* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <assert.h>
+#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <termios.h>
+#include "lxccontainer.h"
#include "log.h"
#include "conf.h"
#include "config.h"
#include "commands.h"
#include "mainloop.h"
#include "af_unix.h"
+#include "lxclock.h"
+#include "utils.h"
#if HAVE_PTY_H
#include <pty.h>
lxc_log_define(lxc_console, lxc);
-extern void lxc_console_remove_fd(int fd, struct lxc_tty_info *tty_info)
-{
- int i;
+static struct lxc_list lxc_ttys;
- for (i = 0; i < tty_info->nbtty; i++) {
-
- if (tty_info->pty_info[i].busy != fd)
- continue;
+typedef void (*sighandler_t)(int);
+struct lxc_tty_state
+{
+ struct lxc_list node;
+ int stdinfd;
+ int stdoutfd;
+ int masterfd;
+ int escape;
+ int saw_escape;
+ const char *winch_proxy;
+ const char *winch_proxy_lxcpath;
+ int sigfd;
+ sigset_t oldmask;
+};
+
+__attribute__((constructor))
+void lxc_console_init(void)
+{
+ lxc_list_init(&lxc_ttys);
+}
- tty_info->pty_info[i].busy = 0;
+/* lxc_console_winsz: propagte winsz from one terminal to another
+ *
+ * @srcfd : terminal to get size from (typically a slave pty)
+ * @dstfd : terminal to set size on (typically a master pty)
+ */
+static void lxc_console_winsz(int srcfd, int dstfd)
+{
+ struct winsize wsz;
+ if (isatty(srcfd) && ioctl(srcfd, TIOCGWINSZ, &wsz) == 0) {
+ DEBUG("set winsz dstfd:%d cols:%d rows:%d", dstfd,
+ wsz.ws_col, wsz.ws_row);
+ ioctl(dstfd, TIOCSWINSZ, &wsz);
}
+}
- return;
+static void lxc_console_winch(struct lxc_tty_state *ts)
+{
+ lxc_console_winsz(ts->stdinfd, ts->masterfd);
+ if (ts->winch_proxy) {
+ lxc_cmd_console_winch(ts->winch_proxy,
+ ts->winch_proxy_lxcpath);
+ }
}
-static int get_default_console(char **console)
+void lxc_console_sigwinch(int sig)
{
- int fd;
+ if (process_lock() == 0) {
+ struct lxc_list *it;
+ struct lxc_tty_state *ts;
- if (!access("/dev/tty", F_OK)) {
- fd = open("/dev/tty", O_RDWR);
- if (fd >= 0) {
- close(fd);
- *console = strdup("/dev/tty");
- goto out;
+ lxc_list_for_each(it, &lxc_ttys) {
+ ts = it->elem;
+ lxc_console_winch(ts);
}
+ process_unlock();
}
+}
- if (!access("/dev/null", F_OK)) {
- *console = strdup("/dev/null");
- goto out;
+static int lxc_console_cb_sigwinch_fd(int fd, void *cbdata,
+ struct lxc_epoll_descr *descr)
+{
+ struct signalfd_siginfo siginfo;
+ struct lxc_tty_state *ts = cbdata;
+
+ if (read(fd, &siginfo, sizeof(siginfo)) < 0) {
+ ERROR("failed to read signal info");
+ return -1;
}
- ERROR("No suitable default console");
+ lxc_console_winch(ts);
+ return 0;
+}
+
+/*
+ * lxc_console_sigwinch_init: install SIGWINCH handler
+ *
+ * @srcfd : src for winsz in SIGWINCH handler
+ * @dstfd : dst for winsz in SIGWINCH handler
+ *
+ * Returns lxc_tty_state structure on success or NULL on failure. The sigfd
+ * member of the returned lxc_tty_state can be select()/poll()ed/epoll()ed
+ * on (ie added to a mainloop) for SIGWINCH.
+ *
+ * Must be called with process_lock held to protect the lxc_ttys list, or
+ * from a non-threaded context.
+ *
+ * Note that SIGWINCH isn't installed as a classic asychronous handler,
+ * rather signalfd(2) is used so that we can handle the signal when we're
+ * ready for it. This avoids deadlocks since a signal handler
+ * (ie lxc_console_sigwinch()) would need to take the thread mutex to
+ * prevent lxc_ttys list corruption, but using the fd we can provide the
+ * tty_state needed to the callback (lxc_console_cb_sigwinch_fd()).
