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