char rcsid[] = "$Header: perly.c,v 3.0.1.10 91/01/11 18:22:48 lwall Locked $\nPatch level: ###\n";
/*
 *    Copyright (c) 1989, Larry Wall
 *
 *    You may distribute under the terms of the GNU General Public License
 *    as specified in the README file that comes with the perl 3.0 kit.
 *
 * $Log:	perly.c,v $
 * Revision 3.0.1.10  91/01/11  18:22:48  lwall
 * patch42: added -0 option
 * patch42: ANSIfied the stat mode checking
 * patch42: executables for multiple versions may now coexist
 * 
 * Revision 3.0.1.9  90/11/10  01:53:26  lwall
 * patch38: random cleanup
 * patch38: more msdos/os2 upgrades
 * patch38: references to $0 produced core dumps
 * patch38: added hooks for unexec()
 * 
 * Revision 3.0.1.8  90/10/16  10:14:20  lwall
 * patch29: *foo now prints as *package'foo
 * patch29: added waitpid
 * patch29: the debugger now understands packages and evals
 * patch29: added -M, -A and -C
 * patch29: -w sometimes printed spurious warnings about ARGV and ENV
 * patch29: require "./foo" didn't work right
 * patch29: require error messages referred to wrong file
 * 
 * Revision 3.0.1.7  90/08/13  22:22:22  lwall
 * patch28: defined(@array) and defined(%array) didn't work right
 * 
 * Revision 3.0.1.6  90/08/09  04:55:50  lwall
 * patch19: added -x switch to extract script from input trash
 * patch19: Added -c switch to do compilation only
 * patch19: added numeric interpretation of $]
 * patch19: added require operator
 * patch19: $0, %ENV, @ARGV were wrong in dumped script
 * patch19: . is now explicitly in @INC (and last)
 * 
 * Revision 3.0.1.5  90/03/27  16:20:57  lwall
 * patch16: MSDOS support
 * patch16: do FILE inside eval blows up
 * 
 * Revision 3.0.1.4  90/02/28  18:06:41  lwall
 * patch9: perl can now start up other interpreters scripts
 * patch9: nested evals clobbered their longjmp environment
 * patch9: eval could mistakenly return undef in array context
 * 
 * Revision 3.0.1.3  89/12/21  20:15:41  lwall
 * patch7: ANSI strerror() is now supported
 * patch7: errno may now be a macro with an lvalue
 * patch7: allowed setuid scripts to have a space after #!
 * 
 * Revision 3.0.1.2  89/11/17  15:34:42  lwall
 * patch5: fixed possible confusion about current effective gid
 * 
 * Revision 3.0.1.1  89/11/11  04:50:04  lwall
 * patch2: moved yydebug to where its type didn't matter
 * 
 * Revision 3.0  89/10/18  15:22:21  lwall
 * 3.0 baseline
 * 
 */

#include "EXTERN.h"
#include "perl.h"
#include "perly.h"
#include "patchlevel.h"

static char *moreswitches PROTO((char *));
static char *cddir;
static bool minus_c;
static char patchlevel[6];

int
main(argc,argv)
register int argc;
register char **argv;
{
    register STR *str;
    register char *s;
    char *val;
    bool dosearch = FALSE;

    origargv = argv;
    origargc = argc;
    sprintf(patchlevel,"%3.3s%2.2d", rcsid+19, PATCHLEVEL);

    (void)sprintf(index(rcsid,'#'), "%d\n", PATCHLEVEL);
    linestr = Str_new(65,80);
    str_nset(linestr,"",0);
    str = str_make("",0);		/* first used for -I flags */
    curstash = defstash = hnew(0);
    curstname = str_make("main",4);
    stab_xhash(stabent("_main",TRUE)) = defstash;
    defstash->tbl_name = "main";
    incstab = hadd(aadd(stabent("INC",TRUE)));
    incstab->str_pok |= SP_MULTI;
    for (argc--,argv++; argc > 0; argc--,argv++) {
	if (argv[0][0] != '-' || !argv[0][1])
	    break;
	s = argv[0]+1;
      reswitch:
	switch (*s) {
	case '0':
	case 'a':
	case 'c':
	case 'd':
	case 'D':
	case 'i':
	case 'n':
	case 'p':
	case 'u':
	case 'U':
	case 'v':
	case 'w':
	    if ((s = moreswitches(s)) != Nullch)
		goto reswitch;
	    break;

