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Top Forums Programming Wrapper for unix program - urgent help needed Post 302702577 by jim mcnamara on Tuesday 18th of September 2012 02:02:01 PM
Old 09-18-2012
I think you should look at time spent in calls. gettimeofday is one of the least expensive system calls there is.

Steps to do what you asked
1. create your own shared library, call it mylib.so
You do this by writing a do-nthing call:
Code:
int gettimeofday(void *a, void *b)
{
    return 1;
}

compile it as a shared library.
2. change your environment variables:
add
Code:
    export LD_PRELOAD=/path/to/mylib.so

When you run the application it will load YOUR version of gettimeofday.
1. it may not work in secure environments like selinux because you are hijacking a syscall.
2. it will not work with setuid or setgid executables

google for LD_PRELOAD and see other examples.
 

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AUTRACE:(8)						  System Administration Utilities					       AUTRACE:(8)

NAME
autrace - a program similar to strace SYNOPSIS
autrace program [-r] [program-args]... DESCRIPTION
autrace is a program that will add the audit rules to trace a process similar to strace. It will then execute the program passing arguments to it. The resulting audit information will be in the audit logs if the audit daemon is running or syslog. This command deletes all audit rules prior to executing the target program and after executing it. As a safety precaution, it will not run unless all rules are deleted with auditctl prior to use. OPTIONS
-r Limit syscalls collected to ones needed for analyzing resource usage. This could help people doing threat modeling. This saves space in logs. EXAMPLES
The following illustrates a typical session: autrace /bin/ls /tmp ausearch --start recent -p 2442 -i and for resource usage mode: autrace -r /bin/ls ausearch --start recent -p 2450 --raw | aureport --file --summary ausearch --start recent -p 2450 --raw | aureport --host --summary SEE ALSO
ausearch(8), auditctl(8). AUTHOR
Steve Grubb Red Hat Jan 2007 AUTRACE:(8)
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