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|
/* mg.c
*
* Copyright (c) 1991-1997, 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"
#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
/*
* Use the "DESTRUCTOR" scope cleanup to reinstate magic.
*/
struct magic_state {
SV* mgs_sv;
U32 mgs_flags;
};
typedef struct magic_state MGS;
static void restore_magic _((void *p));
static void
save_magic(mgs, sv)
MGS* mgs;
SV* sv;
{
assert(SvMAGICAL(sv));
mgs->mgs_sv = sv;
mgs->mgs_flags = SvMAGICAL(sv) | SvREADONLY(sv);
SAVEDESTRUCTOR(restore_magic, mgs);
SvMAGICAL_off(sv);
SvREADONLY_off(sv);
SvFLAGS(sv) |= (SvFLAGS(sv) & (SVp_IOK|SVp_NOK|SVp_POK)) >> PRIVSHIFT;
}
static void
restore_magic(p)
void* p;
{
MGS* mgs = (MGS*)p;
SV* sv = mgs->mgs_sv;
if (SvTYPE(sv) >= SVt_PVMG && SvMAGIC(sv))
{
if (mgs->mgs_flags)
SvFLAGS(sv) |= mgs->mgs_flags;
else
mg_magical(sv);
if (SvGMAGICAL(sv))
SvFLAGS(sv) &= ~(SVf_IOK|SVf_NOK|SVf_POK);
}
}
void
mg_magical(sv)
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);
}
}
}
int
mg_get(sv)
SV* sv;
{
MGS mgs;
MAGIC* mg;
MAGIC** mgp;
int mgp_valid = 0;
ENTER;
save_magic(&mgs, sv);
mgp = &SvMAGIC(sv);
while ((mg = *mgp) != 0) {
MGVTBL* vtbl = mg->mg_virtual;
if (!(mg->mg_flags & MGf_GSKIP) && vtbl && vtbl->svt_get) {
(*vtbl->svt_get)(sv, mg);
/* Ignore this magic if it's been deleted */
if ((mg == (mgp_valid ? *mgp : SvMAGIC(sv))) &&
(mg->mg_flags & MGf_GSKIP))
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 */
}
LEAVE;
return 0;
}
int
mg_set(sv)
SV* sv;
{
MGS mgs;
MAGIC* mg;
MAGIC* nextmg;
ENTER;
save_magic(&mgs, 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 */
mgs.mgs_flags = 0;
}
if (vtbl && vtbl->svt_set)
(*vtbl->svt_set)(sv, mg);
}
LEAVE;
return 0;
}
U32
mg_len(sv)
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) {
MGS mgs;
ENTER;
save_magic(&mgs, sv);
/* omit MGf_GSKIP -- not changed here */
len = (*vtbl->svt_len)(sv, mg);
LEAVE;
return len;
}
}
junk = SvPV(sv, len);
return len;
}
int
mg_clear(sv)
SV* sv;
{
MGS mgs;
MAGIC* mg;
ENTER;
save_magic(&mgs, 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)
(*vtbl->svt_clear)(sv, mg);
}
LEAVE;
return 0;
}
MAGIC*
mg_find(sv, type)
SV* sv;
int type;
{
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
if (mg->mg_type == type)
return mg;
}
return 0;
}
int
mg_copy(sv, nsv, key, klen)
SV* sv;
SV* nsv;
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_obj, toLOWER(mg->mg_type), key, klen);
count++;
}
}
return count;
}
int
mg_free(sv)
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)
(*vtbl->svt_free)(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
magic_len(sv, mg)
SV *sv;
MAGIC *mg;
{
register I32 paren;
register char *s;
register I32 i;
register REGEXP *rx;
char *t;
switch (*mg->mg_ptr) {
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (curpm && (rx = curpm->op_pmregexp)) {
paren = atoi(mg->mg_ptr);
getparen:
if (paren <= rx->nparens &&
(s = rx->startp[paren]) &&
(t = rx->endp[paren]))
{
i = t - s;
if (i >= 0)
return i;
}
}
return 0;
case '+':
if (curpm && (rx = curpm->op_pmregexp)) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
return 0;
case '`':
if (curpm && (rx = curpm->op_pmregexp)) {
if ((s = rx->subbeg) && rx->startp[0]) {
i = rx->startp[0] - s;
if (i >= 0)
return i;
}
}
return 0;
case '\'':
if (curpm && (rx = curpm->op_pmregexp)) {
if (rx->subend && (s = rx->endp[0])) {
i = rx->subend - s;
if (i >= 0)
return i;
}
}
return 0;
case ',':
return (STRLEN)ofslen;
case '\\':
return (STRLEN)orslen;
}
magic_get(sv,mg);
if (!SvPOK(sv) && SvNIOK(sv))
sv_2pv(sv, &na);
if (SvPOK(sv))
return SvCUR(sv);
return 0;
}
int
magic_get(sv, mg)
SV *sv;