	case 'e':
#ifdef TAINT
	    if (euid != uid || egid != gid)
		fatal("No -e allowed in setuid scripts");
#endif
	    if (!e_fp) {
	        e_tmpname = savestr(TMPPATH);
		(void)mktemp(e_tmpname);
		e_fp = fopen(e_tmpname,"w");
		if (!e_fp)
		    fatal("Cannot open temporary file");
	    }
	    if (argv[1]) {
		fputs(argv[1],e_fp);
		argc--,argv++;
	    }
	    (void)putc('\n', e_fp);
	    break;
	case 'I':
#ifdef TAINT
	    if (euid != uid || egid != gid)
		fatal("No -I allowed in setuid scripts");
#endif
	    str_cat(str,"-");
	    str_cat(str,s);
	    str_cat(str," ");
	    if (*++s) {
		(void)apush(stab_array(incstab),str_make(s,0));
	    }
	    else if (argv[1]) {
		(void)apush(stab_array(incstab),str_make(argv[1],0));
		str_cat(str,argv[1]);
		argc--,argv++;
		str_cat(str," ");
	    }
	    break;
	case 'P':
#ifdef TAINT
	    if (euid != uid || egid != gid)
		fatal("No -P allowed in setuid scripts");
#endif
	    preprocess = TRUE;
	    s++;
	    goto reswitch;
	case 's':
#ifdef TAINT
	    if (euid != uid || egid != gid)
		fatal("No -s allowed in setuid scripts");
#endif
	    doswitches = TRUE;
	    s++;
	    goto reswitch;
	case 'S':
	    dosearch = TRUE;
	    s++;
	    goto reswitch;
	case 'x':
	    doextract = TRUE;
	    s++;
	    if (*s)
		cddir = savestr(s);
	    break;
	case '-':
	    argc--,argv++;
	    goto switch_end;
	case 0:
	    break;
	default:
	    fatal("Unrecognized switch: -%s",s);
	}
    }
  switch_end:
    if (e_fp) {
	(void)fclose(e_fp);
	argc++,argv--;
	argv[0] = e_tmpname;
    }
#ifndef PRIVLIB
#define PRIVLIB "Lib:Perl"
#endif
    (void)apush(stab_array(incstab),str_make(PRIVLIB,0));
    (void)apush(stab_array(incstab),str_make("@",1));

    str_set(&str_no,No);
    str_set(&str_yes,Yes);

    /* open script */

    if (argv[0] == Nullch)
	argv[0] = "-";
#if 0
    if (dosearch && !index(argv[0], '/') && (s = getenv("PATH")) != Nullch) {
	char *xfound = Nullch, *xfailed = Nullch;
	int len;

	bufend = s + strlen(s);
	while (*s) {
#ifndef MSDOS
	    s = cpytill(tokenbuf,s,bufend,':',&len);
#else
	    for (len = 0; *s && *s != ';'; tokenbuf[len++] = *s++);
	    tokenbuf[len] = '\0';
#endif
	    if (*s)
		s++;
#ifndef MSDOS
	    if (len && tokenbuf[len-1] != '/')
#else
	    if (len && tokenbuf[len-1] != '\\')
#endif
		(void)strcat(tokenbuf+len,"/");
	    (void)strcat(tokenbuf+len,argv[0]);
#ifdef DEBUGGING
	    if (debug & 1)
		fprintf(stderr,"Looking for %s\n",tokenbuf);
#endif
	    if (stat(tokenbuf,&statbuf) < 0)		/* not there? */
		continue;
	    if (statbuf.st_type == T_FILE) {
		xfound = tokenbuf;              /* bingo! */
		break;
	    }
	    if (!xfailed)
		xfailed = savestr(tokenbuf);
	}
	if (!xfound)
	    fatal("Can't execute %s", xfailed ? xfailed : argv[0] );
	if (xfailed)
	    Safefree(xfailed);
	argv[0] = savestr(xfound);
    }
#endif

    origfilename = savestr(argv[0]);
    curcmd->c_filestab = fstab(origfilename);
    if (strEQ(origfilename,"-"))
	argv[0] = "";

