abort(3) — Linux manual page


ABORT(3)                Linux Programmer's Manual               ABORT(3)

NAME         top

       abort - cause abnormal process termination

SYNOPSIS         top

       #include <stdlib.h>

       noreturn void abort(void);

DESCRIPTION         top

       The abort() function first unblocks the SIGABRT signal, and then
       raises that signal for the calling process (as though raise(3)
       was called).  This results in the abnormal termination of the
       process unless the SIGABRT signal is caught and the signal
       handler does not return (see longjmp(3)).

       If the SIGABRT signal is ignored, or caught by a handler that
       returns, the abort() function will still terminate the process.
       It does this by restoring the default disposition for SIGABRT and
       then raising the signal for a second time.

RETURN VALUE         top

       The abort() function never returns.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see

       │Interface                             Attribute     Value   │
       │abort()                               │ Thread safety │ MT-Safe │

CONFORMING TO         top

       SVr4, POSIX.1-2001, POSIX.1-2008, 4.3BSD, C89, C99.

NOTES         top

       Up until glibc 2.26, if the abort() function caused process
       termination, all open streams were closed and flushed (as with
       fclose(3)).  However, in some cases this could result in
       deadlocks and data corruption.  Therefore, starting with glibc
       2.27, abort() terminates the process without flushing streams.
       POSIX.1 permits either possible behavior, saying that abort()
       "may include an attempt to effect fclose() on all open streams".

SEE ALSO         top

       gdb(1), sigaction(2), assert(3), exit(3), longjmp(3), raise(3)

COLOPHON         top

       This page is part of release 5.13 of the Linux man-pages project.
       A description of the project, information about reporting bugs,
       and the latest version of this page, can be found at

GNU                            2021-03-22                       ABORT(3)

Pages that refer to this page: assert(3)assert_perror(3)mallopt(3)mcheck(3)stdio(3)signal(7)signal-safety(7)