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Full Discussion: [BASH] Errormessages and Traps with a 'here-doc'
Top Forums UNIX for Advanced & Expert Users [BASH] Errormessages and Traps with a 'here-doc' Post 302963229 by sea on Saturday 26th of December 2015 09:25:14 AM
Old 12-26-2015
Code:
grep $'\342' */*

Was great, figured during copy paste of a trap example, i copied − and didnt change to - .

So we're back to the wrong signal.
I tried to provide the 2 most essential parts, around the loading of the generated rc file (see above), and the (still the same) errors where the actual output happens.

Code:
<...>
#	Created:        2013.05.03 (rev:3)
#	Changed:	2015.11.07
#	Description:	The loader and configuration of TUI
#
#	Variables	:	Default
#
	# Check for '$HOME'
	if [ -z "$HOME" ]
	then	# HOME is empty, if UID is empty too, assume machine is still booting
		if [ 0 -eq "${UID:-0}" ]
		then	# Its root, check both even though /root is not standard
			known="/root /"
			for k in $(awk  -v FS=":" '/^root/ {print $6}' /etc/passwd 2>/dev/zero) $known
			do 	[ -d "$k" ] && HOME="$k" && export HOME && break
			done
		else	# Its normal user
			known="/Users /home"
			for k in $known	# Dont quote, or it would not expand to words / paths
			do 	[ -d "$k" ] && HOME="$k" && export HOME && break
			done
		fi
	fi
+ '[' -z /home/sea ']'
	# If its still empty, use 'cd' default behaviour to return to the users homedir if invoked without args
	[ -z "$HOME" ] && HOME="${k:-$(cd;pwd)}"
+ '[' -z /home/sea ']'
	
	# Regular definitions
	TRC="${HOME:-/root}/.tuirc"	# User default	-- If no HOME is set, assume the computer is booting
+ TRC=/home/sea/.tuirc
	TRC_SYS="$SYSCONFDIR/tuirc"
+ TRC_SYS=/tuirc
	
	# Get paths of where it was installed
	SYSCONFDIR=""
+ SYSCONFDIR=
	while [ -z "$SYSCONFDIR" ]
	do 	for install_kind in "/" "/usr" "$HOME/.local" "$HOME" "." "../conf.tui" 
		do 	tmp_cfg="$install_kind/etc/tui.conf"
			[ -f "$tmp_cfg" ] && source "$tmp_cfg" #&& break
		done
#		[ -f "./conf.tui/" ] && source ./conf.tui/$tmp_cfg && break
		
	done
+ '[' -z '' ']'
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=//etc/tui.conf
+ '[' -f //etc/tui.conf ']'
+ source //etc/tui.conf
PREFIX=/usr
++ PREFIX=/usr
BINDIR=/usr/bin
++ BINDIR=/usr/bin
SYSCONFDIR=/etc
++ SYSCONFDIR=/etc
DATADIR=/usr/share/tui
++ DATADIR=/usr/share/tui
DOCDIR=/usr/share/doc/tui
++ DOCDIR=/usr/share/doc/tui
HTMLDIR=/usr/share/doc/tui
++ HTMLDIR=/usr/share/doc/tui
INFODIR=/usr/share/info
++ INFODIR=/usr/share/info
MAN1DIR=/usr/share/man/man1
++ MAN1DIR=/usr/share/man/man1
COMPLDIR=/etc/bash_completion.d
++ COMPLDIR=/etc/bash_completion.d
HOMEBASE=//home
++ HOMEBASE=//home
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=/usr/etc/tui.conf
+ '[' -f /usr/etc/tui.conf ']'
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=/home/sea/.local/etc/tui.conf
+ '[' -f /home/sea/.local/etc/tui.conf ']'
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=/home/sea/etc/tui.conf
+ '[' -f /home/sea/etc/tui.conf ']'
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=./etc/tui.conf
+ '[' -f ./etc/tui.conf ']'
+ for install_kind in '"/"' '"/usr"' '"$HOME/.local"' '"$HOME"' '"."' '"../conf.tui"'
+ tmp_cfg=../conf.tui/etc/tui.conf
+ '[' -f ../conf.tui/etc/tui.conf ']'
+ '[' -z /etc ']'
	
