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freebsd-dev/contrib/perl5/mg.c

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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.
*/
#ifdef PERL_OBJECT
#define VTBL this->*vtbl
#else
struct magic_state {
SV* mgs_sv;
U32 mgs_flags;
};
typedef struct magic_state MGS;
static void restore_magic _((void *p));
#define VTBL *vtbl
#endif
STATIC void
save_magic(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(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)
{
MAGIC* mg;
for (mg = SvMAGIC(sv); mg; mg = mg->mg_moremagic) {
MGVTBL* vtbl = mg->mg_virtual;
if (vtbl) {
if ((vtbl->svt_get != NULL) && !(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 != NULL))
SvRMAGICAL_on(sv);
}
}
}
int
mg_get(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 != NULL)) {
(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)
{
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 != NULL))
(VTBL->svt_set)(sv, mg);
}
LEAVE;
return 0;
}
U32
mg_length(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 != NULL)) {
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;
}
I32
mg_size(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 != NULL)) {
MGS mgs;
ENTER;
/* omit MGf_GSKIP -- not changed here */
len = (VTBL->svt_len)(sv, mg);
LEAVE;
return len;
}
}
switch(SvTYPE(sv)) {
case SVt_PVAV:
len = AvFILLp((AV *) sv); /* Fallback to non-tied array */
return len;
case SVt_PVHV:
/* FIXME */
default:
croak("Size magic not implemented");
break;
}
return 0;
}
int
mg_clear(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 != NULL))
(VTBL->svt_clear)(sv, mg);
}
LEAVE;
return 0;
}
MAGIC*
mg_find(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 *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)
{
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 != NULL))
(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 *sv, MAGIC *mg)
{
dTHR;
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 (PL_curpm && (rx = PL_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 (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 ((s = rx->subbeg) && rx->startp[0]) {
i = rx->startp[0] - s;
if (i >= 0)
return i;
}
}
return 0;
case '\'':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (rx->subend && (s = rx->endp[0])) {
i = rx->subend - s;
if (i >= 0)
return i;
}
}
return 0;
case ',':
return (STRLEN)PL_ofslen;
case '\\':
return (STRLEN)PL_orslen;
}
magic_get(sv,mg);
if (!SvPOK(sv) && SvNIOK(sv))
sv_2pv(sv, &PL_na);
if (SvPOK(sv))
return SvCUR(sv);
return 0;
}
int
magic_get(SV *sv, MAGIC *mg)
{
dTHR;
register I32 paren;
register char *s;
register I32 i;
register REGEXP *rx;
char *t;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(sv, PL_bodytarget);
break;
case '\004': /* ^D */
sv_setiv(sv, (IV)(PL_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
#ifdef WIN32
{
DWORD dwErr = GetLastError();
sv_setnv(sv, (double)dwErr);
if (dwErr)
{
#ifdef PERL_OBJECT
char *sMsg;
DWORD dwLen;
PerlProc_GetSysMsg(sMsg, dwLen, dwErr);
sv_setpvn(sv, sMsg, dwLen);
PerlProc_FreeBuf(sMsg);
#else
win32_str_os_error(sv, dwErr);
#endif
}
else
sv_setpv(sv, "");
SetLastError(dwErr);
