const char *set_get_value(struct opt_set *set, const char *user)
{
struct opt_set *p = set;
char *key;
int match = 0;
if (!user || !set) {
return NULL;
}
while (p) {
key = p->key;
if (*key != '@') { //user
if (0 == strcmp(key, user)) {
match = 1;
}
} else if (*(key+1) == '\0') { /* "@" match all */
match = 1;
} else { /* Group */
if (is_user_in_group(user, key + 1)) {
match = 1;
}
}
if (match) {
return p->value;
}
p = p->next;
}
return NULL;
}
static int db_can_write_to_directory(backend_store_interface* i, const char* rel_path) {
size_t end = strlen(rel_path) - 1;
char dir_path[end + 2];
strncpy(dir_path, rel_path, end + 2);
logger_logf(LOG(i), "rel_path = %s, dir_path = %s", rel_path, dir_path);
/* Need to make sure user can write to all directories above this one */
while (end > 0) {
while (dir_path[end] != '/') {
--end;
}
dir_path[end] = '\0';
if (end == 0) {
break;
}
long dir_mode = get_mode(dir_path);
long dir_uid = get_uid(dir_path);
long dir_gid = get_gid(dir_path);
int can_user_write_to_dir = fuse_get_context()->uid == dir_uid && (dir_mode & S_IWUSR);
int can_grp_write_to_dir = is_user_in_group(i, dir_gid) && (dir_mode & S_IWGRP);
if (!can_user_write_to_dir && !can_grp_write_to_dir) {
return 0;
}
--end;
}
return 1;
}
// CheckPermissions
status_t
Node::CheckPermissions(int mode) const
{
int userPermissions = (fMode & S_IRWXU) >> 6;
int groupPermissions = (fMode & S_IRWXG) >> 3;
int otherPermissions = fMode & S_IRWXO;
// get the permissions for this uid/gid
int permissions = 0;
uid_t uid = geteuid();
// user is root
if (uid == 0) {
// root has always read/write permission, but at least one of the
// X bits must be set for execute permission
permissions = userPermissions | groupPermissions | otherPermissions
| ACCESS_R | ACCESS_W;
// user is node owner
} else if (uid == fUID)
permissions = userPermissions;
// user is in owning group
else if (is_user_in_group(fGID))
permissions = groupPermissions;
// user is one of the others
else
permissions = otherPermissions;
// do the check
return ((mode & ~permissions) ? B_NOT_ALLOWED : B_OK);
}
/**
* Is the user allowed to see ("ascertain") if the passed file exists?
* If not, then they shouldn't see it when they "ls"
*
* You can ascertain the existence of a file if you have have privileges to read it
*/
static int db_can_ascertain_existence(backend_store_interface* i, const char* rel_path) {
logger_logf(LOG(i), "rel_path: %s", rel_path);
//if world can read, return true no matter what
if ((get_mode(rel_path) & S_IROTH) != 0) {
return 1;
}
return (get_uid(rel_path) == fuse_get_context()->uid || is_user_in_group(i, get_gid(rel_path)));
}
bool fuh::user_is_moderator(const std::string& name) {
if(!user_exists(name)) return false;
try {
return get_writable_detail_for_user<int>(name, "user_is_moderator") == 1 || is_user_in_group(name, mp_mod_group_);
} catch (const sql_error& e) {
ERR_UH << "Could not query user_is_moderator/MP Moderators group for user '" << name << "' :" << e.message << std::endl;
// If the database is down mark nobody as a mod
return false;
}
}
static int db_can_read(backend_store_interface* i, const char* rel_path) {
logger_logf(LOG(i), "rel_path = %s", rel_path);
if (!db_can_ascertain_existence(i, rel_path)) {
return 0;
}
long mode = get_mode(rel_path);
if (mode & S_IROTH) {
return 1;
}
if (get_uid(rel_path) == fuse_get_context()->uid && (mode & S_IRUSR)) {
return 1;
}
if (is_user_in_group(i, get_gid(rel_path)) && (mode & S_IRGRP)) {
return 1;
}
return 0;
}
void main_loop(pDataStruct workingData){
char *commandList[] = {"set", "get", "add", "delete","exit","help","ls","cat","cd"};
char *setList[] = {"date", "user", "group","help"};
char *getList[] = {"date", "user", "group", "workingDir","help", "userlist", "grouplist", "usersingroup"};
char *addList[] = {"user", "group", "file", "directory", "usertogroup","perm", "appendfile","help"};
char *deleteList[] = {"user", "group", "file", "directory", "usertogroup","perm", "filebytes","help"};
