/* 
   Unix SMB/CIFS implementation.
   Samba system utilities for ACL support.
   Copyright (C) Jeremy Allison 2000.
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "includes.h"

/*
 This file wraps all differing system ACL interfaces into a consistent
 one based on the POSIX interface. It also returns the correct errors
 for older UNIX systems that don't support ACLs.

 The interfaces that each ACL implementation must support are as follows :

 int sys_acl_get_entry( SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
 int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
 int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p
 void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
 SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
 SMB_ACL_T sys_acl_get_fd(int fd)
 int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset);
 int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 char *sys_acl_to_text( SMB_ACL_T theacl, ssize_t *plen)
 SMB_ACL_T sys_acl_init( int count)
 int sys_acl_create_entry( SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
 int sys_acl_set_tag_type( SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
 int sys_acl_set_qualifier( SMB_ACL_ENTRY_T entry, void *qual)
 int sys_acl_set_permset( SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
 int sys_acl_valid( SMB_ACL_T theacl )
 int sys_acl_set_file( const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
 int sys_acl_set_fd( int fd, SMB_ACL_T theacl)
 int sys_acl_delete_def_file(const char *path)

 This next one is not POSIX complient - but we *have* to have it !
 More POSIX braindamage.

 int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)

 The generic POSIX free is the following call. We split this into
 several different free functions as we may need to add tag info
 to structures when emulating the POSIX interface.

 int sys_acl_free( void *obj_p)

 The calls we actually use are :

 int sys_acl_free_text(char *text) - free acl_to_text
 int sys_acl_free_acl(SMB_ACL_T posix_acl)
 int sys_acl_free_qualifier(void *qualifier, SMB_ACL_TAG_T tagtype)

*/

#if defined(HAVE_POSIX_ACLS)

/* Identity mapping - easy. */

int sys_acl_get_entry( SMB_ACL_T the_acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	return acl_get_entry( the_acl, entry_id, entry_p);
}

int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
	return acl_get_tag_type( entry_d, tag_type_p);
}

int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	return acl_get_permset( entry_d, permset_p);
}

void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
{
	return acl_get_qualifier( entry_d);
}

SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
{
	return acl_get_file( path_p, type);
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	return acl_get_fd(fd);
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
{
	return acl_clear_perms(permset);
}

int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	return acl_add_perm(permset, perm);
}

int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
#if defined(HAVE_ACL_GET_PERM_NP)
	/*
	 * Required for TrustedBSD-based ACL implementations where
	 * non-POSIX.1e functions are denoted by a _np (non-portable)
	 * suffix.
	 */
	return acl_get_perm_np(permset, perm);
#else
	return acl_get_perm(permset, perm);
#endif
}

char *sys_acl_to_text( SMB_ACL_T the_acl, ssize_t *plen)
{
	return acl_to_text( the_acl, plen);
}

SMB_ACL_T sys_acl_init( int count)
{
	return acl_init(count);
}

int sys_acl_create_entry( SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
	return acl_create_entry(pacl, pentry);
}

int sys_acl_set_tag_type( SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
	return acl_set_tag_type(entry, tagtype);
}

int sys_acl_set_qualifier( SMB_ACL_ENTRY_T entry, void *qual)
{
	return acl_set_qualifier(entry, qual);
}

int sys_acl_set_permset( SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
	return acl_set_permset(entry, permset);
}

int sys_acl_valid( SMB_ACL_T theacl )
{
	return acl_valid(theacl);
}

int sys_acl_set_file(const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
	return acl_set_file(name, acltype, theacl);
}

int sys_acl_set_fd( int fd, SMB_ACL_T theacl)
{
	return acl_set_fd(fd, theacl);
}

int sys_acl_delete_def_file(const char *name)
{
	return acl_delete_def_file(name);
}

int sys_acl_free_text(char *text)
{
	return acl_free(text);
}

int sys_acl_free_acl(SMB_ACL_T the_acl) 
{
	return acl_free(the_acl);
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return acl_free(qual);
}

#elif defined(HAVE_TRU64_ACLS)
/*
 * The interface to DEC/Compaq Tru64 UNIX ACLs
 * is based on Draft 13 of the POSIX spec which is
 * slightly different from the Draft 16 interface.
 * 
 * Also, some of the permset manipulation functions
 * such as acl_clear_perm() and acl_add_perm() appear
 * to be broken on Tru64 so we have to manipulate
 * the permission bits in the permset directly.
 */
int sys_acl_get_entry( SMB_ACL_T the_acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	SMB_ACL_ENTRY_T	entry;

	if (entry_id == SMB_ACL_FIRST_ENTRY && acl_first_entry(the_acl) != 0) {
		return -1;
	}

	errno = 0;
	if ((entry = acl_get_entry(the_acl)) != NULL) {
		*entry_p = entry;
		return 1;
	}

	return errno ? -1 : 0;
}

int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
	return acl_get_tag_type( entry_d, tag_type_p);
}

int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	return acl_get_permset( entry_d, permset_p);
}

void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
{
	return acl_get_qualifier( entry_d);
}

SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
{
	return acl_get_file((char *)path_p, type);
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	return acl_get_fd(fd, ACL_TYPE_ACCESS);
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
{
	*permset = 0;		/* acl_clear_perm() is broken on Tru64	*/

	return 0;
}

int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	if (perm & ~(SMB_ACL_READ | SMB_ACL_WRITE | SMB_ACL_EXECUTE)) {
		errno = EINVAL;
		return -1;
	}

	*permset |= perm;	/* acl_add_perm() is broken on Tru64	*/

	return 0;
}

int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	return *permset & perm;	/* Tru64 doesn't have acl_get_perm() */
}

char *sys_acl_to_text( SMB_ACL_T the_acl, ssize_t *plen)
{
	return acl_to_text( the_acl, plen);
}

SMB_ACL_T sys_acl_init( int count)
{
	return acl_init(count);
}

int sys_acl_create_entry( SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
	SMB_ACL_ENTRY_T entry;

	if ((entry = acl_create_entry(pacl)) == NULL) {
		return -1;
	}

	*pentry = entry;
	return 0;
}

int sys_acl_set_tag_type( SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
	return acl_set_tag_type(entry, tagtype);
}

int sys_acl_set_qualifier( SMB_ACL_ENTRY_T entry, void *qual)
{
	return acl_set_qualifier(entry, qual);
}

int sys_acl_set_permset( SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
	return acl_set_permset(entry, permset);
}

int sys_acl_valid( SMB_ACL_T theacl )
{
	acl_entry_t	entry;

	return acl_valid(theacl, &entry);
}

int sys_acl_set_file( const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
	return acl_set_file((char *)name, acltype, theacl);
}

int sys_acl_set_fd( int fd, SMB_ACL_T theacl)
{
	return acl_set_fd(fd, ACL_TYPE_ACCESS, theacl);
}

int sys_acl_delete_def_file(const char *name)
{
	return acl_delete_def_file((char *)name);
}

int sys_acl_free_text(char *text)
{
	/*
	 * (void) cast and explicit return 0 are for DEC UNIX
	 *  which just #defines acl_free_text() to be free()
	 */
	(void) acl_free_text(text);
	return 0;
}

int sys_acl_free_acl(SMB_ACL_T the_acl) 
{
	return acl_free(the_acl);
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return acl_free_qualifier(qual, tagtype);
}

#elif defined(HAVE_UNIXWARE_ACLS) || defined(HAVE_SOLARIS_ACLS)

/*
 * Donated by Michael Davidson <md@sco.COM> for UnixWare / OpenUNIX.
 * Modified by Toomas Soome <tsoome@ut.ee> for Solaris.
 */

/*
 * Note that while this code implements sufficient functionality
 * to support the sys_acl_* interfaces it does not provide all
 * of the semantics of the POSIX ACL interfaces.
 *
 * In particular, an ACL entry descriptor (SMB_ACL_ENTRY_T) returned
 * from a call to sys_acl_get_entry() should not be assumed to be
 * valid after calling any of the following functions, which may
 * reorder the entries in the ACL.
 *
 *	sys_acl_valid()
 *	sys_acl_set_file()
 *	sys_acl_set_fd()
 */

/*
 * The only difference between Solaris and UnixWare / OpenUNIX is
 * that the #defines for the ACL operations have different names
 */
#if defined(HAVE_UNIXWARE_ACLS)

#define	SETACL		ACL_SET
#define	GETACL		ACL_GET
#define	GETACLCNT	ACL_CNT

#endif


int sys_acl_get_entry(SMB_ACL_T acl_d, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	if (entry_id != SMB_ACL_FIRST_ENTRY && entry_id != SMB_ACL_NEXT_ENTRY) {
		errno = EINVAL;
		return -1;
	}

	if (entry_p == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (entry_id == SMB_ACL_FIRST_ENTRY) {
		acl_d->next = 0;
	}

	if (acl_d->next < 0) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->next >= acl_d->count) {
		return 0;
	}

	*entry_p = &acl_d->acl[acl_d->next++];

	return 1;
}

int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p)
{
	*type_p = entry_d->a_type;

	return 0;
}

int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	*permset_p = &entry_d->a_perm;

	return 0;
}

void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d)
{
	if (entry_d->a_type != SMB_ACL_USER
	    && entry_d->a_type != SMB_ACL_GROUP) {
		errno = EINVAL;
		return NULL;
	}

	return &entry_d->a_id;
}

/*
 * There is no way of knowing what size the ACL returned by
 * GETACL will be unless you first call GETACLCNT which means
 * making an additional system call.
 *
 * In the hope of avoiding the cost of the additional system
 * call in most cases, we initially allocate enough space for
 * an ACL with INITIAL_ACL_SIZE entries. If this turns out to
 * be too small then we use GETACLCNT to find out the actual
 * size, reallocate the ACL buffer, and then call GETACL again.
 */

#define	INITIAL_ACL_SIZE	16

SMB_ACL_T sys_acl_get_file(const char *path_p, SMB_ACL_TYPE_T type)
{
	SMB_ACL_T	acl_d;
	int		count;		/* # of ACL entries allocated	*/
	int		naccess;	/* # of access ACL entries	*/
	int		ndefault;	/* # of default ACL entries	*/

	if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) {
		errno = EINVAL;
		return NULL;
	}

	count = INITIAL_ACL_SIZE;
	if ((acl_d = sys_acl_init(count)) == NULL) {
		return NULL;
	}

