[p5sagit/p5-mst-13.2.git] / vms / ext / Stdio / Stdio.xs

/* VMS::Stdio - VMS extensions to stdio routines 
 *
 * Version:  2.2
 * Author:   Charles Bailey  bailey@newman.upenn.edu
 * Revised:  18-Jul-1998
 *
 */

#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <file.h>
#include <iodef.h>
#include <rms.h>
#include <starlet.h>

static bool
constant(name, pval)
char *name;
IV *pval;
{
    if (strnNE(name, "O_", 2)) return FALSE;

    if (strEQ(name, "O_APPEND"))
#ifdef O_APPEND
	{ *pval = O_APPEND; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_CREAT"))
#ifdef O_CREAT
	{ *pval = O_CREAT; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_EXCL"))
#ifdef O_EXCL
	{ *pval = O_EXCL; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_NDELAY"))
#ifdef O_NDELAY
	{ *pval = O_NDELAY; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_NOWAIT"))
#ifdef O_NOWAIT
	{ *pval = O_NOWAIT; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_RDONLY"))
#ifdef O_RDONLY
	{ *pval = O_RDONLY; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_RDWR"))
#ifdef O_RDWR
	{ *pval = O_RDWR; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_TRUNC"))
#ifdef O_TRUNC
	{ *pval = O_TRUNC; return TRUE; }
#else
	return FALSE;
#endif
    if (strEQ(name, "O_WRONLY"))
#ifdef O_WRONLY
	{ *pval = O_WRONLY; return TRUE; }
#else
	return FALSE;
#endif

    return FALSE;
}


static SV *
newFH(PerlIO *fp, char type) {
    SV *rv;
    GV **stashp, *gv = (GV *)NEWSV(0,0);
    HV *stash;
    IO *io;

    /* Find stash for VMS::Stdio.  We don't do this once at boot
     * to allow for possibility of threaded Perl with per-thread
     * symbol tables.  This code (through io = ...) is really
     * equivalent to gv_fetchpv("VMS::Stdio::__FH__",TRUE,SVt_PVIO),
     * with a little less overhead, and good exercise for me. :-) */
    stashp = (GV **)hv_fetch(PL_defstash,"VMS::",5,TRUE);
    if (!stashp || *stashp == (GV *)&PL_sv_undef) return Nullsv;
    if (!(stash = GvHV(*stashp))) stash = GvHV(*stashp) = newHV();
    stashp = (GV **)hv_fetch(GvHV(*stashp),"Stdio::",7,TRUE);
    if (!stashp || *stashp == (GV *)&PL_sv_undef) return Nullsv;
    if (!(stash = GvHV(*stashp))) stash = GvHV(*stashp) = newHV();

    /* Set up GV to point to IO, and then take reference */
    gv_init(gv,stash,"__FH__",6,0);
    io = GvIOp(gv) = newIO();
    IoIFP(io) = fp;
    if (type != '<') IoOFP(io) = fp;
    IoTYPE(io) = type;
    rv = newRV((SV *)gv);
    SvREFCNT_dec(gv);
    return sv_bless(rv,stash);
}

MODULE = VMS::Stdio  PACKAGE = VMS::Stdio

void
constant(name)
	char *	name
	PROTOTYPE: $
	CODE:
	IV i;
	if (constant(name, &i))
	    ST(0) = sv_2mortal(newSViv(i));
	else
	    ST(0) = &PL_sv_undef;

void
binmode(fh)
	SV *	fh
	PROTOTYPE: $
	CODE:
	    IO *io = sv_2io(fh);
           PerlIO *fp = io ? IoOFP(io) : NULL;
	    char iotype = io ? IoTYPE(io) : '\0';
	    char filespec[NAM$C_MAXRSS], *acmode, *s, *colon, *dirend = Nullch;
	    int ret = 0, saverrno = errno, savevmserrno = vaxc$errno;
           SV pos;
	    if (fp == NULL || strchr(">was+-|",iotype) == Nullch) {
	      set_errno(EBADF); set_vaxc_errno(SS$_IVCHAN); XSRETURN_UNDEF;
	    }
           if (!PerlIO_getname(fp,filespec)) XSRETURN_UNDEF;
	    for (s = filespec; *s; s++) {
	      if (*s == ':') colon = s;
	      else if (*s == ']' || *s == '>') dirend = s;
	    }
	    /* Looks like a tmpfile, which will go away if reopened */
	    if (s == dirend + 3) {
	      set_errno(EBADF); set_vaxc_errno(RMS$_IOP); XSRETURN_UNDEF;
	    }
	    /* If we've got a non-file-structured device, clip off the trailing
	     * junk, and don't lose sleep if we can't get a stream position.  */
	    if (dirend == Nullch) *(colon+1) = '\0'; 
           if (iotype != '-' && (ret = PerlIO_getpos(fp, &pos)) == -1 && dirend)
	      XSRETURN_UNDEF;
	    switch (iotype) {
	      case '<': case 'r':           acmode = "rb";                      break;
	      case '>': case 'w': case '|':
	        /* use 'a' instead of 'w' to avoid creating new file;
	           fsetpos below will take care of restoring file position */
	      case 'a':                     acmode = "ab";                      break;
	      case '+':  case 's':          acmode = "rb+";                     break;
             case '-':                     acmode = PerlIO_fileno(fp) ? "ab" : "rb";  break;
	      /* iotype'll be null for the SYS$INPUT:/SYS$OUTPUT:/SYS$ERROR: files */
	      /* since we didn't really open them and can't really */
	      /* reopen them */
	      case 0:                       XSRETURN_UNDEF;
	      default:
	        if (PL_dowarn) warn("Unrecognized iotype %c for %s in binmode",
	                         iotype, filespec);
	        acmode = "rb+";
	    }
           /* appearances to the contrary, this is an freopen substitute */
           SV *name = sv_2mortal(newSVpvn(filespec,strlen(filespec)));
           if (PerlIO_openn(Nullch,acmode,-1,0,0,fp,1,&name) == Nullfp) XSRETURN_UNDEF;
           if (iotype != '-' && ret != -1 && PerlIO_setpos(fp,&pos) == -1) XSRETURN_UNDEF;
	    if (ret == -1) { set_errno(saverrno); set_vaxc_errno(savevmserrno); }
	    XSRETURN_YES;


