1 | /* |
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2 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
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3 | * unrestricted use provided that this legend is included on all tape |
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4 | * media and as a part of the software program in whole or part. Users |
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5 | * may copy or modify Sun RPC without charge, but are not authorized |
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6 | * to license or distribute it to anyone else except as part of a product or |
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7 | * program developed by the user. |
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8 | * |
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9 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
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10 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
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11 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
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12 | * |
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13 | * Sun RPC is provided with no support and without any obligation on the |
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14 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
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15 | * modification or enhancement. |
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16 | * |
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17 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
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18 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
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19 | * OR ANY PART THEREOF. |
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20 | * |
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21 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
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22 | * or profits or other special, indirect and consequential damages, even if |
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23 | * Sun has been advised of the possibility of such damages. |
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24 | * |
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25 | * Sun Microsystems, Inc. |
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26 | * 2550 Garcia Avenue |
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27 | * Mountain View, California 94043 |
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28 | */ |
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29 | |
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30 | #if defined(LIBC_SCCS) && !defined(lint) |
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31 | /*static char *sccsid = "from: @(#)rpc_dtablesize.c 1.2 87/08/11 Copyr 1987 Sun Micro";*/ |
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32 | /*static char *sccsid = "from: @(#)rpc_dtablesize.c 2.1 88/07/29 4.0 RPCSRC";*/ |
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33 | static char *rcsid = "$FreeBSD: src/lib/libc/rpc/rpc_dtablesize.c,v 1.10 1999/08/28 00:00:45 peter Exp $"; |
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34 | #endif |
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35 | |
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36 | #include <sys/types.h> |
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37 | #include <unistd.h> |
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38 | |
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39 | /* |
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40 | * Cache the result of getdtablesize(), so we don't have to do an |
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41 | * expensive system call every time. |
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42 | */ |
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43 | /* |
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44 | * XXX In FreeBSD 2.x, you can have the maximum number of open file |
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45 | * descriptors be greater than FD_SETSIZE (which us 256 by default). |
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46 | * |
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47 | * Since old programs tend to use this call to determine the first arg |
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48 | * for select(), having this return > FD_SETSIZE is a Bad Idea(TM)! |
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49 | */ |
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50 | int |
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51 | _rpc_dtablesize(void) |
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52 | { |
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53 | static int size; |
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54 | |
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55 | if (size == 0) { |
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56 | size = getdtablesize(); |
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57 | if (size > FD_SETSIZE) |
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58 | size = FD_SETSIZE; |
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59 | } |
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60 | return (size); |
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61 | } |
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