[352] | 1 | #include <unistd.h>
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| 2 | #include <limits.h>
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| 3 | #include <errno.h>
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| 4 | #include <sys/resource.h>
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| 5 | #include <signal.h>
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| 6 | #include <sys/sysinfo.h>
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| 7 | #include "syscall.h"
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| 8 | #include "libc.h"
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| 9 |
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| 10 | #define JT(x) (-256|(x))
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| 11 | #define VER JT(1)
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| 12 | #define JT_ARG_MAX JT(2)
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| 13 | #define JT_MQ_PRIO_MAX JT(3)
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| 14 | #define JT_PAGE_SIZE JT(4)
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| 15 | #define JT_SEM_VALUE_MAX JT(5)
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| 16 | #define JT_NPROCESSORS_CONF JT(6)
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| 17 | #define JT_NPROCESSORS_ONLN JT(7)
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| 18 | #define JT_PHYS_PAGES JT(8)
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| 19 | #define JT_AVPHYS_PAGES JT(9)
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| 20 | #define JT_ZERO JT(10)
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| 21 |
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| 22 | #define RLIM(x) (-32768|(RLIMIT_ ## x))
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| 23 |
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| 24 | long sysconf(int name)
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| 25 | {
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| 26 | static const short values[] = {
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| 27 | [_SC_ARG_MAX] = JT_ARG_MAX,
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| 28 | [_SC_CHILD_MAX] = RLIM(NPROC),
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| 29 | [_SC_CLK_TCK] = 100,
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| 30 | [_SC_NGROUPS_MAX] = 32,
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| 31 | [_SC_OPEN_MAX] = RLIM(NOFILE),
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| 32 | [_SC_STREAM_MAX] = -1,
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| 33 | [_SC_TZNAME_MAX] = TZNAME_MAX,
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| 34 | [_SC_JOB_CONTROL] = 1,
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| 35 | [_SC_SAVED_IDS] = 1,
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| 36 | [_SC_REALTIME_SIGNALS] = 1,
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| 37 | [_SC_PRIORITY_SCHEDULING] = -1,
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| 38 | [_SC_TIMERS] = VER,
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| 39 | [_SC_ASYNCHRONOUS_IO] = VER,
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| 40 | [_SC_PRIORITIZED_IO] = -1,
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| 41 | [_SC_SYNCHRONIZED_IO] = -1,
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| 42 | [_SC_FSYNC] = VER,
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| 43 | [_SC_MAPPED_FILES] = VER,
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| 44 | [_SC_MEMLOCK] = VER,
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| 45 | [_SC_MEMLOCK_RANGE] = VER,
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| 46 | [_SC_MEMORY_PROTECTION] = VER,
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| 47 | [_SC_MESSAGE_PASSING] = VER,
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| 48 | [_SC_SEMAPHORES] = VER,
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| 49 | [_SC_SHARED_MEMORY_OBJECTS] = VER,
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| 50 | [_SC_AIO_LISTIO_MAX] = -1,
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| 51 | [_SC_AIO_MAX] = -1,
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| 52 | [_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */
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| 53 | [_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX,
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| 54 | [_SC_MQ_OPEN_MAX] = -1,
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| 55 | [_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX,
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| 56 | [_SC_VERSION] = VER,
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| 57 | [_SC_PAGE_SIZE] = JT_PAGE_SIZE,
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| 58 | [_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3,
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| 59 | [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX,
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| 60 | [_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX,
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| 61 | [_SC_SIGQUEUE_MAX] = -1,
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| 62 | [_SC_TIMER_MAX] = -1,
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| 63 | [_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX,
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| 64 | [_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX,
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| 65 | [_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX,
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| 66 | [_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX,
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| 67 | [_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX,
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| 68 | [_SC_EXPR_NEST_MAX] = -1,
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| 69 | [_SC_LINE_MAX] = -1,
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| 70 | [_SC_RE_DUP_MAX] = RE_DUP_MAX,
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| 71 | [_SC_2_VERSION] = VER,
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| 72 | [_SC_2_C_BIND] = VER,
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| 73 | [_SC_2_C_DEV] = -1,
