[C++] using a system call

[StOoZ]

when I do this :

system("wget http://www.somesite/txt.html")

how can I check when the file is fully downloaded??

[Zugzwang]

Try to find out if you can obtain the return value of wget somehow.

Second possibility: Execute that program using popen(...) and parse its output to look for a success message.

[amo-ej1]

man system will tell you:



RETURN VALUE
The value returned is -1 on error (e.g. fork(2) failed), and the
return status of the command otherwise. This latter return status is
in the format specified in wait(2). Thus, the exit code of the command
will be WEXITSTATUS(status).


Easy as that thus



int ret = system("my_magical_command");
if(WEXITSTATUS(ret)==0)
{
printf("Everybody is happy now\n");
}

[cmay]

i am seaching trough inet.h trying to find a routine already writtten for this. but this is how i would have done.do not know if it helps at all.

#include<stdio.h>
#include<stdlib.h>
int main(int argc,char **argv)
{

if(system("wget http://start.ubuntu.com/8.04/")==0)
{
printf("ok\n");
/* insert a file rutine that checks if file exist and do something with file here*/

}
else printf("not ok\n");
/* return error message instead*/
return 0;
}

[StOoZ]

cool folks!! thanks a lot!
btw , eventually I decided to use libcurl for that , the reason : since im quite new to C++ , i want to learn how to use more libs , even though libcurl is C.

thanks!