forked from schacon/perl
/
pp_sys.c
3872 lines (3501 loc) · 69.6 KB
/
pp_sys.c
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/* pp_sys.c
*
* Copyright (c) 1991-1994, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* But only a short way ahead its floor and the walls on either side were
* cloven by a great fissure, out of which the red glare came, now leaping
* up, now dying down into darkness; and all the while far below there was
* a rumour and a trouble as of great engines throbbing and labouring.
*/
#include "EXTERN.h"
#include "perl.h"
/* Omit this -- it causes too much grief on mixed systems.
#ifdef I_UNISTD
#include <unistd.h>
#endif
*/
/* Put this after #includes because fork and vfork prototypes may
conflict.
*/
#ifndef HAS_VFORK
# define vfork fork
#endif
#if defined(HAS_SOCKET) && !defined(VMS) /* VMS handles sockets via vmsish.h */
# include <sys/socket.h>
# include <netdb.h>
# ifndef ENOTSOCK
# ifdef I_NET_ERRNO
# include <net/errno.h>
# endif
# endif
#endif
#ifdef HAS_SELECT
#ifdef I_SYS_SELECT
#ifndef I_SYS_TIME
#include <sys/select.h>
#endif
#endif
#endif
#ifdef HOST_NOT_FOUND
extern int h_errno;
#endif
#ifdef HAS_PASSWD
# ifdef I_PWD
# include <pwd.h>
# else
struct passwd *getpwnam _((char *));
struct passwd *getpwuid _((Uid_t));
# endif
struct passwd *getpwent _((void));
#endif
#ifdef HAS_GROUP
# ifdef I_GRP
# include <grp.h>
# else
struct group *getgrnam _((char *));
struct group *getgrgid _((Gid_t));
# endif
struct group *getgrent _((void));
#endif
#ifdef I_UTIME
#include <utime.h>
#endif
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
#ifdef HAS_GETPGRP2
# define getpgrp getpgrp2
#endif
#ifdef HAS_SETPGRP2
# define setpgrp setpgrp2
#endif
#if !defined(HAS_MKDIR) || !defined(HAS_RMDIR)
static int dooneliner _((char *cmd, char *filename));
#endif
/* Pushy I/O. */
PP(pp_backtick)
{
dSP; dTARGET;
FILE *fp;
char *tmps = POPp;
TAINT_PROPER("``");
fp = my_popen(tmps, "r");
if (fp) {
sv_setpv(TARG, ""); /* note that this preserves previous buffer */
if (GIMME == G_SCALAR) {
while (sv_gets(TARG, fp, SvCUR(TARG)) != Nullch)
/*SUPPRESS 530*/
;
XPUSHs(TARG);
}
else {
SV *sv;
for (;;) {
sv = NEWSV(56, 80);
if (sv_gets(sv, fp, 0) == Nullch) {
SvREFCNT_dec(sv);
break;
}
XPUSHs(sv_2mortal(sv));
if (SvLEN(sv) - SvCUR(sv) > 20) {
SvLEN_set(sv, SvCUR(sv)+1);
Renew(SvPVX(sv), SvLEN(sv), char);
}
}
}
statusvalue = my_pclose(fp);
}
else {
statusvalue = -1;
if (GIMME == G_SCALAR)
RETPUSHUNDEF;
}
RETURN;
}
PP(pp_glob)
{
OP *result;
ENTER;
SAVEINT(rschar);
SAVEINT(rslen);
SAVESPTR(last_in_gv); /* We don't want this to be permanent. */
last_in_gv = (GV*)*stack_sp--;
rslen = 1;
#ifdef DOSISH
rschar = 0;
#else
#ifdef CSH
rschar = 0;
#else
rschar = '\n';
#endif /* !CSH */
#endif /* !MSDOS */
result = do_readline();
LEAVE;
