ctrun(1) User Commands ctrun(1)NAMEctrun - 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:
-A fmri aux Sets the process contract creator's auxiliary
field.
-i event,[event ...] Sets the informative and fatal events,
-f event,[event ...] 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 con‐
tract 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 differ‐
ent 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 speci‐
fied. See -l.
-F fmri Sets the process contract service FMRI field.
To set this field the caller is required to
have the {PRIV_CONTRACT_IDENTITY} in its
effective set.
-l lifetime The following valid lifetime values are sup‐
ported:
child ctrun exits when the command
exits, regardless of whether the
contract is empty.
contract ctrun exits only when the con‐
tract exits. This is the default.
none ctrun exits immediately, orphan‐
ing the contract.
-o option,[option ...] The following options are supported:
noorphan Kills all processes in the con‐
tract 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 mem‐
ber 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
continues 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 dis‐
played 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 │SUNWcs │
├─────────────────────────────┼─────────────────────────────┤
│Interface Stability │See below. │
└─────────────────────────────┴─────────────────────────────┘
Human Readable Output is Uncommitted. Invocation is Committed.
SEE ALSOctstat(1), ctwatch(1), exec(2), contract(4), process(4), attributes(5)SunOS 5.11 25 Feb 2008 ctrun(1)
