Program support utilities - cppreference.com

From cppreference.com

Program termination

The following functions manage program termination and resources cleanup.

Defined in header

<stdlib.h>

abort

causes abnormal program termination (without cleaning up)
(function)

[edit]

exit

causes normal program termination with cleaning up
(function)

[edit]

quick_exit

(C11)

causes normal program termination without completely cleaning up
(function)

[edit]

_Exit

(C99)

causes normal program termination without cleaning up
(function)

[edit]

atexit

registers a function to be called on

exit()

invocation
(function)

[edit]

at_quick_exit

(C11)

registers a function to be called on

quick_exit

invocation
(function)

[edit]

EXIT_SUCCESSEXIT_FAILURE

indicates program execution execution status
(macro constant)

[edit]

Unreachable control flow

Communicating with the environment

Memory alignment query

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)

[edit]

raise

runs the signal handler for particular signal
(function)

[edit]

sig_atomic_t

the integer type that can be accessed as an atomic entity from an asynchronous signal handler
(typedef)

SIG_DFLSIG_IGN

defines signal handling strategies
(macro constant)

[edit]

SIG_ERR

error was encountered
(macro constant)

[edit]

Signal types

SIGABRTSIGFPESIGILLSIGINTSIGSEGVSIGTERM

defines signal types
(macro constant)

[edit]

Non-local jumps

References

C23 standard (ISO/IEC 9899:2024):

7.13 Non-local jumps <setjmp.h> (p: 283-284)

7.14 Signal handling <signal.h> (p: 285-287)

7.24 General utilities <stdlib.h> (p: 356-374)

7.33.9 Signal handling <signal.h> (p: 458)

7.33.16 General utilities <stdlib.h> (p: 458)

C17 standard (ISO/IEC 9899:2018):

7.13 Nonlocal jumps <setjmp.h> (p: 191-192)

7.14 Signal handling <signal.h> (p: 193-195)

7.22 General utilities <stdlib.h> (p: 248-262)

7.31.7 Signal handling <signal.h> (p: 332)

7.31.12 General utilities <stdlib.h> (p: 333)

C11 standard (ISO/IEC 9899:2011):

7.13 Nonlocal jumps <setjmp.h> (p: 262-264)

7.14 Signal handling <signal.h> (p: 265-267)

7.22 General utilities <stdlib.h> (p: 340-360)

7.31.7 Signal handling <signal.h> (p: 455)

7.31.12 General utilities <stdlib.h> (p: 456)

C99 standard (ISO/IEC 9899:1999):

7.13 Nonlocal jumps <setjmp.h> (p: 243-245)

7.14 Signal handling <signal.h> (p: 246-248)

7.20 General utilities <stdlib.h> (p: 306-324)

7.26.6 Signal handling <signal.h> (p: 401)

7.26.10 General utilities <stdlib.h> (p: 402)

C89/C90 standard (ISO/IEC 9899:1990):

4.6 NON-LOCAL JUMPS <setjmp.h>

4.7 SIGNAL HANDLING <signal.h>

4.10 GENERAL UTILITIES <stdlib.h>

4.13.5 Signal handling <signal.h>

7.13.7 General utilities <stdlib.h>