acl_add_perm man page

acl_add_perm — add a permission to an ACL permission set


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


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

acl_add_perm(acl_permset_t permset_d, acl_perm_t perm);


The acl_add_perm() function adds the permission contained in the argument perm (one of ACL_READ, ACL_WRITE, ACL_EXECUTE) to the permission set referred to by the argument permset_d. An attempt to add a permission that is already contained in the permission set is not considered an error.

Any existing descriptors that refer to permset_d continue to refer to that permission set.

Return Value

The acl_add_perm() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.


If any of the following conditions occur, the acl_add_perm() function returns -1 and sets errno to the corresponding value:

The argument permset_d is not a valid descriptor for a permission set within an ACL entry.

The argument perm does not contain a valid acl_perm_t value.


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

See Also

acl_clear_perms(3), acl_delete_perm(3), acl_get_perm(3), acl_get_permset(3), acl_set_permset(3), acl(5)


Derived from the FreeBSD manual pages written by Robert N M Watson ⟨rwatson@FreeBSD.org⟩, and adapted for Linux by Andreas Gruenbacher ⟨a.gruenbacher@bestbits.at⟩.

Referenced By

acl(5), acl_clear_perms(3), acl_delete_perm(3), acl_get_perm(3), acl_get_permset(3), acl_set_permset(3).

Explore man page connections for acl_add_perm(3).

March 23, 2002