	/*
	 * If there isn't enough space for the ACL entries we use
	 * GETACLCNT to determine the actual number of ACL entries
	 * reallocate and try again. This is in a loop because it
	 * is possible that someone else could modify the ACL and
	 * increase the number of entries between the call to
	 * GETACLCNT and the call to GETACL.
	 */
	while ((count = acl(path_p, GETACL, count, &acl_d->acl[0])) < 0
	    && errno == ENOSPC) {

		sys_acl_free_acl(acl_d);

		if ((count = acl(path_p, GETACLCNT, 0, NULL)) < 0) {
			return NULL;
		}

		if ((acl_d = sys_acl_init(count)) == NULL) {
			return NULL;
		}
	}

	if (count < 0) {
		sys_acl_free_acl(acl_d);
		return NULL;
	}

	/*
	 * calculate the number of access and default ACL entries
	 *
	 * Note: we assume that the acl() system call returned a
	 * well formed ACL which is sorted so that all of the
	 * access ACL entries preceed any default ACL entries
	 */
	for (naccess = 0; naccess < count; naccess++) {
		if (acl_d->acl[naccess].a_type & ACL_DEFAULT)
			break;
	}
	ndefault = count - naccess;
	
	/*
	 * if the caller wants the default ACL we have to copy
	 * the entries down to the start of the acl[] buffer
	 * and mask out the ACL_DEFAULT flag from the type field
	 */
	if (type == SMB_ACL_TYPE_DEFAULT) {
		int	i, j;

		for (i = 0, j = naccess; i < ndefault; i++, j++) {
			acl_d->acl[i] = acl_d->acl[j];
			acl_d->acl[i].a_type &= ~ACL_DEFAULT;
		}

		acl_d->count = ndefault;
	} else {
		acl_d->count = naccess;
	}

	return acl_d;
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	SMB_ACL_T	acl_d;
	int		count;		/* # of ACL entries allocated	*/
	int		naccess;	/* # of access ACL entries	*/

	count = INITIAL_ACL_SIZE;
	if ((acl_d = sys_acl_init(count)) == NULL) {
		return NULL;
	}

	while ((count = facl(fd, GETACL, count, &acl_d->acl[0])) < 0
	    && errno == ENOSPC) {

		sys_acl_free_acl(acl_d);

		if ((count = facl(fd, GETACLCNT, 0, NULL)) < 0) {
			return NULL;
		}

		if ((acl_d = sys_acl_init(count)) == NULL) {
			return NULL;
		}
	}

	if (count < 0) {
		sys_acl_free_acl(acl_d);
		return NULL;
	}

	/*
	 * calculate the number of access ACL entries
	 */
	for (naccess = 0; naccess < count; naccess++) {
		if (acl_d->acl[naccess].a_type & ACL_DEFAULT)
			break;
	}
	
	acl_d->count = naccess;

	return acl_d;
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d)
{
	*permset_d = 0;

	return 0;
}

int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	if (perm != SMB_ACL_READ && perm != SMB_ACL_WRITE
	    && perm != SMB_ACL_EXECUTE) {
		errno = EINVAL;
		return -1;
	}

	if (permset_d == NULL) {
		errno = EINVAL;
		return -1;
	}

	*permset_d |= perm;

	return 0;
}

int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	return *permset_d & perm;
}

char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p)
{
	int	i;
	int	len, maxlen;
	char	*text;

	/*
	 * use an initial estimate of 20 bytes per ACL entry
	 * when allocating memory for the text representation
	 * of the ACL
	 */
	len	= 0;
	maxlen	= 20 * acl_d->count;
	if ((text = SMB_MALLOC(maxlen)) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	for (i = 0; i < acl_d->count; i++) {
		struct acl	*ap	= &acl_d->acl[i];
		struct passwd	*pw;
		struct group	*gr;
		char		tagbuf[12];
		char		idbuf[12];
		char		*tag;
		char		*id	= "";
		char		perms[4];
		int		nbytes;

		switch (ap->a_type) {
			/*
			 * for debugging purposes it's probably more
			 * useful to dump unknown tag types rather
			 * than just returning an error
			 */
			default:
				slprintf(tagbuf, sizeof(tagbuf)-1, "0x%x",
					ap->a_type);
				tag = tagbuf;
				slprintf(idbuf, sizeof(idbuf)-1, "%ld",
					(long)ap->a_id);
				id = idbuf;
				break;

			case SMB_ACL_USER:
				id = uidtoname(ap->a_id);
			case SMB_ACL_USER_OBJ:
				tag = "user";
				break;

			case SMB_ACL_GROUP:
				if ((gr = getgrgid(ap->a_id)) == NULL) {
					slprintf(idbuf, sizeof(idbuf)-1, "%ld",
						(long)ap->a_id);
					id = idbuf;
				} else {
					id = gr->gr_name;
				}
			case SMB_ACL_GROUP_OBJ:
				tag = "group";
				break;

			case SMB_ACL_OTHER:
				tag = "other";
				break;

			case SMB_ACL_MASK:
				tag = "mask";
				break;

		}

		perms[0] = (ap->a_perm & SMB_ACL_READ) ? 'r' : '-';
		perms[1] = (ap->a_perm & SMB_ACL_WRITE) ? 'w' : '-';
		perms[2] = (ap->a_perm & SMB_ACL_EXECUTE) ? 'x' : '-';
		perms[3] = '\0';

		/*          <tag>      :  <qualifier>   :  rwx \n  \0 */
		nbytes = strlen(tag) + 1 + strlen(id) + 1 + 3 + 1 + 1;

		/*
		 * If this entry would overflow the buffer
		 * allocate enough additional memory for this
		 * entry and an estimate of another 20 bytes
		 * for each entry still to be processed
		 */
		if ((len + nbytes) > maxlen) {
			char *oldtext = text;

			maxlen += nbytes + 20 * (acl_d->count - i);

			if ((text = SMB_REALLOC(oldtext, maxlen)) == NULL) {
				SAFE_FREE(oldtext);
				errno = ENOMEM;
				return NULL;
			}
		}

		slprintf(&text[len], nbytes-1, "%s:%s:%s\n", tag, id, perms);
		len += nbytes - 1;
	}

	if (len_p)
		*len_p = len;

	return text;
}

SMB_ACL_T sys_acl_init(int count)
{
	SMB_ACL_T	a;

	if (count < 0) {
		errno = EINVAL;
		return NULL;
	}

	/*
	 * note that since the definition of the structure pointed
	 * to by the SMB_ACL_T includes the first element of the
	 * acl[] array, this actually allocates an ACL with room
	 * for (count+1) entries
	 */
	if ((a = SMB_MALLOC(sizeof(struct SMB_ACL_T) + count * sizeof(struct acl))) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	a->size = count + 1;
	a->count = 0;
	a->next = -1;

	return a;
}


int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p)
{
	SMB_ACL_T	acl_d;
	SMB_ACL_ENTRY_T	entry_d;

	if (acl_p == NULL || entry_p == NULL || (acl_d = *acl_p) == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->count >= acl_d->size) {
		errno = ENOSPC;
		return -1;
	}

	entry_d		= &acl_d->acl[acl_d->count++];
	entry_d->a_type	= 0;
	entry_d->a_id	= -1;
	entry_d->a_perm	= 0;
	*entry_p	= entry_d;

	return 0;
}

int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type)
{
	switch (tag_type) {
		case SMB_ACL_USER:
		case SMB_ACL_USER_OBJ:
		case SMB_ACL_GROUP:
		case SMB_ACL_GROUP_OBJ:
		case SMB_ACL_OTHER:
		case SMB_ACL_MASK:
			entry_d->a_type = tag_type;
			break;
		default:
			errno = EINVAL;
			return -1;
	}

	return 0;
}

int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p)
{
	if (entry_d->a_type != SMB_ACL_GROUP
	    && entry_d->a_type != SMB_ACL_USER) {
		errno = EINVAL;
		return -1;
	}

	entry_d->a_id = *((id_t *)qual_p);

	return 0;
}

int sys_acl_set_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T permset_d)
{
	if (*permset_d & ~(SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) {
		return EINVAL;
	}

	entry_d->a_perm = *permset_d;

	return 0;
}

/*
 * sort the ACL and check it for validity
 *
 * if it's a minimal ACL with only 4 entries then we
 * need to recalculate the mask permissions to make
 * sure that they are the same as the GROUP_OBJ
 * permissions as required by the UnixWare acl() system call.
 *
 * (note: since POSIX allows minimal ACLs which only contain
 * 3 entries - ie there is no mask entry - we should, in theory,
 * check for this and add a mask entry if necessary - however
 * we "know" that the caller of this interface always specifies
 * a mask so, in practice "this never happens" (tm) - if it *does*
 * happen aclsort() will fail and return an error and someone will
 * have to fix it ...)
 */

static int acl_sort(SMB_ACL_T acl_d)
{
	int     fixmask = (acl_d->count <= 4);

	if (aclsort(acl_d->count, fixmask, acl_d->acl) != 0) {
		errno = EINVAL;
		return -1;
	}
	return 0;
}
 
int sys_acl_valid(SMB_ACL_T acl_d)
{
	return acl_sort(acl_d);
}

int sys_acl_set_file(const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	struct stat	s;
	struct acl	*acl_p;
	int		acl_count;
	struct acl	*acl_buf	= NULL;
	int		ret;

	if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) {
		errno = EINVAL;
		return -1;
	}

	if (acl_sort(acl_d) != 0) {
		return -1;
	}

	acl_p		= &acl_d->acl[0];
	acl_count	= acl_d->count;

	/*
	 * if it's a directory there is extra work to do
	 * since the acl() system call will replace both
	 * the access ACLs and the default ACLs (if any)
	 */
	if (stat(name, &s) != 0) {
		return -1;
	}
	if (S_ISDIR(s.st_mode)) {
		SMB_ACL_T	acc_acl;
		SMB_ACL_T	def_acl;
		SMB_ACL_T	tmp_acl;
		int		i;

		if (type == SMB_ACL_TYPE_ACCESS) {
			acc_acl = acl_d;
			def_acl = tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_DEFAULT);

		} else {
			def_acl = acl_d;
			acc_acl = tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_ACCESS);
		}

		if (tmp_acl == NULL) {
			return -1;
		}

		/*
		 * allocate a temporary buffer for the complete ACL
		 */
		acl_count = acc_acl->count + def_acl->count;
		acl_p = acl_buf = SMB_MALLOC_ARRAY(struct acl, acl_count);

		if (acl_buf == NULL) {
			sys_acl_free_acl(tmp_acl);
			errno = ENOMEM;
			return -1;
		}

