apue_chown.h

#include <unistd.h>

int chown(const char *pathname, uid_t owner, gid_t group);
int fchown(int fd, uid_t owner, gid_t group);
int fchownat(int fd, const char *pathname, uid_t owner, gid_t group, int flag);
int lchown(const char *pathname, uid_t owner, gid_t group);

/* All four return: 0 if OK, −1 on error */