emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

fbset: fix mode matching code: original code may trigger false positive.

Browse Source 
E.g. fbset -n '16bit'
 succeeded at 'mode "640x480 16bit"' and that is wrong.
 Also parser is rewritten. By Vladimir.

function                                             old     new   delta
static.syncs                                           -      20     +20
g_options                                              4       -      -4
g_cmdoptions                                         432     385     -47
fbset_main                                          1842    1642    -200
This commit is contained in:
Denis Vlasenko 2008-08-24 16:25:40 +00:00
parent 5770715588
commit b66d16a2e6
1 changed files with 131 additions and 116 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

247
util-linux/fbset.c
View File

@ -18,11 +18,6 @@
#define DEFAULTFBMODE "/etc/fb.modes" #define DEFAULTFBMODE "/etc/fb.modes"
enum { enum {
OPT_CHANGE = (1 << 0),
OPT_INFO = (1 << 1),
OPT_READMODE = (1 << 2),
OPT_ALL = (1 << 9),
CMD_FB = 1, CMD_FB = 1,
CMD_DB = 2, CMD_DB = 2,
CMD_GEOMETRY = 3, CMD_GEOMETRY = 3,
@ -61,8 +56,6 @@ enum {
#endif #endif
}; };
static unsigned g_options;
/* Stuff stolen from the kernel's fb.h */ /* Stuff stolen from the kernel's fb.h */
#define FB_ACTIVATE_ALL 64 #define FB_ACTIVATE_ALL 64
enum { enum {
@ -114,66 +107,66 @@ struct fb_var_screeninfo {
static const struct cmdoptions_t { static const struct cmdoptions_t {
const char name[10]; const char name[9];
const unsigned char param_count; const unsigned char param_count;
const unsigned char code; const unsigned char code;
} g_cmdoptions[] = { } g_cmdoptions[] = {
{ "-fb", 1, CMD_FB }, /*"12345678" + NUL */
{ "-db", 1, CMD_DB }, { "fb" , 1, CMD_FB },
{ "-a", 0, CMD_ALL }, { "db" , 1, CMD_DB },
{ "-i", 0, CMD_INFO }, { "a" , 0, CMD_ALL },
{ "-g", 5, CMD_GEOMETRY }, { "i" , 0, CMD_INFO },
{ "-t", 7, CMD_TIMING }, { "g" , 5, CMD_GEOMETRY },
{ "-accel", 1, CMD_ACCEL }, { "t" , 7, CMD_TIMING },
{ "-hsync", 1, CMD_HSYNC }, { "accel" , 1, CMD_ACCEL },
{ "-vsync", 1, CMD_VSYNC }, { "hsync" , 1, CMD_HSYNC },
{ "-laced", 1, CMD_LACED }, { "vsync" , 1, CMD_VSYNC },
{ "-double", 1, CMD_DOUBLE }, { "laced" , 1, CMD_LACED },
{ "-n", 0, CMD_CHANGE }, { "double" , 1, CMD_DOUBLE },
{ "n" , 0, CMD_CHANGE },
#if ENABLE_FEATURE_FBSET_FANCY #if ENABLE_FEATURE_FBSET_FANCY
{ "-all", 0, CMD_ALL }, { "all" , 0, CMD_ALL },
{ "-xres", 1, CMD_XRES }, { "xres" , 1, CMD_XRES },
{ "-yres", 1, CMD_YRES }, { "yres" , 1, CMD_YRES },
{ "-vxres", 1, CMD_VXRES }, { "vxres" , 1, CMD_VXRES },
{ "-vyres", 1, CMD_VYRES }, { "vyres" , 1, CMD_VYRES },
{ "-depth", 1, CMD_DEPTH }, { "depth" , 1, CMD_DEPTH },
{ "-match", 0, CMD_MATCH }, { "match" , 0, CMD_MATCH },
{ "-geometry", 5, CMD_GEOMETRY }, { "geometry", 5, CMD_GEOMETRY },
