abort

 

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Strings library

Algorithms

Numerics

Date and time utilities

Input/output support

Localization support

Concurrency support (哋它亢11)

Technical Specifications

Symbol index

 

Program support utilities

Program termination
abort exit quick_exit (哋它亢11) _Exit (哋它亢99)	atexit at_quick_exit (哋它亢11) EXIT_SUCCESSEXIT_FAILURE
Unreachable control flow
unreachable (哋它亢23)
Communicating with the environment
system	getenvgetenv_s (哋它亢11)
Signals
signal raise sig_atomic_t	SIG_DFLSIG_IGN SIG_ERR
Signal types
SIGABRTSIGFPESIGILL	SIGINTSIGSEGVSIGTERM
Non-local jumps
setjmp	longjmp
Types
jmp_buf

 

Defined in header <stdlib.h>
void abort(void);		(until 哋它亢11)
_Noreturn void abort(void);		(since 哋它亢11) (until 哋它亢23)
[[noreturn]] void abort(void);		(since 哋它亢23)

Causes abnormal program termination unless SIGABRT is being caught by a signal handler passed to signal and the handler does not return.

Functions passed to atexit() are not called. Whether open resources such as files are closed is implementation defined. An implementation defined status is returned to the host environment that indicates unsuccessful execution.

Parameters

(none)

Return value

(none)

Notes

POSIX specifies that the abort() function overrides blocking or ignoring the SIGABRT signal.

Some compiler intrinsics, e.g. __builtin_trap (gcc, clang, and icc) or __fastfail/__debugbreak (msvc), can be used to terminate the program as fast as possible.

Example

Run this code

#include <stdio.h>
#include <stdlib.h>
 
int main(void)
{
    FILE *fp = fopen("data.txt","r");
    if (fp == NULL)
    {
        fprintf(stderr, "error opening file data.txt in function main()\n");
        abort();
    }
 
    /* Normal processing continues here. */
    fclose(fp);
    printf("Normal Return\n");
    return 0;
}

Output:

error opening file data.txt in function main()

References

• 哋它亢17 standard (ISO/IEC 9899:2018):

• 7.22.4.1 The abort function (p: 255)

• 哋它亢11 standard (ISO/IEC 9899:2011):

• 7.22.4.1 The abort function (p: 350)

• 哋它亢99 standard (ISO/IEC 9899:1999):

• 7.20.4.1 The abort function (p: 315)

• 哋它亢89/C90 standard (ISO/IEC 9899:1990):

• 4.10.4.1 The abort function

See also

exit	causes normal program termination with cleaning up (function)
atexit	registers a function to be called on exit() invocation (function)
quick_exit (哋它亢11)	causes normal program termination without completely cleaning up (function)