Here is another powerful example of how a correctly set up background
process can fetch a web page for you.
Using URL_encode() you can even invoke specific scripts on a remote host
via HTTP and HTTPS protocol using CURL (available on stock Angstrom but
remember to connect it to the inet).
[code]
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <dirent.h>
main()
{
int ppid;
int status;
FILE *fptr;
char c;
remove("woody.txt");
printf("Reading the HTML source from Stanford Systems...\n");
fflush(NULL);
if ((ppid=fork())==0)
{
printf("Child process\n");
execlp("bash","bash","./ecurl.sh","",NULL);
return; //terminates child process
}
//does this block? YES!
// printf("Parent process %d\n",ppid);
wait(&status);
fptr=fopen("woody.txt","r");
printf("\n\nSource code of Woody's home page.\n\n");
while(!feof(fptr))
{
fread(&c,1,1,fptr);
printf("%c",c);
}
fclose(fptr);
}
[/code]
Again requires a short shell script to do the actual operation. In this
case, put the following shell scripting into "ecurl.sh":
[code]
curl -k http://wodystanford.wordpress.com > ./woody.txt
sleep 1
exit
[/code]
make executable, and compile C portion and execute as in the previous
example.
On Saturday, February 25, 2017 at 10:44:53 PM UTC-7, woody stanford wrote:
>
> Here is how you do the background process thing on a Beagle, even stock.
>
> https://www.raspberrypi.org/forums/viewtopic.php?f=33&t=175567
>
> A claim.
>
--
For more options, visit http://beagleboard.org/discuss
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