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-rw-r--r--doio.c344
1 files changed, 124 insertions, 220 deletions
diff --git a/doio.c b/doio.c
index d7b964c8b1..7d8e6178de 100644
--- a/doio.c
+++ b/doio.c
@@ -1,54 +1,17 @@
-/* $RCSfile: doio.c,v $$Revision: 4.1 $$Date: 92/08/07 17:19:42 $
+/* doio.c
*
- * Copyright (c) 1991, Larry Wall
+ * 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.
*
- * $Log: doio.c,v $
- * Revision 4.1 92/08/07 17:19:42 lwall
- * Stage 6 Snapshot
- *
- * Revision 4.0.1.6 92/06/11 21:08:16 lwall
- * patch34: some systems don't declare h_errno extern in header files
- *
- * Revision 4.0.1.5 92/06/08 13:00:21 lwall
- * patch20: some machines don't define ENOTSOCK in errno.h
- * patch20: new warnings for failed use of stat operators on filenames with \n
- * patch20: wait failed when STDOUT or STDERR reopened to a pipe
- * patch20: end of file latch not reset on reopen of STDIN
- * patch20: seek(HANDLE, 0, 1) went to eof because of ancient Ultrix workaround
- * patch20: fixed memory leak on system() for vfork() machines
- * patch20: get*by* routines now return something useful in a scalar context
- * patch20: h_errno now accessible via $?
- *
- * Revision 4.0.1.4 91/11/05 16:51:43 lwall
- * patch11: prepared for ctype implementations that don't define isascii()
- * patch11: perl mistook some streams for sockets because they return mode 0 too
- * patch11: reopening STDIN, STDOUT and STDERR failed on some machines
- * patch11: certain perl errors should set EBADF so that $! looks better
- * patch11: truncate on a closed filehandle could dump
- * patch11: stats of _ forgot whether prior stat was actually lstat
- * patch11: -T returned true on NFS directory
- *
- * Revision 4.0.1.3 91/06/10 01:21:19 lwall
- * patch10: read didn't work from character special files open for writing
- * patch10: close-on-exec wrongly set on system file descriptors
- *
- * Revision 4.0.1.2 91/06/07 10:53:39 lwall
- * patch4: new copyright notice
- * patch4: system fd's are now treated specially
- * patch4: added $^F variable to specify maximum system fd, default 2
- * patch4: character special files now opened with bidirectional stdio buffers
- * patch4: taintchecks could improperly modify parent in vfork()
- * patch4: many, many itty-bitty portability fixes
- *
- * Revision 4.0.1.1 91/04/11 17:41:06 lwall
- * patch1: hopefully straightened out some of the Xenix mess
- *
- * Revision 4.0 91/03/20 01:07:06 lwall
- * 4.0 baseline.
- *
+ */
+
+/*
+ * "Far below them they saw the white waters pour into a foaming bowl, and
+ * then swirl darkly about a deep oval basin in the rocks, until they found
+ * their way out again through a narrow gate, and flowed away, fuming and
+ * chattering, into calmer and more level reaches."
*/
#include "EXTERN.h"
@@ -64,6 +27,9 @@
#endif
#ifdef HAS_SHM
#include <sys/shm.h>
+# ifndef HAS_SHMAT_PROTOTYPE
+ extern Shmat_t shmat _((int, char *, int));
+# endif
#endif
#endif
@@ -77,18 +43,26 @@
#include <sys/file.h>
#endif
+/* Omit -- it causes too much grief on mixed systems.
