/* taint.c
*
- * Copyright (c) 1997-2002, Larry Wall
+ * Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ * 2000, 2001, 2002, by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
* liar, Saruman, and a corrupter of men's hearts." --Theoden
*/
+/* This file contains a few functions for handling data tainting in Perl
+ */
+
#include "EXTERN.h"
#define PERL_IN_TAINT_C
#include "perl.h"
void
Perl_taint_proper(pTHX_ const char *f, const char *s)
{
- char *ug;
+ const char *ug;
#if defined(HAS_SETEUID) && defined(DEBUGGING)
# if Uid_t_size == 1
ug = " while running with -T switch";
if (PL_unsafe || PL_taint_warn) {
if(ckWARN(WARN_TAINT))
- Perl_warner(aTHX_ WARN_TAINT, f, s, ug);
+ Perl_warner(aTHX_ packWARN(WARN_TAINT), f, s, ug);
}
else {
Perl_croak(aTHX_ f, s, ug);
{
SV** svp;
MAGIC* mg;
- char** e;
- static char* misc_env[] = {
+ const char* const *e;
+ static const char* const misc_env[] = {
"IFS", /* most shells' inter-field separators */
"CDPATH", /* ksh dain bramage #1 */
"ENV", /* ksh dain bramage #2 */
NULL
};
+ /* Don't bother if there's no *ENV glob */
if (!PL_envgv)
return;
+ /* If there's no %ENV hash of if it's not magical, croak, because
+ * it probably doesn't reflect the actual environment */
+ if (!GvHV(PL_envgv) || !(SvRMAGICAL(GvHV(PL_envgv))
+ && mg_find((SV*)GvHV(PL_envgv), PERL_MAGIC_env))) {
+ const bool was_tainted = PL_tainted;
+ const char *name = GvENAME(PL_envgv);
+ PL_tainted = TRUE;
+ if (strEQ(name,"ENV"))
+ /* hash alias */
+ taint_proper("%%ENV is aliased to %s%s", "another variable");
+ else
+ /* glob alias: report it in the error message */
+ taint_proper("%%ENV is aliased to %%%s%s", name);
+ /* this statement is reached under -t or -U */
+ PL_tainted = was_tainted;
+ }
#ifdef VMS
{
/* tainted $TERM is okay if it contains no metachars */
svp = hv_fetch(GvHVn(PL_envgv),"TERM",4,FALSE);
if (svp && *svp && SvTAINTED(*svp)) {
- STRLEN n_a;
- bool was_tainted = PL_tainted;
- char *t = SvPV(*svp, n_a);
- char *e = t + n_a;
+ STRLEN len;
+ const bool was_tainted = PL_tainted;
+ const char *t = SvPV_const(*svp, len);
+ const char *e = t + len;
PL_tainted = was_tainted;
if (t < e && isALNUM(*t))
t++;
- while (t < e && (isALNUM(*t) || *t == '-' || *t == ':'))
+ while (t < e && (isALNUM(*t) || strchr("-_.+", *t)))
t++;
if (t < e) {
TAINT;
}
}
}
+
+/*
+ * Local variables:
+ * c-indentation-style: bsd
+ * c-basic-offset: 4
+ * indent-tabs-mode: t
+ * End:
+ *
+ * ex: set ts=8 sts=4 sw=4 noet:
+ */