return result;
}
PP(pp_indread)
{
last_in_gv = gv_fetchpv(SvPVx(GvSV((GV*)(*stack_sp--)), na), TRUE,SVt_PVIO);
return do_readline();
}
PP(pp_rcatline)
{
last_in_gv = cGVOP->op_gv;
return do_readline();
}
PP(pp_warn)
{
dSP; dMARK;
char *tmps;
if (SP - MARK != 1) {
dTARGET;
do_join(TARG, &sv_no, MARK, SP);
tmps = SvPV(TARG, na);
SP = MARK + 1;
}
else {
tmps = SvPV(TOPs, na);
}
if (!tmps || !*tmps) {
SV *error = GvSV(gv_fetchpv("@", TRUE, SVt_PV));
(void)SvUPGRADE(error, SVt_PV);
if (SvPOK(error) && SvCUR(error))
sv_catpv(error, "\t...caught");
tmps = SvPV(error, na);
}
if (!tmps || !*tmps)
tmps = "Warning: something's wrong";
warn("%s", tmps);
RETSETYES;
}
PP(pp_die)
{
dSP; dMARK;
char *tmps;
if (SP - MARK != 1) {
dTARGET;
do_join(TARG, &sv_no, MARK, SP);
tmps = SvPV(TARG, na);
SP = MARK + 1;
}
else {
tmps = SvPV(TOPs, na);
}
if (!tmps || !*tmps) {
SV *error = GvSV(gv_fetchpv("@", TRUE, SVt_PV));
(void)SvUPGRADE(error, SVt_PV);
if (SvPOK(error) && SvCUR(error))
sv_catpv(error, "\t...propagated");
tmps = SvPV(error, na);
}
if (!tmps || !*tmps)
tmps = "Died";
DIE("%s", tmps);
}
/* I/O. */
PP(pp_open)
{
dSP; dTARGET;
GV *gv;
SV *sv;
char *tmps;
STRLEN len;
if (MAXARG > 1)
sv = POPs;
else
sv = GvSV(TOPs);
gv = (GV*)POPs;
tmps = SvPV(sv, len);
if (do_open(gv, tmps, len,Nullfp)) {
IoLINES(GvIOp(gv)) = 0;
PUSHi( (I32)forkprocess );
}
else if (forkprocess == 0) /* we are a new child */
PUSHi(0);
else
RETPUSHUNDEF;
RETURN;
}
PP(pp_close)
{
dSP;
GV *gv;
if (MAXARG == 0)
gv = defoutgv;
else
gv = (GV*)POPs;
EXTEND(SP, 1);
PUSHs( do_close(gv, TRUE) ? &sv_yes : &sv_no );
RETURN;
}
PP(pp_pipe_op)
{
dSP;
#ifdef HAS_PIPE
GV *rgv;
GV *wgv;
register IO *rstio;
register IO *wstio;
int fd[2];
wgv = (GV*)POPs;
rgv = (GV*)POPs;
if (!rgv || !wgv)
goto badexit;
rstio = GvIOn(rgv);
wstio = GvIOn(wgv);
if (IoIFP(rstio))
do_close(rgv, FALSE);
if (IoIFP(wstio))
do_close(wgv, FALSE);
if (pipe(fd) < 0)
goto badexit;
IoIFP(rstio) = fdopen(fd[0], "r");
IoOFP(wstio) = fdopen(fd[1], "w");
IoIFP(wstio) = IoOFP(wstio);
IoTYPE(rstio) = '<';
IoTYPE(wstio) = '>';
if (!IoIFP(rstio) || !IoOFP(wstio)) {
if (IoIFP(rstio)) fclose(IoIFP(rstio));
else close(fd[0]);
if (IoOFP(wstio)) fclose(IoOFP(wstio));
else close(fd[1]);
goto badexit;
}
RETPUSHYES;
badexit:
RETPUSHUNDEF;
#else
DIE(no_func, "pipe");
#endif
}
PP(pp_fileno)
{
dSP; dTARGET;
GV *gv;
IO *io;
FILE *fp;
if (MAXARG < 1)
RETPUSHUNDEF;
gv = (GV*)POPs;
if (!gv || !(io = GvIO(gv)) || !(fp = IoIFP(io)))
RETPUSHUNDEF;
PUSHi(fileno(fp));
RETURN;
}
PP(pp_umask)
{
dSP; dTARGET;
int anum;
#ifdef HAS_UMASK
if (MAXARG < 1) {
anum = umask(0);
(void)umask(anum);
}
else
anum = umask(POPi);
TAINT_PROPER("umask");
XPUSHi(anum);
#else
DIE(no_func, "Unsupported function umask");
#endif
RETURN;
}
PP(pp_binmode)
{
dSP;
GV *gv;
IO *io;