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| 74 | [_SC_2_FORT_DEV] = -1,
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| 75 | [_SC_2_FORT_RUN] = -1,
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| 76 | [_SC_2_SW_DEV] = -1,
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| 77 | [_SC_2_LOCALEDEF] = -1,
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| 78 | [_SC_IOV_MAX] = IOV_MAX,
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| 79 | [_SC_THREADS] = VER,
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| 80 | [_SC_THREAD_SAFE_FUNCTIONS] = VER,
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| 81 | [_SC_GETGR_R_SIZE_MAX] = -1,
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| 82 | [_SC_GETPW_R_SIZE_MAX] = -1,
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| 83 | [_SC_LOGIN_NAME_MAX] = 256,
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| 84 | [_SC_TTY_NAME_MAX] = TTY_NAME_MAX,
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| 85 | [_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS,
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| 86 | [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX,
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| 87 | [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN,
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| 88 | [_SC_THREAD_THREADS_MAX] = -1,
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| 89 | [_SC_THREAD_ATTR_STACKADDR] = VER,
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| 90 | [_SC_THREAD_ATTR_STACKSIZE] = VER,
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| 91 | [_SC_THREAD_PRIORITY_SCHEDULING] = VER,
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| 92 | [_SC_THREAD_PRIO_INHERIT] = -1,
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| 93 | [_SC_THREAD_PRIO_PROTECT] = -1,
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| 94 | [_SC_THREAD_PROCESS_SHARED] = VER,
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| 95 | [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF,
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| 96 | [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN,
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| 97 | [_SC_PHYS_PAGES] = JT_PHYS_PAGES,
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| 98 | [_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES,
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| 99 | [_SC_ATEXIT_MAX] = -1,
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| 100 | [_SC_PASS_MAX] = -1,
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| 101 | [_SC_XOPEN_VERSION] = _XOPEN_VERSION,
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| 102 | [_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION,
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| 103 | [_SC_XOPEN_UNIX] = 1,
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| 104 | [_SC_XOPEN_CRYPT] = -1,
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| 105 | [_SC_XOPEN_ENH_I18N] = 1,
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| 106 | [_SC_XOPEN_SHM] = 1,
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| 107 | [_SC_2_CHAR_TERM] = -1,
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| 108 | [_SC_2_UPE] = -1,
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| 109 | [_SC_XOPEN_XPG2] = -1,
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| 110 | [_SC_XOPEN_XPG3] = -1,
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| 111 | [_SC_XOPEN_XPG4] = -1,
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| 112 | [_SC_NZERO] = NZERO,
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| 113 | [_SC_XBS5_ILP32_OFF32] = -1,
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| 114 | [_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO,
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| 115 | [_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO,
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| 116 | [_SC_XBS5_LPBIG_OFFBIG] = -1,
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| 117 | [_SC_XOPEN_LEGACY] = -1,
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| 118 | [_SC_XOPEN_REALTIME] = -1,
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| 119 | [_SC_XOPEN_REALTIME_THREADS] = -1,
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| 120 | [_SC_ADVISORY_INFO] = VER,
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| 121 | [_SC_BARRIERS] = VER,
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| 122 | [_SC_CLOCK_SELECTION] = VER,
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| 123 | [_SC_CPUTIME] = VER,
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| 124 | [_SC_THREAD_CPUTIME] = VER,
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| 125 | [_SC_MONOTONIC_CLOCK] = VER,
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| 126 | [_SC_READER_WRITER_LOCKS] = VER,
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| 127 | [_SC_SPIN_LOCKS] = VER,
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| 128 | [_SC_REGEXP] = 1,
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| 129 | [_SC_SHELL] = 1,
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| 130 | [_SC_SPAWN] = VER,
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| 131 | [_SC_SPORADIC_SERVER] = -1,
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| 132 | [_SC_THREAD_SPORADIC_SERVER] = -1,
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| 133 | [_SC_TIMEOUTS] = VER,
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| 134 | [_SC_TYPED_MEMORY_OBJECTS] = -1,
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| 135 | [_SC_2_PBS] = -1,
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| 136 | [_SC_2_PBS_ACCOUNTING] = -1,
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| 137 | [_SC_2_PBS_LOCATE] = -1,
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| 138 | [_SC_2_PBS_MESSAGE] = -1,
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| 139 | [_SC_2_PBS_TRACK] = -1,
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| 140 | [_SC_SYMLOOP_MAX] = SYMLOOP_MAX,
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| 141 | [_SC_STREAMS] = JT_ZERO,
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| 142 | [_SC_2_PBS_CHECKPOINT] = -1,
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| 143 | [_SC_V6_ILP32_OFF32] = -1,
