* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
381 lines
7.8 KiB
C
381 lines
7.8 KiB
C
/* $NetBSD: extattr.c,v 1.4 2012/03/13 21:13:34 christos Exp $ */
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/*-
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* Copyright (c) 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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* TrustedBSD: Utility functions for extended attributes.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: extattr.c,v 1.4 2012/03/13 21:13:34 christos Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/extattr.h>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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const int extattr_namespaces[] = {
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EXTATTR_NAMESPACE_USER,
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EXTATTR_NAMESPACE_SYSTEM,
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0,
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};
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int
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extattr_namespace_to_string(int attrnamespace, char **string)
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{
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switch(attrnamespace) {
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case EXTATTR_NAMESPACE_USER:
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if (string != NULL) {
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if ((*string =
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strdup(EXTATTR_NAMESPACE_USER_STRING)) == NULL)
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return (-1);
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}
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return (0);
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case EXTATTR_NAMESPACE_SYSTEM:
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if (string != NULL)
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if ((*string =
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strdup(EXTATTR_NAMESPACE_SYSTEM_STRING)) == NULL)
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return (-1);
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return (0);
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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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}
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int
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extattr_string_to_namespace(const char *string, int *attrnamespace)
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{
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if (strcmp(string, EXTATTR_NAMESPACE_USER_STRING) == 0) {
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if (attrnamespace != NULL)
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*attrnamespace = EXTATTR_NAMESPACE_USER;
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return (0);
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} else if (strcmp(string, EXTATTR_NAMESPACE_SYSTEM_STRING) == 0) {
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if (attrnamespace != NULL)
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*attrnamespace = EXTATTR_NAMESPACE_SYSTEM;
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return (0);
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} else {
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errno = EINVAL;
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return (-1);
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}
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}
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int
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extattr_copy_fd(int from_fd, int to_fd, int namespace)
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{
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ssize_t llen, vlen, maxvlen;
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size_t alen;
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void *alist = NULL;
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void *aval = NULL;
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size_t i;
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int error = -1;
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llen = extattr_list_fd(from_fd, namespace, NULL, 0);
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if (llen == -1) {
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/* Silently ignore when EA are not supported */
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if (errno == EOPNOTSUPP)
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error = 0;
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goto out;
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}
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if (llen == 0) {
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error = 0;
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goto out;
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}
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if ((alist = malloc((size_t)llen)) == NULL)
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goto out;
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llen = extattr_list_fd(from_fd, namespace, alist, (size_t)llen);
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if (llen == -1)
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goto out;
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maxvlen = 1024;
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if ((aval = malloc((size_t)maxvlen)) == NULL)
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goto out;
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for (i = 0; i < (size_t)llen; i += alen + 1) {
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char aname[NAME_MAX + 1];
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char *ap;
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alen = ((uint8_t *)alist)[i];
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ap = ((char *)alist) + i + 1;
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(void)memcpy(aname, ap, alen);
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aname[alen] = '\0';
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vlen = extattr_get_fd(from_fd, namespace, aname, NULL, 0);
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if (vlen == -1)
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goto out;
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if (vlen > maxvlen) {
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if ((aval = realloc(aval, (size_t)vlen)) == NULL)
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goto out;
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maxvlen = vlen;
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}
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if ((vlen = extattr_get_fd(from_fd, namespace, aname,
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aval, (size_t)vlen)) == -1)
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goto out;
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if (extattr_set_fd(to_fd, namespace, aname,
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aval, (size_t)vlen) != vlen)
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goto out;
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}
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error = 0;
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out:
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if (aval != NULL)
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free(aval);
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if (alist != NULL)
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free(alist);
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return error;
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}
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int
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extattr_copy_file(const char *from, const char *to, int namespace)
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{
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ssize_t llen, vlen, maxvlen;
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size_t alen;
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void *alist = NULL;
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void *aval = NULL;
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size_t i;
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int error = -1;
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llen = extattr_list_file(from, namespace, NULL, 0);
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if (llen == -1) {
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/* Silently ignore when EA are not supported */
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if (errno == EOPNOTSUPP)
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error = 0;
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goto out;
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}
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if (llen == 0) {
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error = 0;
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goto out;
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}
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if ((alist = malloc((size_t)llen)) == NULL)
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goto out;
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llen = extattr_list_file(from, namespace, alist, (size_t)llen);
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if (llen == -1)
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goto out;
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maxvlen = 1024;
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if ((aval = malloc((size_t)maxvlen)) == NULL)
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goto out;
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for (i = 0; i < (size_t)llen; i += alen + 1) {