}
#else
sv_setnv(sv, (double)errno);
sv_setpv(sv, errno ? Strerror(errno) : "");
#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)
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 */
sv_setiv(sv, (IV)PL_dowarn);
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)) {
/*
* 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 &&
(s = rx->startp[paren]) &&
(t = rx->endp[paren]))
{
i = t - s;
getrx:
if (i >= 0) {
bool was_tainted;
if (PL_tainting) {
was_tainted = PL_tainted;
PL_tainted = FALSE;
}
sv_setpvn(sv,s,i);
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]) {
i = rx->startp[0] - s;
goto getrx;
}
}
sv_setsv(sv,&PL_sv_undef);
break;
case '\'':
if (PL_curpm && (rx = PL_curpm->op_pmregexp)) {
if (rx->subend && (s = rx->endp[0])) {
i = rx->subend - s;
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, (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)PL_uid);
break;
case '>':
sv_setiv(sv, (IV)PL_euid);
break;
case '(':
sv_setiv(sv, (IV)PL_gid);
sv_setpvf(sv, "%Vd", (IV)PL_gid);
goto add_groups;
case ')':
sv_setiv(sv, (IV)PL_egid);
sv_setpvf(sv, "%Vd", (IV)PL_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;
#ifdef USE_THREADS
case '@':
sv_setsv(sv, thr->errsv);
break;
#endif /* USE_THREADS */
}
return 0;
}
int
magic_getuvar(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 *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
magic_clearenv(SV *sv, MAGIC *mg)
{
my_setenv(MgPV(mg,PL_na),Nullch);
return 0;
}
int
magic_set_all_env(SV *sv, MAGIC *mg)
{
#if defined(VMS)
die("Can't make list assignment to %%ENV on this system");
#else
dTHR;
if (PL_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), PL_na));
}
}
#endif
return 0;
}
int
magic_clear_all_env(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 == PL_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 *sv, MAGIC *mg)
{
I32 i;
/* Are we fetching a signal entry? */
i = whichsig(MgPV(mg,PL_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,&PL_sv_undef);
psig_ptr[i] = SvREFCNT_inc(sv);
SvTEMP_off(sv);
}
}
return 0;
}
int
magic_clearsig(SV *sv, MAGIC *mg)
{
I32 i;
/* Are we clearing a signal entry? */
i = whichsig(MgPV(mg,PL_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 *sv, MAGIC *mg)
{
dTHR;
register char *s;
I32 i;
SV** svp;
s = MgPV(mg,PL_na);
if (*s == '_') {
if (strEQ(s,"__DIE__"))
svp = &PL_diehook;
else if (strEQ(s,"__WARN__"))
svp = &PL_warnhook;
else if (strEQ(s,"__PARSE__"))
svp = &PL_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 (PL_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, PL_sighandlerp);
else
*svp = SvREFCNT_inc(sv);
return 0;
}
s = SvPV_force(sv,PL_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, PL_sighandlerp);
else
*svp = SvREFCNT_inc(sv);
}
return 0;
}
int
magic_setisa(SV *sv, MAGIC *mg)
{
PL_sub_generation++;
return 0;
}
#ifdef OVERLOAD
int
magic_setamagic(SV *sv, MAGIC *mg)
{
/* HV_badAMAGIC_on(Sv_STASH(sv)); */
PL_amagic_generation++;
return 0;
}
#endif /* OVERLOAD */
int
magic_getnkeys(SV *sv, MAGIC *mg)
{
HV *hv = (HV*)LvTARG(sv);
HE *entry;
I32 i = 0;
if (hv) {
(void) hv_iterinit(hv);
if (!SvRMAGICAL(hv) || !mg_find((SV*)hv,'P'))
