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| 1 #include <unistd.h> |
| 2 #include <limits.h> |
| 3 #include <errno.h> |
| 4 #include <sys/resource.h> |
| 5 #include <signal.h> |
| 6 #include <sys/sysinfo.h> |
| 7 #include "syscall.h" |
| 8 #include "libc.h" |
| 9 |
| 10 #define JT(x) (-256|(x)) |
| 11 #define VER JT(1) |
| 12 #define JT_ARG_MAX JT(2) |
| 13 #define JT_MQ_PRIO_MAX JT(3) |
| 14 #define JT_PAGE_SIZE JT(4) |
| 15 #define JT_SEM_VALUE_MAX JT(5) |
| 16 #define JT_NPROCESSORS_CONF JT(6) |
| 17 #define JT_NPROCESSORS_ONLN JT(7) |
| 18 #define JT_PHYS_PAGES JT(8) |
| 19 #define JT_AVPHYS_PAGES JT(9) |
| 20 #define JT_ZERO JT(10) |
| 21 |
| 22 #define RLIM(x) (-32768|(RLIMIT_ ## x)) |
| 23 |
| 24 long sysconf(int name) |
| 25 { |
| 26 static const short values[] = { |
| 27 [_SC_ARG_MAX] = JT_ARG_MAX, |
| 28 [_SC_CHILD_MAX] = RLIM(NPROC), |
| 29 [_SC_CLK_TCK] = 100, |
| 30 [_SC_NGROUPS_MAX] = 32, |
| 31 [_SC_OPEN_MAX] = RLIM(NOFILE), |
| 32 [_SC_STREAM_MAX] = -1, |
| 33 [_SC_TZNAME_MAX] = TZNAME_MAX, |
| 34 [_SC_JOB_CONTROL] = 1, |
| 35 [_SC_SAVED_IDS] = 1, |
| 36 [_SC_REALTIME_SIGNALS] = 1, |
| 37 [_SC_PRIORITY_SCHEDULING] = -1, |
| 38 [_SC_TIMERS] = VER, |
| 39 [_SC_ASYNCHRONOUS_IO] = VER, |
| 40 [_SC_PRIORITIZED_IO] = -1, |
| 41 [_SC_SYNCHRONIZED_IO] = -1, |
| 42 [_SC_FSYNC] = VER, |
| 43 [_SC_MAPPED_FILES] = VER, |
| 44 [_SC_MEMLOCK] = VER, |
| 45 [_SC_MEMLOCK_RANGE] = VER, |
| 46 [_SC_MEMORY_PROTECTION] = VER, |
| 47 [_SC_MESSAGE_PASSING] = VER, |
| 48 [_SC_SEMAPHORES] = VER, |
| 49 [_SC_SHARED_MEMORY_OBJECTS] = VER, |
| 50 [_SC_AIO_LISTIO_MAX] = -1, |
| 51 [_SC_AIO_MAX] = -1, |
| 52 [_SC_AIO_PRIO_DELTA_MAX] = JT_ZERO, /* ?? */ |
| 53 [_SC_DELAYTIMER_MAX] = _POSIX_DELAYTIMER_MAX, |
| 54 [_SC_MQ_OPEN_MAX] = -1, |
| 55 [_SC_MQ_PRIO_MAX] = JT_MQ_PRIO_MAX, |
| 56 [_SC_VERSION] = VER, |
| 57 [_SC_PAGE_SIZE] = JT_PAGE_SIZE, |
| 58 [_SC_RTSIG_MAX] = _NSIG - 1 - 31 - 3, |
| 59 [_SC_SEM_NSEMS_MAX] = SEM_NSEMS_MAX, |
| 60 [_SC_SEM_VALUE_MAX] = JT_SEM_VALUE_MAX, |
| 61 [_SC_SIGQUEUE_MAX] = -1, |
| 62 [_SC_TIMER_MAX] = -1, |
| 63 [_SC_BC_BASE_MAX] = _POSIX2_BC_BASE_MAX, |
| 64 [_SC_BC_DIM_MAX] = _POSIX2_BC_DIM_MAX, |
| 65 [_SC_BC_SCALE_MAX] = _POSIX2_BC_SCALE_MAX, |
| 66 [_SC_BC_STRING_MAX] = _POSIX2_BC_STRING_MAX, |
| 67 [_SC_COLL_WEIGHTS_MAX] = COLL_WEIGHTS_MAX, |
| 68 [_SC_EXPR_NEST_MAX] = -1, |
| 69 [_SC_LINE_MAX] = -1, |
| 70 [_SC_RE_DUP_MAX] = RE_DUP_MAX, |
| 71 [_SC_2_VERSION] = VER, |
| 72 [_SC_2_C_BIND] = VER, |
| 73 [_SC_2_C_DEV] = -1, |
| 74 [_SC_2_FORT_DEV] = -1, |
| 75 [_SC_2_FORT_RUN] = -1, |
| 76 [_SC_2_SW_DEV] = -1, |
| 77 [_SC_2_LOCALEDEF] = -1, |
