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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package android.system;
     18 
     19 /**
     20  * Constants and helper functions for use with {@link Os}.
     21  */
     22 public final class OsConstants {
     23     private OsConstants() {
     24     }
     25 
     26     /**
     27      * Tests whether the given mode is a block device.
     28      */
     29     public static boolean S_ISBLK(int mode) { return (mode & S_IFMT) == S_IFBLK; }
     30 
     31     /**
     32      * Tests whether the given mode is a character device.
     33      */
     34     public static boolean S_ISCHR(int mode) { return (mode & S_IFMT) == S_IFCHR; }
     35 
     36     /**
     37      * Tests whether the given mode is a directory.
     38      */
     39     public static boolean S_ISDIR(int mode) { return (mode & S_IFMT) == S_IFDIR; }
     40 
     41     /**
     42      * Tests whether the given mode is a FIFO.
     43      */
     44     public static boolean S_ISFIFO(int mode) { return (mode & S_IFMT) == S_IFIFO; }
     45 
     46     /**
     47      * Tests whether the given mode is a regular file.
     48      */
     49     public static boolean S_ISREG(int mode) { return (mode & S_IFMT) == S_IFREG; }
     50 
     51     /**
     52      * Tests whether the given mode is a symbolic link.
     53      */
     54     public static boolean S_ISLNK(int mode) { return (mode & S_IFMT) == S_IFLNK; }
     55 
     56     /**
     57      * Tests whether the given mode is a socket.
     58      */
     59     public static boolean S_ISSOCK(int mode) { return (mode & S_IFMT) == S_IFSOCK; }
     60 
     61     /**
     62      * Extracts the exit status of a child. Only valid if WIFEXITED returns true.
     63      */
     64     public static int WEXITSTATUS(int status) { return (status & 0xff00) >> 8; }
     65 
     66     /**
     67      * Tests whether the child dumped core. Only valid if WIFSIGNALED returns true.
     68      */
     69     public static boolean WCOREDUMP(int status) { return (status & 0x80) != 0; }
     70 
     71     /**
     72      * Returns the signal that caused the child to exit. Only valid if WIFSIGNALED returns true.
     73      */
     74     public static int WTERMSIG(int status) { return status & 0x7f; }
     75 
     76     /**
     77      * Returns the signal that cause the child to stop. Only valid if WIFSTOPPED returns true.
     78      */
     79     public static int WSTOPSIG(int status) { return WEXITSTATUS(status); }
     80 
     81     /**
     82      * Tests whether the child exited normally.
     83      */
     84     public static boolean WIFEXITED(int status) { return (WTERMSIG(status) == 0); }
     85 
     86     /**
     87      * Tests whether the child was stopped (not terminated) by a signal.
     88      */
     89     public static boolean WIFSTOPPED(int status) { return (WTERMSIG(status) == 0x7f); }
     90 
     91     /**
     92      * Tests whether the child was terminated by a signal.
     93      */
     94     public static boolean WIFSIGNALED(int status) { return (WTERMSIG(status + 1) >= 2); }
     95 
     96     public static final int AF_INET = placeholder();
     97     public static final int AF_INET6 = placeholder();
     98     /** @hide */ public static final int AF_NETLINK = placeholder();
     99     /** @hide */ public static final int AF_PACKET = placeholder();
    100     public static final int AF_UNIX = placeholder();
    101     public static final int AF_UNSPEC = placeholder();
    102     public static final int AI_ADDRCONFIG = placeholder();
    103     public static final int AI_ALL = placeholder();
    104     public static final int AI_CANONNAME = placeholder();
    105     public static final int AI_NUMERICHOST = placeholder();
    106     public static final int AI_NUMERICSERV = placeholder();
    107     public static final int AI_PASSIVE = placeholder();
    108     public static final int AI_V4MAPPED = placeholder();
    109     /** @hide */ public static final int ARPHRD_ETHER = placeholder();
    110     /** @hide */ public static final int ARPHRD_LOOPBACK = placeholder();
    111     public static final int CAP_AUDIT_CONTROL = placeholder();
    112     public static final int CAP_AUDIT_WRITE = placeholder();
    113     public static final int CAP_BLOCK_SUSPEND = placeholder();
    114     public static final int CAP_CHOWN = placeholder();
    115     public static final int CAP_DAC_OVERRIDE = placeholder();
    116     public static final int CAP_DAC_READ_SEARCH = placeholder();
    117     public static final int CAP_FOWNER = placeholder();
    118     public static final int CAP_FSETID = placeholder();
    119     public static final int CAP_IPC_LOCK = placeholder();
    120     public static final int CAP_IPC_OWNER = placeholder();
    121     public static final int CAP_KILL = placeholder();
    122     public static final int CAP_LAST_CAP = placeholder();
    123     public static final int CAP_LEASE = placeholder();
    124     public static final int CAP_LINUX_IMMUTABLE = placeholder();
    125     public static final int CAP_MAC_ADMIN = placeholder();
    126     public static final int CAP_MAC_OVERRIDE = placeholder();
    127     public static final int CAP_MKNOD = placeholder();
    128     public static final int CAP_NET_ADMIN = placeholder();
    129     public static final int CAP_NET_BIND_SERVICE = placeholder();
    130     public static final int CAP_NET_BROADCAST = placeholder();
    131     public static final int CAP_NET_RAW = placeholder();
    132     public static final int CAP_SETFCAP = placeholder();
    133     public static final int CAP_SETGID = placeholder();
    134     public static final int CAP_SETPCAP = placeholder();
    135     public static final int CAP_SETUID = placeholder();
    136     public static final int CAP_SYS_ADMIN = placeholder();
    137     public static final int CAP_SYS_BOOT = placeholder();
    138     public static final int CAP_SYS_CHROOT = placeholder();
    139     public static final int CAP_SYSLOG = placeholder();
    140     public static final int CAP_SYS_MODULE = placeholder();
    141     public static final int CAP_SYS_NICE = placeholder();
    142     public static final int CAP_SYS_PACCT = placeholder();
