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#
# set +o errexit -o noglob -o nounset is assumed.
#
rtl_check_path_vars() {
local _vnames="${1}" _rc=0 _vname="" _vname_val=""; _status="";
for _vname in ${_vnames}; do
_vname_val="$(rtl_get_var_unsafe "${_vname}")";
if [ -z "${_vname_val}" ]; then
_rc=1; _status="Error: variable \`${_vname}' is empty or unset."; break;
elif [ "${_vname_val#* *}" != "${_vname_val}" ]; then
_rc=2; _status="Error: variable \`${_vname}' contains one or more whitespace characters."; break;
fi;
done;
return "${_rc}";
};
rtl_check_prereqs() {
local _cmd="" _cmds_missing="" _rc=0; _status="";
for _cmd in "${@}"; 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}" "${_env_vars_except}");
};
rtl_dirname() {
local _dname="${1%/*}";
while rtl_matchr "${_dname}" "*/"; do
_dname="${_dname%/}";
done; printf "%s" "${_dname:-/}";
};
rtl_exists_any() {
local _subdir="${1}"; shift;
while [ "${#}" -gt 0 ]; do
if [ -e "${_subdir}/${1}" ]; then
return 0;
else
shift;
fi;
done; return 1;
};
rtl_export_vars() {
local _unsetfl=0; [ "x${1}" = "x-u" ] && { _unsetfl=1; shift; };
while [ "${#}" -ge 2 ]; do
if [ -n "${2}" ]; then
if [ "${_unsetfl:-0}" -eq 0 ]; then
rtl_set_var_unsafe "${1}" "${2}"; export "${1}";
else
unset "${1}";
fi;
fi;
shift 2;
done;
};
rtl_filter_vars() {
local _fn="${1}" _fnfl=0 _qchar="" _var_spec="" _vars="" _vname="" IFS="
"; for _var_spec in $(set); do
case "${_qchar}" in
"\"") if [ "${_var_spec%\"}" != "${_var_spec}" ]; then
_qchar="";
fi;
if [ "${_fnfl:-0}" -eq 1 ]; then
_vars="$(rtl_lconcat "${_vars}" "${_var_spec}" "\n")";
fi;
continue; ;;
"\'") if [ "${_var_spec%\'}" != "${_var_spec}" ]; then
_qchar="";
fi;
if [ "${_fnfl:-0}" -eq 1 ]; then
_vars="$(rtl_lconcat "${_vars}" "${_var_spec}" "\n")";
fi;
continue; ;;
*) case "${_var_spec}" in
[^=]*=\"*\") _qchar=""; _vname="${_var_spec%%=\"*}"; ;;
[^=]*=\"*) _qchar="\""; _vname="${_var_spec%%=\"*}"; ;;
[^=]*=\'*\') _qchar=""; _vname="${_var_spec%%=\'*}"; ;;
[^=]*=\'*) _qchar="\'"; _vname="${_var_spec%%=\'*}"; ;;
[^=]*=*) _qchar=""; _vname="${_var_spec%%=*}"; ;;
esac; ;;
esac;
if "${_fn}" "${_vname}"; then
_vars="${_vars:+${_vars}
}${_var_spec}"; _fnfl=1;
else
_fnfl=0;
fi;
done;
printf "%s" "${_vars}";
};
rtl_flock_acquire() {
local _fd="${1}" _conflict_exit_code="${2:-622}" _wait="${3:-3600}"
while true; do
if flock -E "${_conflict_exit_code}" -w "${_wait}" "${_fd}"; then
break;
elif [ "${?}" -eq "${_conflict_exit_code}" ]; then
continue;
else
return "${?}";
fi;
done;
};
rtl_get_cpu_count() {
local _line="" _ncpus=0 _rc=0 _sname="$(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 $1}' | sort;
};
rtl_head() {
local _pattern="${1}" _s="${2}";
while true; do
if [ "${_s%%${_pattern}}" = "${_s}" ]; then
break;
else
_s="${_s%%${_pattern}}";
fi;
done;
printf "%s" "${_s}";
};
rtl_is_newer() {
local _new_fname="${1}" _old_fname="${2}";
if [ -n "$(find -name "${_new_fname}" -newer "${_old_fname}" 2>/dev/null)" ]; then
return 0;
else
return 1;
fi;
};
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 notice "Command line: %s %s" "${_cmd}" "${*}";
else
rtl_log_msg notice "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}";
_vval_src="$(rtl_get_var_unsafe "${_vname_src}")";
if [ -n "${_vval_src}" ]; then
rtl_set_var_unsafe "PKG_${_vname_dst}" "${_vval_src}";
_vars_set_tmp="$(rtl_lconcat "${_vars_set_tmp}" "PKG_${_vname_dst}")";
fi;
done;
_vars_set_old="$(rtl_get_var_unsafe "${_vars_set_vname}")";
rtl_set_var_unsafe "${_vars_set_vname}" \
"$(rtl_lconcat "${_vars_set_old}" "${_vars_set_tmp}")";
};
# vim:filetype=sh
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