#include "common/gdb_wait.h"
#include <signal.h>
#include <sched.h>
+#include "common/scope-exit.h"
/* See nat/linux-namespaces.h. */
int debug_linux_namespaces;
static enum mnsh_fs_code
linux_mntns_access_fs (pid_t pid)
{
- struct cleanup *old_chain;
struct linux_ns *ns;
struct stat sb;
struct linux_mnsh *helper;
ssize_t size;
- int fd, saved_errno;
+ int fd;
if (pid == getpid ())
return MNSH_FS_DIRECT;
if (ns == NULL)
return MNSH_FS_DIRECT;
- old_chain = make_cleanup (null_cleanup, NULL);
-
fd = gdb_open_cloexec (linux_ns_filename (ns, pid), O_RDONLY, 0);
if (fd < 0)
- goto error;
+ return MNSH_FS_ERROR;
- make_cleanup_close (fd);
+ SCOPE_EXIT
+ {
+ int save_errno = errno;
+ close (fd);
+ errno = save_errno;
+ };
if (fstat (fd, &sb) != 0)
- goto error;
+ return MNSH_FS_ERROR;
if (sb.st_ino == ns->id)
- {
- do_cleanups (old_chain);
-
- return MNSH_FS_DIRECT;
- }
+ return MNSH_FS_DIRECT;
helper = linux_mntns_get_helper ();
if (helper == NULL)
- goto error;
+ return MNSH_FS_ERROR;
if (sb.st_ino != helper->nsid)
{
size = mnsh_send_setns (helper, fd, 0);
if (size < 0)
- goto error;
+ return MNSH_FS_ERROR;
if (mnsh_recv_int (helper, &result, &error) != 0)
- goto error;
+ return MNSH_FS_ERROR;
if (result != 0)
{
error = ENOTSUP;
errno = error;
- goto error;
+ return MNSH_FS_ERROR;
}
helper->nsid = sb.st_ino;
}
- do_cleanups (old_chain);
-
return MNSH_FS_HELPER;
-
-error:
- saved_errno = errno;
-
- do_cleanups (old_chain);
-
- errno = saved_errno;
- return MNSH_FS_ERROR;
}
/* See nat/linux-namespaces.h. */