| 78 [_SC_IOV_MAX] = IOV_MAX, |
| 79 [_SC_THREADS] = VER, |
| 80 [_SC_THREAD_SAFE_FUNCTIONS] = VER, |
| 81 [_SC_GETGR_R_SIZE_MAX] = -1, |
| 82 [_SC_GETPW_R_SIZE_MAX] = -1, |
| 83 [_SC_LOGIN_NAME_MAX] = 256, |
| 84 [_SC_TTY_NAME_MAX] = TTY_NAME_MAX, |
| 85 [_SC_THREAD_DESTRUCTOR_ITERATIONS] = PTHREAD_DESTRUCTOR_ITERATIO
NS, |
| 86 [_SC_THREAD_KEYS_MAX] = PTHREAD_KEYS_MAX, |
| 87 [_SC_THREAD_STACK_MIN] = PTHREAD_STACK_MIN, |
| 88 [_SC_THREAD_THREADS_MAX] = -1, |
| 89 [_SC_THREAD_ATTR_STACKADDR] = VER, |
| 90 [_SC_THREAD_ATTR_STACKSIZE] = VER, |
| 91 [_SC_THREAD_PRIORITY_SCHEDULING] = VER, |
| 92 [_SC_THREAD_PRIO_INHERIT] = -1, |
| 93 [_SC_THREAD_PRIO_PROTECT] = -1, |
| 94 [_SC_THREAD_PROCESS_SHARED] = VER, |
| 95 [_SC_NPROCESSORS_CONF] = JT_NPROCESSORS_CONF, |
| 96 [_SC_NPROCESSORS_ONLN] = JT_NPROCESSORS_ONLN, |
| 97 [_SC_PHYS_PAGES] = JT_PHYS_PAGES, |
| 98 [_SC_AVPHYS_PAGES] = JT_AVPHYS_PAGES, |
| 99 [_SC_ATEXIT_MAX] = -1, |
| 100 [_SC_PASS_MAX] = -1, |
| 101 [_SC_XOPEN_VERSION] = _XOPEN_VERSION, |
| 102 [_SC_XOPEN_XCU_VERSION] = _XOPEN_VERSION, |
| 103 [_SC_XOPEN_UNIX] = 1, |
| 104 [_SC_XOPEN_CRYPT] = -1, |
| 105 [_SC_XOPEN_ENH_I18N] = 1, |
| 106 [_SC_XOPEN_SHM] = 1, |
| 107 [_SC_2_CHAR_TERM] = -1, |
| 108 [_SC_2_UPE] = -1, |
| 109 [_SC_XOPEN_XPG2] = -1, |
| 110 [_SC_XOPEN_XPG3] = -1, |
| 111 [_SC_XOPEN_XPG4] = -1, |
| 112 [_SC_NZERO] = NZERO, |
| 113 [_SC_XBS5_ILP32_OFF32] = -1, |
| 114 [_SC_XBS5_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| 115 [_SC_XBS5_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| 116 [_SC_XBS5_LPBIG_OFFBIG] = -1, |
| 117 [_SC_XOPEN_LEGACY] = -1, |
| 118 [_SC_XOPEN_REALTIME] = -1, |
| 119 [_SC_XOPEN_REALTIME_THREADS] = -1, |
| 120 [_SC_ADVISORY_INFO] = VER, |
| 121 [_SC_BARRIERS] = VER, |
| 122 [_SC_CLOCK_SELECTION] = VER, |
| 123 [_SC_CPUTIME] = VER, |
| 124 [_SC_THREAD_CPUTIME] = VER, |
| 125 [_SC_MONOTONIC_CLOCK] = VER, |
| 126 [_SC_READER_WRITER_LOCKS] = VER, |
| 127 [_SC_SPIN_LOCKS] = VER, |
| 128 [_SC_REGEXP] = 1, |
| 129 [_SC_SHELL] = 1, |
| 130 [_SC_SPAWN] = VER, |
| 131 [_SC_SPORADIC_SERVER] = -1, |
| 132 [_SC_THREAD_SPORADIC_SERVER] = -1, |
| 133 [_SC_TIMEOUTS] = VER, |
| 134 [_SC_TYPED_MEMORY_OBJECTS] = -1, |
| 135 [_SC_2_PBS] = -1, |
| 136 [_SC_2_PBS_ACCOUNTING] = -1, |
| 137 [_SC_2_PBS_LOCATE] = -1, |
| 138 [_SC_2_PBS_MESSAGE] = -1, |
| 139 [_SC_2_PBS_TRACK] = -1, |
| 140 [_SC_SYMLOOP_MAX] = SYMLOOP_MAX, |
| 141 [_SC_STREAMS] = JT_ZERO, |
| 142 [_SC_2_PBS_CHECKPOINT] = -1, |
| 143 [_SC_V6_ILP32_OFF32] = -1, |
| 144 [_SC_V6_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| 145 [_SC_V6_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| 146 [_SC_V6_LPBIG_OFFBIG] = -1, |
