/*++ /* NAME /* killme_after 3 /* SUMMARY /* programmed death /* SYNOPSIS /* #include <killme_after.h> /* /* void killme_after(seconds) /* unsigned int seconds; /* DESCRIPTION /* The killme_after() function does a best effort to terminate /* the process after the specified time, should it still exist. /* It is meant to be used in a signal handler, as an insurance /* against getting stuck somewhere while preparing for exit. /* DIAGNOSTICS /* None. This routine does a best effort, damn the torpedoes. /* LICENSE /* .ad /* .fi /* The Secure Mailer license must be distributed with this software. /* AUTHOR(S) /* Wietse Venema /* IBM T.J. Watson Research /* P.O. Box 704 /* Yorktown Heights, NY 10598, USA /*--*/ /* System library. */ #include <sys_defs.h> #include <signal.h> #include <unistd.h> /* Utility library. */ #include <killme_after.h> /* killme_after - self-assured death */ void killme_after(unsigned int seconds) { struct sigaction sig_action; /* * Schedule an ALARM signal, and make sure the signal will be delivered * even if we are being called from a signal handler and SIGALRM delivery * is blocked. */ alarm(0); sigemptyset(&sig_action.sa_mask); sig_action.sa_flags = 0; sig_action.sa_handler = SIG_DFL; sigaction(SIGALRM, &sig_action, (struct sigaction *) 0); alarm(seconds); sigaddset(&sig_action.sa_mask, SIGALRM); sigprocmask(SIG_UNBLOCK, &sig_action.sa_mask, (sigset_t *) 0); }