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Full Discussion: Searching invalid character in list of client name
Top Forums Shell Programming and Scripting Searching invalid character in list of client name Post 302922822 by Aia on Tuesday 28th of October 2014 01:20:57 PM
Old 10-28-2014
grep [^[:alnum]&] client.txt is incorrect for various reasons.
You are missing a colon at the end of alnum, before ]; to make it an alphanumeric class set
[:alnum:] Search some more for it if you want to know what that set would include.
The [^] means exclude the following
The & has to be escaped or protected, since it has special meaning for the shell

In English, it says to grep:
search in the file client.txt for any character that is not an alphanumeric or an ampersand.

Therefore it would show:
Code:
# single quotes to protect the & from the shell
grep '[^[:alnum:]&]' client.txt
pallvi mahajan # shows because there is a space
Sunny Sapen   # same as above
F.K.S enterprise # it shows because periods and space
London & university # it shows because spaces
Banker's & Banker # it shows because spaces and (')
Kapil/ yadav # it shows because (/) and space

Let's add spaces into the exclusion class set
Code:
# there is a space inside the outer [] before &
grep '[^[:alnum:] &]' file
F.K.S enterprise # this shows now because the (.)
Banker's & Banker # this shows because (')
Kapil/ yadav #this shows because (/)

Let's exclude the (') from the list of wanted. Since (') has special meaning for the shell we have to change the quoting scheme that we use.
Code:
# \' and \& will do it
grep "[^[:alnum:] \'\&]" 
F.K.S enterprise
Kapil/ yadav

I think this should be enough, now, to understand and figure out what you must do. Take another look at RudiC's initial exclusion class set.
Last edited by Aia; 10-28-2014 at 02:34 PM..
 

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LEARN ABOUT NETBSD

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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