+#ifdef I_UNISTD
+#include <unistd.h>
+#endif
+*/
+
bool
-do_open(gv,name,len)
+do_open(gv,name,len,supplied_fp)
GV *gv;
register char *name;
I32 len;
+FILE *supplied_fp;
{
FILE *fp;
- register IO *io = GvIO(gv);
- char *myname = savestr(name);
+ register IO *io = GvIOn(gv);
+ char *myname = savepv(name);
int result;
int fd;
int writing = 0;
+ int dodup;
char mode[3]; /* stdio file mode ("r\0" or "r+\0") */
FILE *saveifp = Nullfp;
FILE *saveofp = Nullfp;
@@ -100,9 +74,7 @@ I32 len;
forkprocess = 1; /* assume true if no fork */
while (len && isSPACE(name[len-1]))
name[--len] = '\0';
- if (!io)
- io = GvIO(gv) = newIO();
- else if (IoIFP(io)) {
+ if (IoIFP(io)) {
fd = fileno(IoIFP(io));
if (IoTYPE(io) == '-')
result = 0;
@@ -145,6 +117,8 @@ I32 len;
if (strNE(name,"-"))
TAINT_ENV();
TAINT_PROPER("piped open");
+ if (dowarn && name[strlen(name)-1] == '|')
+ warn("Can't do bidirectional pipe");
fp = my_popen(name,"w");
writing = 1;
}
@@ -160,29 +134,41 @@ I32 len;
writing = 1;
if (*name == '&') {
duplicity:
+ dodup = 1;
name++;
- while (isSPACE(*name))
+ if (*name == '=') {
+ dodup = 0;
name++;
- if (isDIGIT(*name))
- fd = atoi(name);
+ }
+ if (!*name && supplied_fp)
+ fp = supplied_fp;
else {
- gv = gv_fetchpv(name,FALSE,SVt_PVIO);
- if (!gv || !GvIO(gv)) {
+ while (isSPACE(*name))
+ name++;
+ if (isDIGIT(*name))
+ fd = atoi(name);
+ else {
+ IO* thatio;
+ gv = gv_fetchpv(name,FALSE,SVt_PVIO);
+ thatio = GvIO(gv);
+ if (!thatio) {
#ifdef EINVAL
- errno = EINVAL;
+ errno = EINVAL;
#endif
- goto say_false;
- }
- if (GvIO(gv) && IoIFP(GvIO(gv))) {
- fd = fileno(IoIFP(GvIO(gv)));
- if (IoTYPE(GvIO(gv)) == 's')
- IoTYPE(io) = 's';
+ goto say_false;
+ }
+ if (IoIFP(thatio)) {
+ fd = fileno(IoIFP(thatio));
+ if (IoTYPE(thatio) == 's')
+ IoTYPE(io) = 's';
+ }
+ else
+ fd = -1;
}
- else
- fd = -1;
- }
- if (!(fp = fdopen(fd = dup(fd),mode))) {
- close(fd);
+ if (dodup)
+ fd = dup(fd);
+ if (!(fp = fdopen(fd,mode)))
+ close(fd);
}
}
else {
@@ -243,7 +229,7 @@ I32 len;
}
if (IoTYPE(io) &&
IoTYPE(io) != '|' && IoTYPE(io) != '-') {
- if (fstat(fileno(fp),&statbuf) < 0) {
+ if (Fstat(fileno(fp),&statbuf) < 0) {
(void)fclose(fp);
goto say_false;
}
@@ -257,8 +243,8 @@ I32 len;
!statbuf.st_mode
#endif
) {
- I32 buflen = sizeof tokenbuf;
- if (getsockname(fileno(fp), tokenbuf, &buflen) >= 0
+ int buflen = sizeof tokenbuf;
+ if (getsockname(fileno(fp), (struct sockaddr *)tokenbuf, &buflen) >= 0
|| errno != ENOTSOCK)
IoTYPE(io) = 's'; /* some OS's return 0 on fstat()ed socket */
/* but some return 0 for streams too, sigh */
@@ -281,11 +267,11 @@ I32 len;
dup2(fileno(fp), fd);
sv = *av_fetch(fdpid,fileno(fp),TRUE);
- SvUPGRADE(sv, SVt_IV);
+ (void)SvUPGRADE(sv, SVt_IV);
pid = SvIVX(sv);
SvIVX(sv) = 0;
sv = *av_fetch(fdpid,fd,TRUE);
