int main (int argc, char const *const *argv)
{
iopause_fd x[2] = { { -1, IOPAUSE_READ, 0 }, { -1, IOPAUSE_READ, 0 } } ;
PROG = "s6-svscan" ;
{
subgetopt_t l = SUBGETOPT_ZERO ;
unsigned int t = 5000 ;
for (;;)
{
register int opt = subgetopt_r(argc, argv, "t:c:", &l) ;
if (opt == -1) break ;
switch (opt)
{
case 't' : if (uint0_scan(l.arg, &t)) break ;
case 'c' : if (uint0_scan(l.arg, &max)) break ;
default : strerr_dieusage(100, USAGE) ;
}
}
argc -= l.ind ; argv += l.ind ;
if (t) tain_from_millisecs(&defaulttimeout, t) ;
else defaulttimeout = tain_infinite_relative ;
if (max < 2) max = 2 ;
}
/* Init phase.
If something fails here, we can die, because it means that
something is seriously wrong with the system, and we can't
run correctly anyway.
*/
if (argc && (chdir(argv[0]) < 0)) strerr_diefu1sys(111, "chdir") ;
x[1].fd = s6_supervise_lock(S6_SVSCAN_CTLDIR) ;
x[0].fd = selfpipe_init() ;
if (x[0].fd < 0) strerr_diefu1sys(111, "selfpipe_init") ;
if (sig_ignore(SIGPIPE) < 0) strerr_diefu1sys(111, "ignore SIGPIPE") ;
{
sigset_t set ;
sigemptyset(&set) ;
sigaddset(&set, SIGCHLD) ;
sigaddset(&set, SIGALRM) ;
sigaddset(&set, SIGTERM) ;
sigaddset(&set, SIGHUP) ;
sigaddset(&set, SIGQUIT) ;
sigaddset(&set, SIGABRT) ;
sigaddset(&set, SIGINT) ;
sigaddset(&set, SIGUSR1) ;
if (selfpipe_trapset(&set) < 0) strerr_diefu1sys(111, "trap signals") ;
}
{
struct svinfo_s blob[max] ; /* careful with that stack, Eugene */
services = blob ;
tain_now_g() ;
/* Loop phase.
From now on, we must not die.
Temporize on recoverable errors, and panic on serious ones. */
while (cont)
{
int r ;
tain_add_g(&deadline, &defaulttimeout) ;
reap() ;
scan() ;
killthem() ;
r = iopause_g(x, 2, &deadline) ;
if (r < 0) panic("iopause") ;
else if (!r) wantscan = 1 ;
else
{
if ((x[0].revents | x[1].revents) & IOPAUSE_EXCEPT)
{
errno = EIO ;
panic("check internal pipes") ;
}
if (x[0].revents & IOPAUSE_READ) handle_signals() ;
if (x[1].revents & IOPAUSE_READ) handle_control(x[1].fd) ;
}
}
/* Finish phase. */
selfpipe_finish() ;
killthem() ;
reap() ;
}
{
char const *eargv[3] = { FINISH_PROG, finish_arg, 0 } ;
execve(eargv[0], (char **)eargv, (char *const *)environ) ;
}
panicnosp("exec finish script " FINISH_PROG) ;
}
int main (int argc, char const *const *argv)
{
iopause_fd x[2] = { { -1, IOPAUSE_READ, 0 }, { -1, IOPAUSE_READ, 0 } } ;
PROG = "s6-supervise" ;
if (argc < 2) strerr_dieusage(100, USAGE) ;
if (chdir(argv[1]) < 0) strerr_diefu2sys(111, "chdir to ", argv[1]) ;
{
register unsigned int proglen = str_len(PROG) ;
register unsigned int namelen = str_len(argv[1]) ;
char progname[proglen + namelen + 2] ;
byte_copy(progname, proglen, PROG) ;
progname[proglen] = ' ' ;
byte_copy(progname + proglen + 1, namelen + 1, argv[1]) ;
PROG = progname ;
if (!fd_sanitize()) strerr_diefu1sys(111, "sanitize stdin and stdout") ;
x[1].fd = s6_supervise_lock(S6_SUPERVISE_CTLDIR) ;
if (!ftrigw_fifodir_make(S6_SUPERVISE_EVENTDIR, getegid(), 0))
strerr_diefu2sys(111, "mkfifodir ", S6_SUPERVISE_EVENTDIR) ;
x[0].fd = selfpipe_init() ;
if (x[0].fd == -1) strerr_diefu1sys(111, "init selfpipe") ;
if (sig_ignore(SIGPIPE) < 0) strerr_diefu1sys(111, "ignore SIGPIPE") ;
{
sigset_t set ;
sigemptyset(&set) ;
sigaddset(&set, SIGTERM) ;
sigaddset(&set, SIGHUP) ;
sigaddset(&set, SIGQUIT) ;
sigaddset(&set, SIGCHLD) ;
if (selfpipe_trapset(&set) < 0) strerr_diefu1sys(111, "trap signals") ;
}
if (!ftrigw_clean(S6_SUPERVISE_EVENTDIR))
strerr_warnwu2sys("ftrigw_clean ", S6_SUPERVISE_EVENTDIR) ;
{
struct stat st ;
if (stat("down", &st) == -1)
{
if (errno != ENOENT)
strerr_diefu1sys(111, "stat down") ;
}
else status.flagwantup = 0 ;
if (stat("nosetsid", &st) == -1)
{
if (errno != ENOENT)
strerr_diefu1sys(111, "stat nosetsid") ;
}
else flagsetsid = 0 ;
}
tain_now_g() ;
settimeout(0) ;
tain_copynow(&status.stamp) ;
announce() ;
ftrigw_notifyb_nosig(S6_SUPERVISE_EVENTDIR, "s", 1) ;
while (cont)
{
register int r = iopause_g(x, 2, &deadline) ;
if (r < 0) strerr_diefu1sys(111, "iopause") ;
else if (!r) (*actions[state][V_TIMEOUT])() ;
else
{
if ((x[0].revents | x[1].revents) & IOPAUSE_EXCEPT)
strerr_diefu1x(111, "iopause: trouble with pipes") ;
if (x[0].revents & IOPAUSE_READ) handle_signals() ;
else if (x[1].revents & IOPAUSE_READ) handle_control(x[1].fd) ;
}
}
ftrigw_notifyb_nosig(S6_SUPERVISE_EVENTDIR, "x", 1) ;
}
return 0 ;
}
