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/* Routines for vectors of uids/gids
Copyright (C) 1995, 1996 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
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, 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. */
#ifndef __IDVEC_H__
#define __IDVEC_H__
#include <sys/types.h>
#include <errno.h>
#include <hurd/hurd_types.h>
#ifndef IDVEC_EI
#define IDVEC_EI extern inline
#endif
struct idvec
{
uid_t *ids;
unsigned num, alloced;
};
/* Return a new, empty, idvec, or NULL if there wasn't enough memory. */
struct idvec *make_idvec (void);
/* Free the storage pointed to by IDVEC->ids. */
void idvec_free_contents (struct idvec *idvec);
/* Free IDVEC, but not the storage pointed to by the IDS field. */
void idvec_free_wrapper (struct idvec *idvec);
/* Free IDVEC and any storage associated with it. */
void idvec_free (struct idvec *idvec);
/* Mark IDVEC as not containing any ids. */
IDVEC_EI void
idvec_clear (struct idvec *idvec)
{
idvec->num = 0;
}
/* Ensure that IDVEC has enough spaced allocated to hold NUM ids, thus
ensuring that any subsequent ids added won't return a memory allocation
error unless it would result in more ids that NUM. ENOMEM is returned if
a memory allocation error occurs. */
error_t idvec_ensure (struct idvec *idvec, unsigned num);
/* Like idvec_ensure(), but takes INC, the increment of the number of ids
already in IDVEC as an argument. */
error_t idvec_grow (struct idvec *idvec, unsigned inc);
/* Returns true if IDVEC contains ID, at or after position POS. */
int idvec_tail_contains (struct idvec *idvec, unsigned pos, uid_t id);
/* Returns true if IDVEC contains ID. */
int idvec_contains (struct idvec *idvec, uid_t id);
/* Insert ID into IDVEC at position POS, returning ENOMEM if there wasn't
enough memory, or 0. */
error_t idvec_insert (struct idvec *idvec, unsigned pos, uid_t id);
/* Add ID onto the end of IDVEC, returning ENOMEM if there's not enough memory,
or 0. */
error_t idvec_add (struct idvec *idvec, uid_t id);
/* If IDVEC doesn't contain ID, add it onto the end, returning ENOMEM if
there's not enough memory; otherwise, do nothing. */
error_t idvec_add_new (struct idvec *idvec, uid_t id);
/* If IDVEC doesn't contain ID at position POS or after, insert it at POS,
returning ENOMEM if there's not enough memory; otherwise, do nothing. */
error_t idvec_insert_new (struct idvec *idvec, unsigned pos, uid_t id);
/* Set the ids in IDVEC to IDS (NUM elements long); delete whatever
the previous ids were. */
error_t idvec_set_ids (struct idvec *idvec, id_t *ids, unsigned num);
/* Like idvec_set_ids, but get the new ids from new. */
error_t idvec_set (struct idvec *idvec, struct idvec *new);
/* Adds each id in the vector IDS (NUM elements long) to IDVEC, as if with
idvec_add_new(). */
error_t idvec_merge_ids (struct idvec *idvec, uid_t *ids, unsigned num);
/* Adds each id from NEW to IDVEC, as if with idvec_add_new(). */
error_t idvec_merge (struct idvec *idvec, struct idvec *new);
/* Remove any occurances of ID in IDVEC after position POS> Returns true if
anything was done. */
int idvec_remove (struct idvec *idvec, unsigned pos, uid_t id);
/* Deleted the id at position POS in IDVEC. */
void idvec_delete (struct idvec *idvec, unsigned pos);
/* Insert ID at position POS in IDVEC, remoint any instances of ID previously
present at POS or after. ENOMEM is returned if there's not enough memory,
otherwise 0. */
error_t idvec_insert_only (struct idvec *idvec, unsigned pos, uid_t id);
/* EFF and AVAIL should be idvec's corresponding to a process's effective and
available ids. ID replaces the first id in EFF, and what it replaces is
preserved by adding it to AVAIL (if not already present). If SECURE is
non-NULL, and ID was not previously present in either EFF or AVAIL, then
*SECURE is set to true. ENOMEM is returned if a malloc fails, otherwise
0. The return parameters are only touched if this call succeeds. */
error_t idvec_setid (struct idvec *eff, struct idvec *avail, uid_t id,
int *secure);
/* Add to all of EFF_UIDS, AVAIL_UIDS, EFF_GIDS, AVAIL_GIDS (as if with
idvec_merge) the ids associated with the auth port AUTH. Any of these
parameters may be NULL if that information isn't desired. */
error_t idvec_merge_auth (struct idvec *eff_uids, struct idvec *avail_uids,
struct idvec *eff_gids, struct idvec *avail_gids,
auth_t auth);
#endif /* __IDVEC_H__ */
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