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From 36f64e652afc7fe3feac6d93468cbc4f3d53ec9a Mon Sep 17 00:00:00 2001
From: LiFeng <[email protected]>
Date: Tue, 21 Apr 2020 15:36:55 +0800
Subject: [PATCH] attach: seprate -i and -t flags
Signed-off-by: LiFeng <[email protected]>
---
src/lxc/attach.c | 100 ++++++++++++++++++++++++++++++++++++++++++++-
src/lxc/attach_options.h | 2 +
src/lxc/start.c | 1 +
src/lxc/terminal.c | 14 ++++---
src/lxc/tools/lxc_attach.c | 17 +++++++-
5 files changed, 125 insertions(+), 9 deletions(-)
diff --git a/src/lxc/attach.c b/src/lxc/attach.c
index 1dd2b47..5539fb1 100644
--- a/src/lxc/attach.c
+++ b/src/lxc/attach.c
@@ -653,6 +653,9 @@ struct attach_clone_payload {
struct lxc_proc_context_info *init_ctx;
lxc_attach_exec_t exec_function;
void *exec_payload;
+#ifdef HAVE_ISULAD
+ struct lxc_terminal *terminal;
+#endif
};
static void lxc_put_attach_clone_payload(struct attach_clone_payload *p)
@@ -665,6 +668,49 @@ static void lxc_put_attach_clone_payload(struct attach_clone_payload *p)
}
}
+#ifdef HAVE_ISULAD
+static int isulad_set_attach_pipes(struct lxc_terminal *terminal)
+{
+ int ret = 0;
+ if (terminal->pipes[0][1] >= 0) {
+ close(terminal->pipes[0][1]);
+ terminal->pipes[0][1] = -1;
+ }
+
+ if (terminal->pipes[0][0] >= 0) {
+ ret = dup2(terminal->pipes[0][0], STDIN_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+
+ if (terminal->pipes[1][0] >= 0) {
+ close(terminal->pipes[1][0]);
+ terminal->pipes[1][0] = -1;
+ }
+
+ if (terminal->pipes[1][1] >= 0) {
+ ret = dup2(terminal->pipes[1][1], STDOUT_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+ if (terminal->pipes[2][0] >= 0) {
+ close(terminal->pipes[2][0]);
+ terminal->pipes[2][0] = -1;
+ }
+
+ if (terminal->pipes[2][1] >= 0) {
+ ret = dup2(terminal->pipes[2][1], STDERR_FILENO);
+ if (ret < 0)
+ goto out;
+ }
+
+ setsid();
+out:
+ return ret;
+}
+
+#endif
+
static int attach_child_main(struct attach_clone_payload *payload)
{
int lsm_fd, ret;
@@ -933,6 +979,25 @@ static int attach_child_main(struct attach_clone_payload *payload)
}
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
+
+#ifdef HAVE_ISULAD
+ /* isulad: dup2 pipe[0][0] to container stdin, pipe[1][1] to container stdout, pipe[2][1] to container stderr */
+ if (payload->terminal->disable_pty) {
+ ret = isulad_set_attach_pipes(payload->terminal);
+ if (ret < 0) {
+ SYSERROR("Failed to prepare terminal file pipes");
+ goto on_error;
+ }
+ }
+
+ if(!payload->terminal->disable_pty && payload->terminal_slave_fd >= 0) {
+ ret = lxc_terminal_prepare_login(payload->terminal_slave_fd);
+ if (ret < 0) {
+ SYSERROR("Failed to prepare terminal file descriptor %d", payload->terminal_slave_fd);
+ goto on_error;
+ }
+ }
+#else
ret = lxc_terminal_prepare_login(payload->terminal_slave_fd);
if (ret < 0) {
SYSERROR("Failed to prepare terminal file descriptor %d", payload->terminal_slave_fd);
@@ -940,6 +1005,7 @@ static int attach_child_main(struct attach_clone_payload *payload)
}
TRACE("Prepared terminal file descriptor %d", payload->terminal_slave_fd);
+#endif
}
/* Avoid unnecessary syscalls. */
@@ -1016,6 +1082,9 @@ static int lxc_attach_terminal(struct lxc_conf *conf,
free(terminal->init_fifo[2]);
terminal->init_fifo[2] = safe_strdup(options->init_fifo[2]);
}
+
+ terminal->disable_pty = options->disable_pty;
+ terminal->open_stdin = options->open_stdin;
#endif
ret = lxc_terminal_create(terminal);
@@ -1410,6 +1479,21 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
/* isulad: close errpipe */
close(conf->errpipe[1]);
conf->errpipe[1] = -1;
+ /* isulad: close pipe after clone */
+ if (terminal.pipes[0][0] >= 0) {
+ close(terminal.pipes[0][0]);
+ terminal.pipes[0][0] = -1;
+ }
+
+ if (terminal.pipes[1][1] >= 0) {
+ close(terminal.pipes[1][1]);
+ terminal.pipes[1][1] = -1;
+ }
+
+ if (terminal.pipes[2][1] >= 0) {
+ close(terminal.pipes[2][1]);
+ terminal.pipes[2][1] = -1;
+ }
#endif
lxc_proc_close_ns_fd(init_ctx);
if (options->attach_flags & LXC_ATTACH_TERMINAL)
@@ -1568,6 +1652,15 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
ret_parent = 0;
to_cleanup_pid = -1;
+ #ifdef HAVE_ISULAD
+ // iSulad: close stdin pipe if we do not want open_stdin with container stdin
+ if (!terminal.open_stdin) {
+ if (terminal.pipes[0][1] > 0) {
+ close(terminal.pipes[0][1]);
