[PATCH v2 08/12] kern: Make grub_error() more verbose

[Javier Martinez Canillas]

From: Peter Jones <address@hidden>

Add file and line to grub_error() output to make troubleshooting easier.

Signed-off-by: Peter Jones <address@hidden>
Signed-off-by: Javier Martinez Canillas <address@hidden>
---

 grub-core/kern/err.c | 13 +++++++++++--
 include/grub/err.h   |  5 ++++-
 2 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/grub-core/kern/err.c b/grub-core/kern/err.c
index 53c734de70e..aebfe0cf839 100644
--- a/grub-core/kern/err.c
+++ b/grub-core/kern/err.c
@@ -33,15 +33,24 @@ static struct grub_error_saved 
grub_error_stack_items[GRUB_ERROR_STACK_SIZE];
 static int grub_error_stack_pos;
 static int grub_error_stack_assert;
 
+#ifdef grub_error
+#undef grub_error
+#endif
+
 grub_err_t
-grub_error (grub_err_t n, const char *fmt, ...)
+grub_error (grub_err_t n, const char *file, const int line, const char *fmt, 
...)
 {
   va_list ap;
+  int m;
 
   grub_errno = n;
 
+  m = grub_snprintf (grub_errmsg, sizeof (grub_errmsg), "%s:%d:", file, line);
+  if (m < 0)
+    m = 0;
+
   va_start (ap, fmt);
-  grub_vsnprintf (grub_errmsg, sizeof (grub_errmsg), _(fmt), ap);
+  grub_vsnprintf (grub_errmsg + m, sizeof (grub_errmsg) - m, _(fmt), ap);
   va_end (ap);
 
   return n;
diff --git a/include/grub/err.h b/include/grub/err.h
index 24ba9f5f592..b68bbec3c72 100644
--- a/include/grub/err.h
+++ b/include/grub/err.h
@@ -85,7 +85,10 @@ struct grub_error_saved
 extern grub_err_t EXPORT_VAR(grub_errno);
 extern char EXPORT_VAR(grub_errmsg)[GRUB_MAX_ERRMSG];
 
-grub_err_t EXPORT_FUNC(grub_error) (grub_err_t n, const char *fmt, ...);
+grub_err_t EXPORT_FUNC(grub_error) (grub_err_t n, const char *file, const int 
line, const char *fmt, ...);
+
+#define grub_error(n, fmt, ...) grub_error (n, __FILE__, __LINE__, fmt, 
##__VA_ARGS__)
+
 void EXPORT_FUNC(grub_fatal) (const char *fmt, ...) __attribute__ ((noreturn));
 void EXPORT_FUNC(grub_error_push) (void);
 int EXPORT_FUNC(grub_error_pop) (void);
-- 
2.24.1