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Full Discussion: Check null value in xml
Top Forums Shell Programming and Scripting Check null value in xml Post 302775201 by Yoda on Monday 4th of March 2013 09:38:18 AM
Old 03-04-2013
I noticed that in your code you are checking if your file size is empty, but if that is what you want, it is OK.

But if you are looking for a method to check if tag value is empty and insert current timestamp in it, then code something like:
Code:
awk -F'[<>]' ' BEGIN {
                cmd = "date +%Y%m%d%H%M%S"
} /<timestamp1>/ {
        if ( $3 == "" )
        {
                cmd | getline dt
                close(cmd)
                $0 = "<timestamp1>" dt "</timestamp1>"
        }
} 1 ' xml

 

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LEARN ABOUT CENTOS

trace-cmd-stack

TRACE-CMD-STACK(1)														TRACE-CMD-STACK(1)

NAME

       trace-cmd-stack - read, enable or disable Ftrace Linux kernel stack tracing.

SYNOPSIS

       trace-cmd stack

DESCRIPTION

       The trace-cmd(1) stack enables the Ftrace stack tracer within the kernel. The stack tracer enables the function tracer and at each function
       call within the kernel, the stack is checked. When a new maximum usage stack is discovered, it is recorded.

       When no option is used, the current stack is displayed.

       To enable the stack tracer, use the option --start, and to disable the stack tracer, use the option --stop. The output will be the maximum
       stack found since the start was enabled.

       Use --reset to reset the stack counter to zero.

SEE ALSO

       trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(1),
       trace-cmd-list(1), trace-cmd-listen(1)

AUTHOR

       Written by Steven Rostedt, <rostedt@goodmis.org[1]>

RESOURCES

       git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git

COPYING

       Copyright (C) 2010 Red Hat, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).

NOTES

	1. rostedt@goodmis.org
	   mailto:rostedt@goodmis.org

								    06/11/2014							TRACE-CMD-STACK(1)
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