MAGIC *mg;
{
register I32 paren;
register char *s;
register I32 i;
register REGEXP *rx;
char *t;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(sv, bodytarget);
break;
case '\004': /* ^D */
sv_setiv(sv, (IV)(debug & 32767));
break;
case '\005': /* ^E */
#ifdef VMS
{
# include <descrip.h>
# include <starlet.h>
char msg[255];
$DESCRIPTOR(msgdsc,msg);
sv_setnv(sv,(double) vaxc$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, (double)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
} else {
if (errno != errno_isOS2)
Perl_rc = _syserrno();
sv_setnv(sv, (double)Perl_rc);
sv_setpv(sv, os2error(Perl_rc));
}
#else
sv_setnv(sv, (double)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
#endif
#endif
SvNOK_on(sv); /* what a wonderful hack! */
break;
case '\006': /* ^F */
sv_setiv(sv, (IV)maxsysfd);
break;
case '\010': /* ^H */
sv_setiv(sv, (IV)hints);
break;
case '\t': /* ^I */
if (inplace)
sv_setpv(sv, inplace);
else
sv_setsv(sv, &sv_undef);
break;
case '\017': /* ^O */
sv_setpv(sv, osname);
break;
case '\020': /* ^P */
sv_setiv(sv, (IV)perldb);
break;
case '\023': /* ^S */
if (lex_state != LEX_NOTPARSING)
SvOK_off(sv);
else if (in_eval)
sv_setiv(sv, 1);
else
sv_setiv(sv, 0);
break;
case '\024': /* ^T */
#ifdef BIG_TIME
sv_setnv(sv, basetime);
#else
sv_setiv(sv, (IV)basetime);
#endif
break;
case '\027': /* ^W */
sv_setiv(sv, (IV)dowarn);
break;
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': case '&':
if (curpm && (rx = curpm->op_pmregexp)) {
paren = atoi(GvENAME((GV*)mg->mg_obj));
getparen:
if (paren <= rx->nparens &&
(s = rx->startp[paren]) &&
(t = rx->endp[paren]))
{
i = t - s;
getrx:
if (i >= 0) {
bool was_tainted;
if (tainting) {
was_tainted = tainted;
tainted = FALSE;
}
sv_setpvn(sv,s,i);
if (tainting)
tainted = was_tainted || rx->exec_tainted;
break;
}
}
}
sv_setsv(sv,&sv_undef);
break;
case '+':
if (curpm && (rx = curpm->op_pmregexp)) {
paren = rx->lastparen;
if (paren)
goto getparen;
}
sv_setsv(sv,&sv_undef);
break;
case '`':
if (curpm && (rx = curpm->op_pmregexp)) {
if ((s = rx->subbeg) && rx->startp[0]) {
i = rx->startp[0] - s;
goto getrx;
}
}
sv_setsv(sv,&sv_undef);
break;
case '\'':
if (curpm && (rx = curpm->op_pmregexp)) {
if (rx->subend && (s = rx->endp[0])) {
i = rx->subend - s;
goto getrx;
}
}
sv_setsv(sv,&sv_undef);
break;
case '.':
#ifndef lint
if (GvIO(last_in_gv)) {
sv_setiv(sv, (IV)IoLINES(GvIO(last_in_gv)));
}
#endif
break;
case '?':
sv_setiv(sv, (IV)STATUS_CURRENT);
#ifdef COMPLEX_STATUS
LvTARGOFF(sv) = statusvalue;
LvTARGLEN(sv) = statusvalue_vms;
#endif
break;
case '^':
s = IoTOP_NAME(GvIOp(defoutgv));
if (s)
sv_setpv(sv,s);
else {
sv_setpv(sv,GvENAME(defoutgv));
sv_catpv(sv,"_TOP");
}
break;
case '~':
s = IoFMT_NAME(GvIOp(defoutgv));
if (!s)
s = GvENAME(defoutgv);
sv_setpv(sv,s);
break;
#ifndef lint
case '=':
sv_setiv(sv, (IV)IoPAGE_LEN(GvIOp(defoutgv)));
break;
case '-':
sv_setiv(sv, (IV)IoLINES_LEFT(GvIOp(defoutgv)));
break;
case '%':
sv_setiv(sv, (IV)IoPAGE(GvIOp(defoutgv)));
break;
#endif
case ':':
break;
case '/':
break;
case '[':
sv_setiv(sv, (IV)curcop->cop_arybase);
break;
case '|':
sv_setiv(sv, (IV)(IoFLAGS(GvIOp(defoutgv)) & IOf_FLUSH) != 0 );
break;
case ',':
sv_setpvn(sv,ofs,ofslen);
break;
case '\\':
sv_setpvn(sv,ors,orslen);
break;
case '#':
sv_setpv(sv,ofmt);
break;
case '!':
#ifdef VMS
sv_setnv(sv, (double)((errno == EVMSERR) ? vaxc$errno : errno));
sv_setpv(sv, errno ? Strerror(errno) : "");
#else
{
int saveerrno = errno;
sv_setnv(sv, (double)errno);
#ifdef OS2
if (errno == errno_isOS2) 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)uid);
break;
case '>':
sv_setiv(sv, (IV)euid);
break;
case '(':
