| Code Sample |
| #!/bin/bash # I don't know if the line above is for any use... But it's just my habit. # Because this "script" should be sourced by another scripts. # You could call this as helper-script. # Yes. I like to add much comments.;) # I added a licence to this script just if some one want to use this. ############################################################################ # LICENCE -=start=- # ############################################################################ #Copyright (c) 2007, Zucca # # All rights reserved. #Redistribution and use in source and binary forms, with or without #modification, are permitted provided that the following conditions are met: # - Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # - Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # - Neither the name of the Zucca's company nor the names of its # contributors may be used to endorse or promote products derived from # this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND # CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, # INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ############################################################################ # LICENCE -=end=- # ############################################################################ function chooseDialog { # This function simply choses the dialog app to use. # At the time of writing this only "dialog" is tested and it will be # chosen if found. Otherwise "whiptail" will be used. # There's propably many numbers of ways how to hide output. # I've seen much use of "> /dev/null 2>&1" but I'll stick with # "&> /dev/null" just because it's very neat. # http://tldp.org/LDP/abs/html/special-chars.html#REDIROUTERROR for # more. Here I use "2>" to hide error output (stderr) from # displaying. Normal output (stdout) will be directed to variable # DIALOGAPP and therefore will not be printed to screen. # I can't find any simplier way to assign this variable. # If you know better, plese inform me. ANY improvements are welcome. DIALOGAPP=`which dialog 2> /dev/null` \ || DIALOGAPP=`which whiptail 2> /dev/null` # Uncomment next line to have some kind of debug information # echo "Dialogapp: $DIALOGAPP" # Do we need to return this variable? I haven't done research for this. # Just to be sure we do it. # return $DIALOGAPP } function setDialogDimensions { # This function needs just any text for it's arguments. # Before calling, variable IFS should be set to "\n". # http://www.google.com/linux?q=Bash+IFS for more.;) # It genrates dialog dimension variables ($DIALOG_H and $DIALOG_W) with # proper width and height for the text depending on the terminal screen # size. # Normally if dialog is big enough it looks dirty. This function will # fix that. # First, get screen dimensions. # Ok this was quite hard for me. As I thought when script is called # there's no actual screen size (for example when script is called from # GUI). I ran some test and found no answer. Until I googled: # http://www.google.com/linux?q=stty+size+bash+script and found the # answer from the first hit. My problem was that I ran this script with # sh when I should ran it with sh. sh is a symbolic link to /bin/bash. # Either bash regonizes how it is called or it's my Linux system that # replaces sh with bash (I belive symbolic link is the default). # Anyway I added #!/bin/bash to the beginning of this script. Just to be # sure. # So next lines didn't worked at all. # SCREEN_H=`stty size | sed -e "s/ /\n/g" | head -n 1` # SCREEN_W=`stty size | sed -e "s/ /\n/g" | tail -n 1` # Next section is taken from: # http://www.linuxfromscratch.org/hints/downloads/files/easyrc.txt with # some modifications. # If COLUMNS hasn't been set yet (bash sets it but not # when called as sh), do it ourself # Get the console device if we don't have it already # This is ok by the FHS as there is a fallback if # /usr/bin/tty isn't available, for example at bootup. test -x /usr/bin/tty && CONSOLE=`/usr/bin/tty` test -z "$CONSOLE" && CONSOLE=/dev/console # Get the console size (rows columns) SIZE=$(stty size < $CONSOLE) # Strip off the rows leaving the columns SCREEN_W=${SIZE#*\ } # And get the rows too SCREEN_H=${SIZE%%\ *} echo "Screen Dimensions: $SCREEN_H $SCREEN_W" # I think decreasing eight from width and