FILE *fp;
if (MAXARG < 1)
RETPUSHUNDEF;
gv = (GV*)POPs;
EXTEND(SP, 1);
if (!(io = GvIO(gv)) || !(fp = IoIFP(io)))
RETSETUNDEF;
#ifdef DOSISH
#ifdef atarist
if (!fflush(fp) && (fp->_flag |= _IOBIN))
RETPUSHYES;
else
RETPUSHUNDEF;
#else
if (setmode(fileno(fp), OP_BINARY) != -1)
RETPUSHYES;
else
RETPUSHUNDEF;
#endif
#else
RETPUSHYES;
#endif
}
PP(pp_tie)
{
dSP;
SV *varsv;
HV* stash;
GV *gv;
BINOP myop;
SV *sv;
SV **mark = stack_base + ++*markstack_ptr; /* reuse in entersub */
I32 markoff = mark - stack_base - 1;
char *methname;
varsv = mark[0];
if (SvTYPE(varsv) == SVt_PVHV)
methname = "TIEHASH";
else if (SvTYPE(varsv) == SVt_PVAV)
methname = "TIEARRAY";
else if (SvTYPE(varsv) == SVt_PVGV)
methname = "TIEHANDLE";
else
methname = "TIESCALAR";
stash = gv_stashsv(mark[1], FALSE);
if (!stash || !(gv = gv_fetchmethod(stash, methname)) || !GvCV(gv))
DIE("Can't locate object method \"%s\" via package \"%s\"",
methname, SvPV(mark[1],na));
Zero(&myop, 1, BINOP);
myop.op_last = (OP *) &myop;
myop.op_next = Nullop;
myop.op_flags = OPf_KNOW|OPf_STACKED;
ENTER;
SAVESPTR(op);
op = (OP *) &myop;
XPUSHs(gv);
PUTBACK;
if (op = pp_entersub())
run();
SPAGAIN;
sv = TOPs;
if (sv_isobject(sv)) {
if (SvTYPE(varsv) == SVt_PVHV || SvTYPE(varsv) == SVt_PVAV) {
sv_unmagic(varsv, 'P');
sv_magic(varsv, sv, 'P', Nullch, 0);
}
else {
sv_unmagic(varsv, 'q');
sv_magic(varsv, sv, 'q', Nullch, 0);
}
}
LEAVE;
SP = stack_base + markoff;
PUSHs(sv);
RETURN;
}
PP(pp_untie)
{
dSP;
if (SvTYPE(TOPs) == SVt_PVHV || SvTYPE(TOPs) == SVt_PVAV)
sv_unmagic(TOPs, 'P');
else
sv_unmagic(TOPs, 'q');
RETSETYES;
}
PP(pp_dbmopen)
{
dSP;
HV *hv;
dPOPPOPssrl;
HV* stash;
GV *gv;
BINOP myop;
SV *sv;
hv = (HV*)POPs;
sv = sv_mortalcopy(&sv_no);
sv_setpv(sv, "AnyDBM_File");
stash = gv_stashsv(sv, FALSE);
if (!stash || !(gv = gv_fetchmethod(stash, "TIEHASH")) || !GvCV(gv)) {
PUTBACK;
perl_requirepv("AnyDBM_File.pm");
SPAGAIN;
if (!(gv = gv_fetchmethod(stash, "TIEHASH")) || !GvCV(gv))
DIE("No dbm on this machine");
}
Zero(&myop, 1, BINOP);
myop.op_last = (OP *) &myop;
myop.op_next = Nullop;
myop.op_flags = OPf_KNOW|OPf_STACKED;
ENTER;
SAVESPTR(op);
op = (OP *) &myop;
PUTBACK;
pp_pushmark();
EXTEND(sp, 5);
PUSHs(sv);
PUSHs(left);
if (SvIV(right))
PUSHs(sv_2mortal(newSViv(O_RDWR|O_CREAT)));
else
PUSHs(sv_2mortal(newSViv(O_RDWR)));
PUSHs(right);
PUSHs(gv);
PUTBACK;
if (op = pp_entersub())
run();
SPAGAIN;
if (!sv_isobject(TOPs)) {
sp--;
op = (OP *) &myop;
PUTBACK;
pp_pushmark();
PUSHs(sv);
PUSHs(left);
PUSHs(sv_2mortal(newSViv(O_RDONLY)));
PUSHs(right);
PUSHs(gv);
PUTBACK;
if (op = pp_entersub())
run();
SPAGAIN;
}
if (sv_isobject(TOPs))
sv_magic((SV*)hv, TOPs, 'P', Nullch, 0);
LEAVE;
RETURN;
}
PP(pp_dbmclose)
{
return pp_untie(ARGS);
}
PP(pp_sselect)
{
dSP; dTARGET;
#ifdef HAS_SELECT
register I32 i;
