From 0d522e0d3b1e1ec4543ece4e7a9a0ed99da760c4 Mon Sep 17 00:00:00 2001 From: Jakob Unterwurzacher Date: Sun, 24 May 2020 23:51:38 +0200 Subject: Add contrib/getdents-debug/readdirnames Another way to repro the problem in https://github.com/rfjakob/gocryptfs/issues/483 --- contrib/getdents-debug/readdirnames/.gitignore | 1 + .../getdents-debug/readdirnames/readdirnames.go | 56 ++++++++++++++++++++++ 2 files changed, 57 insertions(+) create mode 100644 contrib/getdents-debug/readdirnames/.gitignore create mode 100644 contrib/getdents-debug/readdirnames/readdirnames.go (limited to 'contrib') diff --git a/contrib/getdents-debug/readdirnames/.gitignore b/contrib/getdents-debug/readdirnames/.gitignore new file mode 100644 index 0000000..228dbb3 --- /dev/null +++ b/contrib/getdents-debug/readdirnames/.gitignore @@ -0,0 +1 @@ +/readdirnames diff --git a/contrib/getdents-debug/readdirnames/readdirnames.go b/contrib/getdents-debug/readdirnames/readdirnames.go new file mode 100644 index 0000000..dc33512 --- /dev/null +++ b/contrib/getdents-debug/readdirnames/readdirnames.go @@ -0,0 +1,56 @@ +/* +Small tool to try to debug unix.Getdents problems on CIFS mounts +( https://github.com/rfjakob/gocryptfs/issues/483 ) + +Example output: + +$ while sleep 1 ; do ./readdirnames /mnt/synology/public/tmp/g1 ; done +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=868, err=readdirent: no such file or directory +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +2020/05/24 23:50:39 os.Open returned err=open /mnt/synology/public/tmp/g1: interrupted system call +Readdirnames: len=1001, err= +Readdirnames: len=1001, err= +*/ + +package main + +import ( + "flag" + "fmt" + "log" + "os" +) + +const ( + myName = "readdirnames" +) + +func main() { + flag.Usage = func() { + fmt.Fprintf(os.Stderr, "Usage: %s PATH\n", myName) + fmt.Fprintf(os.Stderr, "Run os.File.Readdirnames on PATH\n") + os.Exit(1) + } + flag.Parse() + if flag.NArg() != 1 { + flag.Usage() + } + path := flag.Arg(0) + + f, err := os.Open(path) + if err != nil { + log.Fatalf("os.Open returned err=%v", err) + } + + names, err := f.Readdirnames(0) + fmt.Printf("Readdirnames: len=%d, err=%v\n", len(names), err) +} -- cgit v1.2.3