Program support utilities

Program termination

The following functions manage program termination and resource cleanup.

Template:cpp/utility/program/dcl list EXIT SUCCESSTemplate:cpp/utility/program/dcl list EXIT FAILURE

Defined in header <cstdlib>
abort	causes abnormal program termination (without cleaning up) (function)
exit	causes normal program termination with cleaning up (function)
quick_exit (C++11)	causes quick program termination without completely cleaning up (function)
_Exit (C++11)	causes normal program termination without cleaning up (function)
atexit	registers a function to be called on std::exit() invocation (function)
at_quick_exit (C++11)	registers a function to be called on std::quick_exit invocation (function)
Execution outcome indicators

p

Communicating with the environment

system	calls the host environment's command processor (function)
getenv	access to the list of environment variables (function)

Signals

Several functions and macro constants for signal management are provided.

Template:cpp/utility/program/dcl list SIG DFLTemplate:cpp/utility/program/dcl list SIG IGNTemplate:cpp/utility/program/dcl list SIGABRTTemplate:cpp/utility/program/dcl list SIGFPETemplate:cpp/utility/program/dcl list SIGILLTemplate:cpp/utility/program/dcl list SIGINTTemplate:cpp/utility/program/dcl list SIGSEGVTemplate:cpp/utility/program/dcl list SIGTERM

Defined in header <csignal>
signal	sets a signal handler for particular signal (function)
raise	runs the signal handler for particular signal (function)
Signal handling strategies
SIG_ERR	return value of signal specifying that an error was encountered (macro constant)
Signal types

Non-local jumps

setjmp	saves the context (function macro)
longjmp	jumps to specified location (function)
Types
jmp_buf	execution context type (typedef)