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library_syscall.js
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var SyscallsLibrary = {
$SYSCALLS__deps: [
#if NO_FILESYSTEM == 0
'$FS', '$ERRNO_CODES', '$PATH',
#endif
#if SYSCALL_DEBUG
'$ERRNO_MESSAGES'
#endif
],
$SYSCALLS: {
#if NO_FILESYSTEM == 0
// global constants
DEFAULT_POLLMASK: {{{ cDefine('POLLIN') }}} | {{{ cDefine('POLLOUT') }}},
// global state
mappings: {},
umask: 0x1FF, // S_IRWXU | S_IRWXG | S_IRWXO
// shared utilities
calculateAt: function(dirfd, path) {
if (path[0] !== '/') {
// relative path
var dir;
if (dirfd === {{{ cDefine('AT_FDCWD') }}}) {
dir = FS.cwd();
} else {
var dirstream = FS.getStream(dirfd);
if (!dirstream) throw new FS.ErrnoError(ERRNO_CODES.EBADF);
dir = dirstream.path;
}
path = PATH.join2(dir, path);
}
return path;
},
doStat: function(func, path, buf) {
try {
var stat = func(path);
} catch (e) {
if (e && e.node && PATH.normalize(path) !== PATH.normalize(FS.getPath(e.node))) {
// an error occurred while trying to look up the path; we should just report ENOTDIR
return -ERRNO_CODES.ENOTDIR;
}
throw e;
}
{{{ makeSetValue('buf', C_STRUCTS.stat.st_dev, 'stat.dev', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.__st_dev_padding, '0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.__st_ino_truncated, 'stat.ino', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_mode, 'stat.mode', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_nlink, 'stat.nlink', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_uid, 'stat.uid', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_gid, 'stat.gid', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_rdev, 'stat.rdev', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.__st_rdev_padding, '0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_size, 'stat.size', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_blksize, '4096', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_blocks, 'stat.blocks', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_atim.tv_sec, '(stat.atime.getTime() / 1000)|0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_atim.tv_nsec, '0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_mtim.tv_sec, '(stat.mtime.getTime() / 1000)|0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_mtim.tv_nsec, '0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_ctim.tv_sec, '(stat.ctime.getTime() / 1000)|0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_ctim.tv_nsec, '0', 'i32') }}};
{{{ makeSetValue('buf', C_STRUCTS.stat.st_ino, 'stat.ino', 'i32') }}};
return 0;
},
doMsync: function(addr, stream, len, flags) {
var buffer = new Uint8Array(HEAPU8.subarray(addr, addr + len));
FS.msync(stream, buffer, 0, len, flags);
},
doMkdir: function(path, mode) {
// remove a trailing slash, if one - /a/b/ has basename of '', but
// we want to create b in the context of this function
path = PATH.normalize(path);
if (path[path.length-1] === '/') path = path.substr(0, path.length-1);
FS.mkdir(path, mode, 0);
return 0;
},
doMknod: function(path, mode, dev) {
// we don't want this in the JS API as it uses mknod to create all nodes.
switch (mode & {{{ cDefine('S_IFMT') }}}) {
case {{{ cDefine('S_IFREG') }}}:
case {{{ cDefine('S_IFCHR') }}}:
case {{{ cDefine('S_IFBLK') }}}:
case {{{ cDefine('S_IFIFO') }}}:
case {{{ cDefine('S_IFSOCK') }}}:
break;
default: return -ERRNO_CODES.EINVAL;
}
FS.mknod(path, mode, dev);
return 0;
},
doReadlink: function(path, buf, bufsize) {
if (bufsize <= 0) return -ERRNO_CODES.EINVAL;
var ret = FS.readlink(path);
var len = Math.min(bufsize, lengthBytesUTF8(ret));
var endChar = HEAP8[buf+len];
stringToUTF8(ret, buf, bufsize+1);
// readlink is one of the rare functions that write out a C string, but does never append a null to the output buffer(!)
// stringToUTF8() always appends a null byte, so restore the character under the null byte after the write.