i = HvKEYS(hv);
else {
/*SUPPRESS 560*/
while (entry = hv_iternext(hv)) {
i++;
}
}
}
sv_setiv(sv, (IV)i);
return 0;
}
int
magic_setnkeys(SV *sv, MAGIC *mg)
{
if (LvTARG(sv)) {
hv_ksplit((HV*)LvTARG(sv), SvIV(sv));
}
return 0;
}
/* caller is responsible for stack switching/cleanup */
STATIC int
magic_methcall(MAGIC *mg, char *meth, I32 flags, int n, SV *val)
{
dSP;
PUSHMARK(SP);
EXTEND(SP, n);
PUSHs(mg->mg_obj);
if (n > 1) {
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)));
}
}
if (n > 2) {
PUSHs(val);
}
PUTBACK;
return perl_call_method(meth, flags);
}
STATIC int
magic_methpack(SV *sv, MAGIC *mg, char *meth)
{
dSP;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
if (magic_methcall(mg, meth, G_SCALAR, 2, NULL)) {
sv_setsv(sv, *PL_stack_sp--);
}
POPSTACK;
FREETMPS;
LEAVE;
return 0;
}
int
magic_getpack(SV *sv, MAGIC *mg)
{
magic_methpack(sv,mg,"FETCH");
if (mg->mg_ptr)
mg->mg_flags |= MGf_GSKIP;
return 0;
}
int
magic_setpack(SV *sv, MAGIC *mg)
{
dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
magic_methcall(mg, "STORE", G_SCALAR|G_DISCARD, 3, sv);
POPSTACK;
LEAVE;
return 0;
}
int
magic_clearpack(SV *sv, MAGIC *mg)
{
return magic_methpack(sv,mg,"DELETE");
}
U32
magic_sizepack(SV *sv, MAGIC *mg)
{
dSP;
U32 retval = 0;
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
if (magic_methcall(mg, "FETCHSIZE", G_SCALAR, 2, NULL)) {
sv = *PL_stack_sp--;
retval = (U32) SvIV(sv)-1;
}
POPSTACK;
FREETMPS;
LEAVE;
return retval;
}
int magic_wipepack(SV *sv, MAGIC *mg)
{
dSP;
ENTER;
PUSHSTACKi(PERLSI_MAGIC);
PUSHMARK(SP);
XPUSHs(mg->mg_obj);
PUTBACK;
perl_call_method("CLEAR", G_SCALAR|G_DISCARD);
POPSTACK;
LEAVE;
return 0;
}
int
magic_nextpack(SV *sv, MAGIC *mg, SV *key)
{
dSP;
char *meth = SvOK(key) ? "NEXTKEY" : "FIRSTKEY";
ENTER;
SAVETMPS;
PUSHSTACKi(PERLSI_MAGIC);
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, *PL_stack_sp--);
POPSTACK;
FREETMPS;
LEAVE;
return 0;
}
int
magic_existspack(SV *sv, MAGIC *mg)
{
return magic_methpack(sv,mg,"EXISTS");
}
int
magic_setdbline(SV *sv, MAGIC *mg)
{
dTHR;
OP *o;
I32 i;
GV* gv;
SV** svp;
gv = PL_DBline;
i = SvTRUE(sv);
svp = av_fetch(GvAV(gv),
atoi(MgPV(mg,PL_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 *sv, MAGIC *mg)
{
dTHR;
sv_setiv(sv, AvFILL((AV*)mg->mg_obj) + PL_curcop->cop_arybase);
return 0;
}
int
magic_setarylen(SV *sv, MAGIC *mg)
{
dTHR;
av_fill((AV*)mg->mg_obj, SvIV(sv) - PL_curcop->cop_arybase);
return 0;
}
int
magic_getpos(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) {
dTHR;
sv_setiv(sv, mg->mg_len + PL_curcop->cop_arybase);
return 0;
}
}
(void)SvOK_off(sv);
return 0;
}
int
magic_setpos(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);
WITH_THR(pos = SvIV(sv) - PL_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 *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 *sv, MAGIC *mg)
{
register char *s;
GV* gv;
if (!SvOK(sv))
return 0;
s = SvPV(sv, PL_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_getsubstr(SV *sv, MAGIC *mg)
{
STRLEN len;
SV *lsv = LvTARG(sv);
char *tmps = SvPV(lsv,len);
I32 offs = LvTARGOFF(sv);
I32 rem = LvTARGLEN(sv);
if (offs > len)
offs = len;
if (rem + offs > len)
rem = len - offs;
