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mg.c
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mg.c
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/* mg.c
*
* Copyright (c) 1991-2000, 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.
*
*/
/*
* "Sam sat on the ground and put his head in his hands. 'I wish I had never
* come here, and I don't want to see no more magic,' he said, and fell silent."
*/
#include "EXTERN.h"
#define PERL_IN_MG_C
#include "perl.h"
/* XXX If this causes problems, set i_unistd=undef in the hint file. */
#ifdef I_UNISTD
# include <unistd.h>
#endif
#if defined(HAS_GETGROUPS) || defined(HAS_SETGROUPS)
# ifndef NGROUPS
# define NGROUPS 32
# endif
#endif
static void restore_magic(pTHXo_ void *p);
static void unwind_handler_stack(pTHXo_ void *p);
/*
* Use the "DESTRUCTOR" scope cleanup to reinstate magic.
*/
struct magic_state {
SV* mgs_sv;
U32 mgs_flags;
I32 mgs_ss_ix;
};
/* MGS is typedef'ed to struct magic_state in perl.h */
STATIC void
S_save_magic(pTHX_ I32 mgs_ix, SV *sv)
{
dTHR;
MGS* mgs;
assert(SvMAGICAL(sv));
SAVEDESTRUCTOR_X(restore_magic, (void*)mgs_ix);
mgs = SSPTR(mgs_ix, MGS*);
mgs->mgs_sv = sv;
mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
mgs->mgs_ss_ix = PL_savestack_ix; /* points after the saved destructor */
SvMAGICAL_off(sv);
SvREADONLY_off(sv);
SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
}
/*
=for apidoc mg_magical
Turns on the magical status of an SV. See C<sv_magic>.
=cut
*/
void
Perl_mg_magical(pTHX_ SV *sv)
{
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl) {
if (vtbl->svt_get && !(mg->mg_flags & MGf_GSKIP))
SvGMAGICAL_on(sv);
if (vtbl->svt_set)
SvSMAGICAL_on(sv);
if (!(SvFLAGS(sv) & (SVs_GMG|SVs_SMG)) || vtbl->svt_clear)
SvRMAGICAL_on(sv);
}
}
}
/*
=for apidoc mg_get
Do magic after a value is retrieved from the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_get(pTHX_ SV *sv)
{
dTHR;
I32 mgs_ix;
MAGIC* mg;
MAGIC** mgp;
int mgp_valid = 0;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
mgp = &SvMAGIC(sv);
while ((mg = *mgp) != 0) {
MGVTBL* vtbl = mg->mg_virtual;
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
CALL_FPTR(vtbl->svt_get)(aTHX_ sv, mg);
/* Ignore this magic if it's been deleted */
if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
(mg->mg_flags & MGf_GSKIP))
(SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
}
/* Advance to next magic (complicated by possible deletion) */
if (mg == (mgp_valid ? *mgp : SvMAGIC(sv))) {
mgp = &mg->mg_moremagic;
mgp_valid = 1;
}
else
mgp = &SvMAGIC(sv); /* Re-establish pointer after sv_upgrade */
}
restore_magic(aTHXo_ (void*)mgs_ix);
return 0;
}
/*
=for apidoc mg_set
Do magic after a value is assigned to the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_set(pTHX_ SV *sv)
{
dTHR;
I32 mgs_ix;
MAGIC* mg;
MAGIC* nextmg;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = nextmg) {
MGVTBL* vtbl = mg->mg_virtual;
nextmg = mg->mg_moremagic; /* it may delete itself */
if (mg->mg_flags & MGf_GSKIP) {
mg->mg_flags &= ~MGf_GSKIP; /* setting requires another read */
(SSPTR(mgs_ix, MGS*))->mgs_flags = 0;
}
if (vtbl && vtbl->svt_set)
CALL_FPTR(vtbl->svt_set)(aTHX_ sv, mg);
}
restore_magic(aTHXo_ (void*)mgs_ix);
return 0;
}
/*
=for apidoc mg_length
Report on the SV's length. See C<sv_magic>.
