X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pp_sys.c;h=b241a0e9312690e15b34019f0522c9ea8cdd778b;hb=a385c4e7bdc7cbc9f50e4f013b7a373e7450e199;hp=d92541255e14a3d1d2e78afbf5cdfbea9a3e0f7d;hpb=0322a713a271eb2b52432d4aa82e700773da354c;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/pp_sys.c b/pp_sys.c
index d925412..b241a0e 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -104,11 +104,6 @@ extern int h_errno;
 #  endif
 #endif
 
-/* Put this after #includes because fork and vfork prototypes may conflict. */
-#ifndef HAS_VFORK
-#   define vfork fork
-#endif
-
 #ifdef HAS_CHSIZE
 # ifdef my_chsize  /* Probably #defined to Perl_my_chsize in embed.h */
 #   undef my_chsize
@@ -394,15 +389,6 @@ PP(pp_glob)
     return result;
 }
 
-#if 0		/* XXX never used! */
-PP(pp_indread)
-{
-    STRLEN n_a;
-    PL_last_in_gv = gv_fetchpv(SvPVx(GvSV((GV*)(*PL_stack_sp--)), n_a), TRUE,SVt_PVIO);
-    return do_readline();
-}
-#endif
-
 PP(pp_rcatline)
 {
     PL_last_in_gv = cGVOP_gv;
@@ -482,7 +468,7 @@ PP(pp_die)
 		    sv_setsv(error,*PL_stack_sp--);
 		}
 	    }
-	    DIE(aTHX_ Nullch);
+	    DIE(aTHX_ Nullformat);
 	}
 	else {
 	    if (SvPOK(error) && SvCUR(error))
@@ -506,6 +492,7 @@ PP(pp_open)
     dTARGET;
     GV *gv;
     SV *sv;
+    IO *io;
     char *tmps;
     STRLEN len;
     MAGIC *mg;
@@ -514,13 +501,13 @@ PP(pp_open)
     gv = (GV *)*++MARK;
     if (!isGV(gv))
 	DIE(aTHX_ PL_no_usym, "filehandle");
-    if (GvIOp(gv))
+    if ((io = GvIOp(gv)))
 	IoFLAGS(GvIOp(gv)) &= ~IOf_UNTAINT;
 
-    if ((mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (io && (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar))) {
 	/* Method's args are same as ours ... */
 	/* ... except handle is replaced by the object */
-	*MARK-- = SvTIED_obj((SV*)gv, mg);
+	*MARK-- = SvTIED_obj((SV*)io, mg);
 	PUSHMARK(MARK);
 	PUTBACK;
 	ENTER;
@@ -553,6 +540,7 @@ PP(pp_close)
 {
     dSP;
     GV *gv;
+    IO *io;
     MAGIC *mg;
 
     if (MAXARG == 0)
@@ -560,9 +548,11 @@ PP(pp_close)
     else
 	gv = (GV*)POPs;
 
-    if ((mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	PUTBACK;
 	ENTER;
 	call_method("CLOSE", G_SCALAR);
@@ -577,8 +567,8 @@ PP(pp_close)
 
 PP(pp_pipe_op)
 {
-    dSP;
 #ifdef HAS_PIPE
+    dSP;
     GV *rgv;
     GV *wgv;
     register IO *rstio;
@@ -642,9 +632,11 @@ PP(pp_fileno)
 	RETPUSHUNDEF;
     gv = (GV*)POPs;
 
-    if (gv && (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	PUTBACK;
 	ENTER;
 	call_method("FILENO", G_SCALAR);
@@ -669,9 +661,9 @@ PP(pp_fileno)
 PP(pp_umask)
 {
     dSP; dTARGET;
+#ifdef HAS_UMASK
     Mode_t anum;
 
-#ifdef HAS_UMASK
     if (MAXARG < 1) {
 	anum = PerlLIO_umask(0);
 	(void)PerlLIO_umask(anum);
@@ -699,8 +691,6 @@ PP(pp_binmode)
     PerlIO *fp;
     MAGIC *mg;
     SV *discp = Nullsv;
-    STRLEN len  = 0;
-    char *names = NULL;
 
     if (MAXARG < 1)
 	RETPUSHUNDEF;
@@ -710,9 +700,11 @@ PP(pp_binmode)
 
     gv = (GV*)POPs;
 
-    if (gv && (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	if (discp)
 	    XPUSHs(discp);
 	PUTBACK;
@@ -730,10 +722,6 @@ PP(pp_binmode)
         RETPUSHUNDEF;
     }
 
