From b5c2e7709dfdf8a082f6caafe9a016a8ccaabaf8 Mon Sep 17 00:00:00 2001
From: Liam Waldron <liamwaldron@everestlinux.org>
Date: Fri, 24 Mar 2023 13:28:43 -0400
Subject: [PATCH] init

---
 README.md        |  35 +++++++++++++++
 src/bin/esv      | 111 +++++++++++++++++++++++++++++++++++++++++++++++
 src/etc/esv.conf |  13 ++++++
 src/man/esv.1    |  30 +++++++++++++
 4 files changed, 189 insertions(+)
 create mode 100644 README.md
 create mode 100755 src/bin/esv
 create mode 100755 src/etc/esv.conf
 create mode 100644 src/man/esv.1

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..92d746d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,35 @@
+## esv
+
+esv is a simple service manager, compatible with sysv init scripts. It is intended to interface well wtith
+busybox init, however it also works well with sysvinit.
+
+## Get started
+
+esv requires the following packages:
+
+- Bash (esv runtime)
+
+To install esv, clone the everest-tools repository:
+```
+git clone https://git.everestlinux.org/EverestLinux/everest-tools
+```
+Inside `src/esv/esv3`, edit install.conf.dist and ensure all options are adequate, and save as install.conf:
+```
+EDITOR=your_editor_here
+$EDITOR install.conf.dist
+```
+Run `build.sh` as root:
+```
+doas ./build.sh install
+# OR
+sudo ./build.sh install
+# OR
+su -c ./build.sh install
+```
+
+## Usage
+```
+esv {start,stop,restart} SERVICE_NAME # start a service
+esv {-h,--help}	# show a help message
+esv {-v,--version} # show the version
+```
diff --git a/src/bin/esv b/src/bin/esv
new file mode 100755
index 0000000..6d698ac
--- /dev/null
+++ b/src/bin/esv
@@ -0,0 +1,111 @@
+#!/bin/sh
+# esv - Everest Service Manager
+
+if [ ! -f "/etc/esv.conf" ]; then
+	printf "error: unable to parse /etc/esv.conf, does it exist?\n"
+	exit 1
+fi
+
+source /etc/esv.conf
+
+helpmsg_big() {
+	printf "${0} - Everest Service Manager\n"
+	printf "usage: ${0} [start] [stop] [restart] [-h] [-v] SERVICE NAME\n"
+	printf "\n"
+	printf "${0} {start}		start a service\n"
+	printf "${0} {stop}		stop a service\n"
+	printf "${0} {restart}		restart a running service\n"
+	printf "${0} {-h/--help}	print this message and exit\n"
+	printf "${0} {-v/--version}	print the version and exit\n"
+	printf "\n"
+	printf "This program is free software.\n"
+	printf "See the GNU GPL version 3 for details.\n"
+}
+
+helpmsg_small() {
+	printf "usage: ${0} [start] [stop] [restart] [-h] [-v] SERVICE NAME\n"
+}
+
+check_if_exists() {
+	SV="${@}"
+	for SRV in ${SV[@]}; do
+		if [ ! -f "${SRV_DIR}/${SRV}" ]; then
+			printf "${red}service ${SRV} does not exist${reset}\n"
+			exit 1
+		fi
+	done
+}
+
+startsv() {
+	SV="${@}"
+	if [ "$SV" = "" ]; then
+		printf "${red}you must specify a service name${reset}\n"
+		exit 1
+	fi
+
+	printf "${blue}starting: $SV...${reset}\n"
+		for SRV in ${SV[@]}; do
+			source ${SRV_DIR}/${SRV}
+			run
+		done
+}
+
+stopsv() {
+	SV="${@}"
+	if [ "$SV" = "" ]; then
+		printf "${red}you must specify a service name${reset}\n"
+		exit 1
+	fi
+
+	printf "${blue}stopping: $SV...${reset}\n"
+		for SRV in ${SV[@]}; do
+			source ${SRV_DIR}/${SRV}
+			stop
+		done
+}
+
+restartsv() {
+	SV="${@}"
+	if [ "$V" = "" ]; then
+		printf "${red}you must specify a service name${reset}\n"
+		exit 1
+	fi
+
+	printf "${blue} restarting: $SV...${reset}\n"
+		for SRV in ${SV[@]}; do
+			source ${SRV_DIR}/${SRV}
+			restart
+		done
+}
+
+printver() {
+	printf "${blue}esv v3.0.0${reset}\n"
+}
+
+case $1 in
+	-h|--help)
+		helpmsg_big
+		exit 0
+	;;
+	-v|--version)
+		printver
+		exit 0
+	;;
+	start)
+		shift
+		check_if_exists "$@"
+		startsv "$@"
+	;;
+	stop)
+		shift
+		check_if_exists "$@"
+		stopsv "$@"
+	;;
+	restart)
+		shift
+		check_if_exists "$@"
+		restartsv "$@"
+	;;
+	*)
+		helpmsg_small "$@"
+esac
diff --git a/src/etc/esv.conf b/src/etc/esv.conf
new file mode 100755
index 0000000..f8f095f
--- /dev/null
+++ b/src/etc/esv.conf
@@ -0,0 +1,13 @@
+# /etc/esv.conf
+
+# Where services are stored.
+# On Everest, this is /etc/init.d
+export SRV_DIR="/etc/init.d"
+
+# Colors
+export red="\033[1;31m"
+export green="\033[1;32m"
+export blue="\033[1;34m"
+export reset="\033[m"
+
+# end /etc/esv.conf
diff --git a/src/man/esv.1 b/src/man/esv.1
new file mode 100644
index 0000000..779da39
--- /dev/null
+++ b/src/man/esv.1
@@ -0,0 +1,30 @@
+.\" Manpage for esv.
+.TH man 1 "24 March 2023" "3.0" "Everest Linux Manual"
+.SH NAME
+esv \- start, stop, and restart services from sysv-style init scripts
+.SH SYNPOSIS
+esv [start] [stop] [restart] [-h] [-v]
+.SH DESCRIPTION
+esv is a service manager for Everest Linux which interfaces with already-existing sysv-style init scripts. It is written in POSIX sh, and as such interfaces well with these scripts.
+.SH OPTIONS
+.TP
+.BR start
+starts a daemon
+.TP
+.BR stop
+stops a daemon
+.TP
+.BR restart
+restarts a daemon
+.TP
+.BR \-h
+shows a help message
+.TP
+.BR \-v
+shows the version
+.SH SEE ALSO
+ecrypt(1) gpkg(8)
+.SH BUGS
+Report all bugs on the issues page at https://git.everestlinux.org/EverestLinux/esv
+.SH AUTHOR
+Liam Waldron (liamwaldron@everestlinux.org)