char arg[16][MAXCOMMAND];
char command[MAXCOMMAND];
int argnum, i, j, tempNum, cmd, size;
char *c;
char temp[MAXPATH];
char *tempBuf;
unsigned char *rcvBuf;
pNode tempNode = NULL;
pUser tempUser = NULL;
pGroup tempGroup = NULL;
pFile tempFile = NULL;
pPerms tempPerms = NULL;
pFileChunk tempFileChunk = NULL;
pGroupUserList tempGroupUserList = NULL;
while(1){
argnum = i = j = tempNum = cmd = 0;
c = 0;
bzero(temp, sizeof(temp));
tempBuf = NULL;
tempNode = NULL;
tempUser = NULL;
tempGroup = NULL;
tempFile = NULL;
tempPerms = NULL;
tempFileChunk = NULL;
tempGroupUserList = NULL;
bzero(command, sizeof(command));
print_prompt(workingData);
get_string(command, MAXCOMMAND-1, "");
for (j = 0;j<16;j++){
bzero(arg[j],MAXCOMMAND);
}
argnum = parse_arg(arg, command);
tempNum = 0;
cmd = 100;
for (i=0;i<sizeof(commandList)/4;i++){
if (strcmp(commandList[i],arg[0]) == 0 ){
cmd = i;
}
}
switch(cmd)
{
case 0x0 : //set
cmd = 100;
for (i=0;i<sizeof(setList)/4;i++){
if (strcmp(setList[i],arg[1]) == 0){
cmd = i;
}
}
switch(cmd)
{
case 0 : //set date
workingData->date = get_time();
break;//end set date
case 1 : //set user
if ( strcmp(arg[2],"") == 0){
puts("missing user name or number");
break;
}
tempUser = find_user(arg[2],workingData);
if ( tempUser != NULL ){
workingData->currentUser = tempUser;
} else {
printf("unknown user: @s\n",arg[2]);
}
break;//end set user
case 2 : //set group
if ( strcmp(arg[2], "") == 0){
puts("missing group name or number");
break;
}
tempGroup = find_group(arg[2], workingData);
if ( tempGroup != NULL){
workingData->currentGroup = tempGroup;
} else {
printf("unknown group: @s\n",arg[2]);
}
break;
case 3 : //set help
print_help(setList,(sizeof(setList)/4));
break;//end set help
default :
printf("Invalid command: @s\n",arg[1]);
}
break;//end set
case 1 ://get
cmd = 100;
for (i=0;i<sizeof(getList)/4;i++){
if (strcmp(getList[i],arg[1]) == 0){
cmd = i;
}
}
switch(cmd)
{
case 0 : //get date
strofdate( workingData->date);
break;//end get date
case 1 : //get user
printf("@s\n",workingData->currentUser->name);
break;//end get user
case 2 : //get group
printf("@s\n",workingData->currentGroup->name);
break;//end get group
case 3 : //get workingDir
bzero(temp,MAXPATH);
str_of_path( temp, workingData, workingData->workingDir);
printf("@s/\n",temp);
break;//end get workingDir
case 4 : //get help
print_help(getList,(sizeof(getList)/4));
break;//end get help
case 5 : //get userlist
print_user_list(workingData);
break;//end get userlist
case 6 : //get grouplist
print_group_list(workingData);
break;//end get grouplist
case 7 : //get usersingroup
if ( strcmp(arg[2], "") == 0){
puts("missing group name or number");
break;
}
tempGroup = find_group(arg[2], workingData);
if ( tempGroup != NULL ){
print_users_in_group(tempGroup);
break;
}
printf("unknown group: @s\n",arg[2]);
break;//end get useringroup
default :
printf("Invalid command: @s\n",arg[1]);
}
break;//end get
case 2 ://add
cmd = 100;
for (i=0;i<sizeof(addList)/4;i++){
if ( strcmp(addList[i],arg[1]) == 0 ){
cmd = i;
}
}
switch(cmd)
{
case 0 : //add user
if ( strcmp(arg[2],"") == 0 ){
bzero(temp,MAXPATH);
get_string(temp, 128, "UserName");
strcpy(arg[2],temp);
}
tempUser = find_user( arg[2], workingData);
if ( tempUser == NULL ){
add_user( arg[2], workingData );
} else {
puts("Username already in use");
}
break;//end add user
case 1 : //add group
if ( strcmp(arg[2],"") == 0 ){
bzero(temp,MAXPATH);
get_string(temp, 128, "GroupName");
strcpy(arg[2], temp);
}
tempGroup = find_group( arg[2], workingData);
if ( tempGroup == NULL ){
add_group( arg[2], workingData );
} else {
puts("Groupname already in use");
}
break;//end add group
case 2 : //add file
//add file name size
tempNum = atoi(arg[3]);
if (strcmp(arg[2],"") == 0){
puts("Filename required");
break;
}
if ( tempNum > MAXUPLOAD ){
puts("Too big");
break;
}
if ( find_node_by_name(arg[2],workingData->workingDir->directoryHeadNode) != NULL ){
