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/*-
* Copyright (c) 1999-2001, 2008 Robert N. M. Watson
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Support functionality for the POSIX.1e ACL interface
* These calls are intended only to be called within the library.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include "namespace.h"
#include <sys/acl.h>
#include "un-namespace.h"
#include <errno.h>
#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include "acl_support.h"
/*
* Given a uid/gid, return a username/groupname for the text form of an ACL.
* Note that we truncate user and group names, rather than error out, as
* this is consistent with other tools manipulating user and group names.
* XXX NOT THREAD SAFE, RELIES ON GETPWUID, GETGRGID
* XXX USES *PW* AND *GR* WHICH ARE STATEFUL AND THEREFORE THIS ROUTINE
* MAY HAVE SIDE-EFFECTS
*/
int
_posix1e_acl_id_to_name(acl_tag_t tag, uid_t id, ssize_t buf_len, char *buf,
int flags)
{
struct group *g;
struct passwd *p;
int i;
switch(tag) {
case ACL_USER:
if (flags & ACL_TEXT_NUMERIC_IDS)
p = NULL;
else
p = getpwuid(id);
if (!p)
i = snprintf(buf, buf_len, "%d", id);
else
i = snprintf(buf, buf_len, "%s", p->pw_name);
if (i < 0) {
errno = ENOMEM;
return (-1);
}
return (0);
case ACL_GROUP:
if (flags & ACL_TEXT_NUMERIC_IDS)
g = NULL;
else
g = getgrgid(id);
if (g == NULL)
i = snprintf(buf, buf_len, "%d", id);
else
i = snprintf(buf, buf_len, "%s", g->gr_name);
if (i < 0) {
errno = ENOMEM;
return (-1);
}
return (0);
default:
return (EINVAL);
}
}
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