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Add more information in the error messages when writing to a file 

This is helpful to debug "invalid argument" errors when writing to cgroup files

Signed-off-by: Mrunal Patel <mrunalp@gmail.com>
This commit is contained in:
Mrunal Patel 2016-03-18 14:57:52 -07:00
parent 69fe79de10
commit 35541ebcd2
1 changed files with 4 additions and 1 deletions
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5
libcontainer/cgroups/fs/apply_raw.go
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@ -351,7 +351,10 @@ func writeFile(dir, file, data string) error {
if dir == "" {
return fmt.Errorf("no such directory for %s.", file)
}
return ioutil.WriteFile(filepath.Join(dir, file), []byte(data), 0700)
if err := ioutil.WriteFile(filepath.Join(dir, file), []byte(data), 0700); err != nil {
return fmt.Errorf("failed to write %v to %v: %v", data, file, err)
}
return nil
}
func readFile(dir, file string) (string, error) {