From: Richard Jones <rjones@redhat.com>
Date: Thu, 9 Sep 2010 21:43:32 +0000 (+0100)
Subject: New APIs: is-chardev, is-blockdev, is-fifo, is-symlink, is-socket
X-Git-Tag: 1.5.10~3
X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=commitdiff_plain;h=43eed091129212dd29996838cf1d76af0f8fc135

New APIs: is-chardev, is-blockdev, is-fifo, is-symlink, is-socket

These complement the existing is-file and is-dir APIs.
---

diff --git a/daemon/is.c b/daemon/is.c
index a16596b..4a834f4 100644
--- a/daemon/is.c
+++ b/daemon/is.c
@@ -41,30 +41,73 @@ do_exists (const char *path)
   return r == 0;
 }
 
+static int get_mode (const char *path, mode_t *mode);
+
 int
 do_is_file (const char *path)
 {
-  int r;
-  struct stat buf;
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISREG (mode);
+}
 
-  CHROOT_IN;
-  r = lstat (path, &buf);
-  CHROOT_OUT;
+int
+do_is_dir (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISDIR (mode);
+}
 
-  if (r == -1) {
-    if (errno != ENOENT && errno != ENOTDIR) {
-      reply_with_perror ("stat: %s", path);
-      return -1;
-    }
-    else
-      return 0;			/* Not a file. */
-  }
+int
+do_is_chardev (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISCHR (mode);
+}
 
-  return S_ISREG (buf.st_mode);
+int
+do_is_blockdev (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISBLK (mode);
 }
 
 int
-do_is_dir (const char *path)
+do_is_fifo (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISFIFO (mode);
+}
+
+int
+do_is_symlink (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISLNK (mode);
+}
+
+int
+do_is_socket (const char *path)
+{
+  mode_t mode;
+  int r = get_mode (path, &mode);
+  if (r <= 0) return r;
+  return S_ISSOCK (mode);
+}
+
+static int
+get_mode (const char *path, mode_t *mode)
 {
   int r;
   struct stat buf;
@@ -79,8 +122,9 @@ do_is_dir (const char *path)
       return -1;
     }
     else
-      return 0;			/* Not a directory. */
+      return 0;			/* Doesn't exist, means return false. */
   }
 
-  return S_ISDIR (buf.st_mode);
+  *mode = buf.st_mode;
+  return 1;
 }
diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR
index c1d1ffb..e6a4f00 100644
--- a/src/MAX_PROC_NR
+++ b/src/MAX_PROC_NR
@@ -1 +1 @@
-266
+271
diff --git a/src/generator.ml b/src/generator.ml
index e2b96c8..da01f12 100755
--- a/src/generator.ml
+++ b/src/generator.ml
@@ -5356,6 +5356,68 @@ filesystem can be found.
 
 To find the label of a filesystem, use C<guestfs_vfs_label>.");
 
+  ("is_chardev", (RBool "flag", [Pathname "path"]), 267, [],
+   [InitISOFS, Always, TestOutputFalse (
+      [["is_chardev"; "/directory"]]);
+    InitBasicFS, Always, TestOutputTrue (
+      [["mknod_c"; "0o777"; "99"; "66"; "/test"];
+       ["is_chardev"; "/test"]])],
+   "test if character device",
+   "\
+This returns C<true> if and only if there is a character device
+with the given C<path> name.
+
+See also C<guestfs_stat>.");
+
+  ("is_blockdev", (RBool "flag", [Pathname "path"]), 268, [],
+   [InitISOFS, Always, TestOutputFalse (
+      [["is_blockdev"; "/directory"]]);
+    InitBasicFS, Always, TestOutputTrue (
+      [["mknod_b"; "0o777"; "99"; "66"; "/test"];
+       ["is_blockdev"; "/test"]])],
+   "test if block device",
+   "\
+This returns C<true> if and only if there is a block device
+with the given C<path> name.
+
+See also C<guestfs_stat>.");
+
+  ("is_fifo", (RBool "flag", [Pathname "path"]), 269, [],
+   [InitISOFS, Always, TestOutputFalse (
+      [["is_fifo"; "/directory"]]);
+    InitBasicFS, Always, TestOutputTrue (
+      [["mkfifo"; "0o777"; "/test"];
+       ["is_fifo"; "/test"]])],
+   "test if FIFO (named pipe)",
+   "\
+This returns C<true> if and only if there is a FIFO (named pipe)
+with the given C<path> name.
+
+See also C<guestfs_stat>.");
+
+  ("is_symlink", (RBool "flag", [Pathname "path"]), 270, [],
+   [InitISOFS, Always, TestOutputFalse (
+      [["is_symlink"; "/directory"]]);
+    InitISOFS, Always, TestOutputTrue (
+      [["is_symlink"; "/abssymlink"]])],
+   "test if symbolic link",
+   "\
+This returns C<true> if and only if there is a symbolic link
+with the given C<path> name.
+
+See also C<guestfs_stat>.");
+
+  ("is_socket", (RBool "flag", [Pathname "path"]), 271, [],
+   (* XXX Need a positive test for sockets. *)
+   [InitISOFS, Always, TestOutputFalse (
+      [["is_socket"; "/directory"]])],
+   "test if socket",
+   "\
+This returns C<true> if and only if there is a Unix domain socket
+with the given C<path> name.
+
+See also C<guestfs_stat>.");
+
 ]
 
 let all_functions = non_daemon_functions @ daemon_functions