		/*
		 * copy the access control and default entries into the buffer
		 */
		memcpy(&acl_buf[0], &acc_acl->acl[0],
			acc_acl->count * sizeof(acl_buf[0]));

		memcpy(&acl_buf[acc_acl->count], &def_acl->acl[0],
			def_acl->count * sizeof(acl_buf[0]));

		/*
		 * set the ACL_DEFAULT flag on the default entries
		 */
		for (i = acc_acl->count; i < acl_count; i++) {
			acl_buf[i].a_type |= ACL_DEFAULT;
		}

		sys_acl_free_acl(tmp_acl);

	} else if (type != SMB_ACL_TYPE_ACCESS) {
		errno = EINVAL;
		return -1;
	}

	ret = acl(name, SETACL, acl_count, acl_p);

	SAFE_FREE(acl_buf);

	return ret;
}

int sys_acl_set_fd(int fd, SMB_ACL_T acl_d)
{
	if (acl_sort(acl_d) != 0) {
		return -1;
	}

	return facl(fd, SETACL, acl_d->count, &acl_d->acl[0]);
}

int sys_acl_delete_def_file(const char *path)
{
	SMB_ACL_T	acl_d;
	int		ret;

	/*
	 * fetching the access ACL and rewriting it has
	 * the effect of deleting the default ACL
	 */
	if ((acl_d = sys_acl_get_file(path, SMB_ACL_TYPE_ACCESS)) == NULL) {
		return -1;
	}

	ret = acl(path, SETACL, acl_d->count, acl_d->acl);

	sys_acl_free_acl(acl_d);
	
	return ret;
}

int sys_acl_free_text(char *text)
{
	SAFE_FREE(text);
	return 0;
}

int sys_acl_free_acl(SMB_ACL_T acl_d) 
{
	SAFE_FREE(acl_d);
	return 0;
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return 0;
}

#elif defined(HAVE_HPUX_ACLS)
#include <dl.h>

/*
 * Based on the Solaris/SCO code - with modifications.
 */

/*
 * Note that while this code implements sufficient functionality
 * to support the sys_acl_* interfaces it does not provide all
 * of the semantics of the POSIX ACL interfaces.
 *
 * In particular, an ACL entry descriptor (SMB_ACL_ENTRY_T) returned
 * from a call to sys_acl_get_entry() should not be assumed to be
 * valid after calling any of the following functions, which may
 * reorder the entries in the ACL.
 *
 *	sys_acl_valid()
 *	sys_acl_set_file()
 *	sys_acl_set_fd()
 */

/* This checks if the POSIX ACL system call is defined */
/* which basically corresponds to whether JFS 3.3 or   */
/* higher is installed. If acl() was called when it    */
/* isn't defined, it causes the process to core dump   */
/* so it is important to check this and avoid acl()    */
/* calls if it isn't there.                            */

static BOOL hpux_acl_call_presence(void)
{

	shl_t handle = NULL;
	void *value;
	int ret_val=0;
	static BOOL already_checked=0;

	if(already_checked)
		return True;


	ret_val = shl_findsym(&handle, "acl", TYPE_PROCEDURE, &value);

	if(ret_val != 0) {
		DEBUG(5, ("hpux_acl_call_presence: shl_findsym() returned %d, errno = %d, error %s\n",
			ret_val, errno, strerror(errno)));
		DEBUG(5,("hpux_acl_call_presence: acl() system call is not present. Check if you have JFS 3.3 and above?\n"));
		return False;
	}

	DEBUG(10,("hpux_acl_call_presence: acl() system call is present. We have JFS 3.3 or above \n"));

	already_checked = True;
	return True;
}

int sys_acl_get_entry(SMB_ACL_T acl_d, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	if (entry_id != SMB_ACL_FIRST_ENTRY && entry_id != SMB_ACL_NEXT_ENTRY) {
		errno = EINVAL;
		return -1;
	}

	if (entry_p == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (entry_id == SMB_ACL_FIRST_ENTRY) {
		acl_d->next = 0;
	}

	if (acl_d->next < 0) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->next >= acl_d->count) {
		return 0;
	}

	*entry_p = &acl_d->acl[acl_d->next++];

	return 1;
}

int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p)
{
	*type_p = entry_d->a_type;

	return 0;
}

int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	*permset_p = &entry_d->a_perm;

	return 0;
}

void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d)
{
	if (entry_d->a_type != SMB_ACL_USER
	    && entry_d->a_type != SMB_ACL_GROUP) {
		errno = EINVAL;
		return NULL;
	}

	return &entry_d->a_id;
}

/*
 * There is no way of knowing what size the ACL returned by
 * ACL_GET will be unless you first call ACL_CNT which means
 * making an additional system call.
 *
 * In the hope of avoiding the cost of the additional system
 * call in most cases, we initially allocate enough space for
 * an ACL with INITIAL_ACL_SIZE entries. If this turns out to
 * be too small then we use ACL_CNT to find out the actual
 * size, reallocate the ACL buffer, and then call ACL_GET again.
 */

#define	INITIAL_ACL_SIZE	16

SMB_ACL_T sys_acl_get_file(const char *path_p, SMB_ACL_TYPE_T type)
{
	SMB_ACL_T	acl_d;
	int		count;		/* # of ACL entries allocated	*/
	int		naccess;	/* # of access ACL entries	*/
	int		ndefault;	/* # of default ACL entries	*/

	if(hpux_acl_call_presence() == False) {
		/* Looks like we don't have the acl() system call on HPUX. 
		 * May be the system doesn't have the latest version of JFS.
		 */
		return NULL; 
	}

	if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) {
		errno = EINVAL;
		return NULL;
	}

	count = INITIAL_ACL_SIZE;
	if ((acl_d = sys_acl_init(count)) == NULL) {
		return NULL;
	}

	/*
	 * If there isn't enough space for the ACL entries we use
	 * ACL_CNT to determine the actual number of ACL entries
	 * reallocate and try again. This is in a loop because it
	 * is possible that someone else could modify the ACL and
	 * increase the number of entries between the call to
	 * ACL_CNT and the call to ACL_GET.
	 */
	while ((count = acl(path_p, ACL_GET, count, &acl_d->acl[0])) < 0 && errno == ENOSPC) {

		sys_acl_free_acl(acl_d);

		if ((count = acl(path_p, ACL_CNT, 0, NULL)) < 0) {
			return NULL;
		}

		if ((acl_d = sys_acl_init(count)) == NULL) {
			return NULL;
		}
	}

	if (count < 0) {
		sys_acl_free_acl(acl_d);
		return NULL;
	}

	/*
	 * calculate the number of access and default ACL entries
	 *
	 * Note: we assume that the acl() system call returned a
	 * well formed ACL which is sorted so that all of the
	 * access ACL entries preceed any default ACL entries
	 */
	for (naccess = 0; naccess < count; naccess++) {
		if (acl_d->acl[naccess].a_type & ACL_DEFAULT)
			break;
	}
	ndefault = count - naccess;
	
	/*
	 * if the caller wants the default ACL we have to copy
	 * the entries down to the start of the acl[] buffer
	 * and mask out the ACL_DEFAULT flag from the type field
	 */
	if (type == SMB_ACL_TYPE_DEFAULT) {
		int	i, j;

		for (i = 0, j = naccess; i < ndefault; i++, j++) {
			acl_d->acl[i] = acl_d->acl[j];
			acl_d->acl[i].a_type &= ~ACL_DEFAULT;
		}

		acl_d->count = ndefault;
	} else {
		acl_d->count = naccess;
	}

	return acl_d;
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	/*
	 * HPUX doesn't have the facl call. Fake it using the path.... JRA.
	 */

	files_struct *fsp = file_find_fd(fd);

	if (fsp == NULL) {
		errno = EBADF;
		return NULL;
	}

	/*
	 * We know we're in the same conn context. So we
	 * can use the relative path.
	 */

	return sys_acl_get_file(fsp->fsp_name, SMB_ACL_TYPE_ACCESS);
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d)
{
	*permset_d = 0;

	return 0;
}

int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	if (perm != SMB_ACL_READ && perm != SMB_ACL_WRITE
	    && perm != SMB_ACL_EXECUTE) {
		errno = EINVAL;
		return -1;
	}

	if (permset_d == NULL) {
		errno = EINVAL;
		return -1;
	}

	*permset_d |= perm;

	return 0;
}

int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	return *permset_d & perm;
}

char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p)
{
	int	i;
	int	len, maxlen;
	char	*text;

	/*
	 * use an initial estimate of 20 bytes per ACL entry
	 * when allocating memory for the text representation
	 * of the ACL
	 */
	len	= 0;
	maxlen	= 20 * acl_d->count;
	if ((text = SMB_MALLOC(maxlen)) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	for (i = 0; i < acl_d->count; i++) {
		struct acl	*ap	= &acl_d->acl[i];
		struct passwd	*pw;
		struct group	*gr;
		char		tagbuf[12];
		char		idbuf[12];
		char		*tag;
		char		*id	= "";
		char		perms[4];
		int		nbytes;

		switch (ap->a_type) {
			/*
			 * for debugging purposes it's probably more
			 * useful to dump unknown tag types rather
			 * than just returning an error
			 */
			default:
				slprintf(tagbuf, sizeof(tagbuf)-1, "0x%x",
					ap->a_type);
				tag = tagbuf;
				slprintf(idbuf, sizeof(idbuf)-1, "%ld",
					(long)ap->a_id);
				id = idbuf;
				break;

			case SMB_ACL_USER:
				id = uidtoname(ap->a_id);
			case SMB_ACL_USER_OBJ:
				tag = "user";
				break;

			case SMB_ACL_GROUP:
				if ((gr = getgrgid(ap->a_id)) == NULL) {
					slprintf(idbuf, sizeof(idbuf)-1, "%ld",
						(long)ap->a_id);
					id = idbuf;
				} else {
					id = gr->gr_name;
				}
			case SMB_ACL_GROUP_OBJ:
				tag = "group";
				break;

			case SMB_ACL_OTHER:
				tag = "other";
				break;

			case SMB_ACL_MASK:
				tag = "mask";
				break;

		}

		perms[0] = (ap->a_perm & SMB_ACL_READ) ? 'r' : '-';
		perms[1] = (ap->a_perm & SMB_ACL_WRITE) ? 'w' : '-';
		perms[2] = (ap->a_perm & SMB_ACL_EXECUTE) ? 'x' : '-';
		perms[3] = '\0';

		/*          <tag>      :  <qualifier>   :  rwx \n  \0 */
		nbytes = strlen(tag) + 1 + strlen(id) + 1 + 3 + 1 + 1;

