	close(channel[1]);
+	pf = fdopen(channel[0],"r");
+	debug_printf("pipe on FILE *%p\n",pf);
+#else
+	run_list_test(head,0);
+	pf=popen("echo surrogate response","r");
+	debug_printf("started fake pipe on FILE *%p\n",pf);
+#endif
+	return pf;
+}
+
+/* this version hacked for testing purposes */
+/* return code is exit status of the process that is run. */
+static int process_command_subs(o_string *dest, struct p_context *ctx, struct in_str *input, int subst_end)
+{
+	int retcode;
+	o_string result=NULL_O_STRING;
+	struct p_context inner;
+	FILE *p;
+	struct in_str pipe_str;
+	initialize_context(&inner);
+
+	/* recursion to generate command */
+	retcode = parse_stream(&result, &inner, input, subst_end);
+	if (retcode != 0) return retcode;  /* syntax error or EOF */
+	done_word(&result, &inner);
+	done_pipe(&inner, PIPE_SEQ);
+	b_free(&result);
+
+	p=generate_stream_from_list(inner.list_head);
+	if (p==NULL) return 1;
+	mark_open(fileno(p));
+	setup_file_in_str(&pipe_str, p);
+
+	/* now send results of command back into original context */
+	retcode = parse_stream(dest, ctx, &pipe_str, '\0');
+	/* XXX In case of a syntax error, should we try to kill the child?
+	 * That would be tough to do right, so just read until EOF. */
+	if (retcode == 1) {
+		while (b_getch(&pipe_str)!=EOF) { /* discard */ };
+	}
+
+	debug_printf("done reading from pipe, pclose()ing\n");
+	/* This is the step that wait()s for the child.  Should be pretty
+	 * safe, since we just read an EOF from its stdout.  We could try
+	 * to better, by using wait(), and keeping track of background jobs
+	 * at the same time.  That would be a lot of work, and contrary
+	 * to the KISS philosophy of this program. */
+	mark_closed(fileno(p));
+	retcode=pclose(p);
+	debug_printf("pclosed, retcode=%d\n",retcode);
+	/* XXX this process fails to trim a single trailing newline */
+	return retcode;
+}
+
+static int parse_group(o_string *dest, struct p_context *ctx,
+	struct in_str *input, int ch)
+{
+	int rcode, endch=0;
+	struct p_context sub;
+	struct child_prog *child = ctx->child;
+	if (child->argv) {
+		syntax();
+		return 1;  /* syntax error, groups and arglists don't mix */
+	}
+	initialize_context(&sub);
+	switch(ch) {
+		case '(': endch=')'; child->subshell=1; break;
+		case '{': endch='}'; break;
+		default: syntax();   /* really logic error */
+	}
+	rcode=parse_stream(dest,&sub,input,endch);
+	done_word(dest,&sub); /* finish off the final word in the subcontext */
+	done_pipe(&sub, PIPE_SEQ);  /* and the final command there, too */
+	child->group = sub.list_head;
+	return rcode;
+	/* child remains "open", available for possible redirects */
+}
+
+/* basically useful version until someone wants to get fancier,
+ * see the bash man page under "Parameter Expansion" */
+static void lookup_param(o_string *dest, struct p_context *ctx, o_string *src)
+{
+	const char *p=NULL;
+	if (src->data) p = getenv(src->data);
+	if (p) parse_string(dest, ctx, p);   /* recursion */
+	b_free(src);
+}
+
+/* return code: 0 for OK, 1 for syntax error */
+static int handle_dollar(o_string *dest, struct p_context *ctx, struct in_str *input)
+{
+	int i, advance=0;
+	o_string alt=NULL_O_STRING;
+	char sep[]=" ";
+	int ch = input->peek(input);  /* first character after the $ */
+	debug_printf("handle_dollar: ch=%c\n",ch);
