Add bin and src/scripts directories

The bin directory exists as a target for build operations.
Its contents are various SO-related scripts that have semi-general use.
The source code for scripts is in the src/scripts directory.

bin/.gitignore

@@ -0,0 +1,5 @@
+# Ignore everything...
+*
+# Except the README.md and .gitignore files
+!README.md
+!.gitignore

bin/README.md

@@ -0,0 +1,12 @@
+# `bin` Directory
+
+Apart from the README.md file (and .gitignore file), this is a
+destination directory for binaries (compiled C programs, etc) and for
+the 'compiled' versions of shell scripts (or any other scripting
+language).
+There shouldn't be any source code in here.
+
+The source code for the scripts is in `src/scripts`; compilation copies
+the scripts (without the language-identifying suffix) to this directory.
+
+The directory content should be ignored except for the README.md file.

src/makefile

@@ -145,6 +145,7 @@ BUILD_DIRECTORIES = \
 	miscellany \
 	posix-regex \
 	primes \
+	scripts \
 	sortfile \
 	sorttest \
 	${SO_DIRECTORIES} \

src/scripts/.gitignore

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+posixcmd
+posixfun
+posixhdr
+so
+wso

src/scripts/README.md

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+### The `scripts` Directory
+
+This directory contains the version-controlled source of shell scripts
+(and any other scripting language).
+The files here have a language-specific suffix.
+
+The 'compilation' process creates a copy of the script without any
+suffix and moves it to the top-level `bin` directory, which can be added
+to `$PATH`.
+It is recommended that it is added at the end of the PATH, not the
+beginning.
+

src/scripts/makefile

@@ -0,0 +1,26 @@
+# Makefile for miscellany directory
+
+include ../../etc/soq-head.mk
+
+BINDIR  = ../../bin
+CPFLAGS = -pf
+
+PROG01 = posixcmd
+PROG02 = posixfun
+PROG03 = posixhdr
+PROG04 = wso
+PROG05 = so
+
+PROGRAMS = \
+	${PROG01} \
+	${PROG02} \
+	${PROG03} \
+	${PROG04} \
+	${PROG05} \
+
+all: ${PROGRAMS}
+
+install: all
+	${CP} ${CPFLAGS} ${PROGRAMS} ${BINDIR}
+
+include ../../etc/soq-tail.mk

src/scripts/posixcmd.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# Echo URLs for POSIX commands
+
+baseurl="http://pubs.opengroup.org/onlinepubs/9699919799"
+bq='`'
+
+for command in "$@"
+do
+    echo "[$bq$command$bq]($baseurl/utilities/$command.html)"
+done

src/scripts/posixfun.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+#
+# Echo URLs for POSIX functions
+
+baseurl="http://pubs.opengroup.org/onlinepubs/9699919799"
+bq='`'
+
+for function in "$@"
+do
+    echo "[$bq$function()$bq]($baseurl/functions/$function.html)"
+done

src/scripts/posixhdr.sh

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+#!/bin/sh
+#
+# Echo URLs for POSIX headers
+
+baseurl="http://pubs.opengroup.org/onlinepubs/9699919799"
+bq='`'
+
+for header in "$@"
+do
+    mapped="$(echo "$header" | sed 's%/%_%; s/[<>"]//g')"
+    echo "[$bq<$header>$bq]($baseurl/basedefs/$mapped.html)"
+done

src/scripts/so.sh

@@ -0,0 +1,5 @@
+#!/bin/sh
+#
+# Indent by four spaces for Stack Overflow
+
+exec sed '/./s/^/    /' "$@"

src/scripts/wso.sh

@@ -0,0 +1,16 @@
+#!/bin/sh
+#
+# Print standardized 'Welcome to Stack Overflow' comment with URLs.
+
+cat <<EOF
+Welcome to Stack Overflow.
+Please note that the preferred way of saying 'thanks' around here is by
+up-voting good questions and helpful answers (once you have enough
+reputation to do so), and by accepting the most helpful answer to any
+question you ask (which also gives you a small boost to your
+reputation).
+Please see the [About] page and also [How do I ask questions
+here?](http://stackoverflow.com/help/how-to-ask) and
+[What do I do when someone answers my
+question?](http://stackoverflow.com/help/someone-answers)
+EOF