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Shell Programming and Scripting

Search for text in files

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# 1  
Old 08-24-2018
Search for text in files
I am working on a script to search for text.

Code:
read -p "Enter text to search for : " n1
grep $n1 /home/andy/bin/*.sh

It works, but if I backspace, it does this.

Code:
Enter text to search for : sset Master^[[D^[[D

------ Post updated at 12:39 PM ------

My mistake is I used the left arrow key instead of backspace. :-)
# 2  
Old 08-24-2018
Two points:
Code:
# double quotes around the pattern - it has spaces
# use frgrep rather than grep to suppress punctuation being misinterpreted as a regex
fgrep "$n1" files*

As to your question: are you on linux using bash? If so readline (not a command, it is a library bash uses) would suppress the garbage. Which can also be due to your terminal settings and your locale as well.

Code:
stty -a

will show your terminal settings.
# 3  
Old 08-24-2018
Yes, I am using bash.

What is this showing me?

Code:
stty -a
speed 38400 baud; rows 33; columns 136; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z;
rprnt = ^R; werase = ^W; lnext = ^V; discard = ^O; min = 1; time = 0;
-parenb -parodd -cmspar cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany -imaxbel iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke -flusho -extproc

# 4  
Old 08-25-2018
I used to play with those back more than 25 years ago when we still had true "dumb" terminal connected to unix servers ( like HP9000s and using multiplexers/muliport RS232 with HP 7XX terminals/consoles ) the speed shows the speed you terminal emulates then you have the sequences that are sent back by your keyboard and what they are affected to etc....
You will still find some of them in your .profile e.g. for setting your erase key:
Code:
stty erase = ^? 
or
stty erase = ^H

# 5  
Old 08-25-2018
The good ole days.

I remember paying around $200 for a 9600 baud modem.

And use it to connect to bulletin board systems or BBSes. :-)


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