/* perl.c
*
* Copyright (c) 1987-1996 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.
*
*/
/*
* "A ship then new they built for him/of mithril and of elven glass" --Bilbo
*/
#include "EXTERN.h"
#include "perl.h"
#include "patchlevel.h"
/* XXX If this causes problems, set i_unistd=undef in the hint file. */
#ifdef I_UNISTD
#include <unistd.h>
#endif
dEXT char rcsid[] = "perl.c\nPatch level: ###\n";
#ifdef IAMSUID
#ifndef DOSUID
#define DOSUID
#endif
#endif
#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
#ifdef DOSUID
#undef DOSUID
#endif
#endif
static void find_beginning _((void));
static void incpush _((char *));
static void init_ids _((void));
static void init_debugger _((void));
static void init_lexer _((void));
static void init_main_stash _((void));
static void init_perllib _((void));
static void init_postdump_symbols _((int, char **, char **));
static void init_predump_symbols _((void));
static void init_stacks _((void));
static void nuke_stacks _((void));
static void open_script _((char *, bool, SV *));
static void usage _((char *));
static void validate_suid _((char *, char*));
static int fdscript = -1;
PerlInterpreter *
perl_alloc()
{
PerlInterpreter *sv_interp;
curinterp = 0;
New(53, sv_interp, 1, PerlInterpreter);
return sv_interp;
}
void
perl_construct( sv_interp )
register PerlInterpreter *sv_interp;
{
if (!(curinterp = sv_interp))
return;
#ifdef MULTIPLICITY
Zero(sv_interp, 1, PerlInterpreter);
#endif
/* Init the real globals? */
if (!linestr) {
linestr = NEWSV(65,80);
sv_upgrade(linestr,SVt_PVIV);
if (!SvREADONLY(&sv_undef)) {
SvREADONLY_on(&sv_undef);
sv_setpv(&sv_no,No);
SvNV(&sv_no);
SvREADONLY_on(&sv_no);
sv_setpv(&sv_yes,Yes);
SvNV(&sv_yes);
SvREADONLY_on(&sv_yes);
}
nrs = newSVpv("\n", 1);
rs = SvREFCNT_inc(nrs);
#ifdef MSDOS
/*
* There is no way we can refer to them from Perl so close them to save
* space. The other alternative would be to provide STDAUX and STDPRN
* filehandles.
*/
(void)fclose(stdaux);
(void)fclose(stdprn);
#endif
}
#ifdef MULTIPLICITY
chopset = " \n-";
copline = NOLINE;
curcop = &compiling;
dbargs = 0;
dlmax = 128;
laststatval = -1;
laststype = OP_STAT;
maxscream = -1;
maxsysfd = MAXSYSFD;
rsfp = Nullfp;
statname = Nullsv;
tmps_floor = -1;
#endif
init_ids();
#if defined(SUBVERSION) && SUBVERSION > 0
sprintf(patchlevel, "%7.5f", (double) 5
+ ((double) PATCHLEVEL / (double) 1000)
+ ((double) SUBVERSION / (double) 100000));
#else
sprintf(patchlevel, "%5.3f", (double) 5 +
((double) PATCHLEVEL / (double) 1000));
#endif
#if defined(LOCAL_PATCH_COUNT)
localpatches = local_patches; /* For possible -v */
#endif
PerlIO_init(); /* Hook to IO system */
fdpid = newAV(); /* for remembering popen pids by fd */
pidstatus = newHV();/* for remembering status of dead pids */
init_stacks();
ENTER;
}
void
perl_destruct(sv_interp)
register PerlInterpreter *sv_interp;
{
int destruct_level; /* 0=none, 1=full, 2=full with checks */
I32 last_sv_count;
HV *hv;
if (!(curinterp = sv_interp))
return;
destruct_level = perl_destruct_level;
#ifdef DEBUGGING
{
char *s;
if (s = getenv("PERL_DESTRUCT_LEVEL"))
destruct_level = atoi(s);
}
#endif
LEAVE;
FREETMPS;
/* We must account for everything. First the syntax tree. */
if (main_root) {
curpad = AvARRAY(comppad);
op_free(main_root);
main_root = 0;
}
if (sv_objcount) {
/*
* Try to destruct global references. We do this first so that the
* destructors and destructees still exist. Some sv's might remain.
* Non-referenced objects are on their own.
*/
dirty = TRUE;
sv_clean_objs();
}
if (destruct_level == 0){
DEBUG_P(debprofdump());
/* The exit() function will do everything that needs doing. */
return;
}
/* unhook hooks which may now point to, or use, broken code */
if (warnhook && SvREFCNT(warnhook))
SvREFCNT_dec(warnhook);
if (diehook && SvREFCNT(diehook))
SvREFCNT_dec(diehook);
if (parsehook && SvREFCNT(parsehook))
SvREFCNT_dec(parsehook);
/* Prepare to destruct main symbol table. */
hv = defstash;
defstash = 0;
SvREFCNT_dec(hv);
FREETMPS;
if (destruct_level >= 2) {
if (scopestack_ix != 0)
warn("Unbalanced scopes: %d more ENTERs than LEAVEs\n", scopestack_ix);
if (savestack_ix != 0)
warn("Unbalanced saves: %d more saves than restores\n", savestack_ix);
if (tmps_floor != -1)
warn("Unbalanced tmps: %d more allocs than frees\n", tmps_floor + 1);
if (cxstack_ix != -1)
warn("Unbalanced context: %d more PUSHes than POPs\n", cxstack_ix + 1);
}
/* Now absolutely destruct everything, somehow or other, loops or no. */
last_sv_count = 0;
SvFLAGS(strtab) |= SVTYPEMASK; /* don't clean out strtab now */
while (sv_count != 0 && sv_count != last_sv_count) {
last_sv_count = sv_count;
sv_clean_all();
}
SvFLAGS(strtab) &= ~SVTYPEMASK;
SvFLAGS(strtab) |= SVt_PVHV;
/* Destruct the global string table. */
{
/* Yell and reset the HeVAL() slots that are still holding refcounts,
* so that sv_free() won't fail on them.