-    if (discp) {
-	names = SvPV(discp,len);
-    }
-
     if (PerlIO_binmode(aTHX_ fp,IoTYPE(io),mode_from_discipline(discp),
                        (discp) ? SvPV_nolen(discp) : Nullch))
 	RETPUSHYES;
@@ -759,18 +747,24 @@ PP(pp_tie)
     switch(SvTYPE(varsv)) {
 	case SVt_PVHV:
 	    methname = "TIEHASH";
+	    HvEITER((HV *)varsv) = Null(HE *);
 	    break;
 	case SVt_PVAV:
 	    methname = "TIEARRAY";
 	    break;
 	case SVt_PVGV:
-#ifdef GV_SHARED_CHECK
-	    if (GvSHARED((GV*)varsv)) {
-                Perl_croak(aTHX_ "Attempt to tie shared GV");
+#ifdef GV_UNIQUE_CHECK
+	    if (GvUNIQUE((GV*)varsv)) {
+                Perl_croak(aTHX_ "Attempt to tie unique GV");
 	    }
 #endif
 	    methname = "TIEHANDLE";
 	    how = PERL_MAGIC_tiedscalar;
+	    /* For tied filehandles, we apply tiedscalar magic to the IO
+	       slot of the GP rather than the GV itself. AMS 20010812 */
+	    if (!GvIOp(varsv))
+		GvIOp(varsv) = newIO();
+	    varsv = (SV *)GvIOp(varsv);
 	    break;
 	default:
 	    methname = "TIESCALAR";
@@ -829,12 +823,15 @@ PP(pp_tie)
 PP(pp_untie)
 {
     dSP;
+    MAGIC *mg;
     SV *sv = POPs;
     char how = (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV)
 		? PERL_MAGIC_tied : PERL_MAGIC_tiedscalar;
 
-        MAGIC * mg ;
-        if ((mg = SvTIED_mg(sv, how))) {
+    if (SvTYPE(sv) == SVt_PVGV && !(sv = (SV *)GvIOp(sv)))
+	RETPUSHYES;
+
+    if ((mg = SvTIED_mg(sv, how))) {
 	SV *obj = SvRV(mg->mg_obj);
 	GV *gv;
 	CV *cv = NULL;
@@ -855,18 +852,21 @@ PP(pp_untie)
 		    "untie attempted while %"UVuf" inner references still exist",
 		    (UV)SvREFCNT(obj) - 1 ) ;
         }
+	sv_unmagic(sv, how);
     }
-    sv_unmagic(sv, how);
     RETPUSHYES;
 }
 
 PP(pp_tied)
 {
     dSP;
+    MAGIC *mg;
     SV *sv = POPs;
     char how = (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV)
 		? PERL_MAGIC_tied : PERL_MAGIC_tiedscalar;
-    MAGIC *mg;
+
+    if (SvTYPE(sv) == SVt_PVGV && !(sv = (SV *)GvIOp(sv)))
+	RETPUSHUNDEF;
 
     if ((mg = SvTIED_mg(sv, how))) {
 	SV *osv = SvTIED_obj(sv, mg);
@@ -942,8 +942,8 @@ PP(pp_dbmclose)
 
 PP(pp_sselect)
 {
-    dSP; dTARGET;
 #ifdef HAS_SELECT
+    dSP; dTARGET;
     register I32 i;
     register I32 j;
     register char *s;
@@ -1129,6 +1129,7 @@ PP(pp_getc)
 {
     dSP; dTARGET;
     GV *gv;
+    IO *io;
     MAGIC *mg;
 
     if (MAXARG == 0)
@@ -1136,10 +1137,12 @@ PP(pp_getc)
     else
 	gv = (GV*)POPs;
 
-    if ((mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	I32 gimme = GIMME_V;
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	PUTBACK;
 	ENTER;
 	call_method("GETC", gimme);
@@ -1393,7 +1396,9 @@ PP(pp_prtf)
     else
 	gv = PL_defoutgv;
 
-    if ((mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	if (MARK == ORIGMARK) {
 	    MEXTEND(SP, 1);
 	    ++MARK;
@@ -1401,7 +1406,7 @@ PP(pp_prtf)
 	    ++SP;
 	}
 	PUSHMARK(MARK - 1);
-	*MARK = SvTIED_obj((SV*)gv, mg);
+	*MARK = SvTIED_obj((SV*)io, mg);
 	PUTBACK;
 	ENTER;
 	call_method("PRINTF", G_SCALAR);
@@ -1417,7 +1422,7 @@ PP(pp_prtf)
     if (!(io = GvIO(gv))) {
 	if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
 	    report_evil_fh(gv, io, PL_op->op_type);
-	SETERRNO(EBADF,RMS$_IFI);
+	SETERRNO(EBADF,VMS_RMS_IFI);
 	goto just_say_no;
     }
     else if (!(fp = IoOFP(io))) {
@@ -1439,7 +1444,7 @@ PP(pp_prtf)
 	    else if (ckWARN(WARN_CLOSED))
 		report_evil_fh(gv, io, PL_op->op_type);
 	}
-	SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
+	SETERRNO(EBADF,IoIFP(io)?VMS_RMS_FAC:VMS_RMS_IFI);
 	goto just_say_no;
     }
     else {
@@ -1511,13 +1516,14 @@ PP(pp_sysread)
     Size_t wanted;
 
     gv = (GV*)*++MARK;
-    if ((PL_op->op_type == OP_READ || PL_op->op_type == OP_SYSREAD) &&
-	(mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar)))
+    if ((PL_op->op_type == OP_READ || PL_op->op_type == OP_SYSREAD)
+	&& gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
     {
 	SV *sv;
 	
