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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Get Configurable System Variables |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2007. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <time.h> |
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22 | #include <unistd.h> |
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23 | #include <errno.h> |
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24 | |
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25 | #include <rtems.h> |
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26 | #include <rtems/seterr.h> |
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27 | #include <rtems/libio_.h> |
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28 | |
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29 | #include <sys/param.h> |
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30 | |
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31 | /* |
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32 | * 4.8.1 Get Configurable System Variables, P1003.1b-1993, p. 95 |
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33 | */ |
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34 | |
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35 | long sysconf( |
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36 | int name |
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37 | ) |
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38 | { |
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39 | switch ( name ) { |
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40 | case _SC_CLK_TCK: |
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41 | return (long) rtems_clock_get_ticks_per_second(); |
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42 | case _SC_OPEN_MAX: |
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43 | return rtems_libio_number_iops; |
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44 | case _SC_GETPW_R_SIZE_MAX: |
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45 | return 1024; |
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46 | case _SC_PAGESIZE: |
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47 | return PAGE_SIZE; |
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48 | case _SC_SYMLOOP_MAX: |
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49 | return RTEMS_FILESYSTEM_SYMLOOP_MAX; |
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50 | case _SC_NPROCESSORS_CONF: |
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51 | return (long) rtems_configuration_get_maximum_processors(); |
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52 | case _SC_NPROCESSORS_ONLN: |
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53 | return (long) rtems_get_processor_count(); |
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54 | case _SC_POSIX_26_VERSION: |
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55 | return (long) _POSIX_26_VERSION; |
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56 | #if defined(__sparc__) |
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57 | case 515: /* Solaris _SC_STACK_PROT */ |
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58 | return 0; |
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59 | #endif |
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60 | default: |
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61 | rtems_set_errno_and_return_minus_one( EINVAL ); |
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62 | } |
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63 | } |
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