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821 lines (651 loc) · 21.4 KB
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// Copyright 2009 Ryan Dahl <ry@tinyclouds.org>
#include <node.h>
#include <node_file.h>
#include <node_buffer.h>
#include <node_stat_watcher.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
/* used for readlink, AIX doesn't provide it */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif
#define ARRAY_SIZE(a) (sizeof(a) / sizeof(*(a)))
namespace node {
using namespace v8;
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define THROW_BAD_ARGS \
ThrowException(Exception::TypeError(String::New("Bad argument")))
static Persistent<String> encoding_symbol;
static Persistent<String> errno_symbol;
static Persistent<String> buf_symbol;
// Buffer for readlink() and other misc callers; keep this scoped at
// file-level rather than method-level to avoid excess stack usage.
static char getbuf[PATH_MAX + 1];
static int After(eio_req *req) {
HandleScope scope;
Persistent<Function> *callback = cb_unwrap(req->data);
ev_unref(EV_DEFAULT_UC);
// there is always at least one argument. "error"
int argc = 1;
// Allocate space for two args. We may only use one depending on the case.
// (Feel free to increase this if you need more)
Local<Value> argv[2];
// NOTE: This may be needed to be changed if something returns a -1
// for a success, which is possible.
if (req->result == -1) {
// If the request doesn't have a path parameter set.
if (!req->ptr1) {
argv[0] = ErrnoException(req->errorno);
} else {
argv[0] = ErrnoException(req->errorno, NULL, "", static_cast<const char*>(req->ptr1));
}
} else {
// error value is empty or null for non-error.
argv[0] = Local<Value>::New(Null());
// All have at least two args now.
argc = 2;
switch (req->type) {
// These all have no data to pass.
case EIO_CLOSE:
case EIO_RENAME:
case EIO_UNLINK:
case EIO_RMDIR:
case EIO_MKDIR:
case EIO_FTRUNCATE:
case EIO_FSYNC:
case EIO_FDATASYNC:
case EIO_LINK:
case EIO_SYMLINK:
case EIO_CHMOD:
case EIO_CHOWN:
// These, however, don't.
argc = 1;
break;
case EIO_OPEN:
case EIO_SENDFILE:
argv[1] = Integer::New(req->result);
break;
case EIO_WRITE:
argv[1] = Integer::New(req->result);
break;
case EIO_STAT:
case EIO_LSTAT:
case EIO_FSTAT:
{
struct stat *s = reinterpret_cast<struct stat*>(req->ptr2);
argv[1] = BuildStatsObject(s);
}
break;
case EIO_READLINK:
argv[1] = String::New(static_cast<char*>(req->ptr2), req->result);
break;
case EIO_READ:
// Buffer interface
argv[1] = Integer::New(req->result);
break;
case EIO_READDIR:
{
char *namebuf = static_cast<char*>(req->ptr2);
int nnames = req->result;
Local<Array> names = Array::New(nnames);
for (int i = 0; i < nnames; i++) {
Local<String> name = String::New(namebuf);
names->Set(Integer::New(i), name);
#ifndef NDEBUG
namebuf += strlen(namebuf);
assert(*namebuf == '\0');
namebuf += 1;
#else
namebuf += strlen(namebuf) + 1;
#endif
}
argv[1] = names;
}
break;
default:
assert(0 && "Unhandled eio response");
}
}
TryCatch try_catch;
(*callback)->Call(v8::Context::GetCurrent()->Global(), argc, argv);
if (try_catch.HasCaught()) {
FatalException(try_catch);
}
// Dispose of the persistent handle
cb_destroy(callback);
return 0;
}
#define ASYNC_CALL(func, callback, ...) \
eio_req *req = eio_##func(__VA_ARGS__, EIO_PRI_DEFAULT, After, \
cb_persist(callback)); \
assert(req); \
ev_ref(EV_DEFAULT_UC); \
return Undefined();
static Handle<Value> Close(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
if (args[1]->IsFunction()) {
