9.58 fchown ¶

int fchown(int dir_fd, char *path, int len, uint32_t user, uint32_t group,
   int flags);

This syscall sets the owner’s UID and GID for the passed arguments in the same way fstat fetches information for the passed arguments.

The syscall returns 0 on success or -1 on failure, with the following errno:

EINVAL

The passed FD or the user and group were not valid.

EACCES

MAC did not allow this.

EBADF

The passed file is valid but it was not a physical file in a filesystem.