=cut
*/
U32
Perl_mg_length(pTHX_ SV *sv)
{
MAGIC* mg;
char *junk;
STRLEN len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
I32 mgs_ix;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
restore_magic(aTHXo_ (void*)mgs_ix);
return len;
}
}
junk = SvPV(sv, len);
return len;
}
I32
Perl_mg_size(pTHX_ SV *sv)
{
MAGIC* mg;
I32 len;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl && vtbl->svt_len) {
I32 mgs_ix;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
/* omit MGf_GSKIP -- not changed here */
len = CALL_FPTR(vtbl->svt_len)(aTHX_ sv, mg);
restore_magic(aTHXo_ (void*)mgs_ix);
return len;
}
}
switch(SvTYPE(sv)) {
case SVt_PVAV:
len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
return len;
case SVt_PVHV:
/* FIXME */
default:
Perl_croak(aTHX_ "Size magic not implemented");
break;
}
return 0;
}
/*
=for apidoc mg_clear
Clear something magical that the SV represents. See C<sv_magic>.
=cut
*/
int
Perl_mg_clear(pTHX_ SV *sv)
{
I32 mgs_ix;
MAGIC* mg;
mgs_ix = SSNEW(sizeof(MGS));
save_magic(mgs_ix, sv);
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
/* omit GSKIP -- never set here */
if (vtbl && vtbl->svt_clear)
CALL_FPTR(vtbl->svt_clear)(aTHX_ sv, mg);
}
restore_magic(aTHXo_ (void*)mgs_ix);
return 0;
}
/*
=for apidoc mg_find
Finds the magic pointer for type matching the SV. See C<sv_magic>.
=cut
*/
MAGIC*
Perl_mg_find(pTHX_ SV *sv, int type)
{
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
if (mg->mg_type == type)
return mg;
}
return 0;
}
/*
=for apidoc mg_copy
Copies the magic from one SV to another. See C<sv_magic>.
=cut
*/
int
Perl_mg_copy(pTHX_ SV *sv, SV *nsv, const char *key, I32 klen)
{
int count = 0;
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
if (isUPPER(mg->mg_type)) {
sv_magic(nsv,
mg->mg_type == 'P' ? SvTIED_obj(sv, mg) :
(mg->mg_type == 'D' && mg->mg_obj) ? sv : mg->mg_obj,
toLOWER(mg->mg_type), key, klen);
count++;
}
}
return count;
}
/*
=for apidoc mg_free
Free any magic storage used by the SV. See C<sv_magic>.
=cut
*/
int
Perl_mg_free(pTHX_ SV *sv)
{
MAGIC* mg;
MAGIC* moremagic;
for (mg = SvMAGIC(sv); mg; mg = moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
moremagic = mg->mg_moremagic;
if (vtbl && vtbl->svt_free)
CALL_FPTR(vtbl->svt_free)(aTHX_ sv, mg);
if (mg->mg_ptr && mg->mg_type != 'g')
if (mg->mg_len >= 0)
Safefree(mg->mg_ptr);
else if (mg->mg_len == HEf_SVKEY)
SvREFCNT_dec((SV*)mg->mg_ptr);
if (mg->mg_flags & MGf_REFCOUNTED)
SvREFCNT_dec(mg->mg_obj);
Safefree(mg);
}
SvMAGIC(sv) = 0;
return 0;
}
#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
#endif
U32
Perl_magic_regdata_cnt(pTHX_ SV *sv, MAGIC *mg)
{
dTHR;
register REGEXP *rx;
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (mg->mg_obj) /* @+ */
return rx->nparens;
else /* @- */
return rx->lastparen;
}
return (U32)-1;
}
int
Perl_magic_regdatum_get(pTHX_ SV *sv, MAGIC *mg)
{
dTHR;
register I32 paren;
register I32 s;
register I32 i;