 	PUSHMARK(MARK-1);
-	*MARK = SvTIED_obj((SV*)gv, mg);
+	*MARK = SvTIED_obj((SV*)io, mg);
 	ENTER;
 	call_method("READ", G_SCALAR);
 	LEAVE;
@@ -1739,12 +1745,13 @@ PP(pp_send)
 
     gv = (GV*)*++MARK;
     if (PL_op->op_type == OP_SYSWRITE
-		&& (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar)))
+	&& gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
     {
 	SV *sv;
 	
 	PUSHMARK(MARK-1);
-	*MARK = SvTIED_obj((SV*)gv, mg);
+	*MARK = SvTIED_obj((SV*)io, mg);
 	ENTER;
 	call_method("WRITE", G_SCALAR);
 	LEAVE;
@@ -1860,6 +1867,7 @@ PP(pp_eof)
 {
     dSP;
     GV *gv;
+    IO *io;
     MAGIC *mg;
 
     if (MAXARG == 0) {
@@ -1885,9 +1893,11 @@ PP(pp_eof)
     else
 	gv = PL_last_in_gv = (GV*)POPs;		/* eof(FH) */
 
-    if (gv && (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	PUTBACK;
 	ENTER;
 	call_method("EOF", G_SCALAR);
@@ -1904,6 +1914,7 @@ PP(pp_tell)
 {
     dSP; dTARGET;
     GV *gv;
+    IO *io;
     MAGIC *mg;
 
     if (MAXARG == 0)
@@ -1911,9 +1922,11 @@ PP(pp_tell)
     else
 	gv = PL_last_in_gv = (GV*)POPs;
 
-    if (gv && (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 	PUTBACK;
 	ENTER;
 	call_method("TELL", G_SCALAR);
@@ -1939,6 +1952,7 @@ PP(pp_sysseek)
 {
     dSP;
     GV *gv;
+    IO *io;
     int whence = POPi;
 #if LSEEKSIZE > IVSIZE
     Off_t offset = (Off_t)SvNVx(POPs);
@@ -1949,9 +1963,11 @@ PP(pp_sysseek)
 
     gv = PL_last_in_gv = (GV*)POPs;
 
-    if (gv && (mg = SvTIED_mg((SV*)gv, PERL_MAGIC_tiedscalar))) {
+    if (gv && (io = GvIO(gv))
+	&& (mg = SvTIED_mg((SV*)io, PERL_MAGIC_tiedscalar)))
+    {
 	PUSHMARK(SP);
-	XPUSHs(SvTIED_obj((SV*)gv, mg));
+	XPUSHs(SvTIED_obj((SV*)io, mg));
 #if LSEEKSIZE > IVSIZE
 	XPUSHs(sv_2mortal(newSVnv((NV) offset)));
 #else
@@ -2064,7 +2080,7 @@ PP(pp_truncate)
 	if (result)
 	    RETPUSHYES;
 	if (!errno)
-	    SETERRNO(EBADF,RMS$_IFI);
+	    SETERRNO(EBADF,VMS_RMS_IFI);
 	RETPUSHUNDEF;
     }
 #else
@@ -2091,7 +2107,7 @@ PP(pp_ioctl)
     if (!io || !argsv || !IoIFP(io)) {
 	if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
 	    report_evil_fh(gv, io, PL_op->op_type);
-	SETERRNO(EBADF,RMS$_IFI);	/* well, sort of... */
+	SETERRNO(EBADF,VMS_RMS_IFI);	/* well, sort of... */
 	RETPUSHUNDEF;
     }
 
@@ -2134,7 +2150,7 @@ PP(pp_ioctl)
     if (SvPOK(argsv)) {
 	if (s[SvCUR(argsv)] != 17)
 	    DIE(aTHX_ "Possible memory corruption: %s overflowed 3rd argument",
-		PL_op_name[optype]);
+		OP_NAME(PL_op));
 	s[SvCUR(argsv)] = 0;		/* put our null back */
 	SvSETMAGIC(argsv);		/* Assume it has changed */
     }
@@ -2152,6 +2168,7 @@ PP(pp_ioctl)
 
 PP(pp_flock)
 {
+#ifdef FLOCK
     dSP; dTARGET;
     I32 value;
     int argtype;
@@ -2159,7 +2176,6 @@ PP(pp_flock)
     IO *io = NULL;
     PerlIO *fp;
 
