os: directory exists but os.ReadDir reports "no such file or directory" #46408
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NeedsInvestigation
Someone must examine and confirm this is a valid issue and not a duplicate of an existing one.
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mknyszek
changed the title
mknyszek
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NeedsInvestigation
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Is that directory mounted in a special way? I don't think we'll be able to determine whether this is a bug without more information though. |
mknyszek
added
the
WaitingForInfo
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What is the output of Please report this as ordinary plain text in the issue, not as a screenshot. Screenshots are very difficult to read and there is no reason to use them for ordinary text. Thanks. |
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i mount cifs device in this dir,but sometime i can read ,there is a little chance of reading failure,this is my mount command: |
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Does anything if you remove the trailing slash in the call to |
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I try keep it, but nothing change |
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That is a different directory. Also, it has a trailing slash. I'm trying to understand whether there is something about CIFS that is rejecting attempts to open a directory when the trailing slash is passed to |
When my directory does not have /, i tried to use os.ReadDir open 100000.package main
import (
"fmt"
"os"
)
var (
max = 100000
errCount int
i = 0
dir="/media/olongfen/stomach/data/ccb/A003-202104/A003-7"
)
for i < max {
if _, err := os.ReadDir(dir); err != nil {
errCount++
}
i++
}
fmt.Println("fail count: ", errCount)
// outout: fail count: 2615When my directory does have /,i tried to use os.ReadDir open 100000.package main
import (
"fmt"
"os"
)
var (
max = 100000
errCount int
i = 0
dir = "/media/olongfen/stomach/data/ccb/A003-202104/A003-7/"
)
for i < max {
if _, err := os.ReadDir(dir); err != nil {
errCount++
}
i++
}
fmt.Println("fail count: ", errCount)
// otput: fail count: 2575so i think nothing to do with slash |
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@olongfen This is off-topic, but can you format your comment to make it easy to read? See https://github.github.com/gfm/ for how to write markdown. |
I am sorry |
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Thanks. Can you run your program under |
My used command |
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Thanks. That output is very odd. Omitting a lot of irrelevancies, I see The Go library does not expect the Looking at the glibc code, I see this: Perhaps we should do something similar. That said, it doesn't seem to me that this directory has been removed. This seems like a bug in the CIFS file system support, a bug that is being papered over by glibc. Specifically, I think the bug may be here: https://github.com/torvalds/linux/blob/master/fs/cifs/readdir.c#L721. Why is that code correct? Anybody know someone to ask? Thanks. |
Thanks. |
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Ian, have you asked that Q on any Linux forum? @gopherbot remove WaitingForInfo |
gopherbot
removed
the
WaitingForInfo
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go envOutputI do it
I used os.ReadDir("/media/olongfen/stomach/data/ccb/A003-202104/A003-7/"), i confirm my dir is exist,but it send this error: ERRO[0000] readdirent /media/olongfen/stomach/data/ccb/A003-202104/A003-7/: no such file or directoryWhat did you see instead?
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