fuse: Add guestunmount program to handle unmounting (RHBZ#916780).

2026-03-21 22:53:37 +00:00 · 2013-03-04 18:47:05 +00:00
parent 09442d0588
commit 3e9e40aee3
19 changed files with 838 additions and 165 deletions
--- a/fuse/test-guestunmount-fd.c
+++ b/fuse/test-guestunmount-fd.c
@@ -0,0 +1,122 @@
+/* libguestfs
+ * Copyright (C) 2013 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/* Test the guestunmount --fd flag.  Note this is done without
+ * requiring libguestfs or guestmount.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include "guestfs.h"
+#include "guestfs-internal-frontend.h"
+
+static void display_exit_status (int status, FILE *fp);
+
+int
+main (int argc, char *argv[])
+{
+  int pipefd[2];
+  pid_t pid;
+  int r, status;
+
+  /* Create the pipe. */
+  if (pipe (pipefd) == -1) {
+    perror ("pipe");
+    exit (EXIT_FAILURE);
+  }
+
+  /* Create the guestunmount subprocess. */
+  pid = fork ();
+  if (pid == -1) {
+    perror ("fork");
+    exit (EXIT_FAILURE);
+  }
+
+  if (pid == 0) {               /* child - guestunmount */
+    char fd_str[64];
+
+    close (pipefd[1]);
+
+    snprintf (fd_str, sizeof fd_str, "%d", pipefd[0]);
+
+    execlp ("./guestunmount", "guestunmount", "--fd", fd_str, "/", NULL);
+    perror ("execlp");
+    _exit (EXIT_FAILURE);
+  }
+
+  /* Parent continues. */
+  close (pipefd[0]);
+
+  /* Sleep a bit and test that the guestunmount process is still running. */
+  sleep (2);
+
+  r = waitpid (pid, &status, WNOHANG);
+  if (r == -1) {
+    perror ("waitpid");
+    exit (EXIT_FAILURE);
+  }
+  if (r != 0) {
+    fprintf (stderr, "%s: test failed: guestunmount unexpectedly ", argv[0]);
+    display_exit_status (status, stderr);
+    fputc ('\n', stderr);
+    exit (EXIT_FAILURE);
+  }
+
+  /* Close the write side of the pipe.  This should cause guestunmount
+   * to exit.  It should exit with status code _2_ because we gave it
+   * a mountpoint which isn't a FUSE mountpoint.
+   */
+  close (pipefd[1]);
+
+  r = waitpid (pid, &status, 0);
+  if (r == -1) {
+    perror ("waitpid");
+    exit (EXIT_FAILURE);
+  }
+  if (!WIFEXITED (status) || WEXITSTATUS (status) != 2) {
+    fprintf (stderr, "%s: test failed: guestunmount didn't return status code 2; instead it ", argv[0]);
+    display_exit_status (status, stderr);
+    fputc ('\n', stderr);
+    exit (EXIT_FAILURE);
+  }
+
+  exit (EXIT_SUCCESS);
+}
+
+static void
+display_exit_status (int status, FILE *fp)
+{
+  if (WIFEXITED (status))
+    fprintf (fp, "exited with status code %d", WEXITSTATUS (status));
+  else if (WIFSIGNALED (status)) {
+    fprintf (fp, "exited on signal %d", WTERMSIG (status));
+    if (WCOREDUMP (status))
+      fprintf (fp, " and dumped core");
+  }
+  else if (WIFSTOPPED (status))
+    fprintf (fp, "stopped on signal %d", WSTOPSIG (status));
+  else
+    fprintf (fp, "<< unknown status %d >>", status);
+}