+ */
+static struct lxc_tty_state *lxc_console_sigwinch_init(int srcfd, int dstfd)
+{
+ sigset_t mask;
+ struct lxc_tty_state *ts;
+
+ ts = malloc(sizeof(*ts));
+ if (!ts)
+ return NULL;
+
+ memset(ts, 0, sizeof(*ts));
+ ts->stdinfd = srcfd;
+ ts->masterfd = dstfd;
+ ts->sigfd = -1;
+
+ /* add tty to list to be scanned at SIGWINCH time */
+ lxc_list_add_elem(&ts->node, ts);
+ lxc_list_add_tail(&lxc_ttys, &ts->node);
+
+ sigemptyset(&mask);
+ sigaddset(&mask, SIGWINCH);
+ if (sigprocmask(SIG_BLOCK, &mask, &ts->oldmask)) {
+ SYSERROR("failed to block SIGWINCH");
+ goto err1;
+ }
+
+ ts->sigfd = signalfd(-1, &mask, 0);
+ if (ts->sigfd < 0) {
+ SYSERROR("failed to get signalfd");
+ goto err2;
+ }
+
+ DEBUG("%d got SIGWINCH fd %d", getpid(), ts->sigfd);
+ goto out;
+
+err2:
+ sigprocmask(SIG_SETMASK, &ts->oldmask, NULL);
+err1:
+ lxc_list_del(&ts->node);
+ free(ts);
+ ts = NULL;
out:
- return *console ? 0 : -1;
+ return ts;
}
-int lxc_create_console(struct lxc_conf *conf)
+/*
+ * lxc_console_sigwinch_fini: uninstall SIGWINCH handler
+ *
+ * @ts : the lxc_tty_state returned by lxc_console_sigwinch_init
+ *
+ * Restore the saved signal handler that was in effect at the time
+ * lxc_console_sigwinch_init() was called.
+ *
+ * Must be called with process_lock held to protect the lxc_ttys list, or
+ * from a non-threaded context.
+ */
+static void lxc_console_sigwinch_fini(struct lxc_tty_state *ts)
{
- struct termios tios;
- struct lxc_console *console = &conf->console;
- int fd;
+ if (ts->sigfd >= 0)
+ close(ts->sigfd);
+ lxc_list_del(&ts->node);
+ sigprocmask(SIG_SETMASK, &ts->oldmask, NULL);
+ free(ts);
+}
- if (!conf->rootfs.path)
- return 0;
+static int lxc_console_cb_con(int fd, void *data,
+ struct lxc_epoll_descr *descr)
+{
+ struct lxc_console *console = (struct lxc_console *)data;
+ char buf[1024];
+ int r,w;
- if (!console->path && get_default_console(&console->path)) {
- ERROR("failed to get default console");
- return -1;
+ w = r = read(fd, buf, sizeof(buf));
+ if (r < 0) {
+ SYSERROR("failed to read");
+ return 1;
}
- if (!strcmp(console->path, "none"))
+ if (!r) {
+ INFO("console client on fd %d has exited", fd);
+ lxc_mainloop_del_handler(descr, fd);
+ close(fd);
return 0;
-
- if (openpty(&console->master, &console->slave,
- console->name, NULL, NULL)) {
- SYSERROR("failed to allocate a pty");
- return -1;
}
- if (fcntl(console->master, F_SETFD, FD_CLOEXEC)) {
- SYSERROR("failed to set console master to close-on-exec");
- goto err;
+ if (fd == console->peer)
+ w = write(console->master, buf, r);
+
+ if (fd == console->master) {
+ if (console->log_fd >= 0)
+ w = write(console->log_fd, buf, r);
+
+ if (console->peer >= 0)
+ w = write(console->peer, buf, r);
}
- if (fcntl(console->slave, F_SETFD, FD_CLOEXEC)) {
- SYSERROR("failed to set console slave to close-on-exec");
- goto err;
+ if (w != r)
+ WARN("console short write r:%d w:%d", r, w);
+ return 0;
+}
+
+static void lxc_console_mainloop_add_peer(struct lxc_console *console)
+{
+ if (console->peer >= 0) {
+ if (lxc_mainloop_add_handler(console->descr, console->peer,
+ lxc_console_cb_con, console))
+ WARN("console peer not added to mainloop");
}
- if (console->log_path) {
- fd = lxc_unpriv(open(console->log_path, O_CLOEXEC | O_RDWR | O_CREAT | O_APPEND, 0600));
- if (fd < 0) {
- SYSERROR("failed to open '%s'", console->log_path);
- goto err;
