From: sos@prospect.com.ru (Sergey Okhapkin) Subject: RE: jed update & ksh attempt 16 Jun 1997 02:50:26 -0700 Approved: cygnus.gnu-win32@cygnus.com Distribution: cygnus Message-ID: <01BC7A46.3C1D16D0.cygnus.gnu-win32@gater.krystalbank.msk.ru> Original-To: "gnu-win32@cygnus.com" , "'cgf@bbc.com'" Encoding: 56 TEXT Original-Sender: owner-gnu-win32@cygnus.com Chris Faylor wrote: > > > >> >From the pdksh source: > >> /* Make sure SIGCHLD isn't ignored - can do odd things under SYSV */ > >> setsig(&sigtraps[SIGCHLD], SIG_DFL, SS_RESTORE_ORIG|SS_FORCE); > >> So my guess is in answer to your question probably yes. > > > >"Probably"... I need the exact answer! > > By the way, as far as zsh is concerned, the answer is YES. SIGCHLD is > definitely trapped but appears to not be raised in zsh when a child process > exits. Every cygwin's process makes "kill(ppid, SIGCHLD)" before terminating. Look at _exit() code in dcrt0.cc. I just tried the following code on Linux box: #include main() { sigset_t mask=0; signal(SIGCHLD, SIG_DFL); for(;;) { sigsuspend(&mask); printf("Trap!\n"); } } I ran this program I tried to kill it with SIGCHLD. Sigsuspend() didn't terminates! The following code reports about SIGCHLD delivering: #include void handler(sig) { signal(SIGCHLD, handler); } main() { sigset_t mask=0; signal(SIGCHLD, handler); for(;;) { sigsuspend(&mask); printf("Trap!\n"); } } -- Sergey Okhapkin, http://www.lexa.ru/sos Moscow, Russia Looking for a job. - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".