| #include <unistd.h> |
| #include <limits.h> |
| #include <errno.h> |
| #include <sys/resource.h> |
| #include <signal.h> |
| #include <sys/sysinfo.h> |
| #include "syscall.h" |
| #include "libc.h" |
| |
| #define JT(x) (-256|(x)) |
| #define VER JT(1) |
| #define JT_ARG_MAX JT(2) |
| #define JT_MQ_PRIO_MAX JT(3) |
| #define JT_PAGE_SIZE JT(4) |
| #define JT_SEM_VALUE_MAX JT(5) |
| #define JT_NPROCESSORS_CONF JT(6) |
| #define JT_NPROCESSORS_ONLN JT(7) |
| #define JT_PHYS_PAGES JT(8) |
| #define JT_AVPHYS_PAGES JT(9) |
| #define JT_ZERO JT(10) |
| |
| #define RLIM(x) (-32768|(RLIMIT_ ## x)) |
| |
| long sysconf(int name) |
| { |
| static const short values[] = { |
| [_SC_ARG_MAX] = JT_ARG_MAX, |
| [_SC_CHILD_MAX] = RLIM(NPROC), |
| [_SC_CLK_TCK] = 100, |
| [_SC_NGROUPS_MAX] = 32, |
| [_SC_OPEN_MAX] = RLIM(NOFILE), |
| [_SC_STREAM_MAX] = -1, |
| [_SC_TZNAME_MAX] = TZNAME_MAX, |
| [_SC_JOB_CONTROL] = 1, |
| [_SC_SAVED_IDS] = 1, |
| [_SC_REALTIME_SIGNALS] = 1, |
| [_SC_PRIORITY_SCHEDULING] = -1, |
| [_SC_TIMERS] = VER, |
| [_SC_ASYNCHRONOUS_IO] = VER, |
| [_SC_PRIORITIZED_IO] = -1, |
| [_SC_SYNCHRONIZED_IO] = -1, |
| [_SC_FSYNC] = VER, |
| [_SC_MAPPED_FILES] = VER, |
| [_SC_MEMLOCK] = VER, |
| [_SC_MEMLOCK_RANGE] = VER, |
| [_SC_MEMORY_PROTECTION] = VER, |
| [_SC_MESSAGE_PASSING] = VER, |
| [_SC_SEMAPHORES] = VER, |
| [_SC_SHARED_MEMORY_OBJECTS] = VER, |
| [_SC_AIO_LISTIO_MAX] = -1, |
| [_SC_AIO_MAX] = -1, |
| [_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */ |
| [_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX, |
| [_SC_MQ_OPEN_MAX] = -1, |
| [_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX, |
| [_SC_VERSION] = VER, |
| [_SC_PAGE_SIZE] = JT_PAGE_SIZE, |
| [_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3, |
| [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX, |
| [_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX, |
| [_SC_SIGQUEUE_MAX] = -1, |
| [_SC_TIMER_MAX] = -1, |
| [_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX, |
| [_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX, |
| [_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX, |
| [_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX, |
| [_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX, |
| [_SC_EXPR_NEST_MAX] = -1, |
| [_SC_LINE_MAX] = -1, |
| [_SC_RE_DUP_MAX] = RE_DUP_MAX, |
| [_SC_2_VERSION] = VER, |
| [_SC_2_C_BIND] = VER, |
| [_SC_2_C_DEV] = -1, |
| [_SC_2_FORT_DEV] = -1, |
| [_SC_2_FORT_RUN] = -1, |
| [_SC_2_SW_DEV] = -1, |
| [_SC_2_LOCALEDEF] = -1, |
| [_SC_IOV_MAX] = IOV_MAX, |
| [_SC_THREADS] = VER, |
| [_SC_THREAD_SAFE_FUNCTIONS] = VER, |
| [_SC_GETGR_R_SIZE_MAX] = -1, |
| [_SC_GETPW_R_SIZE_MAX] = -1, |
| [_SC_LOGIN_NAME_MAX] = 256, |
| [_SC_TTY_NAME_MAX] = TTY_NAME_MAX, |
| [_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIONS, |
| [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX, |
| [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN, |
| [_SC_THREAD_THREADS_MAX] = -1, |
| [_SC_THREAD_ATTR_STACKADDR] = VER, |
| [_SC_THREAD_ATTR_STACKSIZE] = VER, |
| [_SC_THREAD_PRIORITY_SCHEDULING] = VER, |
| [_SC_THREAD_PRIO_INHERIT] = -1, |
| [_SC_THREAD_PRIO_PROTECT] = -1, |
| [_SC_THREAD_PROCESS_SHARED] = VER, |
| [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF, |
| [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN, |
| [_SC_PHYS_PAGES] = JT_PHYS_PAGES, |
| [_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES, |
| [_SC_ATEXIT_MAX] = -1, |
| [_SC_PASS_MAX] = -1, |
| [_SC_XOPEN_VERSION] = _XOPEN_VERSION, |
