From 11d61581aa4cb74f657fe252132d6f757a88d41f Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Wed, 10 Dec 2014 01:45:43 +0100 Subject: core: unify how we iterate over inotify events Let's add some syntactic sugar for iterating through inotify events, and use it everywhere. Signed-off-by: Anthony G. Basile --- src/udev/udevd.c | 33 +++++++++++++-------------------- 1 file changed, 13 insertions(+), 20 deletions(-) (limited to 'src/udev/udevd.c') diff --git a/src/udev/udevd.c b/src/udev/udevd.c index 75efa67d22..b519dc4c99 100644 --- a/src/udev/udevd.c +++ b/src/udev/udevd.c @@ -807,41 +807,34 @@ static int synthesize_change(struct udev_device *dev) { } static int handle_inotify(struct udev *udev) { - int nbytes, pos; - char *buf; - struct inotify_event *ev; - int r; + uint8_t buffer[INOTIFY_EVENT_MAX] _alignas_(struct inotify_event); + struct inotify_event *e; + ssize_t l; - r = ioctl(fd_inotify, FIONREAD, &nbytes); - if (r < 0 || nbytes <= 0) - return -errno; + l = read(fd_inotify, buffer, sizeof(buffer)); + if (l < 0) { + if (errno == EAGAIN || errno == EINTR) + return 0; - buf = malloc(nbytes); - if (!buf) { - log_error("error getting buffer for inotify"); - return -ENOMEM; + return log_error_errno(errno, "Failed to read inotify fd: %m"); } - nbytes = read(fd_inotify, buf, nbytes); - - for (pos = 0; pos < nbytes; pos += sizeof(struct inotify_event) + ev->len) { + FOREACH_INOTIFY_EVENT(e, buffer, l) { struct udev_device *dev; - ev = (struct inotify_event *)(buf + pos); - dev = udev_watch_lookup(udev, ev->wd); + dev = udev_watch_lookup(udev, e->wd); if (!dev) continue; - log_debug("inotify event: %x for %s", ev->mask, udev_device_get_devnode(dev)); - if (ev->mask & IN_CLOSE_WRITE) + log_debug("inotify event: %x for %s", e->mask, udev_device_get_devnode(dev)); + if (e->mask & IN_CLOSE_WRITE) synthesize_change(dev); - else if (ev->mask & IN_IGNORED) + else if (e->mask & IN_IGNORED) udev_watch_end(udev, dev); udev_device_unref(dev); } - free(buf); return 0; } -- cgit v1.2.3-54-g00ecf