mkfs-opts: Add optional "features" parameter.

[libguestfs.git] / src / launch.c

diff --git a/src/launch.c b/src/launch.c
index 047a1e1..a7a86b9 100644 (file)
--- a/src/launch.c
+++ b/src/launch.c
@@ -34,6 +34,7 @@
 #include <sys/select.h>
 #include <dirent.h>
 #include <signal.h>
+#include <assert.h>
 
 #include <rpc/types.h>
 #include <rpc/xdr.h>
@@ -101,6 +102,49 @@ add_cmdline (guestfs_h *g, const char *str)
 }
 
 int
+guestfs___checkpoint_cmdline (guestfs_h *g)
+{
+  return g->cmdline_size;
+}
+
+void
+guestfs___rollback_cmdline (guestfs_h *g, int pos)
+{
+  int i;
+
+  assert (g->cmdline_size >= pos);
+
+  for (i = g->cmdline_size - 1; i >= pos; --i)
+    free (g->cmdline[i]);
+
+  g->cmdline_size = pos;
+}
+
+/* Internal command to return the command line. */
+char **
+guestfs__debug_cmdline (guestfs_h *g)
+{
+  int i;
+  char **r;
+
+  if (g->cmdline == NULL) {
+    r = safe_malloc (g, sizeof (char *) * 1);
+    r[0] = NULL;
+    return r;
+  }
+
+  r = safe_malloc (g, sizeof (char *) * (g->cmdline_size + 1));
+  r[0] = safe_strdup (g, g->qemu); /* g->cmdline[0] is always NULL */
+
+  for (i = 1; i < g->cmdline_size; ++i)
+    r[i] = safe_strdup (g, g->cmdline[i]);
+
+  r[g->cmdline_size] = NULL;
+
+  return r;                     /* caller frees */
+}
+
+int
 guestfs__config (guestfs_h *g,
                  const char *qemu_param, const char *qemu_value)
 {
@@ -302,14 +346,12 @@ guestfs__add_cdrom (guestfs_h *g, const char *filename)
 }
 
 static int is_openable (guestfs_h *g, const char *path, int flags);
-static void print_cmdline (guestfs_h *g);
 
 int
 guestfs__launch (guestfs_h *g)
 {
   int r;
   int wfd[2], rfd[2];
-  int tries;
   char unixsock[256];
   struct sockaddr_un addr;
 
@@ -546,7 +588,7 @@ guestfs__launch (guestfs_h *g)
     g->cmdline[g->cmdline_size-1] = NULL;
 
     if (g->verbose)
-      print_cmdline (g);
+      guestfs___print_timestamped_argv (g, (const char **)g->cmdline);
 
     if (!g->direct) {
       /* Set up stdin, stdout. */
@@ -728,6 +770,7 @@ guestfs__launch (guestfs_h *g)
 
 /* Return the location of the tmpdir (eg. "/tmp") and allow users
  * to override it at runtime using $TMPDIR.
+ * http://www.pathname.com/fhs/pub/fhs-2.3.html#TMPTEMPORARYFILES
  */
 const char *
 guestfs_tmpdir (void)
@@ -746,31 +789,21 @@ guestfs_tmpdir (void)
   return tmpdir;
 }
 
-/* This function is used to print the qemu command line before it gets
- * executed, when in verbose mode.
+/* Return the location of the persistent tmpdir (eg. "/var/tmp") and
+ * allow users to override it at runtime using $TMPDIR.
+ * http://www.pathname.com/fhs/pub/fhs-2.3.html#VARTMPTEMPORARYFILESPRESERVEDBETWEE
  */
-static void
-print_cmdline (guestfs_h *g)
+const char *
+guestfs___persistent_tmpdir (void)
 {
-  int i = 0;
-  int needs_quote;
-
-  while (g->cmdline[i]) {
-    if (g->cmdline[i][0] == '-') /* -option starts a new line */
-      fprintf (stderr, " \\\n   ");
-
-    if (i > 0) fputc (' ', stderr);
+  const char *tmpdir;
 
-    /* Does it need shell quoting?  This only deals with simple cases. */
-    needs_quote = strcspn (g->cmdline[i], " ") != strlen (g->cmdline[i]);
+  tmpdir = "/var/tmp";
 
-    if (needs_quote) fputc ('\'', stderr);
-    fprintf (stderr, "%s", g->cmdline[i]);
-    if (needs_quote) fputc ('\'', stderr);
-    i++;
-  }
+  const char *t = getenv ("TMPDIR");
+  if (t) tmpdir = t;
 
-  fputc ('\n', stderr);
+  return tmpdir;
 }
 
 /* Compute Y - X and return the result in milliseconds.
@@ -788,6 +821,34 @@ timeval_diff (const struct timeval *x, const struct timeval *y)
 }
 
 void
+guestfs___print_timestamped_argv (guestfs_h *g, const char * argv[])
+{
+  int i = 0;
+  int needs_quote;
+
+  struct timeval tv;
+  gettimeofday (&tv, NULL);
+  fprintf (stderr, "[%05" PRIi64 "ms] ", timeval_diff (&g->launch_t, &tv));
+
+  while (argv[i]) {
+    if (argv[i][0] == '-') /* -option starts a new line */
+      fprintf (stderr, " \\\n   ");
+
+    if (i > 0) fputc (' ', stderr);
+
+    /* Does it need shell quoting?  This only deals with simple cases. */
+    needs_quote = strcspn (argv[i], " ") != strlen (argv[i]);
+
+    if (needs_quote) fputc ('\'', stderr);
+    fprintf (stderr, "%s", argv[i]);
+    if (needs_quote) fputc ('\'', stderr);
+    i++;
+  }
+
+  fputc ('\n', stderr);
+}
+
+void
 guestfs___print_timestamped_message (guestfs_h *g, const char *fs, ...)
 {
   va_list args;