containers
/
podman
mirror of https://github.com/containers/podman.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix close fds of exec --preserve-fds 

Fix the closing of fds from --preserve-fds to avoid the operation on unrelated fds.

Signed-off-by: Qi Wang <qiwan@redhat.com>
This commit is contained in:
Qi Wang 2020-07-31 08:26:50 -04:00
parent bb96c8918b
commit 3fccb699e4
1 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
libpod/oci_conmon_exec_linux.go
View File

@ -449,9 +449,12 @@ func (r *ConmonOCIRuntime) startExec(c *Container, sessionID string, options *Ex
return nil, nil, err
}
var filesToClose []*os.File
if options.PreserveFDs > 0 {
for fd := 3; fd < int(3+options.PreserveFDs); fd++ {
execCmd.ExtraFiles = append(execCmd.ExtraFiles, os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd)))
f := os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd))
filesToClose = append(filesToClose, f)
execCmd.ExtraFiles = append(execCmd.ExtraFiles, f)
}
}
@ -483,14 +486,10 @@ func (r *ConmonOCIRuntime) startExec(c *Container, sessionID string, options *Ex
return nil, nil, err
}
if options.PreserveFDs > 0 {
for fd := 3; fd < int(3+options.PreserveFDs); fd++ {
// These fds were passed down to the runtime. Close them
// and not interfere
if err := os.NewFile(uintptr(fd), fmt.Sprintf("fd-%d", fd)).Close(); err != nil {
logrus.Debugf("unable to close file fd-%d", fd)
}
}
for _, f := range filesToClose {
errorhandling.CloseQuiet(f)
}
return execCmd, pipes, nil