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Hi, I am writing to see if this is any util functions in libc that can help to determine it is currently running in a signal. I wrote some library and provide a function which will be used in many client code. However this function is not async-signal safe (it calls malloc(3)) so when it is called, I want to detect whether it is currently running in a signal handler. If it is, I can avoid calling those not-async-signal-safe functions which might cause deadlock. that is, I want a `in_signal_handler_context()' utility that can be used as this: int mylibfunc( void ) { if( in_signal_handler_context() ) { return(-1) } // rest of function goes here return( 0 ); } Yubin
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