acl_set_qualifier

ACL_SET_QUALIFIER(3)      BSD Library Functions Manual      ACL_SET_QUALIFIER(3)

NAME
     acl_set_qualifier — set the qualifier of an ACL entry

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

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

     int
     acl_set_qualifier(acl_entry_t entry_d, const void *qualifier_p);

DESCRIPTION
     The acl_set_qualifier() function sets the qualifier of the ACL entry
     indicated by the argument entry_d to the value referred to by the argument
     qualifier_p.  If the value of the tag type in the ACL entry referred to by
     entry_d is ACL_USER, then the value referred to by qualifier_p shall be of
     type uid_t.  If the value of the tag type in the ACL entry referred to by
     entry_d is ACL_GROUP, then the value referred to by qualifier_p shall be of
     type gid_t.  If the value of the tag type in the ACL entry referred to by
     entry_d is a tag type for which a qualifier is not supported,
     acl_set_qualifier() returns an error.

     Any ACL entry descriptors that refer to the entry referred to by entry_d
     continue to refer to that entry. This function may cause memory to be
     allocated. The caller should free any releasable memory, when the ACL is no
     longer required, by calling acl_free() with a pointer to the ACL as
     argument.

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

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

     [EINVAL]           The argument entry_d is not a valid descriptor for an
                        ACL entry.

                        The value of the tag type in the ACL entry referenced by
                        the argument entry_d is neither ACL_USER nor ACL_GROUP.

                        The value pointed to by the argument qualifier_p is not
                        valid.

     [ENOMEM]           The acl_set_qualifier() function is unable to allocate
                        the memory required for the ACL qualifier.

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

SEE ALSO
     acl_create_entry(3), acl_free(3), acl_get_permset(3), acl_get_qualifier(3),
     acl_get_tag_type(3), acl_set_entry(3), acl_set_permset(3),
     acl_set_tag_type(3), acl(5)

AUTHOR
     Derived from the FreeBSD manual pages written by Robert N M Watson
     <rwatson@FreeBSD.org>, and adapted for Linux by Andreas Gruenbacher
     <andreas.gruenbacher@gmail.com>.

Linux ACL                        March 23, 2002                        Linux ACL