- SvUPGRADE(sv, SVt_IV);
+ (void)SvUPGRADE(sv, SVt_IV);
SvIVX(sv) = pid;
fclose(fp);
@@ -293,9 +279,9 @@ I32 len;
fp = saveifp;
clearerr(fp);
}
-#if defined(HAS_FCNTL) && defined(FFt_SETFD)
+#if defined(HAS_FCNTL) && defined(F_SETFD)
fd = fileno(fp);
- fcntl(fd,FFt_SETFD,fd > maxsysfd);
+ fcntl(fd,F_SETFD,fd > maxsysfd);
#endif
IoIFP(io) = fp;
if (writing) {
@@ -334,7 +320,7 @@ register GV *gv;
if (!argvoutgv)
argvoutgv = gv_fetchpv("ARGVOUT",TRUE,SVt_PVIO);
if (filemode & (S_ISUID|S_ISGID)) {
- fflush(IoIFP(GvIO(argvoutgv))); /* chmod must follow last write */
+ fflush(IoIFP(GvIOn(argvoutgv))); /* chmod must follow last write */
#ifdef HAS_FCHMOD
(void)fchmod(lastfd,filemode);
#else
@@ -349,12 +335,12 @@ register GV *gv;
sv_setsv(GvSV(gv),sv);
SvSETMAGIC(GvSV(gv));
oldname = SvPVx(GvSV(gv), len);
- if (do_open(gv,oldname,len)) {
+ if (do_open(gv,oldname,len,Nullfp)) {
if (inplace) {
TAINT_PROPER("inplace open");
if (strEQ(oldname,"-")) {
defoutgv = gv_fetchpv("STDOUT",TRUE,SVt_PVIO);
- return IoIFP(GvIO(gv));
+ return IoIFP(GvIOp(gv));
}
#ifndef FLEXFILENAMES
filedev = statbuf.st_dev;
@@ -376,7 +362,7 @@ register GV *gv;
sv_catpv(sv,inplace);
#endif
#ifndef FLEXFILENAMES
- if (stat(SvPVX(sv),&statbuf) >= 0
+ if (Stat(SvPVX(sv),&statbuf) >= 0
&& statbuf.st_dev == filedev
&& statbuf.st_ino == fileino ) {
warn("Can't do inplace edit: %s > 14 characters",
@@ -397,7 +383,7 @@ register GV *gv;
do_close(gv,FALSE);
(void)unlink(SvPVX(sv));
(void)rename(oldname,SvPVX(sv));
- do_open(gv,SvPVX(sv),SvCUR(GvSV(gv)));
+ do_open(gv,SvPVX(sv),SvCUR(GvSV(gv)),Nullfp);
#endif /* MSDOS */
#else
(void)UNLINK(SvPVX(sv));
@@ -426,15 +412,15 @@ register GV *gv;
sv_setpvn(sv,">",1);
sv_catpv(sv,oldname);
errno = 0; /* in case sprintf set errno */
- if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv))) {
+ if (!do_open(argvoutgv,SvPVX(sv),SvCUR(sv),Nullfp)) {
warn("Can't do inplace edit on %s: %s",
oldname, Strerror(errno) );
do_close(gv,FALSE);
continue;
}
defoutgv = argvoutgv;
- lastfd = fileno(IoIFP(GvIO(argvoutgv)));
- (void)fstat(lastfd,&statbuf);
+ lastfd = fileno(IoIFP(GvIOp(argvoutgv)));
+ (void)Fstat(lastfd,&statbuf);
#ifdef HAS_FCHMOD
(void)fchmod(lastfd,filemode);
#else
@@ -450,7 +436,7 @@ register GV *gv;
#endif
}
}
- return IoIFP(GvIO(gv));
+ return IoIFP(GvIOp(gv));
}
else
fprintf(stderr,"Can't open %s: %s\n",SvPV(sv, na), Strerror(errno));
@@ -478,16 +464,12 @@ GV *wgv;
if (!wgv)
goto badexit;
- rstio = GvIO(rgv);
- wstio = GvIO(wgv);
+ rstio = GvIOn(rgv);
+ wstio = GvIOn(wgv);
- if (!rstio)
- rstio = GvIO(rgv) = newIO();
- else if (IoIFP(rstio))
+ if (IoIFP(rstio))
do_close(rgv,FALSE);
- if (!wstio)
- wstio = GvIO(wgv) = newIO();
- else if (IoIFP(wstio))
+ if (IoIFP(wstio))
do_close(wgv,FALSE);
if (pipe(fd) < 0)