-#ifdef FLOCK
     argtype = POPi;
     if (MAXARG == 0)
 	gv = PL_last_in_gv;
@@ -2179,7 +2195,7 @@ PP(pp_flock)
 	if (ckWARN2(WARN_UNOPENED,WARN_CLOSED))
 	    report_evil_fh(gv, io, PL_op->op_type);
 	value = 0;
-	SETERRNO(EBADF,RMS$_IFI);
+	SETERRNO(EBADF,VMS_RMS_IFI);
     }
     PUSHi(value);
     RETURN;
@@ -2192,8 +2208,8 @@ PP(pp_flock)
 
 PP(pp_socket)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
     GV *gv;
     register IO *io;
     int protocol = POPi;
@@ -2209,7 +2225,7 @@ PP(pp_socket)
 	    report_evil_fh(gv, io, PL_op->op_type);
 	if (IoIFP(io))
 	    do_close(gv, FALSE);
-	SETERRNO(EBADF,LIB$_INVARG);
+	SETERRNO(EBADF,VMS_LIB_INVARG);
 	RETPUSHUNDEF;
     }
 
@@ -2310,8 +2326,8 @@ PP(pp_sockpair)
 
 PP(pp_bind)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
 #ifdef MPE /* Requires PRIV mode to bind() to ports < 1024 */
     extern void GETPRIVMODE();
     extern void GETUSERMODE();
@@ -2360,7 +2376,7 @@ PP(pp_bind)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, PL_op->op_type);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
     RETPUSHUNDEF;
 #else
     DIE(aTHX_ PL_no_sock_func, "bind");
@@ -2369,8 +2385,8 @@ nuts:
 
 PP(pp_connect)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
     SV *addrsv = POPs;
     char *addr;
     GV *gv = (GV*)POPs;
@@ -2390,7 +2406,7 @@ PP(pp_connect)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, PL_op->op_type);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
     RETPUSHUNDEF;
 #else
     DIE(aTHX_ PL_no_sock_func, "connect");
@@ -2399,8 +2415,8 @@ nuts:
 
 PP(pp_listen)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
     int backlog = POPi;
     GV *gv = (GV*)POPs;
     register IO *io = gv ? GvIOn(gv) : NULL;
@@ -2416,7 +2432,7 @@ PP(pp_listen)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, PL_op->op_type);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
     RETPUSHUNDEF;
 #else
     DIE(aTHX_ PL_no_sock_func, "listen");
@@ -2425,8 +2441,8 @@ nuts:
 
 PP(pp_accept)
 {
-    dSP; dTARGET;
 #ifdef HAS_SOCKET
+    dSP; dTARGET;
     GV *ngv;
     GV *ggv;
     register IO *nstio;
@@ -2478,7 +2494,7 @@ PP(pp_accept)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(ggv, ggv ? GvIO(ggv) : 0, PL_op->op_type);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
 
 badexit:
     RETPUSHUNDEF;
@@ -2490,8 +2506,8 @@ badexit:
 
 PP(pp_shutdown)
 {
-    dSP; dTARGET;
 #ifdef HAS_SOCKET
+    dSP; dTARGET;
     int how = POPi;
     GV *gv = (GV*)POPs;
     register IO *io = GvIOn(gv);
@@ -2505,7 +2521,7 @@ PP(pp_shutdown)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, PL_op->op_type);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
     RETPUSHUNDEF;
 #else
     DIE(aTHX_ PL_no_sock_func, "shutdown");
@@ -2523,8 +2539,8 @@ PP(pp_gsockopt)
 
 PP(pp_ssockopt)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
     int optype = PL_op->op_type;
     SV *sv;
     int fd;
@@ -2584,7 +2600,7 @@ PP(pp_ssockopt)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, optype);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
 nuts2:
     RETPUSHUNDEF;
 
@@ -2604,8 +2620,8 @@ PP(pp_getsockname)
 
 PP(pp_getpeername)
 {
-    dSP;
 #ifdef HAS_SOCKET
+    dSP;
     int optype = PL_op->op_type;
     SV *sv;
     int fd;
@@ -2657,7 +2673,7 @@ PP(pp_getpeername)
 nuts:
     if (ckWARN(WARN_CLOSED))
 	report_evil_fh(gv, io, optype);
-    SETERRNO(EBADF,SS$_IVCHAN);
+    SETERRNO(EBADF,VMS_SS_IVCHAN);
 nuts2:
     RETPUSHUNDEF;
 
@@ -3260,7 +3276,7 @@ PP(pp_fttext)
 		gv = cGVOP_gv;
 		report_evil_fh(gv, GvIO(gv), PL_op->op_type);
 	    }
-	    SETERRNO(EBADF,RMS$_IFI);
+	    SETERRNO(EBADF,VMS_RMS_IFI);
 	    RETPUSHUNDEF;
 	}
     }
@@ -3359,27 +3375,29 @@ PP(pp_chdir)
     SV **svp;
     STRLEN n_a;
 