sv_setiv(sv, (IV)gid);
sv_setpvf(sv, "%Vd", (IV)gid);
goto add_groups;
case ')':
sv_setiv(sv, (IV)egid);
sv_setpvf(sv, "%Vd", (IV)egid);
add_groups:
#ifdef HAS_GETGROUPS
{
Groups_t gary[NGROUPS];
i = getgroups(NGROUPS,gary);
while (--i >= 0)
sv_catpvf(sv, " %Vd", (IV)gary[i]);
}
#endif
SvIOK_on(sv); /* what a wonderful hack! */
break;
case '*':
break;
case '0':
break;
}
return 0;
}
int
magic_getuvar(sv, mg)
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
magic_setenv(sv,mg)
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(envgv), ptr, klen, FALSE)))
s = SvPV(*valp, len);
}
#endif
#if !defined(OS2) && !defined(AMIGAOS) && !defined(WIN32)
/* And you'll never guess what the dog had */
/* in its mouth... */
if (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) {
struct stat st;
s = delimcpy(tokenbuf, tokenbuf + sizeof tokenbuf,
s, strend, ':', &i);
s++;
if (i >= sizeof tokenbuf /* too long -- assume the worst */
|| *tokenbuf != '/'
|| (Stat(tokenbuf, &st) == 0 && (st.st_mode & 2)) ) {
MgTAINTEDDIR_on(mg);
return 0;
}
}
}
}
#endif /* neither OS2 nor AMIGAOS nor WIN32 */
return 0;
}
int
magic_clearenv(sv,mg)
SV* sv;
MAGIC* mg;
{
my_setenv(MgPV(mg,na),Nullch);
return 0;
}
int
magic_set_all_env(sv,mg)
SV* sv;
MAGIC* mg;
{
#if defined(VMS)
die("Can't make list assignment to %%ENV on this system");
#else
if (localizing) {
HE* entry;
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), na));
}
}
#endif
return 0;
}
int
magic_clear_all_env(sv,mg)
SV* sv;
MAGIC* mg;
{
#if defined(VMS)
die("Can't make list assignment to %%ENV on this system");
#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 += strlen(end+1)+1;
}
else if ((len = strlen(cur)))
cur += len+1;
}
FreeEnvironmentStrings(envv);
#else
I32 i;
if (environ == origenviron)
New(901, environ, 1, char*);
else
for (i = 0; environ[i]; i++)
Safefree(environ[i]);
environ[0] = Nullch;
#endif
#endif
return 0;
}
int
magic_getsig(sv,mg)
SV* sv;
MAGIC* mg;
{
I32 i;
/* Are we fetching a signal entry? */
i = whichsig(MgPV(mg,na));
if (i) {
if(psig_ptr[i])
sv_setsv(sv,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,&sv_undef);
psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv);
}
}
return 0;
}
int
magic_clearsig(sv,mg)
SV* sv;
MAGIC* mg;
{
I32 i;
/* Are we clearing a signal entry? */
i = whichsig(MgPV(mg,na));
if (i) {
if(psig_ptr[i]) {
SvREFCNT_dec(psig_ptr[i]);
psig_ptr[i]=0;
}
if(psig_name[i]) {
SvREFCNT_dec(psig_name[i]);
psig_name[i]=0;
}
}
return 0;
}
int
magic_setsig(sv,mg)
SV* sv;
MAGIC* mg;
{
register char *s;
I32 i;
SV** svp;
s = MgPV(mg,na);
if (*s == '_') {
if (strEQ(s,"__DIE__"))
svp = &diehook;
else if (strEQ(s,"__WARN__"))
svp = &warnhook;
else if (strEQ(s,"__PARSE__"))
svp = &parsehook;
else
croak("No such hook: %s", s);
i = 0;
if (*svp) {
SvREFCNT_dec(*svp);
*svp = 0;
}
}
else {
i = whichsig(s); /* ...no, a brick */
if (!i) {
if (dowarn || strEQ(s,"ALARM"))
warn("No such signal: SIG%s", s);
return 0;
}
SvREFCNT_dec(psig_name[i]);
SvREFCNT_dec(psig_ptr[i]);
psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv); /* Make sure it doesn't go away on us */
psig_name[i] = newSVpv(s, strlen(s));
SvREADONLY_on(psig_name[i]);
}
if (SvTYPE(sv) == SVt_PVGV || SvROK(sv)) {
if (i)
(void)rsignal(i, sighandler);
else
*svp = SvREFCNT_inc(sv);
return 0;
}
s = SvPV_force(sv,na);
if (strEQ(s,"IGNORE")) {
if (i)
(void)rsignal(i, SIG_IGN);
else
*svp = 0;
}
else if (strEQ(s,"DEFAULT") || !*s) {
if (i)
(void)rsignal(i, SIG_DFL);
else
*svp = 0;
}
else {
/*
* We should warn if HINT_STRICT_REFS, but without
* access to a known hint bit in a known OP, we can't
* tell whether HINT_STRICT_REFS is in force or not.
