Add 2006/birken/try.sh, bugs.md, format/typo check

The try.sh runs the program on all the tofu input files, prompting the
user to press a key before running each one so they have time to look at
the output of the previous one.

The README.md file format and typo checked.

This should complete 2006/birken except that it uses gets(), not
fgets(), which has been added to the bugs.md file. I almost got it to
work but it crashes with computer.tofu so I did not change it. Will look
at this later, maybe, but the bugs.md has a diff of the single change
that almost works. I did not have the time to write where it fails but I
do happen to know at least the end result.

2006/birken/README.md

@@ -5,6 +5,17 @@ make
 ```
 
 
+### Bugs and (Mis)features:
+
+The current status of this entry is:
+
+```
+STATUS: uses gets() - change to fgets() if possible
+```
+
+For more detailed information see [2006 birken in bugs.md](/bugs.md#2006-birken).
+
+
 ## To use:
 
 ```sh
@@ -15,10 +26,7 @@ make
 ### Try:
 
 ```sh
-./birken < counter.tofu
-./birken < adder.tofu
-./birken < buffer.tofu
-./birken < computer.tofu
+./try.sh
 ```
 
 etc.
@@ -30,22 +38,22 @@ Q: EDAMAME?
 
 A: Electronic Design Automation - Mechanical Abstract Machine Emulator
 
-What is TUFO?  It's not a veggy friendly food, nor it is Verilog or
-VHDL.  It is not even Pascal!
+What is TOFU?  It's not a veggie friendly food, nor it is
+[Verilog](https://en.wikipedia.org/wiki/Verilog) or
+[VHDL](https://en.wikipedia.org/wiki/VHDL)  It is not even
+[Pascal](https://en.wikipedia.org/wiki/Pascal_(programming_language))!
 
-NOTE: On some systems, file(1) claims one of the .tofu files is Pascal
+NOTE: On some systems, `file(1)` claims one of the `.tofu` files is Pascal
 source. :-)
 
 It may not be the most readable hardware description language, but it is
-one of the easiest 55 page long manual to learn.  :-)
+one of the easiest 55 page long manuals to learn.  :-)
 
 For a small but non-trivial design, try implementing a
 [Linear Feedback Shift Register](http://en.wikipedia.org/wiki/LFSR)
 
-And for those who are still confused:
-
-> <http://en.wikipedia.org/wiki/Edamame>
-> <http://en.wikipedia.org/wiki/Tofu>
+And for those who are still confused, see <http://en.wikipedia.org/wiki/Edamame>
+and <http://en.wikipedia.org/wiki/Tofu>.
 
 
 ## Author's remarks:
@@ -64,7 +72,7 @@ The primary obfuscation is the data structure chosen for parsing the
 input file and for executing the simulation.  Oh man...  coding that
 data structure gave me such a bad headache.  But, I figure, who needs
 more than a pair anyway?  Subtle obfuscations abound.  Bonus points go
-out the one who discovers the hidden program within the source.
+out to the one who discovers the hidden program within the source.
 
 Note that the shape of the source is a wave, not a waveform.
 

2006/birken/try.sh

@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2006/birken
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+read -r -n 1 -p "Press any key to run: ./birken < adder.tofu 2>/dev/null: "
+./birken < adder.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < buffer.tofu 2>/dev/null: "
+./birken < buffer.tofu 2>/dev/null
+echo 1>&2
+
+echo "NOTE: the next one has longer output." 1>&2
+read -r -n 1 -p "Press any key to run: ./birken < computer.tofu 2>/dev/null: "
+./birken < computer.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < counter.tofu 2>/dev/null: "
+./birken < counter.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < divider.tofu 2>/dev/null: "
+./birken < divider.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < lfsr.tofu 2>/dev/null: "
+./birken < lfsr.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < memory.tofu 2>/dev/null: "
+./birken < memory.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < multiplier.tofu 2>/dev/null: "
+./birken < multiplier.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < multiplier2.tofu 2>/dev/null: "
+./birken < multiplier2.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < oneline.tofu 2>/dev/null: "
+./birken < oneline.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < shift.tofu 2>/dev/null: "
+./birken < shift.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < zuse.tofu 2>/dev/null: "
+./birken < zuse.tofu 2>/dev/null
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./birken < zuse2.tofu 2>/dev/null: "
+./birken < zuse2.tofu 2>/dev/null

bugs.md

@@ -2305,6 +2305,23 @@ used decimal mode, or any of the "undocumented" instructions.
 # 2006
 
 
+## 2006 birken
+
+### STATUS: uses gets() - change to fgets() if possible
+### Source code: [2006/birken/birken.c](2006/birken/birken.c)
+### Information: [2006/birken/README.md](2006/birken/README.md)
+
+This entry uses `gets(3)` which is unsafe and provides annoying warnings, most
+obnoxious in macOS as it shows it at runtime (redirecting `stderr` to
+`/dev/null` will silence it). The following diff will almost work but it crashes
+with at least `computer.tofu` input file:
+
+```diff
+12a13
+#define gets(c) fgets((c),PI,stdin)&&(((c)[strlen((c))-1]='\0'),c!=NULL)
+```
+
+
 ## 2006 borsanyi
 
 ### STATUS: INABIAF - please **DO NOT** fix

thanks-for-fixes.md

@@ -2952,6 +2952,8 @@ it.
 Cody fixed a segfault in macOS with this entry. The problem was a missing `+1`
 for strlen() with malloc(). This prevented it from working.
 
+Cody also added the [try.sh](2006/birken/try.sh) script.
+
 
 ## [2006/borsanyi](2006/borsanyi/borsanyi.c) ([README.md](2006/borsanyi/README.md]))