| [_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION, |
| [_SC_XOPEN_UNIX] = 1, |
| [_SC_XOPEN_CRYPT] = -1, |
| [_SC_XOPEN_ENH_I18N] = 1, |
| [_SC_XOPEN_SHM] = 1, |
| [_SC_2_CHAR_TERM] = -1, |
| [_SC_2_UPE] = -1, |
| [_SC_XOPEN_XPG2] = -1, |
| [_SC_XOPEN_XPG3] = -1, |
| [_SC_XOPEN_XPG4] = -1, |
| [_SC_NZERO] = NZERO, |
| [_SC_XBS5_ILP32_OFF32] = -1, |
| [_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| [_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| [_SC_XBS5_LPBIG_OFFBIG] = -1, |
| [_SC_XOPEN_LEGACY] = -1, |
| [_SC_XOPEN_REALTIME] = -1, |
| [_SC_XOPEN_REALTIME_THREADS] = -1, |
| [_SC_ADVISORY_INFO] = VER, |
| [_SC_BARRIERS] = VER, |
| [_SC_CLOCK_SELECTION] = VER, |
| [_SC_CPUTIME] = VER, |
| [_SC_THREAD_CPUTIME] = VER, |
| [_SC_MONOTONIC_CLOCK] = VER, |
| [_SC_READER_WRITER_LOCKS] = VER, |
| [_SC_SPIN_LOCKS] = VER, |
| [_SC_REGEXP] = 1, |
| [_SC_SHELL] = 1, |
| [_SC_SPAWN] = VER, |
| [_SC_SPORADIC_SERVER] = -1, |
| [_SC_THREAD_SPORADIC_SERVER] = -1, |
| [_SC_TIMEOUTS] = VER, |
| [_SC_TYPED_MEMORY_OBJECTS] = -1, |
| [_SC_2_PBS] = -1, |
| [_SC_2_PBS_ACCOUNTING] = -1, |
| [_SC_2_PBS_LOCATE] = -1, |
| [_SC_2_PBS_MESSAGE] = -1, |
| [_SC_2_PBS_TRACK] = -1, |
| [_SC_SYMLOOP_MAX] = SYMLOOP_MAX, |
| [_SC_STREAMS] = JT_ZERO, |
| [_SC_2_PBS_CHECKPOINT] = -1, |
| [_SC_V6_ILP32_OFF32] = -1, |
| [_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| [_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| [_SC_V6_LPBIG_OFFBIG] = -1, |
| [_SC_HOST_NAME_MAX] = HOST_NAME_MAX, |
| [_SC_TRACE] = -1, |
| [_SC_TRACE_EVENT_FILTER] = -1, |
| [_SC_TRACE_INHERIT] = -1, |
| [_SC_TRACE_LOG] = -1, |
| |
| [_SC_IPV6] = VER, |
| [_SC_RAW_SOCKETS] = VER, |
| [_SC_V7_ILP32_OFF32] = -1, |
| [_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| [_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| [_SC_V7_LPBIG_OFFBIG] = -1, |
| [_SC_SS_REPL_MAX] = -1, |
| [_SC_TRACE_EVENT_NAME_MAX] = -1, |
| [_SC_TRACE_NAME_MAX] = -1, |
| [_SC_TRACE_SYS_MAX] = -1, |
| [_SC_TRACE_USER_EVENT_MAX] = -1, |
| [_SC_XOPEN_STREAMS] = JT_ZERO, |
| [_SC_THREAD_ROBUST_PRIO_INHERIT] = -1, |
| [_SC_THREAD_ROBUST_PRIO_PROTECT] = -1, |
| }; |
| |
| if (name >= sizeof(values)/sizeof(values[0]) || !values[name]) { |
| errno = EINVAL; |
| return -1; |
| } else if (values[name] >= -1) { |
| return values[name]; |
| } else if (values[name] < -256) { |
| struct rlimit lim; |
| getrlimit(values[name]&16383, &lim); |
| return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur; |
| } |
| |
| switch ((unsigned char)values[name]) { |
| case VER & 255: |
| return _POSIX_VERSION; |
| case JT_ARG_MAX & 255: |
| return ARG_MAX; |
| case JT_MQ_PRIO_MAX & 255: |
| return MQ_PRIO_MAX; |
| case JT_PAGE_SIZE & 255: |
| return PAGE_SIZE; |
| case JT_SEM_VALUE_MAX & 255: |
| return SEM_VALUE_MAX; |
| case JT_NPROCESSORS_CONF & 255: |
| case JT_NPROCESSORS_ONLN & 255: ; |
| unsigned char set[128] = {1}; |
| int i, cnt; |
| __syscall(SYS_sched_getaffinity, 0, sizeof set, set); |
| for (i=cnt=0; i<sizeof set; i++) |
| for (; set[i]; set[i]&=set[i]-1, cnt++); |
| return cnt; |
| case JT_PHYS_PAGES & 255: |
| case JT_AVPHYS_PAGES & 255: ; |
| unsigned long long mem; |
| int __lsysinfo(struct sysinfo *); |
| struct sysinfo si; |
| __lsysinfo(&si); |
| if (!si.mem_unit) si.mem_unit = 1; |
| if (name==_SC_PHYS_PAGES) mem = si.totalram; |
| else mem = si.freeram + si.bufferram; |
| mem *= si.mem_unit; |
| mem /= PAGE_SIZE; |
| return (mem > LONG_MAX) ? LONG_MAX : mem; |
| case JT_ZERO & 255: |
| return 0; |
| } |
| return values[name]; |
| } |