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-rw-r--r--src/xattr.h46
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diff --git a/src/xattr.h b/src/xattr.h
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+/* xattr.h -- POSIX Extended Attribute function mappings.
+
+ Copyright (C) 2016, 2018-2023 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>. */
+
+#include <stdio.h>
+#include <url.h>
+
+#ifndef _XATTR_H
+#define _XATTR_H
+
+/* Store metadata name/value attributes against fp. */
+int set_file_metadata (const struct url *origin_url, const struct url *referrer_url, FILE *fp);
+
+#if defined(__linux)
+/* libc on Linux has fsetxattr (5 arguments). */
+# include <sys/xattr.h>
+# define USE_XATTR
+#elif defined(__APPLE__)
+/* libc on OS/X has fsetxattr (6 arguments). */
+# include <sys/xattr.h>
+# define fsetxattr(file, name, buffer, size, flags) \
+ fsetxattr ((file), (name), (buffer), (size), 0, (flags))
+# define USE_XATTR
+#elif defined(__FreeBSD_version) && (__FreeBSD_version > 500000)
+/* FreeBSD */
+# include <sys/types.h>
+# include <sys/extattr.h>
+# define fsetxattr(file, name, buffer, size, flags) \
+ extattr_set_fd ((file), EXTATTR_NAMESPACE_USER, (name), (buffer), (size))
+# define USE_XATTR
+#endif
+
+#endif /* _XATTR_H */