I'm trying to increase usabilty for my scripted project-, for that i wanted to apply an error message poping up upon every and any error (other than proper exit) indicating the enduser a uniform, and hopefully readable error messsage.
To achieve this, i wrote a msg_error function, and prepared some trap handling...
Code:
msg_error() { # CALLER SCRIPT FUNCNAME LINENO [CONTENT]
# Prints an error message and exits
#
caller="\$1" script="\$2" fname="\$3" lineno="\$4"
shift 4
content=($(echo "\${@}"))
printf '\r\t%s:\t%s\n' \\
"$(gettext 'Caller of script')" "\$caller" \\
"$(gettext 'Scriptname')" "\$script" \\
"$(gettext 'Functionname')" "\$fname" \\
"$(gettext 'Linenumber')" "\$lineno"
for cont in "\${content[@]}";do
printf '\t%s\n' "\$cont"
done
trap − INT QUIT TERM EXIT
exit 1
}
Code:
#
# Traps & Error messages
#
traps_save(){ saved_traps=\$(trap) ; export saved_traps ; }
traps_restore() { eval \$saved_trap;}
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 'Args: \$@' " HUP INT QUIT ABRT KILL ALRM TERM ## 1 2 3 6 9 14 15
traps_save # Save initial traps
My issue isnt this... well at least not really..
My issue is the follow up, when callling a script with the same name (but which is intended to be executed, while this generated script is ment to be sourced).
Code:
0 ~/prjs/tui $ export LC_ALL=C
0 ~/prjs/tui $ ./make ; sudo ./make-install ; sh ./tuirc ##(this is /etc/tuirc)
0 ~/prjs/tui $ bash -x $(which tuirc) ## (this is /bin/tuirc)
+ tui-print -H 'TUI (0.9.4-inprogress), Copyright (c) 2015 by sea' 'Simon Arjuna Erat (sea), 08:02:02 2015-12-26'
/etc/tuirc: line 129: trap: TUI (0.9.4-inprogress), Copyright (c) 2015 by sea: invalid signal specification
/etc/tuirc: line 129: trap: Simon Arjuna Erat (sea), 08:02:02 2015-12-26' : invalid signal specification
<..>
1 ~/prjs/tui $ which tuirc
/usr/bin/tuirc
So the search for one of the errrors ($'\212.... not found) became more complicated than expected...
Code:
cat -n /etc/tuirc | grep 129
129 trap "msg_error ${CALLER:-$0} $0 ${FUNCNAME:-NON-FUNCTION} $LINENO '$@'" INT QUIT TERM
## HUP INT QUIT ABRT KILL ALRM TERM ## 1 2 3 6 9 14 15
I dont understand where the invalid signal spec comes from?
Specialy since calling the /etc/tuirc script by itself, it closes without error, but sourcing from other files, it raises one, in way i cant follow the reason.
Any ideas or advices please?
Thank you in advance.
Hello
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Good morning to you all
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Hi,
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12-26-2015
[BASH] Errormessages and Traps with a 'here-doc'
