FSSH_S_IRGRP
#define S_IRGRP FSSH_S_IRGRP
#define FSSH_DEFFILEMODE (FSSH_S_IRUSR | FSSH_S_IWUSR | FSSH_S_IRGRP \
permissions += ((mode & FSSH_S_IRGRP) ? 'r' : '-');
SET_ST_MODE_BIT(FSSH_S_IRGRP, S_IRGRP);
SET_ST_MODE_BIT(FSSH_S_IRGRP, S_IRGRP);