    if (preprocess) {
    	FILE *fp1 = (*argv[0] ? fopen(argv[0],"r") : stdin);
    	FILE *fp2;
    	char *tmp = mktemp("CppTmp");
	int ch;
	int nl = 1;
	char line_buf[10];
	int i;
	
	if (fp1 == Nullfp) {
	    _kernel_oserror *ep;
	    if (ep)
		fatal("Can't open perl script \"%s\": %s\n",
		      origfilename, ep->errmess);
	    else
		fatal("Can't open perl script \"%s\"\n", origfilename);
	}

	if (tmp == Nullch || (fp2 = fopen(tmp,"w")) == Nullfp)
	    fatal("Can't open temporary file for preprocessing\n");

	while ((ch = getc(fp1)) != EOF)
	{
	    if (ch == '\n')
	    {
		nl = 1;
		putc(ch,fp2);
		continue;
	    }

	    if (!nl || ch != '#')
	    {
		nl = 0;
		putc(ch,fp2);
		continue;
	    }

	    /* We have a '#' at the start of the line */

	    /* Skip space */
	    for (ch = getc(fp1); ch == ' ' || ch == '\t'; ch = getc(fp1))
		;

	    /* get the command */
	    for (i = 0; i < 10;)
	    {
		line_buf[i++] = ch;

		ch = getc(fp1);
		if (ch == EOF || isspace(ch))
		    break;
	    }

	    /* Check that it's the correct length for a command */
	    if (i != 2 && (i < 4 || i > 7))
		goto skip_line;

	    /* Check for preprocessor keywords */
	    switch (line_buf[0])
	    {
	    case 'i':
		if (i == 2 && strnEQ(line_buf,"if",2))
		    goto keep_line;
		if (i == 5 && strnEQ(line_buf,"ifdef",5))
		    goto keep_line;
		if (i == 6 && strnEQ(line_buf,"ifndef",6))
		    goto keep_line;
		if (i == 7 && strnEQ(line_buf,"include",7))
		    goto keep_line;
		goto skip_line;
	    case 'e':
		if (i == 4 && strnEQ(line_buf,"else",4))
		    goto keep_line;
		if (i == 5 && strnEQ(line_buf,"endif",5))
		    goto keep_line;
		goto skip_line;
	    case 'd':
		if (i == 6 && strnEQ(line_buf,"define",6))
		    goto keep_line;
		goto skip_line;
	    default:
		goto skip_line;
	    }
keep_line:
	    /* Keep this line */
	    putc('#',fp2);
	    fwrite(line_buf,i,1,fp2);

	    while (ch != EOF)
	    {
		putc(ch,fp2);
		if (ch == '\n')
		    break;
		ch = getc(fp1);
	    }

	    nl = 1;

skip_line:
	    /* Skip the rest of the line */
	    while (ch != EOF && ch != '\n')
		ch = getc(fp1);

	    nl = 1;
	}

	fclose(fp1);
	fclose(fp2);

	str_cat(str,"-I");
	str_cat(str,PRIVLIB);

	(void)sprintf(buf, "cc -E -C -pcc %s - < %s 2>Null:",
		      str_get(str), tmp);
	rsfp = mypopen(buf,"r");

	remove(tmp);
	free(tmp);
    }
    else if (!*argv[0])
	rsfp = stdin;
    else
	rsfp = fopen(argv[0],"r");

    if (rsfp == Nullfp) {
	_kernel_oserror *ep;
	if (ep)
	    fatal("Can't open perl script \"%s\": %s\n",
		  stab_val(curcmd->c_filestab)->str_ptr, ep->errmess);
	else
	    fatal("Can't open perl script \"%s\"\n",
		  stab_val(curcmd->c_filestab)->str_ptr);
    }
    str_free(str);		/* free -I directories */

