diff options
| author | David Kalnischkies <kalnischkies@gmail.com> | 2013-08-13 18:18:15 +0200 |
|---|---|---|
| committer | David Kalnischkies <kalnischkies@gmail.com> | 2013-08-16 11:12:03 +0200 |
| commit | 48498443e74b2a7e089709b954c50b7df374684b (patch) | |
| tree | c75bd81c895e9f9e381156712ace83bb18d3b642 /doc/apt.conf.5.xml | |
| parent | 4b2803b8ff72b0c865c6539b2f99abea5ceee4c6 (diff) | |
allow Pre-Install-Pkgs hooks to get info over an FD != stdin
This adds ::InfoFD option alongside the ::Version one to request sending
the information to the specified FD, by default it is STDIN as it was
the case before.
The environment variable APT_HOOK_INFO_FD contains the FD the data is on as
a confirmation that the APT version used understood the request.
Allowing the hook to choose the FD is needed/helpful e.g. for shellscripts
which have a hard time accessing FDs above 9 (as >= 10 are usually used
internally by them)
Closes: #671728
Diffstat (limited to 'doc/apt.conf.5.xml')
| -rw-r--r-- | doc/apt.conf.5.xml | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/doc/apt.conf.5.xml b/doc/apt.conf.5.xml index f5e1f966d..42119baa5 100644 --- a/doc/apt.conf.5.xml +++ b/doc/apt.conf.5.xml @@ -688,7 +688,8 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";}; <literal>options</literal> this must be specified in list notation. The commands are invoked in order using <filename>/bin/sh</filename>; should any fail APT will abort. APT will pass the filenames of all .deb files it is going to - install to the commands, one per line on standard input.</para> + 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 @@ -700,7 +701,15 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";}; <literal>DPkg::Tools::options::<replaceable>cmd</replaceable>::Version</literal> accordingly, the default being version 1. If APT isn't supporting the requested version it will send the information in the highest version it has support for instead. - </para></listitem> + </para> + + <para>The file descriptor to be used to send the information can be requested with + <literal>DPkg::Tools::options::<replaceable>cmd</replaceable>::InfoFD</literal> + which defaults to <literal>0</literal> for standard input and is available since + version 0.9.11. Support for the option can be detected by looking for the environment + variable <envar>APT_HOOK_INFO_FD</envar> which contains the number of the used + file descriptor as a confirmation.</para> + </listitem> </varlistentry> <varlistentry><term><option>Run-Directory</option></term> |