		/*
		 * If this entry would overflow the buffer
		 * allocate enough additional memory for this
		 * entry and an estimate of another 20 bytes
		 * for each entry still to be processed
		 */
		if ((len + nbytes) > maxlen) {
			char *oldtext = text;

			maxlen += nbytes + 20 * (acl_d->count - i);

			if ((text = SMB_REALLOC(oldtext, maxlen)) == NULL) {
				free(oldtext);
				errno = ENOMEM;
				return NULL;
			}
		}

		slprintf(&text[len], nbytes-1, "%s:%s:%s\n", tag, id, perms);
		len += nbytes - 1;
	}

	if (len_p)
		*len_p = len;

	return text;
}

SMB_ACL_T sys_acl_init(int count)
{
	SMB_ACL_T	a;

	if (count < 0) {
		errno = EINVAL;
		return NULL;
	}

	/*
	 * note that since the definition of the structure pointed
	 * to by the SMB_ACL_T includes the first element of the
	 * acl[] array, this actually allocates an ACL with room
	 * for (count+1) entries
	 */
	if ((a = SMB_MALLOC(sizeof(struct SMB_ACL_T) + count * sizeof(struct acl))) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	a->size = count + 1;
	a->count = 0;
	a->next = -1;

	return a;
}


int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p)
{
	SMB_ACL_T	acl_d;
	SMB_ACL_ENTRY_T	entry_d;

	if (acl_p == NULL || entry_p == NULL || (acl_d = *acl_p) == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->count >= acl_d->size) {
		errno = ENOSPC;
		return -1;
	}

	entry_d		= &acl_d->acl[acl_d->count++];
	entry_d->a_type	= 0;
	entry_d->a_id	= -1;
	entry_d->a_perm	= 0;
	*entry_p	= entry_d;

	return 0;
}

int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type)
{
	switch (tag_type) {
		case SMB_ACL_USER:
		case SMB_ACL_USER_OBJ:
		case SMB_ACL_GROUP:
		case SMB_ACL_GROUP_OBJ:
		case SMB_ACL_OTHER:
		case SMB_ACL_MASK:
			entry_d->a_type = tag_type;
			break;
		default:
			errno = EINVAL;
			return -1;
	}

	return 0;
}

int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p)
{
	if (entry_d->a_type != SMB_ACL_GROUP
	    && entry_d->a_type != SMB_ACL_USER) {
		errno = EINVAL;
		return -1;
	}

	entry_d->a_id = *((id_t *)qual_p);

	return 0;
}

int sys_acl_set_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T permset_d)
{
	if (*permset_d & ~(SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) {
		return EINVAL;
	}

	entry_d->a_perm = *permset_d;

	return 0;
}

/* Structure to capture the count for each type of ACE. */

struct hpux_acl_types {
	int n_user;
	int n_def_user;
	int n_user_obj;
	int n_def_user_obj;

	int n_group;
	int n_def_group;
	int n_group_obj;
	int n_def_group_obj;

	int n_other;
	int n_other_obj;
	int n_def_other_obj;

	int n_class_obj;
	int n_def_class_obj;

	int n_illegal_obj;
};

/* count_obj:
 * Counts the different number of objects in a given array of ACL
 * structures.
 * Inputs:
 *
 * acl_count      - Count of ACLs in the array of ACL strucutres.
 * aclp           - Array of ACL structures.
 * acl_type_count - Pointer to acl_types structure. Should already be
 *                  allocated.
 * Output: 
 *
 * acl_type_count - This structure is filled up with counts of various 
 *                  acl types.
 */

static int hpux_count_obj(int acl_count, struct acl *aclp, struct hpux_acl_types *acl_type_count)
{
	int i;

	memset(acl_type_count, 0, sizeof(struct hpux_acl_types));

	for(i=0;i<acl_count;i++) {
		switch(aclp[i].a_type) {
		case USER: 
			acl_type_count->n_user++;
			break;
		case USER_OBJ: 
			acl_type_count->n_user_obj++;
			break;
		case DEF_USER_OBJ: 
			acl_type_count->n_def_user_obj++;
			break;
		case GROUP: 
			acl_type_count->n_group++;
			break;
		case GROUP_OBJ: 
			acl_type_count->n_group_obj++;
			break;
		case DEF_GROUP_OBJ: 
			acl_type_count->n_def_group_obj++;
			break;
		case OTHER_OBJ: 
			acl_type_count->n_other_obj++;
			break;
		case DEF_OTHER_OBJ: 
			acl_type_count->n_def_other_obj++;
			break;
		case CLASS_OBJ:
			acl_type_count->n_class_obj++;
			break;
		case DEF_CLASS_OBJ:
			acl_type_count->n_def_class_obj++;
			break;
		case DEF_USER:
			acl_type_count->n_def_user++;
			break;
		case DEF_GROUP:
			acl_type_count->n_def_group++;
			break;
		default: 
			acl_type_count->n_illegal_obj++;
			break;
		}
	}
}

/* swap_acl_entries:  Swaps two ACL entries. 
 *
 * Inputs: aclp0, aclp1 - ACL entries to be swapped.
 */

static void hpux_swap_acl_entries(struct acl *aclp0, struct acl *aclp1)
{
	struct acl temp_acl;

	temp_acl.a_type = aclp0->a_type;
	temp_acl.a_id = aclp0->a_id;
	temp_acl.a_perm = aclp0->a_perm;

	aclp0->a_type = aclp1->a_type;
	aclp0->a_id = aclp1->a_id;
	aclp0->a_perm = aclp1->a_perm;

	aclp1->a_type = temp_acl.a_type;
	aclp1->a_id = temp_acl.a_id;
	aclp1->a_perm = temp_acl.a_perm;
}

/* prohibited_duplicate_type
 * Identifies if given ACL type can have duplicate entries or 
 * not.
 *
 * Inputs: acl_type - ACL Type.
 *
 * Outputs: 
 *
 * Return.. 
 *
 * True - If the ACL type matches any of the prohibited types.
 * False - If the ACL type doesn't match any of the prohibited types.
 */ 

static BOOL hpux_prohibited_duplicate_type(int acl_type)
{
	switch(acl_type) {
		case USER:
		case GROUP:
		case DEF_USER: 
		case DEF_GROUP:
			return True;
		default:
			return False;
	}
}

/* get_needed_class_perm
 * Returns the permissions of a ACL structure only if the ACL
 * type matches one of the pre-determined types for computing 
 * CLASS_OBJ permissions.
 *
 * Inputs: aclp - Pointer to ACL structure.
 */

static int hpux_get_needed_class_perm(struct acl *aclp)
{
	switch(aclp->a_type) {
		case USER: 
		case GROUP_OBJ: 
		case GROUP: 
		case DEF_USER_OBJ: 
		case DEF_USER:
		case DEF_GROUP_OBJ: 
		case DEF_GROUP:
		case DEF_CLASS_OBJ:
		case DEF_OTHER_OBJ: 
			return aclp->a_perm;
		default: 
			return 0;
	}
}

/* acl_sort for HPUX.
 * Sorts the array of ACL structures as per the description in
 * aclsort man page. Refer to aclsort man page for more details
 *
 * Inputs:
 *
 * acl_count - Count of ACLs in the array of ACL structures.
 * calclass  - If this is not zero, then we compute the CLASS_OBJ
 *             permissions.
 * aclp      - Array of ACL structures.
 *
 * Outputs:
 *
 * aclp     - Sorted array of ACL structures.
 *
 * Outputs:
 *
 * Returns 0 for success -1 for failure. Prints a message to the Samba
 * debug log in case of failure.
 */

static int hpux_acl_sort(int acl_count, int calclass, struct acl *aclp)
{
#if !defined(HAVE_HPUX_ACLSORT)
	/*
	 * The aclsort() system call is availabe on the latest HPUX General
	 * Patch Bundles. So for HPUX, we developed our version of acl_sort 
	 * function. Because, we don't want to update to a new 
	 * HPUX GR bundle just for aclsort() call.
	 */

	struct hpux_acl_types acl_obj_count;
	int n_class_obj_perm = 0;
	int i, j;
 
	if(!acl_count) {
		DEBUG(10,("Zero acl count passed. Returning Success\n"));
		return 0;
	}

	if(aclp == NULL) {
		DEBUG(0,("Null ACL pointer in hpux_acl_sort. Returning Failure. \n"));
		return -1;
	}

	/* Count different types of ACLs in the ACLs array */

	hpux_count_obj(acl_count, aclp, &acl_obj_count);

	/* There should be only one entry each of type USER_OBJ, GROUP_OBJ, 
	 * CLASS_OBJ and OTHER_OBJ 
	 */

	if( (acl_obj_count.n_user_obj  != 1) || 
		(acl_obj_count.n_group_obj != 1) || 
		(acl_obj_count.n_class_obj != 1) ||
		(acl_obj_count.n_other_obj != 1) 
	) {
		DEBUG(0,("hpux_acl_sort: More than one entry or no entries for \
USER OBJ or GROUP_OBJ or OTHER_OBJ or CLASS_OBJ\n"));
		return -1;
	}

	/* If any of the default objects are present, there should be only
	 * one of them each.
	 */

	if( (acl_obj_count.n_def_user_obj  > 1) || (acl_obj_count.n_def_group_obj > 1) || 
			(acl_obj_count.n_def_other_obj > 1) || (acl_obj_count.n_def_class_obj > 1) ) {
		DEBUG(0,("hpux_acl_sort: More than one entry for DEF_CLASS_OBJ \
or DEF_USER_OBJ or DEF_GROUP_OBJ or DEF_OTHER_OBJ\n"));
		return -1;
	}

	/* We now have proper number of OBJ and DEF_OBJ entries. Now sort the acl 
	 * structures.  
	 *
	 * Sorting crieteria - First sort by ACL type. If there are multiple entries of
	 * same ACL type, sort by ACL id.
	 *
	 * I am using the trival kind of sorting method here because, performance isn't 
	 * really effected by the ACLs feature. More over there aren't going to be more
	 * than 17 entries on HPUX. 
	 */

	for(i=0; i<acl_count;i++) {
		for (j=i+1; j<acl_count; j++) {
			if( aclp[i].a_type > aclp[j].a_type ) {
				/* ACL entries out of order, swap them */

				hpux_swap_acl_entries((aclp+i), (aclp+j));

			} else if ( aclp[i].a_type == aclp[j].a_type ) {

				/* ACL entries of same type, sort by id */

				if(aclp[i].a_id > aclp[j].a_id) {
					hpux_swap_acl_entries((aclp+i), (aclp+j));
				} else if (aclp[i].a_id == aclp[j].a_id) {
					/* We have a duplicate entry. */
					if(hpux_prohibited_duplicate_type(aclp[i].a_type)) {
						DEBUG(0, ("hpux_acl_sort: Duplicate entry: Type(hex): %x Id: %d\n",
							aclp[i].a_type, aclp[i].a_id));
						return -1;
					}
				}

