Remove temporary directory containing arbitrary files.

In preparation for caching inspection information in the temporary
directory (g->tmpdir), allow the temporary directory to contain
arbitrary files, and remove all of them when the handle is closed.

This just generalizes the previous method of cleaning up the tmpdir.
(cherry picked from commit 70975981bed8e0c01b5966c10b507bb82086e5f8)

diff --git a/src/guestfs.c b/src/guestfs.c
index 9c4f22f..206841e 100644 (file)
--- a/src/guestfs.c
+++ b/src/guestfs.c
@@ -72,6 +72,7 @@
 #include "guestfs_protocol.h"
 
 static void default_error_cb (guestfs_h *g, void *data, const char *msg);
+static void remove_tmpdir (guestfs_h *g);
 static void close_handles (void);
 
 gl_lock_define_initialized (static, handles_lock);
@@ -215,15 +216,8 @@ guestfs_close (guestfs_h *g)
   if (g->pid > 0) waitpid (g->pid, NULL, 0);
   if (g->recoverypid > 0) waitpid (g->recoverypid, NULL, 0);
 
-  /* Remove tmpfiles. */
-  if (g->tmpdir) {
-    snprintf (filename, sizeof filename, "%s/guestfsd.sock", g->tmpdir);
-    unlink (filename);
-
-    rmdir (g->tmpdir);
-
-    free (g->tmpdir);
-  }
+  /* Remove whole temporary directory. */
+  remove_tmpdir (g);
 
   if (g->cmdline) {
     for (i = 0; i < g->cmdline_size; ++i)
@@ -255,6 +249,43 @@ guestfs_close (guestfs_h *g)
   free (g);
 }
 
+/* g->tmpdir can contain any files (but not subdirectories).  Remove
+ * those and the directory itself.  Note that errors in this function
+ * aren't really that important: if we end up not deleting temporary
+ * files it's only annoying.
+ */
+static void
+remove_tmpdir (guestfs_h *g)
+{
+  DIR *dir;
+  struct dirent *d;
+
+  if (!g->tmpdir)
+    return;
+
+  dir = opendir (g->tmpdir);
+  if (dir == NULL) {
+    perror (g->tmpdir);
+    return;
+  }
+
+  while ((d = readdir (dir)) != NULL) {
+    if (STRNEQ (d->d_name, ".") && STRNEQ (d->d_name, "..")) {
+      if (unlinkat (dirfd (dir), d->d_name, 0) == -1)
+        perror (d->d_name);
+    }
+  }
+
+  if (closedir (dir) == -1)
+    perror (g->tmpdir);
+
+  if (rmdir (g->tmpdir) == -1)
+    perror (g->tmpdir);
+
+  free (g->tmpdir);
+  g->tmpdir = NULL;
+}
+
 /* Close all open handles (called from atexit(3)). */
 static void
 close_handles (void)