register I32 j;
register char *s;
register SV *sv;
double value;
I32 maxlen = 0;
I32 nfound;
struct timeval timebuf;
struct timeval *tbuf = &timebuf;
I32 growsize;
char *fd_sets[4];
#if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
I32 masksize;
I32 offset;
I32 k;
# if BYTEORDER & 0xf0000
# define ORDERBYTE (0x88888888 - BYTEORDER)
# else
# define ORDERBYTE (0x4444 - BYTEORDER)
# endif
#endif
SP -= 4;
for (i = 1; i <= 3; i++) {
if (!SvPOK(SP[i]))
continue;
j = SvCUR(SP[i]);
if (maxlen < j)
maxlen = j;
}
#if BYTEORDER == 0x1234 || BYTEORDER == 0x12345678
growsize = maxlen; /* little endians can use vecs directly */
#else
#ifdef NFDBITS
#ifndef NBBY
#define NBBY 8
#endif
masksize = NFDBITS / NBBY;
#else
masksize = sizeof(long); /* documented int, everyone seems to use long */
#endif
growsize = maxlen + (masksize - (maxlen % masksize));
Zero(&fd_sets[0], 4, char*);
#endif
sv = SP[4];
if (SvOK(sv)) {
value = SvNV(sv);
if (value < 0.0)
value = 0.0;
timebuf.tv_sec = (long)value;
value -= (double)timebuf.tv_sec;
timebuf.tv_usec = (long)(value * 1000000.0);
}
else
tbuf = Null(struct timeval*);
for (i = 1; i <= 3; i++) {
sv = SP[i];
if (!SvOK(sv)) {
fd_sets[i] = 0;
continue;
}
else if (!SvPOK(sv))
SvPV_force(sv,na); /* force string conversion */
j = SvLEN(sv);
if (j < growsize) {
Sv_Grow(sv, growsize);
s = SvPVX(sv) + j;
while (++j <= growsize) {
*s++ = '\0';
}
}
#if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
s = SvPVX(sv);
New(403, fd_sets[i], growsize, char);
for (offset = 0; offset < growsize; offset += masksize) {
for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
fd_sets[i][j+offset] = s[(k % masksize) + offset];
}
#else
fd_sets[i] = SvPVX(sv);
#endif
}
nfound = select(
maxlen * 8,
(Select_fd_set_t) fd_sets[1],
(Select_fd_set_t) fd_sets[2],
(Select_fd_set_t) fd_sets[3],
tbuf);
for (i = 1; i <= 3; i++) {
if (fd_sets[i]) {
sv = SP[i];
#if BYTEORDER != 0x1234 && BYTEORDER != 0x12345678
s = SvPVX(sv);
for (offset = 0; offset < growsize; offset += masksize) {
for (j = 0, k=ORDERBYTE; j < masksize; j++, (k >>= 4))
s[(k % masksize) + offset] = fd_sets[i][j+offset];
}
Safefree(fd_sets[i]);
#endif
SvSETMAGIC(sv);
}
}
PUSHi(nfound);
if (GIMME == G_ARRAY && tbuf) {
value = (double)(timebuf.tv_sec) +
(double)(timebuf.tv_usec) / 1000000.0;
PUSHs(sv = sv_mortalcopy(&sv_no));
sv_setnv(sv, value);
}
RETURN;
#else
DIE("select not implemented");
#endif
}
PP(pp_select)
{
dSP; dTARGET;
GV *oldgv = defoutgv;
if (op->op_private > 0) {
defoutgv = (GV*)POPs;
if (!GvIO(defoutgv))
gv_IOadd(defoutgv);
}
gv_efullname(TARG, oldgv);
XPUSHTARG;
RETURN;
}
PP(pp_getc)
{
dSP; dTARGET;
GV *gv;
if (MAXARG <= 0)
gv = stdingv;
else
gv = (GV*)POPs;
if (!gv)
gv = argvgv;
if (!gv || do_eof(gv)) /* make sure we have fp with something */
RETPUSHUNDEF;