@@ -515,13 +497,13 @@ badexit:
#endif
bool
-#ifndef STANDARD_C
+#ifndef CAN_PROTOTYPE
do_close(gv,explicit)
GV *gv;
bool explicit;
#else
do_close(GV *gv, bool explicit)
-#endif /* STANDARD_C */
+#endif /* CAN_PROTOTYPE */
{
bool retval = FALSE;
register IO *io;
@@ -529,7 +511,7 @@ do_close(GV *gv, bool explicit)
if (!gv)
gv = argvgv;
- if (!gv) {
+ if (!gv || SvTYPE(gv) != SVt_PVGV) {
errno = EBADF;
return FALSE;
}
@@ -660,79 +642,7 @@ nuts:
return FALSE;
}
-I32
-do_ctl(optype,gv,func,argstr)
-I32 optype;
-GV *gv;
-I32 func;
-SV *argstr;
-{
- register IO *io;
- register char *s;
- I32 retval;
-
- if (!gv || !argstr || !(io = GvIO(gv)) || !IoIFP(io)) {
- errno = EBADF; /* well, sort of... */
- return -1;
- }
-
- if (SvPOK(argstr) || !SvNIOK(argstr)) {
- if (!SvPOK(argstr))
- s = SvPV(argstr, na);
-
-#ifdef IOCPARM_MASK
-#ifndef IOCPARM_LEN
-#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)
-#endif
-#endif
-#ifdef IOCPARM_LEN
- retval = IOCPARM_LEN(func); /* on BSDish systes we're safe */
-#else
- retval = 256; /* otherwise guess at what's safe */
-#endif
- if (SvCUR(argstr) < retval) {
- Sv_Grow(argstr,retval+1);
- SvCUR_set(argstr, retval);
- }
-
- s = SvPVX(argstr);
- s[SvCUR(argstr)] = 17; /* a little sanity check here */
- }
- else {
- retval = SvIV(argstr);
-#ifdef DOSISH
- s = (char*)(long)retval; /* ouch */
-#else
- s = (char*)retval; /* ouch */
-#endif
- }
-
-#ifndef lint
- if (optype == OP_IOCTL)
- retval = ioctl(fileno(IoIFP(io)), func, s);
- else
-#ifdef DOSISH
- croak("fcntl is not implemented");
-#else
-#ifdef HAS_FCNTL
- retval = fcntl(fileno(IoIFP(io)), func, s);
-#else
- croak("fcntl is not implemented");
-#endif
-#endif
-#else /* lint */
- retval = 0;
-#endif /* lint */
-
- if (SvPOK(argstr)) {
- if (s[SvCUR(argstr)] != 17)
- croak("Return value overflowed string");
- s[SvCUR(argstr)] = 0; /* put our null back */
- }
- return retval;
-}
-
-#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(FFt_FREESP)
+#if !defined(HAS_TRUNCATE) && !defined(HAS_CHSIZE) && defined(F_FREESP)
/* code courtesy of William Kucharski */
#define HAS_CHSIZE
@@ -744,7 +654,7 @@ Off_t length; /* length to set file to */
struct flock fl;
struct stat filebuf;
- if (fstat(fd, &filebuf) < 0)
+ if (Fstat(fd, &filebuf) < 0)
return -1;
if (filebuf.st_size < length) {
@@ -765,24 +675,24 @@ Off_t length; /* length to set file to */
fl.l_whence = 0;
fl.l_len = 0;
fl.l_start = length;
- fl.l_type = FFt_WRLCK; /* write lock on file space */
+ fl.l_type = F_WRLCK; /* write lock on file space */
/*
- * This relies on the UNDOCUMENTED FFt_FREESP argument to
+ * This relies on the UNDOCUMENTED F_FREESP argument to
* fcntl(2), which truncates the file so that it ends at the
* position indicated by fl.l_start.
*
* Will minor miracles never cease?