-    if (MAXARG < 1)
-	tmps = Nullch;
+    if( MAXARG == 1 )
+        tmps = POPpx;
     else
-	tmps = POPpx;
-    if (!tmps || !*tmps) {
-	svp = hv_fetch(GvHVn(PL_envgv), "HOME", 4, FALSE);
-	if (svp)
-	    tmps = SvPV(*svp, n_a);
-    }
-    if (!tmps || !*tmps) {
-	svp = hv_fetch(GvHVn(PL_envgv), "LOGDIR", 6, FALSE);
-	if (svp)
-	    tmps = SvPV(*svp, n_a);
-    }
+        tmps = 0;
+
+    if( !tmps || !*tmps ) {
+        if (    (svp = hv_fetch(GvHVn(PL_envgv), "HOME", 4, FALSE))
+             || (svp = hv_fetch(GvHVn(PL_envgv), "LOGDIR", 6, FALSE))
 #ifdef VMS
-    if (!tmps || !*tmps) {
-       svp = hv_fetch(GvHVn(PL_envgv), "SYS$LOGIN", 9, FALSE);
-       if (svp)
-           tmps = SvPV(*svp, n_a);
-    }
+             || (svp = hv_fetch(GvHVn(PL_envgv), "SYS$LOGIN", 9, FALSE))
 #endif
+           )
+        {
+            if( MAXARG == 1 )
+                deprecate("chdir('') or chdir(undef) as chdir()");
+            tmps = SvPV(*svp, n_a);
+        }
+        else {            
+            PUSHi(0);
+            RETURN;
+        }
+    }
+
     TAINT_PROPER("chdir");
     PUSHi( PerlDir_chdir(tmps) >= 0 );
 #ifdef VMS
@@ -3485,17 +3503,16 @@ PP(pp_link)
     char *tmps = SvPV(TOPs, n_a);
     TAINT_PROPER("link");
     SETi( PerlLIO_link(tmps, tmps2) >= 0 );
+    RETURN;
 #else
     DIE(aTHX_ PL_no_func, "link");
 #endif
-    RETURN;
 }
 
 PP(pp_symlink)
 {
 #ifdef HAS_SYMLINK
-    dSP;
-    dTARGET;
+    dSP; dTARGET;
     STRLEN n_a;
     char *tmps2 = POPpx;
     char *tmps = SvPV(TOPs, n_a);
@@ -3687,8 +3704,8 @@ PP(pp_rmdir)
 
 PP(pp_open_dir)
 {
-    dSP;
 #if defined(Direntry_t) && defined(HAS_READDIR)
+    dSP;
     STRLEN n_a;
     char *dirname = POPpx;
     GV *gv = (GV*)POPs;
@@ -3714,8 +3731,8 @@ nope:
 
 PP(pp_readdir)
 {
-    dSP;
 #if defined(Direntry_t) && defined(HAS_READDIR)
+    dSP;
 #if !defined(I_DIRENT) && !defined(VMS)
     Direntry_t *readdir (DIR *);
 #endif
@@ -3772,8 +3789,8 @@ nope:
 
 PP(pp_telldir)
 {
-    dSP; dTARGET;
 #if defined(HAS_TELLDIR) || defined(telldir)
+    dSP; dTARGET;
  /* XXX does _anyone_ need this? --AD 2/20/1998 */
  /* XXX netbsd still seemed to.
     XXX HAS_TELLDIR_PROTO is new style, NEED_TELLDIR_PROTO is old style.
@@ -3800,8 +3817,8 @@ nope:
 
 PP(pp_seekdir)
 {
-    dSP;
 #if defined(HAS_SEEKDIR) || defined(seekdir)
+    dSP;
     long along = POPl;
     GV *gv = (GV*)POPs;
     register IO *io = GvIOn(gv);
@@ -3823,8 +3840,8 @@ nope:
 
 PP(pp_rewinddir)
 {
-    dSP;
 #if defined(HAS_REWINDDIR) || defined(rewinddir)
+    dSP;
     GV *gv = (GV*)POPs;
     register IO *io = GvIOn(gv);
 
@@ -3844,8 +3861,8 @@ nope:
 
 PP(pp_closedir)
 {
-    dSP;
 #if defined(Direntry_t) && defined(HAS_READDIR)
+    dSP;
     GV *gv = (GV*)POPs;
     register IO *io = GvIOn(gv);
 
@@ -3865,7 +3882,7 @@ PP(pp_closedir)
     RETPUSHYES;
 nope:
     if (!errno)
-	SETERRNO(EBADF,RMS$_IFI);
+	SETERRNO(EBADF,VMS_RMS_IFI);
     RETPUSHUNDEF;
 #else
     DIE(aTHX_ PL_no_dir_func, "closedir");
@@ -3883,7 +3900,7 @@ PP(pp_fork)
 