+	if (isalpha(ch)) {
+		while(ch=b_peek(input),isalnum(ch) || ch=='_') {
+			b_getch(input);
+			b_addchr(&alt,ch);
+		}
+		lookup_param(dest, ctx, &alt);
+	} else if (isdigit(ch)) {
+		i = ch-'0';  /* XXX is $0 special? */
+		if (i<global_argc) {
+			parse_string(dest, ctx, global_argv[i]); /* recursion */
+		}
+		advance = 1;
+	} else switch (ch) {
+		case '$':
+			b_adduint(dest,getpid());
+			advance = 1;
+			break;
+		case '!':
+			if (last_bg_pid > 0) b_adduint(dest, last_bg_pid);
+			advance = 1;
+			break;
+		case '?':
+			b_adduint(dest,last_return_code);
+			advance = 1;
+			break;
+		case '#':
+			b_adduint(dest,global_argc ? global_argc-1 : 0);
+			advance = 1;
+			break;
+		case '{':
+			b_getch(input);
+			/* XXX maybe someone will try to escape the '}' */
+			while(ch=b_getch(input),ch!=EOF && ch!='}') {
+				b_addchr(&alt,ch);
+			}
+			if (ch != '}') {
+				syntax();
+				return 1;
+			}
+			lookup_param(dest, ctx, &alt);
+			break;
+		case '(':
+			process_command_subs(dest, ctx, input, ')');
+			break;
+		case '*':
+			sep[0]=ifs[0];
+			for (i=1; i<global_argc; i++) {
+				parse_string(dest, ctx, global_argv[i]);
+				if (i+1 < global_argc) parse_string(dest, ctx, sep);
+			}
+			break;
+		case '@':
+		case '-':
+		case '_':
+			/* still unhandled, but should be eventually */
+			fprintf(stderr,"unhandled syntax: $%c\n",ch);
+			return 1;
+			break;
+		default:
+			b_addqchr(dest,'$',dest->quote);
+	}
+	/* Eat the character if the flag was set.  If the compiler
+	 * is smart enough, we could substitute "b_getch(input);"
+	 * for all the "advance = 1;" above, and also end up with
+	 * a nice size-optimized program.  Hah!  That'll be the day.
+	 */
+	if (advance) b_getch(input);
+	return 0;
+}
+
+int parse_string(o_string *dest, struct p_context *ctx, const char *src)
+{
+	struct in_str foo;
+	setup_string_in_str(&foo, src);
+	return parse_stream(dest, ctx, &foo, '\0');
+}
+
+/* return code is 0 for normal exit, 1 for syntax error */
+int parse_stream(o_string *dest, struct p_context *ctx,
+	struct in_str *input, int end_trigger)
+{
+	unsigned int ch, m;
+	int redir_fd;
+	redir_type redir_style;
+	int next;
+
+	/* Only double-quote state is handled in the state variable dest->quote.
+	 * A single-quote triggers a bypass of the main loop until its mate is
+	 * found.  When recursing, quote state is passed in via dest->quote. */
+
+	debug_printf("parse_stream, end_trigger=%d\n",end_trigger);
+	while ((ch=b_getch(input))!=EOF) {
+		m = map[ch];
+		next = (ch == '\n') ? 0 : b_peek(input);
+		debug_printf("parse_stream: ch=%c (%d) m=%d quote=%d\n",
+			ch,ch,m,dest->quote);
+		if (m==0 || ((m==1 || m==2) && dest->quote)) {
+			b_addqchr(dest, ch, dest->quote);
+		} else if (ch == end_trigger && !dest->quote) {
+			debug_printf("leaving parse_stream\n");
+			return 0;
+		} else if (m==2 && !dest->quote) {  /* IFS */
+			done_word(dest, ctx);
+#if 0
+			if (ch=='\n') {
+				/* Yahoo!  Time to run with it! */
+				done_pipe(ctx,PIPE_SEQ);
+				run_list(ctx->list_head);
+				initialize_context(ctx);
+			}
+#endif
+		} else switch (ch) {
+		case '#':
+			if (dest->length == 0 && !dest->quote) {
+				while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
+			} else {
+				b_addqchr(dest, ch, dest->quote);
+			}
+			break;
+		case '\\':