*/
if (!strchr(s,':') && !strchr(s,'\''))
sv_setpv(sv, form("main::%s", s));
if (i)
(void)rsignal(i, sighandler);
else
*svp = SvREFCNT_inc(sv);
}
return 0;
}
int
magic_setisa(sv,mg)
SV* sv;
MAGIC* mg;
{
sub_generation++;
return 0;
}
#ifdef OVERLOAD
int
magic_setamagic(sv,mg)
SV* sv;
MAGIC* mg;
{
/* HV_badAMAGIC_on(Sv_STASH(sv)); */
amagic_generation++;
return 0;
}
#endif /* OVERLOAD */
int
magic_setnkeys(sv,mg)
SV* sv;
MAGIC* mg;
{
if (LvTARG(sv)) {
hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
LvTARG(sv) = Nullsv; /* Don't allow a ref to reassign this. */
}
return 0;
}
static int
magic_methpack(sv,mg,meth)
SV* sv;
MAGIC* mg;
char *meth;
{
dSP;
ENTER;
SAVETMPS;
PUSHMARK(sp);
EXTEND(sp, 2);
PUSHs(mg->mg_obj);
if (mg->mg_ptr) {
if (mg->mg_len >= 0)
PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
else if (mg->mg_len == HEf_SVKEY)
PUSHs((SV*)mg->mg_ptr);
}
else if (mg->mg_type == 'p')
PUSHs(sv_2mortal(newSViv(mg->mg_len)));
PUTBACK;
if (perl_call_method(meth, G_SCALAR))
sv_setsv(sv, *stack_sp--);
FREETMPS;
LEAVE;
return 0;
}
int
magic_getpack(sv,mg)
SV* sv;
MAGIC* mg;
{
magic_methpack(sv,mg,"FETCH");
if (mg->mg_ptr)
mg->mg_flags |= MGf_GSKIP;
return 0;
}
int
magic_setpack(sv,mg)
SV* sv;
MAGIC* mg;
{
dSP;
PUSHMARK(sp);
EXTEND(sp, 3);
PUSHs(mg->mg_obj);
if (mg->mg_ptr) {
if (mg->mg_len >= 0)
PUSHs(sv_2mortal(newSVpv(mg->mg_ptr, mg->mg_len)));
else if (mg->mg_len == HEf_SVKEY)
PUSHs((SV*)mg->mg_ptr);
}
else if (mg->mg_type == 'p')
PUSHs(sv_2mortal(newSViv(mg->mg_len)));
PUSHs(sv);
PUTBACK;
perl_call_method("STORE", G_SCALAR|G_DISCARD);
return 0;
}
int
magic_clearpack(sv,mg)
SV* sv;
MAGIC* mg;
{
return magic_methpack(sv,mg,"DELETE");
}
int magic_wipepack(sv,mg)
SV* sv;
MAGIC* mg;
{
dSP;
PUSHMARK(sp);
XPUSHs(mg->mg_obj);
PUTBACK;
perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
return 0;
}
int
magic_nextpack(sv,mg,key)
SV* sv;
MAGIC* mg;
SV* key;
{
dSP;
char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
ENTER;
SAVETMPS;
PUSHMARK(sp);
EXTEND(sp, 2);
PUSHs(mg->mg_obj);
if (SvOK(key))
PUSHs(key);
PUTBACK;
if (perl_call_method(meth, G_SCALAR))
sv_setsv(key, *stack_sp--);
FREETMPS;
LEAVE;
return 0;
}
int
magic_existspack(sv,mg)
SV* sv;
MAGIC* mg;
{
return magic_methpack(sv,mg,"EXISTS");
}
int
magic_setdbline(sv,mg)
SV* sv;
MAGIC* mg;
{
OP *o;
I32 i;
GV* gv;
SV** svp;
gv = DBline;
i = SvTRUE(sv);
svp = av_fetch(GvAV(gv),
atoi(MgPV(mg,na)), FALSE);
if (svp && SvIOKp(*svp) && (o = (OP*)SvSTASH(*svp)))
o->op_private = i;
else
warn("Can't break at that line\n");
return 0;
}
int
magic_getarylen(sv,mg)
SV* sv;
MAGIC* mg;
{
sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + curcop->cop_arybase);
return 0;
}
int
magic_setarylen(sv,mg)
SV* sv;
MAGIC* mg;
{
av_fill((AV*)mg->mg_obj, SvIV(sv) - curcop->cop_arybase);
return 0;
}
int
magic_getpos(sv,mg)
SV* sv;
MAGIC* mg;
{
SV* lsv = LvTARG(sv);
if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv)) {
mg = mg_find(lsv, 'g');
if (mg && mg->mg_len >= 0) {
sv_setiv(sv, mg->mg_len + curcop->cop_arybase);
return 0;
}
}
(void)SvOK_off(sv);
return 0;
}
int
magic_setpos(sv,mg)
SV* sv;
MAGIC* mg;
{
SV* lsv = LvTARG(sv);
SSize_t pos;
STRLEN len;
mg = 0;
if (SvTYPE(lsv) >= SVt_PVMG && SvMAGIC(lsv))
mg = mg_find(lsv, 'g');
if (!mg) {
if (!SvOK(sv))
return 0;
sv_magic(lsv, (SV*)0, 'g', Nullch, 0);
mg = mg_find(lsv, 'g');
}
else if (!SvOK(sv)) {
mg->mg_len = -1;
return 0;
}
