Patch from vodz to fix the dynamic vars patch, which I should not

have checked in.  Vladimir writes:

Your patch have many problem.
1. You always added + time(). This cannot reset RANDOM=value for debuging
with
replay sequential.
2. Hmm. I examine bash 2.04 source. This pseudorandom generator use low bits
of
counter value. You use high bits. This make bad pseudorandom values after
have
0-value. For example, if + time() do remove, your generator always return 0
after
first generate 0.
3. Memory leak per call. Use ash-unlike unecessary bb_strdup function.
4. Unsupport show last $RANDOM value for "set" and "export" command.
5. Bloat code. Busybox-unlike patch - added unstandart feature as default
hardcode.

Last patch attached.

Erik, why you apply Paul patch with have 5-th point problem? :(

Last patch have ash change xwrite() to fresh libbb/bb_full_write interfase
(haved loop after EINTR).


--w
vodz


git-svn-id: svn://busybox.net/trunk/busybox@8632 69ca8d6d-28ef-0310-b511-8ec308f3f277

1 files changed, 11 insertions, 0 deletions

diff --git a/shell/Config.in b/shell/Config.in
index bcb5e719b..34baaa45c 100644
--- a/shell/Config.in
+++ b/shell/Config.in
@@ -97,6 +97,17 @@ config CONFIG_ASH_OPTIMIZE_FOR_SIZE
         help
           Compile ash for reduced size at price of speed.
 
+config CONFIG_ASH_RANDOM_SUPPORT
+        bool "  Enable pseudorandom generator and variable $RANDOM"
+        default n
+        depends on CONFIG_ASH
+        help
+          Enable pseudorandom generator and dynamic variable "$RANDOM".
+          Each read of "$RANDOM" will generate a new pseudorandom value.
+          You can reset the generator by using a specified start value.
+          After "unset RANDOM" then generator will switch off and this
+          variable will no longer have special treatment.
+
 config CONFIG_HUSH
         bool "hush"
         default n