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Full Discussion: Redirecting stderr while live
Top Forums Shell Programming and Scripting Redirecting stderr while live Post 302140906 by reborg on Tuesday 16th of October 2007 03:10:33 PM
Old 10-16-2007
The only way I can think of that you could do this is if you are running on Solaris 10.

In that case you could capture the output with DTrace, otherwise the next best thing would be truss to strace to see if the script is doing the kind of thing it should be doing.
 

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LEARN ABOUT SUNOS

fasttrap

fasttrap(7D)							      Devices							      fasttrap(7D)

NAME

       fasttrap - DTrace user instruction tracing provider

DESCRIPTION

       The  fasttrap  driver  is a DTrace dynamic tracing provider that performs dynamic instrumentation of arbitrary instructions in Solaris pro-
       cesses. The fasttrap driver implements the DTrace fasttrap and pid providers.

       The fasttrap driver is not a public interface and you access instrumentation offered by this provider through DTrace. Refer to the  Solaris
       Dynamic Tracing Guide for a description of the public documented interfaces available for the DTrace facility and the probes offered by the
       fasttrap provider.

SPARC ONLY

       The fasttrap provider provides a DTrace probe that fires each time a user process executes an instruction. The pid provider allows for  the
       dynamic	creation  of  DTrace  probes  corresponding  to  instruction locations inside any user process specified using a process ID and an
       instruction address or symbol name. Together these providers permit DTrace users to perform instrumentation of Solaris user  processes  and
       to  trace  the  interactions  between  processes  and the operating system. See the chapter entitled "User Process Tracing"  in the Solaris
       Dynamic Tracing Guide for information on how to use these providers to instrument processes.

ATTRIBUTES

       See attributes(5) for a description of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWdtrp			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Private			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       dtrace(1M), attributes(5), dtrace(7D)

       Solaris Dynamic Tracing Guide

SunOS 5.10							    4 Sep 2003							      fasttrap(7D)
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