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 directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output.
EXIT
lastwords will sample until a command with that name exits.
SEE ALSO
dtruss(1M), dtrace(1M)