register REGEXP *rx;
I32 t;
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
paren = mg->mg_len;
if (paren < 0)
return 0;
if (paren <= rx->nparens &&
(s = rx->startp[paren]) != -1 &&
(t = rx->endp[paren]) != -1)
{
if (mg->mg_obj) /* @+ */
i = t;
else /* @- */
i = s;
sv_setiv(sv,i);
}
}
return 0;
}
int
Perl_magic_regdatum_set(pTHX_ SV *sv, MAGIC *mg)
{
dTHR;
Perl_croak(aTHX_ PL_no_modify);
/* NOT REACHED */
return 0;
}
U32
Perl_magic_len(pTHX_ SV *sv, MAGIC *mg)
{
dTHR;
register I32 paren;
register I32 i;
register REGEXP *rx;
I32 s1, t1;
switch (*mg->mg_ptr) {
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
paren = atoi(mg->mg_ptr);
getparen:
if (paren <= rx->nparens &&
(s1 = rx->startp[paren]) != -1 &&
(t1 = rx->endp[paren]) != -1)
{
i = t1 - s1;
getlen:
if (i > 0 && (PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE) {
char *s = rx->subbeg + s1;
char *send = rx->subbeg + t1;
i = 0;
while (s < send) {
s += UTF8SKIP(s);
i++;
}
}
if (i >= 0)
return i;
}
}
return 0;
case '+':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
return 0;
case '`':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (rx->startp[0] != -1) {
i = rx->startp[0];
if (i > 0) {
s1 = 0;
t1 = i;
goto getlen;
}
}
}
return 0;
case '\'':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (rx->endp[0] != -1) {
i = rx->sublen - rx->endp[0];
if (i > 0) {
s1 = rx->endp[0];
t1 = rx->sublen;
goto getlen;
}
}
}
return 0;
case ',':
return (STRLEN)PL_ofslen;
case '\\':
return (STRLEN)PL_orslen;
}
magic_get(sv,mg);
if (!SvPOK(sv) && SvNIOK(sv)) {
STRLEN n_a;
sv_2pv(sv, &n_a);
}
if (SvPOK(sv))
return SvCUR(sv);
return 0;
}
int
Perl_magic_get(pTHX_ SV *sv, MAGIC *mg)
{
dTHR;
register I32 paren;
register char *s;
register I32 i;
register REGEXP *rx;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(sv, PL_bodytarget);
break;
case '\003': /* ^C */
sv_setiv(sv, (IV)PL_minus_c);
break;
case '\004': /* ^D */
sv_setiv(sv, (IV)(PL_debug & 32767));
#if defined(YYDEBUG) && defined(DEBUGGING)
PL_yydebug = (PL_debug & 1);
#endif
break;
case '\005': /* ^E */
#ifdef MACOS_TRADITIONAL
{
char msg[256];
sv_setnv(sv,(double)gMacPerl_OSErr);
sv_setpv(sv, gMacPerl_OSErr ? GetSysErrText(gMacPerl_OSErr, msg) : "");
}
#else
#ifdef VMS
{
# include <descrip.h>
# include <starlet.h>
char msg[255];
$DESCRIPTOR(msgdsc,msg);
sv_setnv(sv,(NV) vaxc$errno);
if (sys$getmsg(vaxc$errno,&msgdsc.dsc$w_length,&msgdsc,0,0) & 1)
sv_setpvn(sv,msgdsc.dsc$a_pointer,msgdsc.dsc$w_length);
else
sv_setpv(sv,"");
}
#else
#ifdef OS2
if (!(_emx_env & 0x200)) { /* Under DOS */
sv_setnv(sv, (NV)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
} else {
if (errno != errno_isOS2) {
int tmp = _syserrno();
if (tmp) /* 2nd call to _syserrno() makes it 0 */
Perl_rc = tmp;
}
sv_setnv(sv, (NV)Perl_rc);
sv_setpv(sv, os2error(Perl_rc));
}
#else
#ifdef WIN32
{
DWORD dwErr = GetLastError();
sv_setnv(sv, (NV)dwErr);
if (dwErr)
{