len = SvPOK(lsv) ? SvCUR(lsv) : sv_len(lsv);
pos = SvIV(sv) - curcop->cop_arybase;
if (pos < 0) {
pos += len;
if (pos < 0)
pos = 0;
}
else if (pos > len)
pos = len;
mg->mg_len = pos;
mg->mg_flags &= ~MGf_MINMATCH;
return 0;
}
int
magic_getglob(sv,mg)
SV* sv;
MAGIC* mg;
{
if (SvFAKE(sv)) { /* FAKE globs can get coerced */
SvFAKE_off(sv);
gv_efullname3(sv,((GV*)sv), "*");
SvFAKE_on(sv);
}
else
gv_efullname3(sv,((GV*)sv), "*"); /* a gv value, be nice */
return 0;
}
int
magic_setglob(sv,mg)
SV* sv;
MAGIC* mg;
{
register char *s;
GV* gv;
if (!SvOK(sv))
return 0;
s = SvPV(sv, na);
if (*s == '*' && s[1])
s++;
gv = gv_fetchpv(s,TRUE, SVt_PVGV);
if (sv == (SV*)gv)
return 0;
if (GvGP(sv))
gp_free((GV*)sv);
GvGP(sv) = gp_ref(GvGP(gv));
return 0;
}
int
magic_setsubstr(sv,mg)
SV* sv;
MAGIC* mg;
{
STRLEN len;
char *tmps = SvPV(sv,len);
sv_insert(LvTARG(sv),LvTARGOFF(sv),LvTARGLEN(sv), tmps, len);
return 0;
}
int
magic_gettaint(sv,mg)
SV* sv;
MAGIC* mg;
{
TAINT_IF((mg->mg_len & 1) ||
(mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
return 0;
}
int
magic_settaint(sv,mg)
SV* sv;
MAGIC* mg;
{
if (localizing) {
if (localizing == 1)
mg->mg_len <<= 1;
else
mg->mg_len >>= 1;
}
else if (tainted)
mg->mg_len |= 1;
else
mg->mg_len &= ~1;
return 0;
}
int
magic_setvec(sv,mg)
SV* sv;
MAGIC* mg;
{
do_vecset(sv); /* XXX slurp this routine */
return 0;
}
int
magic_getdefelem(sv,mg)
SV* sv;
MAGIC* mg;
{
SV *targ = Nullsv;
if (LvTARGLEN(sv)) {
if (mg->mg_obj) {
HV* hv = (HV*)LvTARG(sv);
HE* he = hv_fetch_ent(hv, mg->mg_obj, FALSE, 0);
if (he)
targ = HeVAL(he);
}
else {
AV* av = (AV*)LvTARG(sv);
if ((I32)LvTARGOFF(sv) <= AvFILL(av))
targ = AvARRAY(av)[LvTARGOFF(sv)];
}
if (targ && targ != &sv_undef) {
/* somebody else defined it for us */
SvREFCNT_dec(LvTARG(sv));
LvTARG(sv) = SvREFCNT_inc(targ);
LvTARGLEN(sv) = 0;
SvREFCNT_dec(mg->mg_obj);
mg->mg_obj = Nullsv;
mg->mg_flags &= ~MGf_REFCOUNTED;
}
}
else
targ = LvTARG(sv);
sv_setsv(sv, targ ? targ : &sv_undef);
return 0;
}
int
magic_setdefelem(sv,mg)
SV* sv;
MAGIC* mg;
{
if (LvTARGLEN(sv))
vivify_defelem(sv);
if (LvTARG(sv)) {
sv_setsv(LvTARG(sv), sv);
SvSETMAGIC(LvTARG(sv));
}
return 0;
}
int
magic_freedefelem(sv,mg)
SV* sv;
MAGIC* mg;
{
SvREFCNT_dec(LvTARG(sv));
return 0;
}
void
vivify_defelem(sv)
SV* sv;
{
MAGIC* mg;
SV* value;
if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
return;
if (mg->mg_obj) {
HV* hv = (HV*)LvTARG(sv);
HE* he = hv_fetch_ent(hv, mg->mg_obj, TRUE, 0);
if (!he || (value = HeVAL(he)) == &sv_undef)
croak(no_helem, SvPV(mg->mg_obj, na));
}
else {
AV* av = (AV*)LvTARG(sv);
if ((I32)LvTARGLEN(sv) < 0 && (I32)LvTARGOFF(sv) > AvFILL(av))
LvTARG(sv) = Nullsv; /* array can't be extended */
else {
SV** svp = av_fetch(av, LvTARGOFF(sv), TRUE);
if (!svp || (value = *svp) == &sv_undef)
croak(no_aelem, (I32)LvTARGOFF(sv));
}
}
(void)SvREFCNT_inc(value);
SvREFCNT_dec(LvTARG(sv));
LvTARG(sv) = value;
LvTARGLEN(sv) = 0;
SvREFCNT_dec(mg->mg_obj);
mg->mg_obj = Nullsv;
mg->mg_flags &= ~MGf_REFCOUNTED;
}
int
magic_setmglob(sv,mg)
SV* sv;
MAGIC* mg;
{
mg->mg_len = -1;
SvSCREAM_off(sv);
return 0;
}
int
magic_setbm(sv,mg)
SV* sv;
MAGIC* mg;
{
sv_unmagic(sv, 'B');
SvVALID_off(sv);
return 0;
}
int
magic_setfm(sv,mg)
SV* sv;
MAGIC* mg;
{
sv_unmagic(sv, 'f');
SvCOMPILED_off(sv);
return 0;
}
int
magic_setuvar(sv,mg)
SV* sv;
MAGIC* mg;
{
struct ufuncs *uf = (struct ufuncs *)mg->mg_ptr;
if (uf && uf->uf_set)
