ctrun(1)							   User Commands							  ctrun(1)

NAME

       ctrun - execute command in a process contract

SYNOPSIS

       /usr/bin/ctrun [options] command [ argument...]

DESCRIPTION

       The ctrun utility starts a command in a newly created process contract. ctrun holds the contract and can be instructed to output or respond
       to events that occur within the contract.

       For additional information about process contracts, see contract(4) and process(4).

OPTIONS

       The following options are supported:

       -i event,[event ...]
       -f event,[event ...]

	   Sets the informative and fatal events, respectively.

	   The following are valid events:

	   core 	   A member process dumped core.

			   core events are informative by default.

	   empty	   The last member of the process contract exited.

	   exit 	   A member process exited.

	   fork 	   A process was added to the process contract.

	   hwerr	   A member process encountered a hardware error.

			   hwerr events are fatal by default.

	   signal	   A member process received a fatal signal from a process in a different process contract.

	   Only core, hwerr, and signal events can be made fatal.

	   More events can be delivered than requested if ctrun requires them for its  own  purposes.  For  example,  empty  messages  are  always
	   requested if a lifetime of contract is specified. See -l.

       -l lifetime

	   The following valid lifetime values are supported:

	   child	   ctrun exits when the command exits, regardless of whether the contract is empty.

	   contract	   ctrun exits only when the contract exits. This is the default.

	   none 	   ctrun exits immediately, orphaning the contract.

       -o option,[option ...]

	   The following options are supported:

	   noorphan	   Kills all processes in the contract if the holder (ctrun) exits.

			   This option is invalid when a lifetime of none is specified.

	   pgrponly	   If a fatal error occurs, kills at most the process group of which the errant process is a member.

	   regent	   The contract inherits inheritable contracts when abandoned by member processes.

       -r count

	   If the contract encounters a fault, this option attempts to restart the command count times. If count is 0, the attempt to restart con-
	   tinues indefinitely. By default, ctrun does not attempt to restart the command.

	   This option is invalid if a lifetime other than contract is specified or if the pgrponly option is used.

       -t

	   If the contract created by ctrun inherited subcontracts from its member processes, attempts to transfer them to the new  contract  when
	   restarting.

	   This option is invalid unless -r is also specified.

       -v

	   Displays contract events and ctrun actions as they occur.

       -V

	   Displays verbose contract events, as are displayed by the -v option of ctwatch. Implies -v.

OPERANDS

       The following operands are supported:

       argument        One of the strings treated as an argument to command.

       command	       The command to be passed to execvp(2). See exec(2).

EXAMPLES

       Example 1: Running a Shell in a New Process Contract

       The following example runs a shell in a new process contract:

       example% ctrun -l child -o pgrponly ksh

       The  -l	child  option argument is specified so that ctrun won't wait until all children of the shell have exited. -o pgrponly is specified
       because an interactive ksh puts each job in a new process group, and an error in one job is unlikely to affect the others.

       Example 2: Running a Simple Server

       The following example runs a simple server:

       example% ctrun -r 0 -t -f hwerr,core,signal server

       The -r 0 and -t options are specified to indicate that if the server encounters a fatal error, ctrun should  try  to  restart  it.  The	-f
       option makes "hwerr", "core", and "signal" fatal events.

EXIT STATUS

       If  command  is	specified and successfully invoked (see exec(2)), the exit status of ctrun is the exit status of command. Otherwise, ctrun
       exits with one of the following values:

       123	The child process exited abnormally.

       124	ctrun encountered an internal error.

       125	Invalid arguments were provided to ctrun.

       126	command was found but could not be invoked.

       127	command could not be found.

FILES

       /system/contract/process/*

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |See below.		   |
       +-----------------------------+-----------------------------+

       Human Readable Output is Unstable. Invocation is Evolving.

SEE ALSO

       ctstat(1), ctwatch(1), exec(2), contract(4), process(4), attributes(5)

SunOS 5.10							    15 Jul 2004 							  ctrun(1)