- Update to the Improve bash $RANDOM pseudo RNG (bug #234906) now works

with subshells and make $RANDOM on demand thus reducing the amount of
    AVCs thrown.
This commit is contained in:
Pete Graner 2007-08-20 18:41:29 +00:00
parent a2a31879cb
commit eeaaae09ac
2 changed files with 61 additions and 46 deletions

View File

@ -1,6 +1,30 @@
--- bash-3.2/configure.in.rng 2007-04-05 11:07:40.000000000 +0200
+++ bash-3.2/configure.in 2007-04-05 11:07:41.000000000 +0200
@@ -111,6 +111,7 @@
diff -up bash-3.2/config.h.in.rng.patch bash-3.2/config.h.in
--- bash-3.2/config.h.in.rng.patch 2007-08-20 13:42:49.000000000 +0200
+++ bash-3.2/config.h.in 2007-08-20 13:42:49.000000000 +0200
@@ -203,6 +203,8 @@
#define DEFAULT_MAIL_DIRECTORY "/var/spool/mail"
+#undef PATH_RANDOMDEV
+
/* Characteristics of the system's header files and libraries that affect
the compilation environment. */
@@ -817,6 +819,10 @@
/* Define if you have the wcwidth function. */
#undef HAVE_WCWIDTH
+#undef HAVE_RANDOM
+
+#undef HAVE_SRANDOM
+
/* Presence of certain system include files. */
/* Define if you have the <arpa/inet.h> header file. */
diff -up bash-3.2/configure.in.rng.patch bash-3.2/configure.in
--- bash-3.2/configure.in.rng.patch 2007-08-20 13:42:49.000000000 +0200
+++ bash-3.2/configure.in 2007-08-20 13:42:49.000000000 +0200
@@ -111,6 +111,7 @@ AC_ARG_WITH(gnu-malloc, AC_HELP_STRING([
AC_ARG_WITH(installed-readline, AC_HELP_STRING([--with-installed-readline], [use a version of the readline library that is already installed]), opt_with_installed_readline=$withval)
AC_ARG_WITH(purecov, AC_HELP_STRING([--with-purecov], [configure to postprocess with pure coverage]), opt_purecov=$withval)
AC_ARG_WITH(purify, AC_HELP_STRING([--with-purify], [configure to postprocess with purify]), opt_purify=$withval)
@ -8,7 +32,7 @@
if test "$opt_bash_malloc" = yes; then
MALLOC_TARGET=malloc
@@ -152,6 +153,15 @@
@@ -152,6 +153,15 @@ if test -z "${DEBUGGER_START_FILE}"; the
DEBUGGER_START_FILE=${ac_default_prefix}/share/bashdb/bashdb-main.inc
fi
@ -24,7 +48,7 @@
dnl optional shell features in config.h.in
opt_minimal_config=no
@@ -708,6 +718,8 @@
@@ -708,6 +718,8 @@ AC_CHECK_FUNCS(bcopy bzero confstr fnmat
setenv setlinebuf setlocale setvbuf siginterrupt strchr \
sysconf tcgetattr times ttyname tzset unsetenv)
@ -33,30 +57,9 @@
AC_CHECK_FUNCS(vsnprintf snprintf vasprintf asprintf)
AC_CHECK_FUNCS(isascii isblank isgraph isprint isspace isxdigit)
AC_CHECK_FUNCS(getpwent getpwnam getpwuid)
--- bash-3.2/config.h.in.rng 2007-04-05 11:07:40.000000000 +0200
+++ bash-3.2/config.h.in 2007-04-05 11:07:41.000000000 +0200
@@ -203,6 +203,8 @@
#define DEFAULT_MAIL_DIRECTORY "/var/spool/mail"
+#undef PATH_RANDOMDEV
+
/* Characteristics of the system's header files and libraries that affect
the compilation environment. */
@@ -815,6 +817,10 @@
/* Define if you have the wcwidth function. */
#undef HAVE_WCWIDTH
+#undef HAVE_RANDOM
+
+#undef HAVE_SRANDOM
+
/* Presence of certain system include files. */
/* Define if you have the <arpa/inet.h> header file. */
--- bash-3.2/variables.c.rng 2006-09-08 19:33:32.000000000 +0200
+++ bash-3.2/variables.c 2007-04-05 11:53:03.000000000 +0200
diff -up bash-3.2/variables.c.rng.patch bash-3.2/variables.c
--- bash-3.2/variables.c.rng.patch 2006-09-08 19:33:32.000000000 +0200
