12-04-2004
where does :
exec 3
exec 4
exec 5
come into the picture.. ?
so far I have understood the stdout and stderr
but i don't see how this the use of exec or the use of fd 3 can write to a file. or how fd 4 can read stndin and how fd 5 can stdout to tty.. i am not making the connection between the numbers and the exec command basically for 3 to 5.
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LEARN ABOUT DEBIAN
dh-exec-install
DH-EXEC-INSTALL(1) dh-exec DH-EXEC-INSTALL(1)
NAME
dh-exec-install - Install (and possibly rename) files.
SYNOPSIS
#! /usr/bin/dh-exec
debian/default.conf => /etc/my-package/start.conf
usr/bin/*
DESCRIPTION
Being a sub-command of dh-exec(1), this program must not be ran directly, but through dh-exec, which automatically runs all available
sub-commands if run bare; or explicitly with dh-exec --with=install.
It is meant to be used for dh_install(1) files, and those alone. If it finds that its input is not such a file, it will do nothing, but
echo back the contents.
The purpose of the program is to extend dh_install(1)'s functionality, by allowing to specify a destination filename.
This can be accomplished by a special syntax: the " => " mark between a source and a destination means that the source file should be
installed with the specified destination name.
For obvious reasons, the source must not be a wildcard, and the destination in this case must be a file, and not a directory.
All other non-comment lines are left alone.
RESTRICTIONS
Due to the way executable scripts are called from debhelper(1), there is no way to know what options were used for the original
dh_install(1). This means, that the --sourcedir option of dh_install(1) will not work correctly when dh-exec-install is in use.
IMPLEMENTATION
Internally, the renaming happens by creating a temporary directory under debian/tmp/, and copying (or moving, if the source was under
debian/tmp/ to begin with) the file there, with the new name.
This is done this way to allow dh_install(1) to do the real copying, and allow its options to continue working, even when renaming is
involved.
The temporary directory is put under debian/tmp so that it will be cleaned by dh_prep(1) when the clean target gets to run. Thus, no extra
code is needed anywhere to clean up the renamed files.
ENVIRONMENT
DH_EXEC_SCRIPTDIR
Indicates which directory the command-specific scripts should be sought for. If not specified, scripts will be searched for in
/usr/share/dh-exec/.
FILES
$DH_EXEC_SCRIPTDIR/dh-exec-install-*
The various scripts for the higher-level program.
SEE ALSO
debhelper(1), dh-exec(1), dh_install(1)
AUTHOR
dh-exec-install is copyright (C) 2011-2012 by Gergely Nagy <algernon@madhouse-project.org>.
2012-05-03 DH-EXEC-INSTALL(1)