    /* skip forward in input to the real script? */

    while (doextract) {
	if ((s = str_gets(linestr, rsfp, 0)) == Nullch)
	    fatal("No Perl script found in input\n");
	if (*s == '#' && s[1] == '!' && instr(s,"perl")) {
	    ungetc('\n',rsfp);		/* to keep line count right */
	    doextract = FALSE;
	    if ((s = instr(s,"perl -")) != Nullch) {
		s += 6;
		while ((s = moreswitches(s)) != Nullch) ;
	    }
	    if (cddir && chdir(cddir) < 0)
		fatal("Can't chdir to %s",cddir);
	}
    }

    defstab = stabent("_",TRUE);

    if (perldb) {
	debstash = hnew(0);
	stab_xhash(stabent("_DB",TRUE)) = debstash;
	curstash = debstash;
	dbargs = stab_xarray(aadd((tmpstab = stabent("args",TRUE))));
	tmpstab->str_pok |= SP_MULTI;
	dbargs->ary_flags = 0;
	subname = str_make("main",4);
	DBstab = stabent("DB",TRUE);
	DBstab->str_pok |= SP_MULTI;
	DBline = stabent("dbline",TRUE);
	DBline->str_pok |= SP_MULTI;
	DBsub = hadd(tmpstab = stabent("sub",TRUE));
	tmpstab->str_pok |= SP_MULTI;
	DBsingle = stab_val((tmpstab = stabent("single",TRUE)));
	tmpstab->str_pok |= SP_MULTI;
	DBtrace = stab_val((tmpstab = stabent("trace",TRUE)));
	tmpstab->str_pok |= SP_MULTI;
	DBsignal = stab_val((tmpstab = stabent("signal",TRUE)));
	tmpstab->str_pok |= SP_MULTI;
	curstash = defstash;
    }

    /* init tokener */

    bufend = bufptr = str_get(linestr);

    savestack = anew(Nullstab);		/* for saving non-local values */
    stack = anew(Nullstab);		/* for saving non-local values */
    stack->ary_flags = 0;		/* not a real array */
    afill(stack,63); afill(stack,-1);	/* preextend stack */
    afill(savestack,63); afill(savestack,-1);

    /* now parse the script */

    error_count = 0;
    if (yyparse() || error_count) {
	if (minus_c)
	    fatal("%s had compilation errors.\n", origfilename);
	else {
	    fatal("Execution of %s aborted due to compilation errors.\n",
		origfilename);
	}
    }

    New(50,loop_stack,128,struct loop);
#ifdef DEBUGGING
    if (debug) {
	New(51,debname,128,char);
	New(52,debdelim,128,char);
    }
#endif
    curstash = defstash;

    preprocess = FALSE;
    if (e_fp) {
	e_fp = Nullfp;
	(void)UNLINK(e_tmpname);
    }

    /* initialize everything that won't change if we undump */

    if ((sigstab = stabent("SIG",allstabs)) != Nullstab) {
	sigstab->str_pok |= SP_MULTI;
	(void)hadd(sigstab);
    }

    magicalize("!#?^~=-%123456789.+&*,\\/[|`':>\024");
    userinit();		/* in case linked C routines want magical variables */

    amperstab = stabent("&",allstabs);
    leftstab = stabent("`",allstabs);
    rightstab = stabent("'",allstabs);
    sawampersand = (amperstab || leftstab || rightstab);
    if ((tmpstab = stabent(":",allstabs)) != Nullstab)
	str_set(STAB_STR(tmpstab),chopset);
    if ((tmpstab = stabent("\024",allstabs)) != Nullstab)
	os_starttime(&basetime);

    /* these aren't necessarily magical */
    if ((tmpstab = stabent(";",allstabs)) != Nullstab)
	str_set(STAB_STR(tmpstab),"\034");
    if ((tmpstab = stabent("]",allstabs)) != Nullstab) {
	str = STAB_STR(tmpstab);
	str_set(str,rcsid);
	str->str_u.str_nval = atof(patchlevel);
	str->str_nok = 1;
    }
    str_nset(stab_val(stabent("\"", TRUE)), " ", 1);

    stdinstab = stabent("STDIN",TRUE);
    stdinstab->str_pok |= SP_MULTI;
    stab_io(stdinstab) = stio_new();
    stab_io(stdinstab)->ifp = stdin;
    stab_io(stdinstab)->type = '-';
    tmpstab = stabent("stdin",TRUE);
    stab_io(tmpstab) = stab_io(stdinstab);
    tmpstab->str_pok |= SP_MULTI;

    tmpstab = stabent("STDOUT",TRUE);
    tmpstab->str_pok |= SP_MULTI;
    stab_io(tmpstab) = stio_new();
    stab_io(tmpstab)->ofp = stab_io(tmpstab)->ifp = stdout;
    stab_io(tmpstab)->type = '-';
    defoutstab = tmpstab;
    tmpstab = stabent("stdout",TRUE);
    stab_io(tmpstab) = stab_io(defoutstab);
    tmpstab->str_pok |= SP_MULTI;

