Program support utilities

 

C

Language

Standard Library

Type support

Dynamic memory management

Error handling

Program utilities

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Thread support (C11)

Atomic operations (C11)

 

Program support utilities

Program termination
abort exit quick_exit (C++11) _Exit (C++11)	atexit at_quick_exit (C++11) EXIT_SUCCESS EXIT_FAILURE
Communicating with the environment
system	getenv
Signals
signal raise sig_atomic_t	SIG_DFL SIG_IGN SIG_ERR
Signal types
SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM
Non-local jumps
setjmp
longjmp
Types
jmp_buf

 

Program termination

The following functions manage program termination and resource cleanup.

Defined in header <stdlib.h>
abort	causes abnormal program termination (without cleaning up) (function)
exit	causes normal program termination with cleaning up (function)
quick_exit (C99)	causes normal program termination without completely cleaning up (function)
_Exit (C99)	causes normal program termination without cleaning up (function)
atexit	registers a function to be called on exit() invocation (function)
at_quick_exit (C99)	registers a function to be called on quick_exit invocation (function)
EXIT_SUCCESS EXIT_FAILURE	indicates program execution execution status (macro constant)

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.

Defined in header <signal.h>
signal	sets a signal handler for particular signal (function)
raise	runs the signal handler for particular signal (function)
sig_atomic_t	the integer type that can be accessed as an atomic entity from an asynchronous signal handler (typedef)
SIG_DFL SIG_IGN	defines signal handling strategies (macro constant)
SIG_ERR	error was encountered (macro constant)
Signal types
SIGABRT SIGFPE SIGILL SIGINT SIGSEGV SIGTERM	defines signal types (macro constant)

Non-local jumps

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