Page History

...

• call the signal() function to reinstall a signal handler
• unconditionally modify a volatile sig_atomic_t variable (as modification to this type is atomic)
• call the _Exit() function to immediately terminate program execution
• use a function from the extremely small subset of library functions listed in your signal() documentation as async-safe

This is sometimes referred to as 'asynchronous-signal safe'.

*free-standing environment* \[[Banahan 03|AA. C References#Banahan 03]\]
An environment without the C standard libraries. Common for stand-alone programs, such as operating systems or firmware.

...