Sponsored Content
Top Forums Shell Programming and Scripting Running an executable from bash prompt Post 302797873 by oahmad on Tuesday 23rd of April 2013 10:33:51 AM
Old 04-23-2013
Guys, thanks for your help. I'm a complete newbie as shell-scripting. I'm using the cygwin shell to control custom c-drivers running in windows for data-acquisition modules...Anyways, so I tried the solution suggested by @elixir_sinari and it worked. I don't understand why it works, i.e. why the single quotes and why I need to use eval. More broadly, though, I'm trying to understand what @alister is suggesting. This var2 variable is actually part of a script file that I'm developing, it contains the path to my c-driver executable. I'm utilizing this path in a lot of places in my code. Since I may change this location later, I wanted to store it in a variable that can easily be modified later. What is the alternative to this?

Now, further along in my scripting, I have another issue and it is as follows:
I have 3 variable declared
Code:
handle=2
digPath="/'cygdrive/c/2i/test fixture/software/mccdaqtest/debug/Dig'"

if I do
Code:
var2="$digPath $handle"
echo $var2

I get
Code:
/'cygdrive/c/2i/test fixture/software/mccdaqtest/debug/Dig' 2

so far, so good.
but if I do:
Code:
var2="$digPath $handle config"
echo $var2

then I get this:
Code:
configive/c/2i/test fixture/software/mccdaqtest/debug/Dig' 0

What the dicken's is going on here? Why is my line being overwritten by config
. At first I thought there was a limit to the number of characters per line in bash, but I did google on and found getconf ARG_MAX which returns 32000, so that isn't the issue.
 

10 More Discussions You Might Find Interesting

1. Programming

Running an executable file

I've created a c program and compiled it with gcc, in unix. The file name is abc.c and it is run by typing the command ./abc I have another program which creates a child process, and I need this abc program to run on that child process. I've tried execvp(), but it doesn't work. How can I run... (2 Replies)
Discussion started by: sdsd
2 Replies

2. Shell Programming and Scripting

Invoking CGI executable after setenv (in bash)

Hello, I have an executable cgi program that I can run manually from my Linux shell after setting environmental variables on the previous line, like this: setenv QUERY_STRING "workdir=/u/here/there/&nb1=5&nb2=1000" MyExecutable.cgiHow can I imitate this behavior in a bash script? I tried... (11 Replies)
Discussion started by: aplaydoc
11 Replies

3. UNIX for Dummies Questions & Answers

running command prompt executable file in shell script

hi i have file extentioned with test.vbs. i am able to run this file n execute through command promt but i dont know how to run in shell script example: file name is test.vbs which contains strSoundFile = "C:\windows\Media\Notify.wav" Set objShell = CreateObject("Wscript.Shell") strCommand... (5 Replies)
Discussion started by: atl@mav
5 Replies

4. UNIX for Advanced & Expert Users

How to stop direct running of executable

Dear Sir, I am using CentOS-5.2(64-bit) as an server side OS in a cluster with 32 slaves+1 Master. My question is, after compiling a file with ifort, I am suppose to get a executable(say a.out). I want my users to do ssh slave.local and then do ./a.out But is it possible to restrict... (0 Replies)
Discussion started by: snbanerjee
0 Replies

5. UNIX for Dummies Questions & Answers

Running Executable in Bash Script

Hey guys, so I've been trying to write a bash script called runSorter.sh that runs an executable that also takes in some parameters and outputs the results to a text file. The executable, sorter, takes in a number parameter. I want to make it so that you can input as many number parameters into... (4 Replies)
Discussion started by: Duo11
4 Replies

6. UNIX for Dummies Questions & Answers

Problem running executable with ./

Hey all, I'm trying to execute a program and despite it appearing to be there, I keep getting this: -bash: ./aisdispatcher: No such file or directoryTo run it, I'm going into the directory where it is stored and running ./aisdispatcher...the result of which should just be a listing of options... (10 Replies)
Discussion started by: pmd006
10 Replies

7. Shell Programming and Scripting

How to create an executable bash script for these commands?

I wish to create an executable bash script that will run the following commands as root, that is, using sudo su iptables-save | awk '/^ / { print $1 } /^:+ / { print $1 " ACCEPT" ; } /COMMIT/ { print $0; }' | iptables-restoreMy first attempt at bash... (9 Replies)
Discussion started by: thixeqi
9 Replies

8. Shell Programming and Scripting

Making bash script allways executable when transfer ?

Does it possible to make some bash script automatic to be a executable when transfered to another pc...? (5 Replies)
Discussion started by: tomislav91
5 Replies

9. Shell Programming and Scripting

Bash script make itself executable

Is there a way to make this make itself executable? Thanks. :-) cat > somescript.sh << \EOF #!/bin/bash block_count=$(sudo tune2fs -l /dev/sda1 | awk '/^Block count:/ {print $NF}') reserved_block_count=$(sudo tune2fs -l /dev/sda1 | awk '/^Reserved block count:/ {print $NF}') perl -e... (4 Replies)
Discussion started by: drew77
4 Replies

10. Shell Programming and Scripting

[Bash] passing variables to executable doesn't work

Bash version 4.4.20 / Ubuntu 16.0.4 Hello, I tried to write a script that gathers some data and passes them to an executable. The executed application answers with an error. The echo output in the script returns correct values. If I copy/paste the last echo command, it get's executed... (2 Replies)
Discussion started by: sushi2k7
2 Replies
LIBBASH(7)							  libbash Manual							LIBBASH(7)

NAME
libbash -- A bash shared libraries package. DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may want to load and use in scripts of your own. It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries. Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded using ldbash(1) must answer 4 requirments: 1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash). 2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library exports. I.e. all the function that will be usable after loading that library will be listed in that line. 3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are required for our library. I.e. every bash library that is in use in our bash library must be listed there. 4. The library must be listed (For more information, see ldbashconfig(8)). Basic guidelines for writing library of your own: 1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions. 2. Try to declare all variables intended for internal use as local. 3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with: __<library_name>_ For example, internal function myfoosort of hashstash library should be named as __hashstash_myfoosort This helps to avoid conflicts in global name space when using libraries that come from different vendors. 4. See html manual for full version of this guide. AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <ril@ran4.net> SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1) Linux Epoch Linux
All times are GMT -4. The time now is 12:41 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy