Make PerlIO_getpos() to behave like fgetpos() on return.

[p5sagit/p5-mst-13.2.git] / perlio.c

diff --git a/perlio.c b/perlio.c
index 0da8813..8d54f77 100644 (file)
--- a/perlio.c
+++ b/perlio.c
@@ -385,7 +385,7 @@ PerlIO_default_layer(I32 n)
            av_push(PerlIO_layer_av,SvREFCNT_inc(layer));
           }
          else
-          Perl_warn(aTHX_ "Unknown layer %.*s",(e-s),s);
+          Perl_warn(aTHX_ "perlio: unknown layer \"%.*s\"",(e-s),s);
          s = e;
         }
       }
@@ -1823,6 +1823,7 @@ static size_t page_size = 0;
 IV
 PerlIOMmap_map(PerlIO *f)
 {
+ dTHX;
  PerlIOMmap *m = PerlIOSelf(f,PerlIOMmap);
  PerlIOBuf  *b = &m->base;
  IV flags = PerlIOBase(f)->flags;
@@ -1841,8 +1842,40 @@ PerlIOMmap_map(PerlIO *f)
      if (len > 0)
       {
        Off_t posn;
-       if (!page_size)
+       if (!page_size) {
+#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_PAGE_SIZE))
+          {
+              SETERRNO(0,SS$_NORMAL);
+#   ifdef _SC_PAGESIZE
+              page_size = sysconf(_SC_PAGESIZE);
+#   else
+              page_size = sysconf(_SC_PAGE_SIZE);
+#   endif
+              if ((long)page_size < 0) {
+                  if (errno) {
+                      SV *error = ERRSV;
+                      char *msg;
+                      STRLEN n_a;
+                      (void)SvUPGRADE(error, SVt_PV);
+                      msg = SvPVx(error, n_a);
+                      Perl_croak(aTHX_ "panic: sysconf: %s", msg);
+                  }
+                  else
+                      Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
+              }
+          }
+#else
+#   ifdef HAS_GETPAGESIZE
         page_size = getpagesize();
+#   else
+#       if defined(I_SYS_PARAM) && defined(PAGESIZE)
+        page_size = PAGESIZE; /* compiletime, bad */
+#       endif
+#   endif
+#endif
+       if ((IV)page_size <= 0)
+           Perl_croak(aTHX_ "panic: bad pagesize %"IVdf, (IV)page_size);
+       }
        if (b->posn < 0)
         {
          /* This is a hack - should never happen - open should have set it ! */
@@ -2281,7 +2314,7 @@ int
 PerlIO_getpos(PerlIO *f, Fpos_t *pos)
 {
  *pos = PerlIO_tell(f);
- return 0;
+ return *pos == -1 ? -1 : 0;
 }
 #else
 #ifndef PERLIO_IS_STDIO
@@ -2326,7 +2359,8 @@ PerlIO_vsprintf(char *s, int n, const char *fmt, va_list ap)
    if (strlen(s) >= (STRLEN)n)
     {
      dTHX;
-     PerlIO_puts(Perl_error_log,"panic: sprintf overflow - memory corrupted!\n");
+     (void)PerlIO_puts(Perl_error_log,
+                      "panic: sprintf overflow - memory corrupted!\n");
      my_exit(1);
     }
   }