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| -rw-r--r-- | doc/apt.conf.5.xml | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/doc/apt.conf.5.xml b/doc/apt.conf.5.xml index 6b5ebf2d7..d5e185757 100644 --- a/doc/apt.conf.5.xml +++ b/doc/apt.conf.5.xml @@ -775,10 +775,34 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";}; install to the commands, one per line on the requested file descriptor, defaulting to standard input.</para> - <para>Version 2 of this protocol dumps more information, including the - protocol version, the APT configuration space and the packages, files - and versions being changed. Version 3 adds the architecture and <literal>MultiArch</literal> - flag to each version being dumped.</para> + <para>Version 2 of this protocol sends more information through the requested + file descriptor: a line with the text <literal>VERSION 2</literal>, + the APT configuration space, and a list of package actions with filename + and version information.</para> + + <para>Each configuration directive line has the form + <literal>key=value</literal>. Special characters (equal signs, newlines, + nonprintable characters, quotation marks, and percent signs in + <literal>key</literal> and newlines, nonprintable characters, and percent + signs in <literal>value</literal>) are %-encoded. Lists are represented + by multiple <literal>key::=value</literal> lines with the same key. The + configuration section ends with a blank line.</para> + + <para>Package action lines consist of five fields in Version 2: old version, direction + of version change (< for upgrades, > for downgrades, = for no + change), new version, action. The version fields are "-" for no version + at all (for example when installing a package for the first time; no + version is treated as earlier than any real version, so that is an + upgrade, indicated as <literal>- < 1.23.4</literal>). The action field + is "**CONFIGURE**" if the package is being configured, "**REMOVE**" if it + is being removed, or the filename of a .deb file if it is being + unpacked.</para> + + <para>In Version 3 after each version field follows the architecture + of this version, which is "-" if there is no version, and a field showing + the MultiArch type "same", foreign", "allowed" or "none". Note that "none" + is an incorrect typename which is just kept to remain compatible, it + should be read as "no" and users are encouraged to support both.</para> <para>The version of the protocol to be used for the command <literal><replaceable>cmd</replaceable></literal> can be chosen by setting |