    curoutstab = stabent("STDERR",TRUE);
    curoutstab->str_pok |= SP_MULTI;
    stab_io(curoutstab) = stio_new();
    stab_io(curoutstab)->ofp = stab_io(curoutstab)->ifp = stderr;
    stab_io(curoutstab)->type = '-';
    tmpstab = stabent("stderr",TRUE);
    stab_io(tmpstab) = stab_io(curoutstab);
    tmpstab->str_pok |= SP_MULTI;
    curoutstab = defoutstab;		/* switch back to STDOUT */

    statname = Str_new(66,0);		/* last filename we did stat on */

    err_no = 0;				/* Clear the error record */
    strcpy(err_mess, "No error");

    argc--,argv++;	/* skip name of script */
    if (doswitches) {
	for (; argc > 0 && **argv == '-'; argc--,argv++) {
	    if (argv[0][1] == '-') {
		argc--,argv++;
		break;
	    }
	    str_numset(stab_val(stabent(argv[0]+1,TRUE)),(double)1.0);
	}
    }
#ifdef TAINT
    tainted = 1;
#endif
    if ((tmpstab = stabent("0",allstabs)) != Nullstab)
	str_set(stab_val(tmpstab),origfilename);
    if ((argvstab = stabent("ARGV",allstabs)) != Nullstab) {
	argvstab->str_pok |= SP_MULTI;
	(void)aadd(argvstab);
	aclear(stab_array(argvstab));
	for (; argc > 0; argc--,argv++) {
	    (void)apush(stab_array(argvstab),str_make(argv[0],0));
	}
    }

#ifdef TAINT
    (void) stabent("ENV",TRUE);		/* must test PATH and IFS */
#endif

    if ((envstab = stabent("ENV",allstabs)) != Nullstab) {
	envstab->str_pok |= SP_MULTI;
	(void)hadd(envstab);
	hclear(stab_hash(envstab), FALSE);
	for (s = getenvar("*",&val); s; s = getenvar(0,&val)) {
	    int len = strlen(s);
	    str = str_make(val,0);
	    str_magic(str, envstab, 'E', s, len);
	    (void)hstore(stab_hash(envstab), s, len, str, 0);
	}
    }

#ifdef TAINT
    tainted = 0;
#endif

    if ((tmpstab = stabent("<",allstabs)) != Nullstab)
	str_set(STAB_STR(tmpstab),getcwd(1,0));

    if (dowarn) {
	stab_check('A','Z');
	stab_check('a','z');
    }

    if (setjmp(top_env))	/* sets goto_targ on longjump */
	loop_ptr = -1;		/* start label stack again */

#ifdef DEBUGGING
    if (debug & 1024)
	dump_all();
    if (debug)
	fprintf(stderr,"\nEXECUTING...\n\n");
#endif

    if (minus_c) {
	fprintf(stderr,"%s syntax OK\n", origfilename);
	exit(0);
    }

    /* do it */

    (void) cmd_exec(main_root,G_SCALAR,-1);

    if (goto_targ)
	fatal("Can't find label \"%s\"--aborting",goto_targ);

    return 0;
}

void
magicalize(list)
register char *list;
{
    char sym[2];

    sym[1] = '\0';
    while ((*sym = *list++) != 0)
	magicname(sym, Nullch, 0);
}

void
magicname(sym,name,namlen)
char *sym;
char *name;
int namlen;
{
    register STAB *stab;

    if ((stab = stabent(sym,allstabs)) != Nullstab) {
	stab_flags(stab) = SF_VMAGIC;
	str_magic(stab_val(stab), stab, 0, name, namlen);
    }
}