PerlProc_GetOSError(sv, dwErr);
}
else
sv_setpv(sv, "");
SetLastError(dwErr);
}
#else
sv_setnv(sv, (NV)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
#endif
#endif
#endif
#endif
SvNOK_on(sv); /* what a wonderful hack! */
break;
case '\006': /* ^F */
sv_setiv(sv, (IV)PL_maxsysfd);
break;
case '\010': /* ^H */
sv_setiv(sv, (IV)PL_hints);
break;
case '\011': /* ^I */ /* NOT \t in EBCDIC */
if (PL_inplace)
sv_setpv(sv, PL_inplace);
else
sv_setsv(sv, &PL_sv_undef);
break;
case '\017': /* ^O */
sv_setpv(sv, PL_osname);
break;
case '\020': /* ^P */
sv_setiv(sv, (IV)PL_perldb);
break;
case '\023': /* ^S */
{
dTHR;
if (PL_lex_state != LEX_NOTPARSING)
(void)SvOK_off(sv);
else if (PL_in_eval)
sv_setiv(sv, 1);
else
sv_setiv(sv, 0);
}
break;
case '\024': /* ^T */
#ifdef BIG_TIME
sv_setnv(sv, PL_basetime);
#else
sv_setiv(sv, (IV)PL_basetime);
#endif
break;
case '\027': /* ^W & $^WARNING_BITS & ^WIDE_SYSTEM_CALLS */
if (*(mg->mg_ptr+1) == '\0')
sv_setiv(sv, (IV)((PL_dowarn & G_WARN_ON) ? TRUE : FALSE));
else if (strEQ(mg->mg_ptr, "\027ARNING_BITS")) {
if (PL_compiling.cop_warnings == pWARN_NONE ||
PL_compiling.cop_warnings == pWARN_STD)
{
sv_setpvn(sv, WARN_NONEstring, WARNsize) ;
}
else if (PL_compiling.cop_warnings == pWARN_ALL) {
sv_setpvn(sv, WARN_ALLstring, WARNsize) ;
}
else {
sv_setsv(sv, PL_compiling.cop_warnings);
}
SvPOK_only(sv);
}
else if (strEQ(mg->mg_ptr, "\027IDE_SYSTEM_CALLS"))
sv_setiv(sv, (IV)PL_widesyscalls);
break;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
I32 s1, t1;
/*
* Pre-threads, this was paren = atoi(GvENAME((GV*)mg->mg_obj));
* XXX Does the new way break anything?
*/
paren = atoi(mg->mg_ptr);
getparen:
if (paren <= rx->nparens &&
(s1 = rx->startp[paren]) != -1 &&
(t1 = rx->endp[paren]) != -1)
{
i = t1 - s1;
s = rx->subbeg + s1;
if (!rx->subbeg)
break;
getrx:
if (i >= 0) {
bool was_tainted;
if (PL_tainting) {
was_tainted = PL_tainted;
PL_tainted = FALSE;
}
sv_setpvn(sv, s, i);
if ((PL_curpm->op_pmdynflags & PMdf_UTF8) && !IN_BYTE)
SvUTF8_on(sv);
else
SvUTF8_off(sv);
if (PL_tainting)
PL_tainted = (was_tainted || RX_MATCH_TAINTED(rx));
break;
}
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '+':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
sv_setsv(sv,&PL_sv_undef);
break;
case '`':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if ((s = rx->subbeg) && rx->startp[0] != -1) {
i = rx->startp[0];
goto getrx;
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '\'':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (rx->subbeg && rx->endp[0] != -1) {
s = rx->subbeg + rx->endp[0];
i = rx->sublen - rx->endp[0];
goto getrx;
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '.':
#ifndef lint
if (GvIO(PL_last_in_gv)) {
sv_setiv(sv, (IV)IoLINES(GvIO(PL_last_in_gv)));
}
#endif
break;
case '?':
{
sv_setiv(sv, (IV)STATUS_CURRENT);
#ifdef COMPLEX_STATUS
LvTARGOFF(sv) = PL_statusvalue;
LvTARGLEN(sv) = PL_statusvalue_vms;
#endif
}
break;
