NAME

       abort - cause abnormal process termination

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <stdlib.h>

       [[noreturn]] void abort(void);

DESCRIPTION

       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.

       As  with  other  cases of abnormal termination the functions registered with atexit(3) and on_exit(3) are
       not called.

RETURN VALUE

       The abort() function never returns.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).

       ┌──────────────────────────────────────────────────────────────────────────────┬───────────────┬─────────┐
       │Interface                                                                     │ Attribute     │ Value   │
       ├──────────────────────────────────────────────────────────────────────────────┼───────────────┼─────────┤
       │abort()                                                                       │ Thread safety │ MT-Safe │
       └──────────────────────────────────────────────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

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

       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

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