view auto/endianess @ 4477:7033faf6dc3c

Added disable_symlinks directive. To completely disable symlinks (disable_symlinks on) we use openat(O_NOFOLLOW) for each path component to avoid races. To allow symlinks with the same owner (disable_symlinks if_not_owner), use openat() (followed by fstat()) and fstatat(AT_SYMLINK_NOFOLLOW), and then compare uids between fstat() and fstatat(). As there is a race between openat() and fstatat() we don't know if openat() in fact opened symlink or not. Therefore, we have to compare uids even if fstatat() reports the opened component isn't a symlink (as we don't know whether it was symlink during openat() or not). Default value is off, i.e. symlinks are allowed.
author Andrey Belov <defan@nginx.com>
date Mon, 13 Feb 2012 16:29:04 +0000
parents d620f497c50f
children
line wrap: on
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


echo $ngx_n "checking for system endianess ...$ngx_c"
echo >> $NGX_ERR
echo "checking for system endianess" >> $NGX_ERR


cat << END > $NGX_AUTOTEST.c

int main() {
    int i = 0x11223344;
    char *p;

    p = (char *) &i;
    if (*p == 0x44) return 0;
    return 1;
}

END

ngx_test="$CC $CC_TEST_FLAGS $CC_AUX_FLAGS \
          -o $NGX_AUTOTEST $NGX_AUTOTEST.c $NGX_LD_OPT $ngx_feature_libs"

eval "$ngx_test >> $NGX_AUTOCONF_ERR 2>&1"

if [ -x $NGX_AUTOTEST ]; then
    if $NGX_AUTOTEST >/dev/null 2>&1; then
        echo " little endianess"
        have=NGX_HAVE_LITTLE_ENDIAN . auto/have
    else
        echo " big endianess"
    fi

    rm $NGX_AUTOTEST*

else
    rm $NGX_AUTOTEST*

    echo
    echo "$0: error: can not detect system endianess"
    exit 1
fi