| 147 [_SC_HOST_NAME_MAX] = HOST_NAME_MAX, |
| 148 [_SC_TRACE] = -1, |
| 149 [_SC_TRACE_EVENT_FILTER] = -1, |
| 150 [_SC_TRACE_INHERIT] = -1, |
| 151 [_SC_TRACE_LOG] = -1, |
| 152 |
| 153 [_SC_IPV6] = VER, |
| 154 [_SC_RAW_SOCKETS] = VER, |
| 155 [_SC_V7_ILP32_OFF32] = -1, |
| 156 [_SC_V7_ILP32_OFFBIG] = sizeof(long)==4 ? 1 : JT_ZERO, |
| 157 [_SC_V7_LP64_OFF64] = sizeof(long)==8 ? 1 : JT_ZERO, |
| 158 [_SC_V7_LPBIG_OFFBIG] = -1, |
| 159 [_SC_SS_REPL_MAX] = -1, |
| 160 [_SC_TRACE_EVENT_NAME_MAX] = -1, |
| 161 [_SC_TRACE_NAME_MAX] = -1, |
| 162 [_SC_TRACE_SYS_MAX] = -1, |
| 163 [_SC_TRACE_USER_EVENT_MAX] = -1, |
| 164 [_SC_XOPEN_STREAMS] = JT_ZERO, |
| 165 [_SC_THREAD_ROBUST_PRIO_INHERIT] = -1, |
| 166 [_SC_THREAD_ROBUST_PRIO_PROTECT] = -1, |
| 167 }; |
| 168 |
| 169 if (name >= sizeof(values)/sizeof(values[0]) || !values[name]) { |
| 170 errno = EINVAL; |
| 171 return -1; |
| 172 } else if (values[name] >= -1) { |
| 173 return values[name]; |
| 174 } else if (values[name] < -256) { |
| 175 struct rlimit lim; |
| 176 getrlimit(values[name]&16383, &lim); |
| 177 return lim.rlim_cur > LONG_MAX ? LONG_MAX : lim.rlim_cur; |
| 178 } |
| 179 |
| 180 switch ((unsigned char)values[name]) { |
| 181 case VER & 255: |
| 182 return _POSIX_VERSION; |
| 183 case JT_ARG_MAX & 255: |
| 184 return ARG_MAX; |
| 185 case JT_MQ_PRIO_MAX & 255: |
| 186 return MQ_PRIO_MAX; |
| 187 case JT_PAGE_SIZE & 255: |
| 188 return PAGE_SIZE; |
| 189 case JT_SEM_VALUE_MAX & 255: |
| 190 return SEM_VALUE_MAX; |
| 191 case JT_NPROCESSORS_CONF & 255: |
| 192 case JT_NPROCESSORS_ONLN & 255: ; |
| 193 unsigned char set[128] = {1}; |
| 194 int i, cnt; |
| 195 __syscall(SYS_sched_getaffinity, 0, sizeof set, set); |
| 196 for (i=cnt=0; i<sizeof set; i++) |
| 197 for (; set[i]; set[i]&=set[i]-1, cnt++); |
| 198 return cnt; |
| 199 case JT_PHYS_PAGES & 255: |
| 200 case JT_AVPHYS_PAGES & 255: ; |
| 201 unsigned long long mem; |
| 202 int __lsysinfo(struct sysinfo *); |
| 203 struct sysinfo si; |
| 204 __lsysinfo(&si); |
| 205 if (!si.mem_unit) si.mem_unit = 1; |
| 206 if (name==_SC_PHYS_PAGES) mem = si.totalram; |
| 207 else mem = si.freeram + si.bufferram; |
| 208 mem *= si.mem_unit; |
| 209 mem /= PAGE_SIZE; |
| 210 return (mem > LONG_MAX) ? LONG_MAX : mem; |
| 211 case JT_ZERO & 255: |
| 212 return 0; |
| 213 } |
| 214 return values[name]; |
| 215 } |
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Chromium Code Reviews
Issue 1573973002:
Add a "fork" of musl as //fusl. (Closed)
Base URL: https://github.com/domokit/mojo.git@master