+ if (console->tty_state) {
+ if (lxc_mainloop_add_handler(console->descr,
+ console->tty_state->sigfd,
+ lxc_console_cb_sigwinch_fd,
+ console->tty_state)) {
+ WARN("failed to add to mainloop SIGWINCH handler for '%d'",
+ console->tty_state->sigfd);
}
- DEBUG("using '%s' as console log", console->log_path);
- console->log_fd = fd;
+ }
+}
+
+int lxc_console_mainloop_add(struct lxc_epoll_descr *descr,
+ struct lxc_handler *handler)
+{
+ struct lxc_conf *conf = handler->conf;
+ 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;
}
- fd = lxc_unpriv(open(console->path, O_CLOEXEC | O_RDWR | O_CREAT |
- O_APPEND, 0600));
- if (fd < 0) {
- SYSERROR("failed to open '%s'", console->path);
- goto err_close_console_log;
+ 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);
+ return -1;
}
- DEBUG("using '%s' as console", console->path);
+ /* 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;
+ lxc_console_mainloop_add_peer(console);
- console->peer = fd;
+ return 0;
+}
- if (!isatty(console->peer))
- return 0;
+static int setup_tios(int fd, struct termios *oldtios)
+{
+ struct termios newtios;
- console->tios = malloc(sizeof(tios));
- if (!console->tios) {
- SYSERROR("failed to allocate memory");
- goto err_close_console;
+ if (!isatty(fd)) {
+ ERROR("'%d' is not a tty", fd);
+ return -1;
}
- /* Get termios */
- if (tcgetattr(console->peer, console->tios)) {
+ /* Get current termios */
+ if (tcgetattr(fd, oldtios)) {
SYSERROR("failed to get current terminal settings");
- goto err_free;
+ return -1;
}
- tios = *console->tios;
+ newtios = *oldtios;
/* Remove the echo characters and signal reception, the echo
- * will be done below with master proxying */
- tios.c_iflag &= ~IGNBRK;
- tios.c_iflag &= BRKINT;
- tios.c_lflag &= ~(ECHO|ICANON|ISIG);
- tios.c_cc[VMIN] = 1;
- tios.c_cc[VTIME] = 0;
+ * will be done with master proxying */
+ newtios.c_iflag &= ~IGNBRK;
+ newtios.c_iflag &= BRKINT;
+ newtios.c_lflag &= ~(ECHO|ICANON|ISIG);
+ newtios.c_cc[VMIN] = 1;
+ newtios.c_cc[VTIME] = 0;
/* Set new attributes */
- if (tcsetattr(console->peer, TCSAFLUSH, &tios)) {
+ if (tcsetattr(fd, TCSAFLUSH, &newtios)) {
ERROR("failed to set new terminal settings");
- goto err_free;
+ return -1;
}
return 0;
+}
-err_free:
- free(console->tios);
-
-err_close_console:
- close(console->peer);
+static void lxc_console_peer_proxy_free(struct lxc_console *console)
+{
+ if (console->tty_state) {
+ lxc_console_sigwinch_fini(console->tty_state);
+ console->tty_state = NULL;
+ }
+ close(console->peerpty.master);
+ close(console->peerpty.slave);
+ console->peerpty.master = -1;
+ console->peerpty.slave = -1;
+ console->peerpty.busy = -1;
+ console->peerpty.name[0] = '\0';
console->peer = -1;
+}
-err_close_console_log:
- if (console->log_fd >= 0) {
- close(console->log_fd);
- console->log_fd = -1;
+static int lxc_console_peer_proxy_alloc(struct lxc_console *console, int sockfd)
+{
+ struct termios oldtermio;
+ struct lxc_tty_state *ts;
+
+ if (console->master < 0) {
+ ERROR("console not set up");
+ return -1;
+ }
+ if (console->peerpty.busy != -1 || console->peer != -1) {
+ NOTICE("console already in use");
+ return -1;
+ }
+ if (console->tty_state) {
+ ERROR("console already has tty_state");
+ return -1;
}
-err:
- close(console->master);
- console->master = -1;
+ /* this is the proxy pty that will be given to the client, and that