    143     public static final int CAP_SYS_PTRACE = placeholder();
    144     public static final int CAP_SYS_RAWIO = placeholder();
    145     public static final int CAP_SYS_RESOURCE = placeholder();
    146     public static final int CAP_SYS_TIME = placeholder();
    147     public static final int CAP_SYS_TTY_CONFIG = placeholder();
    148     public static final int CAP_WAKE_ALARM = placeholder();
    149     public static final int E2BIG = placeholder();
    150     public static final int EACCES = placeholder();
    151     public static final int EADDRINUSE = placeholder();
    152     public static final int EADDRNOTAVAIL = placeholder();
    153     public static final int EAFNOSUPPORT = placeholder();
    154     public static final int EAGAIN = placeholder();
    155     public static final int EAI_AGAIN = placeholder();
    156     public static final int EAI_BADFLAGS = placeholder();
    157     public static final int EAI_FAIL = placeholder();
    158     public static final int EAI_FAMILY = placeholder();
    159     public static final int EAI_MEMORY = placeholder();
    160     public static final int EAI_NODATA = placeholder();
    161     public static final int EAI_NONAME = placeholder();
    162     public static final int EAI_OVERFLOW = placeholder();
    163     public static final int EAI_SERVICE = placeholder();
    164     public static final int EAI_SOCKTYPE = placeholder();
    165     public static final int EAI_SYSTEM = placeholder();
    166     public static final int EALREADY = placeholder();
    167     public static final int EBADF = placeholder();
    168     public static final int EBADMSG = placeholder();
    169     public static final int EBUSY = placeholder();
    170     public static final int ECANCELED = placeholder();
    171     public static final int ECHILD = placeholder();
    172     public static final int ECONNABORTED = placeholder();
    173     public static final int ECONNREFUSED = placeholder();
    174     public static final int ECONNRESET = placeholder();
    175     public static final int EDEADLK = placeholder();
    176     public static final int EDESTADDRREQ = placeholder();
    177     public static final int EDOM = placeholder();
    178     public static final int EDQUOT = placeholder();
    179     public static final int EEXIST = placeholder();
    180     public static final int EFAULT = placeholder();
    181     public static final int EFBIG = placeholder();
    182     public static final int EHOSTUNREACH = placeholder();
    183     public static final int EIDRM = placeholder();
    184     public static final int EILSEQ = placeholder();
    185     public static final int EINPROGRESS = placeholder();
    186     public static final int EINTR = placeholder();
    187     public static final int EINVAL = placeholder();
    188     public static final int EIO = placeholder();
    189     public static final int EISCONN = placeholder();
    190     public static final int EISDIR = placeholder();
    191     public static final int ELOOP = placeholder();
    192     public static final int EMFILE = placeholder();
    193     public static final int EMLINK = placeholder();
    194     public static final int EMSGSIZE = placeholder();
    195     public static final int EMULTIHOP = placeholder();
    196     public static final int ENAMETOOLONG = placeholder();
    197     public static final int ENETDOWN = placeholder();
    198     public static final int ENETRESET = placeholder();
    199     public static final int ENETUNREACH = placeholder();
    200     public static final int ENFILE = placeholder();
    201     public static final int ENOBUFS = placeholder();
    202     public static final int ENODATA = placeholder();
    203     public static final int ENODEV = placeholder();
    204     public static final int ENOENT = placeholder();
    205     public static final int ENOEXEC = placeholder();
    206     public static final int ENOLCK = placeholder();
    207     public static final int ENOLINK = placeholder();
    208     public static final int ENOMEM = placeholder();
    209     public static final int ENOMSG = placeholder();
    210     /** @hide */ public static final int ENONET = placeholder();
    211     public static final int ENOPROTOOPT = placeholder();
    212     public static final int ENOSPC = placeholder();
    213     public static final int ENOSR = placeholder();
    214     public static final int ENOSTR = placeholder();
    215     public static final int ENOSYS = placeholder();
    216     public static final int ENOTCONN = placeholder();
    217     public static final int ENOTDIR = placeholder();
    218     public static final int ENOTEMPTY = placeholder();
    219     public static final int ENOTSOCK = placeholder();
    220     public static final int ENOTSUP = placeholder();
    221     public static final int ENOTTY = placeholder();
    222     public static final int ENXIO = placeholder();
    223     public static final int EOPNOTSUPP = placeholder();
    224     public static final int EOVERFLOW = placeholder();
    225     public static final int EPERM = placeholder();
    226     public static final int EPIPE = placeholder();
    227     public static final int EPROTO = placeholder();
    228     public static final int EPROTONOSUPPORT = placeholder();
    229     public static final int EPROTOTYPE = placeholder();
    230     public static final int ERANGE = placeholder();
    231     public static final int EROFS = placeholder();
    232     public static final int ESPIPE = placeholder();
    233     public static final int ESRCH = placeholder();
    234     public static final int ESTALE = placeholder();
    235     /** @hide */ public static final int ETH_P_ALL = placeholder();
    236     /** @hide */ public static final int ETH_P_ARP = placeholder();
    237     /** @hide */ public static final int ETH_P_IP = placeholder();
    238     /** @hide */ public static final int ETH_P_IPV6 = placeholder();
    239     public static final int ETIME = placeholder();
    240     public static final int ETIMEDOUT = placeholder();
    241     public static final int ETXTBSY = placeholder();
    242     /** @hide */ public static final int EUSERS = placeholder();
    243     // On Linux, EWOULDBLOCK == EAGAIN. Use EAGAIN instead, to reduce confusion.