puts("There is another file or directory with that name");
break;
}
if ( tempNum > 0){
rcvBuf = mallocOrDie(tempNum,"Failed to allocate tempBuf");
puts("-----Begin File-----");//five -
if ( tempNum != receive_bytes(rcvBuf,tempNum) ){
die("Failed to reveive file");
break;
}
} else {rcvBuf = NULL;}
tempNode = add_file( workingData->workingDir, workingData->date, tempNum, arg[2], (char *)rcvBuf, workingData->currentUser );
break;//end add file
case 3 : //add directory
if (strcmp(arg[2],"") == 0){
puts("Directory name required");
break;
}
if ( find_node_by_name(arg[2],workingData->workingDir->directoryHeadNode) != NULL ){
puts("There is another file or directory with that name");
break;
}
tempNode = add_directory( workingData->date, arg[2], workingData->workingDir, workingData->currentUser );
break;//end add directory
case 4 : //add useringroup
if (strcmp(arg[2],"") == 0){
puts("username or number required");
break;
}
tempUser = find_user( arg[2], workingData);
if ( tempUser != NULL ){//user exists
tempGroupUserList = is_user_in_group( tempUser, workingData->currentGroup );
if ( tempGroupUserList == NULL ){//user is not already in group
add_user_to_group( tempUser, workingData->currentGroup );
} else {printf("@s is already in @s\n",arg[2], workingData->currentGroup->name);}
} else {
puts("User does not exist, add user first");
}
break;//end add useringroup
case 5 : //add perm
if ( ( strcmp(arg[2],"") == 0 )||( strcmp(arg[2]," ") == 0 ) ){//arg[2] name of file or dir
puts("name of file or directory required");
break;
}
if (!( (strcmp(arg[3],"user") == 0) ^ (strcmp(arg[3],"group") == 0) )) {//arg[3] user, group
puts("'user' or 'group'");
break;
}
if (strcmp(arg[4],"") == 0){
puts("user name, group name, or number required");//arg[4] name or number of user or group
break;
}
tempNode = find_node_by_name(arg[2],workingData->workingDir->directoryHeadNode );//validate file or dir
if (tempNode == NULL){
puts("Invalid file or directory");
break;
}
if (tempNode->type == LINK){
tempNode = tempNode->directoryHeadNode;
break;
}
if (strcmp(arg[3],"user") == 0){
tempUser = find_user(arg[4],workingData);
tempGroup = NULL;
if (tempUser == NULL){
printf("user @s not found\n",arg[4]);
break;
}
} else {
tempGroup = find_group(arg[4],workingData);
tempUser = NULL;
if (tempGroup == NULL){
printf("group @s not found\n",arg[4]);
break;
}
}
validate_current_perms(tempNode, workingData);
tempPerms = add_perm(tempUser, tempGroup, tempNode );
break;//end add perm
case 6 : //add appendfile
tempNum = atoi(arg[3]);
if (strcmp(arg[2],"") == 0){
puts("Filename required");
break;
}
if ( tempNum > MAXUPLOAD ){
puts("Too big");
break;
}
tempFile = find_file_by_name(arg[2],workingData->workingDir);
if ( tempFile == NULL ){
puts("No file in working directory by that name");
break;
}
if ( tempNum > 0){
tempBuf = mallocOrDie(tempNum,"Failed to allocate tempBuf");
puts("-----Begin File-----");//five -
if ( tempNum != receive_bytes((unsigned char *)tempBuf,tempNum) ){
die("Failed to reveive file");
break;
}
} else {
tempBuf = NULL;
puts("Can not add 0 bytes to file");
break;
}
tempFileChunk = add_file_chunk( tempBuf, tempFile, tempNum );
break;//end add appendfile
case 7 : //add help
print_help(addList, (sizeof(addList)/4));
break;//end add help
default :
printf("Invalid command: @s\n",arg[1]);
}
break;//end add
case 3 ://delete
cmd = 100;
for (i=0;i<sizeof(deleteList)/4;i++){
if ( strcmp(deleteList[i],arg[1]) == 0 ){
cmd = i;
}
}
switch(cmd)
{
case 0 : //delete user
bzero(temp,MAXPATH);
if ( strcmp(arg[2],"") == 0 ){
get_string(temp, 128, "User Name or number");
strcpy(arg[2],temp);
}
tempUser = find_user( arg[2], workingData);
if ( tempUser != NULL ){
remove_user(tempUser , workingData );
} else {
puts("No such user found");
}
break;//end delete user
case 1 : //delete group
bzero(temp,MAXPATH);
if ( strcmp(arg[2],"") == 0 ){
get_string(temp, 128, "Group Name or number");
