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Top Forums Shell Programming and Scripting Script to process a list of items and uncomment lines with that item in a second file Post 303042866 by LMHmedchem on Wednesday 8th of January 2020 09:40:59 PM
Old 01-08-2020
Script to process a list of items and uncomment lines with that item in a second file

Hello,

I have a src code file where I need to uncomment many lines.

The lines I need to uncomment look like,

Code:
C      CALL l_r(DESNAME,DESOUT, 'Gmax',     ESH(10),  NO_APP, JJ)

The comment is the "C" in the first column. This needs to be deleted so that there are 6 spaces preceding "CALL". The key on this line is 'Gmax'. This lets me know that the line needs to be uncommented.

I have a list of such keys
Code:
Gmax
Gmin
HS10
HS2
HS9
Hmax

Each key (including the single quotes) will occur only once in the src file being processed. I need to process the list file to look in the src file and uncomment the proper lines. There are about 300 keys in the list file.

This is what I tried,
Code:
#! /bin/bash

# file with list of items to find in modify_file
list_file=$1
# file for which a modified copy will be created
modify_file=$2
# final output file
new_file='new_'$modify_file

# copy the file being modified
cp -f $modify_file  work_on_file.txt

# loop through all the lines in the list_file
while IFS= read -r line
do

   # add single quotes
   look_for=\'$line\'

   echo "looking for line with " $look_for

   # look for the value in the current line
   # if the value is found on a line, print the substring of $0 skipping the first character
   # if the value is not on the line, just print the line
   awk -v find_to_modify=$look_for ' { if ($0 ~ find_to_modify)
                                          { print substr($0,2); }
                                       else
                                          { print $0; }
                                     } ' work_on_file.txt > new_file

   # rename the modified file from this loop for the next loop
   mv new_file  work_on_file.txt

done < "$list_file"

# rename final copy
mv work_on_file.txt  $new_file

This simply reads the list file and one at a time looks for the items in the file to modify. The awk code looks for the presence of the key on each line (including the single quotes) and if found prints the substring skipping the first character. When the key is not found on the line, the line is printed unmodified. After the key is processed, the akw modified file is renamed to be the file awk is working on for the next loop.

This works as far as I can tell. I am writing an entire copy of the modified file for each key in the list file, so this is not very efficient. The file renaming at the end of the loop is a bit kludgy as well. This only takes about 7 seconds to run, so maybe I am being picky and should just let it be but I thought I would ask if there were other suggestions.

LMHmedchem
 

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XTERMCONTROL(1) 						   User Commands						   XTERMCONTROL(1)

