PID and PPID - please explain :(- Post: 302577196

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execsnoop

execsnoop(1m)							   USER COMMANDS						     execsnoop(1m)

NAME

       execsnoop - snoop new process execution. Uses DTrace.

SYNOPSIS

       execsnoop [-a|-A|-ejhsvZ] [-c command]

DESCRIPTION

       execsnoop prints details of new processes as they are executed.	Details such as UID, PID and argument listing are printed out.

       This  program  is  very	useful	to examine short lived processes that would not normally appear in a prstat or "ps -ef" listing. Sometimes
       applications will run hundreds of short lived processes in their normal startup cycle, a behaviour that is easily monitored with execsnoop.

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

OPTIONS

       -a     print all data

       -A     dump all data, space delimited

       -e     safe output, parseable. This prevents the ARGS field containing "
"s, to assist postprocessing.

       -j     print project ID

       -s     print start time, us

       -v     print start time, string

       -Z     print zonename

       -c command
	      command name to snoop

EXAMPLES

       Default output, print processes as they are executed,
	      # execsnoop

       Print human readable timestamps,
	      # execsnoop -v

       Print zonename,
	      # execsnoop -Z

       Snoop this command only,
	      # execsnoop -c ls

FIELDS

       UID    User ID

       PID    Process ID

       PPID   Parent Process ID

       COMM   command name for the process

       ARGS   argument listing for the process

       ZONE   zonename

       PROJ   project ID

       TIME   timestamp for the exec event, us

       STRTIME
	      timestamp for the exec event, string

DOCUMENTATION

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

EXIT

       execsnoop will run forever until Ctrl-C is hit.

AUTHOR

       Brendan Gregg [Sydney, Australia]

SEE ALSO

       dtrace(1M), truss(1)

version 1.20							   Jul 02, 2005 						     execsnoop(1m)

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what is the meaning of ppid 1?

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