*/
I32 riter;
I32 max;
HE *hent;
HE **array;
riter = 0;
max = HvMAX(strtab);
array = HvARRAY(strtab);
hent = array[0];
for (;;) {
if (hent) {
warn("Unbalanced string table refcount: (%d) for \"%s\"",
HeVAL(hent) - Nullsv, HeKEY(hent));
HeVAL(hent) = Nullsv;
hent = HeNEXT(hent);
}
if (!hent) {
if (++riter > max)
break;
hent = array[riter];
}
}
}
SvREFCNT_dec(strtab);
if (sv_count != 0)
warn("Scalars leaked: %d\n", sv_count);
sv_free_arenas();
linestr = NULL; /* No SVs have survived, need to clean out */
if (origfilename)
Safefree(origfilename);
nuke_stacks();
hints = 0; /* Reset hints. Should hints be per-interpreter ? */
DEBUG_P(debprofdump());
}
void
perl_free(sv_interp)
PerlInterpreter *sv_interp;
{
if (!(curinterp = sv_interp))
return;
Safefree(sv_interp);
}
#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE)
char *getenv _((char *)); /* Usually in <stdlib.h> */
#endif
int
perl_parse(sv_interp, xsinit, argc, argv, env)
PerlInterpreter *sv_interp;
void (*xsinit)_((void));
int argc;
char **argv;
char **env;
{
register SV *sv;
register char *s;
char *scriptname = NULL;
VOL bool dosearch = FALSE;
char *validarg = "";
AV* comppadlist;
#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
#ifdef IAMSUID
#undef IAMSUID
croak("suidperl is no longer needed since the kernel can now execute\n\
setuid perl scripts securely.\n");
#endif
#endif
if (!(curinterp = sv_interp))
return 255;
#if defined(NeXT) && defined(__DYNAMIC__)
_dyld_lookup_and_bind
("__environ", (unsigned long *) &environ_pointer, NULL);
#endif /* environ */
origargv = argv;
origargc = argc;
#ifndef VMS /* VMS doesn't have environ array */
origenviron = environ;
#endif
e_tmpname = Nullch;
if (do_undump) {
/* Come here if running an undumped a.out. */
origfilename = savepv(argv[0]);
do_undump = FALSE;
cxstack_ix = -1; /* start label stack again */
init_ids();
init_postdump_symbols(argc,argv,env);
return 0;
}
if (main_root)
op_free(main_root);
main_root = 0;
switch (Sigsetjmp(top_env,1)) {
case 1:
#ifdef VMS
statusvalue = 255;
#else
statusvalue = 1;
#endif
case 2:
curstash = defstash;
if (endav)
calllist(endav);
return(statusvalue); /* my_exit() was called */
case 3:
PerlIO_printf(PerlIO_stderr(), "panic: top_env\n");
return 1;
}
sv_setpvn(linestr,"",0);
sv = newSVpv("",0); /* first used for -I flags */
SAVEFREESV(sv);
init_main_stash();
for (argc--,argv++; argc > 0; argc--,argv++) {
if (argv[0][0] != '-' || !argv[0][1])
break;
#ifdef DOSUID
if (*validarg)
validarg = " PHOOEY ";
else
validarg = argv[0];
#endif
s = argv[0]+1;
reswitch:
switch (*s) {
case '0':
case 'F':
case 'a':
case 'c':
case 'd':
case 'D':
case 'h':
case 'i':
case 'l':
case 'M':
case 'm':
case 'n':
case 'p':
case 's':
case 'T':
case 'u':
case 'U':
case 'v':
case 'w':
if (s = moreswitches(s))
goto reswitch;
break;
case 'e':
if (euid != uid || egid != gid)
croak("No -e allowed in setuid scripts");
if (!e_fp) {
e_tmpname = savepv(TMPPATH);
(void)mktemp(e_tmpname);
if (!*e_tmpname)
croak("Can't mktemp()");
e_fp = PerlIO_open(e_tmpname,"w");
if (!e_fp)
croak("Cannot open temporary file");
}
if (*++s)
PerlIO_puts(e_fp,s);
else if (argv[1]) {
PerlIO_puts(e_fp,argv[1]);
argc--,argv++;
}
else
croak("No code specified for -e");
(void)PerlIO_putc(e_fp,'\n');
break;
case 'I':
taint_not("-I");
sv_catpv(sv,"-");
sv_catpv(sv,s);
sv_catpv(sv," ");
if (*++s) {
av_push(GvAVn(incgv),newSVpv(s,0));
}
else if (argv[1]) {
av_push(GvAVn(incgv),newSVpv(argv[1],0));
sv_catpv(sv,argv[1]);
argc--,argv++;
sv_catpv(sv," ");
}
break;
case 'P':
taint_not("-P");
preprocess = TRUE;
s++;
goto reswitch;
case 'S':
taint_not("-S");
dosearch = TRUE;
s++;
goto reswitch;
case 'V':
if (!preambleav)
preambleav = newAV();
av_push(preambleav, newSVpv("use Config qw(myconfig config_vars)",0));
if (*++s != ':') {
Sv = newSVpv("print myconfig();",0);
#ifdef VMS
sv_catpv(Sv,"print \"\\nCharacteristics of this PERLSHR image: \\n\",");
#else
sv_catpv(Sv,"print \"\\nCharacteristics of this binary (from libperl): \\n\",");
#endif
#if defined(DEBUGGING) || defined(NOEMBED) || defined(MULTIPLICITY)
strcpy(buf,"\" Compile-time options:");
# ifdef DEBUGGING
strcat(buf," DEBUGGING");
# endif
# ifdef NOEMBED
strcat(buf," NOEMBED");
# endif
# ifdef MULTIPLICITY
strcat(buf," MULTIPLICITY");
# endif
strcat(buf,"\\n\",");
sv_catpv(Sv,buf);
#endif
#if defined(LOCAL_PATCH_COUNT)
if (LOCAL_PATCH_COUNT > 0)
{ int i;
sv_catpv(Sv,"print \" Locally applied patches:\\n\",");
for (i = 1; i <= LOCAL_PATCH_COUNT; i++) {
if (localpatches[i]) {
sprintf(buf,"\" \\t%s\\n\",",localpatches[i]);
sv_catpv(Sv,buf);
}
}
}
#endif
sprintf(buf,"\" Built under %s\\n\",",OSNAME);
sv_catpv(Sv,buf);
#ifdef __DATE__
# ifdef __TIME__
sprintf(buf,"\" Compiled at %s %s\\n\"",__DATE__,__TIME__);
# else
sprintf(buf,"\" Compiled on %s\\n\"",__DATE__);
# endif
sv_catpv(Sv,buf);
#endif
sv_catpv(Sv,"; $\"=\"\\n \"; print \" \\@INC:\\n @INC\\n\"");
}
else {
Sv = newSVpv("config_vars(qw(",0);
sv_catpv(Sv, ++s);
sv_catpv(Sv, "))");
s += strlen(s);
}
av_push(preambleav, Sv);
scriptname = BIT_BUCKET; /* don't look for script or read stdin */
goto reswitch;
case 'x':
doextract = TRUE;
s++;
if (*s)
cddir = savepv(s);
break;
case '-':
argc--,argv++;
goto switch_end;
case 0:
break;
default:
croak("Unrecognized switch: -%s",s);
}
}
switch_end:
if (!scriptname)
scriptname = argv[0];
if (e_fp) {
if (PerlIO_flush(e_fp) || PerlIO_error(e_fp) || PerlIO_close(e_fp))
croak("Can't write to temp file for -e: %s", Strerror(errno));
e_fp = Nullfp;
argc++,argv--;
scriptname = e_tmpname;
}
else if (scriptname == Nullch) {
#ifdef MSDOS
if ( isatty(PerlIO_fileno(PerlIO_stdin())) )
moreswitches("v");
#endif
scriptname = "-";
}
init_perllib();
open_script(scriptname,dosearch,sv);
validate_suid(validarg, scriptname);
if (doextract)
find_beginning();
compcv = (CV*)NEWSV(1104,0);
sv_upgrade((SV *)compcv, SVt_PVCV);
comppad = newAV();
av_push(comppad, Nullsv);
curpad = AvARRAY(comppad);
comppad_name = newAV();
comppad_name_fill = 0;
min_intro_pending = 0;
padix = 0;
comppadlist = newAV();
AvREAL_off(comppadlist);
av_store(comppadlist, 0, (SV*)comppad_name);
av_store(comppadlist, 1, (SV*)comppad);
CvPADLIST(compcv) = comppadlist;
boot_core_UNIVERSAL();
if (xsinit)
(*xsinit)(); /* in case linked C routines want magical variables */
#ifdef VMS
init_os_extras();
#endif
init_predump_symbols();
if (!do_undump)
init_postdump_symbols(argc,argv,env);
