diff options
| -rw-r--r-- | test/nstool.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/test/nstool.c b/test/nstool.c index 2682c6b..fccbfb9 100644 --- a/test/nstool.c +++ b/test/nstool.c @@ -12,6 +12,7 @@ #include <stdlib.h> #include <string.h> #include <stdbool.h> +#include <stdint.h> #include <errno.h> #include <unistd.h> #include <getopt.h> @@ -45,7 +46,10 @@ const struct ns_type nstypes[] = { { CLONE_NEWUTS, "uts" }, }; +#define NSTOOL_MAGIC 0x7570017575601d75ULL + struct holder_info { + uint64_t magic; pid_t pid; uid_t uid; gid_t gid; @@ -104,6 +108,10 @@ static int connect_ctl(const char *sockpath, bool wait, if ((size_t)len < sizeof(*info)) die("short read() on control socket %s\n", sockpath); + if (info->magic != NSTOOL_MAGIC) + die("Control socket %s doesn't appear to belong to nstool\n", + sockpath); + if (peercred) { socklen_t optlen = sizeof(*peercred); @@ -143,6 +151,7 @@ static void cmd_hold(int argc, char *argv[]) if (rc < 0) die("listen() on %s: %s\n", sockpath, strerror(errno)); + info.magic = NSTOOL_MAGIC; info.pid = getpid(); info.uid = getuid(); info.gid = getgid(); |