sv_setpvn(sv, tmps + offs, (STRLEN)rem);
return 0;
}
int
magic_setsubstr(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 *sv, MAGIC *mg)
{
dTHR;
TAINT_IF((mg->mg_len & 1) ||
(mg->mg_len & 2) && mg->mg_obj == sv); /* kludge */
return 0;
}
int
magic_settaint(SV *sv, MAGIC *mg)
{
dTHR;
if (PL_localizing) {
if (PL_localizing == 1)
mg->mg_len <<= 1;
else
mg->mg_len >>= 1;
}
else if (PL_tainted)
mg->mg_len |= 1;
else
mg->mg_len &= ~1;
return 0;
}
int
magic_getvec(SV *sv, MAGIC *mg)
{
SV *lsv = LvTARG(sv);
unsigned char *s;
unsigned long retnum;
STRLEN lsvlen;
I32 len;
I32 offset;
I32 size;
if (!lsv) {
SvOK_off(sv);
return 0;
}
s = (unsigned char *) SvPV(lsv, lsvlen);
offset = LvTARGOFF(sv);
size = LvTARGLEN(sv);
len = (offset + size + 7) / 8;
/* Copied from pp_vec() */
if (len > lsvlen) {
if (size <= 8)
retnum = 0;
else {
offset >>= 3;
if (size == 16) {
if (offset >= lsvlen)
retnum = 0;
else
retnum = (unsigned long) s[offset] << 8;
}
else if (size == 32) {
if (offset >= lsvlen)
retnum = 0;
else if (offset + 1 >= lsvlen)
retnum = (unsigned long) s[offset] << 24;
else if (offset + 2 >= lsvlen)
retnum = ((unsigned long) s[offset] << 24) +
((unsigned long) s[offset + 1] << 16);
else
retnum = ((unsigned long) s[offset] << 24) +
((unsigned long) s[offset + 1] << 16) +
(s[offset + 2] << 8);
}
}
}
else if (size < 8)
retnum = (s[offset >> 3] >> (offset & 7)) & ((1 << size) - 1);
else {
offset >>= 3;
if (size == 8)
retnum = s[offset];
else if (size == 16)
retnum = ((unsigned long) s[offset] << 8) + s[offset+1];
else if (size == 32)
retnum = ((unsigned long) s[offset] << 24) +
((unsigned long) s[offset + 1] << 16) +
(s[offset + 2] << 8) + s[offset+3];
}
sv_setuv(sv, (UV)retnum);
return 0;
}
int
magic_setvec(SV *sv, MAGIC *mg)
{
do_vecset(sv); /* XXX slurp this routine */
return 0;
}
int
magic_getdefelem(SV *sv, MAGIC *mg)
{
SV *targ = Nullsv;
if (LvTARGLEN(sv)) {
if (mg->mg_obj) {
SV *ahv = LvTARG(sv);
if (SvTYPE(ahv) == SVt_PVHV) {
HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, FALSE, 0);
if (he)
targ = HeVAL(he);
}
else {
SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, FALSE, 0);
if (svp)
targ = *svp;
}
}
else {
AV* av = (AV*)LvTARG(sv);
if ((I32)LvTARGOFF(sv) <= AvFILL(av))
targ = AvARRAY(av)[LvTARGOFF(sv)];
}
if (targ && targ != &PL_sv_undef) {
dTHR; /* just for SvREFCNT_dec */
/* 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 : &PL_sv_undef);
return 0;
}
int
magic_setdefelem(SV *sv, MAGIC *mg)
{
if (LvTARGLEN(sv))
vivify_defelem(sv);
if (LvTARG(sv)) {
sv_setsv(LvTARG(sv), sv);
SvSETMAGIC(LvTARG(sv));
}
return 0;
}
void
vivify_defelem(SV *sv)
{
dTHR; /* just for SvREFCNT_inc and SvREFCNT_dec*/
MAGIC *mg;
SV *value = Nullsv;
if (!LvTARGLEN(sv) || !(mg = mg_find(sv, 'y')))
return;
if (mg->mg_obj) {
SV *ahv = LvTARG(sv);
if (SvTYPE(ahv) == SVt_PVHV) {
HE *he = hv_fetch_ent((HV*)ahv, mg->mg_obj, TRUE, 0);
if (he)
value = HeVAL(he);
}
else {
SV **svp = avhv_fetch_ent((AV*)ahv, mg->mg_obj, TRUE, 0);
if (svp)
value = *svp;
}
if (!value || value == &PL_sv_undef)
croak(no_helem, SvPV(mg->mg_obj, PL_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) == &PL_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 *sv, MAGIC *mg)
