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improve read syscall reliability by inreasing buffer size and handling old kernel errors

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Dominic Breuker
2019-08-11 23:01:53 +02:00
parent 0c973089dd
commit 8264b725de
1 changed files with 3 additions and 2 deletions
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5
internal/fswatcher/inotify/inotify.go
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@@ -17,7 +17,8 @@ const maximumWatchersFile = "/proc/sys/fs/inotify/max_user_watches"
// set to -1 if the number cannot be determined // set to -1 if the number cannot be determined
var MaxWatchers int = -1 var MaxWatchers int = -1
const EventSize int = unix.SizeofInotifyEvent // sizeof(struct inotify_event) + NAME_MAX + 1
const EventSize int = unix.SizeofInotifyEvent + 255 + 1
func init() { func init() {
mw, err := getMaxWatchers() mw, err := getMaxWatchers()
@@ -71,7 +72,7 @@ func (i *Inotify) Watch(dir string) error {
func (i *Inotify) Read(buf []byte) (int, error) { func (i *Inotify) Read(buf []byte) (int, error) {
n, errno := unix.Read(i.FD, buf) n, errno := unix.Read(i.FD, buf)
if n < 0 { if n < 1 {
return n, fmt.Errorf("reading from inotify fd %d: errno: %d", i.FD, errno) return n, fmt.Errorf("reading from inotify fd %d: errno: %d", i.FD, errno)
} }
return n, nil return n, nil