Finding a file’s package name offline in Fedora without “yum whatprovides”

One really cool feature of ubuntu is the command-not-found script.  If you try to execute a program, say, nmap — and that dpkg hasn’t been installed, the command-not-found script executes to parse a locally installed database to suggest,  “hey, you should try executing # apt-get install nmap” or something similar.

This really makes ubuntu more user friendly.  Fedora has the ability to use ” # yum whatprovides <>” but yum is going to bomb out if you don’t have a working network connection.  Yum’s first steps are to connect to online repositories to download filelists.sqlite.bz2, primary.sqlite,bz2, etc.

So what are these files?  They are sqlite databases that contain data about what packages are available and the information about those packages…  So lets say we’re looking for some binary called kde4-config, but I don’t have an active network connection…. What package contains that binary?

First, lets find all available instances of filelist.sqlite.  Each fedora RPM repository is going to contain its own copy.

[cylon:/]
<svoboda>locate filelists.sqlite
/var/cache/yum/fedora/filelists.sqlite
/var/cache/yum/livna/filelists.sqlite
/var/cache/yum/updates/filelists.sqlite
/var/cache/yum/updates-newkey/filelists.sqlite

Cool — so there are 4 network repositories here.  Lets mess around with the fedora repository first…

[cylon:/var/cache/yum/fedora]
<svoboda>ls -lh
total 89M
-rw-r–r– 1 root root    0 2008-09-30 10:11 cachecookie
-rw-r–r– 1 root root  58M 2008-09-17 13:46 filelists.sqlite
-rw-r–r– 1 root root 2.0K 2008-09-30 07:19 mirrorlist.txt
drwxr-xr-x 2 root root 4.0K 2008-09-30 10:12 packages
-rw-r–r– 1 root root  32M 2008-09-17 13:35 primary.sqlite
-rw-r–r– 1 root root 2.4K 2008-09-30 10:11 repomd.xml

[cylon:/var/cache/yum/fedora]
<svoboda>file filelists.sqlite primary.sqlite
filelists.sqlite: SQLite 3.x database
primary.sqlite:   SQLite 3.x database

Sure enough, they’re sqlite databases.  Lets issue a select statement on filenames within the filelists.sqlite database and look for the kde4-config binary.  First, lets take a peek at what we have available….

[cylon:/var/cache/yum/fedora]
<svoboda>sqlite3 filelists.sqlite
SQLite version 3.5.9
Enter “.help” for instructions

Before we get too deep, lets turn headers on and the output to column mode so things are a bit more readable…

sqlite> .headers on
sqlite> .mode column

Next, lets see what tables we have available…

sqlite> .tables
db_info   filelist  packages

Filelist looks interesting.  What does it contain?

sqlite> .schema filelist
CREATE TABLE filelist (  pkgKey INTEGER,  dirname TEXT,  filenames TEXT,  filetypes TEXT);
CREATE INDEX dirnames ON filelist (dirname);
CREATE INDEX keyfile ON filelist (pkgKey);

sqlite> pragma table_info (filelist);
0|pkgKey|INTEGER|0||0
1|dirname|TEXT|0||0
2|filenames|TEXT|0||0
3|filetypes|TEXT|0||0
sqlite>

Cool.  So lets extract the pkgKey and filenames column for any entries that contain the phrase “kde4-config” anywhere in the path…

sqlite> SELECT pkgKey,filenames FROM filelist
…> WHERE filenames LIKE ‘%kde4-config%’;
pkgKey      filenames
———-  ———————————————————————————————
3703        preparetips/nepomuk-rcgen/meinproc4/kwrapper4/kunittestmodrunner/kshell4/kross/kjsconsole/kjscmd/kjs/kdeinit4_wrapper/kdeinit4_shutdown/kdeinit4/kded4/kde4automoc/kde4-doxygen.sh/kde4-config/kcookiejar4/kbuildsycoca4/checkXML
3703        kde4-config.1.gz/checkXML.1.gz
10746       preparetips/nepomuk-rcgen/meinproc4/kwrapper4/kunittestmodrunner/kshell4/kross/kjsconsole/kjscmd/kjs/kdeinit4_wrapper/kdeinit4_shutdown/kdeinit4/kded4/kde4automoc/kde4-doxygen.sh/kde4-config/kcookiejar4/kbuildsycoca4/checkXML
10746       kde4-config.1.gz/checkXML.1.gz

Awesome!  We found something.  It looks like we matched two packages — package 3703 and package 10746.  Now, we just need to figure out what those packages are…  Lets go peek in the second sqlite database file, primary.sqlite.

[cylon:/var/cache/yum/fedora]
<svoboda>sqlite3 primary.sqlite
SQLite version 3.5.9
Enter “.help” for instructions
sqlite> .header on
sqlite> .mode column
sqlite> .tables
conflicts  db_info    files      obsoletes  packages   provides   requires
sqlite>

What does the packages table look like?

sqlite> pragma table_info (packages);
cid         name        type        notnull     dflt_value  pk
———-  ———-  ———-  ———-  ———-  ———-
0           pkgKey      INTEGER     0                       1
1           pkgId       TEXT        0                       0
2           name        TEXT        0                       0
3           arch        TEXT        0                       0
4           version     TEXT        0                       0
5           epoch       TEXT        0                       0
6           release     TEXT        0                       0
7           summary     TEXT        0                       0
8           descriptio  TEXT        0                       0
9           url         TEXT        0                       0
10          time_file   INTEGER     0                       0
11          time_build  INTEGER     0                       0
12          rpm_licens  TEXT        0                       0
13          rpm_vendor  TEXT        0                       0
14          rpm_group   TEXT        0                       0
15          rpm_buildh  TEXT        0                       0
16          rpm_source  TEXT        0                       0
17          rpm_header  INTEGER     0                       0
18          rpm_header  INTEGER     0                       0
19          rpm_packag  TEXT        0                       0
20          size_packa  INTEGER     0                       0
21          size_insta  INTEGER     0                       0
22          size_archi  INTEGER     0                       0
23          location_h  TEXT        0                       0
24          location_b  TEXT        0                       0
25          checksum_t  TEXT        0                       0
Cool.  We want to match the name of the package that has the pkgKey entries 3703 or 10746.  Lets adjust our width so we don’t get truncated values displayed to the screen…

sqlite> .width 10 50

And query aganist that pkgKey value.

sqlite> SELECT name,location_href FROM packages
…> WHERE pkgKey = 3703;
name        location_href
———-  ————————————————–
kdelibs     Packages/kdelibs-4.0.3-7.fc9.i386.rpm

sqlite> SELECT name,location_href FROM packages
…> WHERE pkgKey = 10746;
name        location_href
———-  ————————————————–
kdelibs     Packages/kdelibs-4.0.3-7.fc9.x86_64.rpm

1 thought on “Finding a file’s package name offline in Fedora without “yum whatprovides””

  1. Nice spell!

    FYI, though not that geeky, one can use:

    yum -C whatprovides ‘*kde4-config*’

    -C will ask yum to use only the cache if possible.

    Cheers,
    Marian

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