height of the max screen # size is enough. let "MAX_W = $SCREEN_W - 8" let "MAX_H = $SCREEN_H - 8" # Uncomment next line to have some kind of debug information #echo "Max dialog dimensions: $MAX_H $MAX_W" # Measure text dimensions TEXT_W=`echo "$@" | wc -L` TEXT_H=`echo "$@" | fold -sw $MAX_W | wc -l` # Uncomment next line to have some kind of debug information #echo "Text dimensions: $TEXT_H $TEXT_W" # Dialog needs to be a bit bigger than text dimensions. let "DIALOG_W = $TEXT_W + 4" let "DIALOG_H = $TEXT_H + 4" # Uncomment next line to have some kind of debug information #echo "Dialog size before check: $DIALOG_H $DIALOG_W" # If dimensions required by text are more than current screen can show # then set dialog dimension(s) to max. if [ "$DIALOG_W" -gt "$MAX_W" ] then let "DIALOG_W = $MAX_W" fi if [ "$DIALOG_H" -gt "$MAX_H" ] then let "DIALOG_H = $MAX_H" fi # Uncomment next line to have some kind of debug information #echo "Dialog size: $DIALOG_H $DIALOG_W" # Next line is to make a pause to read debug information #read # Finally, return dialog dimensions. # Again, I don't know if this is required. # return "$DIALOG_H" # return "$DIALOG_W" } ######################################################## # Next functions will execute/open simple dialog tasks.# ######################################################## function msgboxDialog { chooseDialog OIFS="$IFS" IFS="\n" setDialogDimensions "$@" # Change IFS back to default IFS="$OIFS" "$DIALOGAPP" \ --backtitle "$DIALOGBACKTITLE" \ --title "$DIALOGTITLE" \ --msgbox "$@" "$DIALOG_H" "$DIALOG_W" } # Now we can (for example) show motd in dialog by: # msgboxDialog `cat /etc/motd` # More functions will be added after bugs have been killed. |
| Code Sample |
| #!/bin/bash # I don't know if the line above is for any use. # IT IS. # Yes. I like to add much comments.;) # I added a licence to this script just if some one want to use this. ############################################################################ # LICENCE -=start=- # ############################################################################ #Copyright (c) 2007, Zucca # # All rights reserved. #Redistribution and use in source and binary forms, with or without #modification, are permitted provided that the following conditions are met: # - Redistributions of source code must retain the above copyright notice, # this list of conditions and the following disclaimer. # - Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # - Neither the name of the Zucca's company nor the names of its # contributors may be used to endorse or promote products derived from # this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND # CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, # INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF # MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN # CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR # OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ############################################################################ # LICENCE -=end=- # ############################################################################ function chooseDialog { # This function simply choses the dialog app to use. # At the time of writing this only "dialog" is tested and it will be # chosen if found. Otherwise "whiptail" will be used. # There's propably many numbers of ways how to hide output. # I've seen much use of "> /dev/null 2>&1" but I'll stick with # "&> /dev/null" just because it's very neat. # http://tldp.org/LDP/abs/html/special-chars.html#REDIROUTERROR for # more. Here I use "2>" to hide error output (stderr) from # displaying. Normal output (stdout) will be directed to variable # DIALOGAPP and therefore will not be printed to screen. # I can't find any simplier way to assign this variable. # If you know better, plese inform me. ANY improvements are welcome. DIALOGAPP=`which dialog 2> /dev/null` \ || DIALOGAPP=`which whiptail 2> /dev/null` # Uncomment next line to have some kind of debug information #echo "Dialogapp: $DIALOGAPP" # Do we need to return this variable? I haven't done research for this. # Just to be sure we do it. # return $DIALOGAPP } function setDialogDimensions { # This function needs just any text for it's arguments. # Before calling, variable IFS