     EXTEND(SP, 1);
     PERL_FLUSHALL_FOR_CHILD;
-    childpid = fork();
+    childpid = PerlProc_fork();
     if (childpid < 0)
 	RETSETUNDEF;
     if (!childpid) {
@@ -3975,6 +3992,8 @@ PP(pp_system)
     I32 value;
     STRLEN n_a;
     int result;
+    int pp[2];
+    I32 did_pipes = 0;
 
     if (SP - MARK == 1) {
 	if (PL_tainting) {
@@ -3984,75 +4003,73 @@ PP(pp_system)
 	}
     }
     PERL_FLUSHALL_FOR_CHILD;
-#if (defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(OS2) && !defined(__CYGWIN__) || defined(PERL_MICRO)
-  {
-    Pid_t childpid;
-    int status;
-    Sigsave_t ihand,qhand;     /* place to save signals during system() */
-    I32 did_pipes = 0;
-    int pp[2];
-
-    if (PerlProc_pipe(pp) >= 0)
-	did_pipes = 1;
-    while ((childpid = vfork()) == -1) {
-	if (errno != EAGAIN) {
-	    value = -1;
-	    SP = ORIGMARK;
-	    PUSHi(value);
-	    if (did_pipes) {
-		PerlLIO_close(pp[0]);
-		PerlLIO_close(pp[1]);
-	    }
-	    RETURN;
-	}
-	sleep(5);
-    }
-    if (childpid > 0) {
-	if (did_pipes)
-	    PerlLIO_close(pp[1]);
+#if (defined(HAS_FORK) || defined(AMIGAOS)) && !defined(VMS) && !defined(OS2) || defined(PERL_MICRO)
+    {
+	 Pid_t childpid;
+	 int status;
+	 Sigsave_t ihand,qhand;     /* place to save signals during system() */
+	 
+	 if (PerlProc_pipe(pp) >= 0)
+	      did_pipes = 1;
+	 while ((childpid = PerlProc_fork()) == -1) {
+	      if (errno != EAGAIN) {
+		   value = -1;
+		   SP = ORIGMARK;
+		   PUSHi(value);
+		   if (did_pipes) {
+			PerlLIO_close(pp[0]);
+			PerlLIO_close(pp[1]);
+		   }
+		   RETURN;
+	      }
+	      sleep(5);
+	 }
+	 if (childpid > 0) {
+	      if (did_pipes)
+		   PerlLIO_close(pp[1]);
 #ifndef PERL_MICRO
-	rsignal_save(SIGINT, SIG_IGN, &ihand);
-	rsignal_save(SIGQUIT, SIG_IGN, &qhand);
+	      rsignal_save(SIGINT, SIG_IGN, &ihand);
+	      rsignal_save(SIGQUIT, SIG_IGN, &qhand);
 #endif
-	do {
-	    result = wait4pid(childpid, &status, 0);
-	} while (result == -1 && errno == EINTR);
+	      do {
+		   result = wait4pid(childpid, &status, 0);
+	      } while (result == -1 && errno == EINTR);
 #ifndef PERL_MICRO
-	(void)rsignal_restore(SIGINT, &ihand);
-	(void)rsignal_restore(SIGQUIT, &qhand);
-#endif
-	STATUS_NATIVE_SET(result == -1 ? -1 : status);
-	do_execfree();	/* free any memory child malloced on vfork */
-	SP = ORIGMARK;
-	if (did_pipes) {
-	    int errkid;
-	    int n = 0, n1;
-
-	    while (n < sizeof(int)) {
-		n1 = PerlLIO_read(pp[0],
-				  (void*)(((char*)&errkid)+n),
-				  (sizeof(int)) - n);
-		if (n1 <= 0)
-		    break;
-		n += n1;
-	    }
-	    PerlLIO_close(pp[0]);
-	    if (n) {			/* Error */
-		if (n != sizeof(int))
-		    DIE(aTHX_ "panic: kid popen errno read");
-		errno = errkid;		/* Propagate errno from kid */
-		STATUS_CURRENT = -1;
-	    }
-	}
-	PUSHi(STATUS_CURRENT);
-	RETURN;
-    }
-    if (did_pipes) {
-	PerlLIO_close(pp[0]);
+	      (void)rsignal_restore(SIGINT, &ihand);
+	      (void)rsignal_restore(SIGQUIT, &qhand);
+#endif
+	      STATUS_NATIVE_SET(result == -1 ? -1 : status);
+	      do_execfree();	/* free any memory child malloced on fork */
+	      SP = ORIGMARK;
+	      if (did_pipes) {
+		   int errkid;
+		   int n = 0, n1;
+		   
+		   while (n < sizeof(int)) {
+			n1 = PerlLIO_read(pp[0],
+					  (void*)(((char*)&errkid)+n),
+					  (sizeof(int)) - n);
+			if (n1 <= 0)
+			     break;
+			n += n1;
+		   }
+		   PerlLIO_close(pp[0]);
+		   if (n) {			/* Error */
+			if (n != sizeof(int))
+			     DIE(aTHX_ "panic: kid popen errno read");
+			errno = errkid;		/* Propagate errno from kid */
+			STATUS_CURRENT = -1;
+		   }
+	      }
+	      PUSHi(STATUS_CURRENT);
+	      RETURN;
+	 }
+	 if (did_pipes) {
+	      PerlLIO_close(pp[0]);
 #if defined(HAS_FCNTL) && defined(F_SETFD)
-	fcntl(pp[1], F_SETFD, FD_CLOEXEC);
-  }
+	      fcntl(pp[1], F_SETFD, FD_CLOEXEC);
 #endif
+	 }
     }
     if (PL_op->op_flags & OPf_STACKED) {
 	SV *really = *++MARK;
@@ -4128,11 +4145,6 @@ PP(pp_exec)
 #endif
     }
 