/* this routine is in perly.c by virtue of being sort of an alternate main() */

int
do_eval(str,optype,stash,gimme,arglast)
STR *str;
int optype;
HASH *stash;
int gimme;
int *arglast;
{
    STR **st = stack->ary_array;
    int retval;
    CMD *myroot;
    ARRAY *ar;
    int i;
    CMD * VOLATILE oldcurcmd = curcmd;
    VOLATILE int oldtmps_base = tmps_base;
    VOLATILE int oldsave = savestack->ary_fill;
    VOLATILE int oldperldb = perldb;
    SPAT * VOLATILE oldspat = curspat;
    static char *last_eval = Nullch;
    static CMD *last_root = Nullcmd;
    VOLATILE int sp = arglast[0];
    char *specfilename;
    char *tmpfilename;

    tmps_base = tmps_max;
    if (curstash != stash) {
	(void)savehptr(&curstash);
	curstash = stash;
    }
    str_set(stab_val(stabent("@",TRUE)),"");
    if (curcmd->c_line == 0)		/* don't debug debugger... */
	perldb = FALSE;
    curcmd = &compiling;
    if (optype == O_EVAL) {		/* normal eval */
	curcmd->c_filestab = fstab("(eval)");
	curcmd->c_line = 1;
	str_sset(linestr,str);
	str_cat(linestr,";");		/* be kind to them */
    }
    else {
	if (last_root && !in_eval) {
	    Safefree(last_eval);
	    cmd_free(last_root);
	    last_root = Nullcmd;
	}
	specfilename = str_get(str);
	str_set(linestr,"");
	if (optype == O_REQUIRE && &str_undef !=
	  hfetch(stab_hash(incstab), specfilename, strlen(specfilename), 0)) {
	    curcmd = oldcurcmd;
	    tmps_base = oldtmps_base;
	    st[++sp] = &str_yes;
	    perldb = oldperldb;
	    return sp;
	}
	tmpfilename = savestr(specfilename);
	if (index("$%&\\@", *tmpfilename))
	    rsfp = fopen(tmpfilename,"r");
	else {
	    ar = stab_array(incstab);
	    for (i = 0; i <= ar->ary_fill; i++) {
		(void)sprintf(buf,"%s.%s",
		  str_get(afetch(ar,i,TRUE)), specfilename);
		rsfp = fopen(buf,"r");
		if (rsfp) {
		    char *s = buf;

		    if (*s == '@' && s[1] == '.')
			s += 2;
		    Safefree(tmpfilename);
		    tmpfilename = savestr(s);
		    break;
		}
	    }
	}
	curcmd->c_filestab = fstab(tmpfilename);
	Safefree(tmpfilename);
	if (!rsfp) {
	    curcmd = oldcurcmd;
	    tmps_base = oldtmps_base;
	    if (optype == O_REQUIRE) {
		sprintf(tokenbuf,"Can't locate %s in @INC", specfilename);
		fatal("%s",tokenbuf);
	    }
	    if (gimme != G_ARRAY)
		st[++sp] = &str_undef;
	    perldb = oldperldb;
	    return sp;
	}
	curcmd->c_line = 0;
    }
    in_eval++;
    oldoldbufptr = oldbufptr = bufptr = str_get(linestr);
    bufend = bufptr + linestr->str_cur;
    if (++loop_ptr >= loop_max) {
	loop_max += 128;
	Renew(loop_stack, loop_max, struct loop);
    }
    loop_stack[loop_ptr].loop_label = "_EVAL_";
    loop_stack[loop_ptr].loop_sp = sp;
#ifdef DEBUGGING
    if (debug & 4) {
	deb("(Pushing label #%d _EVAL_)\n", loop_ptr);
    }
#endif
    if (setjmp(loop_stack[loop_ptr].loop_env)) {
	retval = 1;
	last_root = Nullcmd;
    }
    else {
	error_count = 0;
	if (rsfp) {
	    retval = yyparse();
	    retval |= error_count;
	}
	else if (last_root && *bufptr == *last_eval && strEQ(bufptr,last_eval)){
	    retval = 0;
	    eval_root = last_root;	/* no point in reparsing */
	}
	else if (in_eval == 1) {
	    if (last_root) {
		Safefree(last_eval);
		cmd_free(last_root);
	    }
	    last_eval = savestr(bufptr);
	    last_root = Nullcmd;
	    retval = yyparse();
	    retval |= error_count;
	    if (!retval)
		last_root = eval_root;
	}
	else
	    retval = yyparse();
    }
    myroot = eval_root;		/* in case cmd_exec does another eval! */

