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ACL_ADD_PERM(3) 		   BSD Library Functions Manual 		  ACL_ADD_PERM(3)

     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 to the per-
     mission 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.

     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:

     [EINVAL]		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)

     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@computer.org>.

Linux ACL				  March 23, 2002				Linux ACL
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