+ * the real pty master will send to / recv from
+ */
+ if (openpty(&console->peerpty.master, &console->peerpty.slave,
+ console->peerpty.name, NULL, NULL)) {
+ SYSERROR("failed to create proxy pty");
+ return -1;
+ }
- close(console->slave);
- console->slave = -1;
+ if (setup_tios(console->peerpty.slave, &oldtermio) < 0)
+ goto err1;
+
+ ts = lxc_console_sigwinch_init(console->peerpty.master, console->master);
+ if (!ts)
+ goto err1;
+
+ console->tty_state = ts;
+ console->peer = console->peerpty.slave;
+ console->peerpty.busy = sockfd;
+ lxc_console_mainloop_add_peer(console);
+
+ DEBUG("%d %s peermaster:%d sockfd:%d", getpid(), __FUNCTION__, console->peerpty.master, sockfd);
+ return 0;
+
+err1:
+ lxc_console_peer_proxy_free(console);
return -1;
}
-void lxc_delete_console(struct lxc_console *console)
+/* lxc_console_allocate: allocate the console or a tty
+ *
+ * @conf : the configuration of the container to allocate from
+ * @sockfd : the socket fd whose remote side when closed, will be an
+ * indication that the console or tty is no longer in use
+ * @ttyreq : the tty requested to be opened, -1 for any, 0 for the console
+ */
+int lxc_console_allocate(struct lxc_conf *conf, int sockfd, int *ttyreq)
+{
+ int masterfd = -1, ttynum;
+ struct lxc_tty_info *tty_info = &conf->tty_info;
+ struct lxc_console *console = &conf->console;
+
+ process_lock();
+ if (*ttyreq == 0) {
+ if (lxc_console_peer_proxy_alloc(console, sockfd) < 0)
+ goto out;
+ masterfd = console->peerpty.master;
+ goto out;
+ }
+
+ if (*ttyreq > 0) {
+ if (*ttyreq > tty_info->nbtty)
+ goto out;
+
+ if (tty_info->pty_info[*ttyreq - 1].busy)
+ goto out;
+
+ /* the requested tty is available */
+ ttynum = *ttyreq;
+ goto out_tty;
+ }
+
+ /* search for next available tty, fixup index tty1 => [0] */
+ for (ttynum = 1;
+ ttynum <= tty_info->nbtty && tty_info->pty_info[ttynum - 1].busy;
+ ttynum++);
+
+ /* we didn't find any available slot for tty */
+ if (ttynum > tty_info->nbtty)
+ goto out;
+
+ *ttyreq = ttynum;
+
+out_tty:
+ tty_info->pty_info[ttynum - 1].busy = sockfd;
+ masterfd = tty_info->pty_info[ttynum - 1].master;
+out:
+ process_unlock();
+ return masterfd;
+}
+
+/* lxc_console_free: mark the console or a tty as unallocated, free any
+ * resources allocated by lxc_console_allocate().
+ *
+ * @conf : the configuration of the container whose tty was closed
+ * @fd : the socket fd whose remote side was closed, which indicated
+ * the console or tty is no longer in use. this is used to match
+ * which console/tty is being freed.
+ */
+void lxc_console_free(struct lxc_conf *conf, int fd)
{
- if (console->tios &&
+ int i;
+ struct lxc_tty_info *tty_info = &conf->tty_info;
+ struct lxc_console *console = &conf->console;
+
+ process_lock();
+ for (i = 0; i < tty_info->nbtty; i++) {
+ if (tty_info->pty_info[i].busy == fd)
+ tty_info->pty_info[i].busy = 0;
+ }
+
+ if (console->peerpty.busy == fd) {
+ lxc_mainloop_del_handler(console->descr, console->peerpty.slave);
+ lxc_console_peer_proxy_free(console);
+ }
+ process_unlock();
+}
+
+static void lxc_console_peer_default(struct lxc_console *console)
+{
+ struct lxc_tty_state *ts;
+ const char *path = console->path;
+
+ /* if no console was given, try current controlling terminal, there
+ * won't be one if we were started as a daemon (-d)
+ */
+ if (!path && !access("/dev/tty", F_OK)) {
+ int fd;
