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lxc-execute: find lxc-init

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lxc-init used to be under /usr/lib/lxc.  Now it is under
/usr/lib/<multiarch>/lxc, but old containers will still have it under
/usr/lib/lxc.  So search for a valid lxc-init to run.

Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
This commit is contained in:
Serge Hallyn 2012-07-31 16:04:33 +02:00 committed by Daniel Lezcano
parent d1252b8425
commit a0a2066d93
1 changed files with 39 additions and 1 deletions
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40
src/lxc/execute.c
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@ -21,10 +21,13 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <unistd.h>
#include <stdlib.h>
#include "log.h"
#include "start.h"
@ -35,12 +38,42 @@ struct execute_args {
int quiet;
};
/* historically lxc-init has been under /usr/lib/lxc. Now with
* multi-arch it can be under /usr/lib/$ARCH/lxc. Serge thinks
* it makes more sense to put it under /sbin.
* If /usr/lib/$ARCH/lxc exists and is used, then LXCINITDIR will
* point to it.
*/
static char *choose_init(void)
{
char *retv = malloc(PATH_MAX);
int ret;
struct stat mystat;
if (!retv)
return NULL;
snprintf(retv, PATH_MAX-1, LXCINITDIR "/lxc/lxc-init");
ret = stat(retv, &mystat);
if (ret == 0)
return retv;
snprintf(retv, PATH_MAX-1, "/usr/lib/lxc/lxc-init");
ret = stat(retv, &mystat);
if (ret == 0)
return retv;
snprintf(retv, PATH_MAX-1, "/sbin/lxc-init");
ret = stat(retv, &mystat);
if (ret == 0)
return retv;
return NULL;
}
static int execute_start(struct lxc_handler *handler, void* data)
{
int j, i = 0;
struct execute_args *my_args = data;
char **argv;
int argc = 0;
char *initpath;
while (my_args->argv[argc++]);
@ -48,7 +81,12 @@ static int execute_start(struct lxc_handler *handler, void* data)
if (!argv)
return 1;
argv[i++] = LXCINITDIR "/lxc-init";
initpath = choose_init();
if (!initpath) {
ERROR("Failed to find an lxc-init");
return 1;
}
argv[i++] = initpath;
if (my_args->quiet)
argv[i++] = "--quiet";
argv[i++] = "--";