*/
- if (fcntl(fd, FFt_FREESP, &fl) < 0)
+ if (fcntl(fd, F_FREESP, &fl) < 0)
return -1;
}
return 0;
}
-#endif /* FFt_FREESP */
+#endif /* F_FREESP */
I32
looks_like_number(sv)
@@ -840,7 +750,6 @@ register SV *sv;
FILE *fp;
{
register char *tmps;
- SV* tmpstr;
STRLEN len;
/* assuming fp is checked earlier */
@@ -865,15 +774,18 @@ FILE *fp;
warn(warn_uninit);
return TRUE;
case SVt_IV:
- if (SvGMAGICAL(sv))
- mg_get(sv);
- fprintf(fp, "%d", SvIVX(sv));
- return !ferror(fp);
+ if (SvIOK(sv)) {
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+ fprintf(fp, "%ld", (long)SvIVX(sv));
+ return !ferror(fp);
+ }
+ /* FALL THROUGH */
default:
tmps = SvPV(sv, len);
break;
}
- if (len && (fwrite(tmps,1,len,fp) == 0 || ferror(fp)))
+ if (len && (fwrite1(tmps,1,len,fp) == 0 || ferror(fp)))
return FALSE;
return TRUE;
}
@@ -885,14 +797,14 @@ dARGS
dSP;
IO *io;
- if (op->op_flags & OPf_SPECIAL) {
+ if (op->op_flags & OPf_REF) {
EXTEND(sp,1);
io = GvIO(cGVOP->op_gv);
if (io && IoIFP(io)) {
statgv = cGVOP->op_gv;
sv_setpv(statname,"");
laststype = OP_STAT;
- return (laststatval = fstat(fileno(IoIFP(io)), &statcache));
+ return (laststatval = Fstat(fileno(IoIFP(io)), &statcache));
}
else {
if (cGVOP->op_gv == defgv)
@@ -911,7 +823,7 @@ dARGS
statgv = Nullgv;
sv_setpv(statname,SvPV(sv, na));
laststype = OP_STAT;
- laststatval = stat(SvPV(sv, na),&statcache);
+ laststatval = Stat(SvPV(sv, na),&statcache);
if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
warn(warn_nl, "stat");
return laststatval;
@@ -924,7 +836,7 @@ dARGS
{
dSP;
SV *sv;
- if (op->op_flags & OPf_SPECIAL) {
+ if (op->op_flags & OPf_REF) {
EXTEND(sp,1);
if (cGVOP->op_gv == defgv) {
if (laststype != OP_LSTAT)
@@ -942,7 +854,7 @@ dARGS
#ifdef HAS_LSTAT
laststatval = lstat(SvPV(sv, na),&statcache);
#else
- laststatval = stat(SvPV(sv, na),&statcache);
+ laststatval = Stat(SvPV(sv, na),&statcache);
#endif
if (laststatval < 0 && dowarn && strchr(SvPV(sv, na), '\n'))
warn(warn_nl, "lstat");
@@ -974,6 +886,8 @@ register SV **sp;
execvp(tmps,Argv);
else
execvp(Argv[0],Argv);
+ if (dowarn)
+ warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
}
do_execfree();
return FALSE;
@@ -1047,7 +961,7 @@ char *cmd;
}
}
New(402,Argv, (s - cmd) / 2 + 2, char*);
- Cmd = nsavestr(cmd, s-cmd);
+ Cmd = savepvn(cmd, s-cmd);
a = Argv;
for (s = Cmd; *s;) {
while (*s && isSPACE(*s)) s++;
@@ -1064,6 +978,8 @@ char *cmd;
do_execfree();
goto doshell;
}
+ if (dowarn)
+ warn("Can't exec \"%s\": %s", Argv[0], Strerror(errno));
}
do_execfree();
return FALSE;
@@ -1104,9 +1020,9 @@ register SV **sp;
case OP_CHOWN:
TAINT_PROPER("chown");
if (sp - mark > 2) {
- tot = sp - mark;
val = SvIVx(*++mark);
val2 = SvIVx(*++mark);
+ tot = sp - mark;
while (++mark <= sp) {
if (chown(SvPVx(*mark, na),val,val2))
tot--;
@@ -1160,7 +1076,7 @@ register SV **sp;
#ifdef HAS_LSTAT
if (lstat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
#else
- if (stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
+ if (Stat(s,&statbuf) < 0 || S_ISDIR(statbuf.st_mode))
