Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Running shell commands from C/C++
Top Forums Programming Running shell commands from C/C++ Post 302226896 by iamcollins on Wednesday 20th of August 2008 05:57:49 AM
Old 08-20-2008
open should do this
Hello

popen function should do this. You can execute a command using popen function in either read or write mode and the result will be return as a file pointer. You can then read the result from the command using the file pointer as you normally do..

A simple example i got from googling is below
#include <stdio.h>

int main() {
FILE *in;
extern FILE *popen();
char buff[512];

/* popen creates a pipe so we can read the output
of the program we are invoking */
if (!(in = popen("netstat -n", "r"))) {
exit(1);
}

/* read the output of netstat, one line at a time */
while (fgets(buff, sizeof(buff), in) != NULL ) {
printf("Output: %s", buff);
}

/* close the pipe */
pclose(in);
}

Hope this should help you

Regards
Collins
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

running commands from script

I'm new to unix and I have a fairly simple problem: Lets say I am in a specific directory and I run the command: "dirs" , I get an output of all the folders that i pushed into the stack (as expected), buut, when when I create a script (called test): #! /bin/csh dirs and then i run:... (2 Replies)
Discussion started by: owijust
2 Replies

2. Shell Programming and Scripting

Running shell scripts automatically without using Batch or at commands

I have been trying to run a unix script which contains many sql statements.I need to run this script every monday morning. I tried to run on command prompt, it works fine. But while I run it via batch or at command., it returns with library module could not be loaded (libcompat.1.o could not be... (3 Replies)
Discussion started by: ritzwan0
3 Replies

3. UNIX for Advanced & Expert Users

Problem in running bash shell commands on HP-UX machine

Hello All, After login to the server we are explicitly calling /usr/local/bin/bash to activate bash shell properly. But since commands are not executing properly so I think it is not initialized well. I am facing following problems: 1) If I want to have a look on a particular file using tail... (6 Replies)
Discussion started by: abhishek0071
6 Replies

4. Programming

Running UNIX Commands from C

Hi, -How can I get number of files, cpu usage (percentage), memory usage, disk usage, ...etc, using C program ... I can use unix command ( system(command) )but I want the value to be returned back to my C program to use it in my code? How can I do that? Thanks in advance ... (2 Replies)
Discussion started by: zainab
2 Replies

5. Shell Programming and Scripting

Can BASH execute commands on a remote server when the commands are embedded in shell

I want to log into a remote server transfer over a new config and then backup the existing config, replace with the new config. I am not sure if I can do this with BASH scripting. I have set up password less login by adding my public key to authorized_keys file, it works. I am a little... (1 Reply)
Discussion started by: bash_in_my_head
1 Replies

6. Shell Programming and Scripting

Running two commands in background

Hi I want to run two commands in background, i am using below way, but it is not working, i m calling these two commands from one script to another server where below commands are running, in my script ssh is working fine, but command is not going in background, please advise what should i do. ... (10 Replies)
Discussion started by: learnbash
10 Replies

7. Shell Programming and Scripting

Issue with running commands from shell script

I'm trying to copy files from a remote windows server to Unix server. I was successfully able to copy files from windows server using command prompt but when I run these commands from a script it's not working as expected. commands used: sftp user@remoteserver.com lcd local_dir cd... (3 Replies)
Discussion started by: naresh7590
3 Replies

8. Shell Programming and Scripting

Running q-shell commands( on IBM-i Series) from cygwin terminal (on windows)

I have cygwin installed on windows server and when I do echo $SHELL the output is /bin/bash I have created a ssh tunnel from this windows server through cygwin to ibm -i series which is running Q-shell. I am trying to invoke a utility wsadmin (used for scripting) on ibm-i from the... (12 Replies)
Discussion started by: gaurav99
12 Replies

9. Shell Programming and Scripting

Running set of commands in remote servers in shell script

Hi Wishing to all. I am very new joined in an organization as a unix system administrator. I need a help in preparing a script for a report. i have a file contains all of the linux/ubuntu servers line by line around 140 servers. vi servers.txt nh01 nh02 nh03 bh01 bh04 - - :wq (3 Replies)
Discussion started by: kumaraswamy
3 Replies

10. Shell Programming and Scripting

Check status of long running multiple curl commands in shell script

I am working on script. it reads a file which contains multiple lines Ex; curl --write-out %{http_code} --silent --output /dev/null http://hostname:port/input=1 curl --write-out %{http_code} --silent --output /dev/null http://hostname:port/input=2 curl --write-out %{http_code} --silent ... (2 Replies)
Discussion started by: oraclermanpt
2 Replies

LEARN ABOUT V7

uux

UUX(1C) 																   UUX(1C)

NAME

       uux - unix to unix command execution

SYNOPSIS

       uux [ - ] command-string

DESCRIPTION

       Uux will gather 0 or more files from various systems, execute a command on a specified system and send standard output to a file on a spec-
       ified system.

       The command-string is made up of one or more arguments that look like a shell command line, except that the command and file names  may	be
       prefixed by system-name!.  A null system-name is interpreted as the local system.

       File names may be one of(1) a full pathname;

	      (2) a pathname preceded by ~xxx; where xxx is a userid on the specified system and is replaced by that user's login directory;

	      (3) anything else is prefixed by the current directory.

       The `-' option will cause the standard input to the uux command to be the standard input to the command-string.

       For example, the command

	      uux "!diff usg!/usr/dan/f1 pwba!/a4/dan/f1 > !fi.diff"

       will get the f1 files from the usg and pwba machines, execute a diff command and put the results in f1.diff in the local directory.

       Any  special  shell characters such as <>;| should be quoted either by quoting the entire command-string, or quoting the special characters
       as individual arguments.

FILES

       /usr/uucp/spool - spool directory
       /usr/uucp/* - other data and programs

SEE ALSO

       uucp(1)
       D. A. Nowitz, Uucp implementation description

WARNING

       An installation may, and for security reasons generally will, limit the list of commands executable on behalf of an incoming  request  from
       uux.  Typically, a restricted site will permit little other than the receipt of mail via uux.

BUGS

       Only the first command of a shell pipeline may have a system-name!.  All other commands are executed on the system of the first command.
       The use of the shell metacharacter * will probably not do what you want it to do.
       The shell tokens << and >> are not implemented.
       There is no notification of denial of execution on the remote machine.

																	   UUX(1C)
All times are GMT -4. The time now is 01:08 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy