C++ Library containing a lot of needful things: Stack Trace, Command Line Parser, Resource Handling, Configuration Files, Unix Command Execution, Directories, Regular Expressions, Tokenizer, Function Trace, Standard Extensions.
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#!/bin/bash -e
##########################################################################################
#### template for bash scripts #### START BELOW ##########################################
##########################################################################################
############################################################################ begin logging
# check if stdout is a terminal...
if test -t 1; then
# see if it supports colors...
ncolors=$(tput colors)
if test -n "$ncolors" && test $ncolors -ge 8; then
bold="$(tput bold)"
underline="$(tput smul)"
standout="$(tput smso)"
normal="$(tput sgr0)"
black="$(tput setaf 0)"
red="$(tput setaf 1)"
green="$(tput setaf 2)"
yellow="$(tput setaf 3)"
blue="$(tput setaf 4)"
magenta="$(tput setaf 5)"
cyan="$(tput setaf 6)"
white="$(tput setaf 7)"
fi
fi
append_msg() {
if test $# -ne 0; then
echo -n ": ${bold}$*"
fi
echo "${normal}"
}
# write a message
message() {
if test $# -eq 0; then
return
fi
echo "${bold}${while}$*${normal}" 1>&2
}
# write a success message
success() {
echo -n "${bold}${green}success" 1>&2
append_msg $* 1>&2
}
# write a notice
notice() {
echo -n "${bold}${yellow}notice" 1>&2
append_msg $* 1>&2
}
# write a warning message
warning() {
echo -en "${bold}${red}warning" 1>&2
append_msg $* 1>&2
}
# write error message
error() {
echo -en "${bold}${red}error" 1>&2
append_msg $* 1>&2
}
# run a command, print the result and abort in case of error
# option: --ignore: ignore the result, continue in case of error
run() {
ignore=1
while test $# -gt 0; do
case "$1" in
(--ignore) ignore=0;;
(*) break;;
esac
shift;
done
echo -n "${bold}${yellow}running:${white} $*${normal}"
set +e
result=$($* 2>&1)
res=$?
set -e
if test $res -ne 0; then
if test $ignore -eq 1; then
error "failed with return code: $res"
if test -n "$result"; then
echo "$result"
fi
exit 1
else
warning "ignored return code: $res"
fi
else
success
fi
}
############################################################################ error handler
function traperror() {
set +x
local err=($1) # error status
local line="$2" # LINENO
local linecallfunc="$3"
local command="$4"
local funcstack="$5"
for e in ${err[@]}; do
if test -n "$e" -a "$e" != "0"; then
error "line $line - command '$command' exited with status: $e (${err[@]})"
if [ "${funcstack}" != "main" -o "$linecallfunc" != "0" ]; then
echo -n " ... error at ${funcstack} " 1>&2
if [ "$linecallfunc" != "" ]; then
echo -n "called at line $linecallfunc" 1>&2
fi
echo
fi
exit $e
fi
done
success
exit 0
}
# catch errors
trap 'traperror "$? ${PIPESTATUS[@]}" $LINENO $BASH_LINENO "$BASH_COMMAND" "${FUNCNAME[@]}" "${FUNCTION}"' ERR SIGINT INT TERM EXIT
##########################################################################################
#### START HERE ##########################################################################
##########################################################################################
######################################################### commandline parameter evaluation
while test $# -gt 0; do
case "$1" in
(--help|-h) less <<EOF
SYNOPSIS
$0 [OPTIONS]
OPTIONS
--help, -h show this help
DESCRIPTION
EOF
exit;;
(*) error "unknow option $1, try $0 --help"; exit 1;;
esac
if test $# -eq 0; then
error "missing parameter, try $0 --help"; exit 1
fi
shift;
done
##################################################################################### Main