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evas/fb: handle fds using -1 for unset/error. 

clean evas_fb_main.c so it returns -1 to indicate invalid fds, same as
open() and what is written in evas_fb.h example.

call fb_cleanup() in all error conditions and always return -1 in
fb_postinit() if we did call fb_cleanup().
This commit is contained in:
Gustavo Sverzut Barbieri 2014-03-06 02:09:44 -03:00
parent e4c5d75993
commit b0aa7325ae
1 changed files with 24 additions and 10 deletions
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34
src/modules/evas/engines/fb/evas_fb_main.c
View File

@ -22,7 +22,7 @@
/* internal variables */
static struct fb_fix_screeninfo fb_fix;
static int fb, tty;
static int fb = -1, tty = -1;
static int bpp, depth;
//static int orig_vt_no = 0;
static int kd_mode;
@ -449,9 +449,9 @@ fb_setvt(int vtno)
void
fb_init(int vt EINA_UNUSED, int device)
{
char dev[32];
char dev[PATH_MAX];
tty = 0;
tty = -1;
#if 0
if (vt != 0) fb_setvt(vt);
#endif
@ -461,7 +461,10 @@ fb_init(int vt EINA_UNUSED, int device)
(getuid() == geteuid()) &&
#endif
(getenv("EVAS_FB_DEV")))
fb = open(getenv("EVAS_FB_DEV"), O_RDWR);
{
eina_strlcpy(dev, getenv("EVAS_FB_DEV"), sizeof(dev));
fb = open(dev, O_RDWR);
}
else
{
sprintf(dev, "/dev/fb/%i", device);
@ -507,7 +510,7 @@ fb_init(int vt EINA_UNUSED, int device)
CITICAL("open %s: %s", "/dev/tty", strerror(errno));
return;
}
if (tty)
if (tty >= 0)
{
if (ioctl(tty, KDGETMODE, &kd_mode) == -1)
{
@ -526,18 +529,22 @@ fb_init(int vt EINA_UNUSED, int device)
int
fb_postinit(FB_Mode *mode)
{
EINA_SAFETY_ON_NULL_RETURN_VAL(mode, -1);
if (fb < 0)
return -1;
if (ioctl(fb,FBIOGET_FSCREENINFO, &fb_fix) == -1)
{
perror("ioctl FBIOGET_FSCREENINFO");
fb_cleanup();
return 0;
return -1;
}
if (fb_fix.type != FB_TYPE_PACKED_PIXELS)
{
CRI("can handle only packed pixel frame buffers");
fb_cleanup();
return 0;
return -1;
}
mode->mem_offset = (unsigned)(fb_fix.smem_start) & (getpagesize()-1);
mode->mem = (unsigned char *)mmap(NULL, fb_fix.smem_len + mode->mem_offset,
@ -546,6 +553,7 @@ fb_postinit(FB_Mode *mode)
{
perror("mmap");
fb_cleanup();
return -1;
}
/* move viewport to upper left corner */
if ((mode->fb_var.xoffset != 0) || (mode->fb_var.yoffset != 0))
@ -557,15 +565,17 @@ fb_postinit(FB_Mode *mode)
{
perror("ioctl FBIOPAN_DISPLAY");
fb_cleanup();
return -1;
}
}
#if 0
if (tty)
if (tty >= 0)
{
if (ioctl(tty,KDSETMODE, KD_GRAPHICS) == -1)
{
perror("ioctl KDSETMODE");
fb_cleanup();
return -1;
}
}
#endif
@ -576,6 +586,7 @@ fb_postinit(FB_Mode *mode)
static void
fb_cleanup(void)
{
if (fb < 0) return;
/* restore console */
if (ioctl(fb, FBIOPUT_VSCREENINFO, &fb_ovar) == -1)
perror("ioctl FBIOPUT_VSCREENINFO");
@ -588,7 +599,8 @@ fb_cleanup(void)
perror("ioctl FBIOPUTCMAP");
}
close(fb);
if (tty)
fb = -1;
if (tty >= 0)
{
if (ioctl(tty, KDSETMODE, kd_mode) == -1)
perror("ioctl KDSETMODE");
@ -598,6 +610,8 @@ fb_cleanup(void)
if ((ioctl(tty, VT_ACTIVATE, orig_vt_no) == -1) && (orig_vt_no))
perror("ioctl VT_ACTIVATE");
#endif
if (tty > 0) /* don't close if got from isatty(0) */
close(tty);
}
close(tty);
tty = -1;
}