			}
		}
	}

	/* set the class obj permissions to the computed one. */
	if(calclass) {
		int n_class_obj_index = -1;

		for(i=0;i<acl_count;i++) {
			n_class_obj_perm |= hpux_get_needed_class_perm((aclp+i));

			if(aclp[i].a_type == CLASS_OBJ)
				n_class_obj_index = i;
		}
		aclp[n_class_obj_index].a_perm = n_class_obj_perm;
	}

	return 0;
#else
	return aclsort(acl_count, calclass, aclp);
#endif
}

/*
 * sort the ACL and check it for validity
 *
 * if it's a minimal ACL with only 4 entries then we
 * need to recalculate the mask permissions to make
 * sure that they are the same as the GROUP_OBJ
 * permissions as required by the UnixWare acl() system call.
 *
 * (note: since POSIX allows minimal ACLs which only contain
 * 3 entries - ie there is no mask entry - we should, in theory,
 * check for this and add a mask entry if necessary - however
 * we "know" that the caller of this interface always specifies
 * a mask so, in practice "this never happens" (tm) - if it *does*
 * happen aclsort() will fail and return an error and someone will
 * have to fix it ...)
 */

static int acl_sort(SMB_ACL_T acl_d)
{
	int fixmask = (acl_d->count <= 4);

	if (hpux_acl_sort(acl_d->count, fixmask, acl_d->acl) != 0) {
		errno = EINVAL;
		return -1;
	}
	return 0;
}
 
int sys_acl_valid(SMB_ACL_T acl_d)
{
	return acl_sort(acl_d);
}

int sys_acl_set_file(const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	struct stat	s;
	struct acl	*acl_p;
	int		acl_count;
	struct acl	*acl_buf	= NULL;
	int		ret;

	if(hpux_acl_call_presence() == False) {
		/* Looks like we don't have the acl() system call on HPUX. 
		 * May be the system doesn't have the latest version of JFS.
		 */
		errno=ENOSYS;
		return -1; 
	}

	if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) {
		errno = EINVAL;
		return -1;
	}

	if (acl_sort(acl_d) != 0) {
		return -1;
	}

	acl_p		= &acl_d->acl[0];
	acl_count	= acl_d->count;

	/*
	 * if it's a directory there is extra work to do
	 * since the acl() system call will replace both
	 * the access ACLs and the default ACLs (if any)
	 */
	if (stat(name, &s) != 0) {
		return -1;
	}
	if (S_ISDIR(s.st_mode)) {
		SMB_ACL_T	acc_acl;
		SMB_ACL_T	def_acl;
		SMB_ACL_T	tmp_acl;
		int		i;

		if (type == SMB_ACL_TYPE_ACCESS) {
			acc_acl = acl_d;
			def_acl = tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_DEFAULT);

		} else {
			def_acl = acl_d;
			acc_acl = tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_ACCESS);
		}

		if (tmp_acl == NULL) {
			return -1;
		}

		/*
		 * allocate a temporary buffer for the complete ACL
		 */
		acl_count = acc_acl->count + def_acl->count;
		acl_p = acl_buf = SMB_MALLOC_ARRAY(struct acl, acl_count);

		if (acl_buf == NULL) {
			sys_acl_free_acl(tmp_acl);
			errno = ENOMEM;
			return -1;
		}

		/*
		 * copy the access control and default entries into the buffer
		 */
		memcpy(&acl_buf[0], &acc_acl->acl[0],
			acc_acl->count * sizeof(acl_buf[0]));

		memcpy(&acl_buf[acc_acl->count], &def_acl->acl[0],
			def_acl->count * sizeof(acl_buf[0]));

		/*
		 * set the ACL_DEFAULT flag on the default entries
		 */
		for (i = acc_acl->count; i < acl_count; i++) {
			acl_buf[i].a_type |= ACL_DEFAULT;
		}

		sys_acl_free_acl(tmp_acl);

	} else if (type != SMB_ACL_TYPE_ACCESS) {
		errno = EINVAL;
		return -1;
	}

	ret = acl(name, ACL_SET, acl_count, acl_p);

	if (acl_buf) {
		free(acl_buf);
	}

	return ret;
}

int sys_acl_set_fd(int fd, SMB_ACL_T acl_d)
{
	/*
	 * HPUX doesn't have the facl call. Fake it using the path.... JRA.
	 */

	files_struct *fsp = file_find_fd(fd);

	if (fsp == NULL) {
		errno = EBADF;
		return NULL;
	}

	if (acl_sort(acl_d) != 0) {
		return -1;
	}

	/*
	 * We know we're in the same conn context. So we
	 * can use the relative path.
	 */

	return sys_acl_set_file(fsp->fsp_name, SMB_ACL_TYPE_ACCESS, acl_d);
}

int sys_acl_delete_def_file(const char *path)
{
	SMB_ACL_T	acl_d;
	int		ret;

	/*
	 * fetching the access ACL and rewriting it has
	 * the effect of deleting the default ACL
	 */
	if ((acl_d = sys_acl_get_file(path, SMB_ACL_TYPE_ACCESS)) == NULL) {
		return -1;
	}

	ret = acl(path, ACL_SET, acl_d->count, acl_d->acl);

	sys_acl_free_acl(acl_d);
	
	return ret;
}

int sys_acl_free_text(char *text)
{
	free(text);
	return 0;
}

int sys_acl_free_acl(SMB_ACL_T acl_d) 
{
	free(acl_d);
	return 0;
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return 0;
}

#elif defined(HAVE_IRIX_ACLS)

int sys_acl_get_entry(SMB_ACL_T acl_d, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	if (entry_id != SMB_ACL_FIRST_ENTRY && entry_id != SMB_ACL_NEXT_ENTRY) {
		errno = EINVAL;
		return -1;
	}

	if (entry_p == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (entry_id == SMB_ACL_FIRST_ENTRY) {
		acl_d->next = 0;
	}

	if (acl_d->next < 0) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->next >= acl_d->aclp->acl_cnt) {
		return 0;
	}

	*entry_p = &acl_d->aclp->acl_entry[acl_d->next++];

	return 1;
}

int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p)
{
	*type_p = entry_d->ae_tag;

	return 0;
}

int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	*permset_p = entry_d;

	return 0;
}

void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d)
{
	if (entry_d->ae_tag != SMB_ACL_USER
	    && entry_d->ae_tag != SMB_ACL_GROUP) {
		errno = EINVAL;
		return NULL;
	}

	return &entry_d->ae_id;
}

SMB_ACL_T sys_acl_get_file(const char *path_p, SMB_ACL_TYPE_T type)
{
	SMB_ACL_T	a;

	if ((a = SMB_MALLOC_P(struct SMB_ACL_T)) == NULL) {
		errno = ENOMEM;
		return NULL;
	}
	if ((a->aclp = acl_get_file(path_p, type)) == NULL) {
		SAFE_FREE(a);
		return NULL;
	}
	a->next = -1;
	a->freeaclp = True;
	return a;
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	SMB_ACL_T	a;

	if ((a = SMB_MALLOC_P(struct SMB_ACL_T)) == NULL) {
		errno = ENOMEM;
		return NULL;
	}
	if ((a->aclp = acl_get_fd(fd)) == NULL) {
		SAFE_FREE(a);
		return NULL;
	}
	a->next = -1;
	a->freeaclp = True;
	return a;
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d)
{
	permset_d->ae_perm = 0;

	return 0;
}

int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	if (perm != SMB_ACL_READ && perm != SMB_ACL_WRITE
	    && perm != SMB_ACL_EXECUTE) {
		errno = EINVAL;
		return -1;
	}

	if (permset_d == NULL) {
		errno = EINVAL;
		return -1;
	}

	permset_d->ae_perm |= perm;

	return 0;
}

int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
	return permset_d->ae_perm & perm;
}

char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p)
{
	return acl_to_text(acl_d->aclp, len_p);
}

SMB_ACL_T sys_acl_init(int count)
{
	SMB_ACL_T	a;

	if (count < 0) {
		errno = EINVAL;
		return NULL;
	}

	if ((a = SMB_MALLOC(sizeof(struct SMB_ACL_T) + sizeof(struct acl))) == NULL) {
		errno = ENOMEM;
		return NULL;
	}

	a->next = -1;
	a->freeaclp = False;
	a->aclp = (struct acl *)(&a->aclp + sizeof(struct acl *));
	a->aclp->acl_cnt = 0;

	return a;
}


int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p)
{
	SMB_ACL_T	acl_d;
	SMB_ACL_ENTRY_T	entry_d;

	if (acl_p == NULL || entry_p == NULL || (acl_d = *acl_p) == NULL) {
		errno = EINVAL;
		return -1;
	}

	if (acl_d->aclp->acl_cnt >= ACL_MAX_ENTRIES) {
		errno = ENOSPC;
		return -1;
	}

	entry_d		= &acl_d->aclp->acl_entry[acl_d->aclp->acl_cnt++];
	entry_d->ae_tag	= 0;
	entry_d->ae_id	= 0;
	entry_d->ae_perm	= 0;
	*entry_p	= entry_d;

	return 0;
}

int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type)
{
	switch (tag_type) {
		case SMB_ACL_USER:
		case SMB_ACL_USER_OBJ:
		case SMB_ACL_GROUP:
		case SMB_ACL_GROUP_OBJ:
		case SMB_ACL_OTHER:
		case SMB_ACL_MASK:
			entry_d->ae_tag = tag_type;
			break;
		default:
			errno = EINVAL;
			return -1;
	}

	return 0;
}

int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p)
{
	if (entry_d->ae_tag != SMB_ACL_GROUP
	    && entry_d->ae_tag != SMB_ACL_USER) {
		errno = EINVAL;
		return -1;
	}

	entry_d->ae_id = *((id_t *)qual_p);

	return 0;
}

int sys_acl_set_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T permset_d)
{
	if (permset_d->ae_perm & ~(SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) {
		return EINVAL;
	}

	entry_d->ae_perm = permset_d->ae_perm;

	return 0;
}

int sys_acl_valid(SMB_ACL_T acl_d)
{
	return acl_valid(acl_d->aclp);
}

int sys_acl_set_file(const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
	return acl_set_file(name, type, acl_d->aclp);
}

int sys_acl_set_fd(int fd, SMB_ACL_T acl_d)
{
	return acl_set_fd(fd, acl_d->aclp);
}

int sys_acl_delete_def_file(const char *name)
{
	return acl_delete_def_file(name);
}

int sys_acl_free_text(char *text)
{
	return acl_free(text);
}

int sys_acl_free_acl(SMB_ACL_T acl_d) 
{
	if (acl_d->freeaclp) {
		acl_free(acl_d->aclp);
	}
	acl_free(acl_d);
	return 0;
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return 0;
}

