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Full Discussion: Bash expansion
Top Forums Shell Programming and Scripting Bash expansion Post 302991326 by jcdole on Thursday 9th of February 2017 06:52:24 AM
Old 02-09-2017
Bash expansion
Hello.
I cannot write a command without using eval.
Any help is welcome

Note 1 : What does the function SOMETHING has no importance.
Note 2 : What does the command find has no importance.

It is an expansion variable problem : where to put ["] or [\"] or [ '] or anythings else

What works (FILTRE_1 and FILTRE_2 are taken into account) :

Code:
function CHERCHE () {

    MY_PATH1="$1"
    if [[  ! -d "$MY_PATH1" ]] ; then
        echo "doing : $MY_PATH1"
        /usr/bin/kate "$MY_PATH1"
    fi
}
export -f CHERCHE

MY_PATH="/home/bidon"

FILTRE_1=" -path  $MY_PATH/.local/share/kscreen  -o -path  $MY_PATH/.local/share/baloo   -o -path  $MY_PATH/.dbus"

FILTRE_2=" ! -name \".direct*\"  ! -name \".Xauthority\"  ! -name \".xsession*\"  ! -name \".bash_history\" "

CMD="find \"$MY_PATH\"  -type d \( $FILTRE_1  \) -prune -o  \( $FILTRE_2 -exec bash -c 'CHERCHE \$0 '  {} \; \)  "
echo "COMMAND : $CMD"
eval "$CMD"

# The command return 9 files which is the good result

What does not works (FILTRE_1 is taken into account, FILTRE_2 or FILTRE_3 or FILTRE_2 is ignored ) :
Filter_2 is same as above

Code:
FILTRE_2=" ! -name \".direct*\"  ! -name \".Xauthority\"  ! -name \".xsession*\"  ! -name \".bash_history\" "

FILTRE_3=' ! -name ".direct*"  ! -name ".Xauthority"  ! -name ".xsession*"  ! -name ".bash_history" '

FILTRE_4=" ! -name '.direct*'  ! -name '.Xauthority' ! -name '.xsession*'  ! -name '.bash_history' "

find "$MY_PATH"  -type d \( $FILTRE_1  \) -prune -o  \( $FILTRE_2 -exec bash -c 'CHERCHE "$0" ' {} \;  \)
#FILTER_2 does nothing

find "$MY_PATH"  -type d \( $FILTRE_1  \) -prune -o  \( $FILTRE_3 -exec bash -c 'CHERCHE "$0" ' {} \;  \)
#FILTER_3 does nothing

find "$MY_PATH"  -type d \( $FILTRE_1  \) -prune -o  \( $FILTRE_4 -exec bash -c 'CHERCHE "$0" ' {} \;  \)
#FILTER_4 does nothing

#Each command return 15 files because filter 3,4,5 , does nothing.

 

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LEARN ABOUT DEBIAN

openvt

OPENVT(1)							     Linux 1.x								 OPENVT(1)

NAME

       openvt - start a program on a new virtual terminal (VT).

SYNOPSIS

       openvt [-c vtnumber] [OPTIONS] [--] command

DESCRIPTION

       openvt  will  find the first available VT, and run on it the given command with the given command options, standard input, output and error
       are directed to that terminal. The current search path ($PATH) is used to find the requested command. If no command is specified  then  the
       environment variable $SHELL is used.

   OPTIONS
       -c, --console=VTNUMBER
	      Use the given VT number and not the first available. Note you must have write access to the supplied VT for this to work;

       -f, --force
	      Force opening a VT without checking whether it is already in use;

       -e, --exec
	      Directly execute the given command, without forking.  This option is meant for use in /etc/inittab.  If you want to use this feature
	      in another context, be aware that openvt has to be a session leader in order for -e to work.  See setsid(2) or setsid(1) on  how	to
	      achieve this.

       -s, --switch
	      Switch to the new VT when starting the command. The VT of the new command will be made the new current VT;

       -u, --user
	      Figure out the owner of the current VT, and run login as that user.  Suitable to be called by init. Shouldn't be used with -c or -l;

       -l, --login
	      Make the command a login shell. A - is prepended to the name of the command to be executed;

       -v, --verbose
	      Be a bit more verbose;

       -w, --wait
	      wait  for command to complete. If -w and -s are used together then openvt will switch back to the controlling terminal when the com-
	      mand completes;

       -V, --version
	      print program version and exit;

       -h, --help
	      show this text and exit.

       --     end of options to openvt.

NOTE

       If openvt is compiled with a getopt_long() and you wish to set options to the command to be run, then you must supply the end of options --
       flag before the command.

EXAMPLES

       openvt can be used to start a shell on the next free VT, by using the command:

       openvt bash

       To start the shell as a login shell, use:

       openvt -l bash

       To get a long listing you must supply the -- separator:

       openvt -- ls -l

HISTORY

       Earlier, openvt was called open.  It was written by Jon Tombs <jon@gtex02.us.es or jon@robots.ox.ac.uk>.  The -w idea is from "sam".

SEE ALSO

       chvt(1), doshell(8), login(1)

19 Jul 1996							       V1.4								 OPENVT(1)
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