{
mg->mg_len = -1;
SvSCREAM_off(sv);
return 0;
}
int
magic_setbm(SV *sv, MAGIC *mg)
{
sv_unmagic(sv, 'B');
SvVALID_off(sv);
return 0;
}
int
magic_setfm(SV *sv, MAGIC *mg)
{
sv_unmagic(sv, 'f');
SvCOMPILED_off(sv);
return 0;
}
int
magic_setuvar(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;
}
int
magic_freeregexp(SV *sv, MAGIC *mg)
{
regexp *re = (regexp *)mg->mg_obj;
ReREFCNT_dec(re);
return 0;
}
#ifdef USE_LOCALE_COLLATE
int
magic_setcollxfrm(SV *sv, MAGIC *mg)
{
/*
* Ren<65> 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 *sv, MAGIC *mg)
{
dTHR;
register char *s;
I32 i;
STRLEN len;
switch (*mg->mg_ptr) {
case '\001': /* ^A */
sv_setsv(PL_bodytarget, sv);
break;
case '\004': /* ^D */
PL_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
#ifdef WIN32
SetLastError( SvIV(sv) );
#else
/* will anyone ever use this? */
SETERRNO(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv), 4);
#endif
#endif
break;
case '\006': /* ^F */
PL_maxsysfd = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\010': /* ^H */
PL_hints = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\011': /* ^I */ /* NOT \t in EBCDIC */
if (PL_inplace)
Safefree(PL_inplace);
if (SvOK(sv))
PL_inplace = savepv(SvPV(sv,PL_na));
else
PL_inplace = Nullch;
break;
case '\017': /* ^O */
if (PL_osname)
Safefree(PL_osname);
if (SvOK(sv))
PL_osname = savepv(SvPV(sv,PL_na));
else
PL_osname = Nullch;
break;
case '\020': /* ^P */
PL_perldb = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '\024': /* ^T */
#ifdef BIG_TIME
PL_basetime = (Time_t)(SvNOK(sv) ? SvNVX(sv) : sv_2nv(sv));
#else
PL_basetime = (Time_t)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
#endif
break;
case '\027': /* ^W */
PL_dowarn = (bool)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '.':
if (PL_localizing) {
if (PL_localizing == 1)
save_sptr((SV**)&PL_last_in_gv);
}
else if (SvOK(sv) && GvIO(PL_last_in_gv))
IoLINES(GvIOp(PL_last_in_gv)) = (long)SvIV(sv);
break;
case '^':
Safefree(IoTOP_NAME(GvIOp(PL_defoutgv)));
IoTOP_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
IoTOP_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '~':
Safefree(IoFMT_NAME(GvIOp(PL_defoutgv)));
IoFMT_NAME(GvIOp(PL_defoutgv)) = s = savepv(SvPV(sv,PL_na));
IoFMT_GV(GvIOp(PL_defoutgv)) = gv_fetchpv(s,TRUE, SVt_PVIO);
break;
case '=':
IoPAGE_LEN(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '-':
IoLINES_LEFT(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
if (IoLINES_LEFT(GvIOp(PL_defoutgv)) < 0L)
IoLINES_LEFT(GvIOp(PL_defoutgv)) = 0L;
break;
case '%':
IoPAGE(GvIOp(PL_defoutgv)) = (long)(SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv));
break;
case '|':
{
IO *io = GvIOp(PL_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);
PL_multiline = (i != 0);
break;
case '/':
SvREFCNT_dec(PL_nrs);
PL_nrs = newSVsv(sv);
SvREFCNT_dec(PL_rs);
PL_rs = SvREFCNT_inc(PL_nrs);
break;
case '\\':
if (PL_ors)
Safefree(PL_ors);
if (SvOK(sv) || SvGMAGICAL(sv))
PL_ors = savepv(SvPV(sv,PL_orslen));
else {
PL_ors = Nullch;
PL_orslen = 0;
}
break;
case ',':
if (PL_ofs)
Safefree(PL_ofs);
PL_ofs = savepv(SvPV(sv, PL_ofslen));