HEAP8[buf+len] = endChar;
return len;
},
doAccess: function(path, amode) {
if (amode & ~{{{ cDefine('S_IRWXO') }}}) {
// need a valid mode
return -ERRNO_CODES.EINVAL;
}
var node;
var lookup = FS.lookupPath(path, { follow: true });
node = lookup.node;
var perms = '';
if (amode & {{{ cDefine('R_OK') }}}) perms += 'r';
if (amode & {{{ cDefine('W_OK') }}}) perms += 'w';
if (amode & {{{ cDefine('X_OK') }}}) perms += 'x';
if (perms /* otherwise, they've just passed F_OK */ && FS.nodePermissions(node, perms)) {
return -ERRNO_CODES.EACCES;
}
return 0;
},
doDup: function(path, flags, suggestFD) {
var suggest = FS.getStream(suggestFD);
if (suggest) FS.close(suggest);
return FS.open(path, flags, 0, suggestFD, suggestFD).fd;
},
doReadv: function(stream, iov, iovcnt, offset) {
var ret = 0;
for (var i = 0; i < iovcnt; i++) {
var ptr = {{{ makeGetValue('iov', 'i*8', 'i32') }}};
var len = {{{ makeGetValue('iov', 'i*8 + 4', 'i32') }}};
var curr = FS.read(stream, {{{ heapAndOffset('HEAP8', 'ptr') }}}, len, offset);
if (curr < 0) return -1;
ret += curr;
if (curr < len) break; // nothing more to read
}
return ret;
},
doWritev: function(stream, iov, iovcnt, offset) {
var ret = 0;
for (var i = 0; i < iovcnt; i++) {
var ptr = {{{ makeGetValue('iov', 'i*8', 'i32') }}};
var len = {{{ makeGetValue('iov', 'i*8 + 4', 'i32') }}};
var curr = FS.write(stream, {{{ heapAndOffset('HEAP8', 'ptr') }}}, len, offset);
if (curr < 0) return -1;
ret += curr;
}
return ret;
},
#endif // NO_FILESYSTEM == 0
// arguments handling
varargs: 0,
get: function(varargs) {
SYSCALLS.varargs += 4;
var ret = {{{ makeGetValue('SYSCALLS.varargs', '-4', 'i32') }}};
#if SYSCALL_DEBUG
Module.printErr(' (raw: "' + ret + '")');
#endif
return ret;
},
getStr: function() {
var ret = Pointer_stringify(SYSCALLS.get());
#if SYSCALL_DEBUG
Module.printErr(' (str: "' + ret + '")');
#endif
return ret;
},
#if NO_FILESYSTEM == 0
getStreamFromFD: function() {
var stream = FS.getStream(SYSCALLS.get());
if (!stream) throw new FS.ErrnoError(ERRNO_CODES.EBADF);
#if SYSCALL_DEBUG
Module.printErr(' (stream: "' + stream.path + '")');
#endif
return stream;
},
__mywrite_sockaddr: function(sa, family, addr, port, addrlen) {
if (addrlen && family === 2) {
{{{ makeSetValue('addrlen', 0, 16, 'i32') }}};
} else if (addrlen && family === 10) {
{{{ makeSetValue('addrlen', 0, 28, 'i32') }}};
} else {
Module.printErr('__mywrite_sockaddr error ' + addrl + ' ' + family);
}
return __write_sockaddr(sa, family, addr, port);
},
getSocketFromFD: function() {
var socket = SOCKFS.getSocket(SYSCALLS.get());
if (!socket) throw new FS.ErrnoError(ERRNO_CODES.EBADF);
#if SYSCALL_DEBUG
Module.printErr(' (socket: "' + socket.path + '")');
#endif
return socket;
},
getSocketAddress: function(allowNull) {
var addrp = SYSCALLS.get(), addrlen = SYSCALLS.get();
if (allowNull && addrp === 0) return null;
var info = __read_sockaddr(addrp, addrlen);
if (info.errno) throw new FS.ErrnoError(info.errno);
info.addr = DNS.lookup_addr(info.addr) || info.addr;
#if SYSCALL_DEBUG
Module.printErr(' (socketaddress: "' + [info.addr, info.port] + '")');
#endif
return info;
},
#endif // NO_FILESYSTEM == 0
get64: function() {
var low = SYSCALLS.get(), high = SYSCALLS.get();
if (low >= 0) assert(high === 0);
else assert(high === -1);
#if SYSCALL_DEBUG
Module.printErr(' (i64: "' + low + '")');
#endif
return low;
},
getZero: function() {
assert(SYSCALLS.get() === 0);
}
},
__syscall1: function(which, varargs) { // exit
var status = SYSCALLS.get();
Module['exit'](status);
return 0;
},
__syscall3: function(which, varargs) { // read
var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get(), count = SYSCALLS.get();
return FS.read(stream, {{{ heapAndOffset('HEAP8', 'buf') }}}, count);
},
__syscall4: function(which, varargs) { // write
var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get(), count = SYSCALLS.get();
return FS.write(stream, {{{ heapAndOffset('HEAP8', 'buf') }}}, count);
},
__syscall5: function(which, varargs) { // open
var pathname = SYSCALLS.getStr(), flags = SYSCALLS.get(), mode = SYSCALLS.get() // optional TODO
var stream = FS.open(pathname, flags, mode);
return stream.fd;
},
__syscall6: function(which, varargs) { // close
var stream = SYSCALLS.getStreamFromFD();
FS.close(stream);
return 0;
},
__syscall9: function(which, varargs) { // link
var oldpath = SYSCALLS.get(), newpath = SYSCALLS.get();
return -ERRNO_CODES.EMLINK; // no hardlinks for us
},
__syscall10: function(which, varargs) { // unlink
var path = SYSCALLS.getStr();
FS.unlink(path);
return 0;
},
__syscall12: function(which, varargs) { // chdir
var path = SYSCALLS.getStr();