{ "-pixclock", 1, CMD_PIXCLOCK }, { "pixclock", 1, CMD_PIXCLOCK },
{ "-left", 1, CMD_LEFT }, { "left" , 1, CMD_LEFT },
{ "-right", 1, CMD_RIGHT }, { "right" , 1, CMD_RIGHT },
{ "-upper", 1, CMD_UPPER }, { "upper" , 1, CMD_UPPER },
{ "-lower", 1, CMD_LOWER }, { "lower" , 1, CMD_LOWER },
{ "-hslen", 1, CMD_HSLEN }, { "hslen" , 1, CMD_HSLEN },
{ "-vslen", 1, CMD_VSLEN }, { "vslen" , 1, CMD_VSLEN },
{ "-timings", 7, CMD_TIMING }, { "timings" , 7, CMD_TIMING },
{ "-csync", 1, CMD_CSYNC }, { "csync" , 1, CMD_CSYNC },
{ "-gsync", 1, CMD_GSYNC }, { "gsync" , 1, CMD_GSYNC },
{ "-extsync", 1, CMD_EXTSYNC }, { "extsync" , 1, CMD_EXTSYNC },
{ "-bcast", 1, CMD_BCAST }, { "bcast" , 1, CMD_BCAST },
{ "-rgba", 1, CMD_RGBA }, { "rgba" , 1, CMD_RGBA },
{ "-step", 1, CMD_STEP }, { "step" , 1, CMD_STEP },
{ "-move", 1, CMD_MOVE }, { "move" , 1, CMD_MOVE },
#endif #endif
{ "", 0, 0 }
}; };
#if ENABLE_FEATURE_FBSET_READMODE #if ENABLE_FEATURE_FBSET_READMODE
/* taken from linux/fb.h */ /* taken from linux/fb.h */
enum { enum {
FB_VMODE_INTERLACED = 1, /* interlaced */ FB_VMODE_INTERLACED = 1, /* interlaced */
FB_VMODE_DOUBLE = 2, /* double scan */ FB_VMODE_DOUBLE = 2, /* double scan */
FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */ FB_SYNC_HOR_HIGH_ACT = 1, /* horizontal sync high active */
FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */ FB_SYNC_VERT_HIGH_ACT = 2, /* vertical sync high active */
FB_SYNC_EXT = 4, /* external sync */ FB_SYNC_EXT = 4, /* external sync */
FB_SYNC_COMP_HIGH_ACT = 8 /* composite sync high active */ FB_SYNC_COMP_HIGH_ACT = 8, /* composite sync high active */
}; };
#endif #endif
#if ENABLE_FEATURE_FBSET_READMODE #if ENABLE_FEATURE_FBSET_READMODE
static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what) static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what)
{ {
if (strstr(buf, what)) if (strcmp(buf, what) == 0)
*x &= ~flag; *x &= ~flag;
else else
*x |= flag; *x |= flag;
@ -182,62 +175,77 @@ static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what)
static int readmode(struct fb_var_screeninfo *base, const char *fn, static int readmode(struct fb_var_screeninfo *base, const char *fn,
const char *mode) const char *mode)
{ {
FILE *f; char *token[2], *p, *s;
char buf[256]; parser_t *parser = config_open(fn);
char *p = buf;
f = xfopen_for_read(fn); while (config_read(parser, token, 2, 1, "# \t\r", PARSE_NORMAL)) {
while (fgets(buf, sizeof(buf), f)) { if (strcmp(token[0], "mode") != 0 || !token[1])
p = strstr(buf, "mode ");
if (!p && !(p = strstr(buf, "mode\t")))
continue; continue;
p = strstr(p + 5, mode); p = strstr(token[1], mode);
if (!p) if (!p)
continue; continue;
p += strlen(mode); s = p + strlen(mode);
if (!isspace(*p) && (*p != 0) && (*p != '"') //bb_info_msg("CHECK[%s][%s][%d]", mode, p-1, *s);
&& (*p != '\r') && (*p != '\n') /* exact match? */
if (((!*s || isspace(*s)) && '"' != s[-1]) /* end-of-token */