#elif defined(HAVE_AIX_ACLS)

/* Donated by Medha Date, mdate@austin.ibm.com, for IBM */

int sys_acl_get_entry( SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	struct acl_entry_link *link;
	struct new_acl_entry *entry;
	int keep_going;

	DEBUG(10,("This is the count: %d\n",theacl->count));

	/* Check if count was previously set to -1. *
	 * If it was, that means we reached the end *
	 * of the acl last time.                    */
	if(theacl->count == -1)
		return(0);

	link = theacl;
	/* To get to the next acl, traverse linked list until index *
	 * of acl matches the count we are keeping.  This count is  *
	 * incremented each time we return an acl entry.            */

	for(keep_going = 0; keep_going < theacl->count; keep_going++)
		link = link->nextp;

	entry = *entry_p =  link->entryp;

	DEBUG(10,("*entry_p is %d\n",entry_p));
	DEBUG(10,("*entry_p->ace_access is %d\n",entry->ace_access));

	/* Increment count */
	theacl->count++;
	if(link->nextp == NULL)
		theacl->count = -1;

	return(1);
}

int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
	/* Initialize tag type */

	*tag_type_p = -1;
	DEBUG(10,("the tagtype is %d\n",entry_d->ace_id->id_type));

	/* Depending on what type of entry we have, *
	 * return tag type.                         */
	switch(entry_d->ace_id->id_type) {
	case ACEID_USER:
		*tag_type_p = SMB_ACL_USER;
		break;
	case ACEID_GROUP:
		*tag_type_p = SMB_ACL_GROUP;
		break;

	case SMB_ACL_USER_OBJ:
	case SMB_ACL_GROUP_OBJ:
	case SMB_ACL_OTHER:
		*tag_type_p = entry_d->ace_id->id_type;
		break;
 
	default:
		return(-1);
	}

	return(0);
}

int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	DEBUG(10,("Starting AIX sys_acl_get_permset\n"));
	*permset_p = &entry_d->ace_access;
	DEBUG(10,("**permset_p is %d\n",**permset_p));
	if(!(**permset_p & S_IXUSR) &&
		!(**permset_p & S_IWUSR) &&
		!(**permset_p & S_IRUSR) &&
		(**permset_p != 0))
			return(-1);

	DEBUG(10,("Ending AIX sys_acl_get_permset\n"));
	return(0);
}

void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
{
	return(entry_d->ace_id->id_data);
}

SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
{
	struct acl *file_acl = (struct acl *)NULL;
	struct acl_entry *acl_entry;
	struct new_acl_entry *new_acl_entry;
	struct ace_id *idp;
	struct acl_entry_link *acl_entry_link;
	struct acl_entry_link *acl_entry_link_head;
	int i;
	int rc = 0;
	uid_t user_id;

	/* Get the acl using statacl */
 
	DEBUG(10,("Entering sys_acl_get_file\n"));
	DEBUG(10,("path_p is %s\n",path_p));

	file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
 
	if(file_acl == NULL) {
		errno=ENOMEM;
		DEBUG(0,("Error in AIX sys_acl_get_file: %d\n",errno));
		return(NULL);
	}

	memset(file_acl,0,BUFSIZ);

	rc = statacl((char *)path_p,0,file_acl,BUFSIZ);
	if(rc == -1) {
		DEBUG(0,("statacl returned %d with errno %d\n",rc,errno));
		SAFE_FREE(file_acl);
		return(NULL);
	}

	DEBUG(10,("Got facl and returned it\n"));

	/* Point to the first acl entry in the acl */
	acl_entry =  file_acl->acl_ext;

	/* Begin setting up the head of the linked list *
	 * that will be used for the storing the acl    *
	 * in a way that is useful for the posix_acls.c *
	 * code.                                          */

	acl_entry_link_head = acl_entry_link = sys_acl_init(0);
	if(acl_entry_link_head == NULL)
		return(NULL);

	acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);
	if(acl_entry_link->entryp == NULL) {
		SAFE_FREE(file_acl);
		errno = ENOMEM;
		DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
		return(NULL);
	}

	DEBUG(10,("acl_entry is %d\n",acl_entry));
	DEBUG(10,("acl_last(file_acl) id %d\n",acl_last(file_acl)));

	/* Check if the extended acl bit is on.   *
	 * If it isn't, do not show the           *
	 * contents of the acl since AIX intends *
	 * the extended info to remain unused     */

	if(file_acl->acl_mode & S_IXACL){
		/* while we are not pointing to the very end */
		while(acl_entry < acl_last(file_acl)) {
			/* before we malloc anything, make sure this is  */
			/* a valid acl entry and one that we want to map */
			idp = id_nxt(acl_entry->ace_id);
			if((acl_entry->ace_type == ACC_SPECIFY ||
				(acl_entry->ace_type == ACC_PERMIT)) && (idp != id_last(acl_entry))) {
					acl_entry = acl_nxt(acl_entry);
					continue;
			}

			idp = acl_entry->ace_id;

			/* Check if this is the first entry in the linked list. *
			 * The first entry needs to keep prevp pointing to NULL *
			 * and already has entryp allocated.                  */

			if(acl_entry_link_head->count != 0) {
				acl_entry_link->nextp = SMB_MALLOC_P(struct acl_entry_link);

				if(acl_entry_link->nextp == NULL) {
					SAFE_FREE(file_acl);
					errno = ENOMEM;
					DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
					return(NULL);
				}

				acl_entry_link->nextp->prevp = acl_entry_link;
				acl_entry_link = acl_entry_link->nextp;
				acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);
				if(acl_entry_link->entryp == NULL) {
					SAFE_FREE(file_acl);
					errno = ENOMEM;
					DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
					return(NULL);
				}
				acl_entry_link->nextp = NULL;
			}

			acl_entry_link->entryp->ace_len = acl_entry->ace_len;

			/* Don't really need this since all types are going *
			 * to be specified but, it's better than leaving it 0 */

			acl_entry_link->entryp->ace_type = acl_entry->ace_type;
 
			acl_entry_link->entryp->ace_access = acl_entry->ace_access;
 
			memcpy(acl_entry_link->entryp->ace_id,idp,sizeof(struct ace_id));

			/* The access in the acl entries must be left shifted by *
			 * three bites, because they will ultimately be compared *
			 * to S_IRUSR, S_IWUSR, and S_IXUSR.                  */

			switch(acl_entry->ace_type){
			case ACC_PERMIT:
			case ACC_SPECIFY:
				acl_entry_link->entryp->ace_access = acl_entry->ace_access;
				acl_entry_link->entryp->ace_access <<= 6;
				acl_entry_link_head->count++;
				break;
			case ACC_DENY:
				/* Since there is no way to return a DENY acl entry *
				 * change to PERMIT and then shift.                 */
				DEBUG(10,("acl_entry->ace_access is %d\n",acl_entry->ace_access));
				acl_entry_link->entryp->ace_access = ~acl_entry->ace_access & 7;
				DEBUG(10,("acl_entry_link->entryp->ace_access is %d\n",acl_entry_link->entryp->ace_access));
				acl_entry_link->entryp->ace_access <<= 6;
				acl_entry_link_head->count++;
				break;
			default:
				return(0);
			}

			DEBUG(10,("acl_entry = %d\n",acl_entry));
			DEBUG(10,("The ace_type is %d\n",acl_entry->ace_type));
 
			acl_entry = acl_nxt(acl_entry);
		}
	} /* end of if enabled */

	/* Since owner, group, other acl entries are not *
	 * part of the acl entries in an acl, they must  *
	 * be dummied up to become part of the list.     */

	for( i = 1; i < 4; i++) {
		DEBUG(10,("i is %d\n",i));
		if(acl_entry_link_head->count != 0) {
			acl_entry_link->nextp = SMB_MALLOC_P(struct acl_entry_link);
			if(acl_entry_link->nextp == NULL) {
				SAFE_FREE(file_acl);
				errno = ENOMEM;
				DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
				return(NULL);
			}

			acl_entry_link->nextp->prevp = acl_entry_link;
			acl_entry_link = acl_entry_link->nextp;
			acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);
			if(acl_entry_link->entryp == NULL) {
				SAFE_FREE(file_acl);
				errno = ENOMEM;
				DEBUG(0,("Error in AIX sys_acl_get_file is %d\n",errno));
				return(NULL);
			}
		}

		acl_entry_link->nextp = NULL;

		new_acl_entry = acl_entry_link->entryp;
		idp = new_acl_entry->ace_id;

		new_acl_entry->ace_len = sizeof(struct acl_entry);
		new_acl_entry->ace_type = ACC_PERMIT;
		idp->id_len = sizeof(struct ace_id);
		DEBUG(10,("idp->id_len = %d\n",idp->id_len));
		memset(idp->id_data,0,sizeof(uid_t));

		switch(i) {
		case 2:
			new_acl_entry->ace_access = file_acl->g_access << 6;
			idp->id_type = SMB_ACL_GROUP_OBJ;
			break;

		case 3:
			new_acl_entry->ace_access = file_acl->o_access << 6;
			idp->id_type = SMB_ACL_OTHER;
			break;
 
		case 1:
			new_acl_entry->ace_access = file_acl->u_access << 6;
			idp->id_type = SMB_ACL_USER_OBJ;
			break;
 
		default:
			return(NULL);

		}

		acl_entry_link_head->count++;
		DEBUG(10,("new_acl_entry->ace_access = %d\n",new_acl_entry->ace_access));
	}

	acl_entry_link_head->count = 0;
	SAFE_FREE(file_acl);

	return(acl_entry_link_head);
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	struct acl *file_acl = (struct acl *)NULL;
	struct acl_entry *acl_entry;
	struct new_acl_entry *new_acl_entry;
	struct ace_id *idp;
	struct acl_entry_link *acl_entry_link;
	struct acl_entry_link *acl_entry_link_head;
	int i;
	int rc = 0;
	uid_t user_id;

