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// mongo/shell/shell_utils_extended.cpp
/*
* Copyright 2010 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "pch.h"
#include <boost/filesystem/convenience.hpp>
#include <fstream>
#include "mongo/scripting/engine.h"
#include "mongo/shell/shell_utils.h"
#include "mongo/shell/shell_utils_launcher.h"
#include "mongo/util/file.h"
#include "mongo/util/md5.hpp"
#include "mongo/util/net/sock.h"
#include "mongo/util/text.h"
namespace mongo {
/**
* These utilities are thread safe but do not provide mutually exclusive access to resources
* identified by the caller. Dependent filesystem paths should not be accessed by different
* threads.
*/
namespace shell_utils {
BSONObj listFiles(const BSONObj& _args, void* data) {
BSONObj cd = BSON( "0" << "." );
BSONObj args = _args.isEmpty() ? cd : _args;
uassert( 10257 , "need to specify 1 argument to listFiles" , args.nFields() == 1 );
BSONArrayBuilder lst;
string rootname = args.firstElement().valuestrsafe();
boost::filesystem::path root( rootname );
stringstream ss;
ss << "listFiles: no such directory: " << rootname;
string msg = ss.str();
uassert( 12581, msg.c_str(), boost::filesystem::exists( root ) );
boost::filesystem::directory_iterator end;
boost::filesystem::directory_iterator i( root);
while ( i != end ) {
boost::filesystem::path p = *i;
BSONObjBuilder b;
b << "name" << p.generic_string();
b.appendBool( "isDirectory", is_directory( p ) );
if ( ! boost::filesystem::is_directory( p ) ) {
try {
b.append( "size" , (double)boost::filesystem::file_size( p ) );
}
catch ( ... ) {
i++;
continue;
}
}
lst.append( b.obj() );
i++;
}
BSONObjBuilder ret;
ret.appendArray( "", lst.done() );
return ret.obj();
}
BSONObj ls(const BSONObj& args, void* data) {
BSONArrayBuilder ret;
BSONObj o = listFiles(args, data);
if( !o.isEmpty() ) {
for( BSONObj::iterator i = o.firstElement().Obj().begin(); i.more(); ) {
BSONObj f = i.next().Obj();
string name = f["name"].String();
if( f["isDirectory"].trueValue() ) {
name += '/';
}
ret << name;
}
}
return BSON( "" << ret.arr() );
}
/** Set process wide current working directory. */
BSONObj cd(const BSONObj& args, void* data) {
#if defined(_WIN32)
std::wstring dir = toWideString( args.firstElement().String().c_str() );
if( SetCurrentDirectory(dir.c_str()) )
return BSONObj();
#else
string dir = args.firstElement().String();
if( chdir( dir.c_str() ) == 0 )
return BSONObj();
#endif
return BSON( "" << "change directory failed" );
}
BSONObj pwd(const BSONObj&, void* data) {
boost::filesystem::path p = boost::filesystem::current_path();
return BSON( "" << p.string() );
}
BSONObj hostname(const BSONObj&, void* data) {
return BSON( "" << getHostName() );
}
const int CANT_OPEN_FILE = 13300;
BSONObj cat(const BSONObj& args, void* data) {
BSONElement e = singleArg(args);
stringstream ss;
ifstream f(e.valuestrsafe());
uassert(CANT_OPEN_FILE, "couldn't open file", f.is_open() );
streamsize sz = 0;
while( 1 ) {
char ch = 0;
// slow...maybe change one day
f.get(ch);
if( ch == 0 ) break;
ss << ch;
sz += 1;
uassert(13301, "cat() : file to big to load as a variable", sz < 1024 * 1024 * 16);
}
return BSON( "" << ss.str() );
}
BSONObj md5sumFile(const BSONObj& args, void* data) {
BSONElement e = singleArg(args);
stringstream ss;
FILE* f = fopen(e.valuestrsafe(), "rb");
uassert(CANT_OPEN_FILE, "couldn't open file", f );
md5digest d;
md5_state_t st;
md5_init(&st);
enum {BUFLEN = 4*1024};
char buffer[BUFLEN];
int bytes_read;
while( (bytes_read = fread(buffer, 1, BUFLEN, f)) ) {
md5_append( &st , (const md5_byte_t*)(buffer) , bytes_read );
}
md5_finish(&st, d);
return BSON( "" << digestToString( d ) );
}
BSONObj mkdir(const BSONObj& args, void* data) {
boost::filesystem::create_directories(args.firstElement().String());
return BSON( "" << true );
}
BSONObj removeFile(const BSONObj& args, void* data) {
BSONElement e = singleArg(args);
bool found = false;
boost::filesystem::path root( e.valuestrsafe() );
if ( boost::filesystem::exists( root ) ) {
found = true;
boost::filesystem::remove_all( root );
}
BSONObjBuilder b;
b.appendBool( "removed" , found );
return b.obj();
}
/**
* @param args - [ name, byte index ]
* In this initial implementation, all bits in the specified byte are flipped.
*/
BSONObj fuzzFile(const BSONObj& args, void* data) {
uassert( 13619, "fuzzFile takes 2 arguments", args.nFields() == 2 );
scoped_ptr< File > f( new File() );
f->open( args.getStringField( "0" ) );
uassert( 13620, "couldn't open file to fuzz", !f->bad() && f->is_open() );
char c;
f->read( args.getIntField( "1" ), &c, 1 );
c = ~c;
f->write( args.getIntField( "1" ), &c, 1 );
return undefinedReturn;
// f close is implicit
}
BSONObj getHostName(const BSONObj& a, void* data) {
uassert( 13411, "getHostName accepts no arguments", a.nFields() == 0 );
char buf[260]; // HOST_NAME_MAX is usually 255
verify(gethostname(buf, 260) == 0);
buf[259] = '\0';
return BSON("" << buf);
}
void installShellUtilsExtended( Scope& scope ) {
scope.injectNative( "getHostName" , getHostName );
scope.injectNative( "removeFile" , removeFile );
scope.injectNative( "fuzzFile" , fuzzFile );
scope.injectNative( "listFiles" , listFiles );
scope.injectNative( "ls" , ls );
scope.injectNative( "pwd", pwd );
scope.injectNative( "cd", cd );
scope.injectNative( "cat", cat );
scope.injectNative( "hostname", hostname);
scope.injectNative( "md5sumFile", md5sumFile );
scope.injectNative( "mkdir" , mkdir );
}
}
}
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