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link /dev/kmsg to /dev/console in the container

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This way init log messages can be seen on the console.  If containerized
syslog ever comes around, we can get rid of this.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
This commit is contained in:
Serge Hallyn 2012-09-13 09:39:07 -05:00 committed by Stéphane Graber
parent 5d38621d0b
commit 1bd051a6b0
1 changed files with 30 additions and 0 deletions
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30
src/lxc/conf.c
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@ -1055,6 +1055,31 @@ static int setup_console(const struct lxc_rootfs *rootfs,
return setup_ttydir_console(rootfs, console, ttydir);
}
static int setup_kmsg(const struct lxc_rootfs *rootfs,
const struct lxc_console *console)
{
char kpath[MAXPATHLEN];
int ret;
ret = snprintf(kpath, sizeof(kpath), "%s/dev/kmsg", rootfs->mount);
if (ret < 0 || ret >= sizeof(kpath))
return -1;
ret = unlink(kpath);
if (ret && errno != ENOENT) {
SYSERROR("error unlinking %s\n", kpath);
return -1;
}
ret = symlink("console", kpath);
if (ret) {
SYSERROR("failed to create symlink for kmsg");
return -1;
}
return 0;
}
static int setup_cgroup(const char *name, struct lxc_list *cgroups)
{
struct lxc_list *iterator;
@ -2167,6 +2192,11 @@ int lxc_setup(const char *name, struct lxc_conf *lxc_conf)
return -1;
}
if (setup_kmsg(&lxc_conf->rootfs, &lxc_conf->console)) {
ERROR("failed to setup kmsg for '%s'", name);
return -1;
}
if (setup_tty(&lxc_conf->rootfs, &lxc_conf->tty_info, lxc_conf->ttydir)) {
ERROR("failed to setup the ttys for '%s'", name);
return -1;