mirror of https://github.com/python/cpython
Issue #22181: The availability of the getrandom() is now checked in configure,
and stored in pyconfig.h as the new HAVE_GETRANDOM_SYSCALL define. Fix os.urandom() tests using file descriptors if os.urandom() uses getrandom().
This commit is contained in:
Victor Stinner
parent
79d68f929d
commit
9eb57c5fa5
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@ -1199,9 +1199,12 @@ class URandomTests(unittest.TestCase):
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HAVE_GETENTROPY = (sysconfig.get_config_var('HAVE_GETENTROPY') == 1)
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HAVE_GETRANDOM = (sysconfig.get_config_var('HAVE_GETRANDOM_SYSCALL') == 1)
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@unittest.skipIf(HAVE_GETENTROPY,
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"getentropy() does not use a file descriptor")
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@unittest.skipIf(HAVE_GETRANDOM,
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"getrandom() does not use a file descriptor")
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class URandomFDTests(unittest.TestCase):
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@unittest.skipUnless(resource, "test requires the resource module")
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def test_urandom_failure(self):
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@ -6,11 +6,8 @@
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# ifdef HAVE_SYS_STAT_H
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# include <sys/stat.h>
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# endif
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# ifdef HAVE_SYS_SYSCALL_H
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# ifdef HAVE_GETRANDOM_SYSCALL
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# include <sys/syscall.h>
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# if defined(__linux__) && defined(SYS_getrandom)
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# define HAVE_GETRANDOM
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# endif
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# endif
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#endif
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@ -102,7 +99,7 @@ py_getentropy(unsigned char *buffer, Py_ssize_t size, int fatal)
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#else /* !HAVE_GETENTROPY */
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#ifdef HAVE_GETRANDOM
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#ifdef HAVE_GETRANDOM_SYSCALL
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static int
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py_getrandom(void *buffer, Py_ssize_t size, int raise)
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{
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@ -173,7 +170,7 @@ dev_urandom_noraise(unsigned char *buffer, Py_ssize_t size)
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if (fd < 0)
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Py_FatalError("Failed to open /dev/urandom");
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#ifdef HAVE_GETRANDOM
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#ifdef HAVE_GETRANDOM_SYSCALL
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if (py_getrandom(buffer, size, 0) == 1)
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return;
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/* getrandom() is not supported by the running kernel, fall back
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@ -205,14 +202,14 @@ dev_urandom_python(char *buffer, Py_ssize_t size)
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int fd;
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Py_ssize_t n;
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struct _Py_stat_struct st;
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#ifdef HAVE_GETRANDOM
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#ifdef HAVE_GETRANDOM_SYSCALL
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int res;
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#endif
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if (size <= 0)
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return 0;
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#ifdef HAVE_GETRANDOM
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#ifdef HAVE_GETRANDOM_SYSCALL
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res = py_getrandom(buffer, size, 1);
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if (res < 0)
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return -1;
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@ -650,9 +650,6 @@ USE_SIGNAL_MODULE
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TCLTK_LIBS
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TCLTK_INCLUDES
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LIBFFI_INCLUDEDIR
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PKG_CONFIG_LIBDIR
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PKG_CONFIG_PATH
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PKG_CONFIG
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SHLIBS
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CFLAGSFORSHARED
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LINKFORSHARED
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@ -832,10 +829,7 @@ CFLAGS
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LDFLAGS
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LIBS
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CPPFLAGS
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CPP
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PKG_CONFIG
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PKG_CONFIG_PATH
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PKG_CONFIG_LIBDIR'
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CPP'
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# Initialize some variables set by options.
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@ -1523,11 +1517,6 @@ Some influential environment variables:
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CPPFLAGS (Objective) C/C++ preprocessor flags, e.g. -I<include dir> if
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you have headers in a nonstandard directory <include dir>
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CPP C preprocessor
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PKG_CONFIG path to pkg-config utility
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PKG_CONFIG_PATH
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directories to add to pkg-config's search path
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PKG_CONFIG_LIBDIR
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path overriding pkg-config's built-in search path
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Use these variables to override the choices made by `configure' or to help
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it to find libraries and programs with nonstandard names/locations.
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@ -9434,126 +9423,7 @@ $as_echo "no" >&6; }
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fi
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if test "x$ac_cv_env_PKG_CONFIG_set" != "xset"; then
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if test -n "$ac_tool_prefix"; then
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# Extract the first word of "${ac_tool_prefix}pkg-config", so it can be a program name with args.
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set dummy ${ac_tool_prefix}pkg-config; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_path_PKG_CONFIG+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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case $PKG_CONFIG in
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[\\/]* | ?:[\\/]*)
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ac_cv_path_PKG_CONFIG="$PKG_CONFIG" # Let the user override the test with a path.
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;;
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*)
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_path_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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;;
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esac
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fi
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PKG_CONFIG=$ac_cv_path_PKG_CONFIG
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if test -n "$PKG_CONFIG"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $PKG_CONFIG" >&5
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$as_echo "$PKG_CONFIG" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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fi
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if test -z "$ac_cv_path_PKG_CONFIG"; then
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ac_pt_PKG_CONFIG=$PKG_CONFIG
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# Extract the first word of "pkg-config", so it can be a program name with args.
