84 lines
2 KiB
Markdown
84 lines
2 KiB
Markdown
ifupdown-executor(7)
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# NAME
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*/usr/libexec/ifupdown-ng/program* - ifupdown executor protocol
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# DESCRIPTION
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The ifupdown executors are programs that are typically installed
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into the ifupdown-ng executor path. They follow a specific
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protocol documented in this man page.
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# PHASES
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Executors are run to react to seven different phases and are not
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required to take any specific action. These phases are:
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*depend*
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Called to determine if the executor wishes to change
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the dependency graph. The executor should write a
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space-delimited list of interface names it is dependent
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upon to _stdout_. Those interface names will be merged
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into the dependency graph. If an executor does not have
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any dependencies, it may simply exit 0 without doing
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anything.
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*pre-up*
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Called before the interface is going to be brought up.
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*up*
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Called when the interface is being brought up.
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*post-up*
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Called after the interface was successfully brought up.
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*pre-down*
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Called before the interface is going to be taken down.
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*down*
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Called when the interface is being taken down.
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*post-down*
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Called after the interface was successfully taken down.
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# ENVIRONMENT
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Executors are guaranteed to run with a core set of environment
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variables:
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*IFACE*
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The name of the interface being configured.
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*INTERFACES_FILE*
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The path to the interfaces database file being used.
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*MODE*
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Either _start_, _stop_ or _depend_ depending on phase.
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This environment variable is present for compatibility
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with legacy ifupdown scripts and should not be used in
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ifupdown-ng executors.
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*PHASE*
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The phase being executed. See the phases section for
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more information about phases.
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*VERBOSE*
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If present, verbose output is expected from the
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executor.
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Additionally, the properties associated with an interface are
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provided to executors. The keys are rewritten to begin with
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IF_ and are capitalized with dashes converted to underscores.
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For example, the property _bridge-ports_ will be rewritten as
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_IF_BRIDGE_PORTS_.
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# SEE ALSO
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ifup(8)++
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ifdown(8)++
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interfaces(5)
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# AUTHORS
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Ariadne Conill <ariadne@dereferenced.org>
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