system/s6: Added (process/service supervision suite).

Signed-off-by: Willy Sudiarto Raharjo <willysr@slackbuilds.org>

system/s6/README

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+s6 is a small suite of programs for UNIX, designed to allow process
+supervision (a.k.a service supervision), in the line of daemontools
+and runit, as well as various operations on processes and daemons. It
+is meant to be a toolbox for low-level process and service
+administration, providing different sets of independent tools that can
+be used within or without the framework, and that can be assembled
+together to achieve powerful functionality with a very small amount of
+code.
+
+skalibs is only required at build time, not run time.
+
+
+Some hints for using this package on Slackware:
+
+I added the following to my /etc/inittab:
+
+# S6
+sv:12345:respawn:/command/s6-svscanboot 
+
+Then did a 'telinit q' to start it.
+
+Note that the default s6-svscanboot provided disables polling
+(-t0). So after adding a new service to /service you should call:
+
+/command/s6-svscanctl -a /service

system/s6/s6.SlackBuild

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+#!/bin/sh
+
+# Slackware build script for s6
+
+# Copyright 2019 Sean MacLennan Ottawa, Canada
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+PRGNAM=s6
+VERSION=${VERSION:-2.7.2.2}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+    *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+CWD=$(pwd)
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $PRGNAM-$VERSION
+tar xvf $CWD/$PRGNAM-$VERSION.tar.gz
+cd $PRGNAM-$VERSION
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+CFLAGS="$SLKCFLAGS" \
+CXXFLAGS="$SLKCFLAGS" \
+./configure \
+      --bindir=/command \
+      --libdir=/usr/lib${LIBDIRSUFFIX} \
+      --dynlibdir=/usr/lib${LIBDIRSUFFIX} \
+      --build=$ARCH-slackware-linux
+
+make
+make install DESTDIR=$PKG
+
+# Promote s6-svscanboot to /command since most Slackware users will
+# probably want to run without replacing init
+install examples/s6-svscanboot $PKG/command
+
+# Make this directory so that removepkg will show it as not empty
+mkdir $PKG/service
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a AUTHORS COPYING INSTALL NEWS README doc examples $PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}

system/s6/s6.info

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+PRGNAM="s6"
+VERSION="2.7.2.2"
+HOMEPAGE="https://skarnet.org/software/s6/"
+DOWNLOAD="https://skarnet.org/software/s6/s6-2.7.2.2.tar.gz"
+MD5SUM="49d7d214c41cc49b839834a518f21ca5"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="execline"
+MAINTAINER="Sean MacLennan"
+EMAIL="seanm@seanm.ca"

system/s6/slack-desc

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+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+  |-----handy-ruler------------------------------------------------------|
+s6: s6 (process/service supervision suite)
+s6:
+s6: s6 is a small suite of programs for UNIX, designed to allow process
+s6: supervision (a.k.a service supervision), in the line of daemontools
+s6: and runit, as well as various operations on processes and daemons.
+s6: It is meant to be a toolbox for low-level process and service
+s6: administration, providing different sets of independent tools that
+s6: can be used within or without the framework.
+s6:
+s6: https://skarnet.org/software/s6/
+s6: