Synopsis

on_demand_service_tool -L -l LABEL [OPTION…] COMMAND [ARG…]
on_demand_service_tool -U -l LABEL

Description

On-demand services may be registered with launchd(8) by using the --load form. One or more service names may be registered with the bootstrap server by specifying --mach-service. When a Mach message is sent to any of these services, launchd(8) will invoke COMMAND along with any arguments specified (ARG…). COMMAND must be an absolute pathname.

The --unload form unregisters jobs registered with launchd(8).

Options

-L, --load

Registers a job with launchd(8). --label=LABEL and COMMAND are required. This operation may also be referred to as “load” or “submit”.

-U, --unload

Unregisters a job with launchd(8). --label=LABEL is required. This operation may also be referred to as “unload” or “remove”.

-l, --label=LABEL

LABEL is used as the job label to identify the job to launchd(8). LABEL must be unique within a launchd(8) context.

-m, --mach-service=SERVICE

In conjunction with --load, registers SERVICE with the bootstrap server. Clients will be able to obtain a send right by looking up the SERVICE name with the bootstrap server. When a message is sent to such a Mach port, launchd(8) will invoke COMMAND along with any arguments specified (ARG…) if it is not running. This forms the “on-demand” nature referenced by this tool’s name. This option may appear zero, one, or more times. SERVICE must be unique within a bootstrap context.

--help

Display help and exit.

--version

Output version information and exit.

Examples

Registers an on-demand server that will execute catch_exception_tool(1) when a Mach message is sent to a Mach port obtained from the bootstrap server by looking up the name svc:

$ on_demand_service_tool --load --label=catch_exception \
      --mach-service=svc \
      $(which catch_exception_tool) --mach-service=svc \
      --file=/tmp/out --persistent --timeout=0

Unregisters the on-demand server installed above:

$ on_demand_service_tool --unload --label=catch_exception

Exit Status

0

Success.

1

Failure, with a message printed to the standard error stream.

See Also

catch_exception_tool(1), exception_port_tool(1), launchctl(1)

Resources

Crashpad home page: https://crashpad.chromium.org/.

Report bugs at https://crashpad.chromium.org/bug/new.

Copyright

Copyright 2016 The Crashpad Authors.

License

Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.