case '^':
s = IoTOP_NAME(GvIOp(PL_defoutgv));
if (s)
sv_setpv(sv,s);
else {
sv_setpv(sv,GvENAME(PL_defoutgv));
sv_catpv(sv,"_TOP");
}
break;
case '~':
s = IoFMT_NAME(GvIOp(PL_defoutgv));
if (!s)
s = GvENAME(PL_defoutgv);
sv_setpv(sv,s);
break;
#ifndef lint
case '=':
sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(PL_defoutgv)));
break;
case '-':
sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(PL_defoutgv)));
break;
case '%':
sv_setiv(sv, (IV)IoPAGE(GvIOp(PL_defoutgv)));
break;
#endif
case ':':
break;
case '/':
break;
case '[':
WITH_THR(sv_setiv(sv, (IV)PL_curcop->cop_arybase));
break;
case '|':
sv_setiv(sv, (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0 );
break;
case ',':
sv_setpvn(sv,PL_ofs,PL_ofslen);
break;
case '\\':
sv_setpvn(sv,PL_ors,PL_orslen);
break;
case '#':
sv_setpv(sv,PL_ofmt);
break;
case '!':
#ifdef VMS
sv_setnv(sv, (NV)((errno == EVMSERR) ? vaxc$errno : errno));
sv_setpv(sv, errno ? Strerror(errno) : "");
#else
{
int saveerrno = errno;
sv_setnv(sv, (NV)errno);
#ifdef OS2
if (errno == errno_isOS2 || errno == errno_isOS2_set)
sv_setpv(sv, os2error(Perl_rc));
else
#endif
sv_setpv(sv, errno ? Strerror(errno) : "");
errno = saveerrno;
}
#endif
SvNOK_on(sv); /* what a wonderful hack! */
break;
case '<':
sv_setiv(sv, (IV)PL_uid);
break;
case '>':
sv_setiv(sv, (IV)PL_euid);
break;
case '(':
sv_setiv(sv, (IV)PL_gid);
#ifdef HAS_GETGROUPS
Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_gid);
#endif
goto add_groups;
case ')':
sv_setiv(sv, (IV)PL_egid);
#ifdef HAS_GETGROUPS
Perl_sv_setpvf(aTHX_ sv, "%"Gid_t_f, PL_egid);
#endif
add_groups:
#ifdef HAS_GETGROUPS
{
Groups_t gary[NGROUPS];
i = getgroups(NGROUPS,gary);
while (--i >= 0)
Perl_sv_catpvf(aTHX_ sv, " %"Gid_t_f, gary[i]);
}
#endif
(void)SvIOK_on(sv); /* what a wonderful hack! */
break;
case '*':
break;
#ifndef MACOS_TRADITIONAL
case '0':
break;
#endif
#ifdef USE_THREADS
case '@':
sv_setsv(sv, thr->errsv);
break;
#endif /* USE_THREADS */
}
return 0;
}
int
Perl_magic_getuvar(pTHX_ SV *sv, MAGIC *mg)
{
struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
if (uf && uf->uf_val)
(*uf->uf_val)(uf->uf_index, sv);
return 0;
}
int
Perl_magic_setenv(pTHX_ SV *sv, MAGIC *mg)
{
register char *s;
char *ptr;
STRLEN len, klen;
I32 i;
s = SvPV(sv,len);
ptr = MgPV(mg,klen);
my_setenv(ptr, s);
#ifdef DYNAMIC_ENV_FETCH
/* We just undefd an environment var. Is a replacement */
/* waiting in the wings? */
if (!len) {
SV **valp;
if ((valp = hv_fetch(GvHVn(PL_envgv), ptr, klen, FALSE)))
s = SvPV(*valp, len);
}
#endif
#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32) && !defined(MSDOS)
/* And you'll never guess what the dog had */
/* in its mouth... */
if (PL_tainting) {
MgTAINTEDDIR_off(mg);
#ifdef VMS
if (s && klen == 8 && strEQ(ptr, "DCL$PATH")) {
char pathbuf[256], eltbuf[256], *cp, *elt = s;
struct stat sbuf;
int i = 0, j = 0;
do { /* DCL$PATH may be a search list */