break;
case '#':
if (PL_ofmt)
Safefree(PL_ofmt);
PL_ofmt = savepv(SvPV(sv,PL_na));
break;
case '[':
PL_compiling.cop_arybase = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
break;
case '?':
#ifdef COMPLEX_STATUS
if (PL_localizing == 2) {
PL_statusvalue = LvTARGOFF(sv);
PL_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) : SvOK(sv) ? sv_2iv(sv) : 0,
(SvIV(sv) == EVMSERR) ? 4 : vaxc$errno);
break;
case '<':
PL_uid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_RUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRUID
(void)setruid((Uid_t)PL_uid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)PL_uid, (Uid_t)-1);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)PL_uid, (Uid_t)-1, (Uid_t)-1);
#else
if (PL_uid == PL_euid) /* special case $< = $> */
(void)PerlProc_setuid(PL_uid);
else {
PL_uid = (I32)PerlProc_getuid();
croak("setruid() not implemented");
}
#endif
#endif
#endif
PL_uid = (I32)PerlProc_getuid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case '>':
PL_euid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_EUID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEUID
(void)seteuid((Uid_t)PL_euid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1, (Uid_t)PL_euid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1, (Uid_t)PL_euid, (Uid_t)-1);
#else
if (PL_euid == PL_uid) /* special case $> = $< */
PerlProc_setuid(PL_euid);
else {
PL_euid = (I32)PerlProc_geteuid();
croak("seteuid() not implemented");
}
#endif
#endif
#endif
PL_euid = (I32)PerlProc_geteuid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case '(':
PL_gid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
if (PL_delaymagic) {
PL_delaymagic |= DM_RGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETRGID
(void)setrgid((Gid_t)PL_gid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)PL_gid, (Gid_t)-1);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)PL_gid, (Gid_t)-1, (Gid_t) 1);
#else
if (PL_gid == PL_egid) /* special case $( = $) */
(void)PerlProc_setgid(PL_gid);
else {
PL_gid = (I32)PerlProc_getgid();
croak("setrgid() not implemented");
}
#endif
#endif
#endif
PL_gid = (I32)PerlProc_getgid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case ')':
#ifdef HAS_SETGROUPS
{
char *p = SvPV(sv, PL_na);
Groups_t gary[NGROUPS];
SET_NUMERIC_STANDARD();
while (isSPACE(*p))
++p;
PL_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 */
PL_egid = SvIOK(sv) ? SvIVX(sv) : sv_2iv(sv);
#endif /* HAS_SETGROUPS */
if (PL_delaymagic) {
PL_delaymagic |= DM_EGID;
break; /* don't do magic till later */
}
#ifdef HAS_SETEGID
(void)setegid((Gid_t)PL_egid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)-1, (Gid_t)PL_egid);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)-1, (Gid_t)PL_egid, (Gid_t)-1);
#else
if (PL_egid == PL_gid) /* special case $) = $( */
(void)PerlProc_setgid(PL_egid);
else {
PL_egid = (I32)PerlProc_getegid();
croak("setegid() not implemented");
}
#endif
#endif
#endif
PL_egid = (I32)PerlProc_getegid();
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
break;
case ':':
PL_chopset = SvPV_force(sv,PL_na);
break;
case '0':
if (!PL_origalen) {
s = PL_origargv[0];
