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pkg/fileutil: clarify flock errors

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Signed-off-by: Gyuho Lee <gyuhox@gmail.com>
This commit is contained in:
Gyuho Lee
2018-05-03 14:00:42 -07:00
parent 62dfb89a89
commit 2bb1a268b3
1 changed files with 4 additions and 4 deletions
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8
pkg/fileutil/lock_linux.go
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@@ -17,6 +17,7 @@
package fileutil
import (
"fmt"
"io"
"os"
"syscall"
@@ -62,7 +63,7 @@ func TryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
func ofdTryLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
f, err := os.OpenFile(path, flag, perm)
if err != nil {
return nil, err
return nil, fmt.Errorf("ofdTryLockFile failed to open %q (%v)", path, err)
}
flock := wrlck
@@ -83,15 +84,14 @@ func LockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
func ofdLockFile(path string, flag int, perm os.FileMode) (*LockedFile, error) {
f, err := os.OpenFile(path, flag, perm)
if err != nil {
return nil, err
return nil, fmt.Errorf("ofdLockFile failed to open %q (%v)", path, err)
}
flock := wrlck
err = syscall.FcntlFlock(f.Fd(), F_OFD_SETLKW, &flock)
if err != nil {
f.Close()
return nil, err
}
return &LockedFile{f}, err
return &LockedFile{f}, nil
}