	# Get system wide default configuration paths
	[ -z "$SYSCONFDIR" ] && \
		printf '%s\n' "$(gettext 'Please attempt a fresh installation of TUI.')" && \
		( return 1 || exit 1 )
+ '[' -z /etc ']'
	source "$SYSCONFDIR/tuirc"
+ source /etc/tuirc
#!/usr/bin/env bash
# ------------------------------------------------------------------------
# Copyright (C) 1996-2015 Simon Arjuna Erat (sea) <erat.simon@gmail.com>
# All rights reserved.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>
# ------------------------------------------------------------------------
#
#	This file provides the core of the heart
#
	# This project
	TUI_VERSION=0.9.4-inprogress	# 0.9.4
++ TUI_VERSION=0.9.4-inprogress
	# This script
	TRC_VERSION=3.0
++ TRC_VERSION=3.0
	#TUI_AUTHOR="Simon Arjuna Erat (sea), Switzerland"
#
#	This file is NOT meant to be changed.
#
	[ -z "$TUI_DIR_CONF" ]		&& readonly TUI_DIR_CONF="/etc/tui"
++ '[' -z '' ']'
++ readonly TUI_DIR_CONF=/etc/tui
++ TUI_DIR_CONF=/etc/tui
	[ -z "$TUI_DIR_SYSTEM" ] 	&& readonly TUI_DIR_SYSTEM="/usr/share/tui"
++ '[' -z '' ']'
++ readonly TUI_DIR_SYSTEM=/usr/share/tui
++ TUI_DIR_SYSTEM=/usr/share/tui
#
#	Paths	:	Used to run TUI
#
	TUI_DIR_TEMP="/var/tmp"
++ TUI_DIR_TEMP=/var/tmp
	TUI_DIR_LOG="/home/sea/.config/tui/logs"
++ TUI_DIR_LOG=/home/sea/.config/tui/logs
	TUI_DIR_THEMES="$TUI_DIR_SYSTEM/themes"
++ TUI_DIR_THEMES=/usr/share/tui/themes
	[ -z "$TUI_DIR_TEMPLATES" ] 	&& readonly TUI_DIR_TEMPLATES="$TUI_DIR_SYSTEM/templates"
++ '[' -z '' ']'
++ readonly TUI_DIR_TEMPLATES=/usr/share/tui/templates
++ TUI_DIR_TEMPLATES=/usr/share/tui/templates
	[ -z "$TUI_DIR_FUNCTIONS" ] 	&& readonly TUI_DIR_FUNCTIONS="$TUI_DIR_SYSTEM/functions"
++ '[' -z '' ']'
++ readonly TUI_DIR_FUNCTIONS=/usr/share/tui/functions
++ TUI_DIR_FUNCTIONS=/usr/share/tui/functions
	[ -z "$TUI_DIR_LOCALE" ]	&& readonly TUI_DIR_LOCALE="$TUI_DIR_SYSTEM/locale"
++ '[' -z '' ']'
++ readonly TUI_DIR_LOCALE=/usr/share/tui/locale
++ TUI_DIR_LOCALE=/usr/share/tui/locale
	[ -z "$TUI_DIR_LIST" ]		&& readonly TUI_DIR_LIST="$TUI_DIR_SYSTEM/lists"
++ '[' -z '' ']'
++ readonly TUI_DIR_LIST=/usr/share/tui/lists
++ TUI_DIR_LIST=/usr/share/tui/lists
#
#	Files
#	Direct access to the most important configuration files for the System
#
	[ -z "$TUI_FILE_CONF_APPS" ] 	&& readonly TUI_FILE_CONF_APPS="$TUI_DIR_CONF/apps.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_APPS=/etc/tui/apps.conf
++ TUI_FILE_CONF_APPS=/etc/tui/apps.conf
	[ -z "$TUI_FILE_CONF_COLORS" ]	&& readonly TUI_FILE_CONF_COLORS="$TUI_DIR_CONF/colors.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_COLORS=/etc/tui/colors.conf
++ TUI_FILE_CONF_COLORS=/etc/tui/colors.conf
	[ -z "$TUI_FILE_CONF_COMMANDS" ] && readonly TUI_FILE_CONF_COMMANDS="$TUI_DIR_CONF/commands.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_COMMANDS=/etc/tui/commands.conf
++ TUI_FILE_CONF_COMMANDS=/etc/tui/commands.conf
	[ -z "$TUI_FILE_CONF_SETTINGS" ] && readonly TUI_FILE_CONF_SETTINGS="$TUI_DIR_CONF/settings.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_SETTINGS=/etc/tui/settings.conf
++ TUI_FILE_CONF_SETTINGS=/etc/tui/settings.conf
	[ -z "$TUI_FILE_CONF_SYSTEM" ]	&& readonly TUI_FILE_CONF_SYSTEM="$TUI_DIR_CONF/tui.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_SYSTEM=/etc/tui/tui.conf
++ TUI_FILE_CONF_SYSTEM=/etc/tui/tui.conf
	[ -z "$TUI_FILE_CONF_STATUS" ]	&& readonly TUI_FILE_CONF_STATUS="$TUI_DIR_CONF/status.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_STATUS=/etc/tui/status.conf
++ TUI_FILE_CONF_STATUS=/etc/tui/status.conf
	[ -z "$TUI_FILE_CONF_SHORTS" ]	&& readonly TUI_FILE_CONF_SHORTS="$TUI_DIR_CONF/shorts.conf"
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_SHORTS=/etc/tui/shorts.conf
++ TUI_FILE_CONF_SHORTS=/etc/tui/shorts.conf
	[ -z "$TUI_FILE_CONF_ALIAS" ]	&& readonly TUI_FILE_CONF_ALIAS="$TUI_DIR_CONF/shorts-alias.conf"		
++ '[' -z '' ']'
++ readonly TUI_FILE_CONF_ALIAS=/etc/tui/shorts-alias.conf
++ TUI_FILE_CONF_ALIAS=/etc/tui/shorts-alias.conf
#
#	Low level workarounds, fallbacks and 'make sures' before the system config is read
#
	HOMEBASE="//home"	# This should provide OS independant base for regular users.
++ HOMEBASE=//home
	HOME="${HOME:-$(eval echo ~${SUDO_USER:-$USER})}"
++ HOME=/home/sea
	TERM="${TERM:-GNU\057Linux}"
++ TERM=xterm
	WIDTH="${COLUMNS:-$(tput cols)}"
tput cols
+++ tput cols
++ WIDTH=119
	HEIGHT="${LINES:-$(tput lines)}"
tput lines
+++ tput lines
++ HEIGHT=80
	TUI_THEME="default"
++ TUI_THEME=default
	AWK=\gawk
++ AWK=gawk
	GREP=\grep
++ GREP=grep
	SED=\sed
++ SED=sed
	LS=\ls
++ LS=ls
#
#	Color and other formatting
#	Since this is also for 'endusers', this is all small letters
#
	reset="\033[0m" 	;	invert="\033[7m"
++ reset='\033[0m'
++ invert='\033[7m'
	bold="\033[1m"  	; 	stroke="\033[9m" 	;	underline="\033[4m"
++ bold='\033[1m'
++ stroke='\033[9m'
++ underline='\033[4m'
	
