PL_origargc = argc;
PL_origargv = argv;
+ {
+ /* Set PL_origalen be the sum of the contiguous argv[]
+ * elements plus the size of the env in case that it is
+ * contiguous with the argv[]. This is used in mg.c:mg_set()
+ * as the maximum modifiable length of $0. In the worst case
+ * the area we are able to modify is limited to the size of
+ * the original argv[0]. (See below for 'contiguous', though.)
+ * --jhi */
+ char *s;
+ int i;
+ UV mask =
+ ~(UV)(PTRSIZE == 4 ? 3 : PTRSIZE == 8 ? 7 : PTRSIZE == 16 ? 15 : 0);
+ /* Do the mask check only if the args seem like aligned. */
+ UV aligned =
+ (mask < ~(UV)0) && ((PTR2UV(argv[0]) & mask) == PTR2UV(argv[0]));
+
+ /* See if all the arguments are contiguous in memory. Note
+ * that 'contiguous' is a loose term because some platforms
+ * align the argv[] and the envp[]. If the arguments look
+ * like non-aligned, assume that they are 'strictly' or
+ * 'traditionally' contiguous. If the arguments look like
+ * aligned, we just check that they are within aligned
+ * PTRSIZE bytes. As long as no system has something bizarre
+ * like the argv[] interleaved with some other data, we are
+ * fine. (Did I just evoke Murphy's Law?) --jhi */
+ s = PL_origargv[0];
+ while (*s) s++;
+ for (i = 1; i < PL_origargc; i++) {
+ if ((PL_origargv[i] == s + 1
+#ifdef OS2
+ || PL_origargv[i] == s + 2
+#endif
+ )
+ ||
+ (aligned &&
+ (PL_origargv[i] > s &&
+ PL_origargv[i] <=
+ INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
+ )
+ {
+ s = PL_origargv[i];
+ while (*s) s++;
+ }
+ else
+ break;
+ }
+ /* Can we grab env area too to be used as the area for $0? */
+ if (PL_origenviron) {
+ if ((PL_origenviron[0] == s + 1
+#ifdef OS2
+ || (PL_origenviron[0] == s + 9 && (s += 8))
+#endif
+ )
+ ||
+ (aligned &&
+ (PL_origenviron[0] > s &&
+ PL_origenviron[0] <=
+ INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
+ )
+ {
+#ifndef OS2
+ s = PL_origenviron[0];
+ while (*s) s++;
+#endif
+ my_setenv("NoNe SuCh", Nullch);
+ /* Force copy of environment. */
+ for (i = 1; PL_origenviron[i]; i++) {
+ if (PL_origenviron[i] == s + 1
+ ||
+ (aligned &&
+ (PL_origenviron[i] > s &&
+ PL_origenviron[i] <=
+ INT2PTR(char *, PTR2UV(s + PTRSIZE) & mask)))
+ )
+ {
+ s = PL_origenviron[i];
+ while (*s) s++;
+ }
+ else
+ break;
+ }
+ }
+ }
+ PL_origalen = s - PL_origargv[0];
+ }
+
if (PL_do_undump) {
/* Come here if running an undumped a.out. */
PerlIO_printf(PerlIO_stdout(), "\n %s", *p++);
}
+/* convert a string of -D options (or digits) into an int.
+ * sets *s to point to the char after the options */
+
+#ifdef DEBUGGING
+int
+Perl_get_debug_opts(pTHX_ char **s)
+{
+ int i = 0;
+ if (isALPHA(**s)) {
+ /* if adding extra options, remember to update DEBUG_MASK */
+ static char debopts[] = "psltocPmfrxu HXDSTRJvC";
+
+ for (; isALNUM(**s); (*s)++) {
+ char *d = strchr(debopts,**s);
+ if (d)
+ i |= 1 << (d - debopts);
+ else if (ckWARN_d(WARN_DEBUGGING))
+ Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
+ "invalid option -D%c\n", **s);
+ }
+ }
+ else {
+ i = atoi(*s);
+ for (; isALNUM(**s); (*s)++) ;
+ }
+# ifdef EBCDIC
+ if ((i & DEBUG_p_FLAG) && ckWARN_d(WARN_DEBUGGING))
+ Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
+ "-Dp not implemented on this platform\n");
+# endif
+ return i;
+}
+#endif
+
/* This routine handles any switches that can be given during run */
char *
{
#ifdef DEBUGGING
forbid_setid("-D");
- if (isALPHA(s[1])) {
- /* if adding extra options, remember to update DEBUG_MASK */
- static char debopts[] = "psltocPmfrxu HXDSTRJvC";
- char *d;
-
- for (s++; *s && (d = strchr(debopts,*s)); s++)
- PL_debug |= 1 << (d - debopts);
- }
- else {
- PL_debug = atoi(s+1);
- for (s++; isDIGIT(*s); s++) ;
- }
-#ifdef EBCDIC
- if (DEBUG_p_TEST_ && ckWARN_d(WARN_DEBUGGING))
- Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
- "-Dp not implemented on this platform\n");
-#endif
- PL_debug |= DEBUG_TOP_FLAG;
+ s++;
+ PL_debug = get_debug_opts(&s) | DEBUG_TOP_FLAG;
#else /* !DEBUGGING */
if (ckWARN_d(WARN_DEBUGGING))
Perl_warner(aTHX_ packWARN(WARN_DEBUGGING),
bool
Perl_doing_taint(int argc, char *argv[], char *envp[])
{
- dTHX;
+#ifndef PERL_IMPLICIT_SYS
+ /* If we have PERL_IMPLICIT_SYS we can't call getuid() et alia
+ * before we have an interpreter-- and the whole point of this
+ * function is to be called at such an early stage. If you are on
+ * a system with PERL_IMPLICIT_SYS but you do have a concept of
+ * "tainted because running with altered effective ids', you'll
+ * have to add your own checks somewhere in here. The two most
+ * known samples of 'implicitness' are Win32 and NetWare, neither
+ * of which has much of concept of 'uids'. */
int uid = PerlProc_getuid();
int euid = PerlProc_geteuid();
int gid = PerlProc_getgid();
#endif
if (uid && (euid != uid || egid != gid))
return 1;
+#endif /* !PERL_IMPLICIT_SYS */
/* This is a really primitive check; environment gets ignored only
* if -T are the first chars together; otherwise one gets
* "Too late" message. */
projects / p5sagit/p5-mst-13.2.git / blobdiff