Hi!
I have a programm with code like this (this is example, the real code is
at
http://fresh.t-systems-sfr.com/linux/src/.warix/logserial-0.4.2.tar.gz.html):
####################
void shutdown(int sig) {
switch (sig) {
default:
fprintf(stderr, "Got signal %d. Exit\n", sig);
break;
}
exit(EXIT_SUCCESS);
}
int main(void) {
chproc = fork();
if (chproc == -1) {
perror("Unable to fork");
exit(EXIT_FAILURE);
}
if (chproc != 0) {
fprintf(stderr, "Starting daemon...\n");
exit(EXIT_SUCCESS);
}
signal(SIGHUP, &shutdown);
signal(SIGINT, &shutdown);
signal(SIGQUIT, &shutdown);
signal(SIGTERM, &shutdown);
signal(SIGABRT, &shutdown);
while (1) {
sleep(1);
}
return 0;
}
####################
When I load a.out from terminal it run fine.
I want this programm run at every boot so I place this command in
/etc/rc.local or /usr/local/etc/rc.d/prog.sh.
After boot it not run and in logs I see message "Got signal 1. Exit".
Any ideas?
Andris
andris@multicom.lv wrote:
> I have a programm with code like this (this is example, the real code is
> at
>
http://fresh.t-systems-sfr.com/linux/src/.warix/logserial-0.4.2.tar.gz.html):
> [...]
> When I load a.out from terminal it run fine.
> I want this programm run at every boot so I place this command in
> /etc/rc.local or /usr/local/etc/rc.d/prog.sh.
> After boot it not run and in logs I see message "Got signal 1.
Exit".
A fork() is not sufficient to become a daemon. You also
have to detach the process from the controlling terminal
and other things. See Stevens APUE book for much more
details.
I'd recommend that you use the daemon(3) function. It
does all of that for you. Please refer to the manpage.
Regards
Oliver
--
Oliver Fromme, secnetix GmbH & Co KG, Oettingenstr. 2, 80538 M?nchen
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and may not necessarily reflect the opinions of secnetix in any way.
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and complex tasks impossible."
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