void
flush(fp)
       PerlIO * fp
	PROTOTYPE: $
	CODE:
           FILE *stdio = PerlIO_exportFILE(fp,0);
           if (fflush(stdio)) { ST(0) = &PL_sv_undef; }
           else            { clearerr(stdio); ST(0) = &PL_sv_yes; }
           PerlIO_releaseFILE(fp,stdio);

char *
getname(fp)
       PerlIO * fp
	PROTOTYPE: $
	CODE:
	    char fname[NAM$C_MAXRSS+1];
	    ST(0) = sv_newmortal();
           if (PerlIO_getname(fp,fname) != NULL) sv_setpv(ST(0),fname);

void
rewind(fp)
       PerlIO * fp
	PROTOTYPE: $
	CODE:
           FILE *stdio = PerlIO_exportFILE(fp,0);
           ST(0) = rewind(stdio) ? &PL_sv_undef : &PL_sv_yes;
           PerlIO_releaseFILE(fp,stdio);

void
remove(name)
	char *name
	PROTOTYPE: $
	CODE:
	    ST(0) = remove(name) ? &PL_sv_undef : &PL_sv_yes;

void
setdef(...)
	PROTOTYPE: @
	CODE:
	    char vmsdef[NAM$C_MAXRSS+1], es[NAM$C_MAXRSS], sep;
	    unsigned long int retsts;
	    struct FAB deffab = cc$rms_fab;
	    struct NAM defnam = cc$rms_nam;
	    struct dsc$descriptor_s dirdsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
	    STRLEN n_a;
	    if (items) {
		SV *defsv = ST(items-1);  /* mimic chdir() */
		ST(0) = &PL_sv_undef;
		if (!SvPOK(defsv)) { SETERRNO(EINVAL,LIB$_INVARG); XSRETURN(1); }
		if (tovmsspec(SvPV(defsv,n_a),vmsdef) == NULL) { XSRETURN(1); }
		deffab.fab$l_fna = vmsdef; deffab.fab$b_fns = strlen(vmsdef);
	    }
	    else {
		deffab.fab$l_fna = "SYS$LOGIN"; deffab.fab$b_fns = 9;
		EXTEND(sp,1);  ST(0) = &PL_sv_undef;
	    }
	    defnam.nam$l_esa = es;  defnam.nam$b_ess = sizeof es;
	    deffab.fab$l_nam = &defnam;
	    retsts = sys$parse(&deffab,0,0);
	    if (retsts & 1) {
		if (defnam.nam$v_wildcard) retsts = RMS$_WLD;
		else if (defnam.nam$b_name || defnam.nam$b_type > 1 ||
	             defnam.nam$b_ver > 1) retsts = RMS$_DIR;
		}
	    defnam.nam$b_nop |= NAM$M_SYNCHK; defnam.nam$l_rlf = NULL; deffab.fab$b_dns = 0;
	    if (!(retsts & 1)) {
		set_vaxc_errno(retsts);
		switch (retsts) {
		    case RMS$_DNF:
			set_errno(ENOENT); break;
		    case RMS$_SYN: case RMS$_DIR: case RMS$_DEV:
			set_errno(EINVAL); break;
		    case RMS$_PRV:
			set_errno(EACCES); break;
		    default:
			set_errno(EVMSERR); break;
		}
		(void) sys$parse(&deffab,0,0);  /* free up context */
		XSRETURN(1);
	    }
	    sep = *defnam.nam$l_dir;
	    *defnam.nam$l_dir = '\0';
	    my_setenv("SYS$DISK",defnam.nam$b_node ? defnam.nam$l_node : defnam.nam$l_dev);
	    *defnam.nam$l_dir = sep;
	    dirdsc.dsc$a_pointer = defnam.nam$l_dir; dirdsc.dsc$w_length = defnam.nam$b_dir;
	    if ((retsts = sys$setddir(&dirdsc,0,0)) & 1) ST(0) = &PL_sv_yes;
	    else { set_errno(EVMSERR); set_vaxc_errno(retsts); }
	    (void) sys$parse(&deffab,0,0);  /* free up context */