(*uf->uf_set)(uf->uf_index, sv);
return 0;
}
#ifdef USE_LOCALE_COLLATE
int
magic_setcollxfrm(sv,mg)
SV* sv;
MAGIC* mg;
{
/*
* René Descartes said "I think not."
* and vanished with a faint plop.
*/
if (mg->mg_ptr) {
Safefree(mg->mg_ptr);
mg->mg_ptr = NULL;
mg->mg_len = -1;
}
return 0;
}
#endif /* USE_LOCALE_COLLATE */
int
magic_set(sv,mg)
SV* sv;
MAGIC* mg;
{
register char *s;
I32 i;
STRLEN len;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(bodytarget, sv);
break;
case '\004': /* ^D */
debug = (SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) | 0x80000000;
DEBUG_x(dump_all());
break;
case '\005': /* ^E */
#ifdef VMS
set_vaxc_errno(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
#else
/* will anyone ever use this? */
SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
#endif
break;
case '\006': /* ^F */
maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\010': /* ^H */
hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\t': /* ^I */
if (inplace)
Safefree(inplace);
if (SvOK(sv))
inplace = savepv(SvPV(sv,na));
else
inplace = Nullch;
break;
case '\017': /* ^O */
if (osname)
Safefree(osname);
if (SvOK(sv))
osname = savepv(SvPV(sv,na));
else
osname = Nullch;
break;
case '\020': /* ^P */
perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\024': /* ^T */
#ifdef BIG_TIME
basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
#else
basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
#endif
break;
case '\027': /* ^W */
dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '.':
if (localizing) {
if (localizing == 1)
save_sptr((SV**)&last_in_gv);
}
else if (SvOK(sv) && GvIO(last_in_gv))
IoLINES(GvIOp(last_in_gv)) = (long)SvIV(sv);
break;
case '^':
Safefree(IoTOP_NAME(GvIOp(defoutgv)));
IoTOP_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
IoTOP_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '~':
Safefree(IoFMT_NAME(GvIOp(defoutgv)));
IoFMT_NAME(GvIOp(defoutgv)) = s = savepv(SvPV(sv,na));
IoFMT_GV(GvIOp(defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '=':
IoPAGE_LEN(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '-':
IoLINES_LEFT(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
if (IoLINES_LEFT(GvIOp(defoutgv)) < 0L)
IoLINES_LEFT(GvIOp(defoutgv)) = 0L;
break;
case '%':
IoPAGE(GvIOp(defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '|':
{
IO *io = GvIOp(defoutgv);
if ((SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)) == 0)
IoFLAGS(io) &= ~IOf_FLUSH;
else {
if (!(IoFLAGS(io) & IOf_FLUSH)) {
PerlIO *ofp = IoOFP(io);
if (ofp)
(void)PerlIO_flush(ofp);
IoFLAGS(io) |= IOf_FLUSH;
}
}
}
break;
case '*':
i = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
multiline = (i != 0);
break;
case '/':
SvREFCNT_dec(nrs);
nrs = newSVsv(sv);
SvREFCNT_dec(rs);
rs = SvREFCNT_inc(nrs);
break;
case '\\':
if (ors)
Safefree(ors);
if (SvOK(sv) || SvGMAGICAL(sv))
ors = savepv(SvPV(sv,orslen));
else {
ors = Nullch;
orslen = 0;
}
break;
case ',':
if (ofs)
Safefree(ofs);
ofs = savepv(SvPV(sv, ofslen));
break;
case '#':
if (ofmt)
Safefree(ofmt);
ofmt = savepv(SvPV(sv,na));
break;
case '[':
compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '?':
#ifdef COMPLEX_STATUS
if (localizing == 2) {
statusvalue = LvTARGOFF(sv);
statusvalue_vms = LvTARGLEN(sv);
}
else
#endif
#ifdef VMSISH_STATUS
if (VMSISH_STATUS)
STATUS_NATIVE_SET((U32)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv)));
