abort(3) — Linux manual page

abort(3)                Library Functions Manual                abort(3)

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)

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                       abort(3)

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

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