void
sync(fp)
       PerlIO * fp
	PROTOTYPE: $
	CODE:
           FILE *stdio = PerlIO_exportFILE(fp,0);
           if (fsync(fileno(stdio))) { ST(0) = &PL_sv_undef; }
           else                   { clearerr(stdio); ST(0) = &PL_sv_yes; }
           PerlIO_releaseFILE(fp,stdio);

char *
tmpnam()
	PROTOTYPE:
	CODE:
	    char fname[L_tmpnam];
	    ST(0) = sv_newmortal();
	    if (tmpnam(fname) != NULL) sv_setpv(ST(0),fname);

void
vmsopen(spec,...)
	char *	spec
	PROTOTYPE: @
	CODE:
	    char *args[8],mode[3] = {'r','\0','\0'}, type = '<';
	    register int i, myargc;
	    FILE *fp;
           PerlIO *pio_fp;
	    STRLEN n_a;
	
	    if (!spec || !*spec) {
	       SETERRNO(EINVAL,LIB$_INVARG);
	       XSRETURN_UNDEF;
	    }
	    if (items > 9) croak("too many args");
	
	    /* First, set up name and mode args from perl's string */
	    if (*spec == '+') {
	      mode[1] = '+';
	      spec++;
	    }
	    if (*spec == '>') {
	      if (*(spec+1) == '>') *mode = 'a', spec += 2;
	      else *mode = 'w',  spec++;
	    }
	    else if (*spec == '<') spec++;
	    myargc = items - 1;
	    for (i = 0; i < myargc; i++) args[i] = SvPV(ST(i+1),n_a);
	    /* This hack brought to you by C's opaque arglist management */
	    switch (myargc) {
	      case 0:
	        fp = fopen(spec,mode);
	        break;
	      case 1:
	        fp = fopen(spec,mode,args[0]);
	        break;
	      case 2:
	        fp = fopen(spec,mode,args[0],args[1]);
	        break;
	      case 3:
	        fp = fopen(spec,mode,args[0],args[1],args[2]);
	        break;
	      case 4:
	        fp = fopen(spec,mode,args[0],args[1],args[2],args[3]);
	        break;
	      case 5:
	        fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4]);
	        break;
	      case 6:
	        fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5]);
	        break;
	      case 7:
	        fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
	        break;
	      case 8:
	        fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
	        break;
	    }
           if (fp != Null(FILE*)) {
             pio_fp = PerlIO_importFILE(fp,0);
             SV *fh = newFH(pio_fp,(mode[1] ? '+' : (mode[0] == 'r' ? '<' : (mode[0] == 'a' ? 'a' : '>'))));
	      ST(0) = (fh ? sv_2mortal(fh) : &PL_sv_undef);
	    }
	    else { ST(0) = &PL_sv_undef; }

void
vmssysopen(spec,mode,perm,...)
	char *	spec
	int	mode
	int	perm
	PROTOTYPE: @
	CODE:
	    char *args[8];
	    int i, myargc, fd;
	    FILE *fp;
           PerlIO *pio_fp;
	    SV *fh;
	    STRLEN n_a;
	    if (!spec || !*spec) {
	       SETERRNO(EINVAL,LIB$_INVARG);
	       XSRETURN_UNDEF;
	    }
	    if (items > 11) croak("too many args");
	    myargc = items - 3;
	    for (i = 0; i < myargc; i++) args[i] = SvPV(ST(i+3),n_a);
	    /* More fun with C calls; can't combine with above because
	       args 2,3 of different types in fopen() and open() */
	    switch (myargc) {
	      case 0:
	        fd = open(spec,mode,perm);
	        break;
	      case 1:
	        fd = open(spec,mode,perm,args[0]);
	        break;
	      case 2:
	        fd = open(spec,mode,perm,args[0],args[1]);
	        break;
	      case 3:
	        fd = open(spec,mode,perm,args[0],args[1],args[2]);
	        break;
	      case 4:
	        fd = open(spec,mode,perm,args[0],args[1],args[2],args[3]);
	        break;
	      case 5:
	        fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4]);
	        break;
	      case 6:
	        fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5]);
	        break;
	      case 7:
	        fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
	        break;
	      case 8:
	        fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
	        break;
	    }
	    i = mode & 3;
	    if (fd >= 0 &&
              ((fp = fdopen(fd, &("r\000w\000r+"[2*i]))) != Null(FILE*))) {
             pio_fp = PerlIO_importFILE(fp,0);
             SV *fh = newFH(pio_fp,"<>++"[i]);
	      ST(0) = (fh ? sv_2mortal(fh) : &PL_sv_undef);
	    }
	    else { ST(0) = &PL_sv_undef; }