strcpy(arg[2],temp);
}
tempGroup = find_group( arg[2], workingData);
if ( tempGroup != NULL ){
remove_group(tempGroup , workingData );
} else {
puts("no such group found");
}
break;//end delete group
case 2 : //delete file
if (strcmp(arg[2],"") == 0){
puts("Filename required");
break;
}
tempNode = find_file_node_by_name(arg[2],workingData->workingDir);
if (tempNode == NULL){
puts("No such file");
break;
}
delete_node(tempNode, workingData);
break;//end delete file
case 3 : //delete directory
if (strcmp(arg[2],"") == 0){
puts("Directory name required");
break;
}
tempNode = find_directory_by_name(arg[2],workingData->workingDir);
if (tempNode == NULL){
puts("No such directory");
break;
}
delete_node(tempNode, workingData);
break;//end delete directory
case 4 : //delete usertogroup
if (strcmp(arg[2],"") == 0){
puts("User name required");
break;
}
if (strcmp(arg[3],"") == 0){
puts("group name required");
break;
}
tempUser = find_user(arg[2],workingData);
if (tempUser == NULL){
puts("No such user");
break;
}
tempGroup = find_group(arg[3],workingData);
if (tempGroup == NULL){
puts("No such group");
break;
}
tempGroupUserList = is_user_in_group(tempUser, tempGroup);
if (tempGroupUserList == NULL){
puts("User is not in group");
break;
}
remove_user_from_group(tempUser, tempGroup);
break;//end delete usertogroup
case 5 : //delete perm
if (strcmp(arg[3],"") == 0){
puts("User or group name required");
break;
}
if (strcmp(arg[2],"") == 0){
puts("file name required");
break;
}
tempNode = find_node_by_name(arg[2],workingData->workingDir->directoryHeadNode);
if (tempNode == NULL){
puts("No such file");
break;
}
tempPerms = find_perm_by_name(arg[3],tempNode,workingData);
if (tempPerms != NULL){
delete_perms(tempNode, tempPerms);
} else {
puts("No such user permission on file");
}
break;//end delete perm
case 6 : //delete filebytes [file] [numbytes]
if (strcmp(arg[2],"") == 0){
puts("Filename required");
break;
}
size = strict_atoi(arg[3]);
if (size == 0){
puts("zero bytes deleted");
break;
}
//validate file
tempNode = find_file_node_by_name(arg[2],workingData->workingDir);
tempFile = tempNode->file;
if (tempNode == NULL){
puts("No such file");
printf("@s\n",arg[2]);
break;
}
tempNum = get_file_size(tempFile);
if (size > tempNum){
puts("Too many bytes");
}
//tempNum is new file size
tempNum = tempNum - size;
delete_file_bytes(tempFile, tempNum);
break;//end delete file
case 7 : //delete help
print_help(deleteList, (sizeof(deleteList)/4));
break;//end delete help
default:
print_help(deleteList, (sizeof(deleteList)/4));
//break;//end delete help
}
break;//end delete
case 4 ://cgc_exit
puts("exiting");
goto cgc_exit;
break;
case 5 ://help
print_help(commandList, (sizeof(commandList)/4));
break;
case 6 ://ls
print_working_dir(workingData);
break;
case 7 ://cat
if (strcmp(arg[1],"") == 0){
puts("Filename required");
break;
}
tempFile = find_file_by_name(arg[1], workingData->workingDir);
if ( tempFile != NULL ){
tempFileChunk = tempFile->head;
puts("-----Begin File-----");//five -
while ( tempFileChunk != NULL ){
if (tempFileChunk->chunkSize != cgc_write(tempFileChunk,tempFileChunk->chunkSize)){
puts("file write failed");
}
/*
c = tempFileChunk->chunk;
for ( i = 0; i < tempFileChunk->chunkSize; i++ ){//putc each byte of every chunk
putc( *c);
c++;
}
*/
tempFileChunk = tempFileChunk->next;
}
puts("-----END File-----");//five -
}
break;
case 8 ://cd
if (strcmp(arg[1],"") == 0){
puts("directory required");
break;
}
if (strcmp(arg[1],"..") == 0){
if (workingData->workingDir->parent != NULL){
workingData->workingDir = workingData->workingDir->parent;
}
break;
}
tempNode = find_directory_by_name(arg[1],workingData->workingDir);
if ( tempNode != NULL ){
workingData->workingDir = tempNode;
break;
}
puts("No such directory in working directory");
break;//end cd
default :
printf("Invalid command @s\n",arg[0]);
print_help(commandList, (sizeof(commandList)/4));
}
}
cgc_exit:
return;
}