+ fd = open("/dev/tty", O_RDWR);
+ if (fd >= 0) {
+ close(fd);
+ path = "/dev/tty";
+ }
+ }
+
+ if (!path)
+ goto out;
+
+ DEBUG("opening %s for console peer", path);
+ console->peer = lxc_unpriv(open(path, O_CLOEXEC | O_RDWR | O_CREAT |
+ O_APPEND, 0600));
+ if (console->peer < 0)
+ goto out;
+
+ DEBUG("using '%s' as console", path);
+
+ if (!isatty(console->peer))
+ return;
+
+ ts = lxc_console_sigwinch_init(console->peer, console->master);
+ if (!ts)
+ WARN("Unable to install SIGWINCH");
+ console->tty_state = ts;
+
+ lxc_console_winsz(console->peer, console->master);
+
+ console->tios = malloc(sizeof(*console->tios));
+ if (!console->tios) {
+ SYSERROR("failed to allocate memory");
+ goto err1;
+ }
+
+ if (setup_tios(console->peer, console->tios) < 0)
+ goto err2;
+
+ return;
+
+err2:
+ free(console->tios);
+ console->tios = NULL;
+err1:
+ close(console->peer);
+ console->peer = -1;
+out:
+ DEBUG("no console peer");
+}
+
+void lxc_console_delete(struct lxc_console *console)
+{
+ if (console->tios && console->peer >= 0 &&
tcsetattr(console->peer, TCSAFLUSH, console->tios))
WARN("failed to set old terminal settings");
free(console->tios);
console->slave = -1;
}
-static int console_handler(int fd, void *data, struct lxc_epoll_descr *descr)
+int lxc_console_create(struct lxc_conf *conf)
{
- struct lxc_console *console = (struct lxc_console *)data;
- char buf[1024];
- int r,w;
+ struct lxc_console *console = &conf->console;
- r = read(fd, buf, sizeof(buf));
- if (r < 0) {
+ if (!conf->rootfs.path)
+ return 0;
+
+ if (console->path && !strcmp(console->path, "none"))
+ return 0;
+
+ if (openpty(&console->master, &console->slave,
+ console->name, NULL, NULL)) {
+ SYSERROR("failed to allocate a pty");
+ return -1;
+ }
+
+ if (fcntl(console->master, F_SETFD, FD_CLOEXEC)) {
+ SYSERROR("failed to set console master to close-on-exec");
+ goto err;
+ }
+
+ if (fcntl(console->slave, F_SETFD, FD_CLOEXEC)) {
+ SYSERROR("failed to set console slave to close-on-exec");
+ goto err;
+ }
+
+ lxc_console_peer_default(console);
+
+ if (console->log_path) {
+ console->log_fd = lxc_unpriv(open(console->log_path,
+ O_CLOEXEC | O_RDWR |
+ O_CREAT | O_APPEND, 0600));
+ if (console->log_fd < 0) {
+ SYSERROR("failed to open '%s'", console->log_path);
+ goto err;
+ }
+ DEBUG("using '%s' as console log", console->log_path);
+ }
+
+ return 0;
+
+err:
+ lxc_console_delete(console);
+ return -1;
+}
+
+
+
+static int lxc_console_cb_tty_stdin(int fd, void *cbdata,
+ struct lxc_epoll_descr *descr)
+{
+ struct lxc_tty_state *ts = cbdata;
+ char c;
+
+ assert(fd == ts->stdinfd);
+ if (read(ts->stdinfd, &c, 1) < 0) {
SYSERROR("failed to read");
return 1;
}
- if (!r) {
- INFO("console client has exited");
- lxc_mainloop_del_handler(descr, fd);
- close(fd);
+ /* we want to exit the console with Ctrl+a q */
+ if (c == ts->escape && !ts->saw_escape) {
+ ts->saw_escape = 1;
return 0;
}
- /* no output for the console, do nothing */
- if (console->peer == -1)
- return 0;
+ if (c == 'q' && ts->saw_escape)
+ return 1;
- if (console->peer == fd)
- w = write(console->master, buf, r);
- else {
- w = write(console->peer, buf, r);
- if (console->log_fd > 0)
- w = write(console->log_fd, buf, r);
+ ts->saw_escape = 0;
+ if (write(ts->masterfd, &c, 1) < 0) {
+ SYSERROR("failed to write");
+ return 1;
}
- if (w != r)
- WARN("console short write");
+
return 0;
}