init_lexer();
/* now parse the script */
error_count = 0;
if (yyparse() || error_count) {
if (minus_c)
croak("%s had compilation errors.\n", origfilename);
else {
croak("Execution of %s aborted due to compilation errors.\n",
origfilename);
}
}
curcop->cop_line = 0;
curstash = defstash;
preprocess = FALSE;
if (e_tmpname) {
(void)UNLINK(e_tmpname);
Safefree(e_tmpname);
e_tmpname = Nullch;
}
/* now that script is parsed, we can modify record separator */
SvREFCNT_dec(rs);
rs = SvREFCNT_inc(nrs);
sv_setsv(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), rs);
if (do_undump)
my_unexec();
if (dowarn)
gv_check(defstash);
LEAVE;
FREETMPS;
#ifdef DEBUGGING_MSTATS
if ((s=getenv("PERL_DEBUG_MSTATS")) && atoi(s) >= 2)
dump_mstats("after compilation:");
#endif
ENTER;
restartop = 0;
return 0;
}
int
perl_run(sv_interp)
PerlInterpreter *sv_interp;
{
if (!(curinterp = sv_interp))
return 255;
switch (Sigsetjmp(top_env,1)) {
case 1:
cxstack_ix = -1; /* start context stack again */
break;
case 2:
curstash = defstash;
if (endav)
calllist(endav);
FREETMPS;
#ifdef DEBUGGING_MSTATS
if (getenv("PERL_DEBUG_MSTATS"))
dump_mstats("after execution: ");
#endif
return(statusvalue); /* my_exit() was called */
case 3:
if (!restartop) {
PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
FREETMPS;
return 1;
}
if (curstack != mainstack) {
dSP;
SWITCHSTACK(curstack, mainstack);
}
break;
}
DEBUG_r(PerlIO_printf(PerlIO_stderr(), "%s $` $& $' support.\n",
sawampersand ? "Enabling" : "Omitting"));
if (!restartop) {
DEBUG_x(dump_all());
DEBUG(PerlIO_printf(Perl_debug_log, "\nEXECUTING...\n\n"));
if (minus_c) {
PerlIO_printf(PerlIO_stderr(), "%s syntax OK\n", origfilename);
my_exit(0);
}
if (perldb && DBsingle)
sv_setiv(DBsingle, 1);
}
/* do it */
if (restartop) {
op = restartop;
restartop = 0;
runops();
}
else if (main_start) {
op = main_start;
runops();
}
my_exit(0);
return 0;
}
void
my_exit(status)
U32 status;
{
register CONTEXT *cx;
I32 gimme;
SV **newsp;
statusvalue = FIXSTATUS(status);
if (cxstack_ix >= 0) {
if (cxstack_ix > 0)
dounwind(0);
POPBLOCK(cx,curpm);
LEAVE;
}
Siglongjmp(top_env, 2);
}
SV*
perl_get_sv(name, create)
char* name;
I32 create;
{
GV* gv = gv_fetchpv(name, create, SVt_PV);
if (gv)
return GvSV(gv);
return Nullsv;
}
AV*
perl_get_av(name, create)
char* name;
I32 create;
{
GV* gv = gv_fetchpv(name, create, SVt_PVAV);
if (create)
return GvAVn(gv);
if (gv)
return GvAV(gv);
return Nullav;
}
HV*
perl_get_hv(name, create)
char* name;
I32 create;
{
GV* gv = gv_fetchpv(name, create, SVt_PVHV);
if (create)
return GvHVn(gv);
if (gv)
return GvHV(gv);
return Nullhv;
}
CV*
perl_get_cv(name, create)
char* name;
I32 create;
{
GV* gv = gv_fetchpv(name, create, SVt_PVCV);
if (create && !GvCV(gv))
return newSUB(start_subparse(),
newSVOP(OP_CONST, 0, newSVpv(name,0)),
Nullop,
Nullop);
if (gv)
return GvCV(gv);
return Nullcv;
}
/* Be sure to refetch the stack pointer after calling these routines. */
I32
perl_call_argv(subname, flags, argv)
char *subname;
I32 flags; /* See G_* flags in cop.h */
register char **argv; /* null terminated arg list */
{
dSP;
PUSHMARK(sp);
if (argv) {
while (*argv) {
XPUSHs(sv_2mortal(newSVpv(*argv,0)));
argv++;
}
PUTBACK;
}
return perl_call_pv(subname, flags);
}
I32
perl_call_pv(subname, flags)
char *subname; /* name of the subroutine */
I32 flags; /* See G_* flags in cop.h */
{
return perl_call_sv((SV*)perl_get_cv(subname, TRUE), flags);
}
I32
perl_call_method(methname, flags)
char *methname; /* name of the subroutine */
I32 flags; /* See G_* flags in cop.h */
{
dSP;
OP myop;
if (!op)
op = &myop;
XPUSHs(sv_2mortal(newSVpv(methname,0)));
PUTBACK;
pp_method();
return perl_call_sv(*stack_sp--, flags);
}
/* May be called with any of a CV, a GV, or an SV containing the name. */
I32
perl_call_sv(sv, flags)
SV* sv;
I32 flags; /* See G_* flags in cop.h */
{
LOGOP myop; /* fake syntax tree node */
SV** sp = stack_sp;
I32 oldmark = TOPMARK;
I32 retval;
Sigjmp_buf oldtop;
I32 oldscope;
static CV *DBcv;
if (flags & G_DISCARD) {
ENTER;
SAVETMPS;
}
SAVESPTR(op);
op = (OP*)&myop;
Zero(op, 1, LOGOP);
EXTEND(stack_sp, 1);
*++stack_sp = sv;
oldscope = scopestack_ix;
if (!(flags & G_NOARGS))
myop.op_flags = OPf_STACKED;
myop.op_next = Nullop;
myop.op_flags |= OPf_KNOW;
if (flags & G_ARRAY)
myop.op_flags |= OPf_LIST;
if (perldb && curstash != debstash
&& (DBcv || (DBcv = GvCV(DBsub)))) /* to handle first BEGIN of -d */
op->op_private |= OPpENTERSUB_DB;
if (flags & G_EVAL) {
Copy(top_env, oldtop, 1, Sigjmp_buf);
cLOGOP->op_other = op;
markstack_ptr--;
/* we're trying to emulate pp_entertry() here */
{
register CONTEXT *cx;
I32 gimme = GIMME;
ENTER;
SAVETMPS;
push_return(op->op_next);
PUSHBLOCK(cx, CXt_EVAL, stack_sp);
PUSHEVAL(cx, 0, 0);
eval_root = op; /* Only needed so that goto works right. */
in_eval = 1;
if (flags & G_KEEPERR)
in_eval |= 4;
else
sv_setpv(GvSV(errgv),"");
}
markstack_ptr++;
restart:
switch (Sigsetjmp(top_env,1)) {
case 0:
break;
case 1:
#ifdef VMS
statusvalue = 255; /* XXX I don't think we use 1 anymore. */
#else
statusvalue = 1;
#endif
/* FALL THROUGH */
case 2:
/* my_exit() was called */
curstash = defstash;
FREETMPS;
Copy(oldtop, top_env, 1, Sigjmp_buf);
if (statusvalue)
croak("Callback called exit");
my_exit(statusvalue);
/* NOTREACHED */
case 3:
if (restartop) {
op = restartop;
restartop = 0;
goto restart;
}
stack_sp = stack_base + oldmark;
if (flags & G_ARRAY)
retval = 0;
else {
retval = 1;
*++stack_sp = &sv_undef;
}
goto cleanup;
}
}
if (op == (OP*)&myop)
op = pp_entersub();
if (op)
runops();
retval = stack_sp - (stack_base + oldmark);
if ((flags & G_EVAL) && !(flags & G_KEEPERR))
sv_setpv(GvSV(errgv),"");
cleanup:
if (flags & G_EVAL) {
if (scopestack_ix > oldscope) {
SV **newsp;
PMOP *newpm;
I32 gimme;
register CONTEXT *cx;
I32 optype;
POPBLOCK(cx,newpm);
POPEVAL(cx);
pop_return();
curpm = newpm;
LEAVE;
}
Copy(oldtop, top_env, 1, Sigjmp_buf);
}
if (flags & G_DISCARD) {
stack_sp = stack_base + oldmark;
retval = 0;
FREETMPS;
LEAVE;
}
return retval;
}
/* Eval a string. The G_EVAL flag is always assumed. */
I32
perl_eval_sv(sv, flags)
SV* sv;
I32 flags; /* See G_* flags in cop.h */
{
UNOP myop; /* fake syntax tree node */
SV** sp = stack_sp;
I32 oldmark = sp - stack_base;
I32 retval;
Sigjmp_buf oldtop;
I32 oldscope;
if (flags & G_DISCARD) {
ENTER;
SAVETMPS;
}
SAVESPTR(op);
op = (OP*)&myop;
Zero(op, 1, UNOP);
EXTEND(stack_sp, 1);
