It makes sense to print the error message while reading
file failed.

Signed-off-by: Li Qiang <liq3ea@163.com>
---
 vl.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/vl.c b/vl.c
index cc55fe04a2..3db410e771 100644
--- a/vl.c
+++ b/vl.c
@@ -2207,8 +2207,9 @@ static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
         size = strlen(str); /* NUL terminator NOT included in fw_cfg blob */
         buf = g_memdup(str, size);
     } else {
-        if (!g_file_get_contents(file, &buf, &size, NULL)) {
-            error_report("can't load %s", file);
+        GError *error = NULL;
+        if (!g_file_get_contents(file, &buf, &size, &error)) {
+            error_report("can't load %s, %s", file, error->message);
             return -1;
         }
     }
-- 
2.17.1

On 10/7/18 6:33 AM, Li Qiang wrote:
> It makes sense to print the error message while reading
> file failed.
> 
> Signed-off-by: Li Qiang <liq3ea@163.com>
> ---
>  vl.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/vl.c b/vl.c
> index cc55fe04a2..3db410e771 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2207,8 +2207,9 @@ static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
>          size = strlen(str); /* NUL terminator NOT included in fw_cfg blob */
>          buf = g_memdup(str, size);
>      } else {
> -        if (!g_file_get_contents(file, &buf, &size, NULL)) {
> -            error_report("can't load %s", file);
> +        GError *error = NULL;
> +        if (!g_file_get_contents(file, &buf, &size, &error)) {
> +            error_report("can't load %s, %s", file, error->message);

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

>              return -1;
>          }
>      }
>

Hi Li,

On Sun, Oct 7, 2018 at 7:48 PM Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
> On 10/7/18 6:33 AM, Li Qiang wrote:
> > It makes sense to print the error message while reading
> > file failed.
> >
> > Signed-off-by: Li Qiang <liq3ea@163.com>
> > ---
> >  vl.c | 5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> >
> > diff --git a/vl.c b/vl.c
> > index cc55fe04a2..3db410e771 100644
> > --- a/vl.c
> > +++ b/vl.c
> > @@ -2207,8 +2207,9 @@ static int parse_fw_cfg(void *opaque, QemuOpts *opts, Error **errp)
> >          size = strlen(str); /* NUL terminator NOT included in fw_cfg blob */
> >          buf = g_memdup(str, size);
> >      } else {
> > -        if (!g_file_get_contents(file, &buf, &size, NULL)) {
> > -            error_report("can't load %s", file);
> > +        GError *error = NULL;
> > +        if (!g_file_get_contents(file, &buf, &size, &error)) {
> > +            error_report("can't load %s, %s", file, error->message);

You forgot:

                    g_error_free(error);

With the free:
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

>
> >              return -1;
> >          }
> >      }
> >