Linux SysTem

typedef void (*sighandler_t)(int);

int jh_system(const char *cmd_line)

{

   int ret = 0;

   sighandler_t old_handler;

   old_handler = signal(SIGCHLD, SIG_DFL);

   ret = system(cmd_line);

   signal(SIGCHLD, old_handler);

   return ret;

}

or

if (signal(SIGCHLD, SIG_IGN) == SIG_ERR) {

return -1;

} else {

return 0;

}

or

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