*++stack_sp = sv;
oldscope = scopestack_ix;
if (!(flags & G_NOARGS))
myop.op_flags = OPf_STACKED;
myop.op_next = Nullop;
myop.op_type = OP_ENTEREVAL;
myop.op_flags |= OPf_KNOW;
if (flags & G_KEEPERR)
myop.op_flags |= OPf_SPECIAL;
if (flags & G_ARRAY)
myop.op_flags |= OPf_LIST;
Copy(top_env, oldtop, 1, Sigjmp_buf);
restart:
switch (Sigsetjmp(top_env,1)) {
case 0:
break;
case 1:
#ifdef VMS
statusvalue = 255; /* XXX I don't think we use 1 anymore. */
#else
statusvalue = 1;
#endif
/* FALL THROUGH */
case 2:
/* my_exit() was called */
curstash = defstash;
FREETMPS;
Copy(oldtop, top_env, 1, Sigjmp_buf);
if (statusvalue)
croak("Callback called exit");
my_exit(statusvalue);
/* NOTREACHED */
case 3:
if (restartop) {
op = restartop;
restartop = 0;
goto restart;
}
stack_sp = stack_base + oldmark;
if (flags & G_ARRAY)
retval = 0;
else {
retval = 1;
*++stack_sp = &sv_undef;
}
goto cleanup;
}
if (op == (OP*)&myop)
op = pp_entereval();
if (op)
runops();
retval = stack_sp - (stack_base + oldmark);
if (!(flags & G_KEEPERR))
sv_setpv(GvSV(errgv),"");
cleanup:
Copy(oldtop, top_env, 1, Sigjmp_buf);
if (flags & G_DISCARD) {
stack_sp = stack_base + oldmark;
retval = 0;
FREETMPS;
LEAVE;
}
return retval;
}
/* Require a module. */
void
perl_require_pv(pv)
char* pv;
{
SV* sv = sv_newmortal();
sv_setpv(sv, "require '");
sv_catpv(sv, pv);
sv_catpv(sv, "'");
perl_eval_sv(sv, G_DISCARD);
}
void
magicname(sym,name,namlen)
char *sym;
char *name;
I32 namlen;
{
register GV *gv;
if (gv = gv_fetchpv(sym,TRUE, SVt_PV))
sv_magic(GvSV(gv), (SV*)gv, 0, name, namlen);
}
#if defined(DOSISH)
# define PERLLIB_SEP ';'
#else
# if defined(VMS)
# define PERLLIB_SEP '|'
# else
# define PERLLIB_SEP ':'
# endif
#endif
#ifndef PERLLIB_MANGLE
# define PERLLIB_MANGLE(s,n) (s)
#endif
static void
incpush(p)
char *p;
{
char *s;
if (!p)
return;
/* Break at all separators */
while (*p) {
/* First, skip any consecutive separators */
while ( *p == PERLLIB_SEP ) {
/* Uncomment the next line for PATH semantics */
/* av_push(GvAVn(incgv), newSVpv(".", 1)); */
p++;
}
if ( (s = strchr(p, PERLLIB_SEP)) != Nullch ) {
av_push(GvAVn(incgv), newSVpv(PERLLIB_MANGLE(p, (STRLEN)(s - p)),
(STRLEN)(s - p)));
p = s + 1;
} else {
av_push(GvAVn(incgv), newSVpv(PERLLIB_MANGLE(p, 0), 0));
break;
}
}
}
static void
usage(name) /* XXX move this out into a module ? */
char *name;
{
/* This message really ought to be max 23 lines.
* Removed -h because the user already knows that opton. Others? */
printf("\nUsage: %s [switches] [--] [programfile] [arguments]", name);
printf("\n -0[octal] specify record separator (\\0, if no argument)");
printf("\n -a autosplit mode with -n or -p (splits $_ into @F)");
printf("\n -c check syntax only (runs BEGIN and END blocks)");
printf("\n -d[:debugger] run scripts under debugger");
printf("\n -D[number/list] set debugging flags (argument is a bit mask or flags)");
printf("\n -e 'command' one line of script. Several -e's allowed. Omit [programfile].");
printf("\n -F/pattern/ split() pattern for autosplit (-a). The //'s are optional.");
printf("\n -i[extension] edit <> files in place (make backup if extension supplied)");
printf("\n -Idirectory specify @INC/#include directory (may be used more then once)");
printf("\n -l[octal] enable line ending processing, specifies line teminator");
printf("\n -[mM][-]module.. executes `use/no module...' before executing your script.");
printf("\n -n assume 'while (<>) { ... }' loop arround your script");
printf("\n -p assume loop like -n but print line also like sed");
printf("\n -P run script through C preprocessor before compilation");
printf("\n -s enable some switch parsing for switches after script name");
printf("\n -S look for the script using PATH environment variable");
printf("\n -T turn on tainting checks");
printf("\n -u dump core after parsing script");
printf("\n -U allow unsafe operations");
printf("\n -v print version number and patchlevel of perl");
printf("\n -V[:variable] print perl configuration information");
printf("\n -w TURN WARNINGS ON FOR COMPILATION OF YOUR SCRIPT.");
printf("\n -x[directory] strip off text before #!perl line and perhaps cd to directory\n");
}
/* This routine handles any switches that can be given during run */
char *
moreswitches(s)
char *s;
{
I32 numlen;
U32 rschar;
switch (*s) {
case '0':
rschar = scan_oct(s, 4, &numlen);
SvREFCNT_dec(nrs);
if (rschar & ~((U8)~0))
nrs = &sv_undef;
else if (!rschar && numlen >= 2)
nrs = newSVpv("", 0);
else {
char ch = rschar;
nrs = newSVpv(&ch, 1);
}
return s + numlen;
case 'F':
minus_F = TRUE;
splitstr = savepv(s + 1);
s += strlen(s);
return s;
case 'a':
minus_a = TRUE;
s++;
return s;
case 'c':
minus_c = TRUE;
s++;
return s;
case 'd':
taint_not("-d");
s++;
if (*s == ':' || *s == '=') {
sprintf(buf, "use Devel::%s;", ++s);
s += strlen(s);
my_setenv("PERL5DB",buf);
}
if (!perldb) {
perldb = TRUE;
init_debugger();
}
return s;
case 'D':
#ifdef DEBUGGING
taint_not("-D");
if (isALPHA(s[1])) {
static char debopts[] = "psltocPmfrxuLHXD";
char *d;
for (s++; *s && (d = strchr(debopts,*s)); s++)
debug |= 1 << (d - debopts);
}
else {
debug = atoi(s+1);
for (s++; isDIGIT(*s); s++) ;
}
debug |= 0x80000000;
#else
warn("Recompile perl with -DDEBUGGING to use -D switch\n");
for (s++; isALNUM(*s); s++) ;
#endif
/*SUPPRESS 530*/
return s;
case 'h':
usage(origargv[0]);
exit(0);
case 'i':
if (inplace)
Safefree(inplace);
inplace = savepv(s+1);
/*SUPPRESS 530*/
for (s = inplace; *s && !isSPACE(*s); s++) ;
*s = '\0';
break;
case 'I':
taint_not("-I");
if (*++s) {
char *e;
for (e = s; *e && !isSPACE(*e); e++) ;
av_push(GvAVn(incgv),newSVpv(s,e-s));
if (*e)
return e;
}
else
croak("No space allowed after -I");
break;
case 'l':
minus_l = TRUE;
s++;
if (ors)
Safefree(ors);
if (isDIGIT(*s)) {
ors = savepv("\n");
orslen = 1;
*ors = scan_oct(s, 3 + (*s == '0'), &numlen);
s += numlen;
}
else {
if (RsPARA(nrs)) {
ors = "\n\n";
orslen = 2;
}
else
ors = SvPV(nrs, orslen);
ors = savepvn(ors, orslen);
}
return s;
case 'M':
taint_not("-M"); /* XXX ? */
/* FALL THROUGH */
case 'm':
taint_not("-m"); /* XXX ? */
if (*++s) {
char *start;
char *use = "use ";
/* -M-foo == 'no foo' */
if (*s == '-') { use = "no "; ++s; }
Sv = newSVpv(use,0);
start = s;
/* We allow -M'Module qw(Foo Bar)' */
while(isALNUM(*s) || *s==':') ++s;
if (*s != '=') {
sv_catpv(Sv, start);
if (*(start-1) == 'm') {
if (*s != '\0')
croak("Can't use '%c' after -mname", *s);