	# --- Colors : foreground ----- Colors : background ------------
	
	black="\033[30m"	;	bg_black="\033[40m"
++ black='\033[30m'
++ bg_black='\033[40m'
	red="\033[31m"  	;	bg_red="\033[41m"
++ red='\033[31m'
++ bg_red='\033[41m'
	green="\033[32m"	;	bg_green="\033[42m"
++ green='\033[32m'
++ bg_green='\033[42m'
	yellow="\033[33m"	;	bg_yellow="\033[43m"
++ yellow='\033[33m'
++ bg_yellow='\033[43m'
	blue="\033[34m" 	;	bg_blue="\033[44m"
++ blue='\033[34m'
++ bg_blue='\033[44m'
	purple="\033[35m"	;	bg_purple="\033[45m"
++ purple='\033[35m'
++ bg_purple='\033[45m'
	cyan="\033[36m" 	;	bg_cyan="\033[46m"
++ cyan='\033[36m'
++ bg_cyan='\033[46m'
	white="\033[37m"	;	bg_white="\033[47m"
++ white='\033[37m'
++ bg_white='\033[47m'
#
#	Protection and Error handling
#
	break_on_injections() { # ARGS
	# Searches for injection subjects
	# Returns true if it finds some
		#trap - HUP INT QUIT ABRT ALRM TERM EXIT
		
