Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: I am not able to use variables in system command in a C program
Top Forums UNIX for Dummies Questions & Answers I am not able to use variables in system command in a C program Post 302760455 by dhanda2601 on Thursday 24th of January 2013 04:37:39 AM
Old 01-24-2013
Linux I am not able to use variables in system command in a C program
this method is not working.I am having a problem to use variables in system command. i cannot use the variables in system command.
this how i was did
Code:
system("whereis command");

this method works very fine. but, i want use the commands as variable.
that means i want only pass the variables.
like this
Code:
scanf("%s",variable);
system("whereis variable");

but,
Last edited by Scott; 01-24-2013 at 07:08 AM.. Reason: Code tags
 

10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Dump program variables

Hi, Wish if could provide some clues. How do I dump all the C program variables(global) into say a file with their names and the values. So that when I restart the application again I could use this same file for reinitializing.Is this possible? Thanks, Reji (1 Reply)
Discussion started by: rejise
1 Replies

2. UNIX for Dummies Questions & Answers

Dummie: How do I get variables mid program

I'm writing a simple program in unix and was wondering how mid switch I can run a program and get someone to enter variables for it i.e.: #!/bin/csh -f echo "If you wish to do v press v" echo "If you wish to compile press c" echo "If you wish to add an entry press a" echo "If you wish to... (1 Reply)
Discussion started by: RichardB
1 Replies

3. Shell Programming and Scripting

Passing shell variables to awk program..

Hello, Can we pass shell variables like $PATH etc. to a awk program part for example, awk ' { fieldValue=$PATH .... }' file (1 Reply)
Discussion started by: Vishnu
1 Replies

4. Programming

using system cp command in C program

Hi i used the following code to copy a directory from a source location to dest. argv contains the source loc i/p by the user. strcpy(source,argv); strcpy(dest,"/home/MainServer/Job_dir/"); system("cp -r $source $dest"); it complies properly but during execution of the program it... (2 Replies)
Discussion started by: mridula
2 Replies

5. Shell Programming and Scripting

How to access the C program variables in shell script

hi I wanted to access the C program variables in shell script. This script is called from the same C program. What are the ways in which i can access variables thankx (3 Replies)
Discussion started by: bhakti
3 Replies

6. Shell Programming and Scripting

problem accessing Multiple Variables from C Program to a Shell script

program name--test #!/bin/bash output1=`/home/user/a.c` output2=`/home/user/a.c` k=`$output1 + 1` m=`$output2 + 1` echo $k echo $m --------------------------------------------------------------------------- prgram name--a.c #include<stdio.h> int main() (1 Reply)
Discussion started by: sameworld1980
1 Replies

7. UNIX for Dummies Questions & Answers

Script to open program and send/execute command in program

Hi, i want to write a script that executes a program (exec?) . this program then requires a filename as input. how do i give it this input in the script so the program will be complete run and close by the script. e.g. exec prog.exe program then asks for filename "enter filename:"... (1 Reply)
Discussion started by: tuathan
1 Replies

8. UNIX for Dummies Questions & Answers

Small Program with variables

Hello Geniuses of the unix world. please help, stupid chemist. I have the following script that I need to create a file. Doesnt make sense unless i explain this way: I need to create a file called summary.in I would like all these lines to be inserted however in the command line I would like the... (1 Reply)
Discussion started by: gingburg
1 Replies

9. UNIX Desktop Questions & Answers

Knowing the size and location of variables in a C program

So I need some help with this. Pardon me if I'm posting in the wrong forum, after some googling for my answer and finding nothing I found this forum. It seemed appropriate for what I was seeking. I just didnt find a forum that concerned the use of GDB. I'm learning to use the C language and GDB.... (2 Replies)
Discussion started by: Cambria
2 Replies

10. Shell Programming and Scripting

Using env variables to run a program

Hi there, I need urgent help with a small program that is run via shell script. Unfortunately I only understand the bare basics of shell scripting and can't figure out how to do this. We have a program that tests the connection between 3 servers. I have a script that lets the program run on... (15 Replies)
Discussion started by: Pherdinand
15 Replies

LEARN ABOUT DEBIAN

irsend

IRSEND(1)							   User Commands							 IRSEND(1)

NAME

       irsend - basic LIRC program to send infra-red commands

SYNOPSIS

       irsend [options] DIRECTIVE REMOTE CODE [CODE...]

DESCRIPTION

       Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such
       as TV boxes, HiFi sets, etc.

       DIRECTIVE can be:
	  SEND_ONCE	    - send CODE [CODE ...] once
	  SEND_START	    - start repeating CODE
	  SEND_STOP	    - stop repeating CODE
	  LIST		    - list configured remote items
	  SET_TRANSMITTERS  - set transmitters NUM [NUM ...]
	  SIMULATE	    - simulate IR event

       REMOTE is the name of a remote, as described in the lircd configuration file.

       CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file.

       NUM is the transmitter number of the hardware device.

       For the LIST DIRECTIVE, REMOTE and/or CODE can be empty:

	  LIST	 ""    ""   - list all configured remote names
	  LIST REMOTE  ""   - list all codes of REMOTE
	  LIST REMOTE CODE  - list only CODE of REMOTE

       The SIMULATE command only works if it has been explicitly enabled in lircd.

       -h --help
	      display usage summary

       -v --version
	      display version

       -d --device
	      use given lircd socket [/var/run/lirc/lircd]

       -a --address=host[:port]
	      connect to lircd at this address

       -# --count=n
	      send command n times

EXAMPLES

	  irsend LIST DenonTuner ""
	  irsend SEND_ONCE  DenonTuner PROG-SCAN
	  irsend SEND_ONCE  OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP
	  irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3
	  irsend SEND_STOP  OnkyoAmpli VOL-DOWN
	  irsend SET_TRANSMITTERS 1
	  irsend SET_TRANSMITTERS 1 3 4
	  irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S"

FILES

       /etc/lirc/lircd.conf
	      Default lircd configuration file.  It should contain all the remotes, their infra-red codes and the corresponding timing	and  wave-
	      form details.

DIAGNOSTICS

       If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics:
       "irsend: could not connect to socket"
       "irsend: Connection refused" (or "Permission denied").

SEE ALSO

       The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory.

       lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org.

irsend 0.9.0-pre1						   October 2010 							 IRSEND(1)
All times are GMT -4. The time now is 02:18 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy