C++ (Cpp) MappingTable::isolate Examples

Example #1

File: Isolation.cpp Project: bhushanjain/cse508

void Alcatraz::truncate_entry()
{
    CString arg0(getArgRep(0)) ;
    pid_t pid = mp->pid() ;
    ArchDep *arch = mp->getArch() ;

    char normpath[PATH_MAX], buf[PATH_MAX] ;
    /* first get the real path of the file */

    normalizePath(arg0.get().c_str(), normpath) ;
    int maptype = translatePath(normpath, buf, true);
    switch (maptype) {
    case PATH_NOTALLOWED:
	arch->abortCall(pid, -1, ENOENT) ;
	break ;
    case PATH_DELETED:
	arch->abortCall(pid, -1, ENOENT) ;
	break ;
    case PATH_CREATED:
    case PATH_MODIFIED:{
#ifdef INSTALL_SHIELD
	pid_t ppid = mp->ppid() ;
	mod_log("F", normpath, buf, "MD", pid, ppid) ;
#endif
	arg0.set(buf) ;
	break ;
    }
    case PATH_NEW: {
	int retval = truncate_failure(buf) ;
	if (retval != 0) {
	    arch->abortCall(pid, -1, retval) ;
	}
	else {
	    char tempfile[PATH_MAX] ;
	    mt.isolate(buf, tempfile, false) ;
#ifdef INSTALL_SHIELD
	    pid_t ppid = mp->ppid() ;
	    mod_log("F", normpath, tempfile, "MD", pid, ppid) ;
#endif
	    arg0.set(tempfile) ;
	}
	break ;
    }
    }
}

Example #2

File: Isolation.cpp Project: bhushanjain/cse508

void Alcatraz::open_entry()
{
    CString arg0(getArgRep(0)) ;
    Integer arg1(getArgRep(1)) ;
    pid_t pid = mp->pid() ;
    ArchDep *arch = mp->getArch() ;

    char normpath[PATH_MAX], buf[PATH_MAX] ;
    int maptype ;

    if (strncmp("/.a_to_GUI", arg0.get().c_str(), 10) == 0) {
	mt.mapping.sendtoGUI(false) ;
	arch->abortCall(pid, -1, EPERM) ;
	return ;
    }

    if (strncmp("/.alcatraz", arg0.get().c_str(), 10) == 0) {
	arg0.set(arg0.get().c_str()+10) ;
	arg1.set(0) ;
	return ;
    }

    // check open modes
    int flag = arg1.get() ;
    bool readonly = true ;
    if (flag&O_WRONLY || flag&O_RDWR || flag&O_CREAT)
	readonly = false ;
    bool trunc = false ;
    if (!readonly && flag&O_TRUNC)
	trunc = true ;

    normalizePath(arg0.get().c_str(), normpath) ;
    maptype = translatePath(normpath, buf, true, tempname);
    // Remember the association between file descriptors and path names
    // It remembers the canonized name
    char *tmp ;
    if (PATH_NEW == maptype)
	tmp = buf ;
    else tmp = normpath ;
    size_t strsize = strlen(tmp) + 1 ;
    char *duppath = new char[strsize] ;
    if (0 != duppath) {
	memcpy(duppath, tmp, strsize) ;
    }
    ProcData *pData = processData.lookUp(pid) ;
    if (0 == pData) {
	pData = new ProcData() ;
	processData.insert(pid, pData) ;
    }
    pData->storeOpenName(duppath) ;

    switch(maptype) {
    case PATH_NOTALLOWED:
	arch->abortCall(pid, -1, ENOENT);
	break; 
    case PATH_CREATED:
    case PATH_MODIFIED:
#ifdef INSTALL_SHIELD
	if (!readonly) {
	    pid_t ppid = mp->ppid() ;
	    mt.mapping.appendTime(normpath, pid, ppid) ;
	    if (access(buf, F_OK) == 0)
		mod_log("F", normpath, buf, "MD", pid, ppid) ;
	    else 
		mod_log("F", normpath, buf, "CR", pid, ppid) ;
	}
#endif
	arg0.set(buf) ;
	break ;
    case PATH_DELETED: {
	if (readonly)
	    arch->abortCall(pid, -1, ENOENT) ;
	else {
	    /* create a new file, delete previous entry and
	       generate a new temp file */
	    char tempfile[PATH_MAX] ;
	    mt.delMapping(tempname) ;
	    mt.newEntry(TYPE_FILE, PATH_MODIFIED, tempname, tempfile) ;
	    arg0.set(tempfile) ;
#ifdef INSTALL_SHIELD
	    pid_t ppid = mp->ppid() ;
	    mod_log("F", normpath, tempfile, "CR", pid, ppid) ;
#endif
	}
	break ;
    }
    case PATH_NEW: {
	if (!readonly){
	    if (access(buf, F_OK)==0) { /* File exists */
		struct stat statbuf ;
		if (stat(buf, &statbuf) == 0){/*success*/
		    if (!S_ISREG(statbuf.st_mode)) break ;
		}

		if (access(buf, W_OK) == 0) {
		    /* can write, isolate file */
		    char tempfile[PATH_MAX] ;
		    mt.isolate(buf, tempfile, trunc) ;
		    arg0.set(tempfile) ;
#ifdef INSTALL_SHIELD
	            pid_t ppid = mp->ppid() ;
		    mod_log("F", normpath, tempfile, "MD", pid, ppid) ;
#endif

		}
	    }
	    else { /* File Not Exists */
		if (parent_writable(buf)) {
		    char tempfile[PATH_MAX] ;
		    mt.newEntry(TYPE_FILE, PATH_CREATED, buf, tempfile) ;
		    //		    mt.getStatus(normpath, buf) ;
		    arg0.set(tempfile) ;
#ifdef INSTALL_SHIELD
	            pid_t ppid = mp->ppid() ;
		    mod_log("F", normpath, tempfile, "CR", pid, ppid) ;
#endif
		}
	    }
	}
	else {
	    arg0.set(buf) ;
	}
	break ;
    }
    default:
	break ;
    }
    
}