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char aname[NAME_MAX + 1];
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char *ap;
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alen = ((uint8_t *)alist)[i];
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ap = ((char *)alist) + i + 1;
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(void)memcpy(aname, ap, alen);
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aname[alen] = '\0';
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vlen = extattr_get_file(from, namespace, aname, NULL, 0);
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if (vlen == -1)
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goto out;
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if (vlen > maxvlen) {
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if ((aval = realloc(aval, (size_t)vlen)) == NULL)
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goto out;
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maxvlen = vlen;
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}
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if ((vlen = extattr_get_file(from, namespace, aname, aval, (size_t)vlen)) == -1)
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goto out;
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if (extattr_set_file(to, namespace, aname,
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aval, (size_t)vlen) != vlen)
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goto out;
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}
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error = 0;
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out:
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if (aval != NULL)
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free(aval);
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if (alist != NULL)
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free(alist);
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return error;
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}
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int
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extattr_copy_link(const char *from, const char *to, int namespace)
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{
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ssize_t llen, vlen, maxvlen;
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size_t alen;
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void *alist = NULL;
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void *aval = NULL;
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size_t i;
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int error = -1;
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llen = extattr_list_link(from, namespace, NULL, 0);
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if (llen == -1) {
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/* Silently ignore when EA are not supported */
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if (errno == EOPNOTSUPP)
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error = 0;
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goto out;
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}
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if (llen == 0) {
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error = 0;
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goto out;
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}
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if ((alist = malloc((size_t)llen)) == NULL)
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goto out;
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llen = extattr_list_link(from, namespace, alist, (size_t)llen);
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if (llen == -1)
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goto out;
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maxvlen = 1024;
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if ((aval = malloc((size_t)maxvlen)) == NULL)
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goto out;
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for (i = 0; i < (size_t)llen; i += alen + 1) {
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char aname[NAME_MAX + 1];
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char *ap;
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alen = ((uint8_t *)alist)[i];
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ap = ((char *)alist) + i + 1;
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(void)memcpy(aname, ap, alen);
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aname[alen] = '\0';
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vlen = extattr_get_link(from, namespace, aname, NULL, 0);
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if (vlen == -1)
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goto out;
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if (vlen > maxvlen) {
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if ((aval = realloc(aval, (size_t)vlen)) == NULL)
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goto out;
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maxvlen = vlen;
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}
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if ((vlen = extattr_get_link(from, namespace, aname,
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aval, (size_t)vlen)) == -1)
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goto out;
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if (extattr_set_link(to, namespace, aname,
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aval, (size_t)vlen) != vlen)
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goto out;
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}
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error = 0;
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out:
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if (aval != NULL)
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free(aval);
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if (alist != NULL)
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free(alist);
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return error;
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}
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static int
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extattr_namespace_access(int namespace, int mode)
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{
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switch (namespace) {
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case EXTATTR_NAMESPACE_SYSTEM:
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if ((mode & (R_OK|W_OK)) && getuid() != 0)
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return -1;
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break;
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default:
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break;
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}
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return 0;
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}
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int
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fcpxattr(int from_fd, int to_fd)
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{
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const int *ns;
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int error;
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for (ns = extattr_namespaces; *ns; ns++) {
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if (extattr_namespace_access(*ns, R_OK|W_OK) != 0)
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continue;
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if ((error = extattr_copy_fd(from_fd, to_fd, *ns)) != 0)
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return error;
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}
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return 0;
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}
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int
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cpxattr(const char *from, const char *to)
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{
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const int *ns;
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int error;
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for (ns = extattr_namespaces; *ns; ns++) {
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if (extattr_namespace_access(*ns, R_OK|W_OK) != 0)
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continue;
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if ((error = extattr_copy_file(from, to, *ns)) != 0)
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return error;
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}
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return 0;
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}
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int
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lcpxattr(const char *from, const char *to)
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{
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const int *ns;
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int error;
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for (ns = extattr_namespaces; *ns; ns++) {
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if (extattr_namespace_access(*ns, R_OK|W_OK) != 0)
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continue;
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if ((error = extattr_copy_link(from, to, *ns)) != 0)
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return error;
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}
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return 0;
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}
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