else
#endif
STATUS_POSIX_SET(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '!':
SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv),
(SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
break;
case '<':
uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (delaymagic) {
delaymagic |= DM_RUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRUID
(void)setruid((Uid_t)uid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)uid, (Uid_t)-1);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)uid, (Uid_t)-1, (Uid_t)-1);
#else
if (uid == euid) /* special case $< = $> */
(void)setuid(uid);
else {
uid = (I32)getuid();
croak("setruid() not implemented");
}
#endif
#endif
#endif
uid = (I32)getuid();
tainting |= (uid && (euid != uid || egid != gid));
break;
case '>':
euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (delaymagic) {
delaymagic |= DM_EUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEUID
(void)seteuid((Uid_t)euid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1, (Uid_t)euid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1, (Uid_t)euid, (Uid_t)-1);
#else
if (euid == uid) /* special case $> = $< */
setuid(euid);
else {
euid = (I32)geteuid();
croak("seteuid() not implemented");
}
#endif
#endif
#endif
euid = (I32)geteuid();
tainting |= (uid && (euid != uid || egid != gid));
break;
case '(':
gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (delaymagic) {
delaymagic |= DM_RGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRGID
(void)setrgid((Gid_t)gid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)gid, (Gid_t)-1);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)gid, (Gid_t)-1, (Gid_t) 1);
#else
if (gid == egid) /* special case $( = $) */
(void)setgid(gid);
else {
gid = (I32)getgid();
croak("setrgid() not implemented");
}
#endif
#endif
#endif
gid = (I32)getgid();
tainting |= (uid && (euid != uid || egid != gid));
break;
case ')':
#ifdef HAS_SETGROUPS
{
char *p = SvPV(sv, na);
Groups_t gary[NGROUPS];
SET_NUMERIC_STANDARD();
while (isSPACE(*p))
++p;
egid = I_V(atof(p));
for (i = 0; i < NGROUPS; ++i) {
while (*p && !isSPACE(*p))
++p;
while (isSPACE(*p))
++p;
if (!*p)
break;
gary[i] = I_V(atof(p));
}
if (i)
(void)setgroups(i, gary);
}
#else /* HAS_SETGROUPS */
egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
#endif /* HAS_SETGROUPS */
if (delaymagic) {
delaymagic |= DM_EGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEGID
(void)setegid((Gid_t)egid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)-1, (Gid_t)egid);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)-1, (Gid_t)egid, (Gid_t)-1);
#else
if (egid == gid) /* special case $) = $( */
(void)setgid(egid);
else {
egid = (I32)getegid();
croak("setegid() not implemented");
}
#endif
#endif
#endif
egid = (I32)getegid();
tainting |= (uid && (euid != uid || egid != gid));
break;
case ':':
chopset = SvPV_force(sv,na);
break;
case '0':
if (!origalen) {
s = origargv[0];
s += strlen(s);
/* See if all the arguments are contiguous in memory */
for (i = 1; i < origargc; i++) {
if (origargv[i] == s + 1
#ifdef OS2
|| origargv[i] == s + 2
#endif
)
s += strlen(++s); /* this one is ok too */
else
break;
}
/* can grab env area too? */
if (origenviron && (origenviron[0] == s + 1
#ifdef OS2
|| (origenviron[0] == s + 9 && (s += 8))
#endif
)) {
my_setenv("NoNe SuCh", Nullch);
/* force copy of environment */