FS.chdir(path);
return 0;
},
__syscall14: function(which, varargs) { // mknod
var path = SYSCALLS.getStr(), mode = SYSCALLS.get(), dev = SYSCALLS.get();
return SYSCALLS.doMknod(path, mode, dev);
},
__syscall15: function(which, varargs) { // chmod
var path = SYSCALLS.getStr(), mode = SYSCALLS.get();
FS.chmod(path, mode);
return 0;
},
__syscall20__deps: ['$PROCINFO'],
__syscall20: function(which, varargs) { // getpid
return PROCINFO.pid;
},
__syscall29: function(which, varargs) { // pause
return -ERRNO_CODES.EINTR; // we can't pause
},
__syscall33: function(which, varargs) { // access
var path = SYSCALLS.getStr(), amode = SYSCALLS.get();
return SYSCALLS.doAccess(path, amode);
},
__syscall34: function(which, varargs) { // nice
var inc = SYSCALLS.get();
return -ERRNO_CODES.EPERM; // no meaning to nice for our single-process environment
},
__syscall36: function(which, varargs) { // sync
return 0;
},
__syscall38: function(which, varargs) { // rename
var old_path = SYSCALLS.getStr(), new_path = SYSCALLS.getStr();
FS.rename(old_path, new_path);
return 0;
},
__syscall39: function(which, varargs) { // mkdir
var path = SYSCALLS.getStr(), mode = SYSCALLS.get();
return SYSCALLS.doMkdir(path, mode);
},
__syscall40: function(which, varargs) { // rmdir
var path = SYSCALLS.getStr();
FS.rmdir(path);
return 0;
},
__syscall41: function(which, varargs) { // dup
var old = SYSCALLS.getStreamFromFD();
return FS.open(old.path, old.flags, 0).fd;
},
__syscall42__deps: ['$PIPEFS'],
__syscall42: function(which, varargs) { // pipe
var fdPtr = SYSCALLS.get();
if (fdPtr == 0) {
throw new FS.ErrnoError(ERRNO_CODES.EFAULT);
}
var res = PIPEFS.createPipe();
{{{ makeSetValue('fdPtr', 0, 'res.readable_fd', 'i32') }}};
{{{ makeSetValue('fdPtr', 4, 'res.writable_fd', 'i32') }}};
return 0;
},
__syscall51: function(which, varargs) { // acct
return -ERRNO_CODES.ENOSYS; // unsupported features
},
__syscall54: function(which, varargs) { // ioctl
#if NO_FILESYSTEM
#if SYSCALL_DEBUG
Module.printErr('no-op in ioctl syscall due to NO_FILESYSTEM');
#endif
return 0;
#else
var stream = SYSCALLS.getStreamFromFD(), op = SYSCALLS.get();
switch (op) {
case {{{ cDefine('TCGETA') }}}:
case {{{ cDefine('TCGETS') }}}: {
if (!stream.tty) return -ERRNO_CODES.ENOTTY;
#if SYSCALL_DEBUG
Module.printErr('warning: not filling tio struct');
#endif
return 0;
}
case {{{ cDefine('TCSETA') }}}:
case {{{ cDefine('TCSETAW') }}}:
case {{{ cDefine('TCSETAF') }}}:
case {{{ cDefine('TCSETS') }}}:
case {{{ cDefine('TCSETSW') }}}:
case {{{ cDefine('TCSETSF') }}}: {
if (!stream.tty) return -ERRNO_CODES.ENOTTY;
return 0; // no-op, not actually adjusting terminal settings
}
case {{{ cDefine('TIOCGPGRP') }}}: {
if (!stream.tty) return -ERRNO_CODES.ENOTTY;
var argp = SYSCALLS.get();
{{{ makeSetValue('argp', 0, 0, 'i32') }}};
return 0;
}
case {{{ cDefine('TIOCSPGRP') }}}: {
if (!stream.tty) return -ERRNO_CODES.ENOTTY;
return -ERRNO_CODES.EINVAL; // not supported
}
case {{{ cDefine('FIONREAD') }}}: {
var argp = SYSCALLS.get();
return FS.ioctl(stream, op, argp);
}
case {{{ cDefine('TIOCGWINSZ') }}}: {
// TODO: in theory we should write to the winsize struct that gets
// passed in, but for now musl doesn't read anything on it
if (!stream.tty) return -ERRNO_CODES.ENOTTY;
return 0;
}
case 35090: { // SIOCGIFCONF
return -ERRNO_CODES.EINVAL;
}
default: abort('bad ioctl syscall ' + op);
}
#endif // NO_FILESYSTEM
},
__syscall57__deps: ['$PROCINFO'],
__syscall57: function(which, varargs) { // setpgid
var pid = SYSCALLS.get(), pgid = SYSCALLS.get();
if (pid && pid !== PROCINFO.pid) return -ERRNO_CODES.ESRCH;
if (pgid && pgid !== PROCINFO.pgid) return -ERRNO_CODES.EPERM;
return 0;
},
__syscall60: function(which, varargs) { // umask
var mask = SYSCALLS.get();
var old = SYSCALLS.umask;
SYSCALLS.umask = mask;
return old;
},
__syscall63: function(which, varargs) { // dup2
var old = SYSCALLS.getStreamFromFD(), suggestFD = SYSCALLS.get();
if (old.fd === suggestFD) return suggestFD;
return SYSCALLS.doDup(old.path, old.flags, suggestFD);
},
__syscall64__deps: ['$PROCINFO'],
__syscall64: function(which, varargs) { // getppid
return PROCINFO.ppid;
},
__syscall65__deps: ['$PROCINFO'],
__syscall65: function(which, varargs) { // getpgrp
return PROCINFO.pgid;
},
__syscall66: function(which, varargs) { // setsid
return 0; // no-op
},
__syscall75: function(which, varargs) { // setrlimit
return 0; // no-op
},
__syscall77: function(which, varargs) { // getrusage
#if SYSCALL_DEBUG
Module.printErr('warning: untested syscall');
#endif
var who = SYSCALLS.get(), usage = SYSCALLS.get();
_memset(usage, 0, {{{ C_STRUCTS.rusage.__size__ }}});
