exit(3posix)


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.12008
   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.12008, <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 .





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