should be set to "\n". # http://www.google.com/linux?q=Bash+IFS for more.;) # It genrates dialog dimension variables ($DIALOG_H and $DIALOG_W) with # proper width and height for the text depending on the terminal screen # size. # Normally if dialog is big enough it looks dirty. This function will # fix that. # First, get screen dimensions. # Ok this was quite hard for me. As I thought when script is called # there's no actual screen size (for example when script is called from # GUI). I ran some test and found no answer. Until I googled: # http://www.google.com/linux?q=stty+size+bash+script and found the # answer from the first hit. My problem was that I ran this script with # sh when I should ran it with sh. sh is a symbolic link to /bin/bash. # Either bash regonizes how it is called or it's my Linux system that # replaces sh with bash (I belive symbolic link is the default). # Anyway I added #!/bin/bash to the beginning of this script. Just to be # sure. # So next lines didn't worked at all. # SCREEN_H=`stty size | sed -e "s/ /\n/g" | head -n 1` # SCREEN_W=`stty size | sed -e "s/ /\n/g" | tail -n 1` # Next section is taken from: # http://www.linuxfromscratch.org/hints/downloads/files/easyrc.txt with # some modifications. # If COLUMNS hasn't been set yet (bash sets it but not # when called as sh), do it ourself # Get the console device if we don't have it already # This is ok by the FHS as there is a fallback if # /usr/bin/tty isn't available, for example at bootup. test -x /usr/bin/tty && CONSOLE=`/usr/bin/tty` test -z "$CONSOLE" && CONSOLE=/dev/console # Get the console size (rows columns) SIZE=$(stty size < $CONSOLE) # Strip off the rows leaving the columns SCREEN_W=${SIZE#*\ } # And get the rows too SCREEN_H=${SIZE%%\ *} echo "Screen Dimensions: $SCREEN_H $SCREEN_W" # DECREASED BY 2 instead # SET PARAMETERS LIKE THIS AS VARS SO YOU CAN PLAY WITH THEM if [ "$SCREEN_W" -gt 0 ]; then let "MAX_W = $SCREEN_W - 2" fi if [ "$SCREEN_H" -gt 0 ]; then let "MAX_H = $SCREEN_H - 2" fi # Uncomment next line to have some kind of debug information #echo "Max dialog dimensions: $MAX_H $MAX_W" # Measure text dimensions # NEED DOUBLE QUOTES AOUND $1 TO PRESERVE LINE FORMATTING # ELSE JUST HAVE ONE LONG LINE TEXT_W=`echo "$1" | wc -L` TEXT_H=`echo "$1" | wc -l` # DON'T NEED fmt HERE # Uncomment next line to have some kind of debug information echo "Text dimensions: $TEXT_W $TEXT_H " # Dialog needs to be a bit bigger than text dimensions. # EQUAL X & Y DIMS IN WHIPTAIL DON'T GIVE A SQUARE # DOUBLE WIDTH TO GET APPROX SQUARE IF width < 2 x Height let "DIALOG_H = $TEXT_H + 8" let "THRESH = 2 * $DIALOG_H" let "DIALOG_W = $TEXT_W + 8" if [ $DIALOG_W -lt $THRESH ]; then let "DIALOG_W = 2 * $DIALOG_W" fi # Uncomment next line to have some kind of debug information #echo "Dialog size before check: $DIALOG_H $DIALOG_W" # SET MIN SIZE OR CAN'T SEE ANYTHING - something like: if [ "$DIALOG_W" -lt 20 ] then let "DIALOG_W = 20" fi if [ "$DIALOG_H" -lt 10 ] then let "DIALOG_H = 10" fi echo "MAX_W is $MAX_W MAX_H is $MAX_H" # If dimensions required by text are more than current screen can show # then set dialog dimension(s) to max. if [ "$DIALOG_W" -gt "$MAX_W" ] then let "DIALOG_W = $MAX_W" fi if [ "$DIALOG_H" -gt "$MAX_H" ] then let "DIALOG_H = $MAX_H" fi # Uncomment next line to have some kind of debug information echo "Dialog size: $DIALOG_H $DIALOG_W" # Next line is to make a pause to read debug information #read # Finally, return dialog dimensions. # THIS ISN'T DOING MUCH FOR YOU HERE } ######################################################## # Next functions will execute/open simple dialog tasks.# ######################################################## function msgboxDialog { chooseDialog IN="${1}" setDialogDimensions "${IN}" echo "dims $DIALOG_W $DIALOG_H" $DIALOGAPP --backtitle "DIALOGBACKTITLE" --title "DIALOGTITLE" --msgbox "${IN}" $DIALOG_H $DIALOG_W } # Now we can (for example) show motd in dialog by: msgboxDialog "$(cat /etc/motd)" # More functions will be added after bugs have been killed. |
| Quote |
| EQUAL X & Y DIMS IN WHIPTAIL DON'T GIVE A SQUARE |
| Quote |
| # Now we can (for example) show motd in dialog by: msgboxDialog "$(cat /etc/motd)" |
| Quote (mikshaw @ Oct. 06 2007,17:57) | ||||
cat /etc/motd | msgboxDialog |