{{{ makeSetValue('usage', C_STRUCTS.rusage.ru_utime.tv_sec, '1', 'i32') }}}; // fake some values
{{{ makeSetValue('usage', C_STRUCTS.rusage.ru_utime.tv_usec, '2', 'i32') }}};
{{{ makeSetValue('usage', C_STRUCTS.rusage.ru_stime.tv_sec, '3', 'i32') }}};
{{{ makeSetValue('usage', C_STRUCTS.rusage.ru_stime.tv_usec, '4', 'i32') }}};
return 0;
},
__syscall83: function(which, varargs) { // symlink
var target = SYSCALLS.getStr(), linkpath = SYSCALLS.getStr();
FS.symlink(target, linkpath);
return 0;
},
__syscall85: function(which, varargs) { // readlink
var path = SYSCALLS.getStr(), buf = SYSCALLS.get(), bufsize = SYSCALLS.get();
return SYSCALLS.doReadlink(path, buf, bufsize);
},
__syscall91: function(which, varargs) { // munmap
var addr = SYSCALLS.get(), len = SYSCALLS.get();
// TODO: support unmmap'ing parts of allocations
var info = SYSCALLS.mappings[addr];
if (!info) return 0;
if (len === info.len) {
var stream = FS.getStream(info.fd);
SYSCALLS.doMsync(addr, stream, len, info.flags)
FS.munmap(stream);
SYSCALLS.mappings[addr] = null;
if (info.allocated) {
_free(info.malloc);
}
}
return 0;
},
__syscall94: function(which, varargs) { // fchmod
var fd = SYSCALLS.get(), mode = SYSCALLS.get();
FS.fchmod(fd, mode);
return 0;
},
__syscall96: function(which, varargs) { // getpriority
return 0;
},
__syscall97: function(which, varargs) { // setpriority
return -ERRNO_CODES.EPERM;
},
__syscall102__deps: ['$SOCKFS', '$DNS', '_read_sockaddr', '_write_sockaddr'],
__syscall102: function(which, varargs) { // socketcall
var call = SYSCALLS.get(), socketvararg = SYSCALLS.get();
// socketcalls pass the rest of the arguments in a struct
SYSCALLS.varargs = socketvararg;
switch (call) {
case 1: { // socket
var domain = SYSCALLS.get(), type = SYSCALLS.get(), protocol = SYSCALLS.get();
var sock = SOCKFS.createSocket(domain, type, protocol);
//assert(sock.stream.fd < 64); // XXX ? select() assumes socket fd values are in 0..63
return sock.stream.fd;
}
case 2: { // bind
var sock = SYSCALLS.getSocketFromFD(), info = SYSCALLS.getSocketAddress();
sock.sock_ops.bind(sock, info.addr, info.port);
return 0;
}
case 3: { // connect
var sock = SYSCALLS.getSocketFromFD(), info = SYSCALLS.getSocketAddress();
sock.sock_ops.connect(sock, info.addr, info.port);
return 0;
}
case 4: { // listen
var sock = SYSCALLS.getSocketFromFD(), backlog = SYSCALLS.get();
sock.sock_ops.listen(sock, backlog);
return 0;
}
case 5: { // accept
var sock = SYSCALLS.getSocketFromFD(), addr = SYSCALLS.get(), addrlen = SYSCALLS.get();
var newsock = sock.sock_ops.accept(sock);
if (addr) {
var res = SYSCALLS.__mywrite_sockaddr(addr, newsock.family, DNS.lookup_name(newsock.daddr), newsock.dport, addrlen);
assert(!res.errno);
}
return newsock.stream.fd;
}
case 6: { // getsockname
var sock = SYSCALLS.getSocketFromFD(), addr = SYSCALLS.get(), addrlen = SYSCALLS.get();
// TODO: sock.saddr should never be undefined, see TODO in websocket_sock_ops.getname
var res = SYSCALLS.__mywrite_sockaddr(addr, sock.family, DNS.lookup_name(sock.saddr || '0.0.0.0'), sock.sport, addrlen);
assert(!res.errno);
return 0;
}
case 7: { // getpeername
var sock = SYSCALLS.getSocketFromFD(), addr = SYSCALLS.get(), addrlen = SYSCALLS.get();
if (!sock.daddr) {
return -ERRNO_CODES.ENOTCONN; // The socket is not connected.
}
var res = SYSCALLS.__mywrite_sockaddr(addr, sock.family, DNS.lookup_name(sock.daddr), sock.dport, addrlen);
assert(!res.errno);
return 0;
}
case 11: { // sendto
var sock = SYSCALLS.getSocketFromFD(), message = SYSCALLS.get(), length = SYSCALLS.get(), flags = SYSCALLS.get(), dest = SYSCALLS.getSocketAddress(true);
if (!dest) {
// send, no address provided
return FS.write(sock.stream, {{{ heapAndOffset('HEAP8', 'message') }}}, length);
} else {
// sendto an address
return sock.sock_ops.sendmsg(sock, {{{ heapAndOffset('HEAP8', 'message') }}}, length, dest.addr, dest.port);
}
}
case 12: { // recvfrom
var sock = SYSCALLS.getSocketFromFD(), buf = SYSCALLS.get(), len = SYSCALLS.get(), flags = SYSCALLS.get(), addr = SYSCALLS.get(), addrlen = SYSCALLS.get();
var msg = sock.sock_ops.recvmsg(sock, len);
if (!msg) return 0; // socket is closed
if (addr) {
var res = SYSCALLS.__mywrite_sockaddr(addr, sock.family, DNS.lookup_name(msg.addr), msg.port, addrlen);
assert(!res.errno);
}
HEAPU8.set(msg.buffer, buf);
return msg.buffer.byteLength;
}
case 13: { // shutdown
// FIXME: implement
var sock = SYSCALLS.getSocketFromFD(), how = SYSCALLS.get();
return 0;
}
case 14: { // setsockopt
// FIXME: verify whether this is needed
return 0;
// return -ERRNO_CODES.ENOPROTOOPT; // The option is unknown at the level indicated.
