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/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "tool_setup.h"
#include "tool_xattr.h"
#include "memdebug.h" /* keep this as LAST include */
#ifdef USE_XATTR
/* mapping table of curl metadata to extended attribute names */
static const struct xattr_mapping {
const char *attr; /* name of the xattr */
CURLINFO info;
} mappings[] = {
/* mappings proposed by
* https://freedesktop.org/wiki/CommonExtendedAttributes/
*/
{ "user.xdg.referrer.url", CURLINFO_REFERER },
{ "user.mime_type", CURLINFO_CONTENT_TYPE },
{ NULL, CURLINFO_NONE } /* last element, abort here */
};
/* returns a new URL that needs to be freed */
/* @unittest: 1621 */
#ifdef UNITTESTS
char *stripcredentials(const char *url);
#else
static
#endif
char *stripcredentials(const char *url)
{
CURLU *u;
CURLUcode uc;
char *nurl;
u = curl_url();
if(u) {
uc = curl_url_set(u, CURLUPART_URL, url, 0);
if(uc)
goto error;
uc = curl_url_set(u, CURLUPART_USER, NULL, 0);
if(uc)
goto error;
uc = curl_url_set(u, CURLUPART_PASSWORD, NULL, 0);
if(uc)
goto error;
uc = curl_url_get(u, CURLUPART_URL, &nurl, 0);
if(uc)
goto error;
curl_url_cleanup(u);
return nurl;
}
error:
curl_url_cleanup(u);
return NULL;
}
static int xattr(int fd,
const char *attr, /* name of the xattr */
const char *value)
{
int err = 0;
if(value) {
#ifdef DEBUGBUILD
if(getenv("CURL_FAKE_XATTR")) {
printf("%s => %s\n", attr, value);
}
return 0;
#endif
#ifdef HAVE_FSETXATTR_6
err = fsetxattr(fd, attr, value, strlen(value), 0, 0);
#elif defined(HAVE_FSETXATTR_5)
err = fsetxattr(fd, attr, value, strlen(value), 0);
#elif defined(__FreeBSD_version) || defined(__MidnightBSD_version)
{
ssize_t rc = extattr_set_fd(fd, EXTATTR_NAMESPACE_USER,
attr, value, strlen(value));
/* FreeBSD's extattr_set_fd returns the length of the extended
attribute */
err = (rc < 0 ? -1 : 0);
}
#endif
}
return err;
}
/* store metadata from the curl request alongside the downloaded
* file using extended attributes
*/
int fwrite_xattr(CURL *curl, const char *url, int fd)
{
int i = 0;
int err = 0;
/* loop through all xattr-curlinfo pairs and abort on a set error */
while(!err && mappings[i].attr) {
char *value = NULL;
CURLcode result = curl_easy_getinfo(curl, mappings[i].info, &value);
if(!result && value)
err = xattr(fd, mappings[i].attr, value);
i++;
}
if(!err) {
char *nurl = stripcredentials(url);
if(!nurl)
return 1;
err = xattr(fd, "user.xdg.origin.url", nurl);
curl_free(nurl);
}
return err;
}
#endif
|