while (1) { /* as may dev portion of any element */
if ( ((cp = strchr(elt,'[')) || (cp = strchr(elt,'<'))) ) {
if ( *(cp+1) == '.' || *(cp+1) == '-' ||
cando_by_name(S_IWUSR,0,elt) ) {
MgTAINTEDDIR_on(mg);
return 0;
}
}
if ((cp = strchr(elt, ':')) != Nullch)
*cp = '\0';
if (my_trnlnm(elt, eltbuf, j++))
elt = eltbuf;
else
break;
}
j = 0;
} while (my_trnlnm(s, pathbuf, i++) && (elt = pathbuf));
}
#endif /* VMS */
if (s && klen == 4 && strEQ(ptr,"PATH")) {
char *strend = s + len;
while (s < strend) {
char tmpbuf[256];
struct stat st;
s = delimcpy(tmpbuf, tmpbuf + sizeof tmpbuf,
s, strend, ':', &i);
s++;
if (i >= sizeof tmpbuf /* too long -- assume the worst */
|| *tmpbuf != '/'
|| (PerlLIO_stat(tmpbuf, &st) == 0 && (st.st_mode & 2)) ) {
MgTAINTEDDIR_on(mg);
return 0;
}
}
}
}
#endif /* neither OS2 nor AMIGAOS nor WIN32 nor MSDOS */
return 0;
}
int
Perl_magic_clearenv(pTHX_ SV *sv, MAGIC *mg)
{
STRLEN n_a;
my_setenv(MgPV(mg,n_a),Nullch);
return 0;
}
int
Perl_magic_set_all_env(pTHX_ SV *sv, MAGIC *mg)
{
#if defined(VMS)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
dTHR;
if (PL_localizing) {
HE* entry;
STRLEN n_a;
magic_clear_all_env(sv,mg);
hv_iterinit((HV*)sv);
while ((entry = hv_iternext((HV*)sv))) {
I32 keylen;
my_setenv(hv_iterkey(entry, &keylen),
SvPV(hv_iterval((HV*)sv, entry), n_a));
}
}
#endif
return 0;
}
int
Perl_magic_clear_all_env(pTHX_ SV *sv, MAGIC *mg)
{
#if defined(VMS)
Perl_die(aTHX_ "Can't make list assignment to %%ENV on this system");
#else
# ifdef PERL_IMPLICIT_SYS
PerlEnv_clearenv();
# else
# ifdef WIN32
char *envv = GetEnvironmentStrings();
char *cur = envv;
STRLEN len;
while (*cur) {
char *end = strchr(cur,'=');
if (end && end != cur) {
*end = '\0';
my_setenv(cur,Nullch);
*end = '=';
cur = end + strlen(end+1)+2;
}
else if ((len = strlen(cur)))
cur += len+1;
}
FreeEnvironmentStrings(envv);
# else
# ifdef __CYGWIN__
I32 i;
for (i = 0; environ[i]; i++)
safesysfree(environ[i]);
# else
# ifndef PERL_USE_SAFE_PUTENV
I32 i;
if (environ == PL_origenviron)
environ = (char**)safesysmalloc(sizeof(char*));
else
for (i = 0; environ[i]; i++)
safesysfree(environ[i]);
# endif /* PERL_USE_SAFE_PUTENV */
# endif /* __CYGWIN__ */
environ[0] = Nullch;
# endif /* WIN32 */
# endif /* PERL_IMPLICIT_SYS */
#endif /* VMS */
return 0;
}
#ifndef PERL_MICRO
int
Perl_magic_getsig(pTHX_ SV *sv, MAGIC *mg)
{
I32 i;
STRLEN n_a;
/* Are we fetching a signal entry? */
i = whichsig(MgPV(mg,n_a));
if (i) {
if(PL_psig_ptr[i])
sv_setsv(sv,PL_psig_ptr[i]);
else {
Sighandler_t sigstate = rsignal_state(i);
/* cache state so we don't fetch it again */
if(sigstate == SIG_IGN)
sv_setpv(sv,"IGNORE");
else
sv_setsv(sv,&PL_sv_undef);
PL_psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv);
}
}
return 0;
}
int
Perl_magic_clearsig(pTHX_ SV *sv, MAGIC *mg)
{
I32 i;
STRLEN n_a;
/* Are we clearing a signal entry? */
i = whichsig(MgPV(mg,n_a));
if (i) {
if(PL_psig_ptr[i]) {
SvREFCNT_dec(PL_psig_ptr[i]);