sv_catpv( Sv, " ()");
}
} else {
sv_catpvn(Sv, start, s-start);
sv_catpv(Sv, " split(/,/,q{");
sv_catpv(Sv, ++s);
sv_catpv(Sv, "})");
}
s += strlen(s);
if (preambleav == NULL)
preambleav = newAV();
av_push(preambleav, Sv);
}
else
croak("No space allowed after -%c", *(s-1));
return s;
case 'n':
minus_n = TRUE;
s++;
return s;
case 'p':
minus_p = TRUE;
s++;
return s;
case 's':
taint_not("-s");
doswitches = TRUE;
s++;
return s;
case 'T':
tainting = TRUE;
s++;
return s;
case 'u':
do_undump = TRUE;
s++;
return s;
case 'U':
unsafe = TRUE;
s++;
return s;
case 'v':
#if defined(SUBVERSION) && SUBVERSION > 0
printf("\nThis is perl, version 5.%03d_%02d", PATCHLEVEL, SUBVERSION);
#else
printf("\nThis is perl, version %s",patchlevel);
#endif
printf("\n\nCopyright 1987-1996, Larry Wall\n");
printf("\n\t+ suidperl security patch");
#ifdef MSDOS
printf("MS-DOS port Copyright (c) 1989, 1990, Diomidis Spinellis\n");
#endif
#ifdef OS2
printf("\n\nOS/2 port Copyright (c) 1990, 1991, Raymond Chen, Kai Uwe Rommel\n"
"Version 5 port Copyright (c) 1994-1996, Andreas Kaiser, Ilya Zakharevich\n");
#endif
#ifdef atarist
printf("atariST series port, ++jrb bammi@cadence.com\n");
#endif
printf("\n\
Perl may be copied only under the terms of either the Artistic License or the\n\
GNU General Public License, which may be found in the Perl 5.0 source kit.\n\n");
#ifdef MSDOS
usage(origargv[0]);
#endif
exit(0);
case 'w':
dowarn = TRUE;
s++;
return s;
case '*':
case ' ':
if (s[1] == '-') /* Additional switches on #! line. */
return s+2;
break;
case '-':
case 0:
case '\n':
case '\t':
break;
case 'P':
if (preprocess)
return s+1;
/* FALL THROUGH */
default:
croak("Can't emulate -%.1s on #! line",s);
}
return Nullch;
}
/* compliments of Tom Christiansen */
/* unexec() can be found in the Gnu emacs distribution */
void
my_unexec()
{
#ifdef UNEXEC
int status;
extern int etext;
sprintf (buf, "%s.perldump", origfilename);
sprintf (tokenbuf, "%s/perl", BIN);
status = unexec(buf, tokenbuf, &etext, sbrk(0), 0);
if (status)
PerlIO_printf(PerlIO_stderr(), "unexec of %s into %s failed!\n", tokenbuf, buf);
exit(status);
#else
# ifdef VMS
# include <lib$routines.h>
lib$signal(SS$_DEBUG); /* ssdef.h #included from vmsish.h */
#else
ABORT(); /* for use with undump */
#endif
#endif
}
static void
init_main_stash()
{
GV *gv;
/* Note that strtab is a rather special HV. Assumptions are made
about not iterating on it, and not adding tie magic to it.
It is properly deallocated in perl_destruct() */
strtab = newHV();
HvSHAREKEYS_off(strtab); /* mandatory */
Newz(506,((XPVHV*)SvANY(strtab))->xhv_array,
sizeof(HE*) * (((XPVHV*)SvANY(strtab))->xhv_max + 1), char);
curstash = defstash = newHV();
curstname = newSVpv("main",4);
gv = gv_fetchpv("main::",TRUE, SVt_PVHV);
SvREFCNT_dec(GvHV(gv));
GvHV(gv) = (HV*)SvREFCNT_inc(defstash);
SvREADONLY_on(gv);
HvNAME(defstash) = savepv("main");
incgv = gv_HVadd(gv_AVadd(gv_fetchpv("INC",TRUE, SVt_PVAV)));
GvMULTI_on(incgv);
defgv = gv_fetchpv("_",TRUE, SVt_PVAV);
errgv = gv_HVadd(gv_fetchpv("@", TRUE, SVt_PV));
GvMULTI_on(errgv);
sv_setpvn(GvSV(errgv), "", 0);
curstash = defstash;
compiling.cop_stash = defstash;
debstash = GvHV(gv_fetchpv("DB::", GV_ADDMULTI, SVt_PVHV));
/* We must init $/ before switches are processed. */
sv_setpvn(GvSV(gv_fetchpv("/", TRUE, SVt_PV)), "\n", 1);
}
#ifdef CAN_PROTOTYPE
static void
open_script(char *scriptname, bool dosearch, SV *sv)
#else
static void
open_script(scriptname,dosearch,sv)
char *scriptname;
bool dosearch;
SV *sv;
#endif
{
char *xfound = Nullch;
char *xfailed = Nullch;
register char *s;
I32 len;
int retval;
#if defined(DOSISH) && !defined(OS2) && !defined(atarist)
#define SEARCH_EXTS ".bat", ".cmd", NULL
#endif
#ifdef VMS
# define SEARCH_EXTS ".pl", ".com", NULL
#endif
/* additional extensions to try in each dir if scriptname not found */
#ifdef SEARCH_EXTS
char *ext[] = { SEARCH_EXTS };
int extidx = (strchr(scriptname,'.')) ? -1 : 0; /* has ext already */
#endif
#ifdef VMS
if (dosearch) {
int hasdir, idx = 0, deftypes = 1;
hasdir = (strpbrk(scriptname,":[</") != Nullch) ;
/* The first time through, just add SEARCH_EXTS to whatever we
* already have, so we can check for default file types. */
while (deftypes || (!hasdir && my_trnlnm("DCL$PATH",tokenbuf,idx++)) ) {
if (deftypes) { deftypes = 0; *tokenbuf = '\0'; }
strcat(tokenbuf,scriptname);
#else /* !VMS */
if (dosearch && !strchr(scriptname, '/') && (s = getenv("PATH"))) {
bufend = s + strlen(s);
while (*s) {
#ifndef DOSISH
s = cpytill(tokenbuf,s,bufend,':',&len);
#else
#ifdef atarist
for (len = 0; *s && *s != ',' && *s != ';'; tokenbuf[len++] = *s++);
tokenbuf[len] = '\0';
#else
for (len = 0; *s && *s != ';'; tokenbuf[len++] = *s++);
tokenbuf[len] = '\0';
#endif
#endif
if (*s)
s++;
#ifndef DOSISH
if (len && tokenbuf[len-1] != '/')
#else
#ifdef atarist
if (len && ((tokenbuf[len-1] != '\\') && (tokenbuf[len-1] != '/')))
#else
if (len && tokenbuf[len-1] != '\\')
#endif
#endif
(void)strcat(tokenbuf+len,"/");
(void)strcat(tokenbuf+len,scriptname);
#endif /* !VMS */
#ifdef SEARCH_EXTS
len = strlen(tokenbuf);
if (extidx > 0) /* reset after previous loop */
extidx = 0;
do {
#endif
DEBUG_p(PerlIO_printf(Perl_debug_log, "Looking for %s\n",tokenbuf));
retval = Stat(tokenbuf,&statbuf);
#ifdef SEARCH_EXTS
} while ( retval < 0 /* not there */
&& extidx>=0 && ext[extidx] /* try an extension? */
&& strcpy(tokenbuf+len, ext[extidx++])
);
#endif
if (retval < 0)
continue;
if (S_ISREG(statbuf.st_mode)
&& cando(S_IRUSR,TRUE,&statbuf) && cando(S_IXUSR,TRUE,&statbuf)) {
xfound = tokenbuf; /* bingo! */
break;
}
if (!xfailed)
xfailed = savepv(tokenbuf);
}
if (!xfound)
croak("Can't execute %s", xfailed ? xfailed : scriptname );
if (xfailed)
Safefree(xfailed);
scriptname = xfound;
}
if (strnEQ(scriptname, "/dev/fd/", 8) && isDIGIT(scriptname[8]) ) {
char *s = scriptname + 8;
fdscript = atoi(s);
while (isDIGIT(*s))
s++;
if (*s)
scriptname = s + 1;
}
else
fdscript = -1;
origfilename = savepv(e_tmpname ? "-e" : scriptname);
curcop->cop_filegv = gv_fetchfile(origfilename);
if (strEQ(origfilename,"-"))
scriptname = "";
if (fdscript >= 0) {
rsfp = PerlIO_fdopen(fdscript,"r");
#if defined(HAS_FCNTL) && defined(F_SETFD)
fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
#endif
}
else if (preprocess) {
char *cpp = CPPSTDIN;
if (strEQ(cpp,"cppstdin"))
sprintf(tokenbuf, "%s/%s", SCRIPTDIR, cpp);
