__attribute__((unused)) static void task_reclamation_test(void) {
for(int i=0; i<1000; ++i) {
printf("%05x ", spawn(1, null_task, 0));
printf("%05x ", spawn(1, null_task, 0));
printf("%05x\n", spawn(3, null_task, 0));
}
xspawn(4, task_reclamation_2, 0);
}
int inotifyd_main(int argc UNUSED_PARAM, char **argv)
{
int n;
unsigned mask = IN_ALL_EVENTS; // assume we want all events
struct pollfd pfd;
char **watched = ++argv; // watched name list
const char *args[] = { *argv, NULL, NULL, NULL, NULL };
// sanity check: agent and at least one watch must be given
if (!argv[1])
bb_show_usage();
// open inotify
pfd.fd = inotify_init();
if (pfd.fd < 0)
bb_perror_msg_and_die("no kernel support");
// setup watched
while (*++argv) {
char *path = *argv;
char *masks = strchr(path, ':');
// if mask is specified ->
if (masks) {
*masks = '\0'; // split path and mask
// convert mask names to mask bitset
mask = 0;
while (*++masks) {
int i = strchr(mask_names, *masks) - mask_names;
if (i >= 0) {
mask |= (1 << i);
}
}
}
// add watch
n = inotify_add_watch(pfd.fd, path, mask);
if (n < 0)
bb_perror_msg_and_die("add watch (%s) failed", path);
//bb_error_msg("added %d [%s]:%4X", n, path, mask);
}
// setup signals
bb_signals(BB_FATAL_SIGS, record_signo);
// do watch
pfd.events = POLLIN;
while (1) {
ssize_t len;
void *buf;
struct inotify_event *ie;
again:
if (bb_got_signal)
break;
n = poll(&pfd, 1, -1);
/* Signal interrupted us? */
if (n < 0 && errno == EINTR)
goto again;
// Under Linux, above if() is not necessary.
// Non-fatal signals, e.g. SIGCHLD, when set to SIG_DFL,
// are not interrupting poll().
// Thus we can just break if n <= 0 (see below),
// because EINTR will happen only on SIGTERM et al.
// But this might be not true under other Unixes,
// and is generally way too subtle to depend on.
if (n <= 0) // strange error?
break;
// read out all pending events
xioctl(pfd.fd, FIONREAD, &len);
#define eventbuf bb_common_bufsiz1
ie = buf = (len <= sizeof(eventbuf)) ? eventbuf : xmalloc(len);
len = full_read(pfd.fd, buf, len);
// process events. N.B. events may vary in length
while (len > 0) {
int i;
char events[sizeof(mask_names)];
char *s = events;
unsigned m = ie->mask;
for (i = 0; i < sizeof(mask_names)-1; ++i, m >>= 1) {
if (m & 1)
*s++ = mask_names[i];
}
*s = '\0';
//bb_error_msg("exec %s %08X\t%s\t%s\t%s", agent,
// ie->mask, events, watched[ie->wd], ie->len ? ie->name : "");
args[1] = events;
args[2] = watched[ie->wd];
args[3] = ie->len ? ie->name : NULL;
wait4pid(xspawn((char **)args));
// next event
i = sizeof(struct inotify_event) + ie->len;
len -= i;
ie = (void*)((char*)ie + i);
}
if (eventbuf != buf)
free(buf);
}
return EXIT_SUCCESS;
}