ASYNC_CALL(close, args[1], fd)
} else {
int ret = close(fd);
if (ret != 0) return ThrowException(ErrnoException(errno));
return Undefined();
}
}
static Persistent<FunctionTemplate> stats_constructor_template;
static Persistent<String> dev_symbol;
static Persistent<String> ino_symbol;
static Persistent<String> mode_symbol;
static Persistent<String> nlink_symbol;
static Persistent<String> uid_symbol;
static Persistent<String> gid_symbol;
static Persistent<String> rdev_symbol;
static Persistent<String> size_symbol;
static Persistent<String> blksize_symbol;
static Persistent<String> blocks_symbol;
static Persistent<String> atime_symbol;
static Persistent<String> mtime_symbol;
static Persistent<String> ctime_symbol;
Local<Object> BuildStatsObject(struct stat * s) {
HandleScope scope;
if (dev_symbol.IsEmpty()) {
dev_symbol = NODE_PSYMBOL("dev");
ino_symbol = NODE_PSYMBOL("ino");
mode_symbol = NODE_PSYMBOL("mode");
nlink_symbol = NODE_PSYMBOL("nlink");
uid_symbol = NODE_PSYMBOL("uid");
gid_symbol = NODE_PSYMBOL("gid");
rdev_symbol = NODE_PSYMBOL("rdev");
size_symbol = NODE_PSYMBOL("size");
blksize_symbol = NODE_PSYMBOL("blksize");
blocks_symbol = NODE_PSYMBOL("blocks");
atime_symbol = NODE_PSYMBOL("atime");
mtime_symbol = NODE_PSYMBOL("mtime");
ctime_symbol = NODE_PSYMBOL("ctime");
}
Local<Object> stats =
stats_constructor_template->GetFunction()->NewInstance();
/* ID of device containing file */
stats->Set(dev_symbol, Integer::New(s->st_dev));
/* inode number */
stats->Set(ino_symbol, Integer::New(s->st_ino));
/* protection */
stats->Set(mode_symbol, Integer::New(s->st_mode));
/* number of hard links */
stats->Set(nlink_symbol, Integer::New(s->st_nlink));
/* user ID of owner */
stats->Set(uid_symbol, Integer::New(s->st_uid));
/* group ID of owner */
stats->Set(gid_symbol, Integer::New(s->st_gid));
/* device ID (if special file) */
stats->Set(rdev_symbol, Integer::New(s->st_rdev));
/* total size, in bytes */
stats->Set(size_symbol, Number::New(s->st_size));
/* blocksize for filesystem I/O */
stats->Set(blksize_symbol, Integer::New(s->st_blksize));
/* number of blocks allocated */
stats->Set(blocks_symbol, Integer::New(s->st_blocks));
/* time of last access */
stats->Set(atime_symbol, NODE_UNIXTIME_V8(s->st_atime));
/* time of last modification */
stats->Set(mtime_symbol, NODE_UNIXTIME_V8(s->st_mtime));
/* time of last status change */
stats->Set(ctime_symbol, NODE_UNIXTIME_V8(s->st_ctime));
return scope.Close(stats);
}
static Handle<Value> Stat(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(stat, args[1], *path)
} else {
struct stat s;
int ret = stat(*path, &s);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return scope.Close(BuildStatsObject(&s));
}
}
static Handle<Value> LStat(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(lstat, args[1], *path)
} else {
struct stat s;
int ret = lstat(*path, &s);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return scope.Close(BuildStatsObject(&s));
}
}
static Handle<Value> FStat(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
if (args[1]->IsFunction()) {
ASYNC_CALL(fstat, args[1], fd)
} else {
struct stat s;
int ret = fstat(fd, &s);
if (ret != 0) return ThrowException(ErrnoException(errno));
return scope.Close(BuildStatsObject(&s));
}
}
static Handle<Value> Symlink(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value dest(args[0]->ToString());
String::Utf8Value path(args[1]->ToString());
if (args[2]->IsFunction()) {
ASYNC_CALL(symlink, args[2], *dest, *path)
} else {
int ret = symlink(*dest, *path);