TAINT_IF(1);
sv_setpv(TARG, " ");
*SvPVX(TARG) = getc(IoIFP(GvIOp(gv))); /* should never be EOF */
PUSHTARG;
RETURN;
}
PP(pp_read)
{
return pp_sysread(ARGS);
}
static OP *
doform(cv,gv,retop)
CV *cv;
GV *gv;
OP *retop;
{
register CONTEXT *cx;
I32 gimme = GIMME;
AV* padlist = CvPADLIST(cv);
SV** svp = AvARRAY(padlist);
ENTER;
SAVETMPS;
push_return(retop);
PUSHBLOCK(cx, CXt_SUB, stack_sp);
PUSHFORMAT(cx);
SAVESPTR(curpad);
curpad = AvARRAY((AV*)svp[1]);
defoutgv = gv; /* locally select filehandle so $% et al work */
return CvSTART(cv);
}
PP(pp_enterwrite)
{
dSP;
register GV *gv;
register IO *io;
GV *fgv;
CV *cv;
if (MAXARG == 0)
gv = defoutgv;
else {
gv = (GV*)POPs;
if (!gv)
gv = defoutgv;
}
EXTEND(SP, 1);
io = GvIO(gv);
if (!io) {
RETPUSHNO;
}
if (IoFMT_GV(io))
fgv = IoFMT_GV(io);
else
fgv = gv;
cv = GvFORM(fgv);
if (!cv) {
if (fgv) {
SV *tmpsv = sv_newmortal();
gv_efullname(tmpsv, gv);
DIE("Undefined format \"%s\" called",SvPVX(tmpsv));
}
DIE("Not a format reference");
}
IoFLAGS(io) &= ~IOf_DIDTOP;
return doform(cv,gv,op->op_next);
}
PP(pp_leavewrite)
{
dSP;
GV *gv = cxstack[cxstack_ix].blk_sub.gv;
register IO *io = GvIOp(gv);
FILE *ofp = IoOFP(io);
FILE *fp;
SV **newsp;
I32 gimme;
register CONTEXT *cx;
DEBUG_f(fprintf(stderr,"left=%ld, todo=%ld\n",
(long)IoLINES_LEFT(io), (long)FmLINES(formtarget)));
if (IoLINES_LEFT(io) < FmLINES(formtarget) &&
formtarget != toptarget)
{
if (!IoTOP_GV(io)) {
GV *topgv;
char tmpbuf[256];
if (!IoTOP_NAME(io)) {
if (!IoFMT_NAME(io))
IoFMT_NAME(io) = savepv(GvNAME(gv));
sprintf(tmpbuf, "%s_TOP", IoFMT_NAME(io));
topgv = gv_fetchpv(tmpbuf,FALSE, SVt_PVFM);
if ((topgv && GvFORM(topgv)) ||
!gv_fetchpv("top",FALSE,SVt_PVFM))
IoTOP_NAME(io) = savepv(tmpbuf);
else
IoTOP_NAME(io) = savepv("top");
}
topgv = gv_fetchpv(IoTOP_NAME(io),FALSE, SVt_PVFM);
if (!topgv || !GvFORM(topgv)) {
IoLINES_LEFT(io) = 100000000;
goto forget_top;
}
IoTOP_GV(io) = topgv;
}
if (IoFLAGS(io) & IOf_DIDTOP) { /* Oh dear. It still doesn't fit. */
I32 lines = IoLINES_LEFT(io);
char *s = SvPVX(formtarget);
while (lines-- > 0) {
s = strchr(s, '\n');
if (!s)
break;
s++;
}
if (s) {
fwrite1(SvPVX(formtarget), s - SvPVX(formtarget), 1, ofp);
sv_chop(formtarget, s);
FmLINES(formtarget) -= IoLINES_LEFT(io);
}
}
if (IoLINES_LEFT(io) >= 0 && IoPAGE(io) > 0)
fwrite1(SvPVX(formfeed), SvCUR(formfeed), 1, ofp);
IoLINES_LEFT(io) = IoPAGE_LEN(io);
IoPAGE(io)++;
formtarget = toptarget;
IoFLAGS(io) |= IOf_DIDTOP;
return doform(GvFORM(IoTOP_GV(io)),gv,op);
}
forget_top:
POPBLOCK(cx,curpm);
POPFORMAT(cx);
LEAVE;
fp = IoOFP(io);
if (!fp) {
if (dowarn) {
if (IoIFP(io))
warn("Filehandle only opened for input");
else
warn("Write on closed filehandle");
}
PUSHs(&sv_no);
}
else {
if ((IoLINES_LEFT(io) -= FmLINES(formtarget)) < 0) {
if (dowarn)
warn("page overflow");
