blob: b0387a56353e43bb6ec3e1f431faecd34a63557c (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
*** 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;
|