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| 144 | [_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO,
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| 145 | [_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO,
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| 146 | [_SC_V6_LPBIG_OFFBIG] = -1,
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| 147 | [_SC_HOST_NAME_MAX] = HOST_NAME_MAX,
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| 148 | [_SC_TRACE] = -1,
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| 149 | [_SC_TRACE_EVENT_FILTER] = -1,
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| 150 | [_SC_TRACE_INHERIT] = -1,
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| 151 | [_SC_TRACE_LOG] = -1,
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| 152 |
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| 153 | [_SC_IPV6] = VER,
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| 154 | [_SC_RAW_SOCKETS] = VER,
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| 155 | [_SC_V7_ILP32_OFF32] = -1,
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| 156 | [_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO,
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| 157 | [_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO,
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| 158 | [_SC_V7_LPBIG_OFFBIG] = -1,
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| 159 | [_SC_SS_REPL_MAX] = -1,
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| 160 | [_SC_TRACE_EVENT_NAME_MAX] = -1,
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| 161 | [_SC_TRACE_NAME_MAX] = -1,
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| 162 | [_SC_TRACE_SYS_MAX] = -1,
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| 163 | [_SC_TRACE_USER_EVENT_MAX] = -1,
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| 164 | [_SC_XOPEN_STREAMS] = JT_ZERO,
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| 165 | [_SC_THREAD_ROBUST_PRIO_INHERIT] = -1,
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| 166 | [_SC_THREAD_ROBUST_PRIO_PROTECT] = -1,
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| 167 | };
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| 168 |
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| 169 | if (name >= sizeof(values)/sizeof(values[0]) || !values[name]) {
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| 170 | errno = EINVAL;
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| 171 | return -1;
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| 172 | } else if (values[name] >= -1) {
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| 173 | return values[name];
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| 174 | } else if (values[name] < -256) {
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| 175 | struct rlimit lim;
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| 176 | getrlimit(values[name]&16383, &lim);
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| 177 | return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur;
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| 178 | }
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| 179 |
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| 180 | switch ((unsigned char)values[name]) {
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| 181 | case VER & 255:
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| 182 | return _POSIX_VERSION;
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| 183 | case JT_ARG_MAX & 255:
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| 184 | return ARG_MAX;
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| 185 | case JT_MQ_PRIO_MAX & 255:
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| 186 | return MQ_PRIO_MAX;
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| 187 | case JT_PAGE_SIZE & 255:
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| 188 | return PAGE_SIZE;
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| 189 | case JT_SEM_VALUE_MAX & 255:
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| 190 | return SEM_VALUE_MAX;
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| 191 | case JT_NPROCESSORS_CONF & 255:
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| 192 | case JT_NPROCESSORS_ONLN & 255: ;
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| 193 | unsigned char set[128] = {1};
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| 194 | int i, cnt;
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| 195 | __syscall(SYS_sched_getaffinity, 0, sizeof set, set);
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| 196 | for (i=cnt=0; i<sizeof set; i++)
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| 197 | for (; set[i]; set[i]&=set[i]-1, cnt++);
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| 198 | return cnt;
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| 199 | case JT_PHYS_PAGES & 255:
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| 200 | case JT_AVPHYS_PAGES & 255: ;
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| 201 | unsigned long long mem;
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| 202 | int __lsysinfo(struct sysinfo *);
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| 203 | struct sysinfo si;
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| 204 | __lsysinfo(&si);
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| 205 | if (!si.mem_unit) si.mem_unit = 1;
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| 206 | if (name==_SC_PHYS_PAGES) mem = si.totalram;
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| 207 | else mem = si.freeram + si.bufferram;
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| 208 | mem *= si.mem_unit;
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| 209 | mem /= PAGE_SIZE;
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| 210 | return (mem > LONG_MAX) ? LONG_MAX : mem;
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| 211 | case JT_ZERO & 255:
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| 212 | return 0;
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| 213 | }
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| 214 | return values[name];
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| 215 | }
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