}
if (!fwrite1(SvPVX(formtarget), 1, SvCUR(formtarget), ofp) ||
ferror(fp))
PUSHs(&sv_no);
else {
FmLINES(formtarget) = 0;
SvCUR_set(formtarget, 0);
*SvEND(formtarget) = '\0';
if (IoFLAGS(io) & IOf_FLUSH)
(void)fflush(fp);
PUSHs(&sv_yes);
}
}
formtarget = bodytarget;
PUTBACK;
return pop_return();
}
PP(pp_prtf)
{
dSP; dMARK; dORIGMARK;
GV *gv;
IO *io;
FILE *fp;
SV *sv = NEWSV(0,0);
if (op->op_flags & OPf_STACKED)
gv = (GV*)*++MARK;
else
gv = defoutgv;
if (!(io = GvIO(gv))) {
if (dowarn) {
gv_fullname(sv,gv);
warn("Filehandle %s never opened", SvPV(sv,na));
}
SETERRNO(EBADF,RMS$_IFI);
goto just_say_no;
}
else if (!(fp = IoOFP(io))) {
if (dowarn) {
gv_fullname(sv,gv);
if (IoIFP(io))
warn("Filehandle %s opened only for input", SvPV(sv,na));
else
warn("printf on closed filehandle %s", SvPV(sv,na));
}
SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
goto just_say_no;
}
else {
do_sprintf(sv, SP - MARK, MARK + 1);
if (!do_print(sv, fp))
goto just_say_no;
if (IoFLAGS(io) & IOf_FLUSH)
if (fflush(fp) == EOF)
goto just_say_no;
}
SvREFCNT_dec(sv);
SP = ORIGMARK;
PUSHs(&sv_yes);
RETURN;
just_say_no:
SvREFCNT_dec(sv);
SP = ORIGMARK;
PUSHs(&sv_undef);
RETURN;
}
PP(pp_sysread)
{
dSP; dMARK; dORIGMARK; dTARGET;
int offset;
GV *gv;
IO *io;
char *buffer;
int length;
int bufsize;
SV *bufsv;
STRLEN blen;
gv = (GV*)*++MARK;
if (!gv)
goto say_undef;
bufsv = *++MARK;
buffer = SvPV_force(bufsv, blen);
length = SvIVx(*++MARK);
if (length < 0)
DIE("Negative length");
SETERRNO(0,0);
if (MARK < SP)
offset = SvIVx(*++MARK);
else
offset = 0;
io = GvIO(gv);
if (!io || !IoIFP(io))
goto say_undef;
#ifdef HAS_SOCKET
if (op->op_type == OP_RECV) {
bufsize = sizeof buf;
buffer = SvGROW(bufsv, length+1);
length = recvfrom(fileno(IoIFP(io)), buffer, length, offset,
(struct sockaddr *)buf, &bufsize);
if (length < 0)
RETPUSHUNDEF;
SvCUR_set(bufsv, length);
*SvEND(bufsv) = '\0';
(void)SvPOK_only(bufsv);
SvSETMAGIC(bufsv);
if (tainting)
sv_magic(bufsv, Nullsv, 't', Nullch, 0);
SP = ORIGMARK;
sv_setpvn(TARG, buf, bufsize);
PUSHs(TARG);
RETURN;
}
#else
if (op->op_type == OP_RECV)
DIE(no_sock_func, "recv");
#endif
buffer = SvGROW(bufsv, length+offset+1);
if (op->op_type == OP_SYSREAD) {
length = read(fileno(IoIFP(io)), buffer+offset, length);
}
else
#ifdef HAS_SOCKET__bad_code_maybe
if (IoTYPE(io) == 's') {
bufsize = sizeof buf;
length = recvfrom(fileno(IoIFP(io)), buffer+offset, length, 0,
(struct sockaddr *)buf, &bufsize);
}
else
#endif
length = fread(buffer+offset, 1, length, IoIFP(io));
if (length < 0)
goto say_undef;
SvCUR_set(bufsv, length+offset);
*SvEND(bufsv) = '\0';
(void)SvPOK_only(bufsv);
SvSETMAGIC(bufsv);
if (tainting)
sv_magic(bufsv, Nullsv, 't', Nullch, 0);
SP = ORIGMARK;
PUSHi(length);
RETURN;
say_undef:
SP = ORIGMARK;
RETPUSHUNDEF;
}
PP(pp_syswrite)
{