/*
* Set file permissions.
* If user is a memeber of "users" group, then set file as owned by and writeable by "users" group.
*/
void Utils::setFilePerms(const QString &file, const char *groupName)
{
//
// Clear any umask before setting file perms
mode_t oldMask(umask(0000));
gid_t gid=getGroupId(groupName);
QByteArray fn=QFile::encodeName(file);
::chmod(fn.constData(), 0==gid ? 0644 : 0664);
if (0!=gid) {
int rv=::chown(fn.constData(), geteuid(), gid);
Q_UNUSED(rv)
}
void ClusteredClearing::crossMUX ( double probM, Cluster &clus, char** mates,
int numMates, char* off, int size ) {
int numDiferences = 0;
string oldMask (clus.mask);
//memcpy( oldMask, clus.mask, size * sizeof( char ) );
memcpy( off, population[clus.cIndex], size * sizeof( char ) );
int *perm = new int[ size ];
random->RandPerm( perm, size );
if ( !repulse ) { // probM -> chance to get bits from mates
for ( int i = 0; i < size; i++ ) {
int cIndex = perm[ i ];
// oldMask = 0 bit protected -> do nothing
if ( oldMask.compare(cIndex,1,"1") == 0 ) {
double probs1 = 0;
double probChange = 0;
for ( int j = 0; j < numMates; j++ ) {
probs1 += mates[ j ][ cIndex ];
}
probs1 = probs1 / numMates;
if ( off[ cIndex ] == 1 )
probChange = 1.0 - probs1;
else
probChange = probs1;
// If no change -> flip random unprotected bit
if ( random->Rand() < ( probChange * probM ) ) {
off[ cIndex ] = 1 - off[ cIndex ];
numDiferences++;
clus.numProtected++;
clus.mask.replace(cIndex,1,"0");
}
}
}
} else { // Repulse -> probM = chance to not get bits from mates
for ( int i = 0; i < size; i++ ) {
int cIndex = perm[ i ];
if ( oldMask.compare(cIndex,1,"1") == 0 ) {
double probs1 = 0;
double probChange = 0;
for ( int j = 0; j < numMates; j++ ) {
probs1 += mates[ j ][ cIndex ];
}
probs1 = probs1 / numMates;
if ( off[ cIndex ] == 0 ) // repulsa
probChange = 1.0 - probs1;
else
probChange = probs1;
if ( random->Rand() < ( probChange * probM ) ) {
off[ cIndex ] = 1 - off[ cIndex ];
numDiferences++;
clus.numProtected++;
clus.mask.replace(cIndex,1,"0");
}
}
}
}
// Si tras recorrer offspring no cambiamos ningún bit, cambiamos uno
// aleatoriamente que no este protegido
if ( numDiferences == 0 ) {
for ( int i = 0; i < size; i++ ) {
if ( oldMask.compare(perm[i],1,"1") == 0) {
off[ perm[ i ] ] = 1 - off[ perm[ i ] ];
numDiferences++;
clus.numProtected++;
clus.mask.replace(perm[i],1,"0");
break;
}
}
}
delete [] perm;
//delete [] oldMask;
}