void
waitfh(fp)
       PerlIO * fp
	PROTOTYPE: $
	CODE:
           FILE *stdio = PerlIO_exportFILE(fp,0);
           ST(0) = fwait(stdio) ? &PL_sv_undef : &PL_sv_yes;
           PerlIO_releaseFILE(fp,stdio);

void
writeof(mysv)
	SV *	mysv
	PROTOTYPE: $
	CODE:
	    char devnam[257], *cp;
	    unsigned long int chan, iosb[2], retsts, retsts2;
	    struct dsc$descriptor devdsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, devnam};
	    IO *io = sv_2io(mysv);
           PerlIO *fp = io ? IoOFP(io) : NULL;
	    if (fp == NULL || strchr(">was+-|",IoTYPE(io)) == Nullch) {
	      set_errno(EBADF); set_vaxc_errno(SS$_IVCHAN); XSRETURN_UNDEF;
	    }
           if (PerlIO_getname(fp,devnam) == Nullch) { ST(0) = &PL_sv_undef; XSRETURN(1); }
	    if ((cp = strrchr(devnam,':')) != NULL) *(cp+1) = '\0';
	    devdsc.dsc$w_length = strlen(devnam);
	    retsts = sys$assign(&devdsc,&chan,0,0);
	    if (retsts & 1) retsts = sys$qiow(0,chan,IO$_WRITEOF,iosb,0,0,0,0,0,0,0,0);
	    if (retsts & 1) retsts = iosb[0];
	    retsts2 = sys$dassgn(chan);  /* Be sure to deassign the channel */
	    if (retsts & 1) retsts = retsts2;
	    if (retsts & 1) { ST(0) = &PL_sv_yes; }
	    else {
	      set_vaxc_errno(retsts);
	      switch (retsts) {
	        case SS$_EXQUOTA:  case SS$_INSFMEM:  case SS$_MBFULL:
	        case SS$_MBTOOSML: case SS$_NOIOCHAN: case SS$_NOLINKS:
	        case SS$_BUFFEROVF:
	          set_errno(ENOSPC); break;
	        case SS$_ILLIOFUNC: case SS$_DEVOFFLINE: case SS$_NOSUCHDEV:
	          set_errno(EBADF);  break;
	        case SS$_NOPRIV:
	          set_errno(EACCES); break;
	        default:  /* Includes "shouldn't happen" cases that might map */
	          set_errno(EVMSERR); break;         /* to other errno values */
	      }
	      ST(0) = &PL_sv_undef;
	    }
Commit	Line	Data
2ae00b68	1	/* VMS::Stdio - VMS extensions to stdio routines
748a9306	2	*
562a7b0c	3	* Version: 2.2
	4	* Author: Charles Bailey bailey@newman.upenn.edu
	5	* Revised: 18-Jul-1998
748a9306	6	*
748a9306	7	*/
	8
	9	#include "EXTERN.h"
	10	#include "perl.h"
	11	#include "XSUB.h"
2ae00b68	12	#include <file.h>
17f28c40	13	#include <iodef.h>
	14	#include <rms.h>
	15	#include <starlet.h>
2ae00b68	16
	17	static bool
	18	constant(name, pval)
	19	char *name;
	20	IV *pval;
	21	{
	22	if (strnNE(name, "O_", 2)) return FALSE;
	23
	24	if (strEQ(name, "O_APPEND"))
	25	#ifdef O_APPEND
	26	{ *pval = O_APPEND; return TRUE; }
	27	#else
	28	return FALSE;
	29	#endif
	30	if (strEQ(name, "O_CREAT"))
	31	#ifdef O_CREAT
	32	{ *pval = O_CREAT; return TRUE; }
	33	#else
	34	return FALSE;
	35	#endif
	36	if (strEQ(name, "O_EXCL"))
	37	#ifdef O_EXCL
	38	{ *pval = O_EXCL; return TRUE; }
	39	#else
	40	return FALSE;
	41	#endif
	42	if (strEQ(name, "O_NDELAY"))
	43	#ifdef O_NDELAY
	44	{ *pval = O_NDELAY; return TRUE; }
	45	#else
	46	return FALSE;
	47	#endif
	48	if (strEQ(name, "O_NOWAIT"))
	49	#ifdef O_NOWAIT
	50	{ *pval = O_NOWAIT; return TRUE; }
	51	#else
	52	return FALSE;
	53	#endif
	54	if (strEQ(name, "O_RDONLY"))
	55	#ifdef O_RDONLY
	56	{ *pval = O_RDONLY; return TRUE; }
	57	#else
	58	return FALSE;
	59	#endif
	60	if (strEQ(name, "O_RDWR"))
	61	#ifdef O_RDWR
	62	{ *pval = O_RDWR; return TRUE; }
	63	#else
	64	return FALSE;
	65	#endif
	66	if (strEQ(name, "O_TRUNC"))
	67	#ifdef O_TRUNC
	68	{ *pval = O_TRUNC; return TRUE; }
	69	#else
	70	return FALSE;
	71	#endif