}
case 15: { // getsockopt
var sock = SYSCALLS.getSocketFromFD(), level = SYSCALLS.get(), optname = SYSCALLS.get(), optval = SYSCALLS.get(), optlen = SYSCALLS.get();
// Minimal getsockopt aimed at resolving https://github.com/kripken/emscripten/issues/2211
// so only supports SOL_SOCKET with SO_ERROR.
if (level === {{{ cDefine('SOL_SOCKET') }}}) {
if (optname === {{{ cDefine('SO_ERROR') }}}) {
{{{ makeSetValue('optval', 0, 'sock.error', 'i32') }}};
{{{ makeSetValue('optlen', 0, 4, 'i32') }}};
sock.error = null; // Clear the error (The SO_ERROR option obtains and then clears this field).
return 0;
}
}
return -ERRNO_CODES.ENOPROTOOPT; // The option is unknown at the level indicated.
}
case 16: { // sendmsg
var sock = SYSCALLS.getSocketFromFD(), message = SYSCALLS.get(), flags = SYSCALLS.get();
var iov = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_iov, '*') }}};
var num = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_iovlen, 'i32') }}};
// read the address and port to send to
var addr, port;
var name = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_name, '*') }}};
var namelen = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_namelen, 'i32') }}};
if (name) {
var info = __read_sockaddr(name, namelen);
if (info.errno) return -info.errno;
port = info.port;
addr = DNS.lookup_addr(info.addr) || info.addr;
}
// concatenate scatter-gather arrays into one message buffer
var total = 0;
for (var i = 0; i < num; i++) {
total += {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_len, 'i32') }}};
}
var view = new Uint8Array(total);
var offset = 0;
for (var i = 0; i < num; i++) {
var iovbase = {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_base, 'i8*') }}};
var iovlen = {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_len, 'i32') }}};
for (var j = 0; j < iovlen; j++) {
view[offset++] = {{{ makeGetValue('iovbase', 'j', 'i8') }}};
}
}
// write the buffer
return sock.sock_ops.sendmsg(sock, view, 0, total, addr, port);
}
case 17: { // recvmsg
var sock = SYSCALLS.getSocketFromFD(), message = SYSCALLS.get(), flags = SYSCALLS.get();
var iov = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_iov, 'i8*') }}};
var num = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_iovlen, 'i32') }}};
// get the total amount of data we can read across all arrays
var total = 0;
for (var i = 0; i < num; i++) {
total += {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_len, 'i32') }}};
}
// try to read total data
var msg = sock.sock_ops.recvmsg(sock, total);
if (!msg) return 0; // socket is closed
// TODO honor flags:
// MSG_OOB
// Requests out-of-band data. The significance and semantics of out-of-band data are protocol-specific.
// MSG_PEEK
// Peeks at the incoming message.
// MSG_WAITALL
// Requests that the function block until the full amount of data requested can be returned. The function may return a smaller amount of data if a signal is caught, if the connection is terminated, if MSG_PEEK was specified, or if an error is pending for the socket.
// write the source address out
var name = {{{ makeGetValue('message', C_STRUCTS.msghdr.msg_name, '*') }}};
if (name) {
var res = __write_sockaddr(name, sock.family, DNS.lookup_name(msg.addr), msg.port);
assert(!res.errno);
}
// write the buffer out to the scatter-gather arrays
var bytesRead = 0;
var bytesRemaining = msg.buffer.byteLength;
for (var i = 0; bytesRemaining > 0 && i < num; i++) {
var iovbase = {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_base, 'i8*') }}};
var iovlen = {{{ makeGetValue('iov', '(' + C_STRUCTS.iovec.__size__ + ' * i) + ' + C_STRUCTS.iovec.iov_len, 'i32') }}};
if (!iovlen) {
continue;
}
var length = Math.min(iovlen, bytesRemaining);
var buf = msg.buffer.subarray(bytesRead, bytesRead + length);
HEAPU8.set(buf, iovbase + bytesRead);
bytesRead += length;
bytesRemaining -= length;
}
// TODO set msghdr.msg_flags
// MSG_EOR
// End of record was received (if supported by the protocol).
// MSG_OOB
// Out-of-band data was received.
// MSG_TRUNC
// Normal data was truncated.