NAME
xtermcontrol - dynamic control of XFree86 xterm properties. SYNOPSIS
xtermcontrol [OPTIONS]... DESCRIPTION
xtermcontrol makes it easy to change colors, title, font and geometry of a running XFree86 xterm(1), as well as to report the current set- tings of the aforementioned properties. Window manipulations de-/iconify, raise/lower, maximize/restore and reset are also supported. To complete the feature set; xtermcontrol lets advanced users issue any xterm control sequence of their choosing. OPTIONS
--fg=COLOR Set foreground color (see also COLOR NAMES). --bg=COLOR Set background color. --colorN=COLOR Set N'th [0-15] color. --highlight=COLOR Set highlight color. --cursor=COLOR Set cursor color. --mouse-fg=COLOR Set mouse pointer foreground color. --mouse-bg=COLOR Set mouse pointer background color. --font=FONT Set font name (see also FONT NAMES). Alternatively it is possible to specify a fontmenu index as '#[0-6]' or navigate the fontmenu by relative sizes as '#+N' or '#-N', where N is an optional integer. --title=STRING Set window title. Note that mechanisms like the bash(1) PROMPT_COMMAND may overwrite the title. --geometry=WIDTHxHEIGHT+XOFF+YOFF Set size and/or position. Through its control sequences the xterm only recognize positive XOFF and YOFF offsets, which are pixels relative to the upper left hand corner of the display. xtermcontrol is therefore unable to handle negative offsets as described in the X(7x) GEOMETRY SPECIFICATIONS and therefore truncates negative values to zero. --get-fg Report foreground color. --get-bg Report background color. --get-colorN Report N'th [0-15] color. --get-highlight Report highlight color. --get-cursor Report cursor color. --get-mouse-fg Report mouse pointer foreground color. --get-mouse-bg Report mouse pointer background color. --get-font Report font. --get-title Report window title. --get-geometry Report size and position. The size of the text area is reported in characters and the position is reported in pixels relative to the upper left hand corner of the display. --maximize Maximize window. --restore Restore maximized window. --iconify Iconify window. --de-iconify De-iconify window. --raise Raise window. --lower Lower window. --reset Full reset. --raw=CTLSEQS Issue raw control sequence (see also XTERM CONTROL SEQUENCES). --file=FILE Force xtermcontrol to read configurations (see also CONFIGURATION) from FILE instead of the standard personal initialization file ~/.xtermcontrol. --force, -f Skip TERM environment variable check. --verbose, -v Print verbose reports. --help, -h Print help message and exit. --version Print the version number and exit. CONFIGURATION
xtermcontrol reads a default, ~/.xtermcontrol, or a user specified configuration file on startup. Each line in the file is either a com- ment or contains an attribute. Attributes consist of a keyword and an associated value: keyword = value # comment The valid keyword/value combinations are: foreground="COLOR" background="COLOR" highlight="COLOR" cursor="COLOR" mouse-foreground="COLOR" mouse-background="COLOR" geometry="WIDTHxHEIGHT+XOFF+YOFF" font="FONT" color0="COLOR" color1="COLOR" color2="COLOR" color3="COLOR" color4="COLOR" color5="COLOR" color6="COLOR" color7="COLOR" color8="COLOR" color9="COLOR" color10="COLOR" color11="COLOR" color12="COLOR" color13="COLOR" color14="COLOR" color15="COLOR" Whitespace is ignored in attributes unless within a quoted value. The character '#' is taken to begin a comment. Each '#' and all remaining characters on that line is ignored. FONT NAMES
xtermcontrol accepts any X(7x) FONT NAMES. Font names like '-adobe-courier-medium-r-normal--10-100-75-75-m-60-iso8859-1' are very cumber- some to write, so it is convenient to make use of aliases, e.g. 'fixed' or '8x13', if present in fonts.alias files of the font directo- ries. COLOR NAMES
xtermcontrol accepts any X(7x) COLOR NAMES. Basically this means that colors are specified by name or rgb value, e.g. 'blue', 'rgb:0000/0000/FFFF' or '#00F'. Colors are typically reported by the xterm in a device-dependent numerical form, e.g. 'rgb:0000/0000/FFFF'. Note that old syntax rgb values should always be quoted to avoid '#' being interpreted as the beginning of a comment by the shell (see also FILES). XTERM CONTROL SEQUENCES
The secret behind xtermcontrol is xterm control sequences. All the possible (there are a plethora of them) control sequences are documented in ctlseqs.txt, found in the xterm(1) distribution (see also FILES). TROUBLESHOOTING
If read/write permissions on the tty's are changed so that special group membership is required to be able to write to the pseudo terminal, the easiest workaround is to install xtermcontrol setuid root. Xterm(1) has three resources, allowWindowOps, allowTitleOps, and allowFontOps, that enables or disables special operations which xtermcon- trol relies on. If any of these resources are set (or defaults) to 'false' xtermcontrol may hang. The resources corresponds to xtermcon- trol options as: allowWindowOps: --raise --lower --restore --maximize --iconify --de-iconify --get-title --geometry --get-geometry allowTitleOps: --title allowFontOps: --font --get-font All three resources can usually be enabled for the current xterm session via a menu; ctrl+rightclick and look for menu item names like 'Allow Window Ops'. To set these resource values persistently you can add the following to either your local ~/.Xdefaults file, or to a system-wide resource file like /etc/X11/app-defaults/XTerm: *VT100.allowWindowOps: true *VT100.allowTitleOps: true *VT100.allowFontOps: true FILES
<XRoot>/X11/rgb.txt Default rgb color name file location. ctlseqs.txt Xterm control sequences documentation. Distributed with xterm from http://dickey.his.com/xterm/ SEE ALSO
xterm(1), X(7x) COPYRIGHT
Copyright (C) 2002-2009 Jess Thrysoee <jess@thrysoee.dk> xtermcontrol 2.10 October 17, 2009 XTERMCONTROL(1)
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