POSIX_SPAWN_FILE_ACTIONS_ADDOPEN (man3p)
posix_spawn_file_actions_addopen — add open action to spawn file actions object (ADVANCED REALTIME)
posix_spawn_file_actions_addopen — add open action to spawn file actions object (ADVANCED REALTIME)
vfscanf, vscanf, vsscanf — format input of a stdarg argument list
wcscspn — get the length of a complementary wide substring
pthread_attr_init — initialize the thread attributes object
duplocale — duplicate a locale object
fgetpos — get current file position information
fesetenv — set current floating-point environment
fnmatch — match a filename string or a pathname
tcsendbreak — send a break for a specific duration
nftw — walk a file tree