-#if !defined(HAS_FORK) && defined(USE_ITHREADS) && defined(PERL_IMPLICIT_SYS)
-    if (value >= 0)
-	my_exit(value);
-#endif
-
     SP = ORIGMARK;
     PUSHi(value);
     RETURN;
@@ -4140,9 +4152,9 @@ PP(pp_exec)
 
 PP(pp_kill)
 {
+#ifdef HAS_KILL
     dSP; dMARK; dTARGET;
     I32 value;
-#ifdef HAS_KILL
     value = (I32)apply(PL_op->op_type, MARK, SP);
     SP = MARK;
     PUSHi(value);
@@ -4222,8 +4234,8 @@ PP(pp_setpgrp)
 
 PP(pp_getpriority)
 {
-    dSP; dTARGET;
 #ifdef HAS_GETPRIORITY
+    dSP; dTARGET;
     int who = POPi;
     int which = TOPi;
     SETi( getpriority(which, who) );
@@ -4235,8 +4247,8 @@ PP(pp_getpriority)
 
 PP(pp_setpriority)
 {
-    dSP; dTARGET;
 #ifdef HAS_SETPRIORITY
+    dSP; dTARGET;
     int niceval = POPi;
     int who = POPi;
     int which = TOPi;
@@ -4279,13 +4291,9 @@ PP(pp_time)
 
 PP(pp_tms)
 {
+#ifdef HAS_TIMES
     dSP;
-
-#ifndef HAS_TIMES
-    DIE(aTHX_ "times not implemented");
-#else
     EXTEND(SP, 4);
-
 #ifndef VMS
     (void)PerlProc_times(&PL_timesbuf);
 #else
@@ -4301,6 +4309,8 @@ PP(pp_tms)
 	PUSHs(sv_2mortal(newSVnv(((NV)PL_timesbuf.tms_cstime)/HZ)));
     }
     RETURN;
+#else
+    DIE(aTHX_ "times not implemented");
 #endif /* HAS_TIMES */
 }
 
@@ -4332,10 +4342,10 @@ PP(pp_gmtime)
     else
 	tmbuf = gmtime(&when);
 
-    EXTEND(SP, 9);
-    EXTEND_MORTAL(9);
     if (GIMME != G_ARRAY) {
 	SV *tsv;
+        EXTEND(SP, 1);
+        EXTEND_MORTAL(1);
 	if (!tmbuf)
 	    RETPUSHUNDEF;
 	tsv = Perl_newSVpvf(aTHX_ "%s %s %2d %02d:%02d:%02d %d",
@@ -4349,7 +4359,9 @@ PP(pp_gmtime)
 	PUSHs(sv_2mortal(tsv));
     }
     else if (tmbuf) {
-	PUSHs(sv_2mortal(newSViv(tmbuf->tm_sec)));
+        EXTEND(SP, 9);
+        EXTEND_MORTAL(9);
+        PUSHs(sv_2mortal(newSViv(tmbuf->tm_sec)));
 	PUSHs(sv_2mortal(newSViv(tmbuf->tm_min)));
 	PUSHs(sv_2mortal(newSViv(tmbuf->tm_hour)));
 	PUSHs(sv_2mortal(newSViv(tmbuf->tm_mday)));
@@ -4364,9 +4376,9 @@ PP(pp_gmtime)
 
 PP(pp_alarm)
 {
+#ifdef HAS_ALARM
     dSP; dTARGET;
     int anum;
-#ifdef HAS_ALARM
     anum = POPi;
     anum = alarm((unsigned int)anum);
     EXTEND(SP, 1);
@@ -4538,8 +4550,8 @@ PP(pp_ghbyaddr)
 
 PP(pp_ghostent)
 {
-    dSP;
 #if defined(HAS_GETHOSTBYNAME) || defined(HAS_GETHOSTBYADDR) || defined(HAS_GETHOSTENT)
+    dSP;
     I32 which = PL_op->op_type;
     register char **elem;
     register SV *sv;
@@ -4647,8 +4659,8 @@ PP(pp_gnbyaddr)
 
 PP(pp_gnetent)
 {
-    dSP;
 #if defined(HAS_GETNETBYNAME) || defined(HAS_GETNETBYADDR) || defined(HAS_GETNETENT)
+    dSP;
     I32 which = PL_op->op_type;
     register char **elem;
     register SV *sv;
@@ -4735,8 +4747,8 @@ PP(pp_gpbynumber)
 