    if (retval) {
	st = stack->ary_array;
	sp = arglast[0];
	if (gimme != G_ARRAY)
	    st[++sp] = &str_undef;
	last_root = Nullcmd;	/* can't free on error, for some reason */
	if (rsfp) {
	    fclose(rsfp);
	    rsfp = 0;
	}
    }
    else {
	sp = cmd_exec(eval_root,gimme,sp);
	st = stack->ary_array;
	for (i = arglast[0] + 1; i <= sp; i++)
	    st[i] = str_static(st[i]);
				/* if we don't save result, free zaps it */
	if (in_eval != 1 && myroot != last_root)
	    cmd_free(myroot);
    }

    perldb = oldperldb;
    in_eval--;
#ifdef DEBUGGING
    if (debug & 4) {
	char *tmps = loop_stack[loop_ptr].loop_label;
	deb("(Popping label #%d %s)\n",loop_ptr,
	    tmps ? tmps : "" );
    }
#endif
    loop_ptr--;
    tmps_base = oldtmps_base;
    curspat = oldspat;
    if (savestack->ary_fill > oldsave)	/* let them use local() */
	restorelist(oldsave);

    if (optype != O_EVAL) {
	if (retval) {
	    if (optype == O_REQUIRE)
		fatal("%s", str_get(stab_val(stabent("@",TRUE))));
	}
	else {
	    curcmd = oldcurcmd;
	    if (gimme == G_SCALAR ? str_true(st[sp]) : sp > arglast[0]) {
		(void)hstore(stab_hash(incstab), specfilename,
		  strlen(specfilename), str_smake(stab_val(curcmd->c_filestab)),
		      0 );
	    }
	    else if (optype == O_REQUIRE)
		fatal("%s did not return a true value", specfilename);
	}
    }
    curcmd = oldcurcmd;
    return sp;
}

/* This routine handles any switches that can be given during run */

static char *
moreswitches(s)
char *s;
{
    switch (*s) {
    case '0':
	record_separator = 0;
	if (s[1] == '0' && !isdigit(s[2]))
	    rslen = 0;
	while (*s >= '0' && *s <= '7') {
	    record_separator <<= 3;
	    record_separator += *s++ & 7;
	}
	return s;
    case 'a':
	minus_a = TRUE;
	s++;
	return s;
    case 'c':
	minus_c = TRUE;
	s++;
	return s;
    case 'd':
#ifdef TAINT
	if (euid != uid || egid != gid)
	    fatal("No -d allowed in setuid scripts");
#endif
	perldb = TRUE;
	s++;
	return s;
    case 'D':
#ifdef DEBUGGING
#ifdef TAINT
	if (euid != uid || egid != gid)
	    fatal("No -D allowed in setuid scripts");
#endif
	debug = atoi(s+1);
#else
	warn("Recompile perl with -DDEBUGGING to use -D switch\n");
#endif
	break;
    case 'i':
	inplace = savestr(s+1);
	for (s = inplace; *s && !isspace(*s); s++) ;
	*s = '\0';
	argvoutstab = stabent("ARGVOUT",TRUE);
	break;
    case 'I':
#ifdef TAINT
	if (euid != uid || egid != gid)
	    fatal("No -I allowed in setuid scripts");
#endif
	if (*++s) {
	    (void)apush(stab_array(incstab),str_make(s,0));
	}
	else
	    fatal("No space allowed after -I");
	break;
    case 'n':
	minus_n = TRUE;
	s++;
	return s;
    case 'p':
	minus_p = TRUE;
	s++;
	return s;
    case 'u':
	/* do_undump = TRUE; */
	s++;
	return s;
    case 'U':
	unsafe = TRUE;
	s++;
	return s;
    case 'v':
	fputs("\nThis is perl, version 3.0\n\n",stdout);
	fputs(rcsid,stdout);
	fputs("\nCopyright (c) 1989, 1990, Larry Wall\n",stdout);
	fputs("Archimedes port Copyright (c) 1990, Paul Moore\n", stdout);
	fputs("\n\
Perl may be copied only under the terms of the GNU General Public License,\n\
a copy of which can be found with the Perl 3.0 distribution kit.\n",stdout);
	exit(0);
    case 'w':
	dowarn = TRUE;
	s++;
	return s;
    case ' ':
    case '\n':
    case '\t':
	break;
    default:
	fatal("Switch meaningless after -x: -%s",s);
    }
    return Nullch;
}