if (ret != 0) return ThrowException(ErrnoException(errno));
return Undefined();
}
}
static Handle<Value> Link(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value orig_path(args[0]->ToString());
String::Utf8Value new_path(args[1]->ToString());
if (args[2]->IsFunction()) {
ASYNC_CALL(link, args[2], *orig_path, *new_path)
} else {
int ret = link(*orig_path, *new_path);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *orig_path));
return Undefined();
}
}
static Handle<Value> ReadLink(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(readlink, args[1], *path)
} else {
ssize_t bz = readlink(*path, getbuf, ARRAY_SIZE(getbuf) - 1);
if (bz == -1) return ThrowException(ErrnoException(errno, NULL, "", *path));
getbuf[ARRAY_SIZE(getbuf) - 1] = '\0';
return scope.Close(String::New(getbuf, bz));
}
}
static Handle<Value> Rename(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value old_path(args[0]->ToString());
String::Utf8Value new_path(args[1]->ToString());
if (args[2]->IsFunction()) {
ASYNC_CALL(rename, args[2], *old_path, *new_path)
} else {
int ret = rename(*old_path, *new_path);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *old_path));
return Undefined();
}
}
static Handle<Value> Truncate(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
off_t len = args[1]->Uint32Value();
if (args[2]->IsFunction()) {
ASYNC_CALL(ftruncate, args[2], fd, len)
} else {
int ret = ftruncate(fd, len);
if (ret != 0) return ThrowException(ErrnoException(errno));
return Undefined();
}
}
static Handle<Value> Fdatasync(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
if (args[1]->IsFunction()) {
ASYNC_CALL(fdatasync, args[1], fd)
} else {
#if HAVE_FDATASYNC
int ret = fdatasync(fd);
#else
int ret = fsync(fd);
#endif
if (ret != 0) return ThrowException(ErrnoException(errno));
return Undefined();
}
}
static Handle<Value> Fsync(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
if (args[1]->IsFunction()) {
ASYNC_CALL(fsync, args[1], fd)
} else {
int ret = fsync(fd);
if (ret != 0) return ThrowException(ErrnoException(errno));
return Undefined();
}
}
static Handle<Value> Unlink(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(unlink, args[1], *path)
} else {
int ret = unlink(*path);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return Undefined();
}
}
static Handle<Value> RMDir(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(rmdir, args[1], *path)
} else {
int ret = rmdir(*path);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return Undefined();
}
}
static Handle<Value> MKDir(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsString() || !args[1]->IsInt32()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
mode_t mode = static_cast<mode_t>(args[1]->Int32Value());
if (args[2]->IsFunction()) {
ASYNC_CALL(mkdir, args[2], *path, mode)
} else {
int ret = mkdir(*path, mode);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return Undefined();
}
}
static Handle<Value> SendFile(const Arguments& args) {
HandleScope scope;
if (args.Length() < 4 ||
!args[0]->IsUint32() ||
!args[1]->IsUint32() ||
!args[2]->IsUint32() ||
!args[3]->IsUint32()) {
return THROW_BAD_ARGS;
}
int out_fd = args[0]->Uint32Value();
int in_fd = args[1]->Uint32Value();
off_t in_offset = args[2]->Uint32Value();
size_t length = args[3]->Uint32Value();
if (args[4]->IsFunction()) {
ASYNC_CALL(sendfile, args[4], out_fd, in_fd, in_offset, length)
} else {
ssize_t sent = eio_sendfile_sync (out_fd, in_fd, in_offset, length);
// XXX is this the right errno to use?
