link(2)

Link to a file 

access(2)

Determine accessibility of a file 

mknod(2)

Make a special or ordinary file 

chmod(2)

Change mode of file 

chown(2), lchown(2), fchown(2)

Change owner and group of a file 

utime(2)

Set file access and modification times 

stat(2), lstat(2), fstat(2)

Get file status 

fcntl(2)

Perform file control functions 

ioctl(2)

Control device 

fpathconf(2)

Get configurable path name variables 

opendir(3C), readdir(3C), closedir(3C)

Perform directory operations 

mkdir(2)

Make a directory 

readlink(2)

Read the value of a symbolic link 

rename(2)

Change the name of a file 

rmdir(2)

Remove a directory 

symlink(2)

Make a symbolic link to a file