I don't know if someone has done sometime a MS Excel Macro, that allows us to press F8 over the code
to see step by step, to mention something, how is running the code, which values take the variables,
if some loop is executing correct or where a error occurs, and some other debugging actions.
Is there some way/application to run a shell script (bash, awk, sed etc) similarly, step by step?
For shell,you can use set -x as first line or magic cookie (#!/bin/bash -x), then execute the script to see it's flow.
Awk you can debug by printing inside the code and observing awk's warnings and errors during execution.
Sed well, i have no idea
Thanks both, I've tested using the code below and error messages are the same if I use set -x or not.
*This code contains a syntax error in if statement
Besides that, is not possible to execute the script line by line to see how the code works, even when the code has no error?
Because it could be only a bad algorithm and not syntax errors.
Of course the error is the same; the code hasn't changed after all...
Unlike an IDE though, a shell does not have total control of its environment, meaning, debugging could cause radically different behavior (input meant for the script ending up in the 'wait till enter for next line' function, etc.) You're trying to build an IDE out of a shell.
From time to time I do Excel macros and shell scripts, in both scenarios, by far I'm not an expert, but in Excel using that feature,
for instance, I can find the errors faster and/or improve a bad loop.
I only was wondering if in shell that feature exists because I know even less than Excel Macros and I need more
time to find where the error is, or how to know how it goes the code even it has no errors.
Shells just don't work that way for a whole bunch of reasons. Not being exactly the same as another language you've used doesn't make it broken or incomplete.
Like learning any other language, you'll have to learn new habits, new methods, and new tools.
You can put a read statement most anywhere you want to make the shell wait for you to hit ENTER for instance.
FYI,
I'm slowly removing a lot of the bold font-styles from titles of discussions, forum titles, etc
I'm not removing bold for the entire site because we do need bold from time to time, especially in posts and sometimes in other places.
However, the original forum style had way too much... (3 Replies)
Thank all of you.
May you explain step by step where and how I will add pseudo code
Note : I have Linux 2.6.24-26-server on x86_64
dears kindly help me (3 Replies)
Hi all.
This may be a stupid question but here goes:
I lost a disk on my Sun-Fire 480-r and want to replace it. I don't care about the data, I just need to get a new disk in.
Can anyone supply me with step by step procedure please. I am not an expert by any means and it is a dev box so I... (1 Reply)
Hello all
i was searching the net for simple but effective tutorial to show me how debug c++ in emacs with not much luck.
im not new to unix but new to emacs , i looking for tutorial that
shows how to debug ( if possible ) c++ programs .
LIike IDE suppose to , break points step in/out variable... (0 Replies)
Hi all,
The following script is fine when I work via command line
m=1
c=0
while
do
echo $m
gnokii --getsms IN $m > out.txt;
m=`expr $m + 1`;
cat out.txt >> message_log;
############
read first crap< <(sed -n '/Text:/{n;p;}' out.txt);
read message< <(sed -n '/Text:/{n;p;}'... (2 Replies)
I am new to unix and server at my job crashed due to hardware problem. I'm now opted to install sco unix on a new server - could anybody help me with the steps I need to take (pretty old machine)
Thanks & Regards
Nancy :( (0 Replies)
HI
I am new to unix and need to install sco unix on a new server - could anybody help me with the steps I need to take - the hd is a 9gb scsi drive (pretty old machine)
Thanks (1 Reply)