	/* Get the acl using fstatacl */
   
	DEBUG(10,("Entering sys_acl_get_fd\n"));
	DEBUG(10,("fd is %d\n",fd));
	file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);

	if(file_acl == NULL) {
		errno=ENOMEM;
		DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
		return(NULL);
	}

	memset(file_acl,0,BUFSIZ);

	rc = fstatacl(fd,0,file_acl,BUFSIZ);
	if(rc == -1) {
		DEBUG(0,("The fstatacl call returned %d with errno %d\n",rc,errno));
		SAFE_FREE(file_acl);
		return(NULL);
	}

	DEBUG(10,("Got facl and returned it\n"));

	/* Point to the first acl entry in the acl */

	acl_entry =  file_acl->acl_ext;
	/* Begin setting up the head of the linked list *
	 * that will be used for the storing the acl    *
	 * in a way that is useful for the posix_acls.c *
	 * code.                                        */

	acl_entry_link_head = acl_entry_link = sys_acl_init(0);
	if(acl_entry_link_head == NULL){
		SAFE_FREE(file_acl);
		return(NULL);
	}

	acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);

	if(acl_entry_link->entryp == NULL) {
		errno = ENOMEM;
		DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
		SAFE_FREE(file_acl);
		return(NULL);
	}

	DEBUG(10,("acl_entry is %d\n",acl_entry));
	DEBUG(10,("acl_last(file_acl) id %d\n",acl_last(file_acl)));
 
	/* Check if the extended acl bit is on.   *
	 * If it isn't, do not show the           *
	 * contents of the acl since AIX intends  *
	 * the extended info to remain unused     */
 
	if(file_acl->acl_mode & S_IXACL){
		/* while we are not pointing to the very end */
		while(acl_entry < acl_last(file_acl)) {
			/* before we malloc anything, make sure this is  */
			/* a valid acl entry and one that we want to map */

			idp = id_nxt(acl_entry->ace_id);
			if((acl_entry->ace_type == ACC_SPECIFY ||
				(acl_entry->ace_type == ACC_PERMIT)) && (idp != id_last(acl_entry))) {
					acl_entry = acl_nxt(acl_entry);
					continue;
			}

			idp = acl_entry->ace_id;
 
			/* Check if this is the first entry in the linked list. *
			 * The first entry needs to keep prevp pointing to NULL *
			 * and already has entryp allocated.                 */

			if(acl_entry_link_head->count != 0) {
				acl_entry_link->nextp = SMB_MALLOC_P(struct acl_entry_link);
				if(acl_entry_link->nextp == NULL) {
					errno = ENOMEM;
					DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
					SAFE_FREE(file_acl);
					return(NULL);
				}
				acl_entry_link->nextp->prevp = acl_entry_link;
				acl_entry_link = acl_entry_link->nextp;
				acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);
				if(acl_entry_link->entryp == NULL) {
					errno = ENOMEM;
					DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
					SAFE_FREE(file_acl);
					return(NULL);
				}

				acl_entry_link->nextp = NULL;
			}

			acl_entry_link->entryp->ace_len = acl_entry->ace_len;

			/* Don't really need this since all types are going *
			 * to be specified but, it's better than leaving it 0 */

			acl_entry_link->entryp->ace_type = acl_entry->ace_type;
			acl_entry_link->entryp->ace_access = acl_entry->ace_access;

			memcpy(acl_entry_link->entryp->ace_id, idp, sizeof(struct ace_id));

			/* The access in the acl entries must be left shifted by *
			 * three bites, because they will ultimately be compared *
			 * to S_IRUSR, S_IWUSR, and S_IXUSR.                  */

			switch(acl_entry->ace_type){
			case ACC_PERMIT:
			case ACC_SPECIFY:
				acl_entry_link->entryp->ace_access = acl_entry->ace_access;
				acl_entry_link->entryp->ace_access <<= 6;
				acl_entry_link_head->count++;
				break;
			case ACC_DENY:
				/* Since there is no way to return a DENY acl entry *
				 * change to PERMIT and then shift.                 */
				DEBUG(10,("acl_entry->ace_access is %d\n",acl_entry->ace_access));
				acl_entry_link->entryp->ace_access = ~acl_entry->ace_access & 7;
				DEBUG(10,("acl_entry_link->entryp->ace_access is %d\n",acl_entry_link->entryp->ace_access));
				acl_entry_link->entryp->ace_access <<= 6;
				acl_entry_link_head->count++;
				break;
			default:
				return(0);
			}

			DEBUG(10,("acl_entry = %d\n",acl_entry));
			DEBUG(10,("The ace_type is %d\n",acl_entry->ace_type));
 
			acl_entry = acl_nxt(acl_entry);
		}
	} /* end of if enabled */

	/* Since owner, group, other acl entries are not *
	 * part of the acl entries in an acl, they must  *
	 * be dummied up to become part of the list.     */

	for( i = 1; i < 4; i++) {
		DEBUG(10,("i is %d\n",i));
		if(acl_entry_link_head->count != 0){
			acl_entry_link->nextp = SMB_MALLOC_P(struct acl_entry_link);
			if(acl_entry_link->nextp == NULL) {
				errno = ENOMEM;
				DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
				SAFE_FREE(file_acl);
				return(NULL);
			}

			acl_entry_link->nextp->prevp = acl_entry_link;
			acl_entry_link = acl_entry_link->nextp;
			acl_entry_link->entryp = SMB_MALLOC_P(struct new_acl_entry);

			if(acl_entry_link->entryp == NULL) {
				SAFE_FREE(file_acl);
				errno = ENOMEM;
				DEBUG(0,("Error in sys_acl_get_fd is %d\n",errno));
				return(NULL);
			}
		}

		acl_entry_link->nextp = NULL;
 
		new_acl_entry = acl_entry_link->entryp;
		idp = new_acl_entry->ace_id;
 
		new_acl_entry->ace_len = sizeof(struct acl_entry);
		new_acl_entry->ace_type = ACC_PERMIT;
		idp->id_len = sizeof(struct ace_id);
		DEBUG(10,("idp->id_len = %d\n",idp->id_len));
		memset(idp->id_data,0,sizeof(uid_t));
 
		switch(i) {
		case 2:
			new_acl_entry->ace_access = file_acl->g_access << 6;
			idp->id_type = SMB_ACL_GROUP_OBJ;
			break;
 
		case 3:
			new_acl_entry->ace_access = file_acl->o_access << 6;
			idp->id_type = SMB_ACL_OTHER;
			break;
 
		case 1:
			new_acl_entry->ace_access = file_acl->u_access << 6;
			idp->id_type = SMB_ACL_USER_OBJ;
			break;
 
		default:
			return(NULL);
		}
 
		acl_entry_link_head->count++;
		DEBUG(10,("new_acl_entry->ace_access = %d\n",new_acl_entry->ace_access));
	}

	acl_entry_link_head->count = 0;
	SAFE_FREE(file_acl);
 
	return(acl_entry_link_head);
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
{
	*permset = *permset & ~0777;
	return(0);
}

int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	if((perm != 0) &&
			(perm & (S_IXUSR | S_IWUSR | S_IRUSR)) == 0)
		return(-1);

	*permset |= perm;
	DEBUG(10,("This is the permset now: %d\n",*permset));
	return(0);
}

char *sys_acl_to_text( SMB_ACL_T theacl, ssize_t *plen)
{
	return(NULL);
}

SMB_ACL_T sys_acl_init( int count)
{
	struct acl_entry_link *theacl = NULL;
 
	DEBUG(10,("Entering sys_acl_init\n"));

	theacl = SMB_MALLOC_P(struct acl_entry_link);
	if(theacl == NULL) {
		errno = ENOMEM;
		DEBUG(0,("Error in sys_acl_init is %d\n",errno));
		return(NULL);
	}

	theacl->count = 0;
	theacl->nextp = NULL;
	theacl->prevp = NULL;
	theacl->entryp = NULL;
	DEBUG(10,("Exiting sys_acl_init\n"));
	return(theacl);
}

int sys_acl_create_entry( SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
	struct acl_entry_link *theacl;
	struct acl_entry_link *acl_entryp;
	struct acl_entry_link *temp_entry;
	int counting;

	DEBUG(10,("Entering the sys_acl_create_entry\n"));

	theacl = acl_entryp = *pacl;

	/* Get to the end of the acl before adding entry */

	for(counting=0; counting < theacl->count; counting++){
		DEBUG(10,("The acl_entryp is %d\n",acl_entryp));
		temp_entry = acl_entryp;
		acl_entryp = acl_entryp->nextp;
	}

	if(theacl->count != 0){
		temp_entry->nextp = acl_entryp = SMB_MALLOC_P(struct acl_entry_link);
		if(acl_entryp == NULL) {
			errno = ENOMEM;
			DEBUG(0,("Error in sys_acl_create_entry is %d\n",errno));
			return(-1);
		}

		DEBUG(10,("The acl_entryp is %d\n",acl_entryp));
		acl_entryp->prevp = temp_entry;
		DEBUG(10,("The acl_entryp->prevp is %d\n",acl_entryp->prevp));
	}

	*pentry = acl_entryp->entryp = SMB_MALLOC_P(struct new_acl_entry);
	if(*pentry == NULL) {
		errno = ENOMEM;
		DEBUG(0,("Error in sys_acl_create_entry is %d\n",errno));
		return(-1);
	}

	memset(*pentry,0,sizeof(struct new_acl_entry));
	acl_entryp->entryp->ace_len = sizeof(struct acl_entry);
	acl_entryp->entryp->ace_type = ACC_PERMIT;
	acl_entryp->entryp->ace_id->id_len = sizeof(struct ace_id);
	acl_entryp->nextp = NULL;
	theacl->count++;
	DEBUG(10,("Exiting sys_acl_create_entry\n"));
	return(0);
}

int sys_acl_set_tag_type( SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
	DEBUG(10,("Starting AIX sys_acl_set_tag_type\n"));
	entry->ace_id->id_type = tagtype;
	DEBUG(10,("The tag type is %d\n",entry->ace_id->id_type));
	DEBUG(10,("Ending AIX sys_acl_set_tag_type\n"));
}

int sys_acl_set_qualifier( SMB_ACL_ENTRY_T entry, void *qual)
{
	DEBUG(10,("Starting AIX sys_acl_set_qualifier\n"));
	memcpy(entry->ace_id->id_data,qual,sizeof(uid_t));
	DEBUG(10,("Ending AIX sys_acl_set_qualifier\n"));
	return(0);
}

int sys_acl_set_permset( SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
	DEBUG(10,("Starting AIX sys_acl_set_permset\n"));
	if(!(*permset & S_IXUSR) &&
		!(*permset & S_IWUSR) &&
		!(*permset & S_IRUSR) &&
		(*permset != 0))
			return(-1);

	entry->ace_access = *permset;
	DEBUG(10,("entry->ace_access = %d\n",entry->ace_access));
	DEBUG(10,("Ending AIX sys_acl_set_permset\n"));
	return(0);
}

int sys_acl_valid( SMB_ACL_T theacl )
{
	int user_obj = 0;
	int group_obj = 0;
	int other_obj = 0;
	struct acl_entry_link *acl_entry;

	for(acl_entry=theacl; acl_entry != NULL; acl_entry = acl_entry->nextp) {
		user_obj += (acl_entry->entryp->ace_id->id_type == SMB_ACL_USER_OBJ);
		group_obj += (acl_entry->entryp->ace_id->id_type == SMB_ACL_GROUP_OBJ);
		other_obj += (acl_entry->entryp->ace_id->id_type == SMB_ACL_OTHER);
	}

