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Full Discussion: sed - How to insert line before the first blank line following a token
Top Forums Shell Programming and Scripting sed - How to insert line before the first blank line following a token Post 302881367 by disedorgue on Saturday 28th of December 2013 04:32:50 PM
Old 12-28-2013
Code:
$ echo $MY_FILE
beforeblank.conf
$ echo $MY_TOKEN
media_dir
$ echo $MY_PARAMETER_VALUE
media_dir = /srv/media/my_personal_new_data

Code:
$ cat $MY_FILE
#
# port for HTTP (descriptions, SOAP, media transfer) traffic
port=8200

# network interfaces to serve, comma delimited
network_interface=eth0

# set this to the directory you want scanned.
# * if have multiple directories, you can have multiple media_dir= lines
# * if you want to restrict a media_dir to a specific content type, you
#   can prepend the type, followed by a comma, to the directory:
#   + "A" for audio  (eg. media_dir=A,/home/jmaggard/Music)
#   + "V" for video  (eg. media_dir=V,/home/jmaggard/Videos)
#   + "P" for images (eg. media_dir=P,/home/jmaggard/Pictures)
#media_dir=V,/srv/media/film
#media_dir=A,/srv/media/musique
#media_dir=P,/srv/media/photo
#media_dir = /home/some_user/my_personal_old_data

# set this if you want to customize the name that shows up on your clients
friendly_name=SJL DLNA Server MY_SERVER OPENSUSE 13.1

Code:
$ sed -e "/$MY_TOKEN/,/^[[:blank:]]*$/{" -e "\|^[[:blank:]]*$|s|.*|${MY_PARAMETER_VALUE}\n&|g" -e "}" $MY_FILE
#
# port for HTTP (descriptions, SOAP, media transfer) traffic
port=8200

# network interfaces to serve, comma delimited
network_interface=eth0

# set this to the directory you want scanned.
# * if have multiple directories, you can have multiple media_dir= lines
# * if you want to restrict a media_dir to a specific content type, you
#   can prepend the type, followed by a comma, to the directory:
#   + "A" for audio  (eg. media_dir=A,/home/jmaggard/Music)
#   + "V" for video  (eg. media_dir=V,/home/jmaggard/Videos)
#   + "P" for images (eg. media_dir=P,/home/jmaggard/Pictures)
#media_dir=V,/srv/media/film
#media_dir=A,/srv/media/musique
#media_dir=P,/srv/media/photo
#media_dir = /home/some_user/my_personal_old_data
media_dir = /srv/media/my_personal_new_data

# set this if you want to customize the name that shows up on your clients
friendly_name=SJL DLNA Server MY_SERVER OPENSUSE 13.1

Last line of file must a blank line.
To modified directly the file, you can use -i option if your sed support.
You just create a function that call this type de sed command.
Regards.
This User Gave Thanks to disedorgue For This Post:
jcdole
 

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LEARN ABOUT DEBIAN

minidlna

MINIDLNA(1)						      General Commands Manual						       MINIDLNA(1)

NAME

     minidlna -- lightweight DLNA/UPnP-AV server

SYNOPSIS

     minidlna [-f config_file] [-d] [-a -listening_ip] [-p port] [-s serial] [-m model_number] [-t notify_interval] [-P pid_filename] [-w url]
	      [-R]

     minidlna [-h | -V]

DESCRIPTION

     The minidlna daemon is a DLNA/UPnP-AV server sharing media files (video, music and pictures) to clients on your network. Clients are typi-
     cally multimedia players such as vlc, totem and xbmc, and devices such as portable media players, smartphones, televisions, video game enter-
     tainment systems and blu-ray players.

OPTIONS

     All the options below (except -f) can also be set in a configuration file (see minidlna.conf(5)).

     -a listening_ip
	     IP address the daemon should be listening on.

     -d      Activate debug mode (do not daemonize).

     -f config_file
	     Specify the location of the configuration file. Uses /etc/minidlna.conf by default.

     -h      Show help and exit.

     -m model_number
	     Model number the daemon will report to clients in its XML description.

     -P pid_filename
	     PID file to use; the default is /run/minidlna.pid.

     -p port
	     Port number to listen on; the default is port 80.

     -R      Forces a full rescan of the media files.

     -s serial
	     Serial number the daemon will report to clients in its XML description.

     -t notify_interval
	     Notify interval, in seconds; defaults to 895 seconds.

     -V      Show the program version and exit.

     -w url  Sets the presentation url; the default is http address.

FILES

     /etc/minidlna.conf
	     Default system-wide configuration file. See minidlna.conf(5) for details on the syntax.

SEE ALSO

     minidlna.conf(5)

Debian								   July 21, 2011							    Debian
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