+			if (next == EOF) {
+				syntax();
+				return 1;
+			}
+			b_addqchr(dest, '\\', dest->quote);
+			b_addqchr(dest, b_getch(input), dest->quote);
+			break;
+		case '$':
+			if (handle_dollar(dest, ctx, input)!=0) return 1;
+			break;
+		case '\'':
+			dest->nonnull = 1;
+			while(ch=b_getch(input),ch!=EOF && ch!='\'') {
+				b_addchr(dest,ch);
+			}
+			if (ch==EOF) {
+				syntax();
+				return 1;
+			}
+			break;
+		case '"':
+			dest->nonnull = 1;
+			dest->quote = !dest->quote;
+			break;
+		case '`':
+			process_command_subs(dest, ctx, input, '`');
+			break;
+		case '>':
+			redir_fd = redirect_opt_num(dest);
+			done_word(dest, ctx);
+			redir_style=REDIRECT_OVERWRITE;
+			if (next == '>') {
+				redir_style=REDIRECT_APPEND;
+				b_getch(input);
+			} else if (next == '(') {
+				syntax();   /* until we support >(list) Process Substitution */
+				return 1;
+			}
+			setup_redirect(ctx, redir_fd, redir_style, input);
+			break;
+		case '<':
+			redir_fd = redirect_opt_num(dest);
+			done_word(dest, ctx);
+			redir_style=REDIRECT_INPUT;
+			if (next == '<') {
+				redir_style=REDIRECT_HEREIS;
+				b_getch(input);
+			} else if (next == '>') {
+				redir_style=REDIRECT_IO;
+				b_getch(input);
+			} else if (next == '(') {
+				syntax();   /* until we support <(list) Process Substitution */
+				return 1;
+			}
+			setup_redirect(ctx, redir_fd, redir_style, input);
+			break;
+		case ';':
+			done_word(dest, ctx);
+			done_pipe(ctx,PIPE_SEQ);
+			break;
+		case '&':
+			done_word(dest, ctx);
+			if (next=='&') {
+				b_getch(input);
+				done_pipe(ctx,PIPE_AND);
+			} else {
+				done_pipe(ctx,PIPE_BG);
+			}
+			break;
+		case '|':
+			done_word(dest, ctx);
+			if (next=='|') {
+				b_getch(input);
+				done_pipe(ctx,PIPE_OR);
+			} else {
+				/* we could pick up a file descriptor choice here
+				 * with redirect_opt_num(), but bash doesn't do it.
+				 * "echo foo 2| cat" yields "foo 2". */
+				done_command(ctx);
+			}
+			break;
+		case '(':
+		case '{':
+			if (parse_group(dest, ctx, input, ch)!=0) return 1;
+			break;
+		case ')':
+		case '}':
+			syntax();   /* Proper use of this character caught by end_trigger */
+			return 1;
+			break;
+		default:
+			syntax();   /* this is really an internal logic error */
+			return 1;
+		}
+	}
+	/* complain if quote?  No, maybe we just finished a command substitution
+	 * that was quoted.  Example:
+	 * $ echo "`cat foo` plus more" 
+	 * and we just got the EOF generated by the subshell that ran "cat foo"
+	 * The only real complaint is if we got an EOF when end_trigger != '\0',
+	 * that is, we were really supposed to get end_trigger, and never got
+	 * one before the EOF.  Can't use the standard "syntax error" return code,
+	 * so that parse_stream_outer can distinguish the EOF and exit smoothly. */
+	if (end_trigger != '\0') return -1;
+	return 0;
+}
+
+void mapset(const unsigned char *set, int code)
+{
+	const unsigned char *s;
+	for (s=set; *s; s++) map[*s] = code;
+}
+
+void update_ifs_map(void)
+{
+	/* char *ifs and char map[256] are both globals. */
+	ifs = getenv("IFS");
+	if (ifs == NULL) ifs=" \t\n";
+	/* Precompute a list of 'flow through' behavior so it can be treated
+	 * quickly up front.  Computation is necessary because of IFS.
+	 * Special case handling of IFS == " \t\n" is not implemented.
