mirror of
https://github.com/freebsd/freebsd-src
synced 2024-07-22 18:56:38 +00:00
559a218c9b
These sys/cdefs.h are not needed. Purge them. They are mostly left-over from the $FreeBSD$ removal. A few in libc are still required for macros that cdefs.h defines. Keep those. Sponsored by: Netflix Differential Revision: https://reviews.freebsd.org/D42385
313 lines
6.8 KiB
C
313 lines
6.8 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 1999, 2000, 2001 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_from_text: Convert a text-form ACL from a string to an acl_t.
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include "namespace.h"
|
|
#include <sys/acl.h>
|
|
#include "un-namespace.h"
|
|
#include <sys/errno.h>
|
|
#include <grp.h>
|
|
#include <pwd.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "acl_support.h"
|
|
|
|
static acl_tag_t acl_string_to_tag(char *tag, char *qualifier);
|
|
|
|
int _nfs4_acl_entry_from_text(acl_t aclp, char *entry);
|
|
int _text_could_be_nfs4_acl(const char *entry);
|
|
|
|
static acl_tag_t
|
|
acl_string_to_tag(char *tag, char *qualifier)
|
|
{
|
|
|
|
if (*qualifier == '\0') {
|
|
if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
|
|
return (ACL_USER_OBJ);
|
|
} else
|
|
if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
|
|
return (ACL_GROUP_OBJ);
|
|
} else
|
|
if ((!strcmp(tag, "mask")) || (!strcmp(tag, "m"))) {
|
|
return (ACL_MASK);
|
|
} else
|
|
if ((!strcmp(tag, "other")) || (!strcmp(tag, "o"))) {
|
|
return (ACL_OTHER);
|
|
} else
|
|
return(-1);
|
|
} else {
|
|
if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
|
|
return(ACL_USER);
|
|
} else
|
|
if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
|
|
return(ACL_GROUP);
|
|
} else
|
|
return(-1);
|
|
}
|
|
}
|
|
|
|
static int
|
|
_posix1e_acl_entry_from_text(acl_t aclp, char *entry)
|
|
{
|
|
acl_tag_t t;
|
|
acl_perm_t p;
|
|
char *tag, *qualifier, *permission;
|
|
uid_t id;
|
|
int error;
|
|
|
|
assert(_acl_brand(aclp) == ACL_BRAND_POSIX);
|
|
|
|
/* Split into three ':' delimited fields. */
|
|
tag = strsep(&entry, ":");
|
|
if (tag == NULL) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
tag = string_skip_whitespace(tag);
|
|
if ((*tag == '\0') && (!entry)) {
|
|
/*
|
|
* Is an entirely comment line, skip to next
|
|
* comma.
|
|
*/
|
|
return (0);
|
|
}
|
|
string_trim_trailing_whitespace(tag);
|
|
|
|
qualifier = strsep(&entry, ":");
|
|
if (qualifier == NULL) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
qualifier = string_skip_whitespace(qualifier);
|
|
string_trim_trailing_whitespace(qualifier);
|
|
|
|
permission = strsep(&entry, ":");
|
|
if (permission == NULL || entry) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
permission = string_skip_whitespace(permission);
|
|
string_trim_trailing_whitespace(permission);
|
|
|
|
t = acl_string_to_tag(tag, qualifier);
|
|
if (t == -1) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
error = _posix1e_acl_string_to_perm(permission, &p);
|
|
if (error == -1) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
switch(t) {
|
|
case ACL_USER_OBJ:
|
|
case ACL_GROUP_OBJ:
|
|
case ACL_MASK:
|
|
case ACL_OTHER:
|
|
if (*qualifier != '\0') {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
id = 0;
|
|
break;
|
|
|
|
case ACL_USER:
|
|
case ACL_GROUP:
|
|
error = _acl_name_to_id(t, qualifier, &id);
|
|
if (error == -1)
|
|
return (-1);
|
|
break;
|
|
|
|
default:
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
error = _posix1e_acl_add_entry(aclp, t, id, p);
|
|
if (error == -1)
|
|
return (-1);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
_text_is_nfs4_entry(const char *entry)
|
|
{
|
|
int count = 0;
|
|
|
|
assert(strlen(entry) > 0);
|
|
|
|
while (*entry != '\0') {
|
|
if (*entry == ':' || *entry == '@')
|
|
count++;
|
|
entry++;
|
|
}
|
|
|
|
if (count <= 2)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* acl_from_text -- Convert a string into an ACL.
