This patch originates from the Debian project, see https://www.debian.org/

18dbpagesize_binpower.dpatch by  <hesso@pool.math.tu-berlin.de>


Make sure that the pagesize passed to db__set_pagesize() is a power of two.

nvi stores the content of files in BDB database structures. When initiating a
file, it picks a page size for the database to fit the file within 15 pages,
with a minimal page size of 1K and maximal of 10K.

In vanilla nvi, this size is calculated as a multiple of 1024. Modern versions
of BDB, however, require the page size of a database to be a power of two, which
this patch addresses, ridding us of the following message:

  BDB0511 page sizes must be a power-of-2

--- nvi-1.81.6.orig/common/exf.c	2009-03-09 01:48:01.695862889 +0100
+++ nvi-1.81.6/common/exf.c	2009-03-09 10:42:41.147866272 +0100
@@ -249,11 +249,10 @@
 		 * (vi should have good locality) or smaller than 1K.
 		 */
 		psize = ((sb.st_size / 15) + 1023) / 1024;
-		if (psize > 10)
-			psize = 10;
-		if (psize == 0)
-			psize = 1;
-		psize *= 1024;
+		if (psize >= 8) psize=8<<10;
+		else if (psize >= 4) psize=4<<10;
+		else if (psize >= 2) psize=2<<10;
+		else psize=1<<10;
 
 		F_SET(ep, F_DEVSET);
 		ep->mdev = sb.st_dev;
f='/guix/tree/tests/guix-graph.sh?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>tree</a><a href='/guix/commit/tests/guix-graph.sh?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>commit</a><a href='/guix/diff/tests/guix-graph.sh?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/tests/guix-graph.sh'>
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<div class='path'>path: <a href='/guix/log/?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>root</a>/<a href='/guix/log/tests?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>tests</a>/<a href='/guix/log/tests/guix-graph.sh?id=826654708c9ab94dcad191522b9b86d5c82a08f5'>guix-graph.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-graph.sh?id=826654708c9ab94dcad191522b9b86d5c82a08f5&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-09-26 17:36:57 +0200'>2023-09-26</span></td><td><a href='/guix/commit/tests/guix-graph.sh?id=7f3ebd6dbcae830e60b78d6bab8f1dbad90ba3a8'>tests: Adjust ‘guix graph --path’ test to latest Emacs changes.</a><span class='msg-avail'>...<span class='msg-tooltip'>This is a followup to 3349a50d700a2112a31ac4ce6cc6639d3b4cf1e2.

* tests/guix-graph.sh: Adjust ‘path’.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-04-28 19:50:39 +0200'>2023-04-28</span></td><td><a href='/guix/commit/tests/guix-graph.sh?id=ee88acc6e22595bbf4a6f07332ed4308d6a6e3cf'>tests: guix-graph.sh: Fix expected path from emacs to libffi.</a><span class='msg-avail'>...<span class='msg-tooltip'>* tests/guix-graph.sh: Change the expected path from emacs to libffi.  `guix
graph --path` outputs only one possible path, and the one it outputs for this
case has changed.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2023-04-21 16:16:38 +0200'>2023-04-21</span></td><td><a href='/guix/commit/tests/guix-graph.sh?id=37dd69b44511dc73eb04bdebe8d82c9a0386338e'>tests: Fix checks for expected failures.</a><span class='msg-avail'>...<span class='msg-tooltip'>Addresses &lt;https://issues.guix.gnu.org/62406&gt;.

With 'set -e', a return status inverted with '!' does not cause the shell to
exit immediately.  Instead use '&amp;&amp; false' to indicate an expected failure.

* tests/guix-archive.sh, tests/guix-build-branch.sh, tests/guix-build.sh,
tests/guix-daemon.sh, tests/guix-download.sh,
tests/guix-environment-container.sh, tests/guix-environment.sh,
tests/guix-gc.sh, tests/guix-git-authenticate.sh, tests/guix-graph.sh,
tests/guix-hash.sh, tests/guix-home.sh, tests/guix-pack-relocatable.sh,
tests/guix-pack.sh, tests/guix-package-aliases.sh, tests/guix-package-net.sh,
tests/guix-package.sh, tests/guix-refresh.sh, tests/guix-shell.sh,
tests/guix-style.sh, tests/guix-system.sh: Replace uses of '! ...' with
'... &amp;&amp; false' or `test ! ...` as appropriate.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Eric Bavier</td></tr>