		typeset arg ac=0
		for arg do
		ac="1"
		case "" in
		(*[';´|<&>']*|*':('*|*':-'*)
			printf "%s\n" "Aborting, injection detected! arg${ac}='$arg'"
			return 0
		;;
		esac
		done
		#trap - HUP INT QUIT ABRT ALRM TERM EXIT
		return 1
	}
	msg_error() { # CALLER SCRIPT FUNCNAME LINENO [CONTENT]
	# Prints an error message and exits
	#
		caller="$1" script="$2" fname="$3" lineno="$4" 
		shift 4
		content=(${@})
		
		printf '\r\t%s:\t%s\n' \
			"Caller of script" "$caller" \
			"Scriptname" "$script" \
			"Functionname" "$fname" \
			"Linenumber" "$lineno"
		for cont in "${content[@]}";do
			printf '\t%s\n' "$cont"
		done
		trap - HUP INT QUIT ABRT ALRM TERM EXIT
		exit 1
	}
#
#	Traps & Error messages
#
	traps_save(){ saved_traps=$(trap) ; export saved_traps ; }
	traps_restore() { eval $saved_traps;}
	export -f msg_error traps_save traps_restore
++ export -f msg_error traps_save traps_restore
	# Set and save basic error message traping, 
	trap "msg_error ${CALLER:-$0} $0 ${FUNCNAME:-NON-FUNCTION} $LINENO '$@'" INT ABRT TERM 
++ trap 'msg_error /usr/bin/tuirc /usr/bin/tuirc NON-FUNCTION 130 '\'''\''' INT ABRT TERM
	## HUP INT QUIT ABRT KILL ALRM TERM ## 1 2 3 6 9 14 15
	traps_save	# Save initial traps
++ traps_save
trap
+++ trap
++ saved_traps='trap -- '\''msg_error /usr/bin/tuirc /usr/bin/tuirc NON-FUNCTION 130 '\''\'\'''\'''\''\'\'''\'''\'' SIGINT
trap -- '\''msg_error /usr/bin/tuirc /usr/bin/tuirc NON-FUNCTION 130 '\''\'\'''\'''\''\'\'''\'''\'' SIGABRT
trap -- '\'''\'' SIGUSR1
trap -- '\''msg_error /usr/bin/tuirc /usr/bin/tuirc NON-FUNCTION 130 '\''\'\'''\'''\''\'\'''\'''\'' SIGTERM'
++ export saved_traps
#
#	Functions
#
	<...>



VISUAL DIVIDER




Code:
<...>
+ TEXTDOMAIN=tuirc
+ TEXTDOMAINDIR=/usr/share/locale
+ export TEXTDOMAIN TEXTDOMAINDIR
date +%F
++ date +%F
+ hello_date=2015-12-26
date +%T
++ date +%T
+ hello_time=12:33:00
eval_gettext '$USER_NAME, ${hello_time} ${hello_date}'
++ eval_gettext '$USER_NAME, ${hello_time} ${hello_date}'
++ gettext '$USER_NAME, ${hello_time} ${hello_date}'
envsubst --variables "$1"
+++ envsubst --variables '$USER_NAME, ${hello_time} ${hello_date}'
++ export PATH USER_NAME hello_time hello_date
++ envsubst '$USER_NAME, ${hello_time} ${hello_date}'
+ MSG_TR_HELLO_USER='Simon Arjuna Erat (sea), 12:33:00 2015-12-26'
+ case "$1" in
+ MODE=
+ YES=false
+ case "$MODE" in
+ '[' '' = reset ']'
gettext 'hit-tab'
++ gettext hit-tab
+ HIT_TAB=hit-tab
tput cols
++ tput cols
+ COLUMNS=119
+ . /usr/share/tui/themes/default
# Simplified design:
#
#	BORDER_RIGHT will be mirrored of BORDER_LEFT
#	Set it manualy if it needs to be escaped.
#
	BORDER_LEFT="# |"
++ BORDER_LEFT='# |'
#
#	tui-header will use TUI_BACKGROUND as background color,
#	and TUI_FOREGROUND as font color.
#
#	tui-title will use inverted colors
#
	TUI_BACKGROUND="$TUI_COLOR_BG_BLUE"
++ TUI_BACKGROUND='\033[44m'
	TUI_FOREGROUND="$TUI_COLOR_FG_WHITE"
++ TUI_FOREGROUND='\033[37m'
	BORDER_COLOR=""
++ BORDER_COLOR=
#
#	Char indicators
#
	TUI_INPUT_CHAR_READ="\076"
++ TUI_INPUT_CHAR_READ='\076'
	TUI_INPUT_CHAR_SELECT="\076"
++ TUI_INPUT_CHAR_SELECT='\076'
+ n=102
+ POS='\033[102G'
eval_gettext 'TUI ($TUI_VERSION), Copyright (c) 2015 by sea'
++ eval_gettext 'TUI ($TUI_VERSION), Copyright (c) 2015 by sea'
++ gettext 'TUI ($TUI_VERSION), Copyright (c) 2015 by sea'
envsubst --variables "$1"
+++ envsubst --variables 'TUI ($TUI_VERSION), Copyright (c) 2015 by sea'
++ export PATH TUI_VERSION
++ envsubst 'TUI ($TUI_VERSION), Copyright (c) 2015 by sea'
+ tui-print -H 'TUI (0.9.4-inprogress), Copyright (c) 2015 by sea' 'Simon Arjuna Erat (sea), 12:33:00 2015-12-26'
/etc/tuirc: line 130: trap: TUI (0.9.4-inprogress), Copyright (c) 2015 by sea: invalid signal specification
/etc/tuirc: line 130: trap: Simon Arjuna Erat (sea), 12:33:00 2015-12-26': invalid signal specification
# | TUI (0.9.4-inprogress), Copyright (c) 2015 by sea                 Simon Arjuna Erat (sea), 12:33:00 2015-12-26 | #
<...>

