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

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