|
|
* Postpone most validity checking until the end and call acl_valid() to do
|
|
* that.
|
|
*/
|
|
acl_t
|
|
acl_from_text(const char *buf_p)
|
|
{
|
|
acl_t acl;
|
|
char *mybuf_p, *line, *cur, *notcomment, *comment, *entry;
|
|
int error;
|
|
|
|
/* Local copy we can mess up. */
|
|
mybuf_p = strdup(buf_p);
|
|
if (mybuf_p == NULL)
|
|
return(NULL);
|
|
|
|
acl = acl_init(3); /* XXX: WTF, 3? */
|
|
if (acl == NULL) {
|
|
free(mybuf_p);
|
|
return(NULL);
|
|
}
|
|
|
|
/* Outer loop: delimit at \n boundaries. */
|
|
cur = mybuf_p;
|
|
while ((line = strsep(&cur, "\n"))) {
|
|
/* Now split the line on the first # to strip out comments. */
|
|
comment = line;
|
|
notcomment = strsep(&comment, "#");
|
|
|
|
/* Inner loop: delimit at ',' boundaries. */
|
|
while ((entry = strsep(¬comment, ","))) {
|
|
|
|
/* Skip empty lines. */
|
|
if (strlen(string_skip_whitespace(entry)) == 0)
|
|
continue;
|
|
|
|
if (_acl_brand(acl) == ACL_BRAND_UNKNOWN) {
|
|
if (_text_is_nfs4_entry(entry))
|
|
_acl_brand_as(acl, ACL_BRAND_NFS4);
|
|
else
|
|
_acl_brand_as(acl, ACL_BRAND_POSIX);
|
|
}
|
|
|
|
switch (_acl_brand(acl)) {
|
|
case ACL_BRAND_NFS4:
|
|
error = _nfs4_acl_entry_from_text(acl, entry);
|
|
break;
|
|
|
|
case ACL_BRAND_POSIX:
|
|
error = _posix1e_acl_entry_from_text(acl, entry);
|
|
break;
|
|
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
if (error)
|
|
goto error_label;
|
|
}
|
|
}
|
|
|
|
#if 0
|
|
/* XXX Should we only return ACLs valid according to acl_valid? */
|
|
/* Verify validity of the ACL we read in. */
|
|
if (acl_valid(acl) == -1) {
|
|
errno = EINVAL;
|
|
goto error_label;
|
|
}
|
|
#endif
|
|
|
|
free(mybuf_p);
|
|
return(acl);
|
|
|
|
error_label:
|
|
acl_free(acl);
|
|
free(mybuf_p);
|
|
return(NULL);
|
|
}
|
|
|
|
/*
|
|
* Given a username/groupname from a text form of an ACL, return the uid/gid
|
|
* XXX NOT THREAD SAFE, RELIES ON GETPWNAM, GETGRNAM
|
|
* XXX USES *PW* AND *GR* WHICH ARE STATEFUL AND THEREFORE THIS ROUTINE
|
|
* MAY HAVE SIDE-EFFECTS
|
|
*/
|
|
int
|
|
_acl_name_to_id(acl_tag_t tag, char *name, uid_t *id)
|
|
{
|
|
struct group *g;
|
|
struct passwd *p;
|
|
unsigned long l;
|
|
char *endp;
|
|
|
|
switch(tag) {
|
|
case ACL_USER:
|
|
p = getpwnam(name);
|
|
if (p == NULL) {
|
|
l = strtoul(name, &endp, 0);
|
|
if (*endp != '\0' || l != (unsigned long)(uid_t)l) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
*id = (uid_t)l;
|
|
return (0);
|
|
}
|
|
*id = p->pw_uid;
|
|
return (0);
|
|
|
|
case ACL_GROUP:
|
|
g = getgrnam(name);
|
|
if (g == NULL) {
|
|
l = strtoul(name, &endp, 0);
|
|
if (*endp != '\0' || l != (unsigned long)(gid_t)l) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
*id = (gid_t)l;
|
|
return (0);
|
|
}
|
|
*id = g->gr_gid;
|
|
return (0);
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
}
|