    244     public static final int EXDEV = placeholder();
    245     public static final int EXIT_FAILURE = placeholder();
    246     public static final int EXIT_SUCCESS = placeholder();
    247     public static final int FD_CLOEXEC = placeholder();
    248     public static final int FIONREAD = placeholder();
    249     public static final int F_DUPFD = placeholder();
    250     /** @hide */ public static final int F_DUPFD_CLOEXEC = placeholder();
    251     public static final int F_GETFD = placeholder();
    252     public static final int F_GETFL = placeholder();
    253     public static final int F_GETLK = placeholder();
    254     public static final int F_GETLK64 = placeholder();
    255     public static final int F_GETOWN = placeholder();
    256     public static final int F_OK = placeholder();
    257     public static final int F_RDLCK = placeholder();
    258     public static final int F_SETFD = placeholder();
    259     public static final int F_SETFL = placeholder();
    260     public static final int F_SETLK = placeholder();
    261     public static final int F_SETLK64 = placeholder();
    262     public static final int F_SETLKW = placeholder();
    263     public static final int F_SETLKW64 = placeholder();
    264     public static final int F_SETOWN = placeholder();
    265     public static final int F_UNLCK = placeholder();
    266     public static final int F_WRLCK = placeholder();
    267     public static final int IFA_F_DADFAILED = placeholder();
    268     public static final int IFA_F_DEPRECATED = placeholder();
    269     public static final int IFA_F_HOMEADDRESS = placeholder();
    270     public static final int IFA_F_NODAD = placeholder();
    271     public static final int IFA_F_OPTIMISTIC = placeholder();
    272     public static final int IFA_F_PERMANENT = placeholder();
    273     public static final int IFA_F_SECONDARY = placeholder();
    274     public static final int IFA_F_TEMPORARY = placeholder();
    275     public static final int IFA_F_TENTATIVE = placeholder();
    276     public static final int IFF_ALLMULTI = placeholder();
    277     public static final int IFF_AUTOMEDIA = placeholder();
    278     public static final int IFF_BROADCAST = placeholder();
    279     public static final int IFF_DEBUG = placeholder();
    280     public static final int IFF_DYNAMIC = placeholder();
    281     public static final int IFF_LOOPBACK = placeholder();
    282     public static final int IFF_MASTER = placeholder();
    283     public static final int IFF_MULTICAST = placeholder();
    284     public static final int IFF_NOARP = placeholder();
    285     public static final int IFF_NOTRAILERS = placeholder();
    286     public static final int IFF_POINTOPOINT = placeholder();
    287     public static final int IFF_PORTSEL = placeholder();
    288     public static final int IFF_PROMISC = placeholder();
    289     public static final int IFF_RUNNING = placeholder();
    290     public static final int IFF_SLAVE = placeholder();
    291     public static final int IFF_UP = placeholder();
    292     public static final int IPPROTO_ICMP = placeholder();
    293     public static final int IPPROTO_ICMPV6 = placeholder();
    294     public static final int IPPROTO_IP = placeholder();
    295     public static final int IPPROTO_IPV6 = placeholder();
    296     public static final int IPPROTO_RAW = placeholder();
    297     public static final int IPPROTO_TCP = placeholder();
    298     public static final int IPPROTO_UDP = placeholder();
    299     public static final int IPV6_CHECKSUM = placeholder();
    300     public static final int IPV6_MULTICAST_HOPS = placeholder();
    301     public static final int IPV6_MULTICAST_IF = placeholder();
    302     public static final int IPV6_MULTICAST_LOOP = placeholder();
    303     public static final int IPV6_RECVDSTOPTS = placeholder();
    304     public static final int IPV6_RECVHOPLIMIT = placeholder();
    305     public static final int IPV6_RECVHOPOPTS = placeholder();
    306     public static final int IPV6_RECVPKTINFO = placeholder();
    307     public static final int IPV6_RECVRTHDR = placeholder();
    308     public static final int IPV6_RECVTCLASS = placeholder();
    309     public static final int IPV6_TCLASS = placeholder();
    310     public static final int IPV6_UNICAST_HOPS = placeholder();
    311     public static final int IPV6_V6ONLY = placeholder();
    312     public static final int IP_MULTICAST_IF = placeholder();
    313     public static final int IP_MULTICAST_LOOP = placeholder();
    314     public static final int IP_MULTICAST_TTL = placeholder();
    315     /** @hide */ public static final int IP_RECVTOS = placeholder();
    316     public static final int IP_TOS = placeholder();
    317     public static final int IP_TTL = placeholder();
    318     public static final int MAP_FIXED = placeholder();
    319     /** @hide */ public static final int MAP_POPULATE = placeholder();
    320     public static final int MAP_PRIVATE = placeholder();
    321     public static final int MAP_SHARED = placeholder();
    322     public static final int MCAST_JOIN_GROUP = placeholder();
    323     public static final int MCAST_LEAVE_GROUP = placeholder();
    324     public static final int MCAST_JOIN_SOURCE_GROUP = placeholder();
    325     public static final int MCAST_LEAVE_SOURCE_GROUP = placeholder();
    326     public static final int MCAST_BLOCK_SOURCE = placeholder();
    327     public static final int MCAST_UNBLOCK_SOURCE = placeholder();
