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udevd: inotify - modernizations

This commit is contained in:
Kay Sievers 2014-06-04 11:05:45 +02:00
parent 6a010ac9e5
commit edd32000c8
1 changed files with 22 additions and 23 deletions
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45
src/udev/udevd.c
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@ -733,20 +733,30 @@ out:
return udev_ctrl_connection_unref(ctrl_conn);
}
static void synthesize_change(struct udev_device *dev) {
char filename[UTIL_PATH_SIZE];
log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
write_string_file(filename, "change");
}
/* read inotify messages */
static int handle_inotify(struct udev *udev)
{
int nbytes, pos;
char *buf;
struct inotify_event *ev;
int r;
if ((ioctl(fd_inotify, FIONREAD, &nbytes) < 0) || (nbytes <= 0))
return 0;
r = ioctl(fd_inotify, FIONREAD, &nbytes);
if (r < 0 || nbytes <= 0)
return -errno;
buf = malloc(nbytes);
if (buf == NULL) {
if (!buf) {
log_error("error getting buffer for inotify");
return -1;
return -ENOMEM;
}
nbytes = read(fd_inotify, buf, nbytes);
@ -756,27 +766,16 @@ static int handle_inotify(struct udev *udev)
ev = (struct inotify_event *)(buf + pos);
dev = udev_watch_lookup(udev, ev->wd);
if (dev != NULL) {
log_debug("inotify event: %x for %s", ev->mask, udev_device_get_devnode(dev));
if (ev->mask & IN_CLOSE_WRITE) {
char filename[UTIL_PATH_SIZE];
int fd;
if (!dev)
continue;
log_debug("device %s closed, synthesising 'change'", udev_device_get_devnode(dev));
strscpyl(filename, sizeof(filename), udev_device_get_syspath(dev), "/uevent", NULL);
fd = open(filename, O_WRONLY|O_CLOEXEC);
if (fd >= 0) {
if (write(fd, "change", 6) < 0)
log_debug("error writing uevent: %m");
close(fd);
}
}
if (ev->mask & IN_IGNORED)
udev_watch_end(udev, dev);
udev_device_unref(dev);
}
log_debug("inotify event: %x for %s", ev->mask, udev_device_get_devnode(dev));
if (ev->mask & IN_CLOSE_WRITE)
synthesize_change(dev);
else if (ev->mask & IN_IGNORED)
udev_watch_end(udev, dev);
udev_device_unref(dev);
}
free(buf);