+++ bash-3.2/variables.c 2007-08-20 16:16:56.000000000 +0200
@@ -42,6 +42,11 @@
#include "bashansi.h"
#include "bashintl.h"
@ -69,7 +72,7 @@
#include "shell.h"
#include "flags.h"
#include "execute_cmd.h"
@@ -182,7 +187,8 @@
@@ -182,7 +187,8 @@ static SHELL_VAR *get_seconds __P((SHELL
static SHELL_VAR *init_seconds_var __P((void));
static int brand __P((void));
@ -79,16 +82,17 @@
static SHELL_VAR *assign_random __P((SHELL_VAR *, char *, arrayind_t));
static SHELL_VAR *get_random __P((SHELL_VAR *));
@@ -495,7 +501,7 @@
@@ -494,9 +500,6 @@ initialize_shell_variables (env, privmod
}
#endif /* HISTORY */
/* Seed the random number generator. */
- /* Seed the random number generator. */
- sbrand (dollar_dollar_pid + shell_start_time);
+ seed_random();
-
/* Handle some "special" variables that we may have inherited from a
parent shell. */
@@ -1143,7 +1149,9 @@
if (interactive_shell)
@@ -1143,9 +1146,11 @@ init_seconds_var ()
}
/* The random number seed. You can change this by setting RANDOM. */
@ -96,9 +100,12 @@
static unsigned long rseed = 1;
+#endif
static int last_random_value;
static int seeded_subshell = 0;
-static int seeded_subshell = 0;
+static int seeded_subshell = -1;
@@ -1155,26 +1163,56 @@
/* A linear congruential random number generator based on the example
one in the ANSI C standard. This one isn't very good, but a more
@@ -1155,28 +1160,58 @@ static int seeded_subshell = 0;
static int
brand ()
{
@ -110,7 +117,7 @@
+#endif
return ((unsigned int)((rseed >> 16) & 32767)); /* was % 32768 */
}
-
/* Set the random number generator seed to SEED. */
static void
sbrand (seed)
@ -154,16 +161,24 @@
arrayind_t unused;
{
- sbrand (strtoul (value, (char **)NULL, 10));
- if (subshell_environment)
- seeded_subshell = 1;
+ sbrand ((unsigned int)strtoul (value, (char **)NULL, 10));
if (subshell_environment)
seeded_subshell = 1;
+ seeded_subshell = subshell_level;
return (self);
@@ -1188,7 +1226,7 @@
/* Reset for command and process substitution. */
if (subshell_environment && seeded_subshell == 0)
{
- sbrand (rseed + getpid() + NOW);
+ seed_random ();
seeded_subshell = 1;
}
@@ -1186,10 +1221,10 @@ get_random_number ()
int rv;
/* Reset for command and process substitution. */
- if (subshell_environment && seeded_subshell == 0)
+ if (seeded_subshell < subshell_level)
{
- sbrand (rseed + getpid() + NOW);
- seeded_subshell = 1;
+ seed_random ();
+ seeded_subshell = subshell_level;
}
do

View File

@ -1,7 +1,7 @@
Version: 3.2
Name: bash
Summary: The GNU Bourne Again shell (bash) version %{version}
Release: 14%{?dist}
Release: 15%{?dist}
Group: System Environment/Shells
License: GPLv2+
Url: http://www.gnu.org/software/bash
@ -240,12 +240,12 @@ fi
%doc doc/*.ps doc/*.0 doc/*.html doc/article.txt
%changelog
* Mon Aug 20 2007 Pete Graner <pgraner@redhat.com> - 3.2-14
* Mon Aug 20 2007 Pete Graner <pgraner@redhat.com> - 3.2-15
- Update to the Improve bash $RANDOM pseudo RNG (bug #234906)
now works with subshells and make $RANDOM on demand thus reducing the
amount of AVCs thrown.
* Thu Aug 16 2007 Pete Graner <pgraner@redhat.com> - 3.2-14
* Thu Aug 16 2007 Pete Graner <pgraner@redhat.com> - 3.2-15
- Changed spec file License to GPLv2+
* Wed Aug 15 2007 Pete Graner <pgraner@redhat.com> - 3.2-13