// MSG_CTRUNC
return bytesRead;
}
default: abort('unsupported socketcall syscall ' + call);
}
},
__syscall104: function(which, varargs) { // setitimer
return -ERRNO_CODES.ENOSYS; // unsupported feature
},
__syscall114: function(which, varargs) { // wait4
abort('cannot wait on child processes');
},
#if EMTERPRETIFY_ASYNC
__syscall118__deps: ['$EmterpreterAsync'],
#endif
__syscall118: function(which, varargs) { // fsync
var stream = SYSCALLS.getStreamFromFD();
#if EMTERPRETIFY_ASYNC
return EmterpreterAsync.handle(function(resume) {
var mount = stream.node.mount;
if (!mount.type.syncfs) {
// We write directly to the file system, so there's nothing to do here.
resume(function() { return 0 });
return;
}
mount.type.syncfs(mount, false, function(err) {
if (err) {
resume(function() { return -ERRNO_CODES.EIO });
return;
}
resume(function() { return 0 });
});
});
#else
return 0; // we can't do anything synchronously; the in-memory FS is already synced to
#endif
},
__syscall121: function(which, varargs) { // setdomainname
return -ERRNO_CODES.EPERM;
},
__syscall122: function(which, varargs) { // uname
var buf = SYSCALLS.get();
if (!buf) return -ERRNO_CODES.EFAULT
var layout = {{{ JSON.stringify(C_STRUCTS.utsname) }}};
function copyString(element, value) {
var offset = layout[element];
writeAsciiToMemory(value, buf + offset);
}
copyString('sysname', 'Emscripten');
copyString('nodename', 'emscripten');
copyString('release', '1.0');
copyString('version', '#1');
copyString('machine', 'x86-JS');
return 0;
},
__syscall125: function(which, varargs) { // mprotect
return 0; // let's not and say we did
},
__syscall132__deps: ['$PROCINFO'],
__syscall132: function(which, varargs) { // getpgid
var pid = SYSCALLS.get();
if (pid && pid !== PROCINFO.pid) return -ERRNO_CODES.ESRCH;
return PROCINFO.pgid;
},
__syscall133: function(which, varargs) { // fchdir
var stream = SYSCALLS.getStreamFromFD();
FS.chdir(stream.path);
return 0;
},
__syscall140: function(which, varargs) { // llseek
var stream = SYSCALLS.getStreamFromFD(), offset_high = SYSCALLS.get(), offset_low = SYSCALLS.get(), result = SYSCALLS.get(), whence = SYSCALLS.get();
// NOTE: offset_high is unused - Emscripten's off_t is 32-bit
var offset = offset_low;
FS.llseek(stream, offset, whence);
{{{ makeSetValue('result', '0', 'stream.position', 'i32') }}};
if (stream.getdents && offset === 0 && whence === {{{ cDefine('SEEK_SET') }}}) stream.getdents = null; // reset readdir state
return 0;
},
__syscall142: function(which, varargs) { // newselect
// readfds are supported,
// writefds checks socket open status
// exceptfds not supported
// timeout is always 0 - fully async
var nfds = SYSCALLS.get(), readfds = SYSCALLS.get(), writefds = SYSCALLS.get(), exceptfds = SYSCALLS.get(), timeout = SYSCALLS.get();
// FIXME: what are the implications of ignoring this?
exceptfds = 0;
assert(nfds <= 64, 'nfds must be less than or equal to 64'); // fd sets have 64 bits // TODO: this could be 1024 based on current musl headers
assert(!exceptfds, 'exceptfds not supported');
var total = 0;
var srcReadLow = (readfds ? {{{ makeGetValue('readfds', 0, 'i32') }}} : 0),
srcReadHigh = (readfds ? {{{ makeGetValue('readfds', 4, 'i32') }}} : 0);
var srcWriteLow = (writefds ? {{{ makeGetValue('writefds', 0, 'i32') }}} : 0),
srcWriteHigh = (writefds ? {{{ makeGetValue('writefds', 4, 'i32') }}} : 0);
var srcExceptLow = (exceptfds ? {{{ makeGetValue('exceptfds', 0, 'i32') }}} : 0),
srcExceptHigh = (exceptfds ? {{{ makeGetValue('exceptfds', 4, 'i32') }}} : 0);
var dstReadLow = 0,
dstReadHigh = 0;
var dstWriteLow = 0,
dstWriteHigh = 0;
var dstExceptLow = 0,
dstExceptHigh = 0;
var allLow = (readfds ? {{{ makeGetValue('readfds', 0, 'i32') }}} : 0) |
(writefds ? {{{ makeGetValue('writefds', 0, 'i32') }}} : 0) |
(exceptfds ? {{{ makeGetValue('exceptfds', 0, 'i32') }}} : 0);
var allHigh = (readfds ? {{{ makeGetValue('readfds', 4, 'i32') }}} : 0) |
(writefds ? {{{ makeGetValue('writefds', 4, 'i32') }}} : 0) |
(exceptfds ? {{{ makeGetValue('exceptfds', 4, 'i32') }}} : 0);
function check(fd, low, high, val) {
return (fd < 32 ? (low & val) : (high & val));
}
for (var fd = 0; fd < nfds; fd++) {
var mask = 1 << (fd % 32);
if (!(check(fd, allLow, allHigh, mask))) {
continue; // index isn't in the set
}
var stream = FS.getStream(fd);
if (!stream) throw new FS.ErrnoError(ERRNO_CODES.EBADF);
