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- bail out if screen resolution does not match PPM dimensions.

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Previously a 640x480 PPM on an e.g. 720x400 console would just segfault when
  reading the lines. While this bug should perhaps be fixed to handle such cases
  properly we just exit gracefully until somebody is willing to take care of it
  properly.
This commit is contained in:
Bernhard Reutner-Fischer 2009-02-18 15:28:43 +00:00
parent 8dcb33c3eb
commit 7307e06122
2 changed files with 28 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
miscutils/fbsplash.c
View File

@ -257,7 +257,9 @@ static void fb_drawimage(void)
if (ENABLE_FEATURE_CLEAN_UP)
free(head);
if (width != G.scr_var.xres || height != G.scr_var.yres)
bb_error_msg_and_die("PPM %dx%d does not match screen %dx%d",
width, height, G.scr_var.xres, G.scr_var.yres);
line_size = width*3;
if (width > G.scr_var.xres)
width = G.scr_var.xres;

38
util-linux/fbset.c
View File

@ -30,7 +30,8 @@ enum {
/* CMD_XCOMPAT = 10, */
CMD_ALL = 11,
CMD_INFO = 12,
CMD_CHANGE = 13,
CMD_SHOW = 13,
CMD_CHANGE = 14,
#if ENABLE_FEATURE_FBSET_FANCY
CMD_XRES = 100,
@ -123,7 +124,8 @@ static const struct cmdoptions_t {
{ "vsync" , 1, CMD_VSYNC },
{ "laced" , 1, CMD_LACED },
{ "double" , 1, CMD_DOUBLE },
{ "n" , 0, CMD_CHANGE },
{ "show" , 0, CMD_SHOW },
{ "s" , 0, CMD_SHOW },
#if ENABLE_FEATURE_FBSET_FANCY
{ "all" , 0, CMD_ALL },
{ "xres" , 1, CMD_XRES },
@ -172,7 +174,7 @@ static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what)
*x |= flag;
}
static int readmode(struct fb_var_screeninfo *base, const char *fn,
static int read_mode_db(struct fb_var_screeninfo *base, const char *fn,
const char *mode)
{
char *token[2], *p, *s;
@ -302,7 +304,7 @@ int fbset_main(int argc, char **argv)
{
enum {
OPT_CHANGE = (1 << 0),
/*OPT_INFO = (1 << 1), ??*/
OPT_SHOW = (1 << 1),
OPT_READMODE = (1 << 2),
OPT_ALL = (1 << 9),
};
@ -333,6 +335,12 @@ int fbset_main(int argc, char **argv)
case CMD_DB:
modefile = argv[1];
break;
case CMD_ALL:
options |= OPT_ALL;
break;
case CMD_SHOW:
options |= OPT_SHOW;
break;
case CMD_GEOMETRY:
varset.xres = xatou32(argv[1]);
varset.yres = xatou32(argv[2]);
@ -349,12 +357,6 @@ int fbset_main(int argc, char **argv)
varset.hsync_len = xatou32(argv[6]);
varset.vsync_len = xatou32(argv[7]);
break;
case CMD_ALL:
options |= OPT_ALL;
break;
case CMD_CHANGE:
options |= OPT_CHANGE;
break;
#if ENABLE_FEATURE_FBSET_FANCY
case CMD_XRES:
varset.xres = xatou32(argv[1]);
@ -367,6 +369,15 @@ int fbset_main(int argc, char **argv)
break;
#endif
}
switch (g_cmdoptions[i].code) {
case CMD_FB:
case CMD_DB:
case CMD_ALL:
case CMD_SHOW:
break;
default:
options |= OPT_CHANGE; /* the other commands imply changes */
}
argc -= g_cmdoptions[i].param_count;
argv += g_cmdoptions[i].param_count;
goto contin;
@ -384,19 +395,20 @@ int fbset_main(int argc, char **argv)
#if !ENABLE_FEATURE_FBSET_READMODE
bb_show_usage();
#else
if (!readmode(&var, modefile, mode)) {
if (!read_mode_db(&var, modefile, mode)) {
bb_error_msg_and_die("unknown video mode '%s'", mode);
}
#endif
}
setmode(&var, &varset);
if (options & OPT_CHANGE) {
setmode(&var, &varset);
if (options & OPT_ALL)
var.activate = FB_ACTIVATE_ALL;
xioctl(fh, FBIOPUT_VSCREENINFO, &var);
}
showmode(&var);
if (options == 0 || options & OPT_SHOW)
showmode(&var);
/* Don't close the file, as exiting will take care of that */
/* close(fh); */