    328     public static final int MCL_CURRENT = placeholder();
    329     public static final int MCL_FUTURE = placeholder();
    330     public static final int MSG_CTRUNC = placeholder();
    331     public static final int MSG_DONTROUTE = placeholder();
    332     public static final int MSG_EOR = placeholder();
    333     public static final int MSG_OOB = placeholder();
    334     public static final int MSG_PEEK = placeholder();
    335     public static final int MSG_TRUNC = placeholder();
    336     public static final int MSG_WAITALL = placeholder();
    337     public static final int MS_ASYNC = placeholder();
    338     public static final int MS_INVALIDATE = placeholder();
    339     public static final int MS_SYNC = placeholder();
    340     /** @hide */ public static final int NETLINK_ROUTE = placeholder();
    341     public static final int NI_DGRAM = placeholder();
    342     public static final int NI_NAMEREQD = placeholder();
    343     public static final int NI_NOFQDN = placeholder();
    344     public static final int NI_NUMERICHOST = placeholder();
    345     public static final int NI_NUMERICSERV = placeholder();
    346     public static final int O_ACCMODE = placeholder();
    347     public static final int O_APPEND = placeholder();
    348     /** @hide */ public static final int O_CLOEXEC = placeholder();
    349     public static final int O_CREAT = placeholder();
    350     public static final int O_EXCL = placeholder();
    351     public static final int O_NOCTTY = placeholder();
    352     public static final int O_NOFOLLOW = placeholder();
    353     public static final int O_NONBLOCK = placeholder();
    354     public static final int O_RDONLY = placeholder();
    355     public static final int O_RDWR = placeholder();
    356     public static final int O_SYNC = placeholder();
    357     /** @hide */ public static final int O_DSYNC = placeholder();
    358     public static final int O_TRUNC = placeholder();
    359     public static final int O_WRONLY = placeholder();
    360     public static final int POLLERR = placeholder();
    361     public static final int POLLHUP = placeholder();
    362     public static final int POLLIN = placeholder();
    363     public static final int POLLNVAL = placeholder();
    364     public static final int POLLOUT = placeholder();
    365     public static final int POLLPRI = placeholder();
    366     public static final int POLLRDBAND = placeholder();
    367     public static final int POLLRDNORM = placeholder();
    368     public static final int POLLWRBAND = placeholder();
    369     public static final int POLLWRNORM = placeholder();
    370     public static final int PR_GET_DUMPABLE = placeholder();
    371     public static final int PR_SET_DUMPABLE = placeholder();
    372     public static final int PR_SET_NO_NEW_PRIVS = placeholder();
    373     public static final int PROT_EXEC = placeholder();
    374     public static final int PROT_NONE = placeholder();
    375     public static final int PROT_READ = placeholder();
    376     public static final int PROT_WRITE = placeholder();
    377     public static final int R_OK = placeholder();
    378     public static final int RT_SCOPE_HOST = placeholder();
    379     public static final int RT_SCOPE_LINK = placeholder();
    380     public static final int RT_SCOPE_NOWHERE = placeholder();
    381     public static final int RT_SCOPE_SITE = placeholder();
    382     public static final int RT_SCOPE_UNIVERSE = placeholder();
    383     /** @hide */ public static final int RTMGRP_IPV4_IFADDR = placeholder();
    384     /** @hide */ public static final int RTMGRP_IPV4_MROUTE = placeholder();
    385     /** @hide */ public static final int RTMGRP_IPV4_ROUTE = placeholder();
    386     /** @hide */ public static final int RTMGRP_IPV4_RULE = placeholder();
    387     /** @hide */ public static final int RTMGRP_IPV6_IFADDR = placeholder();
    388     /** @hide */ public static final int RTMGRP_IPV6_IFINFO = placeholder();
    389     /** @hide */ public static final int RTMGRP_IPV6_MROUTE = placeholder();
    390     /** @hide */ public static final int RTMGRP_IPV6_PREFIX = placeholder();
    391     /** @hide */ public static final int RTMGRP_IPV6_ROUTE = placeholder();
    392     /** @hide */ public static final int RTMGRP_LINK = placeholder();
    393     /** @hide */ public static final int RTMGRP_NEIGH = placeholder();
    394     /** @hide */ public static final int RTMGRP_NOTIFY = placeholder();
    395     /** @hide */ public static final int RTMGRP_TC = placeholder();
    396     public static final int SEEK_CUR = placeholder();
    397     public static final int SEEK_END = placeholder();
    398     public static final int SEEK_SET = placeholder();
    399     public static final int SHUT_RD = placeholder();
    400     public static final int SHUT_RDWR = placeholder();
    401     public static final int SHUT_WR = placeholder();
    402     public static final int SIGABRT = placeholder();
    403     public static final int SIGALRM = placeholder();
    404     public static final int SIGBUS = placeholder();
    405     public static final int SIGCHLD = placeholder();
    406     public static final int SIGCONT = placeholder();
    407     public static final int SIGFPE = placeholder();
    408     public static final int SIGHUP = placeholder();
    409     public static final int SIGILL = placeholder();
    410     public static final int SIGINT = placeholder();