-int lxc_console_mainloop_add(struct lxc_epoll_descr *descr,
- struct lxc_handler *handler)
+static int lxc_console_cb_tty_master(int fd, void *cbdata,
+ struct lxc_epoll_descr *descr)
{
- struct lxc_conf *conf = handler->conf;
- struct lxc_console *console = &conf->console;
+ struct lxc_tty_state *ts = cbdata;
+ char buf[1024];
+ int r,w;
- if (!conf->rootfs.path) {
- INFO("no rootfs, no console.");
- return 0;
+ assert(fd == ts->masterfd);
+ r = read(fd, buf, sizeof(buf));
+ if (r < 0) {
+ SYSERROR("failed to read");
+ return 1;
}
- if (!console->path) {
- INFO("no console specified");
- return 0;
+ w = write(ts->stdoutfd, buf, r);
+ if (w < 0 || w != r) {
+ SYSERROR("failed to write");
+ return 1;
}
- if (console->peer == -1) {
- INFO("no console will be used");
- return 0;
+ return 0;
+}
+
+int lxc_console_getfd(struct lxc_container *c, int *ttynum, int *masterfd)
+{
+ return lxc_cmd_console(c->name, ttynum, masterfd, c->config_path);
+}
+
+int lxc_console(struct lxc_container *c, int ttynum,
+ int stdinfd, int stdoutfd, int stderrfd,
+ int escape)
+{
+ int ret, ttyfd, masterfd;
+ struct lxc_epoll_descr descr;
+ struct termios oldtios;
+ struct lxc_tty_state *ts;
+
+ if (!isatty(stdinfd)) {
+ ERROR("stdin is not a tty");
+ return -1;
}
- if (lxc_mainloop_add_handler(descr, console->master,
- console_handler, console)) {
- ERROR("failed to add to mainloop console handler for '%d'",
- console->master);
+ ret = setup_tios(stdinfd, &oldtios);
+ if (ret) {
+ ERROR("failed to setup tios");
return -1;
}
- if (console->peer != -1 &&
- lxc_mainloop_add_handler(descr, console->peer,
- console_handler, console))
- WARN("console input disabled");
+ process_lock();
+ ttyfd = lxc_cmd_console(c->name, &ttynum, &masterfd, c->config_path);
+ if (ttyfd < 0) {
+ ret = ttyfd;
+ goto err1;
+ }
- return 0;
+ fprintf(stderr, "\n"
+ "Connected to tty %1$d\n"
+ "Type <Ctrl+%2$c q> to exit the console, "
+ "<Ctrl+%2$c Ctrl+%2$c> to enter Ctrl+%2$c itself\n",
+ ttynum, 'a' + escape - 1);
+
+ ret = setsid();
+ if (ret)
+ INFO("already group leader");
+
+ ts = lxc_console_sigwinch_init(stdinfd, masterfd);
+ if (!ts) {
+ ret = -1;
+ goto err2;
+ }
+ ts->escape = escape;
+ ts->winch_proxy = c->name;
+ ts->winch_proxy_lxcpath = c->config_path;
+
+ lxc_console_winsz(stdinfd, masterfd);
+ lxc_cmd_console_winch(ts->winch_proxy, ts->winch_proxy_lxcpath);
+
+ ret = lxc_mainloop_open(&descr);
+ if (ret) {
+ ERROR("failed to create mainloop");
+ goto err3;
+ }
+
+ ret = lxc_mainloop_add_handler(&descr, ts->sigfd,
+ lxc_console_cb_sigwinch_fd, ts);
+ if (ret) {
+ ERROR("failed to add handler for SIGWINCH fd");
+ goto err4;
+ }
+
+ ret = lxc_mainloop_add_handler(&descr, ts->stdinfd,
+ lxc_console_cb_tty_stdin, ts);
+ if (ret) {
+ ERROR("failed to add handler for stdinfd");
+ goto err4;
+ }
+
+ ret = lxc_mainloop_add_handler(&descr, ts->masterfd,
+ lxc_console_cb_tty_master, ts);
+ if (ret) {
+ ERROR("failed to add handler for masterfd");
+ goto err4;
+ }
+
+ process_unlock();
+ ret = lxc_mainloop(&descr, -1);
+ process_lock();
+ if (ret) {
+ ERROR("mainloop returned an error");
+ goto err4;
+ }
+
+ ret = 0;
+
+err4:
+ lxc_mainloop_close(&descr);
+err3:
+ lxc_console_sigwinch_fini(ts);
+err2:
+ close(masterfd);
+ close(ttyfd);
+err1:
+ tcsetattr(stdinfd, TCSAFLUSH, &oldtios);
+ process_unlock();
+
+ return ret;
}
projects / mirror_lxc.git / blobdiff