	72	if (strEQ(name, "O_WRONLY"))
	73	#ifdef O_WRONLY
	74	{ *pval = O_WRONLY; return TRUE; }
	75	#else
	76	return FALSE;
	77	#endif
	78
	79	return FALSE;
80	}
748a9306	81
748a9306	82
2ae00b68	83	static SV *
a15cef0c	84	newFH(PerlIO *fp, char type) {
55497cff	85	SV *rv;
55497cff	86	GV *stashp, gv = (GV *)NEWSV(0,0);
2ae00b68	87	HV *stash;
	88	IO *io;
	89
	90	/* Find stash for VMS::Stdio. We don't do this once at boot
	91	* to allow for possibility of threaded Perl with per-thread
	92	* symbol tables. This code (through io = ...) is really
	93	* equivalent to gv_fetchpv("VMS::Stdio::__FH__",TRUE,SVt_PVIO),
	94	* with a little less overhead, and good exercise for me. :-) */
6b88bc9c	95	stashp = (GV **)hv_fetch(PL_defstash,"VMS::",5,TRUE);
6b88bc9c	96	if (!stashp \|\| stashp == (GV )&PL_sv_undef) return Nullsv;
2ae00b68	97	if (!(stash = GvHV(stashp))) stash = GvHV(stashp) = newHV();
2ae00b68	98	stashp = (GV *)hv_fetch(GvHV(stashp),"Stdio::",7,TRUE);
6b88bc9c	99	if (!stashp \|\| stashp == (GV )&PL_sv_undef) return Nullsv;
2ae00b68	100	if (!(stash = GvHV(stashp))) stash = GvHV(stashp) = newHV();
	101
	102	/* Set up GV to point to IO, and then take reference */
	103	gv_init(gv,stash,"__FH__",6,0);
	104	io = GvIOp(gv) = newIO();
	105	IoIFP(io) = fp;
5f05dabc	106	if (type != '<') IoOFP(io) = fp;
2ae00b68	107	IoTYPE(io) = type;
55497cff	108	rv = newRV((SV *)gv);
2ae00b68	109	SvREFCNT_dec(gv);
	110	return sv_bless(rv,stash);
	111	}
	112
	113	MODULE = VMS::Stdio PACKAGE = VMS::Stdio
748a9306	114
748a9306	115	void
2ae00b68	116	constant(name)
748a9306	117	char * name
2ae00b68	118	PROTOTYPE: $
	119	CODE:
	120	IV i;
	121	if (constant(name, &i))
	122	ST(0) = sv_2mortal(newSViv(i));
	123	else
6b88bc9c	124	ST(0) = &PL_sv_undef;
2ae00b68	125
2ae00b68	126	void
562a7b0c	127	binmode(fh)
	128	SV * fh
	129	PROTOTYPE: $
	130	CODE:
	131	IO *io = sv_2io(fh);
a15cef0c	132	PerlIO *fp = io ? IoOFP(io) : NULL;
562a7b0c	133	char iotype = io ? IoTYPE(io) : '\0';
	134	char filespec[NAM$C_MAXRSS], acmode, s, colon, dirend = Nullch;
	135	int ret = 0, saverrno = errno, savevmserrno = vaxc$errno;
a15cef0c	136	SV pos;
562a7b0c	137	if (fp == NULL \|\| strchr(">was+-\|",iotype) == Nullch) {
	138	set_errno(EBADF); set_vaxc_errno(SS$_IVCHAN); XSRETURN_UNDEF;
	139	}
a15cef0c	140	if (!PerlIO_getname(fp,filespec)) XSRETURN_UNDEF;
562a7b0c	141	for (s = filespec; *s; s++) {
	142	if (*s == ':') colon = s;
	143	else if (s == ']' \|\| s == '>') dirend = s;
	144	}
	145	/* Looks like a tmpfile, which will go away if reopened */
	146	if (s == dirend + 3) {
	147	set_errno(EBADF); set_vaxc_errno(RMS$_IOP); XSRETURN_UNDEF;
	148	}
	149	/* If we've got a non-file-structured device, clip off the trailing
	150	* junk, and don't lose sleep if we can't get a stream position. */
	151	if (dirend == Nullch) *(colon+1) = '\0';
a15cef0c	152	if (iotype != '-' && (ret = PerlIO_getpos(fp, &pos)) == -1 && dirend)
562a7b0c	153	XSRETURN_UNDEF;
	154	switch (iotype) {
	155	case '<': case 'r': acmode = "rb"; break;
	156	case '>': case 'w': case '\|':
	157	/* use 'a' instead of 'w' to avoid creating new file;
	158	fsetpos below will take care of restoring file position */
	159	case 'a': acmode = "ab"; break;
	160	case '+': case 's': acmode = "rb+"; break;
a15cef0c	161	case '-': acmode = PerlIO_fileno(fp) ? "ab" : "rb"; break;
562a7b0c	162	/* iotype'll be null for the SYS$INPUT:/SYS$OUTPUT:/SYS$ERROR: files */
