Installing PEAR package under ubuntu

[JDP91]

Hi,
trying to install a package ($ pear install --alldeps structures_datagrid-0.9.0)
I 1st got :
download directory "/build/buildd/php5-5.2.10.dfsg.1/pear-build-download" is not writeable. Change download_dir config variable to a writeable dir. Change download_dir config variable to a writeable dir
I then modified /etc/pear/pear.conf (in bold):
===================================
#PEAR_Config 0.9
a:31:{s:9:"cache_dir";s:15:"/tmp/pear/cache";s:15:"default_channel";s:12:"pear.php.net";s:16:"preferred_mirror";s:12:"pear.php.net";s:13:"remote_config";s:0:"";s:13:"auto_discover";i:0;s:13:"master_server";s:12:"pear.php.net";s:10:"http_proxy";s:0:"";s:7:"php_dir";s:14:"/usr/share/php";s:7:"ext_dir";s:26:"/usr/lib/php5/20060613+lfs";s:7:"doc_dir";s:18:"/usr/share/php/doc";s:7:"bin_dir";s:8:"/usr/bin";s:8:"data_dir";s:19:"/usr/share/php/data";s:7:"cfg_dir";s:18:"/usr/share/php/cfg";s:7:"www_dir";s:21:"/usr/share/php/htdocs";s:8:"test_dir";s:19:"/usr/share/php/test";s:8:"temp_dir";s:14:"/tmp/pear/temp";s:12:"download_dir";s:52:"/build/buildd/php5-5.2.10.dfsg.1/pear-build-download";s:7:"php_bin";s:12:"/usr/bin/php";s:10:"php_prefix";s:0:"";s:10:"php_suffix";s:0:"";s:7:"php_ini";s:0:"";s:8:"username";s:0:"";s:8:"password";s:0:"";s:7:"verbose";i:1;s:15:"preferred_state";s:6:"stable";s:5:"umask";i:18;s:9:"cache_ttl";i:3600;s:8:"sig_type";s:3:"gpg";s:7:"sig_bin";s:12:"/usr/bin/gpg";s:9:"sig_keyid";s:0:"";s:10:"sig_keydir";s:18:"/etc/pear/pearkeys";}
==============================================================
to /etc/pear/pear.conf as folllows (in bold)
==============================================================
#PEAR_Config 0.9
a:31:{s:9:"cache_dir";s:15:"/tmp/pear/cache";s:15:"default_channel";s:12:"pear.php.net";s:16:"preferred_mirror";s:12:"pear.php.net";s:13:"remote_config";s:0:"";s:13:"auto_discover";i:0;s:13:"master_server";s:12:"pear.php.net";s:10:"http_proxy";s:0:"";s:7:"php_dir";s:14:"/usr/share/php";s:7:"ext_dir";s:26:"/usr/lib/php5/20060613+lfs";s:7:"doc_dir";s:18:"/usr/share/php/doc";s:7:"bin_dir";s:8:"/usr/bin";s:8:"data_dir";s:19:"/usr/share/php/data";s:7:"cfg_dir";s:18:"/usr/share/php/cfg";s:7:"www_dir";s:21:"/usr/share/php/htdocs";s:8:"test_dir";s:19:"/usr/share/php/test";s:8:"temp_dir";s:14:"/tmp/pear/temp";s:12:"download_dir";s:26:"/home/xxxx/Téléchargements";s:7:"php_bin";s:12:"/usr/bin/php";s:10:"php_prefix";s:0:"";s:10:"php_suffix";s:0:"";s:7:"php_ini";s:0:"";s:8:"username";s:0:"";s:8:"password";s:0:"";s:7:"verbose";i:1;s:15:"preferred_state";s:6:"stable";s:5:"umask";i:18;s:9:"cache_ttl";i:3600;s:8:"sig_type";s:3:"gpg";s:7:"sig_bin";s:12:"/usr/bin/gpg";s:9:"sig_keyid";s:0:"";s:10:"sig_keydir";s:18:"/etc/pear/pearkeys";}
===============================================
anf now I get:
Error at offset 661 of 1035 bytes in Config.php on line 1050
ERROR: The default config file is not a valid config file or is corrupted.

Where is my mistake ?

[Fox_Van]

usuario@equipo:~/$ pear install Log-1.12.0RC1
WARNING: configuration download directory "/build/buildd/php5-5.2.10.dfsg.1/pear-build-download" is not writeable. Change download_dir config variable to a writeable dir to avoid this warning
Cannot install, php_dir for channel "pear.php.net" is not writeable by the current user
usuario@equipo:~/$
usuario@equipo:~/$ pear install Log-1.12.0RC1
WARNING: configuration download directory "/build/buildd/php5-5.2.10.dfsg.1/pear-build-download" is not writeable. Change download_dir config variable to a writeable dir to avoid this warning
Cannot install, php_dir for channel "pear.php.net" is not writeable by the current user
usuario@equipo:~/$ sudo pear install Log-1.12.0RC1
[sudo] password for usuario:
WARNING: "pear/DB" is deprecated in favor of "pear/MDB2"
Did not download optional dependencies: pear/DB, pear/MDB2, pear/Mail, use --alldeps to download automatically
pear/Log can optionally use package "pear/DB" (version >= 1.3)
pear/Log can optionally use package "pear/MDB2" (version >= 2.0.0RC1)
pear/Log can optionally use package "pear/Mail"
pear/Log can optionally use PHP extension "sqlite"
downloading Log-1.12.0RC1.tgz ...
Starting to download Log-1.12.0RC1.tgz (44,386 bytes)
............done: 44,386 bytes
install ok: channel://pear.php.net/Log-1.12.0RC1
usuario@equipo:~/$

[Fox_Van]

Arriba se ve que en mi caso que estaba ocurriendo el mismo error solo era que me faltaba ejecutar la instalación del paquete como sudo