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set dummy pkg-config; ac_word=$2
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
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$as_echo_n "checking for $ac_word... " >&6; }
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if ${ac_cv_path_ac_pt_PKG_CONFIG+:} false; then :
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$as_echo_n "(cached) " >&6
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else
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case $ac_pt_PKG_CONFIG in
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[\\/]* | ?:[\\/]*)
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ac_cv_path_ac_pt_PKG_CONFIG="$ac_pt_PKG_CONFIG" # Let the user override the test with a path.
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;;
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*)
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as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for as_dir in $PATH
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do
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IFS=$as_save_IFS
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test -z "$as_dir" && as_dir=.
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for ac_exec_ext in '' $ac_executable_extensions; do
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if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
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ac_cv_path_ac_pt_PKG_CONFIG="$as_dir/$ac_word$ac_exec_ext"
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$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
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break 2
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fi
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done
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done
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IFS=$as_save_IFS
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;;
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esac
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fi
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ac_pt_PKG_CONFIG=$ac_cv_path_ac_pt_PKG_CONFIG
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if test -n "$ac_pt_PKG_CONFIG"; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_pt_PKG_CONFIG" >&5
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$as_echo "$ac_pt_PKG_CONFIG" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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fi
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if test "x$ac_pt_PKG_CONFIG" = x; then
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PKG_CONFIG=""
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else
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case $cross_compiling:$ac_tool_warned in
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yes:)
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{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
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$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
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ac_tool_warned=yes ;;
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esac
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PKG_CONFIG=$ac_pt_PKG_CONFIG
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fi
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else
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PKG_CONFIG="$ac_cv_path_PKG_CONFIG"
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fi
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fi
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if test -n "$PKG_CONFIG"; then
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_pkg_min_version=0.9.0
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking pkg-config is at least version $_pkg_min_version" >&5
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$as_echo_n "checking pkg-config is at least version $_pkg_min_version... " >&6; }
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if $PKG_CONFIG --atleast-pkgconfig-version $_pkg_min_version; then
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
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$as_echo "yes" >&6; }
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else
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
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$as_echo "no" >&6; }
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PKG_CONFIG=""
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fi
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fi
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PKG_PROG_PKG_CONFIG
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# Check for use of the system expat library
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for --with-system-expat" >&5
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@ -15838,6 +15708,42 @@ $as_echo "#define HAVE_DIRENT_D_TYPE 1" >>confdefs.h
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fi
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# check if the Linux getrandom() syscall is available
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{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for the Linux getrandom() syscall" >&5
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$as_echo_n "checking for the Linux getrandom() syscall... " >&6; }
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cat confdefs.h - <<_ACEOF >conftest.$ac_ext
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/* end confdefs.h. */
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#include <sys/syscall.h>
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int main() {
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const int flags = 0;
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char buffer[1];
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int n;
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/* ignore the result, Python checks for ENOSYS at runtime */
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(void)syscall(SYS_getrandom, buffer, sizeof(buffer), flags);
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return 0;
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}
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_ACEOF
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if ac_fn_c_try_link "$LINENO"; then :
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have_getrandom_syscall=yes
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else
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have_getrandom_syscall=no
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fi
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rm -f core conftest.err conftest.$ac_objext \
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conftest$ac_exeext conftest.$ac_ext
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{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_getrandom_syscall" >&5
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$as_echo "$have_getrandom_syscall" >&6; }
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if test "$have_getrandom_syscall" = yes; then
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$as_echo "#define HAVE_GETRANDOM_SYSCALL 1" >>confdefs.h
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fi
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# generate output files
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ac_config_files="$ac_config_files Makefile.pre Modules/Setup.config Misc/python.pc Misc/python-config.sh"
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24
configure.ac
24
configure.ac
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@ -4972,6 +4972,30 @@ if test "$have_dirent_d_type" = yes; then
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[Define to 1 if the dirent structure has a d_type field])
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fi
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# check if the Linux getrandom() syscall is available
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AC_MSG_CHECKING(for the Linux getrandom() syscall)
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AC_LINK_IFELSE(
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[
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AC_LANG_SOURCE([[
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#include <sys/syscall.h>
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int main() {
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const int flags = 0;
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char buffer[1];
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int n;
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/* ignore the result, Python checks for ENOSYS at runtime */
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(void)syscall(SYS_getrandom, buffer, sizeof(buffer), flags);
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return 0;
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}
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]])
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],[have_getrandom_syscall=yes],[have_getrandom_syscall=no])
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AC_MSG_RESULT($have_getrandom_syscall)
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if test "$have_getrandom_syscall" = yes; then
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AC_DEFINE(HAVE_GETRANDOM_SYSCALL, 1,
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[Define to 1 if the Linux getrandom() syscall is available])
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fi
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# generate output files
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AC_CONFIG_FILES(Makefile.pre Modules/Setup.config Misc/python.pc Misc/python-config.sh)
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AC_CONFIG_FILES([Modules/ld_so_aix], [chmod +x Modules/ld_so_aix])
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@ -395,6 +395,9 @@
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/* Define to 1 if you have the `getpwent' function. */
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#undef HAVE_GETPWENT
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/* Define to 1 if the Linux getrandom() syscall is available */
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#undef HAVE_GETRANDOM_SYSCALL
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/* Define to 1 if you have the `getresgid' function. */
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#undef HAVE_GETRESGID
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