FreeBSD-5.3/lib/libc/posix1e/acl_to_text.c
/*-
* Copyright (c) 1999-2002 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.
*/
/*
* acl_to_text - return a text string with a text representation of the acl
* in it.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/posix1e/acl_to_text.c,v 1.11 2003/07/24 23:33:25 rwatson Exp $");
#include <sys/types.h>
#include "namespace.h"
#include <sys/acl.h>
#include "un-namespace.h"
#include <sys/errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utmp.h>
#include "acl_support.h"
/*
* acl_to_text - generate a text form of an acl
* spec says nothing about output ordering, so leave in acl order
*
* This function will not produce nice results if it is called with
* a non-POSIX.1e semantics ACL.
*/
char *
acl_to_text(acl_t acl, ssize_t *len_p)
{
struct acl *acl_int;
char *buf, *tmpbuf;
char name_buf[UT_NAMESIZE+1];
char perm_buf[_POSIX1E_ACL_STRING_PERM_MAXSIZE+1],
effective_perm_buf[_POSIX1E_ACL_STRING_PERM_MAXSIZE+1];
int i, error, len;
uid_t ae_id;
acl_tag_t ae_tag;
acl_perm_t ae_perm, effective_perm, mask_perm;
buf = strdup("");
if (buf == NULL)
return(NULL);
if (acl == NULL) {
errno = EINVAL;
return(NULL);
}
acl_int = &acl->ats_acl;
mask_perm = ACL_PERM_BITS; /* effective is regular if no mask */
for (i = 0; i < acl_int->acl_cnt; i++)
if (acl_int->acl_entry[i].ae_tag == ACL_MASK)
mask_perm = acl_int->acl_entry[i].ae_perm;
for (i = 0; i < acl_int->acl_cnt; i++) {
ae_tag = acl_int->acl_entry[i].ae_tag;
ae_id = acl_int->acl_entry[i].ae_id;
ae_perm = acl_int->acl_entry[i].ae_perm;
switch(ae_tag) {
case ACL_USER_OBJ:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%suser::%s\n", buf,
perm_buf);
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
case ACL_USER:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
error = _posix1e_acl_id_to_name(ae_tag, ae_id,
UT_NAMESIZE+1, name_buf);
if (error)
goto error_label;
effective_perm = ae_perm & mask_perm;
if (effective_perm != ae_perm) {
error = _posix1e_acl_perm_to_string(
effective_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1,
effective_perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%suser:%s:%s\t\t# "
"effective: %s\n",
buf, name_buf, perm_buf,
effective_perm_buf);
} else {
len = asprintf(&tmpbuf, "%suser:%s:%s\n", buf,
name_buf, perm_buf);
}
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
case ACL_GROUP_OBJ:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
effective_perm = ae_perm & mask_perm;
if (effective_perm != ae_perm) {
error = _posix1e_acl_perm_to_string(
effective_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1,
effective_perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%sgroup::%s\t\t# "
"effective: %s\n",
buf, perm_buf, effective_perm_buf);
} else {
len = asprintf(&tmpbuf, "%sgroup::%s\n", buf,
perm_buf);
}
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
case ACL_GROUP:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
error = _posix1e_acl_id_to_name(ae_tag, ae_id,
UT_NAMESIZE+1, name_buf);
if (error)
goto error_label;
effective_perm = ae_perm & mask_perm;
if (effective_perm != ae_perm) {
error = _posix1e_acl_perm_to_string(
effective_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1,
effective_perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%sgroup:%s:%s\t\t# "
"effective: %s\n",
buf, name_buf, perm_buf,
effective_perm_buf);
} else {
len = asprintf(&tmpbuf, "%sgroup:%s:%s\n", buf,
name_buf, perm_buf);
}
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
case ACL_MASK:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%smask::%s\n", buf,
perm_buf);
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
case ACL_OTHER:
error = _posix1e_acl_perm_to_string(ae_perm,
_POSIX1E_ACL_STRING_PERM_MAXSIZE+1, perm_buf);
if (error)
goto error_label;
len = asprintf(&tmpbuf, "%sother::%s\n", buf,
perm_buf);
if (len == -1)
goto error_label;
free(buf);
buf = tmpbuf;
break;
default:
errno = EINVAL;
goto error_label;
}
}
if (len_p) {
*len_p = strlen(buf);
}
return (buf);
error_label:
/* jump to here sets errno already, we just clean up */
if (buf) free(buf);
return (NULL);
}