	DEBUG(10,("user_obj=%d, group_obj=%d, other_obj=%d\n",user_obj,group_obj,other_obj));
 
	if(user_obj != 1 || group_obj != 1 || other_obj != 1)
		return(-1); 

	return(0);
}

int sys_acl_set_file( const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
	struct acl_entry_link *acl_entry_link = NULL;
	struct acl *file_acl = NULL;
	struct acl *file_acl_temp = NULL;
	struct acl_entry *acl_entry = NULL;
	struct ace_id *ace_id = NULL;
	uint id_type;
	uint ace_access;
	uint user_id;
	uint acl_length;
	uint rc;

	DEBUG(10,("Entering sys_acl_set_file\n"));
	DEBUG(10,("File name is %s\n",name));
 
	/* AIX has no default ACL */
	if(acltype == SMB_ACL_TYPE_DEFAULT)
		return(0);

	acl_length = BUFSIZ;
	file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);

	if(file_acl == NULL) {
		errno = ENOMEM;
		DEBUG(0,("Error in sys_acl_set_file is %d\n",errno));
		return(-1);
	}

	memset(file_acl,0,BUFSIZ);

	file_acl->acl_len = ACL_SIZ;
	file_acl->acl_mode = S_IXACL;

	for(acl_entry_link=theacl; acl_entry_link != NULL; acl_entry_link = acl_entry_link->nextp) {
		acl_entry_link->entryp->ace_access >>= 6;
		id_type = acl_entry_link->entryp->ace_id->id_type;

		switch(id_type) {
		case SMB_ACL_USER_OBJ:
			file_acl->u_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_GROUP_OBJ:
			file_acl->g_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_OTHER:
			file_acl->o_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_MASK:
			continue;
		}

		if((file_acl->acl_len + sizeof(struct acl_entry)) > acl_length) {
			acl_length += sizeof(struct acl_entry);
			file_acl_temp = (struct acl *)SMB_MALLOC(acl_length);
			if(file_acl_temp == NULL) {
				SAFE_FREE(file_acl);
				errno = ENOMEM;
				DEBUG(0,("Error in sys_acl_set_file is %d\n",errno));
				return(-1);
			}  

			memcpy(file_acl_temp,file_acl,file_acl->acl_len);
			SAFE_FREE(file_acl);
			file_acl = file_acl_temp;
		}

		acl_entry = (struct acl_entry *)((char *)file_acl + file_acl->acl_len);
		file_acl->acl_len += sizeof(struct acl_entry);
		acl_entry->ace_len = acl_entry_link->entryp->ace_len;
		acl_entry->ace_access = acl_entry_link->entryp->ace_access;
 
		/* In order to use this, we'll need to wait until we can get denies */
		/* if(!acl_entry->ace_access && acl_entry->ace_type == ACC_PERMIT)
		acl_entry->ace_type = ACC_SPECIFY; */

		acl_entry->ace_type = ACC_SPECIFY;
 
		ace_id = acl_entry->ace_id;
 
		ace_id->id_type = acl_entry_link->entryp->ace_id->id_type;
		DEBUG(10,("The id type is %d\n",ace_id->id_type));
		ace_id->id_len = acl_entry_link->entryp->ace_id->id_len;
		memcpy(&user_id, acl_entry_link->entryp->ace_id->id_data, sizeof(uid_t));
		memcpy(acl_entry->ace_id->id_data, &user_id, sizeof(uid_t));
	}

	rc = chacl(name,file_acl,file_acl->acl_len);
	DEBUG(10,("errno is %d\n",errno));
	DEBUG(10,("return code is %d\n",rc));
	SAFE_FREE(file_acl);
	DEBUG(10,("Exiting the sys_acl_set_file\n"));
	return(rc);
}

int sys_acl_set_fd( int fd, SMB_ACL_T theacl)
{
	struct acl_entry_link *acl_entry_link = NULL;
	struct acl *file_acl = NULL;
	struct acl *file_acl_temp = NULL;
	struct acl_entry *acl_entry = NULL;
	struct ace_id *ace_id = NULL;
	uint id_type;
	uint user_id;
	uint acl_length;
	uint rc;
 
	DEBUG(10,("Entering sys_acl_set_fd\n"));
	acl_length = BUFSIZ;
	file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);

	if(file_acl == NULL) {
		errno = ENOMEM;
		DEBUG(0,("Error in sys_acl_set_fd is %d\n",errno));
		return(-1);
	}

	memset(file_acl,0,BUFSIZ);
 
	file_acl->acl_len = ACL_SIZ;
	file_acl->acl_mode = S_IXACL;

	for(acl_entry_link=theacl; acl_entry_link != NULL; acl_entry_link = acl_entry_link->nextp) {
		acl_entry_link->entryp->ace_access >>= 6;
		id_type = acl_entry_link->entryp->ace_id->id_type;
		DEBUG(10,("The id_type is %d\n",id_type));

		switch(id_type) {
		case SMB_ACL_USER_OBJ:
			file_acl->u_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_GROUP_OBJ:
			file_acl->g_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_OTHER:
			file_acl->o_access = acl_entry_link->entryp->ace_access;
			continue;
		case SMB_ACL_MASK:
			continue;
		}

		if((file_acl->acl_len + sizeof(struct acl_entry)) > acl_length) {
			acl_length += sizeof(struct acl_entry);
			file_acl_temp = (struct acl *)SMB_MALLOC(acl_length);
			if(file_acl_temp == NULL) {
				SAFE_FREE(file_acl);
				errno = ENOMEM;
				DEBUG(0,("Error in sys_acl_set_fd is %d\n",errno));
				return(-1);
			}

			memcpy(file_acl_temp,file_acl,file_acl->acl_len);
			SAFE_FREE(file_acl);
			file_acl = file_acl_temp;
		}

		acl_entry = (struct acl_entry *)((char *)file_acl + file_acl->acl_len);
		file_acl->acl_len += sizeof(struct acl_entry);
		acl_entry->ace_len = acl_entry_link->entryp->ace_len;
		acl_entry->ace_access = acl_entry_link->entryp->ace_access;
 
		/* In order to use this, we'll need to wait until we can get denies */
		/* if(!acl_entry->ace_access && acl_entry->ace_type == ACC_PERMIT)
			acl_entry->ace_type = ACC_SPECIFY; */
 
		acl_entry->ace_type = ACC_SPECIFY;
 
		ace_id = acl_entry->ace_id;
 
		ace_id->id_type = acl_entry_link->entryp->ace_id->id_type;
		DEBUG(10,("The id type is %d\n",ace_id->id_type));
		ace_id->id_len = acl_entry_link->entryp->ace_id->id_len;
		memcpy(&user_id, acl_entry_link->entryp->ace_id->id_data, sizeof(uid_t));
		memcpy(ace_id->id_data, &user_id, sizeof(uid_t));
	}
 
	rc = fchacl(fd,file_acl,file_acl->acl_len);
	DEBUG(10,("errno is %d\n",errno));
	DEBUG(10,("return code is %d\n",rc));
	SAFE_FREE(file_acl);
	DEBUG(10,("Exiting sys_acl_set_fd\n"));
	return(rc);
}

int sys_acl_delete_def_file(const char *name)
{
	/* AIX has no default ACL */
	return 0;
}

int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	return(*permset & perm);
}

int sys_acl_free_text(char *text)
{
	return(0);
}

int sys_acl_free_acl(SMB_ACL_T posix_acl)
{
	struct acl_entry_link *acl_entry_link;

	for(acl_entry_link = posix_acl->nextp; acl_entry_link->nextp != NULL; acl_entry_link = acl_entry_link->nextp) {
		SAFE_FREE(acl_entry_link->prevp->entryp);
		SAFE_FREE(acl_entry_link->prevp);
	}

	SAFE_FREE(acl_entry_link->prevp->entryp);
	SAFE_FREE(acl_entry_link->prevp);
	SAFE_FREE(acl_entry_link->entryp);
	SAFE_FREE(acl_entry_link);
 
	return(0);
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	return(0);
}

#else /* No ACLs. */

int sys_acl_get_entry( SMB_ACL_T the_acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
	errno = ENOSYS;
	return -1;
}

void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
{
	errno = ENOSYS;
	return NULL;
}

SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
{
	errno = ENOSYS;
	return (SMB_ACL_T)NULL;
}

SMB_ACL_T sys_acl_get_fd(int fd)
{
	errno = ENOSYS;
	return (SMB_ACL_T)NULL;
}

int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
{
	errno = ENOSYS;
	return (permset & perm) ? 1 : 0;
}

char *sys_acl_to_text( SMB_ACL_T the_acl, ssize_t *plen)
{
	errno = ENOSYS;
	return NULL;
}

int sys_acl_free_text(char *text)
{
	errno = ENOSYS;
	return -1;
}

SMB_ACL_T sys_acl_init( int count)
{
	errno = ENOSYS;
	return NULL;
}

int sys_acl_create_entry( SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_set_tag_type( SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_set_qualifier( SMB_ACL_ENTRY_T entry, void *qual)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_set_permset( SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_valid( SMB_ACL_T theacl )
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_set_file( const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_set_fd( int fd, SMB_ACL_T theacl)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_delete_def_file(const char *name)
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_free_acl(SMB_ACL_T the_acl) 
{
	errno = ENOSYS;
	return -1;
}

int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
	errno = ENOSYS;
	return -1;
}

#endif /* No ACLs. */

/************************************************************************
 Deliberately outside the ACL defines. Return 1 if this is a "no acls"
 errno, 0 if not.
************************************************************************/

int no_acl_syscall_error(int err)
{
#if defined(ENOSYS)
	if (err == ENOSYS) {
		return 1;
	}
#endif
#if defined(ENOTSUP)
	if (err == ENOTSUP) {
		return 1;
	}
#endif
	return 0;
}