s += strlen(s);
/* See if all the arguments are contiguous in memory */
for (i = 1; i < PL_origargc; i++) {
if (PL_origargv[i] == s + 1
#ifdef OS2
|| PL_origargv[i] == s + 2
#endif
)
s += strlen(++s); /* this one is ok too */
else
break;
}
/* can grab env area too? */
if (PL_origenviron && (PL_origenviron[0] == s + 1
#ifdef OS2
|| (PL_origenviron[0] == s + 9 && (s += 8))
#endif
)) {
my_setenv("NoNe SuCh", Nullch);
/* force copy of environment */
for (i = 0; PL_origenviron[i]; i++)
if (PL_origenviron[i] == s + 1)
s += strlen(++s);
else
break;
}
PL_origalen = s - PL_origargv[0];
}
s = SvPV_force(sv,len);
i = len;
if (i >= PL_origalen) {
i = PL_origalen;
/* don't allow system to limit $0 seen by script */
/* SvCUR_set(sv, i); *SvEND(sv) = '\0'; */
Copy(s, PL_origargv[0], i, char);
s = PL_origargv[0]+i;
*s = '\0';
}
else {
Copy(s, PL_origargv[0], i, char);
s = PL_origargv[0]+i;
*s++ = '\0';
while (++i < PL_origalen)
*s++ = ' ';
s = PL_origargv[0]+i;
for (i = 1; i < PL_origargc; i++)
PL_origargv[i] = Nullch;
}
break;
#ifdef USE_THREADS
case '@':
sv_setsv(thr->errsv, sv);
break;
#endif /* USE_THREADS */
}
return 0;
}
#ifdef USE_THREADS
int
magic_mutexfree(SV *sv, MAGIC *mg)
{
dTHR;
DEBUG_S(PerlIO_printf(PerlIO_stderr(), "0x%lx: magic_mutexfree 0x%lx\n",
(unsigned long)thr, (unsigned long)sv);)
if (MgOWNER(mg))
croak("panic: magic_mutexfree");
MUTEX_DESTROY(MgMUTEXP(mg));
COND_DESTROY(MgCONDP(mg));
SvREFCNT_dec(sv);
return 0;
}
#endif /* USE_THREADS */
I32
whichsig(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(void *p)
{
dTHR;
U32 flags = *(U32*)p;
if (flags & 1)
PL_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(int sig)
{
dSP;
GV *gv = Nullgv;
HV *st;
SV *sv, *tSv = PL_Sv;
CV *cv = Nullcv;
OP *myop = PL_op;
U32 flags = 0;
I32 o_save_i = PL_savestack_ix, type;
XPV *tXpv = PL_Xpv;
if (PL_savestack_ix + 15 <= PL_savestack_max)
flags |= 1;
if (PL_markstack_ptr < PL_markstack_max - 2)
flags |= 4;
if (PL_retstack_ix < PL_retstack_max - 2)
flags |= 8;
if (PL_scopestack_ix < PL_scopestack_max - 3)
flags |= 16;
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) {
PL_savestack_ix += 5; /* Protect save in progress. */
o_save_i = PL_savestack_ix;
SAVEDESTRUCTOR(unwind_handler_stack, (void*)&flags);
}
if (flags & 4)
PL_markstack_ptr++; /* Protect mark. */
if (flags & 8) {
PL_retstack_ix++;
PL_retstack[PL_retstack_ix] = NULL;
}
if (flags & 16)
PL_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 (PL_dowarn)
warn("SIG%s handler \"%s\" not defined.\n",
sig_name[sig], (gv ? GvENAME(gv)
: ((cv && CvGV(cv))
? GvENAME(CvGV(cv))
: "__ANON__")));
goto cleanup;
}
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]);
}
PUSHSTACKi(PERLSI_SIGNAL);
PUSHMARK(SP);
PUSHs(sv);
PUTBACK;
perl_call_sv((SV*)cv, G_DISCARD);
POPSTACK;
cleanup:
if (flags & 1)
PL_savestack_ix -= 8; /* Unprotect save in progress. */
if (flags & 4)
PL_markstack_ptr--;
if (flags & 8)
PL_retstack_ix--;
if (flags & 16)
PL_scopestack_ix -= 1;
if (flags & 64)
SvREFCNT_dec(sv);
PL_op = myop; /* Apparently not needed... */
PL_Sv = tSv; /* Restore global temporaries. */
PL_Xpv = tXpv;
return;
}
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