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.1‐2008 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  to  a  waiting
       parent process.

       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()

       The Base Definitions volume of POSIX.1‐2008, <stdlib.h>

COPYRIGHT

       Portions of this text are reprinted and  reproduced  in  electronic  form  from  IEEE  Std
       1003.1,  2013  Edition,  Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013  by  the
       Institute  of  Electrical  and  Electronics  Engineers,  Inc and The Open Group.  (This is
       POSIX.1-2008 with the  2013  Technical  Corrigendum  1  applied.)  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.unix.org/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 .