if (sent < 0) return ThrowException(ErrnoException(errno));
return Integer::New(sent);
}
}
static Handle<Value> ReadDir(const Arguments& args) {
HandleScope scope;
if (args.Length() < 1 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
if (args[1]->IsFunction()) {
ASYNC_CALL(readdir, args[1], *path, 0 /*flags*/)
} else {
DIR *dir = opendir(*path);
if (!dir) return ThrowException(ErrnoException(errno, NULL, "", *path));
struct dirent *ent;
Local<Array> files = Array::New();
char *name;
int i = 0;
while ((ent = readdir(dir))) {
name = ent->d_name;
if (name[0] != '.' || (name[1] && (name[1] != '.' || name[2]))) {
files->Set(Integer::New(i), String::New(name));
i++;
}
}
closedir(dir);
return scope.Close(files);
}
}
static Handle<Value> Open(const Arguments& args) {
HandleScope scope;
if (args.Length() < 3 ||
!args[0]->IsString() ||
!args[1]->IsInt32() ||
!args[2]->IsInt32()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
int flags = args[1]->Int32Value();
mode_t mode = static_cast<mode_t>(args[2]->Int32Value());
if (args[3]->IsFunction()) {
ASYNC_CALL(open, args[3], *path, flags, mode)
} else {
int fd = open(*path, flags, mode);
if (fd < 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return scope.Close(Integer::New(fd));
}
}
#define GET_OFFSET(a) (a)->IsInt32() ? (a)->IntegerValue() : -1;
// bytesWritten = write(fd, data, position, enc, callback)
// Wrapper for write(2).
//
// 0 fd integer. file descriptor
// 1 buffer the data to write
// 2 offset where in the buffer to start from
// 3 length how much to write
// 4 position if integer, position to write at in the file.
// if null, write from the current position
static Handle<Value> Write(const Arguments& args) {
HandleScope scope;
if (!args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
if (!Buffer::HasInstance(args[1])) {
return ThrowException(Exception::Error(
String::New("Second argument needs to be a buffer")));
}
Local<Object> buffer_obj = args[1]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[2]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
ssize_t len = args[3]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
off_t pos = GET_OFFSET(args[4]);
char * buf = (char*)buffer_data + off;
Local<Value> cb = args[5];
if (cb->IsFunction()) {
// Grab a reference to buffer so it isn't GCed
Local<Object> cb_obj = cb->ToObject();
cb_obj->Set(buf_symbol, buffer_obj);
ASYNC_CALL(write, cb, fd, buf, len, pos)
} else {
ssize_t written = pos < 0 ? write(fd, buf, len) : pwrite(fd, buf, len, pos);
if (written < 0) return ThrowException(ErrnoException(errno, "write"));
return scope.Close(Integer::New(written));
}
}
/*
* Wrapper for read(2).
*
* bytesRead = fs.read(fd, buffer, offset, length, position)
*
* 0 fd integer. file descriptor
* 1 buffer instance of Buffer
* 2 offset integer. offset to start reading into inside buffer
* 3 length integer. length to read
* 4 position file position - null for current position
*
*/
static Handle<Value> Read(const Arguments& args) {
HandleScope scope;
if (args.Length() < 2 || !args[0]->IsInt32()) {
return THROW_BAD_ARGS;
}
int fd = args[0]->Int32Value();
Local<Value> cb;
size_t len;
off_t pos;
char * buf = NULL;
if (!Buffer::HasInstance(args[1])) {
return ThrowException(Exception::Error(
String::New("Second argument needs to be a buffer")));
}
Local<Object> buffer_obj = args[1]->ToObject();
char *buffer_data = Buffer::Data(buffer_obj);
size_t buffer_length = Buffer::Length(buffer_obj);
size_t off = args[2]->Int32Value();
if (off >= buffer_length) {