    411     public static final int SIGIO = placeholder();
    412     public static final int SIGKILL = placeholder();
    413     public static final int SIGPIPE = placeholder();
    414     public static final int SIGPROF = placeholder();
    415     public static final int SIGPWR = placeholder();
    416     public static final int SIGQUIT = placeholder();
    417     public static final int SIGRTMAX = placeholder();
    418     public static final int SIGRTMIN = placeholder();
    419     public static final int SIGSEGV = placeholder();
    420     public static final int SIGSTKFLT = placeholder();
    421     public static final int SIGSTOP = placeholder();
    422     public static final int SIGSYS = placeholder();
    423     public static final int SIGTERM = placeholder();
    424     public static final int SIGTRAP = placeholder();
    425     public static final int SIGTSTP = placeholder();
    426     public static final int SIGTTIN = placeholder();
    427     public static final int SIGTTOU = placeholder();
    428     public static final int SIGURG = placeholder();
    429     public static final int SIGUSR1 = placeholder();
    430     public static final int SIGUSR2 = placeholder();
    431     public static final int SIGVTALRM = placeholder();
    432     public static final int SIGWINCH = placeholder();
    433     public static final int SIGXCPU = placeholder();
    434     public static final int SIGXFSZ = placeholder();
    435     public static final int SIOCGIFADDR = placeholder();
    436     public static final int SIOCGIFBRDADDR = placeholder();
    437     public static final int SIOCGIFDSTADDR = placeholder();
    438     public static final int SIOCGIFNETMASK = placeholder();
    439     public static final int SOCK_DGRAM = placeholder();
    440     public static final int SOCK_RAW = placeholder();
    441     public static final int SOCK_SEQPACKET = placeholder();
    442     public static final int SOCK_STREAM = placeholder();
    443     public static final int SOL_SOCKET = placeholder();
    444     public static final int SO_BINDTODEVICE = placeholder();
    445     public static final int SO_BROADCAST = placeholder();
    446     public static final int SO_DEBUG = placeholder();
    447     public static final int SO_DONTROUTE = placeholder();
    448     public static final int SO_ERROR = placeholder();
    449     public static final int SO_KEEPALIVE = placeholder();
    450     public static final int SO_LINGER = placeholder();
    451     public static final int SO_OOBINLINE = placeholder();
    452     public static final int SO_PASSCRED = placeholder();
    453     public static final int SO_PEERCRED = placeholder();
    454     public static final int SO_RCVBUF = placeholder();
    455     public static final int SO_RCVLOWAT = placeholder();
    456     public static final int SO_RCVTIMEO = placeholder();
    457     public static final int SO_REUSEADDR = placeholder();
    458     public static final int SO_SNDBUF = placeholder();
    459     public static final int SO_SNDLOWAT = placeholder();
    460     public static final int SO_SNDTIMEO = placeholder();
    461     public static final int SO_TYPE = placeholder();
    462     public static final int STDERR_FILENO = placeholder();
    463     public static final int STDIN_FILENO = placeholder();
    464     public static final int STDOUT_FILENO = placeholder();
    465     public static final int ST_MANDLOCK = placeholder();
    466     public static final int ST_NOATIME = placeholder();
    467     public static final int ST_NODEV = placeholder();
    468     public static final int ST_NODIRATIME = placeholder();
    469     public static final int ST_NOEXEC = placeholder();
    470     public static final int ST_NOSUID = placeholder();
    471     public static final int ST_RDONLY = placeholder();
    472     public static final int ST_RELATIME = placeholder();
    473     public static final int ST_SYNCHRONOUS = placeholder();
    474     public static final int S_IFBLK = placeholder();
    475     public static final int S_IFCHR = placeholder();
    476     public static final int S_IFDIR = placeholder();
    477     public static final int S_IFIFO = placeholder();
    478     public static final int S_IFLNK = placeholder();
    479     public static final int S_IFMT = placeholder();
    480     public static final int S_IFREG = placeholder();
    481     public static final int S_IFSOCK = placeholder();
    482     public static final int S_IRGRP = placeholder();
    483     public static final int S_IROTH = placeholder();
    484     public static final int S_IRUSR = placeholder();
    485     public static final int S_IRWXG = placeholder();
    486     public static final int S_IRWXO = placeholder();
    487     public static final int S_IRWXU = placeholder();
    488     public static final int S_ISGID = placeholder();
    489     public static final int S_ISUID = placeholder();
    490     public static final int S_ISVTX = placeholder();
    491     public static final int S_IWGRP = placeholder();
    492     public static final int S_IWOTH = placeholder();
    493     public static final int S_IWUSR = placeholder();
    494     public static final int S_IXGRP = placeholder();
    495     public static final int S_IXOTH = placeholder();
    496     public static final int S_IXUSR = placeholder();
    497     public static final int TCP_NODELAY = placeholder();
    498     /** @hide */ public static final int TIOCOUTQ = placeholder();
    499     /** @hide */ public static final int UNIX_PATH_MAX = placeholder();