	163	/* since we didn't really open them and can't really */
	164	/* reopen them */
	165	case 0: XSRETURN_UNDEF;
	166	default:
	167	if (PL_dowarn) warn("Unrecognized iotype %c for %s in binmode",
	168	iotype, filespec);
	169	acmode = "rb+";
	170	}
a15cef0c	171	/* appearances to the contrary, this is an freopen substitute */
	172	SV *name = sv_2mortal(newSVpvn(filespec,strlen(filespec)));
	173	if (PerlIO_openn(Nullch,acmode,-1,0,0,fp,1,&name) == Nullfp) XSRETURN_UNDEF;
	174	if (iotype != '-' && ret != -1 && PerlIO_setpos(fp,&pos) == -1) XSRETURN_UNDEF;
562a7b0c	175	if (ret == -1) { set_errno(saverrno); set_vaxc_errno(savevmserrno); }
	176	XSRETURN_YES;
	177
	178
	179	void
17f28c40	180	flush(fp)
a15cef0c	181	PerlIO * fp
2ae00b68	182	PROTOTYPE: $
2ae00b68	183	CODE:
a15cef0c	184	FILE *stdio = PerlIO_exportFILE(fp,0);
	185	if (fflush(stdio)) { ST(0) = &PL_sv_undef; }
	186	else { clearerr(stdio); ST(0) = &PL_sv_yes; }
	187	PerlIO_releaseFILE(fp,stdio);
2ae00b68	188
	189	char *
	190	getname(fp)
a15cef0c	191	PerlIO * fp
2ae00b68	192	PROTOTYPE: $
2ae00b68	193	CODE:
17f28c40	194	char fname[NAM$C_MAXRSS+1];
2ae00b68	195	ST(0) = sv_newmortal();
a15cef0c	196	if (PerlIO_getname(fp,fname) != NULL) sv_setpv(ST(0),fname);
2ae00b68	197
	198	void
	199	rewind(fp)
a15cef0c	200	PerlIO * fp
2ae00b68	201	PROTOTYPE: $
2ae00b68	202	CODE:
a15cef0c	203	FILE *stdio = PerlIO_exportFILE(fp,0);
	204	ST(0) = rewind(stdio) ? &PL_sv_undef : &PL_sv_yes;
	205	PerlIO_releaseFILE(fp,stdio);
2ae00b68	206
	207	void
	208	remove(name)
	209	char *name
	210	PROTOTYPE: $
	211	CODE:
6b88bc9c	212	ST(0) = remove(name) ? &PL_sv_undef : &PL_sv_yes;
2ae00b68	213
2ae00b68	214	void
17f28c40	215	setdef(...)
	216	PROTOTYPE: @
	217	CODE:
	218	char vmsdef[NAM$C_MAXRSS+1], es[NAM$C_MAXRSS], sep;
	219	unsigned long int retsts;
	220	struct FAB deffab = cc$rms_fab;
	221	struct NAM defnam = cc$rms_nam;
	222	struct dsc$descriptor_s dirdsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
2d8e6c8d	223	STRLEN n_a;
17f28c40	224	if (items) {
17f28c40	225	SV defsv = ST(items-1); / mimic chdir() */
6b88bc9c	226	ST(0) = &PL_sv_undef;
17f28c40	227	if (!SvPOK(defsv)) { SETERRNO(EINVAL,LIB$_INVARG); XSRETURN(1); }
2d8e6c8d	228	if (tovmsspec(SvPV(defsv,n_a),vmsdef) == NULL) { XSRETURN(1); }
17f28c40	229	deffab.fab$l_fna = vmsdef; deffab.fab$b_fns = strlen(vmsdef);
	230	}
	231	else {
	232	deffab.fab$l_fna = "SYS$LOGIN"; deffab.fab$b_fns = 9;
6b88bc9c	233	EXTEND(sp,1); ST(0) = &PL_sv_undef;
17f28c40	234	}
	235	defnam.nam$l_esa = es; defnam.nam$b_ess = sizeof es;
	236	deffab.fab$l_nam = &defnam;
	237	retsts = sys$parse(&deffab,0,0);
	238	if (retsts & 1) {
	239	if (defnam.nam$v_wildcard) retsts = RMS$_WLD;
	240	else if (defnam.nam$b_name \|\| defnam.nam$b_type > 1 \|\|
	241	defnam.nam$b_ver > 1) retsts = RMS$_DIR;
	242	}
	243	defnam.nam$b_nop \|= NAM$M_SYNCHK; defnam.nam$l_rlf = NULL; deffab.fab$b_dns = 0;
	244	if (!(retsts & 1)) {
	245	set_vaxc_errno(retsts);
	246	switch (retsts) {
	247	case RMS$_DNF:
	248	set_errno(ENOENT); break;
	249	case RMS$_SYN: case RMS$_DIR: case RMS$_DEV:
	250	set_errno(EINVAL); break;
	251	case RMS$_PRV:
	252	set_errno(EACCES); break;
	253	default:
	254	set_errno(EVMSERR); break;
	255	}
	256	(void) sys$parse(&deffab,0,0); /* free up context */
	257	XSRETURN(1);
	258	}
	259	sep = *defnam.nam$l_dir;
	260	*defnam.nam$l_dir = '\0';