+ terminal.pipes[0][1] = -1;
+ }
+ }
+ #endif
if (options->attach_flags & LXC_ATTACH_TERMINAL) {
ret = lxc_mainloop(&descr, -1);
if (ret < 0) {
@@ -1671,6 +1764,9 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
payload.terminal_slave_fd = terminal.slave;
payload.exec_function = exec_function;
payload.exec_payload = exec_payload;
+#ifdef HAVE_ISULAD
+ payload.terminal = &terminal;
+#endif
pid = lxc_raw_clone(CLONE_PARENT, NULL);
if (pid < 0) {
@@ -1697,9 +1793,9 @@ int lxc_attach(struct lxc_container *container, lxc_attach_exec_t exec_function,
_exit(EXIT_FAILURE);
}
- if (options->attach_flags & LXC_ATTACH_TERMINAL)
+ if (options->attach_flags & LXC_ATTACH_TERMINAL) {
lxc_attach_terminal_close_slave(&terminal);
-
+ }
/* Tell grandparent the pid of the pid of the newly created child. */
ret = lxc_write_nointr(ipc_sockets[1], &pid, sizeof(pid));
if (ret != sizeof(pid)) {
diff --git a/src/lxc/attach_options.h b/src/lxc/attach_options.h
index d5d4f44..5767560 100644
--- a/src/lxc/attach_options.h
+++ b/src/lxc/attach_options.h
@@ -121,6 +121,8 @@ typedef struct lxc_attach_options_t {
char *init_fifo[3]; /* isulad: default fifos for the start */
int64_t timeout;/* isulad: Seconds for waiting on a container to attach/exec before it is killed*/
const char *suffix;
+ bool disable_pty;
+ bool open_stdin;
} lxc_attach_options_t;
/*! Default attach options to use */
diff --git a/src/lxc/start.c b/src/lxc/start.c
index e099285..68a6116 100644
--- a/src/lxc/start.c
+++ b/src/lxc/start.c
@@ -1789,6 +1789,7 @@ static int do_start(void *data)
* as it execs.
*/
#ifdef HAVE_ISULAD
+ close_prot_errno_disarm(status_fd);
handler->ops->start(handler, handler->data, handler->daemonize ? handler->conf->errpipe[1] : -1);
#else
handler->ops->start(handler, handler->data);
diff --git a/src/lxc/terminal.c b/src/lxc/terminal.c
index c0a4d1a..57def93 100644
--- a/src/lxc/terminal.c
+++ b/src/lxc/terminal.c
@@ -750,21 +750,23 @@ int lxc_terminal_io_cb(int fd, uint32_t events, void *data,
return LXC_MAINLOOP_CONTINUE;
} else if (fd == terminal->pipes[1][0] || fd == terminal->pipes[2][0]) {
if (fd == terminal->pipes[1][0]) {
- w_log = isulad_lxc_terminal_write_log_file(terminal, "stdout", NULL, 0);
+ if (terminal->log_fd >= 0) {
+ w_log = isulad_lxc_terminal_write_log_file(terminal, "stdout", NULL, 0);
+ }
terminal->pipes[1][0] = -EBADF;
} else if (fd == terminal->pipes[2][0]) {
- w_log = isulad_lxc_terminal_write_log_file(terminal, "stderr", NULL, 0);
+ if (terminal->log_fd >= 0) {
+ w_log = isulad_lxc_terminal_write_log_file(terminal, "stderr", NULL, 0);
+ }
terminal->pipes[2][0] = -EBADF;
}
- if (w_log < 0)
- TRACE("Failed to write %d bytes to terminal log", r);
close(fd);
- return LXC_MAINLOOP_CONTINUE;
+ return LXC_MAINLOOP_CLOSE;
} else if (fd == terminal->pipes[0][1]) {
TRACE("closed stdin pipe of container stdin");
terminal->pipes[0][1] = -EBADF;
close(fd);
- return LXC_MAINLOOP_CONTINUE;
+ return LXC_MAINLOOP_CLOSE;
} else {
ERROR("Handler received unexpected file descriptor");
}
diff --git a/src/lxc/tools/lxc_attach.c b/src/lxc/tools/lxc_attach.c
index a855a8d..da7a7d2 100644
--- a/src/lxc/tools/lxc_attach.c
+++ b/src/lxc/tools/lxc_attach.c
@@ -82,6 +82,8 @@ static const struct option my_longopts[] = {
{"err-fifo", required_argument, 0, OPT_STDERR_FIFO},
{"suffix", required_argument, 0, OPT_ATTACH_SUFFIX},
{"timeout", required_argument, 0, OPT_ATTACH_TIMEOUT},
+ {"disable-pty", no_argument, 0, OPT_DISABLE_PTY},
+ {"open-stdin", no_argument, 0, OPT_OPEN_STDIN},
#endif
LXC_COMMON_OPTIONS
};
@@ -312,9 +314,14 @@ static int my_parser(struct lxc_arguments *args, int c, char *arg)
}
args->attach_timeout = (unsigned int)atoll(arg);
break;
+ case OPT_DISABLE_PTY:
+ args->disable_pty = 1;
+ break;
+ case OPT_OPEN_STDIN:
+ args->open_stdin = 1;
+ break;
#endif
}
-
return 0;
}
@@ -614,6 +621,14 @@ int main(int argc, char *argv[])
attach_options.suffix = my_args.suffix;
+ if (my_args.disable_pty) {
+ attach_options.disable_pty = true;
+ }
+
+ if (my_args.open_stdin) {
+ attach_options.open_stdin = true;
+ }
+
/* isulad: add do attach background */
if (attach_options.attach_flags & LXC_ATTACH_TERMINAL)
wexit = do_attach_foreground(c, &command, &attach_options, &errmsg);
--
1.8.3.1
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