From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Peter Jones <pjones@redhat.com>

Date: Tue, 9 Jul 2019 10:35:16 +0200

Subject: [PATCH] Try $prefix if $fw_path doesn't work.

Related: rhbz#1148652

Signed-off-by: Peter Jones <pjones@redhat.com>

---

 grub-core/kern/ieee1275/init.c |  28 +++++----

 grub-core/net/net.c            |   2 +-

 grub-core/normal/main.c        | 134 ++++++++++++++++++++---------------------

 3 files changed, 82 insertions(+), 82 deletions(-)

diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c

index e71d158416..0cd2a62723 100644

--- a/grub-core/kern/ieee1275/init.c

+++ b/grub-core/kern/ieee1275/init.c

@@ -127,23 +127,25 @@ grub_machine_get_bootlocation (char **device, char **path)

       grub_free (canon);

     }

   else

-    *device = grub_ieee1275_encode_devname (bootpath);

-  grub_free (type);

-

-  filename = grub_ieee1275_get_filename (bootpath);

-  if (filename)

     {

-      char *lastslash = grub_strrchr (filename, '\\');

-

-      /* Truncate at last directory.  */

-      if (lastslash)

+      filename = grub_ieee1275_get_filename (bootpath);

+      if (filename)

         {

-	  *lastslash = '\0';

-	  grub_translate_ieee1275_path (filename);

+          char *lastslash = grub_strrchr (filename, '\\');

-	  *path = filename;

-	}

+          /* Truncate at last directory.  */

+          if (lastslash)

+            {

+              *lastslash = '\0';

+              grub_translate_ieee1275_path (filename);

+

+              *path = filename;

+            }

+        }

+      *device = grub_ieee1275_encode_devname (bootpath);

     }

+

+  grub_free (type);

   grub_free (bootpath);

 }

diff --git a/grub-core/net/net.c b/grub-core/net/net.c

index 4d3eb5c1a5..0ef148f4ad 100644

--- a/grub-core/net/net.c

+++ b/grub-core/net/net.c

@@ -1869,7 +1869,7 @@ grub_net_search_config_file (char *config)

   /* Remove the remaining minus sign at the end. */

   config[config_len] = '\0';

-  return GRUB_ERR_NONE;

+  return GRUB_ERR_FILE_NOT_FOUND;

 }

 static struct grub_preboot *fini_hnd;

diff --git a/grub-core/normal/main.c b/grub-core/normal/main.c

index 1e509fceb9..d5968797f4 100644

--- a/grub-core/normal/main.c

+++ b/grub-core/normal/main.c

@@ -337,81 +337,79 @@ grub_enter_normal_mode (const char *config)

   grub_boot_time ("Exiting normal mode");

 }

+static grub_err_t

+grub_try_normal (const char *variable)

+{

+    char *config;

+    const char *prefix;

+    grub_err_t err = GRUB_ERR_FILE_NOT_FOUND;

+    const char *net_search_cfg;

+    int disable_net_search = 0;

+

+    prefix = grub_env_get (variable);

+    if (!prefix)

+      return GRUB_ERR_FILE_NOT_FOUND;

+

+    net_search_cfg = grub_env_get ("feature_net_search_cfg");

+    if (net_search_cfg && net_search_cfg[0] == 'n')

+      disable_net_search = 1;

+

+    if (grub_strncmp (prefix + 1, "tftp", sizeof ("tftp") - 1) == 0 &&

+        !disable_net_search)

+      {

+       grub_size_t config_len;

+       config_len = grub_strlen (prefix) +

+         sizeof ("/grub.cfg-XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX");

+       config = grub_malloc (config_len);

+

+       if (! config)

+         return GRUB_ERR_FILE_NOT_FOUND;

+

+       grub_snprintf (config, config_len, "%s/grub.cfg", prefix);

+       err = grub_net_search_config_file (config);

+      }

+

+    if (err != GRUB_ERR_NONE)

+      {

+       config = grub_xasprintf ("%s/grub.cfg", prefix);

+       if (config)

+         {

+           grub_file_t file;

+           file = grub_file_open (config, GRUB_FILE_TYPE_CONFIG);

+           if (file)

+             {

+               grub_file_close (file);

+               err = GRUB_ERR_NONE;

+             }

+         }

+      }

+

+    if (err == GRUB_ERR_NONE)

+      grub_enter_normal_mode (config);

+

+    grub_errno = 0;

+    grub_free (config);

+    return err;

+}

+

 /* Enter normal mode from rescue mode.  */

 static grub_err_t

 grub_cmd_normal (struct grub_command *cmd __attribute__ ((unused)),

 		 int argc, char *argv[])

 {

-  if (argc == 0)

-    {

-      /* Guess the config filename. It is necessary to make CONFIG static,

-	 so that it won't get broken by longjmp.  */

-      char *config;

-      const char *prefix;

-      const char *net_search_cfg;

-      int disable_net_search = 0;

-

-      prefix = grub_env_get ("fw_path");

-      if (! prefix)

-	      prefix = grub_env_get ("prefix");

-

-      net_search_cfg = grub_env_get ("feature_net_search_cfg");

-      if (net_search_cfg && net_search_cfg[0] == 'n')

-	      disable_net_search = 1;

-

-      if (prefix)

-        {

-          if (grub_strncmp (prefix + 1, "tftp", sizeof ("tftp") - 1) == 0 &&

-              !disable_net_search)

-            {

-              grub_size_t config_len;

-              config_len = grub_strlen (prefix) +

-                sizeof ("/grub.cfg-XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX");

-              config = grub_malloc (config_len);

-

-              if (! config)

-                goto quit;

-

-              grub_snprintf (config, config_len, "%s/grub.cfg", prefix);

-

-              grub_net_search_configfile (config);

-

-              grub_enter_normal_mode (config);

-              grub_free (config);

-              config = NULL;

-            }

-

-          if (!config)

-            {

-              config = grub_xasprintf ("%s/grub.cfg", prefix);

-              if (config)

-                {

-                  grub_file_t file;

-

-                  file = grub_file_open (config, GRUB_FILE_TYPE_CONFIG);

-                  if (file)

-                    {

-                      grub_file_close (file);

-                      grub_enter_normal_mode (config);

-                    }

-                  else

-                    {

-                      /*  Ignore all errors.  */

-                      grub_errno = 0;

-                    }

-                  grub_free (config);

-                }

-            }

-        }

-      else

-        {

-          grub_enter_normal_mode (0);

-        }

-    }

-  else

+  if (argc)

     grub_enter_normal_mode (argv[0]);

+  else

+    {

+      /* Guess the config filename. */

+      grub_err_t err;

+      err = grub_try_normal ("fw_path");

+      if (err == GRUB_ERR_FILE_NOT_FOUND)

+        err = grub_try_normal ("prefix");

+      if (err == GRUB_ERR_FILE_NOT_FOUND)

+        grub_enter_normal_mode (0);

+    }

-quit:

   return 0;

 }