abort(3) - Linux manual page (original) (raw)

abort(3) Library Functions Manual abort(3)

NAME top

   abort - cause abnormal process termination

LIBRARY top

   Standard C library (_libc_, _-lc_)

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)](../man3/raise.3.html) 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)](../man3/longjmp.3.html)).

   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)](../man3/atexit.3.html) and [on_exit(3)](../man3/on%5Fexit.3.html) are not called.

RETURN VALUE top

   The **abort**() function never returns.

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **abort**()                              │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

STANDARDS top

   C11, POSIX.1-2008.

HISTORY top

   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)](../man3/fclose.3.html)).  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)](../man1/gdb.1.html), [sigaction(2)](../man2/sigaction.2.html), [assert(3)](../man3/assert.3.html), [exit(3)](../man3/exit.3.html), [longjmp(3)](../man3/longjmp.3.html), [raise(3)](../man3/raise.3.html)

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Linux man-pages 6.10 2024-07-23 abort(3)

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