David Learns Programming

functions.sh

# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
# All rights reserved. Released under the 2-clause BSD license.
 
# Allow any sh script to work with einfo functions and friends
# We also provide a few helpful functions for other programs to use
 
RC_GOT_FUNCTIONS="yes"
 
eindent()
{
	EINFO_INDENT=$((${EINFO_INDENT:-0} + 2))
	[ "$EINFO_INDENT" -gt 40 ] && EINFO_INDENT=40
	export EINFO_INDENT
}
 
eoutdent()
{
	EINFO_INDENT=$((${EINFO_INDENT:-0} - 2))
	[ "$EINFO_INDENT" -lt 0 ] && EINFO_INDENT=0
	return 0
}
 
yesno()
{
	[ -z "$1" ] && return 1
 
	case "$1" in
		[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1) return 0;;
		[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0) return 1;;
	esac
 
	local value=
	eval value=\$${1}
	case "$value" in
		[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1) return 0;;
		[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0) return 1;;
		*) vewarn "\$$1 is not set properly"; return 1;;
	esac
}
 
rc_runlevel() {
    rc-status --runlevel
}
 
_sanitize_path()
{
	local IFS=":" p= path=
	for p in $PATH; do
		case "$p" in
			/lib64/rc/bin|/lib64/rc/sbin);;
			/bin|/sbin|/usr/bin|/usr/sbin);;
			/bin|/sbin);;
			/usr/local/bin|/usr/local/sbin);;
			*) path="$path${path:+:}$p";;
		esac
	done
	echo "$path"
}
 
# Allow our scripts to support zsh
if [ -n "$ZSH_VERSION" ]; then
	emulate sh
	NULLCMD=:
	alias -g '${1+"$@"}'='"$@"'
	setopt NO_GLOB_SUBST
fi
 
# Make a sane PATH
_PREFIX=
_PKG_PREFIX=
_LOCAL_PREFIX=/usr/local
_LOCAL_PREFIX=${_LOCAL_PREFIX:-/usr/local}
_PATH=/lib64/rc/bin
case "$_PREFIX" in
	"$_PKG_PREFIX"|"$_LOCAL_PREFIX") ;;
	*) _PATH="$_PATH:$_PREFIX/bin:$_PREFIX/sbin";;
esac
_PATH="$_PATH":/bin:/sbin:/usr/bin:/usr/sbin
 
if [ -n "$_PKG_PREFIX" ]; then
	_PATH="$_PATH:$_PKG_PREFIX/bin:$_PKG_PREFIX/sbin"
fi
if [ -n "$_LOCAL_PREFIX" ]; then
	_PATH="$_PATH:$_LOCAL_PREFIX/bin:$_LOCAL_PREFIX/sbin"
fi
_path="$(_sanitize_path "$PATH")"
export PATH="$_PATH${_path:+:}$_path"
unset _sanitize_path _PREFIX _PKG_PREFIX _LOCAL_PREFIX _PATH _path
 
for arg; do
	case "$arg" in
		--nocolor|--nocolour|-C)
			export EINFO_COLOR="NO"
			;;
	esac
done
 
if [ -t 1 ] && yesno "${EINFO_COLOR:-YES}"; then
	if [ -z "$GOOD" ]; then
		eval $(eval_ecolors)
	fi
else
	# We need to have shell stub functions so our init scripts can remember
	# the last ecmd
	for _e in ebegin eend error errorn einfo einfon ewarn ewarnn ewend \
		vebegin veend veinfo vewarn vewend; do
		eval "$_e() { local _r; /lib64/rc/bin/$_e \"\$@\"; _r=$?; \
		export EINFO_LASTCMD=$_e; return \$_r; }"
	done
	unset _e
fi