fish: Add 'display' command for displaying graphical files.

[libguestfs.git] / fish / display.c

diff --git a/fish/display.c b/fish/display.c
new file mode 100644 (file)
index 0000000..4a46ea8
--- /dev/null
+++ b/fish/display.c
@@ -0,0 +1,95 @@
+/* guestfish - the filesystem interactive shell
+ * Copyright (C) 2011 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 <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "fish.h"
+
+int
+run_display (const char *cmd, size_t argc, char *argv[])
+{
+  TMP_TEMPLATE_ON_STACK (filename);
+  char *remote;
+  const char *display;
+  char buf[256];
+  int r, fd;
+
+  if (argc != 1) {
+    fprintf (stderr, _("display filename\n"));
+    return -1;
+  }
+
+  /* Choose a display command. */
+  display = getenv ("GUESTFISH_DISPLAY_IMAGE");
+  if (display == NULL)
+    display = "display";
+
+  remote = argv[0];
+
+  /* Allow win:... prefix on remote. */
+  remote = win_prefix (remote);
+  if (remote == NULL)
+    return -1;
+
+  /* Download the file and write it to a temporary. */
+  fd = mkstemp (filename);
+  if (fd == -1) {
+    perror ("mkstemp");
+    free (remote);
+    return -1;
+  }
+
+  snprintf (buf, sizeof buf, "/dev/fd/%d", fd);
+
+  if (guestfs_download (g, remote, buf) == -1) {
+    close (fd);
+    unlink (filename);
+    free (remote);
+    return -1;
+  }
+
+  if (close (fd) == -1) {
+    perror (filename);
+    unlink (filename);
+    free (remote);
+    return -1;
+  }
+
+  /* View it. */
+  snprintf (buf, sizeof buf, "%s %s", display, filename);
+
+  r = system (buf);
+  unlink (filename);
+  if (r != 0) {
+    perror (buf);
+    free (remote);
+    return -1;
+  }
+
+  free (remote);
+  return 0;
+}