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#
# set +o errexit -o noglob -o nounset is assumed.
#
rtl_check_prereqs() {
local _cmd="" _cmds_missing="" _rc=0; _status="";
for _cmd in "${@}"; do
if ! which "${_cmd}" >/dev/null 2>&1; then
_cmds_missing="${_cmds_missing:+${_cmds_missing} }${_cmd}";
fi;
done;
if [ -n "${_cmds_missing}" ]; then
_rc=1; _status="Error: missing prerequisite package(s): ${_cmds_missing}";
fi;
return "${_rc}";
};
rtl_clean_env() {
local _env_vars_except="${1}" _env_var="" _env_vars="";
_env_vars="$(export | sed -ne '/^export/{s/^export //;s/=.*$//p}')";
for _env_var in ${_env_vars}; do
if [ "${_env_var#DEFAULT_}" != "${_env_var}" ]\
|| [ "${_env_var#PKG_}" != "${_env_var}" ]; then
_env_vars_except="$(rtl_lconcat "${_env_vars_except}" "${_env_var}")";
fi;
done;
rtl_unset_vars $(rtl_lfilter "${_env_vars}" "${_env_vars_except}");
};
rtl_get_cpu_count() {
local _line="" _ncpus=0 _rc=0 _sname="$(uname -s 2>/dev/null)"; _status="";
case "${_sname}" in
Linux) if [ ! -e "/proc/cpuinfo" ]; then
_rc=1; _status="Error: /proc/cpuinfo non-existent.";
else while read -r _line; do
if rtl_match "${_line}" "processor*:"; then
: $((_ncpus+=1));
fi;
done < /proc/cpuinfo; printf "%s" "${_ncpus}";
fi; ;;
*) _rc=1; _status="Error: unknown platform \`${_sname}'."; ;;
esac; return "${_rc}";
};
rtl_get_var_unsafe() {
local _vname="";
if [ "x${1}" = "x-u" ]; then
shift; _vname="$(rtl_toupper "${1}")";
else
_vname="${1}";
fi;
eval echo \${${_vname}} 2>/dev/null;
};
rtl_get_vars_fast() {
local _pattern="${1}";
set | awk -F= '/'"${_pattern}"'/{print $1}' | sort;
};
rtl_kill_tree() {
local _pid="${1}" _signal="${2:-TERM}" _pid_child="" _pids="";
if _pids="$(pgrep -P "${_pid}")"\
&& [ -n "${_pids}" ]; then
for _pid_child in ${_pids}; do
rtl_kill_tree "${_pid_child}" "${_signal}";
done;
fi;
if [ "${_pid:-0}" -ne "${$}" ]\
&& kill "-${_signal}" "${_pid}" 2>/dev/null; then
RTL_KILL_TREE_PIDS="$(rtl_lconcat "${RTL_KILL_TREE_PIDS}" "${_pid}")";
fi;
};
rtl_prompt() {
local _fmt="${1}" _choice=""; shift;
printf "${_fmt}? (y|N) " "${@}";
read -r _choice;
case "${_choice}" in
[yY]) _choice=1; ;;
*) _choice=0; ;;
esac;
return "${_choice}";
};
rtl_rc() {
local _nflag="${1}" _cmd="${2}"; shift 2;
case "${_nflag}" in
1) if [ "${#}" -gt 0 ]; then
rtl_log_msg "verbose" "Command line: %s %s" "${_cmd}" "${*}";
else
rtl_log_msg "verbose" "Command line: %s" "${_cmd}";
fi; ;;
*) "${_cmd}" "${@}";
esac;
};
rtl_run_cmd_unsplit() {
local _cmd="${1}" _cmdline="" _rc="" IFS; shift;
while [ ${#} -gt 0 ]; do
[ -n "${1}" ] &&\
_cmdline="${_cmdline:+${_cmdline}:}${1}";
shift;
done;
IFS=:; ${_cmd} ${_cmdline}; _rc=$?;
return ${_rc};
};
rtl_set_vars() {
local _vars_set_vname="${1}" _vname_dst="${2}" _vname_src_tmpls="${3}" \
_vars_set_old="" _vars_set_tmp="" _vname_src="";
for _vname_src in $(rtl_toupper "${_vname_src_tmpls}"); do
_vname_src="${_vname_src}_${_vname_dst}";
eval _vval_src='${'"${_vname_src}"':-}';
if [ "${_vval_src:+1}" = 1 ]; then
eval PKG_${_vname_dst}='${_vval_src}';
_vars_set_tmp="${_vars_set_tmp:+${_vars_set_tmp} }PKG_${_vname_dst}";
fi;
done;
eval _vars_set_old='${'"${_vars_set_vname}"'}';
rtl_set_var_unsafe "${_vars_set_vname}" "${_vars_set_old:+${_vars_set_old} }${_vars_set_tmp}";
};
# vim:filetype=sh
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