    500     public static final int WCONTINUED = placeholder();
    501     public static final int WEXITED = placeholder();
    502     public static final int WNOHANG = placeholder();
    503     public static final int WNOWAIT = placeholder();
    504     public static final int WSTOPPED = placeholder();
    505     public static final int WUNTRACED = placeholder();
    506     public static final int W_OK = placeholder();
    507     /** @hide */ public static final int XATTR_CREATE = placeholder();
    508     /** @hide */ public static final int XATTR_REPLACE = placeholder();
    509     public static final int X_OK = placeholder();
    510     public static final int _SC_2_CHAR_TERM = placeholder();
    511     public static final int _SC_2_C_BIND = placeholder();
    512     public static final int _SC_2_C_DEV = placeholder();
    513     public static final int _SC_2_C_VERSION = placeholder();
    514     public static final int _SC_2_FORT_DEV = placeholder();
    515     public static final int _SC_2_FORT_RUN = placeholder();
    516     public static final int _SC_2_LOCALEDEF = placeholder();
    517     public static final int _SC_2_SW_DEV = placeholder();
    518     public static final int _SC_2_UPE = placeholder();
    519     public static final int _SC_2_VERSION = placeholder();
    520     public static final int _SC_AIO_LISTIO_MAX = placeholder();
    521     public static final int _SC_AIO_MAX = placeholder();
    522     public static final int _SC_AIO_PRIO_DELTA_MAX = placeholder();
    523     public static final int _SC_ARG_MAX = placeholder();
    524     public static final int _SC_ASYNCHRONOUS_IO = placeholder();
    525     public static final int _SC_ATEXIT_MAX = placeholder();
    526     public static final int _SC_AVPHYS_PAGES = placeholder();
    527     public static final int _SC_BC_BASE_MAX = placeholder();
    528     public static final int _SC_BC_DIM_MAX = placeholder();
    529     public static final int _SC_BC_SCALE_MAX = placeholder();
    530     public static final int _SC_BC_STRING_MAX = placeholder();
    531     public static final int _SC_CHILD_MAX = placeholder();
    532     public static final int _SC_CLK_TCK = placeholder();
    533     public static final int _SC_COLL_WEIGHTS_MAX = placeholder();
    534     public static final int _SC_DELAYTIMER_MAX = placeholder();
    535     public static final int _SC_EXPR_NEST_MAX = placeholder();
    536     public static final int _SC_FSYNC = placeholder();
    537     public static final int _SC_GETGR_R_SIZE_MAX = placeholder();
    538     public static final int _SC_GETPW_R_SIZE_MAX = placeholder();
    539     public static final int _SC_IOV_MAX = placeholder();
    540     public static final int _SC_JOB_CONTROL = placeholder();
    541     public static final int _SC_LINE_MAX = placeholder();
    542     public static final int _SC_LOGIN_NAME_MAX = placeholder();
    543     public static final int _SC_MAPPED_FILES = placeholder();
    544     public static final int _SC_MEMLOCK = placeholder();
    545     public static final int _SC_MEMLOCK_RANGE = placeholder();
    546     public static final int _SC_MEMORY_PROTECTION = placeholder();
    547     public static final int _SC_MESSAGE_PASSING = placeholder();
    548     public static final int _SC_MQ_OPEN_MAX = placeholder();
    549     public static final int _SC_MQ_PRIO_MAX = placeholder();
    550     public static final int _SC_NGROUPS_MAX = placeholder();
    551     public static final int _SC_NPROCESSORS_CONF = placeholder();
    552     public static final int _SC_NPROCESSORS_ONLN = placeholder();
    553     public static final int _SC_OPEN_MAX = placeholder();
    554     public static final int _SC_PAGESIZE = placeholder();
    555     public static final int _SC_PAGE_SIZE = placeholder();
    556     public static final int _SC_PASS_MAX = placeholder();
    557     public static final int _SC_PHYS_PAGES = placeholder();
    558     public static final int _SC_PRIORITIZED_IO = placeholder();
    559     public static final int _SC_PRIORITY_SCHEDULING = placeholder();
    560     public static final int _SC_REALTIME_SIGNALS = placeholder();
    561     public static final int _SC_RE_DUP_MAX = placeholder();
    562     public static final int _SC_RTSIG_MAX = placeholder();
    563     public static final int _SC_SAVED_IDS = placeholder();
    564     public static final int _SC_SEMAPHORES = placeholder();
    565     public static final int _SC_SEM_NSEMS_MAX = placeholder();
    566     public static final int _SC_SEM_VALUE_MAX = placeholder();
    567     public static final int _SC_SHARED_MEMORY_OBJECTS = placeholder();
    568     public static final int _SC_SIGQUEUE_MAX = placeholder();
    569     public static final int _SC_STREAM_MAX = placeholder();
    570     public static final int _SC_SYNCHRONIZED_IO = placeholder();
    571     public static final int _SC_THREADS = placeholder();
    572     public static final int _SC_THREAD_ATTR_STACKADDR = placeholder();
    573     public static final int _SC_THREAD_ATTR_STACKSIZE = placeholder();
    574     public static final int _SC_THREAD_DESTRUCTOR_ITERATIONS = placeholder();
    575     public static final int _SC_THREAD_KEYS_MAX = placeholder();
    576     public static final int _SC_THREAD_PRIORITY_SCHEDULING = placeholder();
    577     public static final int _SC_THREAD_PRIO_INHERIT = placeholder();
    578     public static final int _SC_THREAD_PRIO_PROTECT = placeholder();