else
sprintf(tokenbuf, "%s", cpp);
sv_catpv(sv,"-I");
sv_catpv(sv,PRIVLIB_EXP);
#ifdef MSDOS
(void)sprintf(buf, "\
sed %s -e \"/^[^#]/b\" \
-e \"/^#[ ]*include[ ]/b\" \
-e \"/^#[ ]*define[ ]/b\" \
-e \"/^#[ ]*if[ ]/b\" \
-e \"/^#[ ]*ifdef[ ]/b\" \
-e \"/^#[ ]*ifndef[ ]/b\" \
-e \"/^#[ ]*else/b\" \
-e \"/^#[ ]*elif[ ]/b\" \
-e \"/^#[ ]*undef[ ]/b\" \
-e \"/^#[ ]*endif/b\" \
-e \"s/^#.*//\" \
%s | %s -C %s %s",
(doextract ? "-e \"1,/^#/d\n\"" : ""),
#else
(void)sprintf(buf, "\
%s %s -e '/^[^#]/b' \
-e '/^#[ ]*include[ ]/b' \
-e '/^#[ ]*define[ ]/b' \
-e '/^#[ ]*if[ ]/b' \
-e '/^#[ ]*ifdef[ ]/b' \
-e '/^#[ ]*ifndef[ ]/b' \
-e '/^#[ ]*else/b' \
-e '/^#[ ]*elif[ ]/b' \
-e '/^#[ ]*undef[ ]/b' \
-e '/^#[ ]*endif/b' \
-e 's/^[ ]*#.*//' \
%s | %s -C %s %s",
#ifdef LOC_SED
LOC_SED,
#else
"sed",
#endif
(doextract ? "-e '1,/^#/d\n'" : ""),
#endif
scriptname, tokenbuf, SvPV(sv, na), CPPMINUS);
doextract = FALSE;
#ifdef IAMSUID /* actually, this is caught earlier */
if (euid != uid && !euid) { /* if running suidperl */
#ifdef HAS_SETEUID
(void)seteuid(uid); /* musn't stay setuid root */
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1, uid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1, uid, (Uid_t)-1);
#else
setuid(uid);
#endif
#endif
#endif
if (geteuid() != uid)
croak("Can't do seteuid!\n");
}
#endif /* IAMSUID */
rsfp = my_popen(buf,"r");
}
else if (!*scriptname) {
taint_not("program input from stdin");
rsfp = PerlIO_stdin();
}
else {
rsfp = PerlIO_open(scriptname,"r");
#if defined(HAS_FCNTL) && defined(F_SETFD)
fcntl(PerlIO_fileno(rsfp),F_SETFD,1); /* ensure close-on-exec */
#endif
}
if (e_tmpname) {
e_fp = rsfp;
}
if ((PerlIO*)rsfp == Nullfp) {
#ifdef DOSUID
#ifndef IAMSUID /* in case script is not readable before setuid */
if (euid && Stat(SvPVX(GvSV(curcop->cop_filegv)),&statbuf) >= 0 &&
statbuf.st_mode & (S_ISUID|S_ISGID)) {
(void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
execv(buf, origargv); /* try again */
croak("Can't do setuid\n");
}
#endif
#endif
croak("Can't open perl script \"%s\": %s\n",
SvPVX(GvSV(curcop->cop_filegv)), Strerror(errno));
}
}
static void
validate_suid(validarg, scriptname)
char *validarg;
char *scriptname;
{
int which;
/* do we need to emulate setuid on scripts? */
/* This code is for those BSD systems that have setuid #! scripts disabled
* in the kernel because of a security problem. Merely defining DOSUID
* in perl will not fix that problem, but if you have disabled setuid
* scripts in the kernel, this will attempt to emulate setuid and setgid
* on scripts that have those now-otherwise-useless bits set. The setuid
* root version must be called suidperl or sperlN.NNN. If regular perl
* discovers that it has opened a setuid script, it calls suidperl with
* the same argv that it had. If suidperl finds that the script it has
* just opened is NOT setuid root, it sets the effective uid back to the
* uid. We don't just make perl setuid root because that loses the
* effective uid we had before invoking perl, if it was different from the
* uid.
*
* DOSUID must be defined in both perl and suidperl, and IAMSUID must
* be defined in suidperl only. suidperl must be setuid root. The
* Configure script will set this up for you if you want it.
*/
#ifdef DOSUID
char *s, *s2;
if (Fstat(PerlIO_fileno(rsfp),&statbuf) < 0) /* normal stat is insecure */
croak("Can't stat script \"%s\"",origfilename);
if (fdscript < 0 && statbuf.st_mode & (S_ISUID|S_ISGID)) {
I32 len;
#ifdef IAMSUID
#ifndef HAS_SETREUID
/* On this access check to make sure the directories are readable,
* there is actually a small window that the user could use to make
* filename point to an accessible directory. So there is a faint
* chance that someone could execute a setuid script down in a
* non-accessible directory. I don't know what to do about that.
* But I don't think it's too important. The manual lies when
* it says access() is useful in setuid programs.
*/
if (access(SvPVX(GvSV(curcop->cop_filegv)),1)) /*double check*/
croak("Permission denied");
#else
/* If we can swap euid and uid, then we can determine access rights
* with a simple stat of the file, and then compare device and
* inode to make sure we did stat() on the same file we opened.
* Then we just have to make sure he or she can execute it.
*/
{
struct stat tmpstatbuf;
if (
#ifdef HAS_SETREUID
setreuid(euid,uid) < 0
#else
# if HAS_SETRESUID
setresuid(euid,uid,(Uid_t)-1) < 0
# endif
#endif
|| getuid() != euid || geteuid() != uid)
croak("Can't swap uid and euid"); /* really paranoid */
if (Stat(SvPVX(GvSV(curcop->cop_filegv)),&tmpstatbuf) < 0)
croak("Permission denied"); /* testing full pathname here */
if (tmpstatbuf.st_dev != statbuf.st_dev ||
tmpstatbuf.st_ino != statbuf.st_ino) {
(void)PerlIO_close(rsfp);
if (rsfp = my_popen("/bin/mail root","w")) { /* heh, heh */
PerlIO_printf(rsfp,
"User %d tried to run dev %d ino %d in place of dev %d ino %d!\n\
(Filename of set-id script was %s, uid %d gid %d.)\n\nSincerely,\nperl\n",
uid,tmpstatbuf.st_dev, tmpstatbuf.st_ino,
statbuf.st_dev, statbuf.st_ino,
SvPVX(GvSV(curcop->cop_filegv)),
statbuf.st_uid, statbuf.st_gid);
(void)my_pclose(rsfp);
}
croak("Permission denied\n");
}
if (
#ifdef HAS_SETREUID
setreuid(uid,euid) < 0
#else
# if defined(HAS_SETRESUID)
setresuid(uid,euid,(Uid_t)-1) < 0
# endif
#endif
|| getuid() != uid || geteuid() != euid)
croak("Can't reswap uid and euid");
if (!cando(S_IXUSR,FALSE,&statbuf)) /* can real uid exec? */
croak("Permission denied\n");
}
#endif /* HAS_SETREUID */
#endif /* IAMSUID */
if (!S_ISREG(statbuf.st_mode))
croak("Permission denied");
if (statbuf.st_mode & S_IWOTH)
croak("Setuid/gid script is writable by world");
doswitches = FALSE; /* -s is insecure in suid */
curcop->cop_line++;
if (sv_gets(linestr, rsfp, 0) == Nullch ||
strnNE(SvPV(linestr,na),"#!",2) ) /* required even on Sys V */
croak("No #! line");
s = SvPV(linestr,na)+2;
if (*s == ' ') s++;
while (!isSPACE(*s)) s++;
for (s2 = s; (s2 > SvPV(linestr,na)+2 &&
(isDIGIT(s2[-1]) || strchr("._-", s2[-1]))); s2--) ;
if (strnNE(s2-4,"perl",4) && strnNE(s-9,"perl",4)) /* sanity check */
croak("Not a perl script");
while (*s == ' ' || *s == '\t') s++;
/*
* #! arg must be what we saw above. They can invoke it by
* mentioning suidperl explicitly, but they may not add any strange
* arguments beyond what #! says if they do invoke suidperl that way.
