30 lines
883 B
Plaintext
30 lines
883 B
Plaintext
*** PORT/db/recno/rec_open.c.orig 1993/10/13 02:01:31
|
|
--- PORT/db/recno/rec_open.c 1993/10/13 02:20:47
|
|
***************
|
|
*** 159,167 ****
|
|
--- 159,182 ----
|
|
SET(t, R_EOF);
|
|
else {
|
|
t->bt_msize = sb.st_size;
|
|
+ /*
|
|
+ * hack :
|
|
+ *
|
|
+ * The Linux kernel mmap() semantics are broken :
|
|
+ *
|
|
+ * Under Linux, read only private mappings cause write only and read/write
|
|
+ * opens to fail with errno=ETXTBSY. Shared read only mappings should work
|
|
+ * fine though, but I'm not familiar enough with the code to ascertain that
|
|
+ * a MAP_SHARED mapping would be safe so I use the non-mmap'd version
|
|
+ * instead.
|
|
+ *
|
|
+ */
|
|
+
|
|
+ #if !defined(linux)
|
|
if ((t->bt_smap = mmap(NULL, t->bt_msize,
|
|
PROT_READ, MAP_PRIVATE, rfd,
|
|
(off_t)0)) == (caddr_t)-1)
|
|
+ #endif
|
|
goto slow;
|
|
t->bt_cmap = t->bt_smap;
|
|
t->bt_emap = t->bt_smap + sb.st_size;
|