    579     public static final int _SC_THREAD_SAFE_FUNCTIONS = placeholder();
    580     public static final int _SC_THREAD_STACK_MIN = placeholder();
    581     public static final int _SC_THREAD_THREADS_MAX = placeholder();
    582     public static final int _SC_TIMERS = placeholder();
    583     public static final int _SC_TIMER_MAX = placeholder();
    584     public static final int _SC_TTY_NAME_MAX = placeholder();
    585     public static final int _SC_TZNAME_MAX = placeholder();
    586     public static final int _SC_VERSION = placeholder();
    587     public static final int _SC_XBS5_ILP32_OFF32 = placeholder();
    588     public static final int _SC_XBS5_ILP32_OFFBIG = placeholder();
    589     public static final int _SC_XBS5_LP64_OFF64 = placeholder();
    590     public static final int _SC_XBS5_LPBIG_OFFBIG = placeholder();
    591     public static final int _SC_XOPEN_CRYPT = placeholder();
    592     public static final int _SC_XOPEN_ENH_I18N = placeholder();
    593     public static final int _SC_XOPEN_LEGACY = placeholder();
    594     public static final int _SC_XOPEN_REALTIME = placeholder();
    595     public static final int _SC_XOPEN_REALTIME_THREADS = placeholder();
    596     public static final int _SC_XOPEN_SHM = placeholder();
    597     public static final int _SC_XOPEN_UNIX = placeholder();
    598     public static final int _SC_XOPEN_VERSION = placeholder();
    599     public static final int _SC_XOPEN_XCU_VERSION = placeholder();
    600 
    601     /**
    602      * Returns the string name of a getaddrinfo(3) error value.
    603      * For example, "EAI_AGAIN".
    604      */
    605     public static String gaiName(int error) {
    606         if (error == EAI_AGAIN) {
    607             return "EAI_AGAIN";
    608         }
    609         if (error == EAI_BADFLAGS) {
    610             return "EAI_BADFLAGS";
    611         }
    612         if (error == EAI_FAIL) {
    613             return "EAI_FAIL";
    614         }
    615         if (error == EAI_FAMILY) {
    616             return "EAI_FAMILY";
    617         }
    618         if (error == EAI_MEMORY) {
    619             return "EAI_MEMORY";
    620         }
    621         if (error == EAI_NODATA) {
    622             return "EAI_NODATA";
    623         }
    624         if (error == EAI_NONAME) {
    625             return "EAI_NONAME";
    626         }
    627         if (error == EAI_OVERFLOW) {
    628             return "EAI_OVERFLOW";
    629         }
    630         if (error == EAI_SERVICE) {
    631             return "EAI_SERVICE";
    632         }
    633         if (error == EAI_SOCKTYPE) {
    634             return "EAI_SOCKTYPE";
    635         }
    636         if (error == EAI_SYSTEM) {
    637             return "EAI_SYSTEM";
    638         }
    639         return null;
    640     }
    641 
    642     /**
    643      * Returns the string name of an errno value.
    644      * For example, "EACCES". See {@link Os#strerror} for human-readable errno descriptions.
    645      */
    646     public static String errnoName(int errno) {
    647         if (errno == E2BIG) {
    648             return "E2BIG";
    649         }
    650         if (errno == EACCES) {
    651             return "EACCES";
    652         }
    653         if (errno == EADDRINUSE) {
    654             return "EADDRINUSE";
    655         }
    656         if (errno == EADDRNOTAVAIL) {
    657             return "EADDRNOTAVAIL";
    658         }
    659         if (errno == EAFNOSUPPORT) {
    660             return "EAFNOSUPPORT";
    661         }
    662         if (errno == EAGAIN) {
    663             return "EAGAIN";
    664         }
    665         if (errno == EALREADY) {
    666             return "EALREADY";
    667         }
    668         if (errno == EBADF) {
    669             return "EBADF";
    670         }
    671         if (errno == EBADMSG) {
    672             return "EBADMSG";
    673         }
    674         if (errno == EBUSY) {
    675             return "EBUSY";
    676         }
    677         if (errno == ECANCELED) {
    678             return "ECANCELED";
    679         }
    680         if (errno == ECHILD) {
    681             return "ECHILD";
    682         }
    683         if (errno == ECONNABORTED) {
    684             return "ECONNABORTED";
    685         }
    686         if (errno == ECONNREFUSED) {
    687             return "ECONNREFUSED";
    688         }
    689         if (errno == ECONNRESET) {
    690             return "ECONNRESET";
    691         }
    692         if (errno == EDEADLK) {
    693             return "EDEADLK";
    694         }
    695         if (errno == EDESTADDRREQ) {
    696             return "EDESTADDRREQ";
    697         }
    698         if (errno == EDOM) {
    699             return "EDOM";
    700         }
    701         if (errno == EDQUOT) {
    702             return "EDQUOT";
    703         }
    704         if (errno == EEXIST) {
    705             return "EEXIST";
    706         }
    707         if (errno == EFAULT) {
    708             return "EFAULT";
    709         }
    710         if (errno == EFBIG) {
    711             return "EFBIG";
    712         }
    713         if (errno == EHOSTUNREACH) {
    714             return "EHOSTUNREACH";
    715         }
    716         if (errno == EIDRM) {
    717             return "EIDRM";
    718         }
    719         if (errno == EILSEQ) {
    720             return "EILSEQ";
    721         }
