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Top Forums Shell Programming and Scripting Perl open(CMD, "cmd |"); buffering problem.. Post 302593563 by thegeek on Friday 27th of January 2012 10:01:18 AM
Old 01-27-2012
Are you sure the 3rd party application writes everything to STDOUT ? Bcoz, you are likely to miss the stuffs printed on STDERR ... But when you execute manually and see output you are likely to miss where it prints .. So try doing with redirection of error to different place & confirm !
 

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TRACE-CMD-LIST(1)														 TRACE-CMD-LIST(1)

NAME
trace-cmd-list - list available plugins, events or options for Ftrace. SYNOPSIS
trace-cmd list [OPTIONS] DESCRIPTION
The trace-cmd(1) list displays the available plugins, events or Ftrace options that are configured on the current machine. If no option is given, then it lists all plugins, events and Ftrace options to standard output. OPTIONS
-e This option will list the available events that are enabled on the local system. -t This option will list the available tracers that are enabled on the local system. -p Same as -t and only for legacy purposes. -o This option will list the available Ftrace options that are configured on the local system. -f [regex] This option will list the available filter functions. These are the list of functions on the system that you can trace, or filter on. It takes an optional argument that uses regcomp(3) expressions to seach. trace-cmd list -f '^sched.*' -P List the plugin files that get loaded on trace-cmd report. -O List plugin options that can be used by trace-cmd report -O option. SEE ALSO
trace-cmd(1), trace-cmd-record(1), trace-cmd-report(1), trace-cmd-start(1), trace-cmd-stop(1), trace-cmd-extract(1), trace-cmd-reset(1), trace-cmd-split(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-LIST(1)
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