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;
e.scm?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>tree</a><a href='/guix/commit/gnu/home.scm?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>commit</a><a href='/guix/diff/gnu/home.scm?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>diff</a></td><td class='form'><form class='right' method='get' action='/guix/log/gnu/home.scm'>
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<div class='path'>path: <a href='/guix/log/?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>root</a>/<a href='/guix/log/gnu?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>gnu</a>/<a href='/guix/log/gnu/home.scm?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8'>home.scm</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/gnu/home.scm?id=00dfba9d7518d9a9900adeb553b6a2231454cbe8&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-03-22 11:40:33 +0100'>2024-03-22</span></td><td><a href='/guix/commit/gnu/home.scm?id=29de2edfbbed21ac016f73a45d399795fc2e4dfb'>system, home: Validate ‘services’ field value.</a><span class='msg-avail'>...<span class='msg-tooltip'>This guides newcomers who might stick a single (service …) form
in this field.

* gnu/services.scm (validate-service-list): New macro.
(%validate-service-list): New procedure.
* gnu/system.scm (&lt;operating-system&gt;)[services]: Add ‘sanitize’.
* gnu/home.scm (&lt;home-environment&gt;)[services]: Add ‘sanitize’.

Change-Id: I9e29bd9a078e87b627ab766fd669ba9de79f8473
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-03-20 09:14:23 +0400'>2023-03-20</span></td><td><a href='/guix/commit/gnu/home.scm?id=1f36534c7e8f2325bff4df5d37ecc811dc63fc38'>home: 'home-environment-with-provenance' uses the HE location info.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home.scm (home-environment-with-provenance): Make `config-file`
optional, with the default taken from the HE location info.

Signed-off-by: Andrew Tropin &lt;andrew@trop.in&gt;
</span></span></td><td>Sergey Trofimov</td></tr>
<tr><td><span title='2023-03-13 16:41:34 +0400'>2023-03-13</span></td><td><a href='/guix/commit/gnu/home.scm?id=377c8143e7cd5e3bf3e1e8d53ba443f91c88239c'>home: Export home-environment-packages.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/home.scm (home-environment-packages): Export procedure.

Signed-off-by: Andrew Tropin &lt;andrew@trop.in&gt;
</span></span></td><td>Sergey Trofimov</td></tr>