 PP(pp_gprotoent)
 {
-    dSP;
 #if defined(HAS_GETPROTOBYNAME) || defined(HAS_GETPROTOBYNUMBER) || defined(HAS_GETPROTOENT)
+    dSP;
     I32 which = PL_op->op_type;
     register char **elem;
     register SV *sv;
@@ -4818,8 +4830,8 @@ PP(pp_gsbyport)
 
 PP(pp_gservent)
 {
-    dSP;
 #if defined(HAS_GETSERVBYNAME) || defined(HAS_GETSERVBYPORT) || defined(HAS_GETSERVENT)
+    dSP;
     I32 which = PL_op->op_type;
     register char **elem;
     register SV *sv;
@@ -4908,8 +4920,8 @@ PP(pp_gservent)
 
 PP(pp_shostent)
 {
-    dSP;
 #ifdef HAS_SETHOSTENT
+    dSP;
     PerlSock_sethostent(TOPi);
     RETSETYES;
 #else
@@ -4919,8 +4931,8 @@ PP(pp_shostent)
 
 PP(pp_snetent)
 {
-    dSP;
 #ifdef HAS_SETNETENT
+    dSP;
     PerlSock_setnetent(TOPi);
     RETSETYES;
 #else
@@ -4930,8 +4942,8 @@ PP(pp_snetent)
 
 PP(pp_sprotoent)
 {
-    dSP;
 #ifdef HAS_SETPROTOENT
+    dSP;
     PerlSock_setprotoent(TOPi);
     RETSETYES;
 #else
@@ -4941,8 +4953,8 @@ PP(pp_sprotoent)
 
 PP(pp_sservent)
 {
-    dSP;
 #ifdef HAS_SETSERVENT
+    dSP;
     PerlSock_setservent(TOPi);
     RETSETYES;
 #else
@@ -4952,8 +4964,8 @@ PP(pp_sservent)
 
 PP(pp_ehostent)
 {
-    dSP;
 #ifdef HAS_ENDHOSTENT
+    dSP;
     PerlSock_endhostent();
     EXTEND(SP,1);
     RETPUSHYES;
@@ -4964,8 +4976,8 @@ PP(pp_ehostent)
 
 PP(pp_enetent)
 {
-    dSP;
 #ifdef HAS_ENDNETENT
+    dSP;
     PerlSock_endnetent();
     EXTEND(SP,1);
     RETPUSHYES;
@@ -4976,8 +4988,8 @@ PP(pp_enetent)
 
 PP(pp_eprotoent)
 {
-    dSP;
 #ifdef HAS_ENDPROTOENT
+    dSP;
     PerlSock_endprotoent();
     EXTEND(SP,1);
     RETPUSHYES;
@@ -4988,8 +5000,8 @@ PP(pp_eprotoent)
 
 PP(pp_eservent)
 {
-    dSP;
 #ifdef HAS_ENDSERVENT
+    dSP;
     PerlSock_endservent();
     EXTEND(SP,1);
     RETPUSHYES;
@@ -5018,8 +5030,8 @@ PP(pp_gpwuid)
 
 PP(pp_gpwent)
 {
-    dSP;
 #ifdef HAS_PASSWD
+    dSP;
     I32 which = PL_op->op_type;
     register SV *sv;
     STRLEN n_a;
@@ -5232,8 +5244,8 @@ PP(pp_gpwent)
 
 PP(pp_spwent)
 {
-    dSP;
 #if defined(HAS_PASSWD) && defined(HAS_SETPWENT)
+    dSP;
     setpwent();
     RETPUSHYES;
 #else
@@ -5243,8 +5255,8 @@ PP(pp_spwent)
 
 PP(pp_epwent)
 {
-    dSP;
 #if defined(HAS_PASSWD) && defined(HAS_ENDPWENT)
+    dSP;
     endpwent();
     RETPUSHYES;
 #else
@@ -5272,8 +5284,8 @@ PP(pp_ggrgid)
 
 PP(pp_ggrent)
 {
-    dSP;
 #ifdef HAS_GROUP
+    dSP;
     I32 which = PL_op->op_type;
     register char **elem;
     register SV *sv;
@@ -5331,8 +5343,8 @@ PP(pp_ggrent)
 
 PP(pp_sgrent)
 {
-    dSP;
 #if defined(HAS_GROUP) && defined(HAS_SETGRENT)
+    dSP;
     setgrent();
     RETPUSHYES;
 #else
@@ -5342,8 +5354,8 @@ PP(pp_sgrent)
 
 PP(pp_egrent)
 {
-    dSP;
 #if defined(HAS_GROUP) && defined(HAS_ENDGRENT)
+    dSP;
     endgrent();
     RETPUSHYES;
 #else
@@ -5353,8 +5365,8 @@ PP(pp_egrent)
 
 PP(pp_getlogin)
 {
-    dSP; dTARGET;
 #ifdef HAS_GETLOGIN
+    dSP; dTARGET;
     char *tmps;
     EXTEND(SP, 1);
     if (!(tmps = PerlProc_getlogin()))