return ThrowException(Exception::Error(
String::New("Offset is out of bounds")));
}
len = args[3]->Int32Value();
if (off + len > buffer_length) {
return ThrowException(Exception::Error(
String::New("Length is extends beyond buffer")));
}
pos = GET_OFFSET(args[4]);
buf = buffer_data + off;
cb = args[5];
if (cb->IsFunction()) {
// Grab a reference to buffer so it isn't GCed
// TODO: need test coverage
Local<Object> cb_obj = cb->ToObject();
cb_obj->Set(buf_symbol, buffer_obj);
ASYNC_CALL(read, cb, fd, buf, len, pos);
} else {
// SYNC
ssize_t ret;
ret = pos < 0 ? read(fd, buf, len) : pread(fd, buf, len, pos);
if (ret < 0) return ThrowException(ErrnoException(errno));
Local<Integer> bytesRead = Integer::New(ret);
return scope.Close(bytesRead);
}
}
/* fs.chmod(fd, mode);
* Wrapper for chmod(1) / EIO_CHMOD
*/
static Handle<Value> Chmod(const Arguments& args) {
HandleScope scope;
if(args.Length() < 2 || !args[0]->IsString() || !args[1]->IsInt32()) {
return THROW_BAD_ARGS;
}
String::Utf8Value path(args[0]->ToString());
mode_t mode = static_cast<mode_t>(args[1]->Int32Value());
if(args[2]->IsFunction()) {
ASYNC_CALL(chmod, args[2], *path, mode);
} else {
int ret = chmod(*path, mode);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return Undefined();
}
}
/* fs.chown(fd, uid, gid);
* Wrapper for chown(1) / EIO_CHOWN
*/
static Handle<Value> Chown(const Arguments& args) {
HandleScope scope;
if (args.Length() < 3 || !args[0]->IsString()) {
return THROW_BAD_ARGS;
}
if (!args[1]->IsInt32() || !args[2]->IsInt32()) {
return ThrowException(Exception::Error(String::New("User and Group IDs must be an integer.")));
}
String::Utf8Value path(args[0]->ToString());
uid_t uid = static_cast<uid_t>(args[1]->Int32Value());
gid_t gid = static_cast<gid_t>(args[2]->Int32Value());
if (args[3]->IsFunction()) {
ASYNC_CALL(chown, args[3], *path, uid, gid);
} else {
int ret = chown(*path, uid, gid);
if (ret != 0) return ThrowException(ErrnoException(errno, NULL, "", *path));
return Undefined();
}
}
void File::Initialize(Handle<Object> target) {
HandleScope scope;
NODE_SET_METHOD(target, "close", Close);
NODE_SET_METHOD(target, "open", Open);
NODE_SET_METHOD(target, "read", Read);
NODE_SET_METHOD(target, "fdatasync", Fdatasync);
NODE_SET_METHOD(target, "fsync", Fsync);
NODE_SET_METHOD(target, "rename", Rename);
NODE_SET_METHOD(target, "truncate", Truncate);
NODE_SET_METHOD(target, "rmdir", RMDir);
NODE_SET_METHOD(target, "mkdir", MKDir);
NODE_SET_METHOD(target, "sendfile", SendFile);
NODE_SET_METHOD(target, "readdir", ReadDir);
NODE_SET_METHOD(target, "stat", Stat);
NODE_SET_METHOD(target, "lstat", LStat);
NODE_SET_METHOD(target, "fstat", FStat);
NODE_SET_METHOD(target, "link", Link);
NODE_SET_METHOD(target, "symlink", Symlink);
NODE_SET_METHOD(target, "readlink", ReadLink);
NODE_SET_METHOD(target, "unlink", Unlink);
NODE_SET_METHOD(target, "write", Write);
NODE_SET_METHOD(target, "chmod", Chmod);
NODE_SET_METHOD(target, "chown", Chown);
errno_symbol = NODE_PSYMBOL("errno");
encoding_symbol = NODE_PSYMBOL("node:encoding");
buf_symbol = NODE_PSYMBOL("__buf");
}
void InitFs(Handle<Object> target) {
HandleScope scope;
// Initialize the stats object
Local<FunctionTemplate> stat_templ = FunctionTemplate::New();
stats_constructor_template = Persistent<FunctionTemplate>::New(stat_templ);
target->Set(String::NewSymbol("Stats"),
stats_constructor_template->GetFunction());
StatWatcher::Initialize(target);
File::Initialize(target);
}
} // end namespace node
NODE_MODULE(node_fs, node::InitFs);