--- Begin Message ---
Hi Sandeep,
Could you forward my reply to 'kernelnewbies@xxxxxxxxxxxx' and 'Yasmine
Habib'?
This mail may not reach them because of firewall settings.
/****************************************************/
// Below is the example of executing shell command
// "cat > /proc/iomem" from application
//
/****************************************************/
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
int main(void)
{
int fd_exec;
char *const arg_list[]= {
"cat",
"/proc/iomem",
NULL
};
if(fork() == 0)
{
/*** Please note below 3 statements can be replaced by the above two
statements viz close(1) & open(...) ***/
fd_exec = open("/tmp/iomemdump", O_CREAT | O_WRONLY );
dup2(fd_exec,1);
close(fd_exec);
execvp("/bin/cat",arg_list);
}
printf("Hello\n");
return 0;
}
Regards,
Sachin Rane
-----Original Message-----
From: kernelnewbies-bounce@xxxxxxxxxxxx
[mailto:kernelnewbies-bounce@xxxxxxxxxxxx]On Behalf Of Sandeep
Sent: Monday, May 09, 2005 10:07 PM
To: Yasmine Habib
Cc: kernelnewbies@xxxxxxxxxxxx
Subject: Re: How to use a shell command in an application?
Yasmine Habib wrote:
>How can i use a shell command inside a program or application? in
>other words, i am writing a small scheduler that needs to get the
>current cpu usage/utliization of a processor at a certain time. using
>"top", "free", "vmstat" provide me with required information but just
>as a display when used as a shell command. i need the code to be
>written inside my scheduler.
>
>
You can try it out with the system( ) call. This will give you the
flexibility to run any command that u can run in the shell.
sandeep
>Thank you
>
>--
>Kernelnewbies: Help each other learn about the Linux kernel.
>Archive: http://mail.nl.linux.org/kernelnewbies/
>FAQ: http://kernelnewbies.org/faq/
>
>
>
>
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FAQ: http://kernelnewbies.org/faq/
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