source: azure_iot_hub/trunk/curl-7.57.0/src/tool_xattr.c@ 389

Last change on this file since 389 was 389, checked in by coas-nagasima, 5 years ago

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1/***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include "tool_setup.h"
23
24#ifdef HAVE_FSETXATTR
25# include <sys/xattr.h> /* header from libc, not from libattr */
26# define USE_XATTR
27#elif defined(__FreeBSD_version) && (__FreeBSD_version > 500000)
28# include <sys/types.h>
29# include <sys/extattr.h>
30# define USE_XATTR
31#endif
32
33#include "tool_xattr.h"
34
35#include "memdebug.h" /* keep this as LAST include */
36
37#ifdef USE_XATTR
38
39/* mapping table of curl metadata to extended attribute names */
40static const struct xattr_mapping {
41 const char *attr; /* name of the xattr */
42 CURLINFO info;
43} mappings[] = {
44 /* mappings proposed by
45 * https://freedesktop.org/wiki/CommonExtendedAttributes/
46 */
47 { "user.xdg.origin.url", CURLINFO_EFFECTIVE_URL },
48 { "user.mime_type", CURLINFO_CONTENT_TYPE },
49 { NULL, CURLINFO_NONE } /* last element, abort loop here */
50};
51
52/* store metadata from the curl request alongside the downloaded
53 * file using extended attributes
54 */
55int fwrite_xattr(CURL *curl, int fd)
56{
57 int i = 0;
58 int err = 0;
59
60 /* loop through all xattr-curlinfo pairs and abort on a set error */
61 while(err == 0 && mappings[i].attr != NULL) {
62 char *value = NULL;
63 CURLcode result = curl_easy_getinfo(curl, mappings[i].info, &value);
64 if(!result && value) {
65#ifdef HAVE_FSETXATTR_6
66 err = fsetxattr(fd, mappings[i].attr, value, strlen(value), 0, 0);
67#elif defined(HAVE_FSETXATTR_5)
68 err = fsetxattr(fd, mappings[i].attr, value, strlen(value), 0);
69#elif defined(__FreeBSD_version)
70 err = extattr_set_fd(fd, EXTATTR_NAMESPACE_USER, mappings[i].attr, value,
71 strlen(value));
72 /* FreeBSD's extattr_set_fd returns the length of the extended attribute
73 */
74 err = err < 0 ? err : 0;
75#endif
76 }
77 i++;
78 }
79
80 return err;
81}
82#else
83int fwrite_xattr(CURL *curl, int fd)
84{
85 (void)curl;
86 (void)fd;
87
88 return 0;
89}
90#endif
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