#endif
tot--;
else {
@@ -1170,6 +1086,7 @@ register SV **sp;
}
}
break;
+#ifdef HAS_UTIME
case OP_UTIME:
TAINT_PROPER("utime");
if (sp - mark > 2) {
@@ -1194,12 +1111,13 @@ register SV **sp;
else
tot = 0;
break;
+#endif
}
return tot;
}
/* Do the permissions allow some operation? Assumes statcache already set. */
-
+#ifndef VMS /* VMS' cando is in vms.c */
I32
cando(bit, effective, statbufp)
I32 bit;
@@ -1253,6 +1171,7 @@ register struct stat *statbufp;
return FALSE;
#endif /* ! MSDOS */
}
+#endif /* ! VMS */
I32
ingroup(testgid,effective)
@@ -1266,7 +1185,7 @@ I32 effective;
#define NGROUPS 32
#endif
{
- GROUPSTYPE gary[NGROUPS];
+ Groups_t gary[NGROUPS];
I32 anum;
anum = getgroups(NGROUPS,gary);
@@ -1323,7 +1242,8 @@ SV **sp;
{
SV *astr;
char *a;
- I32 id, n, cmd, infosize, getinfo, ret;
+ I32 id, n, cmd, infosize, getinfo;
+ I32 ret = -1;
id = SvIVx(*++mark);
n = (optype == OP_SEMCTL) ? SvIVx(*++mark) : 0;
@@ -1370,20 +1290,14 @@ SV **sp;
if (infosize)
{
+ STRLEN len;
if (getinfo)
{
- if (SvTHINKFIRST(astr)) {
- if (SvREADONLY(astr))
- croak("Can't %s to readonly var", op_name[optype]);
- if (SvROK(astr))
- sv_unref(astr);
- }
- SvGROW(astr, infosize+1);
- a = SvPV(astr, na);
+ SvPV_force(astr, len);
+ a = SvGROW(astr, infosize+1);
}
else
{
- STRLEN len;
a = SvPV(astr, len);
if (len != infosize)
croak("Bad arg length for %s, is %d, should be %d",
@@ -1417,6 +1331,7 @@ SV **sp;
if (getinfo && ret >= 0) {
SvCUR_set(astr, infosize);
*SvEND(astr) = '\0';
+ SvSETMAGIC(astr);
}
return ret;
}
@@ -1468,11 +1383,9 @@ SV **sp;
if (SvROK(mstr))
sv_unref(mstr);
}
- mbuf = SvPV(mstr, len);
- if (len < sizeof(long)+msize+1) {
- SvGROW(mstr, sizeof(long)+msize+1);
- mbuf = SvPV(mstr, len);
- }
+ SvPV_force(mstr, len);
+ mbuf = SvGROW(mstr, sizeof(long)+msize+1);
+
errno = 0;
ret = msgrcv(id, (struct msgbuf *)mbuf, msize, mtype, flags);
if (ret >= 0) {
@@ -1523,9 +1436,6 @@ SV **sp;
I32 id, mpos, msize;
STRLEN len;
struct shmid_ds shmds;
-#ifndef VOIDSHMAT
- extern char *shmat P((int, char *, int));
-#endif
id = SvIVx(*++mark);
mstr = *++mark;
@@ -1538,28 +1448,22 @@ SV **sp;
errno = EFAULT; /* can't do as caller requested */
return -1;
}
- shm = (char*)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
+ shm = (Shmat_t)shmat(id, (char*)NULL, (optype == OP_SHMREAD) ? SHM_RDONLY : 0);
if (shm == (char *)-1) /* I hate System V IPC, I really do */
return -1;
- mbuf = SvPV(mstr, len);
if (optype == OP_SHMREAD) {
- if (SvTHINKFIRST(mstr)) {
- if (SvREADONLY(mstr))
- croak("Can't shmread to readonly var");
- if (SvROK(mstr))
- sv_unref(mstr);
- }
- if (len < msize) {
- SvGROW(mstr, msize+1);
- mbuf = SvPV(mstr, len);
- }
+ SvPV_force(mstr, len);
+ mbuf = SvGROW(mstr, msize+1);
+
Copy(shm + mpos, mbuf, msize, char);
SvCUR_set(mstr, msize);
*SvEND(mstr) = '\0';
+ SvSETMAGIC(mstr);
}
else {
I32 n;
+ mbuf = SvPV(mstr, len);
if ((n = len) > msize)
n = msize;
Copy(mbuf, shm + mpos, n, char);
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