NAME

       abort - cause abnormal process termination

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.

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 │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

CONFORMING TO

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

NOTES

       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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