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Top Forums Shell Programming and Scripting Trouble reading content of file from a variable Post 302880740 by rbatte1 on Monday 23rd of December 2013 04:53:34 AM
Old 12-23-2013
So, are you saying that you have $a set as DML_FILE_NAME_ORIG1=$INF_COMRCLDATAMART_DML/ft_arnge_cred_risk_mtgt_fact.dml then?

This will not work. You are asking the shell to work with a file that isn't one. Which is the file you actually want to work with? I presume it's the one referred to by DML_FILE_NAME_ORIG1, i.e. $INF_COMRCLDATAMART_DML/ft_arnge_cred_risk_mtgt_fact.dml

This far down the chain of variables, the $ will just be a character. You need to get that interpreted before you call the cp command.


I would suggest that your logic is over complicated. Break it down to find a simpler way to refer to the file you need. If not, you will end up with a mess of:-
  • I want to use cp $a $b
  • $a refers to DML.....
  • $DML.... refers to $INF.... and a file.
It's just too messy.

Are the records in $AI_BIN/input.txt also variable names or variable assignments that you want to use? Can you share the format of that file so we can see what are trying to process.


Try to slim the code down to the minimal structure and just have a one record input file to your loop, then after pasting it into the thread along with the content of $AI_BIN/input.txt, can you run the script with ksh -x yourscript to illustrate where it is going. It might be obvious to you then, but if not I'm sure we can discuss it further.



Robin
 

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LIQUIDSOAP(1)						      General Commands Manual						     LIQUIDSOAP(1)

NAME
liquidsoap - a multimedia streaming language SYNOPSIS
liquidsoap [options] [script|expression] DESCRIPTION
Liquidsoap is a programming language for describing multimedia streaming systems. It is very flexible, making simple things simple but giving a lot of control for advanced uses. Liquidsoap supports audio, video and MIDI streams, and a wide range of input/output operators including Icecast and various soundcard APIs. It can perform a broad range of signal processing, combine streams in various ways, support custom transitions, generate sound procedurally... and all this can be assembled as you wish. Input files can be accessed remotely, or even be synthesized on the fly using external scripts such as speech synthesis. Finally, interaction with a running liquidsoap instance is possible via telnet or socket. Liquidsoap scripts passed on the command line will be evaluated: they shall be used to define the streaming system to be ran. It is possi- ble to pass multiple scripts; they will all be ran successively, and definitions from one script can be used in subsequent ones. A script will be read from standard input if - is given as script filename. Information about scripting liquidsoap is available on our website: http://savonet.sf.net/ If the parameter is not a file it will be treated as an expression which will be executed. It is a convenient way to test simple one-line scripts. When running only one-liners, the default is to log messages directly on stdout rather than to a file. OPTIONS
- Read script from standard input. -- Stop parsing the command-line and pass subsequent items to the script. --debug Print debugging log messages. --dynamic-plugins-dir path Directory where to look for plugins. --errors-as-warnings Issue warnings instead of fatal errors for unused variables and ignored expressions. If you are not sure about it, it is better to not use it. --interactive Start an interactive interpreter. --list-plugins List all plugins (builtin scripting values, supported formats and protocols). --list-plugins-xml List all plugins (builtin scripting values, supported formats and protocols), output as XML. --no-pervasives Do not load pervasive script libraries. --version Display liquidsoap's version. -c, --check Check and evaluate scripts but do not perform any streaming. -cl, --check-lib Like --check but treats all scripts and expressions as libraries, so that unused toplevel variables are not reported. -d, --daemon Run in daemon mode. -f, --force-start For advanced dynamic uses: force liquidsoap to start even when no active source is initially defined. -h plugin Print the description of a plugin, eg. a builtin scripting function. -i Display infered types. -p, --parse-only Parse scripts but do not type-check and run them. -q, --quiet Do not print log messages on standard output. -r filename Process a request. -T, --disable-telnet Disable the telnet server. -U, --disable-unix-socket Disable the unix socket. -t, --enable-telnet Enable the telnet server. -u, --enable-unix-socket Enable the unix socket. -v, --verbose Print log messages on standard output. --conf-descr-key key Describe a configuration key. --conf-descr Show all configuration keys with their documentation. --conf-descr-liqi Show all configuration keys with their documentation in liqi (documentation wiki) format. --conf-dump Dump the configuration state -help, --help Display this list of options SEE ALSO
Our website http://savonet.sf.net/ and the HTML documentation coming with your distribution of liquidsoap. AUTHOR
Savonet team <savonet-users@lists.sourceforge.net> Liquidsoap 1.0.1 June 25, 2012 LIQUIDSOAP(1)
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