On Sun, 5 May 2002 15:07:22 +0300
"Ilia Trendafilov" <[EMAIL PROTECTED]> wrote:
> Zdraveite,
> Kak moga da ubia process pusnat ot programa chrez system()? Ideiata
> e ako procesa ne e grymnal sled niakolko sekundi da se ubiva rychno.
> Zasega edinstvenoto smisleno neshto do koeto uspiah da stigna e
> neshto ot roda
>
> signal(SIGALRM,killchild);
> alarm(3);
> system("wa");
> signal(SIGALRM,SIG_DFL);
Ne ti preporuchvam da polzvash system(), mozesh da beresh jadove. Po dobra realizacia
e fork() - exec(), kato v tozi varian njama da ti se nalozi da pravish evristiki po
koj proces trjabva da streljash s pushkata kill().
>
> Vyprosyt e kakvo tochno da sydyrja procedurata killchild(), taka che
> da ubiva. Ne e zadyljitelno za celta da se izpolzva system(), no tova
> mi se vijda po-prosto ot fork() i exec()-proizvodni funkcii, pyk i
> dori da izpolzvam exec() pak ne moga da se setia za nachin da grymna
> procesa. Pak v syshtia duh - kak moga da ogranicha po niakakyv nachin
> pametta izpolzvana ot vyprosnia child process do niakakvi tvyrdi
> granici naprimer 16MB data size i 1MB stack. Znam za setrlimit(), samo
Viz primera po dolu. Ako v 'ulimit -a' imash njakakvi po malki ogranichenja tova njama
da sraboti (man getrlimit)!
----------------------------
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>
int zzz() {
struct rlimit my_limit;
if (getrlimit(RLIMIT_DATA, &my_limit) != 0) {
/* Error */
return -1;
}
printf("RLIMIT_DATA: %u %u\n", my_limit.rlim_cur, my_limit.rlim_max);
if (getrlimit(RLIMIT_STACK, &my_limit) != 0) {
/* Error */
return -1;
}
printf("RLIMIT_STACK: %u %u\n", my_limit.rlim_cur, my_limit.rlim_max);
}
int xxx() {
struct rlimit my_limit;
my_limit.rlim_cur = 1024 * 16;
my_limit.rlim_max = 1024 * 16;
if (setrlimit(RLIMIT_DATA, &my_limit) != 0) {
/* Error */
return -1;
}
my_limit.rlim_cur = 1024 * 1;
my_limit.rlim_max = 1024 * 1;
if (setrlimit(RLIMIT_STACK, &my_limit) != 0) {
/* Error */
return -1;
}
return 0;
}
int main() {
zzz();
xxx();
zzz();
}
----------------------------
> che (ne mi se smeite :) ne mojah da zacepia kak tochno raboti...
> Blagodaria predvaritelno...
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--
Dimitar Peikov
Programmer Analyst
Globalization Group
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