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xattr: add configure check and #ifdefs

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setxattr is a glibc call to set extended attributes, so configure now
checks for it and the code is adapted to only build when the
functionality is present.
This commit is contained in:
Daniel Stenberg 2010-11-05 14:07:38 +01:00
parent fbf51696ef
commit 95719fbea6
5 changed files with 152 additions and 10 deletions
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1
configure.ac
View File

@ -2349,6 +2349,7 @@ CURL_CHECK_FUNC_LOCALTIME_R
CURL_CHECK_FUNC_MEMRCHR
CURL_CHECK_FUNC_POLL
CURL_CHECK_FUNC_SETSOCKOPT
CURL_CHECK_FUNC_SETXATTR
CURL_CHECK_FUNC_SIGACTION
CURL_CHECK_FUNC_SIGINTERRUPT
CURL_CHECK_FUNC_SIGNAL

84
m4/curl-functions.m4
View File

@ -5903,3 +5903,87 @@ AC_DEFUN([CURL_CHECK_FUNC_WRITEV], [
ac_cv_func_writev="no"
fi
])
dnl CURL_CHECK_FUNC_SETXATTR
dnl -------------------------------------------------
dnl Verify if setxattr is available, prototyped, and
dnl can be compiled. If all of these are true, and
dnl usage has not been previously disallowed with
dnl shell variable curl_disallow_setxattr, then
dnl HAVE_SETXATTR will be defined.
AC_DEFUN([CURL_CHECK_FUNC_SETXATTR], [
AC_REQUIRE([CURL_INCLUDES_SYS_UIO])dnl
#
tst_links_setxattr="unknown"
tst_proto_setxattr="unknown"
tst_compi_setxattr="unknown"
tst_allow_setxattr="unknown"
#
AC_MSG_CHECKING([if setxattr can be linked])
AC_LINK_IFELSE([
AC_LANG_FUNC_LINK_TRY([setxattr])
],[
AC_MSG_RESULT([yes])
tst_links_setxattr="yes"
],[
AC_MSG_RESULT([no])
tst_links_setxattr="no"
])
#
if test "$tst_links_setxattr" = "yes"; then
AC_MSG_CHECKING([if setxattr is prototyped])
AC_EGREP_CPP([setxattr],[
$curl_includes_sys_uio
],[
AC_MSG_RESULT([yes])
tst_proto_setxattr="yes"
],[
AC_MSG_RESULT([no])
tst_proto_setxattr="no"
])
fi
#
if test "$tst_proto_setxattr" = "yes"; then
AC_MSG_CHECKING([if setxattr is compilable])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
$curl_includes_sys_uio
]],[[
if(0 != setxattr(0, 0, 0))
return 1;
]])
],[
AC_MSG_RESULT([yes])
tst_compi_setxattr="yes"
],[
AC_MSG_RESULT([no])
tst_compi_setxattr="no"
])
fi
#
if test "$tst_compi_setxattr" = "yes"; then
AC_MSG_CHECKING([if setxattr usage allowed])
if test "x$curl_disallow_setxattr" != "xyes"; then
AC_MSG_RESULT([yes])
tst_allow_setxattr="yes"
else
AC_MSG_RESULT([no])
tst_allow_setxattr="no"
fi
fi
#
AC_MSG_CHECKING([if setxattr might be used])
if test "$tst_links_setxattr" = "yes" &&
test "$tst_proto_setxattr" = "yes" &&
test "$tst_compi_setxattr" = "yes" &&
test "$tst_allow_setxattr" = "yes"; then
AC_MSG_RESULT([yes])
AC_DEFINE_UNQUOTED(HAVE_SETXATTR, 1,
[Define to 1 if you have the setxattr function.])
ac_cv_func_setxattr="yes"
else
AC_MSG_RESULT([no])
ac_cv_func_setxattr="no"
fi
])

8
src/main.c
View File

@ -5648,12 +5648,10 @@ operate(struct Configurable *config, int argc, argv_item_t argv[])
}
if(config->xattr && outs.filename) {
char *url = NULL;
curl_easy_getinfo(curl, CURLINFO_EFFECTIVE_URL, &url);
int err = write_xattr(curl, outs.filename );
if (err) {
warnf( config, "Error setting extended attributes: %s\n", strerror(errno) );
}
if(err)
warnf( config, "Error setting extended attributes: %s\n",
strerror(errno) );
}
#ifdef HAVE_UTIME

40
src/xattr.c
View File

@ -1,9 +1,35 @@
#include <sys/types.h>
#include <sys/xattr.h> /* include header from libc, not from libattr */
#include <string.h>
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2010, 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 http://curl.haxx.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.
*
***************************************************************************/
/* client-local setup.h */
#include "setup.h"
#include <curl/curl.h>
#include "xattr.h"
#ifdef HAVE_SETXATTR
#include <sys/types.h>
#include <string.h>
#include <sys/xattr.h> /* include header from libc, not from libattr */
/* mapping table of curl metadata to extended attribute names */
static struct xattr_mapping {
char *attr; /* name of the xattr */
@ -35,3 +61,11 @@ int write_xattr( CURL *curl, const char *filename )
}
return err;
}
#else
int write_xattr(CURL *curl, const char *filename)
{
(void)curl;
(void)filename;
return 0;
}
#endif

25
src/xattr.h
View File

@ -1 +1,26 @@
#ifndef __XATTR_H
#define __XATTR_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 2010, 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 http://curl.haxx.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.
*
***************************************************************************/
int write_xattr( CURL *curl, const char *filename );
#endif