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| 1 | /* sysconf.c POSIX 4.8.1
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| 2 | * long int sysconf(int name);
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| 3 | *
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| 4 | * POSIX allows some of the values in <limits.h> to be increased at
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| 5 | * run time. The sysconf() function allows such values to be checked
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| 6 | * at run time. MINIX does not use this facility - the run time
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| 7 | * limits are those given in <limits.h>.
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| 8 | */
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| 9 |
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| 10 | #include <lib.h>
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| 11 | #include <unistd.h>
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| 12 | #include <time.h>
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| 13 |
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| 14 | PUBLIC long int sysconf(name)
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| 15 | int name; /* property being inspected */
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| 16 | {
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| 17 | switch(name) {
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| 18 | case _SC_ARG_MAX:
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| 19 | return (long) ARG_MAX;
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| 20 |
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| 21 | case _SC_CHILD_MAX:
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| 22 | return (long) CHILD_MAX;
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| 23 |
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| 24 | case _SC_CLK_TCK:
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| 25 | return (long) CLOCKS_PER_SEC;
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| 26 |
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| 27 | case _SC_NGROUPS_MAX:
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| 28 | return (long) NGROUPS_MAX;
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| 29 |
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| 30 | case _SC_OPEN_MAX:
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| 31 | return (long) OPEN_MAX;
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| 32 |
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| 33 | case _SC_JOB_CONTROL:
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| 34 | return -1L; /* no job control */
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| 35 |
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| 36 | case _SC_SAVED_IDS:
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| 37 | return -1L; /* no saved uid/gid */
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| 38 |
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| 39 | case _SC_VERSION:
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| 40 | return (long) _POSIX_VERSION;
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| 41 |
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| 42 | case _SC_STREAM_MAX:
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| 43 | return (long) STREAM_MAX;
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| 44 |
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| 45 | case _SC_TZNAME_MAX:
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| 46 | return (long) TZNAME_MAX;
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| 47 |
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| 48 | case _SC_PAGESIZE:
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| 49 | return getpagesize();
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| 50 |
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| 51 | default:
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| 52 | errno = EINVAL;
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| 53 | return -1L;
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| 54 | }
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| 55 | }
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