	261	my_setenv("SYS$DISK",defnam.nam$b_node ? defnam.nam$l_node : defnam.nam$l_dev);
	262	*defnam.nam$l_dir = sep;
	263	dirdsc.dsc$a_pointer = defnam.nam$l_dir; dirdsc.dsc$w_length = defnam.nam$b_dir;
6b88bc9c	264	if ((retsts = sys$setddir(&dirdsc,0,0)) & 1) ST(0) = &PL_sv_yes;
17f28c40	265	else { set_errno(EVMSERR); set_vaxc_errno(retsts); }
	266	(void) sys$parse(&deffab,0,0); /* free up context */
	267
	268	void
2ae00b68	269	sync(fp)
a15cef0c	270	PerlIO * fp
2ae00b68	271	PROTOTYPE: $
2ae00b68	272	CODE:
a15cef0c	273	FILE *stdio = PerlIO_exportFILE(fp,0);
	274	if (fsync(fileno(stdio))) { ST(0) = &PL_sv_undef; }
	275	else { clearerr(stdio); ST(0) = &PL_sv_yes; }
	276	PerlIO_releaseFILE(fp,stdio);
2ae00b68	277
	278	char *
	279	tmpnam()
	280	PROTOTYPE:
	281	CODE:
	282	char fname[L_tmpnam];
	283	ST(0) = sv_newmortal();
	284	if (tmpnam(fname) != NULL) sv_setpv(ST(0),fname);
	285
	286	void
	287	vmsopen(spec,...)
	288	char * spec
	289	PROTOTYPE: @
748a9306	290	CODE:
2ae00b68	291	char *args[8],mode[3] = {'r','\0','\0'}, type = '<';
748a9306	292	register int i, myargc;
748a9306	293	FILE *fp;
a15cef0c	294	PerlIO *pio_fp;
2d8e6c8d	295	STRLEN n_a;
2ae00b68	296
	297	if (!spec \|\| !*spec) {
	298	SETERRNO(EINVAL,LIB$_INVARG);
	299	XSRETURN_UNDEF;
748a9306	300	}
2ae00b68	301	if (items > 9) croak("too many args");
2ae00b68	302
748a9306	303	/* First, set up name and mode args from perl's string */
2ae00b68	304	if (*spec == '+') {
748a9306	305	mode[1] = '+';
2ae00b68	306	spec++;
748a9306	307	}
2ae00b68	308	if (*spec == '>') {
	309	if ((spec+1) == '>') mode = 'a', spec += 2;
	310	else *mode = 'w', spec++;
748a9306	311	}
2ae00b68	312	else if (*spec == '<') spec++;
748a9306	313	myargc = items - 1;
2d8e6c8d	314	for (i = 0; i < myargc; i++) args[i] = SvPV(ST(i+1),n_a);
748a9306	315	/* This hack brought to you by C's opaque arglist management */
	316	switch (myargc) {
	317	case 0:
2ae00b68	318	fp = fopen(spec,mode);
748a9306	319	break;
748a9306	320	case 1:
2ae00b68	321	fp = fopen(spec,mode,args[0]);
748a9306	322	break;
748a9306	323	case 2:
2ae00b68	324	fp = fopen(spec,mode,args[0],args[1]);
748a9306	325	break;
748a9306	326	case 3:
2ae00b68	327	fp = fopen(spec,mode,args[0],args[1],args[2]);
748a9306	328	break;
748a9306	329	case 4:
2ae00b68	330	fp = fopen(spec,mode,args[0],args[1],args[2],args[3]);
748a9306	331	break;
748a9306	332	case 5:
2ae00b68	333	fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4]);
748a9306	334	break;
748a9306	335	case 6:
2ae00b68	336	fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5]);
748a9306	337	break;
748a9306	338	case 7:
2ae00b68	339	fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
748a9306	340	break;
748a9306	341	case 8:
2ae00b68	342	fp = fopen(spec,mode,args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
748a9306	343	break;
748a9306	344	}
a15cef0c	345	if (fp != Null(FILE*)) {
	346	pio_fp = PerlIO_importFILE(fp,0);
	347	SV *fh = newFH(pio_fp,(mode[1] ? '+' : (mode[0] == 'r' ? '<' : (mode[0] == 'a' ? 'a' : '>'))));
6b88bc9c	348	ST(0) = (fh ? sv_2mortal(fh) : &PL_sv_undef);
748a9306	349	}
6b88bc9c	350	else { ST(0) = &PL_sv_undef; }
748a9306	351
2ae00b68	352	void
	353	vmssysopen(spec,mode,perm,...)
	354	char * spec
	355	int mode
	356	int perm
	357	PROTOTYPE: @
748a9306	358	CODE:
2ae00b68	359	char *args[8];
	360	int i, myargc, fd;
	361	FILE *fp;
a15cef0c	362	PerlIO *pio_fp;
2ae00b68	363	SV *fh;
