From 1df4dba0a0c335ad68b1c2202b8099cd87aa3d94 Mon Sep 17 00:00:00 2001 From: Peter Hunt Date: Thu, 31 Oct 2019 10:41:26 -0400 Subject: Switch to bufio Reader for exec streams There were many situations that made exec act funky with input. pipes didn't work as expected, as well as sending input before the shell opened. Thinking about it, it seemed as though the issues were because of how os.Stdin buffers (it doesn't). Dropping this input had some weird consequences. Instead, read from os.Stdin as bufio.Reader, allowing the input to buffer before passing it to the container. Signed-off-by: Peter Hunt --- libpod/container_api.go | 3 ++- libpod/healthcheck.go | 4 +++- pkg/adapter/containers.go | 4 ++-- pkg/adapter/terminal_linux.go | 3 ++- pkg/varlinkapi/attach.go | 2 +- 5 files changed, 10 insertions(+), 6 deletions(-) diff --git a/libpod/container_api.go b/libpod/container_api.go index 1b2d52ce3..a6f5b54d5 100644 --- a/libpod/container_api.go +++ b/libpod/container_api.go @@ -1,6 +1,7 @@ package libpod import ( + "bufio" "context" "io" "io/ioutil" @@ -361,7 +362,7 @@ type AttachStreams struct { // ErrorStream will be attached to container's STDERR ErrorStream io.WriteCloser // InputStream will be attached to container's STDIN - InputStream io.Reader + InputStream *bufio.Reader // AttachOutput is whether to attach to STDOUT // If false, stdout will not be attached AttachOutput bool diff --git a/libpod/healthcheck.go b/libpod/healthcheck.go index 68ffc2349..e9c950713 100644 --- a/libpod/healthcheck.go +++ b/libpod/healthcheck.go @@ -133,7 +133,9 @@ func (c *Container) runHealthCheck() (HealthCheckStatus, error) { streams := new(AttachStreams) streams.OutputStream = hcw streams.ErrorStream = hcw - streams.InputStream = os.Stdin + + streams.InputStream = bufio.NewReader(os.Stdin) + streams.AttachOutput = true streams.AttachError = true streams.AttachInput = true diff --git a/pkg/adapter/containers.go b/pkg/adapter/containers.go index 430b6925d..27fd42899 100644 --- a/pkg/adapter/containers.go +++ b/pkg/adapter/containers.go @@ -891,7 +891,7 @@ func (r *LocalRuntime) execPS(c *libpod.Container, args []string) ([]string, err streams := new(libpod.AttachStreams) streams.OutputStream = wPipe streams.ErrorStream = wPipe - streams.InputStream = os.Stdin + streams.InputStream = bufio.NewReader(os.Stdin) streams.AttachOutput = true streams.AttachError = true streams.AttachInput = true @@ -969,7 +969,7 @@ func (r *LocalRuntime) ExecContainer(ctx context.Context, cli *cliconfig.ExecVal streams.OutputStream = os.Stdout streams.ErrorStream = os.Stderr if cli.Interactive { - streams.InputStream = os.Stdin + streams.InputStream = bufio.NewReader(os.Stdin) streams.AttachInput = true } streams.AttachOutput = true diff --git a/pkg/adapter/terminal_linux.go b/pkg/adapter/terminal_linux.go index 16e552802..3dc5864e2 100644 --- a/pkg/adapter/terminal_linux.go +++ b/pkg/adapter/terminal_linux.go @@ -1,6 +1,7 @@ package adapter import ( + "bufio" "context" "fmt" "os" @@ -61,7 +62,7 @@ func StartAttachCtr(ctx context.Context, ctr *libpod.Container, stdout, stderr, streams := new(libpod.AttachStreams) streams.OutputStream = stdout streams.ErrorStream = stderr - streams.InputStream = stdin + streams.InputStream = bufio.NewReader(stdin) streams.AttachOutput = true streams.AttachError = true streams.AttachInput = true diff --git a/pkg/varlinkapi/attach.go b/pkg/varlinkapi/attach.go index 37adbbf55..5beca3c6f 100644 --- a/pkg/varlinkapi/attach.go +++ b/pkg/varlinkapi/attach.go @@ -32,7 +32,7 @@ func setupStreams(call iopodman.VarlinkCall) (*bufio.Reader, *bufio.Writer, *io. streams := libpod.AttachStreams{ OutputStream: stdoutWriter, - InputStream: pr, + InputStream: bufio.NewReader(pr), // Runc eats the error stream ErrorStream: stdoutWriter, AttachInput: true, -- cgit v1.2.3-54-g00ecf