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.