aboutsummaryrefslogtreecommitdiff
path: root/src/gdbmconst.h
diff options
context:
space:
mode:
authorSergey Poznyakoff <gray@gnu.org.ua>2016-07-15 14:46:08 +0300
committerSergey Poznyakoff <gray@gnu.org.ua>2016-07-15 14:57:40 +0300
commit44ca2b760b393e993b2a42fc489fa170910ad810 (patch)
tree12aa7390b19bed8aba2535cedb04376c45f820a5 /src/gdbmconst.h
parent5580c3248794803a8e45dd58b45933a32637954d (diff)
downloadgdbm-44ca2b760b393e993b2a42fc489fa170910ad810.tar.gz
gdbm-44ca2b760b393e993b2a42fc489fa170910ad810.tar.bz2
gdbm_open adjusts requested block size to accomodate integer number of directory offsets.
* src/gdbm.h.in (GDBM_BSEXACT): New flag. * src/gdbmopen.c (compute_directory_size): New function. (gdbm_open): When creating new database, adjust the requested block size so that the block holds integer number of directory indices. Disable this behavior if GDBM_BSEXACT flag is set (this reverts to old behavior). Always unset GDBM_BSEXACT if using block size returned by stat(2). This makes sure gdbm_open succeeds on file systems reporting block sizes not divisible by 512. * src/gdbmconst.h (GDBM_MIN_BLOCK_SIZE): New constant. * src/gdbmimp.c (gdbm_import_from_file): Use GDBM_MIN_BLOCK_SIZE instead of the hardcoded value. * NEWS: Document GDBM_BSEXACT. * doc/gdbm.texi: Likewise.
Diffstat (limited to 'src/gdbmconst.h')
-rw-r--r--src/gdbmconst.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/gdbmconst.h b/src/gdbmconst.h
index 56820db..66b0fb2 100644
--- a/src/gdbmconst.h
+++ b/src/gdbmconst.h
@@ -38,6 +38,9 @@
/* Size of a hash value, in bits */
#define GDBM_HASH_BITS 31
+/* Minimal acceptable block size */
+#define GDBM_MIN_BLOCK_SIZE 512
+
/* In freeing blocks, we will ignore any blocks smaller (and equal) to
IGNORE_SIZE number of bytes. */
#define IGNORE_SIZE 4

Return to:

Send suggestions and report system problems to the System administrator.