*/
len = strlen(validarg);
if (strEQ(validarg," PHOOEY ") ||
strnNE(s,validarg,len) || !isSPACE(s[len]))
croak("Args must match #! line");
#ifndef IAMSUID
if (euid != uid && (statbuf.st_mode & S_ISUID) &&
euid == statbuf.st_uid)
if (!do_undump)
croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
#endif /* IAMSUID */
if (euid) { /* oops, we're not the setuid root perl */
(void)PerlIO_close(rsfp);
#ifndef IAMSUID
(void)sprintf(buf, "%s/sperl%s", BIN, patchlevel);
execv(buf, origargv); /* try again */
#endif
croak("Can't do setuid\n");
}
if (statbuf.st_mode & S_ISGID && statbuf.st_gid != egid) {
#ifdef HAS_SETEGID
(void)setegid(statbuf.st_gid);
#else
#ifdef HAS_SETREGID
(void)setregid((Gid_t)-1,statbuf.st_gid);
#else
#ifdef HAS_SETRESGID
(void)setresgid((Gid_t)-1,statbuf.st_gid,(Gid_t)-1);
#else
setgid(statbuf.st_gid);
#endif
#endif
#endif
if (getegid() != statbuf.st_gid)
croak("Can't do setegid!\n");
}
if (statbuf.st_mode & S_ISUID) {
if (statbuf.st_uid != euid)
#ifdef HAS_SETEUID
(void)seteuid(statbuf.st_uid); /* all that for this */
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1,statbuf.st_uid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1,statbuf.st_uid,(Uid_t)-1);
#else
setuid(statbuf.st_uid);
#endif
#endif
#endif
if (geteuid() != statbuf.st_uid)
croak("Can't do seteuid!\n");
}
else if (uid) { /* oops, mustn't run as root */
#ifdef HAS_SETEUID
(void)seteuid((Uid_t)uid);
#else
#ifdef HAS_SETREUID
(void)setreuid((Uid_t)-1,(Uid_t)uid);
#else
#ifdef HAS_SETRESUID
(void)setresuid((Uid_t)-1,(Uid_t)uid,(Uid_t)-1);
#else
setuid((Uid_t)uid);
#endif
#endif
#endif
if (geteuid() != uid)
croak("Can't do seteuid!\n");
}
init_ids();
if (!cando(S_IXUSR,TRUE,&statbuf))
croak("Permission denied\n"); /* they can't do this */
}
#ifdef IAMSUID
else if (preprocess)
croak("-P not allowed for setuid/setgid script\n");
else if (fdscript >= 0)
croak("fd script not allowed in suidperl\n");
else
croak("Script is not setuid/setgid in suidperl\n");
/* We absolutely must clear out any saved ids here, so we */
/* exec the real perl, substituting fd script for scriptname. */
/* (We pass script name as "subdir" of fd, which perl will grok.) */
PerlIO_rewind(rsfp);
lseek(PerlIO_fileno(rsfp),(Off_t)0,0); /* just in case rewind didn't */
for (which = 1; origargv[which] && origargv[which] != scriptname; which++) ;
if (!origargv[which])
croak("Permission denied");
(void)sprintf(buf, "/dev/fd/%d/%.127s", PerlIO_fileno(rsfp), origargv[which]);
origargv[which] = buf;
#if defined(HAS_FCNTL) && defined(F_SETFD)
fcntl(PerlIO_fileno(rsfp),F_SETFD,0); /* ensure no close-on-exec */
#endif
(void)sprintf(tokenbuf, "%s/perl%s", BIN, patchlevel);
execv(tokenbuf, origargv); /* try again */
croak("Can't do setuid\n");
#endif /* IAMSUID */
#else /* !DOSUID */
if (euid != uid || egid != gid) { /* (suidperl doesn't exist, in fact) */
#ifndef SETUID_SCRIPTS_ARE_SECURE_NOW
Fstat(PerlIO_fileno(rsfp),&statbuf); /* may be either wrapped or real suid */
if ((euid != uid && euid == statbuf.st_uid && statbuf.st_mode & S_ISUID)
||
(egid != gid && egid == statbuf.st_gid && statbuf.st_mode & S_ISGID)
)
if (!do_undump)
croak("YOU HAVEN'T DISABLED SET-ID SCRIPTS IN THE KERNEL YET!\n\
FIX YOUR KERNEL, PUT A C WRAPPER AROUND THIS SCRIPT, OR USE -u AND UNDUMP!\n");
#endif /* SETUID_SCRIPTS_ARE_SECURE_NOW */
/* not set-id, must be wrapped */
}
#endif /* DOSUID */
}
static void
find_beginning()
{
register char *s, *s2;
/* skip forward in input to the real script? */
taint_not("-x");
while (doextract) {
if ((s = sv_gets(linestr, rsfp, 0)) == Nullch)
croak("No Perl script found in input\n");
if (*s == '#' && s[1] == '!' && (s = instr(s,"perl"))) {
PerlIO_ungetc(rsfp, '\n'); /* to keep line count right */
doextract = FALSE;
while (*s && !(isSPACE (*s) || *s == '#')) s++;
s2 = s;
while (*s == ' ' || *s == '\t') s++;
if (*s++ == '-') {
while (isDIGIT(s2[-1]) || strchr("-._", s2[-1])) s2--;
if (strnEQ(s2-4,"perl",4))
/*SUPPRESS 530*/
while (s = moreswitches(s)) ;
}
if (cddir && chdir(cddir) < 0)
croak("Can't chdir to %s",cddir);
}
}
}
static void
init_ids()
{
uid = (int)getuid();
euid = (int)geteuid();
gid = (int)getgid();
egid = (int)getegid();
#ifdef VMS
uid |= gid << 16;
euid |= egid << 16;
#endif
tainting |= (uid && (euid != uid || egid != gid));
}
static void
init_debugger()
{
curstash = debstash;
dbargs = GvAV(gv_AVadd((gv_fetchpv("args", GV_ADDMULTI, SVt_PVAV))));
AvREAL_off(dbargs);
DBgv = gv_fetchpv("DB", GV_ADDMULTI, SVt_PVGV);
DBline = gv_fetchpv("dbline", GV_ADDMULTI, SVt_PVAV);
DBsub = gv_HVadd(gv_fetchpv("sub", GV_ADDMULTI, SVt_PVHV));
DBsingle = GvSV((gv_fetchpv("single", GV_ADDMULTI, SVt_PV)));
sv_setiv(DBsingle, 0);
DBtrace = GvSV((gv_fetchpv("trace", GV_ADDMULTI, SVt_PV)));
sv_setiv(DBtrace, 0);
DBsignal = GvSV((gv_fetchpv("signal", GV_ADDMULTI, SVt_PV)));
sv_setiv(DBsignal, 0);
curstash = defstash;
}
static void
init_stacks()
{
curstack = newAV();
mainstack = curstack; /* remember in case we switch stacks */
AvREAL_off(curstack); /* not a real array */
av_extend(curstack,127);
stack_base = AvARRAY(curstack);
stack_sp = stack_base;
stack_max = stack_base + 127;
/* Shouldn't these stacks be per-interpreter? */
if (markstack) {
markstack_ptr = markstack;
} else {
New(54,markstack,64,I32);
markstack_ptr = markstack;
markstack_max = markstack + 64;
}
if (scopestack) {
scopestack_ix = 0;
} else {
New(54,scopestack,32,I32);
scopestack_ix = 0;
scopestack_max = 32;
}
if (savestack) {
savestack_ix = 0;
} else {
New(54,savestack,128,ANY);
savestack_ix = 0;
savestack_max = 128;
}
if (retstack) {
retstack_ix = 0;
} else {
New(54,retstack,16,OP*);
retstack_ix = 0;
retstack_max = 16;
}
cxstack_max = 8192 / sizeof(CONTEXT) - 2; /* Use most of 8K. */
New(50,cxstack,cxstack_max + 1,CONTEXT);
cxstack_ix = -1;
New(50,tmps_stack,128,SV*);
tmps_ix = -1;