Code:
# |                                                                                                                | #
gettext 'Configure it now?'
++ gettext 'Configure it now?'
+ tui-yesno 'Configure it now?'
/etc/tuirc: line 130: trap: 0': invalid signal specification
/etc/tuirc: line 130: trap: 0': invalid signal specification
/etc/tuirc: line 130: trap: 0': invalid signal specification
/etc/tuirc: line 130: trap: 0': invalid signal specification
/etc/tuirc: line 130: trap: 0': invalid signal specification
/etc/tuirc: line 130: trap: Configure it now?': invalid signal specification
/etc/tuirc: line 130: trap: Configure it now? (y/n) : invalid signal specification                                 | #
/etc/tuirc: line 130: trap: n': invalid signal specification
# | Configure it now? (y/n)                                                                                      n | #
+ exit 0
0 ~/prjs/tui $ cat -n /etc/tuirc | grep 131
   131		trap "msg_error ${CALLER:-$0} $0 ${FUNCNAME:-NON-FUNCTION} $LINENO '$@'" ABRT ALRM HUP QUIT TERM  2>/dev/zero

In the end, the interesting part is - it prints the output as expected, just with a leading error output...

Something i just realized...
Code:
/etc/tuirc: line 130: trap: Configure it now?': invalid signal specification
/etc/tuirc: line 130: trap: Configure it now? (y/n) : invalid signal specification                                 | #
/etc/tuirc: line 130: trap: n': invalid signal specification
# | Configure it now? (y/n)                                                                                      n | #

As the userinput was 'n', which was taken as a trap signal, i'm more confused on this subject than ever.

I removed 'INT' now, since i belive ctrl+c should not raise an error message.
Code:
# | Configure it now? (y/n) ^C                                                                                     | #
	Callerscript:	/usr/bin/tui-yesno
	Scriptname:	/usr/bin/tui-yesno
	Functionname:	NON-FUNCTION
	Linenumber:	130
	* Configure
	* it
	* now?
1 ~/prjs/tui $ cat -n /etc/tuirc | grep 130
   130		trap "msg_error ${CALLER:-$0} $0 ${FUNCNAME:-NON-FUNCTION} $LINENO '$@'" INT ABRT ALRM HUP QUIT TERM  2>/dev/null

Just to verify if 'everyting else' is working properly, i've redirected stderr to null "temporary".

Q (follow up): I'm afraid it'll always will be line 130, unless i define the trap somewhere else again?
As in this example: <cmd> || msg_error [args...]

---------- Post updated at 15:25 ---------- Previous update was at 13:31 ----------

I dont like it, but very often echo seems the solution...
Code:
trap "msg_error \${CALLER:-\$0} \$0 \${FUNCNAME:-NON-FUNCTION} \$LINENO '\$(echo \${@})'" ABRT HUP QUIT ALRM #INT

/solved

EDIT: Thank you very much Don!
Last edited by sea; 12-26-2015 at 10:41 AM..
 

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