for (i = 0; origenviron[i]; i++)
if (origenviron[i] == s + 1)
s += strlen(++s);
else
break;
}
origalen = s - origargv[0];
}
s = SvPV_force(sv,len);
i = len;
if (i >= origalen) {
i = origalen;
/* don't allow system to limit $0 seen by script */
/* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
Copy(s, origargv[0], i, char);
s = origargv[0]+i;
*s = '\0';
}
else {
Copy(s, origargv[0], i, char);
s = origargv[0]+i;
*s++ = '\0';
while (++i < origalen)
*s++ = ' ';
s = origargv[0]+i;
for (i = 1; i < origargc; i++)
origargv[i] = Nullch;
}
break;
}
return 0;
}
I32
whichsig(sig)
char *sig;
{
register char **sigv;
for (sigv = sig_name+1; *sigv; sigv++)
if (strEQ(sig,*sigv))
return sig_num[sigv - sig_name];
#ifdef SIGCLD
if (strEQ(sig,"CHLD"))
return SIGCLD;
#endif
#ifdef SIGCHLD
if (strEQ(sig,"CLD"))
return SIGCHLD;
#endif
return 0;
}
static SV* sig_sv;
static void
unwind_handler_stack(p)
void *p;
{
U32 flags = *(U32*)p;
if (flags & 1)
savestack_ix -= 5; /* Unprotect save in progress. */
/* cxstack_ix-- Not needed, die already unwound it. */
if (flags & 64)
SvREFCNT_dec(sig_sv);
}
Signal_t
sighandler(sig)
int sig;
{
dSP;
GV *gv;
HV *st;
SV *sv, *tSv = Sv;
CV *cv;
AV *oldstack;
OP *myop = op;
U32 flags = 0;
I32 o_save_i = savestack_ix, type;
CONTEXT *cx;
XPV *tXpv = Xpv;
if (savestack_ix + 15 <= savestack_max)
flags |= 1;
if (cxstack_ix < cxstack_max - 2)
flags |= 2;
if (markstack_ptr < markstack_max - 2)
flags |= 4;
if (retstack_ix < retstack_max - 2)
flags |= 8;
if (scopestack_ix < scopestack_max - 3)
flags |= 16;
if (flags & 2) { /* POPBLOCK may decrease cxstack too early. */
cxstack_ix++; /* Protect from overwrite. */
cx = &cxstack[cxstack_ix];
type = cx->cx_type; /* Can be during partial write. */
cx->cx_type = CXt_NULL; /* Make it safe for unwind. */
}
if (!psig_ptr[sig])
die("Signal SIG%s received, but no signal handler set.\n",
sig_name[sig]);
/* Max number of items pushed there is 3*n or 4. We cannot fix
infinity, so we fix 4 (in fact 5): */
if (flags & 1) {
savestack_ix += 5; /* Protect save in progress. */
o_save_i = savestack_ix;
SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
}
if (flags & 4)
markstack_ptr++; /* Protect mark. */
if (flags & 8) {
retstack_ix++;
retstack[retstack_ix] = NULL;
}
if (flags & 16)
scopestack_ix += 1;
/* sv_2cv is too complicated, try a simpler variant first: */
if (!SvROK(psig_ptr[sig]) || !(cv = (CV*)SvRV(psig_ptr[sig]))
|| SvTYPE(cv) != SVt_PVCV)
cv = sv_2cv(psig_ptr[sig],&st,&gv,TRUE);
if (!cv || !CvROOT(cv)) {
if (dowarn)
warn("SIG%s handler \"%s\" not defined.\n",
sig_name[sig], GvENAME(gv) );
return;
}
oldstack = curstack;
if (curstack != signalstack)
AvFILL(signalstack) = 0;
SWITCHSTACK(curstack, signalstack);
if(psig_name[sig]) {
sv = SvREFCNT_inc(psig_name[sig]);
flags |= 64;
sig_sv = sv;
} else {
sv = sv_newmortal();
sv_setpv(sv,sig_name[sig]);
}
PUSHMARK(sp);
PUSHs(sv);
PUTBACK;
perl_call_sv((SV*)cv, G_DISCARD);
SWITCHSTACK(signalstack, oldstack);
if (flags & 1)
savestack_ix -= 8; /* Unprotect save in progress. */
if (flags & 2) {
cxstack[cxstack_ix].cx_type = type;
cxstack_ix -= 1;
}
if (flags & 4)
markstack_ptr--;
if (flags & 8)
retstack_ix--;
if (flags & 16)
scopestack_ix -= 1;
if (flags & 64)
SvREFCNT_dec(sv);
op = myop; /* Apparently not needed... */
Sv = tSv; /* Restore global temporaries. */
Xpv = tXpv;
return;
}
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