rootless: force same cwd when re-execing
when joining an existing namespace, we were not maintaining the
current working directory, causing commands like export -o to fail
when they weren't referring to absolute paths.
Closes:
@@ -109,6 +109,13 @@ reexec_userns_join (int userns, int mountns)
char uid[16];
char **argv;
int pid;
+ char *cwd = getcwd (NULL, 0);
+
+ if (cwd == NULL)
+ {
+ fprintf (stderr, "error getting current working directory: %s\n", strerror (errno));
+ _exit (EXIT_FAILURE);
+ }
sprintf (uid, "%d", geteuid ());
@@ -154,6 +161,13 @@ reexec_userns_join (int userns, int mountns)
_exit (EXIT_FAILURE);
}
+ if (chdir (cwd) < 0)
+ {
+ fprintf (stderr, "cannot chdir: %s\n", strerror (errno));
+ _exit (EXIT_FAILURE);
+ }
+ free (cwd);
+
execvp (argv[0], argv);
_exit (EXIT_FAILURE);
@@ -190,6 +204,13 @@ reexec_in_user_namespace (int ready)
char *listen_fds = NULL;
char *listen_pid = NULL;
bool do_socket_activation = false;
+ char *cwd = getcwd (NULL, 0);
+
+ if (cwd == NULL)
+ {
+ fprintf (stderr, "error getting current working directory: %s\n", strerror (errno));
+ _exit (EXIT_FAILURE);
+ }
listen_pid = getenv("LISTEN_PID");
listen_fds = getenv("LISTEN_FDS");
@@ -265,6 +286,13 @@ reexec_in_user_namespace (int ready)
_exit (EXIT_FAILURE);
}
+ if (chdir (cwd) < 0)
+ {
+ fprintf (stderr, "cannot chdir: %s\n", strerror (errno));
+ _exit (EXIT_FAILURE);
+ }
+ free (cwd);
+
execvp (argv[0], argv);
_exit (EXIT_FAILURE);