|| ('"' == *s && '"' == p[-1]) /* ends with " but starts with " too! */
) { ) {
continue; /* almost, but not quite */ //bb_info_msg("FOUND[%s][%s][%s][%d]", token[1], p, mode, isspace(*s));
break;
} }
}
while (fgets(buf, sizeof(buf), f)) { if (!token[0])
if ((p = strstr(buf, "geometry "))) { return 0;
p += 9;
/* FIXME: catastrophic on arches with 64bit ints */
sscanf(p, "%d %d %d %d %d",
&(base->xres), &(base->yres),
&(base->xres_virtual), &(base->yres_virtual),
&(base->bits_per_pixel));
} else if ((p = strstr(buf, "timings "))) {
p += 8;
sscanf(p, "%d %d %d %d %d %d %d",
&(base->pixclock),
&(base->left_margin), &(base->right_margin),
&(base->upper_margin), &(base->lower_margin),
&(base->hsync_len), &(base->vsync_len));
} else if ((p = strstr(buf, "laced "))) {
//p += 6;
ss(&base->vmode, FB_VMODE_INTERLACED, buf, "false");
} else if ((p = strstr(buf, "double "))) {
//p += 7;
ss(&base->vmode, FB_VMODE_DOUBLE, buf, "false");
} else if ((p = strstr(buf, "vsync "))) {
//p += 6;
ss(&base->sync, FB_SYNC_VERT_HIGH_ACT, buf, "low");
} else if ((p = strstr(buf, "hsync "))) {
//p += 6;
ss(&base->sync, FB_SYNC_HOR_HIGH_ACT, buf, "low");
} else if ((p = strstr(buf, "csync "))) {
//p += 6;
ss(&base->sync, FB_SYNC_COMP_HIGH_ACT, buf, "low");
} else if ((p = strstr(buf, "extsync "))) {
//p += 8;
ss(&base->sync, FB_SYNC_EXT, buf, "false");
}
if (strstr(buf, "endmode")) while (config_read(parser, token, 2, 1, "# \t", PARSE_NORMAL)) {
return 1; int i;
//bb_info_msg("???[%s][%s]", token[0], token[1]);
if (strcmp(token[0], "endmode") == 0) {
//bb_info_msg("OK[%s]", mode);
return 1;
}
p = token[1];
i = index_in_strings(
"geometry\0timings\0interlaced\0double\0vsync\0hsync\0csync\0extsync\0",
token[0]);
switch (i) {
case 0:
/* FIXME: catastrophic on arches with 64bit ints */
sscanf(p, "%d %d %d %d %d",
&(base->xres), &(base->yres),
&(base->xres_virtual), &(base->yres_virtual),
&(base->bits_per_pixel));
//bb_info_msg("GEO[%s]", p);
break;
case 1:
sscanf(p, "%d %d %d %d %d %d %d",
&(base->pixclock),
&(base->left_margin), &(base->right_margin),
&(base->upper_margin), &(base->lower_margin),
&(base->hsync_len), &(base->vsync_len));
//bb_info_msg("TIM[%s]", p);
break;
case 2:
case 3: {
static const uint32_t syncs[] = {FB_VMODE_INTERLACED, FB_VMODE_DOUBLE};
ss(&base->vmode, syncs[i-2], p, "false");
//bb_info_msg("VMODE[%s]", p);
break;
}
case 4:
case 5:
case 6: {
static const uint32_t syncs[] = {FB_SYNC_VERT_HIGH_ACT, FB_SYNC_HOR_HIGH_ACT, FB_SYNC_COMP_HIGH_ACT};
ss(&base->sync, syncs[i-4], p, "low");
//bb_info_msg("SYNC[%s]", p);
break;
}
case 7:
ss(&base->sync, FB_SYNC_EXT, p, "false");
//bb_info_msg("EXTSYNC[%s]", p);
break;
} }
} }
return 0; return 0;
@ -292,22 +300,30 @@ static void showmode(struct fb_var_screeninfo *v)
