X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=src%2Flaunch.c;h=03ad39b4b3b61df873ea9d13fa1740bde8efd1ba;hb=6146412f06c2f6f33c3ea7d571f16d4fe71dddb2;hp=234f42e40f9398f771dec93bb6af1028b41eaba4;hpb=635af5be04265f845186b40e9a9fe7b102ad6909;p=libguestfs.git

diff --git a/src/launch.c b/src/launch.c
index 234f42e..03ad39b 100644
--- a/src/launch.c
+++ b/src/launch.c
@@ -1058,6 +1058,7 @@ print_qemu_command_line (guestfs_h *g, char **argv)
   }
 }
 
+static int test_qemu_cmd (guestfs_h *g, const char *cmd, char **ret);
 static int read_all (guestfs_h *g, FILE *fp, char **ret);
 
 /* Test qemu binary (or wrapper) runs, and do 'qemu -help' and
@@ -1070,38 +1071,49 @@ test_qemu (guestfs_h *g)
   char cmd[1024];
   FILE *fp;
 
+  free (g->qemu_help);
+  g->qemu_help = NULL;
+  free (g->qemu_version);
+  g->qemu_version = NULL;
+
   snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -help", g->qemu);
 
-  fp = popen (cmd, "r");
   /* qemu -help should always work (qemu -version OTOH wasn't
    * supported by qemu 0.9).  If this command doesn't work then it
    * probably indicates that the qemu binary is missing.
    */
-  if (!fp) {
-    /* XXX This error is never printed, even if the qemu binary
-     * doesn't exist.  Why?
-     */
-  error:
-    perrorf (g, _("%s: command failed: If qemu is located on a non-standard path, try setting the LIBGUESTFS_QEMU environment variable."), cmd);
+  if (test_qemu_cmd (g, cmd, &g->qemu_help) == -1) {
+    error (g, _("command failed: %s\n\nIf qemu is located on a non-standard path, try setting the LIBGUESTFS_QEMU\nenvironment variable.  There may also be errors printed above."),
+           cmd);
     return -1;
   }
 
-  if (read_all (g, fp, &g->qemu_help) == -1)
-    goto error;
-
-  if (pclose (fp) == -1)
-    goto error;
-
   snprintf (cmd, sizeof cmd, "LC_ALL=C '%s' -nographic -version 2>/dev/null",
             g->qemu);
 
+  /* Intentionally ignore errors from qemu -version. */
+  ignore_value (test_qemu_cmd (g, cmd, &g->qemu_version));
+
+  return 0;
+}
+
+static int
+test_qemu_cmd (guestfs_h *g, const char *cmd, char **ret)
+{
+  FILE *fp;
+
   fp = popen (cmd, "r");
-  if (fp) {
-    /* Intentionally ignore errors. */
-    read_all (g, fp, &g->qemu_version);
+  if (fp == NULL)
+    return -1;
+
+  if (read_all (g, fp, ret) == -1) {
     pclose (fp);
+    return -1;
   }
 
+  if (pclose (fp) != 0)
+    return -1;
+
   return 0;
 }