2d8e6c8d	364	STRLEN n_a;
2ae00b68	365	if (!spec \|\| !*spec) {
	366	SETERRNO(EINVAL,LIB$_INVARG);
	367	XSRETURN_UNDEF;
	368	}
	369	if (items > 11) croak("too many args");
	370	myargc = items - 3;
2d8e6c8d	371	for (i = 0; i < myargc; i++) args[i] = SvPV(ST(i+3),n_a);
2ae00b68	372	/* More fun with C calls; can't combine with above because
	373	args 2,3 of different types in fopen() and open() */
	374	switch (myargc) {
	375	case 0:
	376	fd = open(spec,mode,perm);
	377	break;
	378	case 1:
	379	fd = open(spec,mode,perm,args[0]);
	380	break;
	381	case 2:
	382	fd = open(spec,mode,perm,args[0],args[1]);
	383	break;
	384	case 3:
	385	fd = open(spec,mode,perm,args[0],args[1],args[2]);
	386	break;
	387	case 4:
	388	fd = open(spec,mode,perm,args[0],args[1],args[2],args[3]);
	389	break;
	390	case 5:
	391	fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4]);
	392	break;
	393	case 6:
	394	fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5]);
	395	break;
	396	case 7:
	397	fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5],args[6]);
	398	break;
	399	case 8:
	400	fd = open(spec,mode,perm,args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7]);
	401	break;
	402	}
	403	i = mode & 3;
	404	if (fd >= 0 &&
a15cef0c	405	((fp = fdopen(fd, &("r\000w\000r+"[2i]))) != Null(FILE))) {
	406	pio_fp = PerlIO_importFILE(fp,0);
	407	SV *fh = newFH(pio_fp,"<>++"[i]);
6b88bc9c	408	ST(0) = (fh ? sv_2mortal(fh) : &PL_sv_undef);
2ae00b68	409	}
6b88bc9c	410	else { ST(0) = &PL_sv_undef; }
748a9306	411
2ae00b68	412	void
2ae00b68	413	waitfh(fp)
a15cef0c	414	PerlIO * fp
2ae00b68	415	PROTOTYPE: $
748a9306	416	CODE:
a15cef0c	417	FILE *stdio = PerlIO_exportFILE(fp,0);
	418	ST(0) = fwait(stdio) ? &PL_sv_undef : &PL_sv_yes;
	419	PerlIO_releaseFILE(fp,stdio);
17f28c40	420
	421	void
	422	writeof(mysv)
	423	SV * mysv
	424	PROTOTYPE: $
	425	CODE:
	426	char devnam[257], *cp;
	427	unsigned long int chan, iosb[2], retsts, retsts2;
	428	struct dsc$descriptor devdsc = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, devnam};
	429	IO *io = sv_2io(mysv);
a15cef0c	430	PerlIO *fp = io ? IoOFP(io) : NULL;
17f28c40	431	if (fp == NULL \|\| strchr(">was+-\|",IoTYPE(io)) == Nullch) {
562a7b0c	432	set_errno(EBADF); set_vaxc_errno(SS$_IVCHAN); XSRETURN_UNDEF;
17f28c40	433	}
a15cef0c	434	if (PerlIO_getname(fp,devnam) == Nullch) { ST(0) = &PL_sv_undef; XSRETURN(1); }
17f28c40	435	if ((cp = strrchr(devnam,':')) != NULL) *(cp+1) = '\0';
	436	devdsc.dsc$w_length = strlen(devnam);
	437	retsts = sys$assign(&devdsc,&chan,0,0);
	438	if (retsts & 1) retsts = sys$qiow(0,chan,IO$_WRITEOF,iosb,0,0,0,0,0,0,0,0);
	439	if (retsts & 1) retsts = iosb[0];
	440	retsts2 = sys$dassgn(chan); /* Be sure to deassign the channel */
	441	if (retsts & 1) retsts = retsts2;
6b88bc9c	442	if (retsts & 1) { ST(0) = &PL_sv_yes; }
17f28c40	443	else {
	444	set_vaxc_errno(retsts);
	445	switch (retsts) {
	446	case SS$_EXQUOTA: case SS$_INSFMEM: case SS$_MBFULL:
	447	case SS$_MBTOOSML: case SS$_NOIOCHAN: case SS$_NOLINKS:
	448	case SS$_BUFFEROVF:
	449	set_errno(ENOSPC); break;
	450	case SS$_ILLIOFUNC: case SS$_DEVOFFLINE: case SS$_NOSUCHDEV:
	451	set_errno(EBADF); break;
	452	case SS$_NOPRIV:
	453	set_errno(EACCES); break;
	454	default: /* Includes "shouldn't happen" cases that might map */
	455	set_errno(EVMSERR); break; /* to other errno values */
	456	}
6b88bc9c	457	ST(0) = &PL_sv_undef;
17f28c40	458	}