New API calls: truncate, truncate_size, mkdir_mode, utimens, lchown.

truncate, truncate_size: Used to truncate files to a particular
size, or to zero bytes.

mkdir_mode: Like mkdir but allows you to also specify the
initial permissions for the new directory.

utimens: Set timestamp on a file with nanosecond accuracy.

lchown: Corresponding to lchown(2) syscall (we already have chown).

The implementation is complicated by the fact that we had to
add an Int64 parameter type to the generator.

1 files changed, 81 insertions, 0 deletions

diff --git a/daemon/utimens.c b/daemon/utimens.c
new file mode 100644
index 00000000..2d0e3bfc
--- /dev/null
+++ b/daemon/utimens.c
@@ -0,0 +1,81 @@
+/* libguestfs - the guestfsd daemon
+ * Copyright (C) 2009 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include "../src/guestfs_protocol.h"
+#include "daemon.h"
+#include "actions.h"
+
+int
+do_utimens (const char *path,
+            int64_t atsecs, int64_t atnsecs,
+            int64_t mtsecs, int64_t mtnsecs)
+{
+#ifndef HAVE_FUTIMENS
+  reply_with_error ("utimens: not supported in this appliance");
+  return -1;
+#else
+  int fd;
+  int r;
+
+  CHROOT_IN;
+  fd = open (path, O_WRONLY | O_NOCTTY);
+  CHROOT_OUT;
+
+  if (fd == -1) {
+    reply_with_perror ("open: %s", path);
+    return -1;
+  }
+
+  if (atnsecs == -1)
+    atnsecs = UTIME_NOW;
+  if (atnsecs == -2)
+    atnsecs = UTIME_OMIT;
+  if (mtnsecs == -1)
+    mtnsecs = UTIME_NOW;
+  if (mtnsecs == -2)
+    mtnsecs = UTIME_OMIT;
+
+  struct timespec times[2];
+  times[0].tv_sec = atsecs;
+  times[0].tv_nsec = atnsecs;
+  times[1].tv_sec = mtsecs;
+  times[1].tv_nsec = mtnsecs;
+
+  r = futimens (fd, times);
+  if (r == -1) {
+    reply_with_perror ("futimens: %s", path);
+    close (fd);
+    return -1;
+  }
+
+  if (close (fd) == -1) {
+    reply_with_perror ("close: %s", path);
+    return -1;
+  }
+
+  return 0;
+#endif /* HAVE_FUTIMENS */
+}