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
〈a.gruenbacher@bestbits.at〉.