int fbset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int fbset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fbset_main(int argc, char **argv) int fbset_main(int argc, char **argv)
{ {
enum {
OPT_CHANGE = (1 << 0),
/*OPT_INFO = (1 << 1), ??*/
OPT_READMODE = (1 << 2),
OPT_ALL = (1 << 9),
};
struct fb_var_screeninfo var, varset; struct fb_var_screeninfo var, varset;
int fh, i; int fh, i;
unsigned options = 0;
const char *fbdev = DEFAULTFBDEV; const char *fbdev = DEFAULTFBDEV;
const char *modefile = DEFAULTFBMODE; const char *modefile = DEFAULTFBMODE;
char *thisarg, *mode = NULL; char *thisarg, *mode = NULL;
memset(&varset, 0xFF, sizeof(varset)); memset(&varset, 0xff, sizeof(varset));
/* parse cmd args.... why do they have to make things so difficult? */ /* parse cmd args.... why do they have to make things so difficult? */
argv++; argv++;
argc--; argc--;
for (; argc > 0 && (thisarg = *argv); argc--, argv++) { for (; argc > 0 && (thisarg = *argv) != NULL; argc--, argv++) {
for (i = 0; g_cmdoptions[i].name[0]; i++) { if (thisarg[0] == '-') for (i = 0; i < ARRAY_SIZE(g_cmdoptions); i++) {
if (strcmp(thisarg, g_cmdoptions[i].name)) if (strcmp(thisarg + 1, g_cmdoptions[i].name) != 0)
continue; continue;
if (argc-1 < g_cmdoptions[i].param_count) if (argc <= g_cmdoptions[i].param_count)
bb_show_usage(); bb_show_usage();
switch (g_cmdoptions[i].code) { switch (g_cmdoptions[i].code) {
@ -334,10 +350,10 @@ int fbset_main(int argc, char **argv)
varset.vsync_len = xatou32(argv[7]); varset.vsync_len = xatou32(argv[7]);
break; break;
case CMD_ALL: case CMD_ALL:
g_options |= OPT_ALL; options |= OPT_ALL;
break; break;
case CMD_CHANGE: case CMD_CHANGE:
g_options |= OPT_CHANGE; options |= OPT_CHANGE;
break; break;
#if ENABLE_FEATURE_FBSET_FANCY #if ENABLE_FEATURE_FBSET_FANCY
case CMD_XRES: case CMD_XRES:
@ -353,19 +369,18 @@ int fbset_main(int argc, char **argv)
} }
argc -= g_cmdoptions[i].param_count; argc -= g_cmdoptions[i].param_count;
argv += g_cmdoptions[i].param_count; argv += g_cmdoptions[i].param_count;
break; goto contin;
}
if (!g_cmdoptions[i].name[0]) {
if (argc != 1)
bb_show_usage();
mode = *argv;
g_options |= OPT_READMODE;
} }
if (argc != 1)
bb_show_usage();
mode = *argv;
options |= OPT_READMODE;
contin: ;
} }
fh = xopen(fbdev, O_RDONLY); fh = xopen(fbdev, O_RDONLY);
xioctl(fh, FBIOGET_VSCREENINFO, &var); xioctl(fh, FBIOGET_VSCREENINFO, &var);
if (g_options & OPT_READMODE) { if (options & OPT_READMODE) {
#if !ENABLE_FEATURE_FBSET_READMODE #if !ENABLE_FEATURE_FBSET_READMODE
bb_show_usage(); bb_show_usage();
#else #else
@ -376,8 +391,8 @@ int fbset_main(int argc, char **argv)
} }
setmode(&var, &varset); setmode(&var, &varset);
if (g_options & OPT_CHANGE) { if (options & OPT_CHANGE) {
if (g_options & OPT_ALL) if (options & OPT_ALL)
var.activate = FB_ACTIVATE_ALL; var.activate = FB_ACTIVATE_ALL;
xioctl(fh, FBIOPUT_VSCREENINFO, &var); xioctl(fh, FBIOPUT_VSCREENINFO, &var);
} }