var flags = SYSCALLS.DEFAULT_POLLMASK;
if (stream.stream_ops.poll) {
flags = stream.stream_ops.poll(stream);
}
if ((flags & {{{ cDefine('POLLIN') }}}) && check(fd, srcReadLow, srcReadHigh, mask)) {
fd < 32 ? (dstReadLow = dstReadLow | mask) : (dstReadHigh = dstReadHigh | mask);
total++;
}
if ((flags & {{{ cDefine('POLLOUT') }}}) && check(fd, srcWriteLow, srcWriteHigh, mask)) {
fd < 32 ? (dstWriteLow = dstWriteLow | mask) : (dstWriteHigh = dstWriteHigh | mask);
total++;
}
if ((flags & {{{ cDefine('POLLPRI') }}}) && check(fd, srcExceptLow, srcExceptHigh, mask)) {
fd < 32 ? (dstExceptLow = dstExceptLow | mask) : (dstExceptHigh = dstExceptHigh | mask);
total++;
}
}
if (readfds) {
{{{ makeSetValue('readfds', '0', 'dstReadLow', 'i32') }}};
{{{ makeSetValue('readfds', '4', 'dstReadHigh', 'i32') }}};
}
if (writefds) {
{{{ makeSetValue('writefds', '0', 'dstWriteLow', 'i32') }}};
{{{ makeSetValue('writefds', '4', 'dstWriteHigh', 'i32') }}};
}
if (exceptfds) {
{{{ makeSetValue('exceptfds', '0', 'dstExceptLow', 'i32') }}};
{{{ makeSetValue('exceptfds', '4', 'dstExceptHigh', 'i32') }}};
}
return total;
},
__syscall144: function(which, varargs) { // msync
var addr = SYSCALLS.get(), len = SYSCALLS.get(), flags = SYSCALLS.get();
var info = SYSCALLS.mappings[addr];
if (!info) return 0;
SYSCALLS.doMsync(addr, FS.getStream(info.fd), len, info.flags);
return 0;
},
__syscall145: function(which, varargs) { // readv
var stream = SYSCALLS.getStreamFromFD(), iov = SYSCALLS.get(), iovcnt = SYSCALLS.get();
return SYSCALLS.doReadv(stream, iov, iovcnt);
},
#if NO_FILESYSTEM
$flush_NO_FILESYSTEM: function() {
// flush anything remaining in the buffers during shutdown
var fflush = Module["_fflush"];
if (fflush) fflush(0);
var printChar = ___syscall146.printChar;
if (!printChar) return;
var buffers = ___syscall146.buffers;
if (buffers[1].length) printChar(1, {{{ charCode("\n") }}});
if (buffers[2].length) printChar(2, {{{ charCode("\n") }}});
},
__syscall146__deps: ['$flush_NO_FILESYSTEM'],
#if NO_EXIT_RUNTIME == 0
__syscall146__postset: '__ATEXIT__.push(flush_NO_FILESYSTEM);',
#endif
#endif
__syscall146: function(which, varargs) { // writev
#if NO_FILESYSTEM == 0
var stream = SYSCALLS.getStreamFromFD(), iov = SYSCALLS.get(), iovcnt = SYSCALLS.get();
return SYSCALLS.doWritev(stream, iov, iovcnt);
#else
// hack to support printf in NO_FILESYSTEM
var stream = SYSCALLS.get(), iov = SYSCALLS.get(), iovcnt = SYSCALLS.get();
var ret = 0;
if (!___syscall146.buffers) {
___syscall146.buffers = [null, [], []]; // 1 => stdout, 2 => stderr
___syscall146.printChar = function(stream, curr) {
var buffer = ___syscall146.buffers[stream];
assert(buffer);
if (curr === 0 || curr === {{{ charCode('\n') }}}) {
(stream === 1 ? Module['print'] : Module['printErr'])(UTF8ArrayToString(buffer, 0));
buffer.length = 0;
} else {
buffer.push(curr);
}
};
}
for (var i = 0; i < iovcnt; i++) {
var ptr = {{{ makeGetValue('iov', 'i*8', 'i32') }}};
var len = {{{ makeGetValue('iov', 'i*8 + 4', 'i32') }}};
for (var j = 0; j < len; j++) {
___syscall146.printChar(stream, HEAPU8[ptr+j]);
}
ret += len;
}
return ret;
#endif // NO_FILESYSTEM == 0
},
__syscall147__deps: ['$PROCINFO'],
__syscall147: function(which, varargs) { // getsid
var pid = SYSCALLS.get();
if (pid && pid !== PROCINFO.pid) return -ERRNO_CODES.ESRCH;
return PROCINFO.sid;
},
__syscall148: function(which, varargs) { // fdatasync
var stream = SYSCALLS.getStreamFromFD();
return 0; // we can't do anything synchronously; the in-memory FS is already synced to
},
__syscall150: '__syscall153', // mlock
__syscall151: '__syscall153', // munlock
__syscall152: '__syscall153', // mlockall
__syscall153: function(which, varargs) { // munlockall
return 0;
},
__syscall163: function(which, varargs) { // mremap
return -ERRNO_CODES.ENOMEM; // never succeed
},
__syscall168: function(which, varargs) { // poll
var fds = SYSCALLS.get(), nfds = SYSCALLS.get(), timeout = SYSCALLS.get();
var nonzero = 0;
for (var i = 0; i < nfds; i++) {
var pollfd = fds + {{{ C_STRUCTS.pollfd.__size__ }}} * i;
var fd = {{{ makeGetValue('pollfd', C_STRUCTS.pollfd.fd, 'i32') }}};
var events = {{{ makeGetValue('pollfd', C_STRUCTS.pollfd.events, 'i16') }}};
var mask = {{{ cDefine('POLLNVAL') }}};
var stream = FS.getStream(fd);
if (stream) {
mask = SYSCALLS.DEFAULT_POLLMASK;
if (stream.stream_ops.poll) {
