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Stick up your best shell scripts
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Ah, shell scripting, sounds daunting, but its a very useful & powerful thing
Here's one I was messing around with a long time ago, on Ubuntu 6.10, I actually haven't messed around (with scripts) since then TBH.
Its to do with the 'FIND' command.
The 'xdev' lets me just search the local drive/linux partition.
This version was one of my first attempts, I did modify it to suit my needs later.
#!/bin/sh
echo clear
echo "Enter 1 for Word-Find program:"
echo "Enter 2 for File-Find program:"
read a
if [ "$a" -eq "1" ]
then
echo "Enter search WORD:"
read w
echo "Enter /path/file to search:"
read p
# insensitive search, recursive, show only file name
grep -irl $w $p
elif [ "$a" -eq "2" ]
then
echo "Enter search FILE:"
read f
echo "Enter /path/ to search:"
read pa
find $pa -xdev -type f -iname $f
else
echo "Wrong choice !"
fi
exit $?0 -
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I present a little app I came up with while messing around with conky. As you may know, that involves editing a file, running conky, killing it from the gnome-system-monitor, then editing agian.. It gets tedious. So, I wrote this perl script that acts like the "kill" command, but based on process name, not PID.
#!/usr/bin/perl #Kill the process named as the first argument. my $doomed = @ARGV[0]; #get the name of the process open (FILE, ">processes.txt") or die($!); print (FILE `ps -e`); #get list of processes close FILE,open (FILE, "<processes.txt") or die($!); foreach(<FILE>){ if (/$doomed/){ #find line with the selected process /(.*?)\s/; #get the PID print"Killing $doomed with a PID ". "of $1..\n"; $pid = $1; #the PID @args= ("kill","$pid"); $status = system(@args);#try to kill and capture #exit status if ($status eq "0"){ print "Killed.\n"; exit;#end the program }else{ die("Unable to kill $doomed.\n"); } } } #only way to get here is to not have died- meaning the if statement #was never entered, hence: print "No process named $doomed found currently running.\n";And some sample output:karlreid@karlreid-laptop:~$ killthis conky Killing conky with a PID of 24584.. Killed. karlreid@karlreid-laptop:~$
It can kill root processes too(obviously, be careful):
karlreid@karlreid-laptop:~$ sudo conky [sudo] password for karlreid: Conky: /home/karlreid/.conkyrc: 7: config file error Conky: use_spacer should have an argument of left, right, or none. 'yes' seems to be some form of 'true', so defaulting to right. Conky: diskio device '19' does not exist Conky: forked to background, pid is 24749 karlreid@karlreid-laptop:~$ Conky: desktop window (10000b4) is subwindow of root window (13b) Conky: window type - normal Conky: drawing to created window (3200001) Conky: drawing to double buffer karlreid@karlreid-laptop:~$ killthis conky Killing conky with a PID of 24749.. Unable to kill conky. karlreid@karlreid-laptop:~$ sudo ~/bin/killthis conky Killing conky with a PID of 24749.. Conky: received SIGINT or SIGTERM to terminate. bye! Killed. karlreid@karlreid-laptop:~$
karlreid@karlreid-laptop:~$ killthis nonexistentprocess No process named nonexistentprocess found currently running. karlreid@karlreid-laptop:~$
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This is really the only proper shell script I ever scripted. It worked in Ubuntu 9.04 for me. Apologies if its crap and if youve any criticism hit me with it
This script takes a C++ source file, compiles it, and then runs it. It works under a strictish naming convention. The source file is $1.cpp and then the output is $1.
Any further parameters will be passed onto the program. Example:
$ ./cr.sh helloWorld "param 1" "param 2"
This will compile ./helloWorld.cpp to ./helloWorld using g++, then run
$ ./helloWorld "param 1" "param 2"
If the source code is older than the compiled code, that is to say the source hasnt been updated since the last compile, then it skips compiling and just runs the compiled file. Handy for testing through terminal (which is how Im learning C++)#!/bin/sh #Script to compile and run C++ source file # ./cr.sh [source filename without .cpp extension] [arguments to be passed to compiled program] #Check if file exists if [ ! -e "$1.cpp" ] then echo "Error: $1.cpp not a file!" exit 1 fi #Does program file exist? If not compile. if [ ! -e "$1" ] then g++ ./$1.cpp -o $1 else #Has source been modified since last compile? If so compile if test $(stat --format=%Y $1) -lt $(stat --format=%Y $1.cpp) then g++ ./$1.cpp -o $1 fi fi #Grab arguementes to pass to C++ program TEMP=`echo $* | awk '{print substr( $0, index($0," ")+1, length($0)-index($0," ")+1 ) }'` if [ ! -e $2 ] then ./$1 $TEMP else ./$1 fi
Any comments such as better error handling will be really appreciated 0
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