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Full Discussion: sed with Timestamp
Top Forums Shell Programming and Scripting sed with Timestamp Post 302933443 by Don Cragun on Friday 30th of January 2015 12:34:58 AM
Old 01-30-2015
Quote:
Originally Posted by mohanpadamata
Hi,

I would like to replace a "." with timestamp.
Constraint : I am making use of an existing shell script(called by a C program ) which reads the sed command from a properties file.I cant use/pass variables

Line in C program - $(echo ${filename} | sed "$TRANSFORM"
$TRANSFORM is populated using the line in properties file as below

Code:
Name-Transform: s/.xml$/$(date +%Y).xml/

input : abc.xml
Output : abc.$(date +%Y).xml
Expected output : abc2015.xml

Any idea ?

Thanks in advance
There are several things wrong here:
  1. You say you can't use/pass variables and then you show us code that passes the shell variables filename, TRANSFORM, and, presumably, variables that will correspond to the input, Output, and Expected output fields in your configuration file.
  2. If you have this line: $(echo ${filename} | sed "$TRANSFORM" in your C program, your C program will not compile. Shell command substitutions, pipelines, and variable expansions are not valid in a C program. Even if the calling program is a shell script instead of a C program, the command substitution is incomplete.
  3. There are no quotes in your configuration file. There is no way for a C program or a shell script to delimit the value that is supposed to be assigned to the shell variable TRANSFORM.
  4. The Output format in your configuration file contains two decimal points that appear to be literal characters. The Expected output contains one decimal point. How can these two possibly produce the desired results?
So what is really going on here?

Is this a homework assignment?
 

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IPTABLES-XML(8) 														   IPTABLES-XML(8)

NAME
iptables-xml -- Convert iptables-save format to XML SYNOPSIS
iptables-xml [-c] [-v] DESCRIPTION
iptables-xml is used to convert the output of iptables-save into an easily manipulatable XML format to STDOUT. Use I/O-redirection pro- vided by your shell to write to a file. -c, --combine combine consecutive rules with the same matches but different targets. iptables does not currently support more than one target per match, so this simulates that by collecting the targets from consecutive iptables rules into one action tag, but only when the rule matches are identical. Terminating actions like RETURN, DROP, ACCEPT and QUEUE are not combined with subsequent targets. -v, --verbose Output xml comments containing the iptables line from which the XML is derived iptables-xml does a mechanistic conversion to a very expressive xml format; the only semantic considerations are for -g and -j targets in order to discriminate between <call> <goto> and <nane-of-target> as it helps xml processing scripts if they can tell the difference between a target like SNAT and another chain. Some sample output is: <iptables-rules> <table name="mangle"> <chain name="PREROUTING" policy="ACCEPT" packet-count="63436" byte-count="7137573"> <rule> <conditions> <match> <p>tcp</p> </match> <tcp> <sport>8443</sport> </tcp> </conditions> <actions> <call> <check_ip/> </call> <ACCEPT/> </actions> </rule> </chain> </table> </iptables-rules> Conversion from XML to iptables-save format may be done using the iptables.xslt script and xsltproc, or a custom program using libxsltproc or similar; in this fashion: xsltproc iptables.xslt my-iptables.xml | iptables-restore BUGS
None known as of iptables-1.3.7 release AUTHOR
Sam Liddicott <azez@ufomechanic.net> SEE ALSO
iptables-save(8), iptables-restore(8), iptables(8) Jul 16, 2007 IPTABLES-XML(8)
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