mask = stream.stream_ops.poll(stream);
}
}
mask &= events | {{{ cDefine('POLLERR') }}} | {{{ cDefine('POLLHUP') }}};
if (mask) nonzero++;
{{{ makeSetValue('pollfd', C_STRUCTS.pollfd.revents, 'mask', 'i16') }}};
}
return nonzero;
},
__syscall178: function(which, varargs) { // rt_sigqueueinfo
#if SYSCALL_DEBUG
Module.printErr('warning: ignoring SYS_rt_sigqueueinfo');
#endif
return 0;
},
__syscall180: function(which, varargs) { // pread64
var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get(), count = SYSCALLS.get(), zero = SYSCALLS.getZero(), offset = SYSCALLS.get64();
return FS.read(stream, {{{ heapAndOffset('HEAP8', 'buf') }}}, count, offset);
},
__syscall181: function(which, varargs) { // pwrite64
var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get(), count = SYSCALLS.get(), zero = SYSCALLS.getZero(), offset = SYSCALLS.get64();
return FS.write(stream, {{{ heapAndOffset('HEAP8', 'buf') }}}, count, offset);
},
__syscall183: function(which, varargs) { // getcwd
var buf = SYSCALLS.get(), size = SYSCALLS.get();
if (size === 0) return -ERRNO_CODES.EINVAL;
var cwd = FS.cwd();
var cwdLengthInBytes = lengthBytesUTF8(cwd);
if (size < cwdLengthInBytes + 1) return -ERRNO_CODES.ERANGE;
stringToUTF8(cwd, buf, size);
return buf;
},
__syscall191: function(which, varargs) { // ugetrlimit
#if SYSCALL_DEBUG
Module.printErr('warning: untested syscall');
#endif
var resource = SYSCALLS.get(), rlim = SYSCALLS.get();
{{{ makeSetValue('rlim', C_STRUCTS.rlimit.rlim_cur, '-1', 'i32') }}}; // RLIM_INFINITY
{{{ makeSetValue('rlim', C_STRUCTS.rlimit.rlim_cur + 4, '-1', 'i32') }}}; // RLIM_INFINITY
{{{ makeSetValue('rlim', C_STRUCTS.rlimit.rlim_max, '-1', 'i32') }}}; // RLIM_INFINITY
{{{ makeSetValue('rlim', C_STRUCTS.rlimit.rlim_max + 4, '-1', 'i32') }}}; // RLIM_INFINITY
return 0; // just report no limits
},
__syscall192: function(which, varargs) { // mmap2
var addr = SYSCALLS.get(), len = SYSCALLS.get(), prot = SYSCALLS.get(), flags = SYSCALLS.get(), fd = SYSCALLS.get(), off = SYSCALLS.get()
off <<= 12; // undo pgoffset
var ptr;
var allocated = false;
if (fd === -1) {
ptr = _memalign(PAGE_SIZE, len);
if (!ptr) return -ERRNO_CODES.ENOMEM;
_memset(ptr, 0, len);
allocated = true;
} else {
var info = FS.getStream(fd);
if (!info) return -ERRNO_CODES.EBADF;
var res = FS.mmap(info, HEAPU8, addr, len, off, prot, flags);
ptr = res.ptr;
allocated = res.allocated;
}
SYSCALLS.mappings[ptr] = { malloc: ptr, len: len, allocated: allocated, fd: fd, flags: flags };
return ptr;
},
__syscall193: function(which, varargs) { // truncate64
var path = SYSCALLS.getStr(), zero = SYSCALLS.getZero(), length = SYSCALLS.get64();
FS.truncate(path, length);
return 0;
},
__syscall194: function(which, varargs) { // ftruncate64
var fd = SYSCALLS.get(), zero = SYSCALLS.getZero(), length = SYSCALLS.get64();
FS.ftruncate(fd, length);
return 0;
},
__syscall195: function(which, varargs) { // SYS_stat64
var path = SYSCALLS.getStr(), buf = SYSCALLS.get();
return SYSCALLS.doStat(FS.stat, path, buf);
},
__syscall196: function(which, varargs) { // SYS_lstat64
var path = SYSCALLS.getStr(), buf = SYSCALLS.get();
return SYSCALLS.doStat(FS.lstat, path, buf);
},
__syscall197: function(which, varargs) { // SYS_fstat64
var stream = SYSCALLS.getStreamFromFD(), buf = SYSCALLS.get();
return SYSCALLS.doStat(FS.stat, stream.path, buf);
},
__syscall198: function(which, varargs) { // lchown32
var path = SYSCALLS.getStr(), owner = SYSCALLS.get(), group = SYSCALLS.get();
FS.chown(path, owner, group); // XXX we ignore the 'l' aspect, and do the same as chown
return 0;
},
__syscall199: '__syscall202', // getuid32
__syscall200: '__syscall202', // getgid32
__syscall201: '__syscall202', // geteuid32
__syscall202: function(which, varargs) { // getgid32
return 0;
},
__syscall207: function(which, varargs) { // fchown32
var fd = SYSCALLS.get(), owner = SYSCALLS.get(), group = SYSCALLS.get();
FS.fchown(fd, owner, group);
return 0;
},
__syscall212: function(which, varargs) { // chown32
var path = SYSCALLS.getStr(), owner = SYSCALLS.get(), group = SYSCALLS.get();
FS.chown(path, owner, group);
return 0;
},
__syscall203: '__syscall214', // setreuid32
__syscall204: '__syscall214', // setregid32
__syscall213: '__syscall214', // setuid32
__syscall214: function(which, varargs) { // setgid32
var uid = SYSCALLS.get();
if (uid !== 0) return -ERRNO_CODES.EPERM;