acl_set_qualifier(3) [redhat man page]

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 argu-
     ment 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@computer.org>.

Linux ACL							  March 23, 2002							 Linux ACL

ACL_GET_QUALIFIER(3)					   BSD Library Functions Manual 				      ACL_GET_QUALIFIER(3)

NAME

     acl_get_qualifier -- retrieve the qualifier from an ACL entry

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

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

     void *
     acl_get_qualifier(acl_entry_t entry_d);

DESCRIPTION

     The acl_get_qualifier() function is a POSIX.1e call that retrieves the qualifier of the tag for the ACL entry indicated by the argument
     entry_d into working storage and returns a pointer to that storage.

     If the value of the tag type in the ACL entry referred to by entry_d is ACL_USER, then the value returned by acl_get_qualifier() will be a
     pointer to 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 returned by acl_get_qualifier() will be a
     pointer to type gid_t.

     If the value of the tag type in the ACL entry referred to by entry_d is ACL_UNDEFINED_TAG, ACL_USER_OBJ, ACL_GROUP_OBJ, ACL_OTHER, ACL_MASK,
     or an implementation-defined value for which a qualifier is not supported, then acl_get_qualifier() will return a value of (void *)NULL and
     the function will fail.

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

RETURN VALUES

     The acl_get_qualifier() function returns a pointer to the allocated storage if successful; otherwise a NULL pointer is returned and the
     global variable errno is set to indicate the error.

ERRORS

     The acl_get_qualifier() fails if:

     [EINVAL]		Argument entry_d does not point to a valid descriptor for an ACL entry.  The value of the tag type in the ACL entry refer-
			enced by argument entry_d is not ACL_USER or ACL_GROUP.

     [ENOMEM]		The value to be returned requires more memory than is allowed by the hardware or system-imposed memory management con-
			straints.

SEE ALSO

     acl(3), acl_create_entry(3), acl_free(3), acl_get_entry(3), acl_get_tag_type(3), acl_set_qualifier(3), acl_set_tag_type(3), posix1e(3)

STANDARDS

     POSIX.1e is described in IEEE POSIX.1e draft 17.

HISTORY

     POSIX.1e support was introduced in FreeBSD 4.0.  The acl_get_qualifier() function was added in FreeBSD 5.0.

AUTHORS

     The acl_get_qualifier() function was written by Chris D. Faulhaber <jedgar@fxp.org>.

BSD
								  March 13, 2001							       BSD