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     acl_get_file - get an ACL by filename


     Linux Access Control Lists library (libacl, -lacl).


     #include <sys/types.h>
     #include <sys/acl.h>

     acl_get_file(const char *path_p, acl_type_t type);


     The acl_get_file() function retrieves the access ACL associated with a
     file or directory, or the default ACL associated with a directory. The
     pathname for the file or directory is pointed to by the argument path_p.
     The ACL is placed into working storage and acl_get_file() returns a
     pointer to that storage.

     In order to read an ACL from an object, a process must have read access
     to the object’s attributes.

     The value of the argument type is used to indicate whether the access ACL
     or the default ACL associated with path_p is returned. If type is
     ACL_TYPE_ACCESS, the access ACL of path_p is returned. If type is
     ACL_TYPE_DEFAULT, the default ACL of path_p is returned. If type is
     ACL_TYPE_DEFAULT and no default ACL is associated with the directory
     path_p, then an ACL containing zero ACL entries is returned. If type
     specifies a type of ACL that cannot be associated with path_p, then the
     function fails.

     This function may cause memory to be allocated.  The caller should free
     any releasable memory, when the new ACL is no longer required, by calling
     acl_free(3) with the (void*)acl_t returned by acl_get_file() as an


     On success, this function returns a pointer to the working storage.  On
     error, a value of (acl_t)NULL is returned, and errno is set


     If any of the following conditions occur, the acl_get_file() function
     returns a value of (acl_t)NULL and sets errno to the corresponding value:

     [EACCES]           Search permission is denied for a component of the
                        path prefix or the object exists and the process does
                        not have appropriate access rights.

                        Argument type specifies a type of ACL that cannot be
                        associated with path_p.

     [EINVAL]           The argument type is not ACL_TYPE_ACCESS or

     [ENAMETOOLONG]     The length of the argument path_p is too long.

     [ENOENT]           The named object does not exist or the argument path_p
                        points to an empty string.

     [ENOMEM]           The ACL working storage requires more memory than is
                        allowed by the hardware or system-imposed memory
                        management constraints.

     [ENOTDIR]          A component of the path prefix is not a directory.

     [ENOTSUP]          The file system on which the file identified by path_p
                        is located does not support ACLs, or ACLs are


     IEEE Std 1003.1e draft 17 (“POSIX.1e”, abandoned)


     acl_free(3), acl_get_entry(3), acl_get_fd(3), acl_set_file(3), acl(5)


     Derived from the FreeBSD manual pages written by Robert N M Watson
     〈〉, and adapted for Linux by Andreas Gruenbacher