    722         if (errno == EINPROGRESS) {
    723             return "EINPROGRESS";
    724         }
    725         if (errno == EINTR) {
    726             return "EINTR";
    727         }
    728         if (errno == EINVAL) {
    729             return "EINVAL";
    730         }
    731         if (errno == EIO) {
    732             return "EIO";
    733         }
    734         if (errno == EISCONN) {
    735             return "EISCONN";
    736         }
    737         if (errno == EISDIR) {
    738             return "EISDIR";
    739         }
    740         if (errno == ELOOP) {
    741             return "ELOOP";
    742         }
    743         if (errno == EMFILE) {
    744             return "EMFILE";
    745         }
    746         if (errno == EMLINK) {
    747             return "EMLINK";
    748         }
    749         if (errno == EMSGSIZE) {
    750             return "EMSGSIZE";
    751         }
    752         if (errno == EMULTIHOP) {
    753             return "EMULTIHOP";
    754         }
    755         if (errno == ENAMETOOLONG) {
    756             return "ENAMETOOLONG";
    757         }
    758         if (errno == ENETDOWN) {
    759             return "ENETDOWN";
    760         }
    761         if (errno == ENETRESET) {
    762             return "ENETRESET";
    763         }
    764         if (errno == ENETUNREACH) {
    765             return "ENETUNREACH";
    766         }
    767         if (errno == ENFILE) {
    768             return "ENFILE";
    769         }
    770         if (errno == ENOBUFS) {
    771             return "ENOBUFS";
    772         }
    773         if (errno == ENODATA) {
    774             return "ENODATA";
    775         }
    776         if (errno == ENODEV) {
    777             return "ENODEV";
    778         }
    779         if (errno == ENOENT) {
    780             return "ENOENT";
    781         }
    782         if (errno == ENOEXEC) {
    783             return "ENOEXEC";
    784         }
    785         if (errno == ENOLCK) {
    786             return "ENOLCK";
    787         }
    788         if (errno == ENOLINK) {
    789             return "ENOLINK";
    790         }
    791         if (errno == ENOMEM) {
    792             return "ENOMEM";
    793         }
    794         if (errno == ENOMSG) {
    795             return "ENOMSG";
    796         }
    797         if (errno == ENONET) {
    798             return "ENONET";
    799         }
    800         if (errno == ENOPROTOOPT) {
    801             return "ENOPROTOOPT";
    802         }
    803         if (errno == ENOSPC) {
    804             return "ENOSPC";
    805         }
    806         if (errno == ENOSR) {
    807             return "ENOSR";
    808         }
    809         if (errno == ENOSTR) {
    810             return "ENOSTR";
    811         }
    812         if (errno == ENOSYS) {
    813             return "ENOSYS";
    814         }
    815         if (errno == ENOTCONN) {
    816             return "ENOTCONN";
    817         }
    818         if (errno == ENOTDIR) {
    819             return "ENOTDIR";
    820         }
    821         if (errno == ENOTEMPTY) {
    822             return "ENOTEMPTY";
    823         }
    824         if (errno == ENOTSOCK) {
    825             return "ENOTSOCK";
    826         }
    827         if (errno == ENOTSUP) {
    828             return "ENOTSUP";
    829         }
    830         if (errno == ENOTTY) {
    831             return "ENOTTY";
    832         }
    833         if (errno == ENXIO) {
    834             return "ENXIO";
    835         }
    836         if (errno == EOPNOTSUPP) {
    837             return "EOPNOTSUPP";
    838         }
    839         if (errno == EOVERFLOW) {
    840             return "EOVERFLOW";
    841         }
    842         if (errno == EPERM) {
    843             return "EPERM";
    844         }
    845         if (errno == EPIPE) {
    846             return "EPIPE";
    847         }
    848         if (errno == EPROTO) {
    849             return "EPROTO";
    850         }
    851         if (errno == EPROTONOSUPPORT) {
    852             return "EPROTONOSUPPORT";
    853         }
    854         if (errno == EPROTOTYPE) {
    855             return "EPROTOTYPE";
    856         }
    857         if (errno == ERANGE) {
    858             return "ERANGE";
    859         }
    860         if (errno == EROFS) {
    861             return "EROFS";
    862         }
    863         if (errno == ESPIPE) {
    864             return "ESPIPE";
    865         }
    866         if (errno == ESRCH) {
    867             return "ESRCH";
    868         }
    869         if (errno == ESTALE) {
    870             return "ESTALE";
    871         }
    872         if (errno == ETIME) {
    873             return "ETIME";
    874         }
    875         if (errno == ETIMEDOUT) {
    876             return "ETIMEDOUT";
    877         }
    878         if (errno == ETXTBSY) {
    879             return "ETXTBSY";
    880         }
    881         if (errno == EXDEV) {
    882             return "EXDEV";
    883         }
    884         return null;
    885     }
    886 
    887     private static native void initConstants();
    888 
    889     // A hack to avoid these constants being inlined by javac...
    890     private static int placeholder() { return 0; }
    891     // ...because we want to initialize them at runtime.
    892     static {
    893         initConstants();
    894     }
    895 }
    896