+	 * The map[] array only really needs two bits each, and on most machines
+	 * that would be faster because of the reduced L1 cache footprint.
+	 */
+	memset(map,0,256);        /* most characters flow through always */
+	mapset("\\$'\"`", 3);     /* never flow through */
+	mapset("<>;&|(){}#", 1);  /* flow through if quoted */
+	mapset(ifs, 2);           /* also flow through if quoted */
+}
+
+/* most recursion does not come through here, the exeception is
+ * from builtin_source() */
+int parse_stream_outer(struct in_str *inp)
+{
+
+	struct p_context ctx;
+	o_string temp=NULL_O_STRING;
+	int rcode;
+	do {
+		initialize_context(&ctx);
+		update_ifs_map();
+		inp->promptmode=1;
+		rcode = parse_stream(&temp, &ctx, inp, '\n');
+		done_word(&temp, &ctx);
+		done_pipe(&ctx,PIPE_SEQ);
+		run_list(ctx.list_head);
+	} while (rcode != -1);   /* loop on syntax errors, return on EOF */
+	return 0;
+}
+
+static int parse_string_outer(const char *s)
+{
+	struct in_str input;
+	setup_string_in_str(&input, s);
+	return parse_stream_outer(&input);
+}
+
+static int parse_file_outer(FILE *f)
+{
+	int rcode;
+	struct in_str input;
+	setup_file_in_str(&input, f);
+	rcode = parse_stream_outer(&input);
+	return rcode;
+}
+
+int shell_main(int argc, char **argv)
+{
+	int opt;
+	FILE *input;
+
+	/* XXX what should these be while sourcing /etc/profile? */
+	global_argc = argc;
+	global_argv = argv;
+
+	if (argv[0] && argv[0][0] == '-') {
+		debug_printf("\nsourcing /etc/profile\n");
+		input = xfopen("/etc/profile", "r");
+		mark_open(fileno(input));
+		parse_file_outer(input);
+		mark_closed(fileno(input));
+		fclose(input);
+	}
+	input=stdin;
+	
+	/* initialize the cwd -- this is never freed...*/
+	cwd = xgetcwd(0);
+#ifdef BB_FEATURE_COMMAND_EDITING
+	cmdedit_set_initial_prompt();
+#else
+	PS1 = NULL;
+#endif
+	
+	while ((opt = getopt(argc, argv, "c:xif")) > 0) {
+		switch (opt) {
+			case 'c':
+				{
+					global_argv = argv+optind;
+					global_argc = argc-optind;
+					opt = parse_string_outer(optarg);
+					exit(opt);
+				}
+				break;
+			case 'i':
+				interactive++;
+				break;
+			case 'f':
+				fake_mode++;
+				break;
+			default:
+				fprintf(stderr, "Usage: sh [FILE]...\n"
+						"   or: sh -c command [args]...\n\n");
+				exit(EXIT_FAILURE);
+		}
+	}
+	/* A shell is interactive if the `-i' flag was given, or if all of
+	 * the following conditions are met:
+	 *	  no -c command
+	 *    no arguments remaining or the -s flag given
+	 *    standard input is a terminal
+	 *    standard output is a terminal
+	 *    Refer to Posix.2, the description of the `sh' utility. */
+	if (argv[optind]==NULL && input==stdin &&
+			isatty(fileno(stdin)) && isatty(fileno(stdout))) {
+		interactive++;
+	}
+	
+	if (interactive) {
+		/* Looks like they want an interactive shell */
+		fprintf(stdout, "\nhush -- the humble shell v0.01 (testing)\n\n");
+		exit(parse_file_outer(stdin));
+	}
+	debug_printf("\ninteractive=%d\n", interactive);
+
+	debug_printf("\nrunning script '%s'\n", argv[optind]);
+	global_argv = argv+optind;
+	global_argc = argc-optind;
+	input = xfopen(argv[optind], "r");
+	opt = parse_file_outer(input);
+
+#ifdef BB_FEATURE_CLEAN_UP
+	fclose(input.file);
+#endif
+
+	return(opt);
+}