9014a6e40c
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
316 lines
6.9 KiB
C
316 lines
6.9 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 1999, 2000, 2001 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* acl_from_text: Convert a text-form ACL from a string to an acl_t.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include "namespace.h"
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#include <sys/acl.h>
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#include "un-namespace.h"
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#include <sys/errno.h>
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#include <grp.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "acl_support.h"
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static acl_tag_t acl_string_to_tag(char *tag, char *qualifier);
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int _nfs4_acl_entry_from_text(acl_t aclp, char *entry);
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int _text_could_be_nfs4_acl(const char *entry);
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static acl_tag_t
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acl_string_to_tag(char *tag, char *qualifier)
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{
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if (*qualifier == '\0') {
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if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
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return (ACL_USER_OBJ);
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} else
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if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
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return (ACL_GROUP_OBJ);
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} else
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if ((!strcmp(tag, "mask")) || (!strcmp(tag, "m"))) {
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return (ACL_MASK);
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} else
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if ((!strcmp(tag, "other")) || (!strcmp(tag, "o"))) {
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return (ACL_OTHER);
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} else
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return(-1);
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} else {
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if ((!strcmp(tag, "user")) || (!strcmp(tag, "u"))) {
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return(ACL_USER);
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} else
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if ((!strcmp(tag, "group")) || (!strcmp(tag, "g"))) {
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return(ACL_GROUP);
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} else
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return(-1);
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}
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}
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static int
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_posix1e_acl_entry_from_text(acl_t aclp, char *entry)
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{
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acl_tag_t t;
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acl_perm_t p;
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char *tag, *qualifier, *permission;
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uid_t id;
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int error;
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assert(_acl_brand(aclp) == ACL_BRAND_POSIX);
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/* Split into three ':' delimited fields. */
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tag = strsep(&entry, ":");
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if (tag == NULL) {
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errno = EINVAL;
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return (-1);
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}
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tag = string_skip_whitespace(tag);
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if ((*tag == '\0') && (!entry)) {
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/*
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* Is an entirely comment line, skip to next
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* comma.
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*/
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return (0);
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}
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string_trim_trailing_whitespace(tag);
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qualifier = strsep(&entry, ":");
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if (qualifier == NULL) {
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errno = EINVAL;
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return (-1);
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}
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qualifier = string_skip_whitespace(qualifier);
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string_trim_trailing_whitespace(qualifier);
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permission = strsep(&entry, ":");
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if (permission == NULL || entry) {
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errno = EINVAL;
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return (-1);
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}
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permission = string_skip_whitespace(permission);
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string_trim_trailing_whitespace(permission);
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t = acl_string_to_tag(tag, qualifier);
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if (t == -1) {
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errno = EINVAL;
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return (-1);
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}
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error = _posix1e_acl_string_to_perm(permission, &p);
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if (error == -1) {
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errno = EINVAL;
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return (-1);
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}
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switch(t) {
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case ACL_USER_OBJ:
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case ACL_GROUP_OBJ:
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case ACL_MASK:
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case ACL_OTHER:
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if (*qualifier != '\0') {
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errno = EINVAL;
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return (-1);
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}
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id = 0;
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break;
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case ACL_USER:
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case ACL_GROUP:
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error = _acl_name_to_id(t, qualifier, &id);
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if (error == -1)
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return (-1);
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break;
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default:
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errno = EINVAL;
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return (-1);
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}
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error = _posix1e_acl_add_entry(aclp, t, id, p);
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if (error == -1)
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return (-1);
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return (0);
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}
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static int
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_text_is_nfs4_entry(const char *entry)
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{
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int count = 0;
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assert(strlen(entry) > 0);
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while (*entry != '\0') {
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if (*entry == ':' || *entry == '@')
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count++;
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entry++;
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}
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if (count <= 2)
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return (0);
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return (1);
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}
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/*
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* acl_from_text -- Convert a string into an ACL.
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* Postpone most validity checking until the end and call acl_valid() to do
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* that.
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*/
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acl_t
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acl_from_text(const char *buf_p)
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{
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acl_t acl;
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char *mybuf_p, *line, *cur, *notcomment, *comment, *entry;
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int error;
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/* Local copy we can mess up. */
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mybuf_p = strdup(buf_p);
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if (mybuf_p == NULL)
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return(NULL);
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acl = acl_init(3); /* XXX: WTF, 3? */
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if (acl == NULL) {
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free(mybuf_p);
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return(NULL);
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}
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/* Outer loop: delimit at \n boundaries. */
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cur = mybuf_p;
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while ((line = strsep(&cur, "\n"))) {
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/* Now split the line on the first # to strip out comments. */
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comment = line;
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notcomment = strsep(&comment, "#");
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/* Inner loop: delimit at ',' boundaries. */
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while ((entry = strsep(¬comment, ","))) {
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/* Skip empty lines. */
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if (strlen(string_skip_whitespace(entry)) == 0)
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continue;
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if (_acl_brand(acl) == ACL_BRAND_UNKNOWN) {
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if (_text_is_nfs4_entry(entry))
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_acl_brand_as(acl, ACL_BRAND_NFS4);
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else
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_acl_brand_as(acl, ACL_BRAND_POSIX);
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}
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switch (_acl_brand(acl)) {
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case ACL_BRAND_NFS4:
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error = _nfs4_acl_entry_from_text(acl, entry);
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break;
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case ACL_BRAND_POSIX:
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error = _posix1e_acl_entry_from_text(acl, entry);
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break;
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default:
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error = EINVAL;
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break;
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}
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if (error)
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goto error_label;
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}
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}
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#if 0
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/* XXX Should we only return ACLs valid according to acl_valid? */
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/* Verify validity of the ACL we read in. */
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if (acl_valid(acl) == -1) {
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errno = EINVAL;
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goto error_label;
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}
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#endif
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free(mybuf_p);
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return(acl);
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error_label:
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acl_free(acl);
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free(mybuf_p);
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return(NULL);
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}
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/*
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* Given a username/groupname from a text form of an ACL, return the uid/gid
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* XXX NOT THREAD SAFE, RELIES ON GETPWNAM, GETGRNAM
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* XXX USES *PW* AND *GR* WHICH ARE STATEFUL AND THEREFORE THIS ROUTINE
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* MAY HAVE SIDE-EFFECTS
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*/
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int
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_acl_name_to_id(acl_tag_t tag, char *name, uid_t *id)
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{
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struct group *g;
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struct passwd *p;
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unsigned long l;
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char *endp;
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switch(tag) {
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case ACL_USER:
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p = getpwnam(name);
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if (p == NULL) {
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l = strtoul(name, &endp, 0);
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if (*endp != '\0' || l != (unsigned long)(uid_t)l) {
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errno = EINVAL;
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return (-1);
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}
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*id = (uid_t)l;
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return (0);
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}
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*id = p->pw_uid;
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return (0);
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case ACL_GROUP:
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g = getgrnam(name);
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if (g == NULL) {
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l = strtoul(name, &endp, 0);
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if (*endp != '\0' || l != (unsigned long)(gid_t)l) {
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errno = EINVAL;
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return (-1);
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}
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*id = (gid_t)l;
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return (0);
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}
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*id = g->gr_gid;
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return (0);
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default:
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return (EINVAL);
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}
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}
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