1 | /* |
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2 | * Copyright (c) 1990 Regents of the University of California. |
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3 | * All rights reserved. |
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4 | * |
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5 | * %sccs.include.redist.c% |
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6 | */ |
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7 | |
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8 | /* |
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9 | FUNCTION |
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10 | <<exit>>---end program execution |
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11 | |
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12 | INDEX |
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13 | exit |
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14 | |
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15 | SYNOPSIS |
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16 | #include <stdlib.h> |
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17 | void exit(int <[code]>); |
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18 | |
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19 | DESCRIPTION |
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20 | Use <<exit>> to return control from a program to the host operating |
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21 | environment. Use the argument <[code]> to pass an exit status to the |
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22 | operating environment: two particular values, <<EXIT_SUCCESS>> and |
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23 | <<EXIT_FAILURE>>, are defined in `<<stdlib.h>>' to indicate success or |
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24 | failure in a portable fashion. |
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25 | |
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26 | <<exit>> does two kinds of cleanup before ending execution of your |
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27 | program. First, it calls all application-defined cleanup functions |
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28 | you have enrolled with <<atexit>>. Second, files and streams are |
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29 | cleaned up: any pending output is delivered to the host system, each |
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30 | open file or stream is closed, and files created by <<tmpfile>> are |
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31 | deleted. |
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32 | |
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33 | RETURNS |
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34 | <<exit>> does not return to its caller. |
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35 | |
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36 | PORTABILITY |
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37 | ANSI C requires <<exit>>, and specifies that <<EXIT_SUCCESS>> and |
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38 | <<EXIT_FAILURE>> must be defined. |
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39 | |
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40 | Supporting OS subroutines required: <<_exit>>. |
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41 | */ |
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42 | |
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43 | #include <stdlib.h> |
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44 | #include <unistd.h> /* for _exit() declaration */ |
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45 | #include <reent.h> |
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46 | #include "atexit.h" |
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47 | |
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48 | /* |
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49 | * Exit, flushing stdio buffers if necessary. |
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50 | */ |
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51 | |
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52 | void |
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53 | exit (int code) |
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54 | { |
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55 | #ifdef _LITE_EXIT |
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56 | /* Refer to comments in __atexit.c for more details of lite exit. */ |
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57 | void __call_exitprocs (int, void *)) __attribute__((weak); |
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58 | if (__call_exitprocs) |
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59 | #endif |
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60 | __call_exitprocs (code, NULL); |
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61 | |
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62 | if (_GLOBAL_REENT->__cleanup) |
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63 | (*_GLOBAL_REENT->__cleanup) (_GLOBAL_REENT); |
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64 | _exit (code); |
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65 | } |
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