Program support utilities

From Cppreference

C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Utilities library
Program support utilities
Program termination abort exit quick_exit (C++11) _Exit (C++11) atexit at_quick_exit (C++11) Execution outcome indicators EXIT_SUCCESS EXIT_FAILURE Communicating with the environment system getenv Signals signal raise Signal handling strategies SIG_DFL SIG_IGN SIG_ERR Signal types SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM Non-local jumps setjmp longjmp Types jmp_buf

Contents 1 Program termination 1.1 Execution outcome indicators 2 Communicating with the environment 3 Signals 3.1 Signal handling strategies 3.2 Signal types 4 Non-local jumps 4.1 Types

[edit] Program termination

The following functions manage program termination and resource cleanup.

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 normal 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 exit() invocation (function)
at_quick_exit (C++11)	registers a function to be called on quick_exit invocation (function)
Execution outcome indicators
EXIT_SUCCESS	indicates successful program execution (macro constant)
EXIT_FAILURE	indicates unsuccessful program execution (macro constant)

[edit] Communicating with the environment

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

[edit] Signals

Several functions and macro constants for signal management are provided.

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_DFL	default signal handling (macro constant)
SIG_IGN	signal ignored (macro constant)
SIG_ERR	error was encountered (macro constant)
Signal types
SIGABRT	abnormal termination (macro constant)
SIGFPE	floating point exception (macro constant)
SIGILL	invalid instruction (macro constant)
SIGINT	interactive attention request sent to the program (macro constant)
SIGSEGV	invalid memory access (macro constant)
SIGTERM	termination request sent to the program (macro constant)

[edit] Non-local jumps

Defined in header <csetjmp>
setjmp	saves the context (function)
longjmp	jumps to specified location (function)
Types
jmp_buf	execution context type (function)