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console: adapt lxc_console_mainloop_add()

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Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
This commit is contained in:
Christian Brauner 2017-12-23 13:25:44 +01:00
parent b75c344c24
commit 30a33fbd27
No known key found for this signature in database
GPG Key ID: 8EB056D53EECB12D
4 changed files with 37 additions and 32 deletions
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22
src/lxc/console.c
View File

@ -285,31 +285,25 @@ static int lxc_console_mainloop_add_peer(struct lxc_console *console)
return 0;
}
extern int lxc_console_mainloop_add(struct lxc_epoll_descr *descr,
struct lxc_conf *conf)
int lxc_console_mainloop_add(struct lxc_epoll_descr *descr,
struct lxc_console *console)
{
int ret;
struct lxc_console *console = &conf->console;
if (!conf->rootfs.path) {
INFO("no rootfs, no console.");
return 0;
}
if (console->master < 0) {
INFO("no console");
return 0;
}
if (lxc_mainloop_add_handler(descr, console->master,
lxc_console_cb_con, console)) {
ERROR("failed to add to mainloop console handler for '%d'",
console->master);
ret = lxc_mainloop_add_handler(descr, console->master,
lxc_console_cb_con, console);
if (ret < 0) {
ERROR("Failed to add handler for %d to mainloop", console->master);
return -1;
}
/* we cache the descr so that we can add an fd to it when someone
* does attach to it in lxc_console_allocate()
/* We cache the descr so that we can add an fd to it when someone
* does attach to it in lxc_console_allocate().
*/
console->descr = descr;
ret = lxc_console_mainloop_add_peer(console);

2
src/lxc/console.h
View File

@ -114,7 +114,7 @@ extern void lxc_console_free(struct lxc_conf *conf, int fd);
/*
* Register pty event handlers in an open mainloop
*/
extern int lxc_console_mainloop_add(struct lxc_epoll_descr *, struct lxc_conf *);
extern int lxc_console_mainloop_add(struct lxc_epoll_descr *, struct lxc_console *);
/*
* Handle SIGWINCH events on the allocated ptys.

43
src/lxc/start.c
View File

@ -468,6 +468,7 @@ int lxc_set_state(const char *name, struct lxc_handler *handler,
int lxc_poll(const char *name, struct lxc_handler *handler)
{
int ret;
bool has_console = (handler->conf->rootfs.path != NULL);
struct lxc_epoll_descr descr, descr_console;
ret = lxc_mainloop_open(&descr);
@ -476,10 +477,12 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
goto out_sigfd;
}
ret = lxc_mainloop_open(&descr_console);
if (ret < 0) {
ERROR("Failed to create console mainloop");
goto out_mainloop;
if (has_console) {
ret = lxc_mainloop_open(&descr_console);
if (ret < 0) {
ERROR("Failed to create console mainloop");
goto out_mainloop;
}
}
ret = lxc_mainloop_add_handler(&descr, handler->sigfd, signal_handler, handler);
@ -488,16 +491,20 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
goto out_mainloop_console;
}
ret = lxc_console_mainloop_add(&descr, handler->conf);
if (ret < 0) {
ERROR("Failed to add console handlers to mainloop");
goto out_mainloop_console;
}
if (has_console) {
struct lxc_console *console = &handler->conf->console;
ret = lxc_console_mainloop_add(&descr_console, handler->conf);
if (ret < 0) {
ERROR("Failed to add console handlers to console mainloop");
goto out_mainloop_console;
ret = lxc_console_mainloop_add(&descr, console);
if (ret < 0) {
ERROR("Failed to add console handlers to mainloop");
goto out_mainloop_console;
}
ret = lxc_console_mainloop_add(&descr_console, console);
if (ret < 0) {
ERROR("Failed to add console handlers to console mainloop");
goto out_mainloop_console;
}
}
ret = lxc_cmd_mainloop_add(name, &descr, handler);
@ -514,15 +521,19 @@ int lxc_poll(const char *name, struct lxc_handler *handler)
if (ret < 0 || !handler->init_died)
goto out_mainloop;
ret = lxc_mainloop(&descr_console, 0);
if (has_console)
ret = lxc_mainloop(&descr_console, 0);
out_mainloop:
lxc_mainloop_close(&descr);
TRACE("Closed mainloop");
out_mainloop_console:
lxc_mainloop_close(&descr_console);
TRACE("Closed console mainloop");
if (has_console) {
lxc_mainloop_close(&descr_console);
TRACE("Closed console mainloop");
}
out_sigfd:
close(handler->sigfd);

2
src/lxc/tools/lxc_attach.c
View File

@ -356,7 +356,7 @@ static int get_pty_on_host(struct lxc_container *c, struct wrapargs *wrap, int *
goto err2;
}
if (lxc_console_mainloop_add(&descr, conf) < 0) {
if (lxc_console_mainloop_add(&descr, &conf->console) < 0) {
fprintf(stderr, "Failed to add handlers to lxc mainloop.\n");
goto err3;
}