tmps_max = 128;
DEBUG( {
New(51,debname,128,char);
New(52,debdelim,128,char);
} )
}
static void
nuke_stacks()
{
Safefree(cxstack);
Safefree(tmps_stack);
}
static PerlIO *tmpfp; /* moved outside init_lexer() because of UNICOS bug */
static void
init_lexer()
{
tmpfp = rsfp;
lex_start(linestr);
rsfp = tmpfp;
subname = newSVpv("main",4);
}
static void
init_predump_symbols()
{
GV *tmpgv;
GV *othergv;
sv_setpvn(GvSV(gv_fetchpv("\"", TRUE, SVt_PV)), " ", 1);
stdingv = gv_fetchpv("STDIN",TRUE, SVt_PVIO);
GvMULTI_on(stdingv);
IoIFP(GvIOp(stdingv)) = PerlIO_stdin();
tmpgv = gv_fetchpv("stdin",TRUE, SVt_PV);
GvMULTI_on(tmpgv);
GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(stdingv));
tmpgv = gv_fetchpv("STDOUT",TRUE, SVt_PVIO);
GvMULTI_on(tmpgv);
IoOFP(GvIOp(tmpgv)) = IoIFP(GvIOp(tmpgv)) = PerlIO_stdout();
setdefout(tmpgv);
tmpgv = gv_fetchpv("stdout",TRUE, SVt_PV);
GvMULTI_on(tmpgv);
GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(defoutgv));
othergv = gv_fetchpv("STDERR",TRUE, SVt_PVIO);
GvMULTI_on(othergv);
IoOFP(GvIOp(othergv)) = IoIFP(GvIOp(othergv)) = PerlIO_stderr();
tmpgv = gv_fetchpv("stderr",TRUE, SVt_PV);
GvMULTI_on(tmpgv);
GvIOp(tmpgv) = (IO*)SvREFCNT_inc(GvIOp(othergv));
statname = NEWSV(66,0); /* last filename we did stat on */
if (!osname)
osname = savepv(OSNAME);
}
static void
init_postdump_symbols(argc,argv,env)
register int argc;
register char **argv;
register char **env;
{
char *s;
SV *sv;
GV* tmpgv;
argc--,argv++; /* skip name of script */
if (doswitches) {
for (; argc > 0 && **argv == '-'; argc--,argv++) {
if (!argv[0][1])
break;
if (argv[0][1] == '-') {
argc--,argv++;
break;
}
if (s = strchr(argv[0], '=')) {
*s++ = '\0';
sv_setpv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),s);
}
else
sv_setiv(GvSV(gv_fetchpv(argv[0]+1,TRUE, SVt_PV)),1);
}
}
toptarget = NEWSV(0,0);
sv_upgrade(toptarget, SVt_PVFM);
sv_setpvn(toptarget, "", 0);
bodytarget = NEWSV(0,0);
sv_upgrade(bodytarget, SVt_PVFM);
sv_setpvn(bodytarget, "", 0);
formtarget = bodytarget;
tainted = 1;
if (tmpgv = gv_fetchpv("0",TRUE, SVt_PV)) {
sv_setpv(GvSV(tmpgv),origfilename);
magicname("0", "0", 1);
}
if (tmpgv = gv_fetchpv("\024",TRUE, SVt_PV))
time(&basetime);
if (tmpgv = gv_fetchpv("\030",TRUE, SVt_PV))
sv_setpv(GvSV(tmpgv),origargv[0]);
if (argvgv = gv_fetchpv("ARGV",TRUE, SVt_PVAV)) {
GvMULTI_on(argvgv);
(void)gv_AVadd(argvgv);
av_clear(GvAVn(argvgv));
for (; argc > 0; argc--,argv++) {
av_push(GvAVn(argvgv),newSVpv(argv[0],0));
}
}
if (envgv = gv_fetchpv("ENV",TRUE, SVt_PVHV)) {
HV *hv;
GvMULTI_on(envgv);
hv = GvHVn(envgv);
hv_clear(hv);
#ifndef VMS /* VMS doesn't have environ array */
/* Note that if the supplied env parameter is actually a copy
of the global environ then it may now point to free'd memory
if the environment has been modified since. To avoid this
problem we treat env==NULL as meaning 'use the default'
*/
if (!env)
env = environ;
if (env != environ) {
environ[0] = Nullch;
hv_magic(hv, envgv, 'E');
}
for (; *env; env++) {
if (!(s = strchr(*env,'=')))
continue;
*s++ = '\0';
sv = newSVpv(s--,0);
sv_magic(sv, sv, 'e', *env, s - *env);
(void)hv_store(hv, *env, s - *env, sv, 0);
*s = '=';
}
#endif
#ifdef DYNAMIC_ENV_FETCH
HvNAME(hv) = savepv(ENV_HV_NAME);
#endif
hv_magic(hv, envgv, 'E');
}
tainted = 0;
if (tmpgv = gv_fetchpv("$",TRUE, SVt_PV))
sv_setiv(GvSV(tmpgv),(I32)getpid());
}
static void
init_perllib()
{
char *s;
if (!tainting) {
#ifndef VMS
s = getenv("PERL5LIB");
if (s)
incpush(s);
else
incpush(getenv("PERLLIB"));
#else /* VMS */
/* Treat PERL5?LIB as a possible search list logical name -- the
* "natural" VMS idiom for a Unix path string. We allow each
* element to be a set of |-separated directories for compatibility.
*/
char buf[256];
int idx = 0;
if (my_trnlnm("PERL5LIB",buf,0))
do { incpush(buf); } while (my_trnlnm("PERL5LIB",buf,++idx));
else
while (my_trnlnm("PERLLIB",buf,idx++)) incpush(buf);
#endif /* VMS */
}
/* Use the ~-expanded versions of APPLIB (undocumented),
ARCHLIB PRIVLIB SITEARCH SITELIB and OLDARCHLIB
*/
#ifdef APPLLIB_EXP
incpush(APPLLIB_EXP);
#endif
#ifdef ARCHLIB_EXP
incpush(ARCHLIB_EXP);
#endif
#ifndef PRIVLIB_EXP
#define PRIVLIB_EXP "/usr/local/lib/perl5:/usr/local/lib/perl"
#endif
incpush(PRIVLIB_EXP);
#ifdef SITEARCH_EXP
incpush(SITEARCH_EXP);
#endif
#ifdef SITELIB_EXP
incpush(SITELIB_EXP);
#endif
#ifdef OLDARCHLIB_EXP /* 5.00[01] compatibility */
incpush(OLDARCHLIB_EXP);
#endif
if (!tainting)
incpush(".");
}
void
calllist(list)
AV* list;
{
Sigjmp_buf oldtop;
STRLEN len;
line_t oldline = curcop->cop_line;
Copy(top_env, oldtop, 1, Sigjmp_buf);
while (AvFILL(list) >= 0) {
CV *cv = (CV*)av_shift(list);
SAVEFREESV(cv);
switch (Sigsetjmp(top_env,1)) {
case 0: {
SV* atsv = GvSV(errgv);
PUSHMARK(stack_sp);
perl_call_sv((SV*)cv, G_EVAL|G_DISCARD);
(void)SvPV(atsv, len);
if (len) {
Copy(oldtop, top_env, 1, Sigjmp_buf);
curcop = &compiling;
curcop->cop_line = oldline;
if (list == beginav)
sv_catpv(atsv, "BEGIN failed--compilation aborted");
else
sv_catpv(atsv, "END failed--cleanup aborted");
croak("%s", SvPVX(atsv));
}
}
break;
case 1:
#ifdef VMS
statusvalue = 255; /* XXX I don't think we use 1 anymore. */
#else
statusvalue = 1;
#endif
/* FALL THROUGH */
case 2:
/* my_exit() was called */
curstash = defstash;
if (endav)
calllist(endav);
FREETMPS;
Copy(oldtop, top_env, 1, Sigjmp_buf);
curcop = &compiling;
curcop->cop_line = oldline;
if (statusvalue) {
if (list == beginav)
croak("BEGIN failed--compilation aborted");
else
croak("END failed--cleanup aborted");
}
my_exit(statusvalue);
/* NOTREACHED */
return;
case 3:
if (!restartop) {
PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
FREETMPS;
break;
}
Copy(oldtop, top_env, 1, Sigjmp_buf);
curcop = &compiling;
curcop->cop_line = oldline;
Siglongjmp(top_env, 3);
}
}
Copy(oldtop, top_env, 1, Sigjmp_buf);
}