From 806be7adc04ddfe9677e66116342762e093d80f9 Mon Sep 17 00:00:00 2001
From: Gustavo Sverzut Barbieri <barbieri@profusion.mobi>
Date: Tue, 3 Jan 2017 12:41:07 -0200
Subject: [PATCH] ecore_fb_init(): use 'name' parameter similar to
 ecore_evas_fb_new().

Instead of assuming /dev/fb/0 or /dev/fb0, use the given 'name'
parameter in a similar way to ecore_evas_fb_new(): a number to be
parsed with 'strtoul()'.

Without this calling ecore_evas_fb_new() or ecore_evas_new() with
'display=1' will produce incorrect results.

@fix
---
 src/lib/ecore_fb/ecore_fb.c | 39 +++++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/src/lib/ecore_fb/ecore_fb.c b/src/lib/ecore_fb/ecore_fb.c
index 85ad087..eec3904 100644
--- a/src/lib/ecore_fb/ecore_fb.c
+++ b/src/lib/ecore_fb/ecore_fb.c
@@ -4,8 +4,9 @@
 
 #include "Ecore_Fb.h"
 #include "ecore_fb_private.h"
+#include <limits.h>
 
-static void _ecore_fb_size_get(int *w, int *h);
+static void _ecore_fb_size_get(const char *name, int *w, int *h);
 
 static int _ecore_fb_init_count = 0;
 static int _ecore_fb_console_w = 0;
@@ -38,7 +39,7 @@ nosigint(int val EINA_UNUSED)
  * the Ecore_Fb library.
  */
 EAPI int
-ecore_fb_init(const char *name EINA_UNUSED)
+ecore_fb_init(const char *name)
 {
    if (++_ecore_fb_init_count != 1)
       return _ecore_fb_init_count;
@@ -51,7 +52,7 @@ ecore_fb_init(const char *name EINA_UNUSED)
         oldhand = signal(SIGINT, nosigint);
      }
    
-   _ecore_fb_size_get(&_ecore_fb_console_w, &_ecore_fb_console_h);
+   _ecore_fb_size_get(name, &_ecore_fb_console_w, &_ecore_fb_console_h);
 
    return _ecore_fb_init_count;
 }
@@ -103,7 +104,7 @@ ecore_fb_size_get(int *w, int *h)
 }
 
 static void
-_ecore_fb_size_get(int *w, int *h)
+_ecore_fb_size_get(const char *name, int *w, int *h)
 {
    struct fb_var_screeninfo fb_var;
    int fb;
@@ -113,18 +114,40 @@ _ecore_fb_size_get(int *w, int *h)
        (getuid() == geteuid()) &&
 #endif
        (getenv("EVAS_FB_DEV")))
-     fb = open(getenv("EVAS_FB_DEV"), O_RDWR);
+     {
+        fb = open(getenv("EVAS_FB_DEV"), O_RDWR);
+        if (fb < 0)
+          fprintf(stderr, "[ecore_fb] error opening $EVAS_FB_DEV=%s: %s\n", getenv("EVAS_FB_DEV"), strerror(errno));
+     }
    else
      {
-        fb = open("/dev/fb/0", O_RDWR);
+        char dev[PATH_MAX];
+        int device;
+
+        /* consistent with ecore_evas_default_display in ecore_evas_fb.c */
+        if (!name) name = "0";
+
+        /* consistent with ecore_evas_fb.c -> evas_fb_main.c */
+        device = strtol(name, NULL, 10);
+
+        snprintf(dev, sizeof(dev), "/dev/fb/%i", device);
+        fb = open(dev, O_RDWR);
         if (fb == -1)
-          fb = open("/dev/fb0", O_RDWR);
+          {
+             snprintf(dev, sizeof(dev), "/dev/fb%i", device);
+             fb = open(dev, O_RDWR);
+             if (fb < 0)
+               fprintf(stderr, "[ecore_fb] error opening /dev/fb/%i and /dev/fb%i: %s\n", device, device, strerror(errno));
+          }
      }
    if (fb < 0)
       goto exit;
 
    if (ioctl(fb, FBIOGET_VSCREENINFO, &fb_var) == -1)
-      goto err_ioctl;
+     {
+        perror("[ecore_fb] ioctl FBIOGET_VSCREENINFO");
+        goto err_ioctl;
+     }
 
    *w = fb_var.xres;
    *h = fb_var.yres;
-- 
2.7.4