diff options
Diffstat (limited to 'doc/manual')
| -rw-r--r-- | doc/manual/bugs.xml | 12 | ||||
| -rw-r--r-- | doc/manual/nix-store.xml | 2 | ||||
| -rw-r--r-- | doc/manual/troubleshooting.xml | 44 |
3 files changed, 45 insertions, 13 deletions
diff --git a/doc/manual/bugs.xml b/doc/manual/bugs.xml index d21603559ddc..aa87e4b57048 100644 --- a/doc/manual/bugs.xml +++ b/doc/manual/bugs.xml @@ -15,18 +15,6 @@ generation 43 is created which is a descendant of 39, not 42. So a rollback from 43 ought to go back to 39. This is not currently implemented; generations form a linear sequence.</para></listitem> -<listitem><para><emphasis>Build management.</emphasis> In principle it -is already possible to do build management using Nix (by writing -builders that perform appropriate build steps), but the Nix expression -language is not yet powerful enough to make this pleasant (?). The -language should be extended with features from the <link -xlink:href='http://www.cs.uu.nl/~eelco/maak/'>Maak build -manager</link>. Another interesting idea is to write a -<command>make</command> implementation that uses Nix as a back-end to -support <link -xlink:href='http://www.research.att.com/~bs/bs_faq.html#legacy'>legacy</link> -build files.</para></listitem> - <listitem><para>For security, <command>nix-push</command> manifests should be digitally signed, and <command>nix-pull</command> should verify the signatures. The actual NAR archives in the cache do not diff --git a/doc/manual/nix-store.xml b/doc/manual/nix-store.xml index 0a7ecdf0676d..5edc1cdaa2f7 100644 --- a/doc/manual/nix-store.xml +++ b/doc/manual/nix-store.xml @@ -681,7 +681,7 @@ deployment.</para> <!--######################################################################--> -<refsection><title>Operation <option>--verify</option></title> +<refsection xml:id='refsec-nix-store-verify'><title>Operation <option>--verify</option></title> <refsection> <title>Synopsis</title> diff --git a/doc/manual/troubleshooting.xml b/doc/manual/troubleshooting.xml index 9a61205b7334..c0add7fddadc 100644 --- a/doc/manual/troubleshooting.xml +++ b/doc/manual/troubleshooting.xml @@ -33,6 +33,50 @@ $ rm __db.00*</screen> </section> +<section><title>Berkeley DB gives weird error messages</title> + +<para>Symptom: you get error messages such as + +<screen> +Berkeley DB message: Finding last valid log LSN: file: 1 offset 28 +Berkeley DB error: file validpaths (meta pgno = 0) has LSN [483][34721]. +Berkeley DB error: end of log is [1][28] +Berkeley DB error: /nix/var/nix/db/validpaths: unexpected file type or format</screen> + +or other weird Berkeley DB errors, and they don’t away (i.e., +automatic recovery doesn’t work). This may be the case after a system crash.</para> + +<para>Solution: first try to run <command>db_recover</command> and +then <link linkend='refsec-nix-store-verify'><command>nix-store +--verify</command></link>: + +<screen> +$ db_recover -h /nix/var/nix/db +$ nix-store --verify</screen> + +(Make sure that you have the right version of +<command>db_recover</command>, namely, Berkeley DB 4.4 for Nix 0.10, +and 4.5 for Nix 0.11.)</para> + +<para>If that doesn’t work, it’s time to bring out the big guns: + +<screen> +$ cd /nix/var/nix +$ cp -pr db db-backup <lineannotation>(making a backup just in case)</lineannotation> +$ cd db +$ rm __db.* log* <lineannotation>(removing the Berkeley DB environment)</lineannotation> +$ mkdir tmp +$ for i in *; do db_dump $i | (cd tmp && db_load $i); done +<lineannotation>(ignore error messages about non-database files like “reserved”)</lineannotation> +$ mv tmp/* . +$ nix-store --verify</screen> + +</para> + +</section> + + + <section><title>Collisions in <command>nix-env</command></title> <para>Symptom: when installing or upgrading, you get an error message such as |