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lastwords(1)                    USER COMMANDS                   lastwords(1)




NAME

       lastwords - print syscalls before exit. Uses DTrace.


SYNOPSIS

       lastwords command


DESCRIPTION

       This  prints the last few system calls for processes matching the given
       name, when they exit. This makes use of  a  ring  buffer  so  that  the
       impact on the system is minimised.

       Since  this  uses  DTrace, only users with root privileges can run this
       command.


EXAMPLES

       Catch last few syscalls for dying netscape processes,
              # lastwords netscape



FIELDS

       TIME   time of syscall return, ns

       PID    process ID

       EXEC   process name (execname)

       SYSCALL
              system call

       RETURN return value for the system call

       ERR    errno for the system call



BASED ON

       /usr/demo/dtrace/ring.d



DOCUMENTATION

       DTrace Guide "Buffers and Buffering" chapter (docs.sun.com)

       See the DTraceToolkit for further documentation under the  Docs  direc-
       tory. The DTraceToolkit docs may include full worked examples with ver-
       bose descriptions explaining the output.


EXIT

       lastwords will sample until a command with that name exits.


SEE ALSO

       dtruss(1M), dtrace(1M)




version 0.70                     Jun 08, 2005                    lastwords(1)

Mac OS X 10.6 - Generated Thu Sep 17 20:07:58 CDT 2009
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