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edits
Changes
Added the "return value" section
The <code>signum</code> is the signal that will be sent to notify.
== Return value ==
The system call returns -1 in case error has occurred. In case of <code>UBSTAT_UBPARMNUM</code it returns <code>UB_RESOURCES</code> and in all other cases it returns the amount of bytes written to the <code>buf</code>.
= Demo =
