PROLOG

       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of this interface
       may differ (consult the corresponding Linux manual page for details of Linux behavior), or the  interface
       may not be implemented on Linux.

NAME

       exit — terminate a process

SYNOPSIS

       #include <stdlib.h>

       void exit(int status);

DESCRIPTION

       The  functionality  described  on  this  reference  page is aligned with the ISO C standard. Any conflict
       between the requirements described  here  and  the  ISO C  standard  is  unintentional.  This  volume  of
       POSIX.1‐2017 defers to the ISO C standard.

       The  value  of  status  may  be  0, EXIT_SUCCESS, EXIT_FAILURE, or any other value, though only the least
       significant 8 bits (that is, status & 0377) shall be available from wait() and waitpid(); the full  value
       shall be available from waitid() and in the siginfo_t passed to a signal handler for SIGCHLD.

       The  exit() function shall first call all functions registered by atexit(), in the reverse order of their
       registration, except that a function is called after any previously registered functions that had already
       been called at the time it was registered. Each function is called as many times as  it  was  registered.
       If,  during  the call to any such function, a call to the longjmp() function is made that would terminate
       the call to the registered function, the behavior is undefined.

       If a function registered by a call to atexit() fails to return, the remaining registered functions  shall
       not be called and the rest of the exit() processing shall not be completed. If exit() is called more than
       once, the behavior is undefined.

       The  exit()  function  shall  then flush all open streams with unwritten buffered data and close all open
       streams. Finally, the process shall be terminated with the same consequences as described in Consequences
       of Process Termination.

RETURN VALUE

       The exit() function does not return.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       See _Exit().

FUTURE DIRECTIONS

       None.

SEE ALSO

       _Exit(), atexit(), exec, longjmp(), tmpfile(), wait(), waitid()

       The Base Definitions volume of POSIX.1‐2017, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard
       for Information  Technology  --  Portable  Operating  System  Interface  (POSIX),  The  Open  Group  Base
       Specifications  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  In the event of any discrepancy between this version and the original
       IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee  document.
       The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

       Any  typographical  or formatting errors that appear in this page are most likely to have been introduced
       during  the  conversion  of  the  source  files  to  man  page  format.  To  report  such   errors,   see
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                                   2017                                          EXIT(3POSIX)